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cifs: ignore the "mand", "nomand" and "_netdev" mount options
[linux-2.6/cjktty.git] / fs / cifs / connect.c
blob85a994c6433da1de443817828fdaca238cdcc47d
1 /*
2 * fs/cifs/connect.c
3 *
4 * Copyright (C) International Business Machines Corp., 2002,2009
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/slab.h>
27 #include <linux/pagemap.h>
28 #include <linux/ctype.h>
29 #include <linux/utsname.h>
30 #include <linux/mempool.h>
31 #include <linux/delay.h>
32 #include <linux/completion.h>
33 #include <linux/kthread.h>
34 #include <linux/pagevec.h>
35 #include <linux/freezer.h>
36 #include <linux/namei.h>
37 #include <asm/uaccess.h>
38 #include <asm/processor.h>
39 #include <linux/inet.h>
40 #include <net/ipv6.h>
41 #include "cifspdu.h"
42 #include "cifsglob.h"
43 #include "cifsproto.h"
44 #include "cifs_unicode.h"
45 #include "cifs_debug.h"
46 #include "cifs_fs_sb.h"
47 #include "ntlmssp.h"
48 #include "nterr.h"
49 #include "rfc1002pdu.h"
50 #include "cn_cifs.h"
51 #include "fscache.h"
52
53 #define CIFS_PORT 445
54 #define RFC1001_PORT 139
55
56 extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
57 unsigned char *p24);
58
59 extern mempool_t *cifs_req_poolp;
60
61 struct smb_vol {
62 char *username;
63 char *password;
64 char *domainname;
65 char *UNC;
66 char *UNCip;
67 char *iocharset; /* local code page for mapping to and from Unicode */
68 char source_rfc1001_name[16]; /* netbios name of client */
69 char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
70 uid_t cred_uid;
71 uid_t linux_uid;
72 gid_t linux_gid;
73 mode_t file_mode;
74 mode_t dir_mode;
75 unsigned secFlg;
76 bool retry:1;
77 bool intr:1;
78 bool setuids:1;
79 bool override_uid:1;
80 bool override_gid:1;
81 bool dynperm:1;
82 bool noperm:1;
83 bool no_psx_acl:1; /* set if posix acl support should be disabled */
84 bool cifs_acl:1;
85 bool no_xattr:1; /* set if xattr (EA) support should be disabled*/
86 bool server_ino:1; /* use inode numbers from server ie UniqueId */
87 bool direct_io:1;
88 bool remap:1; /* set to remap seven reserved chars in filenames */
89 bool posix_paths:1; /* unset to not ask for posix pathnames. */
90 bool no_linux_ext:1;
91 bool sfu_emul:1;
92 bool nullauth:1; /* attempt to authenticate with null user */
93 bool nocase:1; /* request case insensitive filenames */
94 bool nobrl:1; /* disable sending byte range locks to srv */
95 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
96 bool seal:1; /* request transport encryption on share */
97 bool nodfs:1; /* Do not request DFS, even if available */
98 bool local_lease:1; /* check leases only on local system, not remote */
99 bool noblocksnd:1;
100 bool noautotune:1;
101 bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
102 bool fsc:1; /* enable fscache */
103 unsigned int rsize;
104 unsigned int wsize;
105 bool sockopt_tcp_nodelay:1;
106 unsigned short int port;
107 char *prepath;
108 struct nls_table *local_nls;
109 };
110
111 static int ipv4_connect(struct TCP_Server_Info *server);
112 static int ipv6_connect(struct TCP_Server_Info *server);
113
114 /*
115 * cifs tcp session reconnection
116 *
117 * mark tcp session as reconnecting so temporarily locked
118 * mark all smb sessions as reconnecting for tcp session
119 * reconnect tcp session
120 * wake up waiters on reconnection? - (not needed currently)
121 */
122 static int
123 cifs_reconnect(struct TCP_Server_Info *server)
124 {
125 int rc = 0;
126 struct list_head *tmp, *tmp2;
127 struct cifsSesInfo *ses;
128 struct cifsTconInfo *tcon;
129 struct mid_q_entry *mid_entry;
130
131 spin_lock(&GlobalMid_Lock);
132 if (server->tcpStatus == CifsExiting) {
133 /* the demux thread will exit normally
134 next time through the loop */
135 spin_unlock(&GlobalMid_Lock);
136 return rc;
137 } else
138 server->tcpStatus = CifsNeedReconnect;
139 spin_unlock(&GlobalMid_Lock);
140 server->maxBuf = 0;
141
142 cFYI(1, "Reconnecting tcp session");
143
144 /* before reconnecting the tcp session, mark the smb session (uid)
145 and the tid bad so they are not used until reconnected */
146 read_lock(&cifs_tcp_ses_lock);
147 list_for_each(tmp, &server->smb_ses_list) {
148 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
149 ses->need_reconnect = true;
150 ses->ipc_tid = 0;
151 list_for_each(tmp2, &ses->tcon_list) {
152 tcon = list_entry(tmp2, struct cifsTconInfo, tcon_list);
153 tcon->need_reconnect = true;
154 }
155 }
156 read_unlock(&cifs_tcp_ses_lock);
157 /* do not want to be sending data on a socket we are freeing */
158 mutex_lock(&server->srv_mutex);
159 if (server->ssocket) {
160 cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state,
161 server->ssocket->flags);
162 kernel_sock_shutdown(server->ssocket, SHUT_WR);
163 cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx",
164 server->ssocket->state,
165 server->ssocket->flags);
166 sock_release(server->ssocket);
167 server->ssocket = NULL;
168 }
169
170 spin_lock(&GlobalMid_Lock);
171 list_for_each(tmp, &server->pending_mid_q) {
172 mid_entry = list_entry(tmp, struct
173 mid_q_entry,
174 qhead);
175 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
176 /* Mark other intransit requests as needing
177 retry so we do not immediately mark the
178 session bad again (ie after we reconnect
179 below) as they timeout too */
180 mid_entry->midState = MID_RETRY_NEEDED;
181 }
182 }
183 spin_unlock(&GlobalMid_Lock);
184 mutex_unlock(&server->srv_mutex);
185
186 while ((server->tcpStatus != CifsExiting) &&
187 (server->tcpStatus != CifsGood)) {
188 try_to_freeze();
189 if (server->addr.sockAddr6.sin6_family == AF_INET6)
190 rc = ipv6_connect(server);
191 else
192 rc = ipv4_connect(server);
193 if (rc) {
194 cFYI(1, "reconnect error %d", rc);
195 msleep(3000);
196 } else {
197 atomic_inc(&tcpSesReconnectCount);
198 spin_lock(&GlobalMid_Lock);
199 if (server->tcpStatus != CifsExiting)
200 server->tcpStatus = CifsGood;
201 server->sequence_number = 0;
202 spin_unlock(&GlobalMid_Lock);
203 /* atomic_set(&server->inFlight,0);*/
204 wake_up(&server->response_q);
205 }
206 }
207 return rc;
208 }
209
210 /*
211 return codes:
212 0 not a transact2, or all data present
213 >0 transact2 with that much data missing
214 -EINVAL = invalid transact2
215
216 */
217 static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
218 {
219 struct smb_t2_rsp *pSMBt;
220 int total_data_size;
221 int data_in_this_rsp;
222 int remaining;
223
224 if (pSMB->Command != SMB_COM_TRANSACTION2)
225 return 0;
226
227 /* check for plausible wct, bcc and t2 data and parm sizes */
228 /* check for parm and data offset going beyond end of smb */
229 if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
230 cFYI(1, "invalid transact2 word count");
231 return -EINVAL;
232 }
233
234 pSMBt = (struct smb_t2_rsp *)pSMB;
235
236 total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
237 data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
238
239 remaining = total_data_size - data_in_this_rsp;
240
241 if (remaining == 0)
242 return 0;
243 else if (remaining < 0) {
244 cFYI(1, "total data %d smaller than data in frame %d",
245 total_data_size, data_in_this_rsp);
246 return -EINVAL;
247 } else {
248 cFYI(1, "missing %d bytes from transact2, check next response",
249 remaining);
250 if (total_data_size > maxBufSize) {
251 cERROR(1, "TotalDataSize %d is over maximum buffer %d",
252 total_data_size, maxBufSize);
253 return -EINVAL;
254 }
255 return remaining;
256 }
257 }
258
259 static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
260 {
261 struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
262 struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB;
263 int total_data_size;
264 int total_in_buf;
265 int remaining;
266 int total_in_buf2;
267 char *data_area_of_target;
268 char *data_area_of_buf2;
269 __u16 byte_count;
270
271 total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
272
273 if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
274 cFYI(1, "total data size of primary and secondary t2 differ");
275 }
276
277 total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
278
279 remaining = total_data_size - total_in_buf;
280
281 if (remaining < 0)
282 return -EINVAL;
283
284 if (remaining == 0) /* nothing to do, ignore */
285 return 0;
286
287 total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
288 if (remaining < total_in_buf2) {
289 cFYI(1, "transact2 2nd response contains too much data");
290 }
291
292 /* find end of first SMB data area */
293 data_area_of_target = (char *)&pSMBt->hdr.Protocol +
294 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
295 /* validate target area */
296
297 data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
298 le16_to_cpu(pSMB2->t2_rsp.DataOffset);
299
300 data_area_of_target += total_in_buf;
301
302 /* copy second buffer into end of first buffer */
303 memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2);
304 total_in_buf += total_in_buf2;
305 pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
306 byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
307 byte_count += total_in_buf2;
308 BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
309
310 byte_count = pTargetSMB->smb_buf_length;
311 byte_count += total_in_buf2;
312
313 /* BB also add check that we are not beyond maximum buffer size */
314
315 pTargetSMB->smb_buf_length = byte_count;
316
317 if (remaining == total_in_buf2) {
318 cFYI(1, "found the last secondary response");
319 return 0; /* we are done */
320 } else /* more responses to go */
321 return 1;
322
323 }
324
325 static int
326 cifs_demultiplex_thread(struct TCP_Server_Info *server)
327 {
328 int length;
329 unsigned int pdu_length, total_read;
330 struct smb_hdr *smb_buffer = NULL;
331 struct smb_hdr *bigbuf = NULL;
332 struct smb_hdr *smallbuf = NULL;
333 struct msghdr smb_msg;
334 struct kvec iov;
335 struct socket *csocket = server->ssocket;
336 struct list_head *tmp;
337 struct cifsSesInfo *ses;
338 struct task_struct *task_to_wake = NULL;
339 struct mid_q_entry *mid_entry;
340 char temp;
341 bool isLargeBuf = false;
342 bool isMultiRsp;
343 int reconnect;
344
345 current->flags |= PF_MEMALLOC;
346 cFYI(1, "Demultiplex PID: %d", task_pid_nr(current));
347
348 length = atomic_inc_return(&tcpSesAllocCount);
349 if (length > 1)
350 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
351 GFP_KERNEL);
352
353 set_freezable();
354 while (server->tcpStatus != CifsExiting) {
355 if (try_to_freeze())
356 continue;
357 if (bigbuf == NULL) {
358 bigbuf = cifs_buf_get();
359 if (!bigbuf) {
360 cERROR(1, "No memory for large SMB response");
361 msleep(3000);
362 /* retry will check if exiting */
363 continue;
364 }
365 } else if (isLargeBuf) {
366 /* we are reusing a dirty large buf, clear its start */
367 memset(bigbuf, 0, sizeof(struct smb_hdr));
368 }
369
370 if (smallbuf == NULL) {
371 smallbuf = cifs_small_buf_get();
372 if (!smallbuf) {
373 cERROR(1, "No memory for SMB response");
374 msleep(1000);
375 /* retry will check if exiting */
376 continue;
377 }
378 /* beginning of smb buffer is cleared in our buf_get */
379 } else /* if existing small buf clear beginning */
380 memset(smallbuf, 0, sizeof(struct smb_hdr));
381
382 isLargeBuf = false;
383 isMultiRsp = false;
384 smb_buffer = smallbuf;
385 iov.iov_base = smb_buffer;
386 iov.iov_len = 4;
387 smb_msg.msg_control = NULL;
388 smb_msg.msg_controllen = 0;
389 pdu_length = 4; /* enough to get RFC1001 header */
390 incomplete_rcv:
391 length =
392 kernel_recvmsg(csocket, &smb_msg,
393 &iov, 1, pdu_length, 0 /* BB other flags? */);
394
395 if (server->tcpStatus == CifsExiting) {
396 break;
397 } else if (server->tcpStatus == CifsNeedReconnect) {
398 cFYI(1, "Reconnect after server stopped responding");
399 cifs_reconnect(server);
400 cFYI(1, "call to reconnect done");
401 csocket = server->ssocket;
402 continue;
403 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
404 msleep(1); /* minimum sleep to prevent looping
405 allowing socket to clear and app threads to set
406 tcpStatus CifsNeedReconnect if server hung */
407 if (pdu_length < 4) {
408 iov.iov_base = (4 - pdu_length) +
409 (char *)smb_buffer;
410 iov.iov_len = pdu_length;
411 smb_msg.msg_control = NULL;
412 smb_msg.msg_controllen = 0;
413 goto incomplete_rcv;
414 } else
415 continue;
416 } else if (length <= 0) {
417 if (server->tcpStatus == CifsNew) {
418 cFYI(1, "tcp session abend after SMBnegprot");
419 /* some servers kill the TCP session rather than
420 returning an SMB negprot error, in which
421 case reconnecting here is not going to help,
422 and so simply return error to mount */
423 break;
424 }
425 if (!try_to_freeze() && (length == -EINTR)) {
426 cFYI(1, "cifsd thread killed");
427 break;
428 }
429 cFYI(1, "Reconnect after unexpected peek error %d",
430 length);
431 cifs_reconnect(server);
432 csocket = server->ssocket;
433 wake_up(&server->response_q);
434 continue;
435 } else if (length < pdu_length) {
436 cFYI(1, "requested %d bytes but only got %d bytes",
437 pdu_length, length);
438 pdu_length -= length;
439 msleep(1);
440 goto incomplete_rcv;
441 }
442
443 /* The right amount was read from socket - 4 bytes */
444 /* so we can now interpret the length field */
445
446 /* the first byte big endian of the length field,
447 is actually not part of the length but the type
448 with the most common, zero, as regular data */
449 temp = *((char *) smb_buffer);
450
451 /* Note that FC 1001 length is big endian on the wire,
452 but we convert it here so it is always manipulated
453 as host byte order */
454 pdu_length = be32_to_cpu((__force __be32)smb_buffer->smb_buf_length);
455 smb_buffer->smb_buf_length = pdu_length;
456
457 cFYI(1, "rfc1002 length 0x%x", pdu_length+4);
458
459 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
460 continue;
461 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
462 cFYI(1, "Good RFC 1002 session rsp");
463 continue;
464 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
465 /* we get this from Windows 98 instead of
466 an error on SMB negprot response */
467 cFYI(1, "Negative RFC1002 Session Response Error 0x%x)",
468 pdu_length);
469 if (server->tcpStatus == CifsNew) {
470 /* if nack on negprot (rather than
471 ret of smb negprot error) reconnecting
472 not going to help, ret error to mount */
473 break;
474 } else {
475 /* give server a second to
476 clean up before reconnect attempt */
477 msleep(1000);
478 /* always try 445 first on reconnect
479 since we get NACK on some if we ever
480 connected to port 139 (the NACK is
481 since we do not begin with RFC1001
482 session initialize frame) */
483 server->addr.sockAddr.sin_port =
484 htons(CIFS_PORT);
485 cifs_reconnect(server);
486 csocket = server->ssocket;
487 wake_up(&server->response_q);
488 continue;
489 }
490 } else if (temp != (char) 0) {
491 cERROR(1, "Unknown RFC 1002 frame");
492 cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
493 length);
494 cifs_reconnect(server);
495 csocket = server->ssocket;
496 continue;
497 }
498
499 /* else we have an SMB response */
500 if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
501 (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) {
502 cERROR(1, "Invalid size SMB length %d pdu_length %d",
503 length, pdu_length+4);
504 cifs_reconnect(server);
505 csocket = server->ssocket;
506 wake_up(&server->response_q);
507 continue;
508 }
509
510 /* else length ok */
511 reconnect = 0;
512
513 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
514 isLargeBuf = true;
515 memcpy(bigbuf, smallbuf, 4);
516 smb_buffer = bigbuf;
517 }
518 length = 0;
519 iov.iov_base = 4 + (char *)smb_buffer;
520 iov.iov_len = pdu_length;
521 for (total_read = 0; total_read < pdu_length;
522 total_read += length) {
523 length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
524 pdu_length - total_read, 0);
525 if ((server->tcpStatus == CifsExiting) ||
526 (length == -EINTR)) {
527 /* then will exit */
528 reconnect = 2;
529 break;
530 } else if (server->tcpStatus == CifsNeedReconnect) {
531 cifs_reconnect(server);
532 csocket = server->ssocket;
533 /* Reconnect wakes up rspns q */
534 /* Now we will reread sock */
535 reconnect = 1;
536 break;
537 } else if ((length == -ERESTARTSYS) ||
538 (length == -EAGAIN)) {
539 msleep(1); /* minimum sleep to prevent looping,
540 allowing socket to clear and app
541 threads to set tcpStatus
542 CifsNeedReconnect if server hung*/
543 length = 0;
544 continue;
545 } else if (length <= 0) {
546 cERROR(1, "Received no data, expecting %d",
547 pdu_length - total_read);
548 cifs_reconnect(server);
549 csocket = server->ssocket;
550 reconnect = 1;
551 break;
552 }
553 }
554 if (reconnect == 2)
555 break;
556 else if (reconnect == 1)
557 continue;
558
559 length += 4; /* account for rfc1002 hdr */
560
561
562 dump_smb(smb_buffer, length);
563 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
564 cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
565 continue;
566 }
567
568
569 task_to_wake = NULL;
570 spin_lock(&GlobalMid_Lock);
571 list_for_each(tmp, &server->pending_mid_q) {
572 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
573
574 if ((mid_entry->mid == smb_buffer->Mid) &&
575 (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
576 (mid_entry->command == smb_buffer->Command)) {
577 if (check2ndT2(smb_buffer,server->maxBuf) > 0) {
578 /* We have a multipart transact2 resp */
579 isMultiRsp = true;
580 if (mid_entry->resp_buf) {
581 /* merge response - fix up 1st*/
582 if (coalesce_t2(smb_buffer,
583 mid_entry->resp_buf)) {
584 mid_entry->multiRsp =
585 true;
586 break;
587 } else {
588 /* all parts received */
589 mid_entry->multiEnd =
590 true;
591 goto multi_t2_fnd;
592 }
593 } else {
594 if (!isLargeBuf) {
595 cERROR(1, "1st trans2 resp needs bigbuf");
596 /* BB maybe we can fix this up, switch
597 to already allocated large buffer? */
598 } else {
599 /* Have first buffer */
600 mid_entry->resp_buf =
601 smb_buffer;
602 mid_entry->largeBuf =
603 true;
604 bigbuf = NULL;
605 }
606 }
607 break;
608 }
609 mid_entry->resp_buf = smb_buffer;
610 mid_entry->largeBuf = isLargeBuf;
611 multi_t2_fnd:
612 task_to_wake = mid_entry->tsk;
613 mid_entry->midState = MID_RESPONSE_RECEIVED;
614 #ifdef CONFIG_CIFS_STATS2
615 mid_entry->when_received = jiffies;
616 #endif
617 /* so we do not time out requests to server
618 which is still responding (since server could
619 be busy but not dead) */
620 server->lstrp = jiffies;
621 break;
622 }
623 }
624 spin_unlock(&GlobalMid_Lock);
625 if (task_to_wake) {
626 /* Was previous buf put in mpx struct for multi-rsp? */
627 if (!isMultiRsp) {
628 /* smb buffer will be freed by user thread */
629 if (isLargeBuf)
630 bigbuf = NULL;
631 else
632 smallbuf = NULL;
633 }
634 wake_up_process(task_to_wake);
635 } else if (!is_valid_oplock_break(smb_buffer, server) &&
636 !isMultiRsp) {
637 cERROR(1, "No task to wake, unknown frame received! "
638 "NumMids %d", midCount.counter);
639 cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
640 sizeof(struct smb_hdr));
641 #ifdef CONFIG_CIFS_DEBUG2
642 cifs_dump_detail(smb_buffer);
643 cifs_dump_mids(server);
644 #endif /* CIFS_DEBUG2 */
645
646 }
647 } /* end while !EXITING */
648
649 /* take it off the list, if it's not already */
650 write_lock(&cifs_tcp_ses_lock);
651 list_del_init(&server->tcp_ses_list);
652 write_unlock(&cifs_tcp_ses_lock);
653
654 spin_lock(&GlobalMid_Lock);
655 server->tcpStatus = CifsExiting;
656 spin_unlock(&GlobalMid_Lock);
657 wake_up_all(&server->response_q);
658
659 /* check if we have blocked requests that need to free */
660 /* Note that cifs_max_pending is normally 50, but
661 can be set at module install time to as little as two */
662 spin_lock(&GlobalMid_Lock);
663 if (atomic_read(&server->inFlight) >= cifs_max_pending)
664 atomic_set(&server->inFlight, cifs_max_pending - 1);
665 /* We do not want to set the max_pending too low or we
666 could end up with the counter going negative */
667 spin_unlock(&GlobalMid_Lock);
668 /* Although there should not be any requests blocked on
669 this queue it can not hurt to be paranoid and try to wake up requests
670 that may haven been blocked when more than 50 at time were on the wire
671 to the same server - they now will see the session is in exit state
672 and get out of SendReceive. */
673 wake_up_all(&server->request_q);
674 /* give those requests time to exit */
675 msleep(125);
676
677 if (server->ssocket) {
678 sock_release(csocket);
679 server->ssocket = NULL;
680 }
681 /* buffer usuallly freed in free_mid - need to free it here on exit */
682 cifs_buf_release(bigbuf);
683 if (smallbuf) /* no sense logging a debug message if NULL */
684 cifs_small_buf_release(smallbuf);
685
686 /*
687 * BB: we shouldn't have to do any of this. It shouldn't be
688 * possible to exit from the thread with active SMB sessions
689 */
690 read_lock(&cifs_tcp_ses_lock);
691 if (list_empty(&server->pending_mid_q)) {
692 /* loop through server session structures attached to this and
693 mark them dead */
694 list_for_each(tmp, &server->smb_ses_list) {
695 ses = list_entry(tmp, struct cifsSesInfo,
696 smb_ses_list);
697 ses->status = CifsExiting;
698 ses->server = NULL;
699 }
700 read_unlock(&cifs_tcp_ses_lock);
701 } else {
702 /* although we can not zero the server struct pointer yet,
703 since there are active requests which may depnd on them,
704 mark the corresponding SMB sessions as exiting too */
705 list_for_each(tmp, &server->smb_ses_list) {
706 ses = list_entry(tmp, struct cifsSesInfo,
707 smb_ses_list);
708 ses->status = CifsExiting;
709 }
710
711 spin_lock(&GlobalMid_Lock);
712 list_for_each(tmp, &server->pending_mid_q) {
713 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
714 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
715 cFYI(1, "Clearing Mid 0x%x - waking up ",
716 mid_entry->mid);
717 task_to_wake = mid_entry->tsk;
718 if (task_to_wake)
719 wake_up_process(task_to_wake);
720 }
721 }
722 spin_unlock(&GlobalMid_Lock);
723 read_unlock(&cifs_tcp_ses_lock);
724 /* 1/8th of sec is more than enough time for them to exit */
725 msleep(125);
726 }
727
728 if (!list_empty(&server->pending_mid_q)) {
729 /* mpx threads have not exited yet give them
730 at least the smb send timeout time for long ops */
731 /* due to delays on oplock break requests, we need
732 to wait at least 45 seconds before giving up
733 on a request getting a response and going ahead
734 and killing cifsd */
735 cFYI(1, "Wait for exit from demultiplex thread");
736 msleep(46000);
737 /* if threads still have not exited they are probably never
738 coming home not much else we can do but free the memory */
739 }
740
741 /* last chance to mark ses pointers invalid
742 if there are any pointing to this (e.g
743 if a crazy root user tried to kill cifsd
744 kernel thread explicitly this might happen) */
745 /* BB: This shouldn't be necessary, see above */
746 read_lock(&cifs_tcp_ses_lock);
747 list_for_each(tmp, &server->smb_ses_list) {
748 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
749 ses->server = NULL;
750 }
751 read_unlock(&cifs_tcp_ses_lock);
752
753 kfree(server->hostname);
754 task_to_wake = xchg(&server->tsk, NULL);
755 kfree(server);
756
757 length = atomic_dec_return(&tcpSesAllocCount);
758 if (length > 0)
759 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
760 GFP_KERNEL);
761
762 /* if server->tsk was NULL then wait for a signal before exiting */
763 if (!task_to_wake) {
764 set_current_state(TASK_INTERRUPTIBLE);
765 while (!signal_pending(current)) {
766 schedule();
767 set_current_state(TASK_INTERRUPTIBLE);
768 }
769 set_current_state(TASK_RUNNING);
770 }
771
772 module_put_and_exit(0);
773 }
774
775 /* extract the host portion of the UNC string */
776 static char *
777 extract_hostname(const char *unc)
778 {
779 const char *src;
780 char *dst, *delim;
781 unsigned int len;
782
783 /* skip double chars at beginning of string */
784 /* BB: check validity of these bytes? */
785 src = unc + 2;
786
787 /* delimiter between hostname and sharename is always '\\' now */
788 delim = strchr(src, '\\');
789 if (!delim)
790 return ERR_PTR(-EINVAL);
791
792 len = delim - src;
793 dst = kmalloc((len + 1), GFP_KERNEL);
794 if (dst == NULL)
795 return ERR_PTR(-ENOMEM);
796
797 memcpy(dst, src, len);
798 dst[len] = '\0';
799
800 return dst;
801 }
802
803 static int
804 cifs_parse_mount_options(char *options, const char *devname,
805 struct smb_vol *vol)
806 {
807 char *value;
808 char *data;
809 unsigned int temp_len, i, j;
810 char separator[2];
811 short int override_uid = -1;
812 short int override_gid = -1;
813 bool uid_specified = false;
814 bool gid_specified = false;
815
816 separator[0] = ',';
817 separator[1] = 0;
818
819 if (Local_System_Name[0] != 0)
820 memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
821 else {
822 char *nodename = utsname()->nodename;
823 int n = strnlen(nodename, 15);
824 memset(vol->source_rfc1001_name, 0x20, 15);
825 for (i = 0; i < n; i++) {
826 /* does not have to be perfect mapping since field is
827 informational, only used for servers that do not support
828 port 445 and it can be overridden at mount time */
829 vol->source_rfc1001_name[i] = toupper(nodename[i]);
830 }
831 }
832 vol->source_rfc1001_name[15] = 0;
833 /* null target name indicates to use *SMBSERVR default called name
834 if we end up sending RFC1001 session initialize */
835 vol->target_rfc1001_name[0] = 0;
836 vol->cred_uid = current_uid();
837 vol->linux_uid = current_uid();
838 vol->linux_gid = current_gid();
839
840 /* default to only allowing write access to owner of the mount */
841 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
842
843 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
844 /* default is always to request posix paths. */
845 vol->posix_paths = 1;
846 /* default to using server inode numbers where available */
847 vol->server_ino = 1;
848
849 /* XXX: default to fsc for testing until mount.cifs pieces are done */
850 vol->fsc = 1;
851
852 if (!options)
853 return 1;
854
855 if (strncmp(options, "sep=", 4) == 0) {
856 if (options[4] != 0) {
857 separator[0] = options[4];
858 options += 5;
859 } else {
860 cFYI(1, "Null separator not allowed");
861 }
862 }
863
864 while ((data = strsep(&options, separator)) != NULL) {
865 if (!*data)
866 continue;
867 if ((value = strchr(data, '=')) != NULL)
868 *value++ = '\0';
869
870 /* Have to parse this before we parse for "user" */
871 if (strnicmp(data, "user_xattr", 10) == 0) {
872 vol->no_xattr = 0;
873 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
874 vol->no_xattr = 1;
875 } else if (strnicmp(data, "user", 4) == 0) {
876 if (!value) {
877 printk(KERN_WARNING
878 "CIFS: invalid or missing username\n");
879 return 1; /* needs_arg; */
880 } else if (!*value) {
881 /* null user, ie anonymous, authentication */
882 vol->nullauth = 1;
883 }
884 if (strnlen(value, 200) < 200) {
885 vol->username = value;
886 } else {
887 printk(KERN_WARNING "CIFS: username too long\n");
888 return 1;
889 }
890 } else if (strnicmp(data, "pass", 4) == 0) {
891 if (!value) {
892 vol->password = NULL;
893 continue;
894 } else if (value[0] == 0) {
895 /* check if string begins with double comma
896 since that would mean the password really
897 does start with a comma, and would not
898 indicate an empty string */
899 if (value[1] != separator[0]) {
900 vol->password = NULL;
901 continue;
902 }
903 }
904 temp_len = strlen(value);
905 /* removed password length check, NTLM passwords
906 can be arbitrarily long */
907
908 /* if comma in password, the string will be
909 prematurely null terminated. Commas in password are
910 specified across the cifs mount interface by a double
911 comma ie ,, and a comma used as in other cases ie ','
912 as a parameter delimiter/separator is single and due
913 to the strsep above is temporarily zeroed. */
914
915 /* NB: password legally can have multiple commas and
916 the only illegal character in a password is null */
917
918 if ((value[temp_len] == 0) &&
919 (value[temp_len+1] == separator[0])) {
920 /* reinsert comma */
921 value[temp_len] = separator[0];
922 temp_len += 2; /* move after second comma */
923 while (value[temp_len] != 0) {
924 if (value[temp_len] == separator[0]) {
925 if (value[temp_len+1] ==
926 separator[0]) {
927 /* skip second comma */
928 temp_len++;
929 } else {
930 /* single comma indicating start
931 of next parm */
932 break;
933 }
934 }
935 temp_len++;
936 }
937 if (value[temp_len] == 0) {
938 options = NULL;
939 } else {
940 value[temp_len] = 0;
941 /* point option to start of next parm */
942 options = value + temp_len + 1;
943 }
944 /* go from value to value + temp_len condensing
945 double commas to singles. Note that this ends up
946 allocating a few bytes too many, which is ok */
947 vol->password = kzalloc(temp_len, GFP_KERNEL);
948 if (vol->password == NULL) {
949 printk(KERN_WARNING "CIFS: no memory "
950 "for password\n");
951 return 1;
952 }
953 for (i = 0, j = 0; i < temp_len; i++, j++) {
954 vol->password[j] = value[i];
955 if (value[i] == separator[0]
956 && value[i+1] == separator[0]) {
957 /* skip second comma */
958 i++;
959 }
960 }
961 vol->password[j] = 0;
962 } else {
963 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
964 if (vol->password == NULL) {
965 printk(KERN_WARNING "CIFS: no memory "
966 "for password\n");
967 return 1;
968 }
969 strcpy(vol->password, value);
970 }
971 } else if (!strnicmp(data, "ip", 2) ||
972 !strnicmp(data, "addr", 4)) {
973 if (!value || !*value) {
974 vol->UNCip = NULL;
975 } else if (strnlen(value, INET6_ADDRSTRLEN) <
976 INET6_ADDRSTRLEN) {
977 vol->UNCip = value;
978 } else {
979 printk(KERN_WARNING "CIFS: ip address "
980 "too long\n");
981 return 1;
982 }
983 } else if (strnicmp(data, "sec", 3) == 0) {
984 if (!value || !*value) {
985 cERROR(1, "no security value specified");
986 continue;
987 } else if (strnicmp(value, "krb5i", 5) == 0) {
988 vol->secFlg |= CIFSSEC_MAY_KRB5 |
989 CIFSSEC_MUST_SIGN;
990 } else if (strnicmp(value, "krb5p", 5) == 0) {
991 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
992 CIFSSEC_MAY_KRB5; */
993 cERROR(1, "Krb5 cifs privacy not supported");
994 return 1;
995 } else if (strnicmp(value, "krb5", 4) == 0) {
996 vol->secFlg |= CIFSSEC_MAY_KRB5;
997 #ifdef CONFIG_CIFS_EXPERIMENTAL
998 } else if (strnicmp(value, "ntlmsspi", 8) == 0) {
999 vol->secFlg |= CIFSSEC_MAY_NTLMSSP |
1000 CIFSSEC_MUST_SIGN;
1001 } else if (strnicmp(value, "ntlmssp", 7) == 0) {
1002 vol->secFlg |= CIFSSEC_MAY_NTLMSSP;
1003 #endif
1004 } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
1005 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
1006 CIFSSEC_MUST_SIGN;
1007 } else if (strnicmp(value, "ntlmv2", 6) == 0) {
1008 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
1009 } else if (strnicmp(value, "ntlmi", 5) == 0) {
1010 vol->secFlg |= CIFSSEC_MAY_NTLM |
1011 CIFSSEC_MUST_SIGN;
1012 } else if (strnicmp(value, "ntlm", 4) == 0) {
1013 /* ntlm is default so can be turned off too */
1014 vol->secFlg |= CIFSSEC_MAY_NTLM;
1015 } else if (strnicmp(value, "nontlm", 6) == 0) {
1016 /* BB is there a better way to do this? */
1017 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
1018 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1019 } else if (strnicmp(value, "lanman", 6) == 0) {
1020 vol->secFlg |= CIFSSEC_MAY_LANMAN;
1021 #endif
1022 } else if (strnicmp(value, "none", 4) == 0) {
1023 vol->nullauth = 1;
1024 } else {
1025 cERROR(1, "bad security option: %s", value);
1026 return 1;
1027 }
1028 } else if ((strnicmp(data, "unc", 3) == 0)
1029 || (strnicmp(data, "target", 6) == 0)
1030 || (strnicmp(data, "path", 4) == 0)) {
1031 if (!value || !*value) {
1032 printk(KERN_WARNING "CIFS: invalid path to "
1033 "network resource\n");
1034 return 1; /* needs_arg; */
1035 }
1036 if ((temp_len = strnlen(value, 300)) < 300) {
1037 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1038 if (vol->UNC == NULL)
1039 return 1;
1040 strcpy(vol->UNC, value);
1041 if (strncmp(vol->UNC, "//", 2) == 0) {
1042 vol->UNC[0] = '\\';
1043 vol->UNC[1] = '\\';
1044 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1045 printk(KERN_WARNING
1046 "CIFS: UNC Path does not begin "
1047 "with // or \\\\ \n");
1048 return 1;
1049 }
1050 } else {
1051 printk(KERN_WARNING "CIFS: UNC name too long\n");
1052 return 1;
1053 }
1054 } else if ((strnicmp(data, "domain", 3) == 0)
1055 || (strnicmp(data, "workgroup", 5) == 0)) {
1056 if (!value || !*value) {
1057 printk(KERN_WARNING "CIFS: invalid domain name\n");
1058 return 1; /* needs_arg; */
1059 }
1060 /* BB are there cases in which a comma can be valid in
1061 a domain name and need special handling? */
1062 if (strnlen(value, 256) < 256) {
1063 vol->domainname = value;
1064 cFYI(1, "Domain name set");
1065 } else {
1066 printk(KERN_WARNING "CIFS: domain name too "
1067 "long\n");
1068 return 1;
1069 }
1070 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1071 if (!value || !*value) {
1072 printk(KERN_WARNING
1073 "CIFS: invalid path prefix\n");
1074 return 1; /* needs_argument */
1075 }
1076 if ((temp_len = strnlen(value, 1024)) < 1024) {
1077 if (value[0] != '/')
1078 temp_len++; /* missing leading slash */
1079 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1080 if (vol->prepath == NULL)
1081 return 1;
1082 if (value[0] != '/') {
1083 vol->prepath[0] = '/';
1084 strcpy(vol->prepath+1, value);
1085 } else
1086 strcpy(vol->prepath, value);
1087 cFYI(1, "prefix path %s", vol->prepath);
1088 } else {
1089 printk(KERN_WARNING "CIFS: prefix too long\n");
1090 return 1;
1091 }
1092 } else if (strnicmp(data, "iocharset", 9) == 0) {
1093 if (!value || !*value) {
1094 printk(KERN_WARNING "CIFS: invalid iocharset "
1095 "specified\n");
1096 return 1; /* needs_arg; */
1097 }
1098 if (strnlen(value, 65) < 65) {
1099 if (strnicmp(value, "default", 7))
1100 vol->iocharset = value;
1101 /* if iocharset not set then load_nls_default
1102 is used by caller */
1103 cFYI(1, "iocharset set to %s", value);
1104 } else {
1105 printk(KERN_WARNING "CIFS: iocharset name "
1106 "too long.\n");
1107 return 1;
1108 }
1109 } else if (!strnicmp(data, "uid", 3) && value && *value) {
1110 vol->linux_uid = simple_strtoul(value, &value, 0);
1111 uid_specified = true;
1112 } else if (!strnicmp(data, "forceuid", 8)) {
1113 override_uid = 1;
1114 } else if (!strnicmp(data, "noforceuid", 10)) {
1115 override_uid = 0;
1116 } else if (!strnicmp(data, "gid", 3) && value && *value) {
1117 vol->linux_gid = simple_strtoul(value, &value, 0);
1118 gid_specified = true;
1119 } else if (!strnicmp(data, "forcegid", 8)) {
1120 override_gid = 1;
1121 } else if (!strnicmp(data, "noforcegid", 10)) {
1122 override_gid = 0;
1123 } else if (strnicmp(data, "file_mode", 4) == 0) {
1124 if (value && *value) {
1125 vol->file_mode =
1126 simple_strtoul(value, &value, 0);
1127 }
1128 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1129 if (value && *value) {
1130 vol->dir_mode =
1131 simple_strtoul(value, &value, 0);
1132 }
1133 } else if (strnicmp(data, "dirmode", 4) == 0) {
1134 if (value && *value) {
1135 vol->dir_mode =
1136 simple_strtoul(value, &value, 0);
1137 }
1138 } else if (strnicmp(data, "port", 4) == 0) {
1139 if (value && *value) {
1140 vol->port =
1141 simple_strtoul(value, &value, 0);
1142 }
1143 } else if (strnicmp(data, "rsize", 5) == 0) {
1144 if (value && *value) {
1145 vol->rsize =
1146 simple_strtoul(value, &value, 0);
1147 }
1148 } else if (strnicmp(data, "wsize", 5) == 0) {
1149 if (value && *value) {
1150 vol->wsize =
1151 simple_strtoul(value, &value, 0);
1152 }
1153 } else if (strnicmp(data, "sockopt", 5) == 0) {
1154 if (!value || !*value) {
1155 cERROR(1, "no socket option specified");
1156 continue;
1157 } else if (strnicmp(value, "TCP_NODELAY", 11) == 0) {
1158 vol->sockopt_tcp_nodelay = 1;
1159 }
1160 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1161 if (!value || !*value || (*value == ' ')) {
1162 cFYI(1, "invalid (empty) netbiosname");
1163 } else {
1164 memset(vol->source_rfc1001_name, 0x20, 15);
1165 for (i = 0; i < 15; i++) {
1166 /* BB are there cases in which a comma can be
1167 valid in this workstation netbios name (and need
1168 special handling)? */
1169
1170 /* We do not uppercase netbiosname for user */
1171 if (value[i] == 0)
1172 break;
1173 else
1174 vol->source_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: netbiosname"
1181 " longer than 15 truncated.\n");
1182 }
1183 } else if (strnicmp(data, "servern", 7) == 0) {
1184 /* servernetbiosname specified override *SMBSERVER */
1185 if (!value || !*value || (*value == ' ')) {
1186 cFYI(1, "empty server netbiosname specified");
1187 } else {
1188 /* last byte, type, is 0x20 for servr type */
1189 memset(vol->target_rfc1001_name, 0x20, 16);
1190
1191 for (i = 0; i < 15; i++) {
1192 /* BB are there cases in which a comma can be
1193 valid in this workstation netbios name
1194 (and need special handling)? */
1195
1196 /* user or mount helper must uppercase
1197 the netbiosname */
1198 if (value[i] == 0)
1199 break;
1200 else
1201 vol->target_rfc1001_name[i] =
1202 value[i];
1203 }
1204 /* The string has 16th byte zero still from
1205 set at top of the function */
1206 if ((i == 15) && (value[i] != 0))
1207 printk(KERN_WARNING "CIFS: server net"
1208 "biosname longer than 15 truncated.\n");
1209 }
1210 } else if (strnicmp(data, "credentials", 4) == 0) {
1211 /* ignore */
1212 } else if (strnicmp(data, "version", 3) == 0) {
1213 /* ignore */
1214 } else if (strnicmp(data, "guest", 5) == 0) {
1215 /* ignore */
1216 } else if (strnicmp(data, "rw", 2) == 0) {
1217 /* ignore */
1218 } else if (strnicmp(data, "ro", 2) == 0) {
1219 /* ignore */
1220 } else if (strnicmp(data, "noblocksend", 11) == 0) {
1221 vol->noblocksnd = 1;
1222 } else if (strnicmp(data, "noautotune", 10) == 0) {
1223 vol->noautotune = 1;
1224 } else if ((strnicmp(data, "suid", 4) == 0) ||
1225 (strnicmp(data, "nosuid", 6) == 0) ||
1226 (strnicmp(data, "exec", 4) == 0) ||
1227 (strnicmp(data, "noexec", 6) == 0) ||
1228 (strnicmp(data, "nodev", 5) == 0) ||
1229 (strnicmp(data, "noauto", 6) == 0) ||
1230 (strnicmp(data, "dev", 3) == 0)) {
1231 /* The mount tool or mount.cifs helper (if present)
1232 uses these opts to set flags, and the flags are read
1233 by the kernel vfs layer before we get here (ie
1234 before read super) so there is no point trying to
1235 parse these options again and set anything and it
1236 is ok to just ignore them */
1237 continue;
1238 } else if (strnicmp(data, "hard", 4) == 0) {
1239 vol->retry = 1;
1240 } else if (strnicmp(data, "soft", 4) == 0) {
1241 vol->retry = 0;
1242 } else if (strnicmp(data, "perm", 4) == 0) {
1243 vol->noperm = 0;
1244 } else if (strnicmp(data, "noperm", 6) == 0) {
1245 vol->noperm = 1;
1246 } else if (strnicmp(data, "mapchars", 8) == 0) {
1247 vol->remap = 1;
1248 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1249 vol->remap = 0;
1250 } else if (strnicmp(data, "sfu", 3) == 0) {
1251 vol->sfu_emul = 1;
1252 } else if (strnicmp(data, "nosfu", 5) == 0) {
1253 vol->sfu_emul = 0;
1254 } else if (strnicmp(data, "nodfs", 5) == 0) {
1255 vol->nodfs = 1;
1256 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1257 vol->posix_paths = 1;
1258 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1259 vol->posix_paths = 0;
1260 } else if (strnicmp(data, "nounix", 6) == 0) {
1261 vol->no_linux_ext = 1;
1262 } else if (strnicmp(data, "nolinux", 7) == 0) {
1263 vol->no_linux_ext = 1;
1264 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1265 (strnicmp(data, "ignorecase", 10) == 0)) {
1266 vol->nocase = 1;
1267 } else if (strnicmp(data, "mand", 4) == 0) {
1268 /* ignore */
1269 } else if (strnicmp(data, "nomand", 6) == 0) {
1270 /* ignore */
1271 } else if (strnicmp(data, "_netdev", 7) == 0) {
1272 /* ignore */
1273 } else if (strnicmp(data, "brl", 3) == 0) {
1274 vol->nobrl = 0;
1275 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1276 (strnicmp(data, "nolock", 6) == 0)) {
1277 vol->nobrl = 1;
1278 /* turn off mandatory locking in mode
1279 if remote locking is turned off since the
1280 local vfs will do advisory */
1281 if (vol->file_mode ==
1282 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1283 vol->file_mode = S_IALLUGO;
1284 } else if (strnicmp(data, "forcemandatorylock", 9) == 0) {
1285 /* will take the shorter form "forcemand" as well */
1286 /* This mount option will force use of mandatory
1287 (DOS/Windows style) byte range locks, instead of
1288 using posix advisory byte range locks, even if the
1289 Unix extensions are available and posix locks would
1290 be supported otherwise. If Unix extensions are not
1291 negotiated this has no effect since mandatory locks
1292 would be used (mandatory locks is all that those
1293 those servers support) */
1294 vol->mand_lock = 1;
1295 } else if (strnicmp(data, "setuids", 7) == 0) {
1296 vol->setuids = 1;
1297 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1298 vol->setuids = 0;
1299 } else if (strnicmp(data, "dynperm", 7) == 0) {
1300 vol->dynperm = true;
1301 } else if (strnicmp(data, "nodynperm", 9) == 0) {
1302 vol->dynperm = false;
1303 } else if (strnicmp(data, "nohard", 6) == 0) {
1304 vol->retry = 0;
1305 } else if (strnicmp(data, "nosoft", 6) == 0) {
1306 vol->retry = 1;
1307 } else if (strnicmp(data, "nointr", 6) == 0) {
1308 vol->intr = 0;
1309 } else if (strnicmp(data, "intr", 4) == 0) {
1310 vol->intr = 1;
1311 } else if (strnicmp(data, "nostrictsync", 12) == 0) {
1312 vol->nostrictsync = 1;
1313 } else if (strnicmp(data, "strictsync", 10) == 0) {
1314 vol->nostrictsync = 0;
1315 } else if (strnicmp(data, "serverino", 7) == 0) {
1316 vol->server_ino = 1;
1317 } else if (strnicmp(data, "noserverino", 9) == 0) {
1318 vol->server_ino = 0;
1319 } else if (strnicmp(data, "cifsacl", 7) == 0) {
1320 vol->cifs_acl = 1;
1321 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1322 vol->cifs_acl = 0;
1323 } else if (strnicmp(data, "acl", 3) == 0) {
1324 vol->no_psx_acl = 0;
1325 } else if (strnicmp(data, "noacl", 5) == 0) {
1326 vol->no_psx_acl = 1;
1327 #ifdef CONFIG_CIFS_EXPERIMENTAL
1328 } else if (strnicmp(data, "locallease", 6) == 0) {
1329 vol->local_lease = 1;
1330 #endif
1331 } else if (strnicmp(data, "sign", 4) == 0) {
1332 vol->secFlg |= CIFSSEC_MUST_SIGN;
1333 } else if (strnicmp(data, "seal", 4) == 0) {
1334 /* we do not do the following in secFlags because seal
1335 is a per tree connection (mount) not a per socket
1336 or per-smb connection option in the protocol */
1337 /* vol->secFlg |= CIFSSEC_MUST_SEAL; */
1338 vol->seal = 1;
1339 } else if (strnicmp(data, "direct", 6) == 0) {
1340 vol->direct_io = 1;
1341 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
1342 vol->direct_io = 1;
1343 } else if (strnicmp(data, "noac", 4) == 0) {
1344 printk(KERN_WARNING "CIFS: Mount option noac not "
1345 "supported. Instead set "
1346 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1347 } else if (strnicmp(data, "fsc", 3) == 0) {
1348 vol->fsc = true;
1349 } else
1350 printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1351 data);
1352 }
1353 if (vol->UNC == NULL) {
1354 if (devname == NULL) {
1355 printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1356 "target\n");
1357 return 1;
1358 }
1359 if ((temp_len = strnlen(devname, 300)) < 300) {
1360 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1361 if (vol->UNC == NULL)
1362 return 1;
1363 strcpy(vol->UNC, devname);
1364 if (strncmp(vol->UNC, "//", 2) == 0) {
1365 vol->UNC[0] = '\\';
1366 vol->UNC[1] = '\\';
1367 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1368 printk(KERN_WARNING "CIFS: UNC Path does not "
1369 "begin with // or \\\\ \n");
1370 return 1;
1371 }
1372 value = strpbrk(vol->UNC+2, "/\\");
1373 if (value)
1374 *value = '\\';
1375 } else {
1376 printk(KERN_WARNING "CIFS: UNC name too long\n");
1377 return 1;
1378 }
1379 }
1380 if (vol->UNCip == NULL)
1381 vol->UNCip = &vol->UNC[2];
1382
1383 if (uid_specified)
1384 vol->override_uid = override_uid;
1385 else if (override_uid == 1)
1386 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1387 "specified with no uid= option.\n");
1388
1389 if (gid_specified)
1390 vol->override_gid = override_gid;
1391 else if (override_gid == 1)
1392 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1393 "specified with no gid= option.\n");
1394
1395 return 0;
1396 }
1397
1398 static bool
1399 match_address(struct TCP_Server_Info *server, struct sockaddr *addr)
1400 {
1401 struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
1402 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
1403
1404 switch (addr->sa_family) {
1405 case AF_INET:
1406 if (addr4->sin_addr.s_addr !=
1407 server->addr.sockAddr.sin_addr.s_addr)
1408 return false;
1409 if (addr4->sin_port &&
1410 addr4->sin_port != server->addr.sockAddr.sin_port)
1411 return false;
1412 break;
1413 case AF_INET6:
1414 if (!ipv6_addr_equal(&addr6->sin6_addr,
1415 &server->addr.sockAddr6.sin6_addr))
1416 return false;
1417 if (addr6->sin6_scope_id !=
1418 server->addr.sockAddr6.sin6_scope_id)
1419 return false;
1420 if (addr6->sin6_port &&
1421 addr6->sin6_port != server->addr.sockAddr6.sin6_port)
1422 return false;
1423 break;
1424 }
1425
1426 return true;
1427 }
1428
1429 static bool
1430 match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
1431 {
1432 unsigned int secFlags;
1433
1434 if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
1435 secFlags = vol->secFlg;
1436 else
1437 secFlags = global_secflags | vol->secFlg;
1438
1439 switch (server->secType) {
1440 case LANMAN:
1441 if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT)))
1442 return false;
1443 break;
1444 case NTLMv2:
1445 if (!(secFlags & CIFSSEC_MAY_NTLMV2))
1446 return false;
1447 break;
1448 case NTLM:
1449 if (!(secFlags & CIFSSEC_MAY_NTLM))
1450 return false;
1451 break;
1452 case Kerberos:
1453 if (!(secFlags & CIFSSEC_MAY_KRB5))
1454 return false;
1455 break;
1456 case RawNTLMSSP:
1457 if (!(secFlags & CIFSSEC_MAY_NTLMSSP))
1458 return false;
1459 break;
1460 default:
1461 /* shouldn't happen */
1462 return false;
1463 }
1464
1465 /* now check if signing mode is acceptible */
1466 if ((secFlags & CIFSSEC_MAY_SIGN) == 0 &&
1467 (server->secMode & SECMODE_SIGN_REQUIRED))
1468 return false;
1469 else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) &&
1470 (server->secMode &
1471 (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0)
1472 return false;
1473
1474 return true;
1475 }
1476
1477 static struct TCP_Server_Info *
1478 cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol)
1479 {
1480 struct TCP_Server_Info *server;
1481
1482 write_lock(&cifs_tcp_ses_lock);
1483 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
1484 /*
1485 * the demux thread can exit on its own while still in CifsNew
1486 * so don't accept any sockets in that state. Since the
1487 * tcpStatus never changes back to CifsNew it's safe to check
1488 * for this without a lock.
1489 */
1490 if (server->tcpStatus == CifsNew)
1491 continue;
1492
1493 if (!match_address(server, addr))
1494 continue;
1495
1496 if (!match_security(server, vol))
1497 continue;
1498
1499 ++server->srv_count;
1500 write_unlock(&cifs_tcp_ses_lock);
1501 cFYI(1, "Existing tcp session with server found");
1502 return server;
1503 }
1504 write_unlock(&cifs_tcp_ses_lock);
1505 return NULL;
1506 }
1507
1508 static void
1509 cifs_put_tcp_session(struct TCP_Server_Info *server)
1510 {
1511 struct task_struct *task;
1512
1513 write_lock(&cifs_tcp_ses_lock);
1514 if (--server->srv_count > 0) {
1515 write_unlock(&cifs_tcp_ses_lock);
1516 return;
1517 }
1518
1519 list_del_init(&server->tcp_ses_list);
1520 write_unlock(&cifs_tcp_ses_lock);
1521
1522 spin_lock(&GlobalMid_Lock);
1523 server->tcpStatus = CifsExiting;
1524 spin_unlock(&GlobalMid_Lock);
1525
1526 cifs_fscache_release_client_cookie(server);
1527
1528 task = xchg(&server->tsk, NULL);
1529 if (task)
1530 force_sig(SIGKILL, task);
1531 }
1532
1533 static struct TCP_Server_Info *
1534 cifs_get_tcp_session(struct smb_vol *volume_info)
1535 {
1536 struct TCP_Server_Info *tcp_ses = NULL;
1537 struct sockaddr_storage addr;
1538 struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
1539 struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
1540 int rc;
1541
1542 memset(&addr, 0, sizeof(struct sockaddr_storage));
1543
1544 cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip);
1545
1546 if (volume_info->UNCip && volume_info->UNC) {
1547 rc = cifs_fill_sockaddr((struct sockaddr *)&addr,
1548 volume_info->UNCip,
1549 volume_info->port);
1550 if (!rc) {
1551 /* we failed translating address */
1552 rc = -EINVAL;
1553 goto out_err;
1554 }
1555 } else if (volume_info->UNCip) {
1556 /* BB using ip addr as tcp_ses name to connect to the
1557 DFS root below */
1558 cERROR(1, "Connecting to DFS root not implemented yet");
1559 rc = -EINVAL;
1560 goto out_err;
1561 } else /* which tcp_sess DFS root would we conect to */ {
1562 cERROR(1, "CIFS mount error: No UNC path (e.g. -o "
1563 "unc=//192.168.1.100/public) specified");
1564 rc = -EINVAL;
1565 goto out_err;
1566 }
1567
1568 /* see if we already have a matching tcp_ses */
1569 tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info);
1570 if (tcp_ses)
1571 return tcp_ses;
1572
1573 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1574 if (!tcp_ses) {
1575 rc = -ENOMEM;
1576 goto out_err;
1577 }
1578
1579 tcp_ses->hostname = extract_hostname(volume_info->UNC);
1580 if (IS_ERR(tcp_ses->hostname)) {
1581 rc = PTR_ERR(tcp_ses->hostname);
1582 goto out_err;
1583 }
1584
1585 tcp_ses->noblocksnd = volume_info->noblocksnd;
1586 tcp_ses->noautotune = volume_info->noautotune;
1587 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
1588 atomic_set(&tcp_ses->inFlight, 0);
1589 init_waitqueue_head(&tcp_ses->response_q);
1590 init_waitqueue_head(&tcp_ses->request_q);
1591 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
1592 mutex_init(&tcp_ses->srv_mutex);
1593 memcpy(tcp_ses->workstation_RFC1001_name,
1594 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1595 memcpy(tcp_ses->server_RFC1001_name,
1596 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1597 tcp_ses->sequence_number = 0;
1598 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
1599 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
1600
1601 /*
1602 * at this point we are the only ones with the pointer
1603 * to the struct since the kernel thread not created yet
1604 * no need to spinlock this init of tcpStatus or srv_count
1605 */
1606 tcp_ses->tcpStatus = CifsNew;
1607 ++tcp_ses->srv_count;
1608
1609 if (addr.ss_family == AF_INET6) {
1610 cFYI(1, "attempting ipv6 connect");
1611 /* BB should we allow ipv6 on port 139? */
1612 /* other OS never observed in Wild doing 139 with v6 */
1613 memcpy(&tcp_ses->addr.sockAddr6, sin_server6,
1614 sizeof(struct sockaddr_in6));
1615 rc = ipv6_connect(tcp_ses);
1616 } else {
1617 memcpy(&tcp_ses->addr.sockAddr, sin_server,
1618 sizeof(struct sockaddr_in));
1619 rc = ipv4_connect(tcp_ses);
1620 }
1621 if (rc < 0) {
1622 cERROR(1, "Error connecting to socket. Aborting operation");
1623 goto out_err;
1624 }
1625
1626 /*
1627 * since we're in a cifs function already, we know that
1628 * this will succeed. No need for try_module_get().
1629 */
1630 __module_get(THIS_MODULE);
1631 tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread,
1632 tcp_ses, "cifsd");
1633 if (IS_ERR(tcp_ses->tsk)) {
1634 rc = PTR_ERR(tcp_ses->tsk);
1635 cERROR(1, "error %d create cifsd thread", rc);
1636 module_put(THIS_MODULE);
1637 goto out_err;
1638 }
1639
1640 /* thread spawned, put it on the list */
1641 write_lock(&cifs_tcp_ses_lock);
1642 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
1643 write_unlock(&cifs_tcp_ses_lock);
1644
1645 cifs_fscache_get_client_cookie(tcp_ses);
1646
1647 return tcp_ses;
1648
1649 out_err:
1650 if (tcp_ses) {
1651 if (!IS_ERR(tcp_ses->hostname))
1652 kfree(tcp_ses->hostname);
1653 if (tcp_ses->ssocket)
1654 sock_release(tcp_ses->ssocket);
1655 kfree(tcp_ses);
1656 }
1657 return ERR_PTR(rc);
1658 }
1659
1660 static struct cifsSesInfo *
1661 cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
1662 {
1663 struct cifsSesInfo *ses;
1664
1665 write_lock(&cifs_tcp_ses_lock);
1666 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
1667 switch (server->secType) {
1668 case Kerberos:
1669 if (vol->cred_uid != ses->cred_uid)
1670 continue;
1671 break;
1672 default:
1673 /* anything else takes username/password */
1674 if (strncmp(ses->userName, vol->username,
1675 MAX_USERNAME_SIZE))
1676 continue;
1677 if (strlen(vol->username) != 0 &&
1678 strncmp(ses->password, vol->password,
1679 MAX_PASSWORD_SIZE))
1680 continue;
1681 }
1682 ++ses->ses_count;
1683 write_unlock(&cifs_tcp_ses_lock);
1684 return ses;
1685 }
1686 write_unlock(&cifs_tcp_ses_lock);
1687 return NULL;
1688 }
1689
1690 static void
1691 cifs_put_smb_ses(struct cifsSesInfo *ses)
1692 {
1693 int xid;
1694 struct TCP_Server_Info *server = ses->server;
1695
1696 cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count);
1697 write_lock(&cifs_tcp_ses_lock);
1698 if (--ses->ses_count > 0) {
1699 write_unlock(&cifs_tcp_ses_lock);
1700 return;
1701 }
1702
1703 list_del_init(&ses->smb_ses_list);
1704 write_unlock(&cifs_tcp_ses_lock);
1705
1706 if (ses->status == CifsGood) {
1707 xid = GetXid();
1708 CIFSSMBLogoff(xid, ses);
1709 _FreeXid(xid);
1710 }
1711 sesInfoFree(ses);
1712 cifs_put_tcp_session(server);
1713 }
1714
1715 static struct cifsSesInfo *
1716 cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
1717 {
1718 int rc = -ENOMEM, xid;
1719 struct cifsSesInfo *ses;
1720
1721 xid = GetXid();
1722
1723 ses = cifs_find_smb_ses(server, volume_info);
1724 if (ses) {
1725 cFYI(1, "Existing smb sess found (status=%d)", ses->status);
1726
1727 /* existing SMB ses has a server reference already */
1728 cifs_put_tcp_session(server);
1729
1730 mutex_lock(&ses->session_mutex);
1731 rc = cifs_negotiate_protocol(xid, ses);
1732 if (rc) {
1733 mutex_unlock(&ses->session_mutex);
1734 /* problem -- put our ses reference */
1735 cifs_put_smb_ses(ses);
1736 FreeXid(xid);
1737 return ERR_PTR(rc);
1738 }
1739 if (ses->need_reconnect) {
1740 cFYI(1, "Session needs reconnect");
1741 rc = cifs_setup_session(xid, ses,
1742 volume_info->local_nls);
1743 if (rc) {
1744 mutex_unlock(&ses->session_mutex);
1745 /* problem -- put our reference */
1746 cifs_put_smb_ses(ses);
1747 FreeXid(xid);
1748 return ERR_PTR(rc);
1749 }
1750 }
1751 mutex_unlock(&ses->session_mutex);
1752 FreeXid(xid);
1753 return ses;
1754 }
1755
1756 cFYI(1, "Existing smb sess not found");
1757 ses = sesInfoAlloc();
1758 if (ses == NULL)
1759 goto get_ses_fail;
1760
1761 /* new SMB session uses our server ref */
1762 ses->server = server;
1763 if (server->addr.sockAddr6.sin6_family == AF_INET6)
1764 sprintf(ses->serverName, "%pI6",
1765 &server->addr.sockAddr6.sin6_addr);
1766 else
1767 sprintf(ses->serverName, "%pI4",
1768 &server->addr.sockAddr.sin_addr.s_addr);
1769
1770 if (volume_info->username)
1771 strncpy(ses->userName, volume_info->username,
1772 MAX_USERNAME_SIZE);
1773
1774 /* volume_info->password freed at unmount */
1775 if (volume_info->password) {
1776 ses->password = kstrdup(volume_info->password, GFP_KERNEL);
1777 if (!ses->password)
1778 goto get_ses_fail;
1779 }
1780 if (volume_info->domainname) {
1781 int len = strlen(volume_info->domainname);
1782 ses->domainName = kmalloc(len + 1, GFP_KERNEL);
1783 if (ses->domainName)
1784 strcpy(ses->domainName, volume_info->domainname);
1785 }
1786 ses->cred_uid = volume_info->cred_uid;
1787 ses->linux_uid = volume_info->linux_uid;
1788 ses->overrideSecFlg = volume_info->secFlg;
1789
1790 mutex_lock(&ses->session_mutex);
1791 rc = cifs_negotiate_protocol(xid, ses);
1792 if (!rc)
1793 rc = cifs_setup_session(xid, ses, volume_info->local_nls);
1794 mutex_unlock(&ses->session_mutex);
1795 if (rc)
1796 goto get_ses_fail;
1797
1798 /* success, put it on the list */
1799 write_lock(&cifs_tcp_ses_lock);
1800 list_add(&ses->smb_ses_list, &server->smb_ses_list);
1801 write_unlock(&cifs_tcp_ses_lock);
1802
1803 FreeXid(xid);
1804 return ses;
1805
1806 get_ses_fail:
1807 sesInfoFree(ses);
1808 FreeXid(xid);
1809 return ERR_PTR(rc);
1810 }
1811
1812 static struct cifsTconInfo *
1813 cifs_find_tcon(struct cifsSesInfo *ses, const char *unc)
1814 {
1815 struct list_head *tmp;
1816 struct cifsTconInfo *tcon;
1817
1818 write_lock(&cifs_tcp_ses_lock);
1819 list_for_each(tmp, &ses->tcon_list) {
1820 tcon = list_entry(tmp, struct cifsTconInfo, tcon_list);
1821 if (tcon->tidStatus == CifsExiting)
1822 continue;
1823 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
1824 continue;
1825
1826 ++tcon->tc_count;
1827 write_unlock(&cifs_tcp_ses_lock);
1828 return tcon;
1829 }
1830 write_unlock(&cifs_tcp_ses_lock);
1831 return NULL;
1832 }
1833
1834 static void
1835 cifs_put_tcon(struct cifsTconInfo *tcon)
1836 {
1837 int xid;
1838 struct cifsSesInfo *ses = tcon->ses;
1839
1840 cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count);
1841 write_lock(&cifs_tcp_ses_lock);
1842 if (--tcon->tc_count > 0) {
1843 write_unlock(&cifs_tcp_ses_lock);
1844 return;
1845 }
1846
1847 list_del_init(&tcon->tcon_list);
1848 write_unlock(&cifs_tcp_ses_lock);
1849
1850 xid = GetXid();
1851 CIFSSMBTDis(xid, tcon);
1852 _FreeXid(xid);
1853
1854 cifs_fscache_release_super_cookie(tcon);
1855 tconInfoFree(tcon);
1856 cifs_put_smb_ses(ses);
1857 }
1858
1859 static struct cifsTconInfo *
1860 cifs_get_tcon(struct cifsSesInfo *ses, struct smb_vol *volume_info)
1861 {
1862 int rc, xid;
1863 struct cifsTconInfo *tcon;
1864
1865 tcon = cifs_find_tcon(ses, volume_info->UNC);
1866 if (tcon) {
1867 cFYI(1, "Found match on UNC path");
1868 /* existing tcon already has a reference */
1869 cifs_put_smb_ses(ses);
1870 if (tcon->seal != volume_info->seal)
1871 cERROR(1, "transport encryption setting "
1872 "conflicts with existing tid");
1873 return tcon;
1874 }
1875
1876 tcon = tconInfoAlloc();
1877 if (tcon == NULL) {
1878 rc = -ENOMEM;
1879 goto out_fail;
1880 }
1881
1882 tcon->ses = ses;
1883 if (volume_info->password) {
1884 tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
1885 if (!tcon->password) {
1886 rc = -ENOMEM;
1887 goto out_fail;
1888 }
1889 }
1890
1891 if (strchr(volume_info->UNC + 3, '\\') == NULL
1892 && strchr(volume_info->UNC + 3, '/') == NULL) {
1893 cERROR(1, "Missing share name");
1894 rc = -ENODEV;
1895 goto out_fail;
1896 }
1897
1898 /* BB Do we need to wrap session_mutex around
1899 * this TCon call and Unix SetFS as
1900 * we do on SessSetup and reconnect? */
1901 xid = GetXid();
1902 rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls);
1903 FreeXid(xid);
1904 cFYI(1, "CIFS Tcon rc = %d", rc);
1905 if (rc)
1906 goto out_fail;
1907
1908 if (volume_info->nodfs) {
1909 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
1910 cFYI(1, "DFS disabled (%d)", tcon->Flags);
1911 }
1912 tcon->seal = volume_info->seal;
1913 /* we can have only one retry value for a connection
1914 to a share so for resources mounted more than once
1915 to the same server share the last value passed in
1916 for the retry flag is used */
1917 tcon->retry = volume_info->retry;
1918 tcon->nocase = volume_info->nocase;
1919 tcon->local_lease = volume_info->local_lease;
1920
1921 write_lock(&cifs_tcp_ses_lock);
1922 list_add(&tcon->tcon_list, &ses->tcon_list);
1923 write_unlock(&cifs_tcp_ses_lock);
1924
1925 cifs_fscache_get_super_cookie(tcon);
1926
1927 return tcon;
1928
1929 out_fail:
1930 tconInfoFree(tcon);
1931 return ERR_PTR(rc);
1932 }
1933
1934
1935 int
1936 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
1937 const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
1938 struct dfs_info3_param **preferrals, int remap)
1939 {
1940 char *temp_unc;
1941 int rc = 0;
1942
1943 *pnum_referrals = 0;
1944 *preferrals = NULL;
1945
1946 if (pSesInfo->ipc_tid == 0) {
1947 temp_unc = kmalloc(2 /* for slashes */ +
1948 strnlen(pSesInfo->serverName,
1949 SERVER_NAME_LEN_WITH_NULL * 2)
1950 + 1 + 4 /* slash IPC$ */ + 2,
1951 GFP_KERNEL);
1952 if (temp_unc == NULL)
1953 return -ENOMEM;
1954 temp_unc[0] = '\\';
1955 temp_unc[1] = '\\';
1956 strcpy(temp_unc + 2, pSesInfo->serverName);
1957 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1958 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1959 cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid);
1960 kfree(temp_unc);
1961 }
1962 if (rc == 0)
1963 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1964 pnum_referrals, nls_codepage, remap);
1965 /* BB map targetUNCs to dfs_info3 structures, here or
1966 in CIFSGetDFSRefer BB */
1967
1968 return rc;
1969 }
1970
1971 #ifdef CONFIG_DEBUG_LOCK_ALLOC
1972 static struct lock_class_key cifs_key[2];
1973 static struct lock_class_key cifs_slock_key[2];
1974
1975 static inline void
1976 cifs_reclassify_socket4(struct socket *sock)
1977 {
1978 struct sock *sk = sock->sk;
1979 BUG_ON(sock_owned_by_user(sk));
1980 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
1981 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
1982 }
1983
1984 static inline void
1985 cifs_reclassify_socket6(struct socket *sock)
1986 {
1987 struct sock *sk = sock->sk;
1988 BUG_ON(sock_owned_by_user(sk));
1989 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
1990 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
1991 }
1992 #else
1993 static inline void
1994 cifs_reclassify_socket4(struct socket *sock)
1995 {
1996 }
1997
1998 static inline void
1999 cifs_reclassify_socket6(struct socket *sock)
2000 {
2001 }
2002 #endif
2003
2004 /* See RFC1001 section 14 on representation of Netbios names */
2005 static void rfc1002mangle(char *target, char *source, unsigned int length)
2006 {
2007 unsigned int i, j;
2008
2009 for (i = 0, j = 0; i < (length); i++) {
2010 /* mask a nibble at a time and encode */
2011 target[j] = 'A' + (0x0F & (source[i] >> 4));
2012 target[j+1] = 'A' + (0x0F & source[i]);
2013 j += 2;
2014 }
2015
2016 }
2017
2018
2019 static int
2020 ipv4_connect(struct TCP_Server_Info *server)
2021 {
2022 int rc = 0;
2023 int val;
2024 bool connected = false;
2025 __be16 orig_port = 0;
2026 struct socket *socket = server->ssocket;
2027
2028 if (socket == NULL) {
2029 rc = sock_create_kern(PF_INET, SOCK_STREAM,
2030 IPPROTO_TCP, &socket);
2031 if (rc < 0) {
2032 cERROR(1, "Error %d creating socket", rc);
2033 return rc;
2034 }
2035
2036 /* BB other socket options to set KEEPALIVE, NODELAY? */
2037 cFYI(1, "Socket created");
2038 server->ssocket = socket;
2039 socket->sk->sk_allocation = GFP_NOFS;
2040 cifs_reclassify_socket4(socket);
2041 }
2042
2043 /* user overrode default port */
2044 if (server->addr.sockAddr.sin_port) {
2045 rc = socket->ops->connect(socket, (struct sockaddr *)
2046 &server->addr.sockAddr,
2047 sizeof(struct sockaddr_in), 0);
2048 if (rc >= 0)
2049 connected = true;
2050 }
2051
2052 if (!connected) {
2053 /* save original port so we can retry user specified port
2054 later if fall back ports fail this time */
2055 orig_port = server->addr.sockAddr.sin_port;
2056
2057 /* do not retry on the same port we just failed on */
2058 if (server->addr.sockAddr.sin_port != htons(CIFS_PORT)) {
2059 server->addr.sockAddr.sin_port = htons(CIFS_PORT);
2060 rc = socket->ops->connect(socket,
2061 (struct sockaddr *)
2062 &server->addr.sockAddr,
2063 sizeof(struct sockaddr_in), 0);
2064 if (rc >= 0)
2065 connected = true;
2066 }
2067 }
2068 if (!connected) {
2069 server->addr.sockAddr.sin_port = htons(RFC1001_PORT);
2070 rc = socket->ops->connect(socket, (struct sockaddr *)
2071 &server->addr.sockAddr,
2072 sizeof(struct sockaddr_in), 0);
2073 if (rc >= 0)
2074 connected = true;
2075 }
2076
2077 /* give up here - unless we want to retry on different
2078 protocol families some day */
2079 if (!connected) {
2080 if (orig_port)
2081 server->addr.sockAddr.sin_port = orig_port;
2082 cFYI(1, "Error %d connecting to server via ipv4", rc);
2083 sock_release(socket);
2084 server->ssocket = NULL;
2085 return rc;
2086 }
2087
2088
2089 /*
2090 * Eventually check for other socket options to change from
2091 * the default. sock_setsockopt not used because it expects
2092 * user space buffer
2093 */
2094 socket->sk->sk_rcvtimeo = 7 * HZ;
2095 socket->sk->sk_sndtimeo = 5 * HZ;
2096
2097 /* make the bufsizes depend on wsize/rsize and max requests */
2098 if (server->noautotune) {
2099 if (socket->sk->sk_sndbuf < (200 * 1024))
2100 socket->sk->sk_sndbuf = 200 * 1024;
2101 if (socket->sk->sk_rcvbuf < (140 * 1024))
2102 socket->sk->sk_rcvbuf = 140 * 1024;
2103 }
2104
2105 if (server->tcp_nodelay) {
2106 val = 1;
2107 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
2108 (char *)&val, sizeof(val));
2109 if (rc)
2110 cFYI(1, "set TCP_NODELAY socket option error %d", rc);
2111 }
2112
2113 cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
2114 socket->sk->sk_sndbuf,
2115 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
2116
2117 /* send RFC1001 sessinit */
2118 if (server->addr.sockAddr.sin_port == htons(RFC1001_PORT)) {
2119 /* some servers require RFC1001 sessinit before sending
2120 negprot - BB check reconnection in case where second
2121 sessinit is sent but no second negprot */
2122 struct rfc1002_session_packet *ses_init_buf;
2123 struct smb_hdr *smb_buf;
2124 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
2125 GFP_KERNEL);
2126 if (ses_init_buf) {
2127 ses_init_buf->trailer.session_req.called_len = 32;
2128 if (server->server_RFC1001_name &&
2129 server->server_RFC1001_name[0] != 0)
2130 rfc1002mangle(ses_init_buf->trailer.
2131 session_req.called_name,
2132 server->server_RFC1001_name,
2133 RFC1001_NAME_LEN_WITH_NULL);
2134 else
2135 rfc1002mangle(ses_init_buf->trailer.
2136 session_req.called_name,
2137 DEFAULT_CIFS_CALLED_NAME,
2138 RFC1001_NAME_LEN_WITH_NULL);
2139
2140 ses_init_buf->trailer.session_req.calling_len = 32;
2141
2142 /* calling name ends in null (byte 16) from old smb
2143 convention. */
2144 if (server->workstation_RFC1001_name &&
2145 server->workstation_RFC1001_name[0] != 0)
2146 rfc1002mangle(ses_init_buf->trailer.
2147 session_req.calling_name,
2148 server->workstation_RFC1001_name,
2149 RFC1001_NAME_LEN_WITH_NULL);
2150 else
2151 rfc1002mangle(ses_init_buf->trailer.
2152 session_req.calling_name,
2153 "LINUX_CIFS_CLNT",
2154 RFC1001_NAME_LEN_WITH_NULL);
2155
2156 ses_init_buf->trailer.session_req.scope1 = 0;
2157 ses_init_buf->trailer.session_req.scope2 = 0;
2158 smb_buf = (struct smb_hdr *)ses_init_buf;
2159 /* sizeof RFC1002_SESSION_REQUEST with no scope */
2160 smb_buf->smb_buf_length = 0x81000044;
2161 rc = smb_send(server, smb_buf, 0x44);
2162 kfree(ses_init_buf);
2163 msleep(1); /* RFC1001 layer in at least one server
2164 requires very short break before negprot
2165 presumably because not expecting negprot
2166 to follow so fast. This is a simple
2167 solution that works without
2168 complicating the code and causes no
2169 significant slowing down on mount
2170 for everyone else */
2171 }
2172 /* else the negprot may still work without this
2173 even though malloc failed */
2174
2175 }
2176
2177 return rc;
2178 }
2179
2180 static int
2181 ipv6_connect(struct TCP_Server_Info *server)
2182 {
2183 int rc = 0;
2184 int val;
2185 bool connected = false;
2186 __be16 orig_port = 0;
2187 struct socket *socket = server->ssocket;
2188
2189 if (socket == NULL) {
2190 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
2191 IPPROTO_TCP, &socket);
2192 if (rc < 0) {
2193 cERROR(1, "Error %d creating ipv6 socket", rc);
2194 socket = NULL;
2195 return rc;
2196 }
2197
2198 /* BB other socket options to set KEEPALIVE, NODELAY? */
2199 cFYI(1, "ipv6 Socket created");
2200 server->ssocket = socket;
2201 socket->sk->sk_allocation = GFP_NOFS;
2202 cifs_reclassify_socket6(socket);
2203 }
2204
2205 /* user overrode default port */
2206 if (server->addr.sockAddr6.sin6_port) {
2207 rc = socket->ops->connect(socket,
2208 (struct sockaddr *) &server->addr.sockAddr6,
2209 sizeof(struct sockaddr_in6), 0);
2210 if (rc >= 0)
2211 connected = true;
2212 }
2213
2214 if (!connected) {
2215 /* save original port so we can retry user specified port
2216 later if fall back ports fail this time */
2217
2218 orig_port = server->addr.sockAddr6.sin6_port;
2219 /* do not retry on the same port we just failed on */
2220 if (server->addr.sockAddr6.sin6_port != htons(CIFS_PORT)) {
2221 server->addr.sockAddr6.sin6_port = htons(CIFS_PORT);
2222 rc = socket->ops->connect(socket, (struct sockaddr *)
2223 &server->addr.sockAddr6,
2224 sizeof(struct sockaddr_in6), 0);
2225 if (rc >= 0)
2226 connected = true;
2227 }
2228 }
2229 if (!connected) {
2230 server->addr.sockAddr6.sin6_port = htons(RFC1001_PORT);
2231 rc = socket->ops->connect(socket, (struct sockaddr *)
2232 &server->addr.sockAddr6,
2233 sizeof(struct sockaddr_in6), 0);
2234 if (rc >= 0)
2235 connected = true;
2236 }
2237
2238 /* give up here - unless we want to retry on different
2239 protocol families some day */
2240 if (!connected) {
2241 if (orig_port)
2242 server->addr.sockAddr6.sin6_port = orig_port;
2243 cFYI(1, "Error %d connecting to server via ipv6", rc);
2244 sock_release(socket);
2245 server->ssocket = NULL;
2246 return rc;
2247 }
2248
2249 /*
2250 * Eventually check for other socket options to change from
2251 * the default. sock_setsockopt not used because it expects
2252 * user space buffer
2253 */
2254 socket->sk->sk_rcvtimeo = 7 * HZ;
2255 socket->sk->sk_sndtimeo = 5 * HZ;
2256
2257 if (server->tcp_nodelay) {
2258 val = 1;
2259 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
2260 (char *)&val, sizeof(val));
2261 if (rc)
2262 cFYI(1, "set TCP_NODELAY socket option error %d", rc);
2263 }
2264
2265 server->ssocket = socket;
2266
2267 return rc;
2268 }
2269
2270 void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
2271 struct super_block *sb, struct smb_vol *vol_info)
2272 {
2273 /* if we are reconnecting then should we check to see if
2274 * any requested capabilities changed locally e.g. via
2275 * remount but we can not do much about it here
2276 * if they have (even if we could detect it by the following)
2277 * Perhaps we could add a backpointer to array of sb from tcon
2278 * or if we change to make all sb to same share the same
2279 * sb as NFS - then we only have one backpointer to sb.
2280 * What if we wanted to mount the server share twice once with
2281 * and once without posixacls or posix paths? */
2282 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
2283
2284 if (vol_info && vol_info->no_linux_ext) {
2285 tcon->fsUnixInfo.Capability = 0;
2286 tcon->unix_ext = 0; /* Unix Extensions disabled */
2287 cFYI(1, "Linux protocol extensions disabled");
2288 return;
2289 } else if (vol_info)
2290 tcon->unix_ext = 1; /* Unix Extensions supported */
2291
2292 if (tcon->unix_ext == 0) {
2293 cFYI(1, "Unix extensions disabled so not set on reconnect");
2294 return;
2295 }
2296
2297 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
2298 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
2299
2300 /* check for reconnect case in which we do not
2301 want to change the mount behavior if we can avoid it */
2302 if (vol_info == NULL) {
2303 /* turn off POSIX ACL and PATHNAMES if not set
2304 originally at mount time */
2305 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
2306 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
2307 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2308 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2309 cERROR(1, "POSIXPATH support change");
2310 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2311 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2312 cERROR(1, "possible reconnect error");
2313 cERROR(1, "server disabled POSIX path support");
2314 }
2315 }
2316
2317 cap &= CIFS_UNIX_CAP_MASK;
2318 if (vol_info && vol_info->no_psx_acl)
2319 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
2320 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
2321 cFYI(1, "negotiated posix acl support");
2322 if (sb)
2323 sb->s_flags |= MS_POSIXACL;
2324 }
2325
2326 if (vol_info && vol_info->posix_paths == 0)
2327 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2328 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
2329 cFYI(1, "negotiate posix pathnames");
2330 if (sb)
2331 CIFS_SB(sb)->mnt_cifs_flags |=
2332 CIFS_MOUNT_POSIX_PATHS;
2333 }
2334
2335 /* We might be setting the path sep back to a different
2336 form if we are reconnecting and the server switched its
2337 posix path capability for this share */
2338 if (sb && (CIFS_SB(sb)->prepathlen > 0))
2339 CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
2340
2341 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
2342 if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
2343 CIFS_SB(sb)->rsize = 127 * 1024;
2344 cFYI(DBG2, "larger reads not supported by srv");
2345 }
2346 }
2347
2348
2349 cFYI(1, "Negotiate caps 0x%x", (int)cap);
2350 #ifdef CONFIG_CIFS_DEBUG2
2351 if (cap & CIFS_UNIX_FCNTL_CAP)
2352 cFYI(1, "FCNTL cap");
2353 if (cap & CIFS_UNIX_EXTATTR_CAP)
2354 cFYI(1, "EXTATTR cap");
2355 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2356 cFYI(1, "POSIX path cap");
2357 if (cap & CIFS_UNIX_XATTR_CAP)
2358 cFYI(1, "XATTR cap");
2359 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
2360 cFYI(1, "POSIX ACL cap");
2361 if (cap & CIFS_UNIX_LARGE_READ_CAP)
2362 cFYI(1, "very large read cap");
2363 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
2364 cFYI(1, "very large write cap");
2365 #endif /* CIFS_DEBUG2 */
2366 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
2367 if (vol_info == NULL) {
2368 cFYI(1, "resetting capabilities failed");
2369 } else
2370 cERROR(1, "Negotiating Unix capabilities "
2371 "with the server failed. Consider "
2372 "mounting with the Unix Extensions\n"
2373 "disabled, if problems are found, "
2374 "by specifying the nounix mount "
2375 "option.");
2376
2377 }
2378 }
2379 }
2380
2381 static void
2382 convert_delimiter(char *path, char delim)
2383 {
2384 int i;
2385 char old_delim;
2386
2387 if (path == NULL)
2388 return;
2389
2390 if (delim == '/')
2391 old_delim = '\\';
2392 else
2393 old_delim = '/';
2394
2395 for (i = 0; path[i] != '\0'; i++) {
2396 if (path[i] == old_delim)
2397 path[i] = delim;
2398 }
2399 }
2400
2401 static void setup_cifs_sb(struct smb_vol *pvolume_info,
2402 struct cifs_sb_info *cifs_sb)
2403 {
2404 if (pvolume_info->rsize > CIFSMaxBufSize) {
2405 cERROR(1, "rsize %d too large, using MaxBufSize",
2406 pvolume_info->rsize);
2407 cifs_sb->rsize = CIFSMaxBufSize;
2408 } else if ((pvolume_info->rsize) &&
2409 (pvolume_info->rsize <= CIFSMaxBufSize))
2410 cifs_sb->rsize = pvolume_info->rsize;
2411 else /* default */
2412 cifs_sb->rsize = CIFSMaxBufSize;
2413
2414 if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
2415 cERROR(1, "wsize %d too large, using 4096 instead",
2416 pvolume_info->wsize);
2417 cifs_sb->wsize = 4096;
2418 } else if (pvolume_info->wsize)
2419 cifs_sb->wsize = pvolume_info->wsize;
2420 else
2421 cifs_sb->wsize = min_t(const int,
2422 PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2423 127*1024);
2424 /* old default of CIFSMaxBufSize was too small now
2425 that SMB Write2 can send multiple pages in kvec.
2426 RFC1001 does not describe what happens when frame
2427 bigger than 128K is sent so use that as max in
2428 conjunction with 52K kvec constraint on arch with 4K
2429 page size */
2430
2431 if (cifs_sb->rsize < 2048) {
2432 cifs_sb->rsize = 2048;
2433 /* Windows ME may prefer this */
2434 cFYI(1, "readsize set to minimum: 2048");
2435 }
2436 /* calculate prepath */
2437 cifs_sb->prepath = pvolume_info->prepath;
2438 if (cifs_sb->prepath) {
2439 cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2440 /* we can not convert the / to \ in the path
2441 separators in the prefixpath yet because we do not
2442 know (until reset_cifs_unix_caps is called later)
2443 whether POSIX PATH CAP is available. We normalize
2444 the / to \ after reset_cifs_unix_caps is called */
2445 pvolume_info->prepath = NULL;
2446 } else
2447 cifs_sb->prepathlen = 0;
2448 cifs_sb->mnt_uid = pvolume_info->linux_uid;
2449 cifs_sb->mnt_gid = pvolume_info->linux_gid;
2450 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
2451 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
2452 cFYI(1, "file mode: 0x%x dir mode: 0x%x",
2453 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
2454
2455 if (pvolume_info->noperm)
2456 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2457 if (pvolume_info->setuids)
2458 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2459 if (pvolume_info->server_ino)
2460 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2461 if (pvolume_info->remap)
2462 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2463 if (pvolume_info->no_xattr)
2464 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2465 if (pvolume_info->sfu_emul)
2466 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2467 if (pvolume_info->nobrl)
2468 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2469 if (pvolume_info->nostrictsync)
2470 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
2471 if (pvolume_info->mand_lock)
2472 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
2473 if (pvolume_info->cifs_acl)
2474 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2475 if (pvolume_info->override_uid)
2476 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2477 if (pvolume_info->override_gid)
2478 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2479 if (pvolume_info->dynperm)
2480 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
2481 if (pvolume_info->fsc)
2482 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
2483 if (pvolume_info->direct_io) {
2484 cFYI(1, "mounting share using direct i/o");
2485 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2486 }
2487
2488 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
2489 cERROR(1, "mount option dynperm ignored if cifsacl "
2490 "mount option supported");
2491 }
2492
2493 static int
2494 is_path_accessible(int xid, struct cifsTconInfo *tcon,
2495 struct cifs_sb_info *cifs_sb, const char *full_path)
2496 {
2497 int rc;
2498 FILE_ALL_INFO *pfile_info;
2499
2500 pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
2501 if (pfile_info == NULL)
2502 return -ENOMEM;
2503
2504 rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info,
2505 0 /* not legacy */, cifs_sb->local_nls,
2506 cifs_sb->mnt_cifs_flags &
2507 CIFS_MOUNT_MAP_SPECIAL_CHR);
2508 kfree(pfile_info);
2509 return rc;
2510 }
2511
2512 static void
2513 cleanup_volume_info(struct smb_vol **pvolume_info)
2514 {
2515 struct smb_vol *volume_info;
2516
2517 if (!pvolume_info || !*pvolume_info)
2518 return;
2519
2520 volume_info = *pvolume_info;
2521 kzfree(volume_info->password);
2522 kfree(volume_info->UNC);
2523 kfree(volume_info->prepath);
2524 kfree(volume_info);
2525 *pvolume_info = NULL;
2526 return;
2527 }
2528
2529 #ifdef CONFIG_CIFS_DFS_UPCALL
2530 /* build_path_to_root returns full path to root when
2531 * we do not have an exiting connection (tcon) */
2532 static char *
2533 build_unc_path_to_root(const struct smb_vol *volume_info,
2534 const struct cifs_sb_info *cifs_sb)
2535 {
2536 char *full_path;
2537
2538 int unc_len = strnlen(volume_info->UNC, MAX_TREE_SIZE + 1);
2539 full_path = kmalloc(unc_len + cifs_sb->prepathlen + 1, GFP_KERNEL);
2540 if (full_path == NULL)
2541 return ERR_PTR(-ENOMEM);
2542
2543 strncpy(full_path, volume_info->UNC, unc_len);
2544 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) {
2545 int i;
2546 for (i = 0; i < unc_len; i++) {
2547 if (full_path[i] == '\\')
2548 full_path[i] = '/';
2549 }
2550 }
2551
2552 if (cifs_sb->prepathlen)
2553 strncpy(full_path + unc_len, cifs_sb->prepath,
2554 cifs_sb->prepathlen);
2555
2556 full_path[unc_len + cifs_sb->prepathlen] = 0; /* add trailing null */
2557 return full_path;
2558 }
2559 #endif
2560
2561 int
2562 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
2563 char *mount_data_global, const char *devname)
2564 {
2565 int rc;
2566 int xid;
2567 struct smb_vol *volume_info;
2568 struct cifsSesInfo *pSesInfo;
2569 struct cifsTconInfo *tcon;
2570 struct TCP_Server_Info *srvTcp;
2571 char *full_path;
2572 char *mount_data = mount_data_global;
2573 #ifdef CONFIG_CIFS_DFS_UPCALL
2574 struct dfs_info3_param *referrals = NULL;
2575 unsigned int num_referrals = 0;
2576 int referral_walks_count = 0;
2577 try_mount_again:
2578 #endif
2579 rc = 0;
2580 tcon = NULL;
2581 pSesInfo = NULL;
2582 srvTcp = NULL;
2583 full_path = NULL;
2584
2585 xid = GetXid();
2586
2587 volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
2588 if (!volume_info) {
2589 rc = -ENOMEM;
2590 goto out;
2591 }
2592
2593 if (cifs_parse_mount_options(mount_data, devname, volume_info)) {
2594 rc = -EINVAL;
2595 goto out;
2596 }
2597
2598 if (volume_info->nullauth) {
2599 cFYI(1, "null user");
2600 volume_info->username = "";
2601 } else if (volume_info->username) {
2602 /* BB fixme parse for domain name here */
2603 cFYI(1, "Username: %s", volume_info->username);
2604 } else {
2605 cifserror("No username specified");
2606 /* In userspace mount helper we can get user name from alternate
2607 locations such as env variables and files on disk */
2608 rc = -EINVAL;
2609 goto out;
2610 }
2611
2612 /* this is needed for ASCII cp to Unicode converts */
2613 if (volume_info->iocharset == NULL) {
2614 /* load_nls_default cannot return null */
2615 volume_info->local_nls = load_nls_default();
2616 } else {
2617 volume_info->local_nls = load_nls(volume_info->iocharset);
2618 if (volume_info->local_nls == NULL) {
2619 cERROR(1, "CIFS mount error: iocharset %s not found",
2620 volume_info->iocharset);
2621 rc = -ELIBACC;
2622 goto out;
2623 }
2624 }
2625 cifs_sb->local_nls = volume_info->local_nls;
2626
2627 /* get a reference to a tcp session */
2628 srvTcp = cifs_get_tcp_session(volume_info);
2629 if (IS_ERR(srvTcp)) {
2630 rc = PTR_ERR(srvTcp);
2631 goto out;
2632 }
2633
2634 /* get a reference to a SMB session */
2635 pSesInfo = cifs_get_smb_ses(srvTcp, volume_info);
2636 if (IS_ERR(pSesInfo)) {
2637 rc = PTR_ERR(pSesInfo);
2638 pSesInfo = NULL;
2639 goto mount_fail_check;
2640 }
2641
2642 setup_cifs_sb(volume_info, cifs_sb);
2643 if (pSesInfo->capabilities & CAP_LARGE_FILES)
2644 sb->s_maxbytes = MAX_LFS_FILESIZE;
2645 else
2646 sb->s_maxbytes = MAX_NON_LFS;
2647
2648 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
2649 sb->s_time_gran = 100;
2650
2651 /* search for existing tcon to this server share */
2652 tcon = cifs_get_tcon(pSesInfo, volume_info);
2653 if (IS_ERR(tcon)) {
2654 rc = PTR_ERR(tcon);
2655 tcon = NULL;
2656 goto remote_path_check;
2657 }
2658
2659 cifs_sb->tcon = tcon;
2660
2661 /* do not care if following two calls succeed - informational */
2662 if (!tcon->ipc) {
2663 CIFSSMBQFSDeviceInfo(xid, tcon);
2664 CIFSSMBQFSAttributeInfo(xid, tcon);
2665 }
2666
2667 /* tell server which Unix caps we support */
2668 if (tcon->ses->capabilities & CAP_UNIX)
2669 /* reset of caps checks mount to see if unix extensions
2670 disabled for just this mount */
2671 reset_cifs_unix_caps(xid, tcon, sb, volume_info);
2672 else
2673 tcon->unix_ext = 0; /* server does not support them */
2674
2675 /* convert forward to back slashes in prepath here if needed */
2676 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2677 convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb));
2678
2679 if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2680 cifs_sb->rsize = 1024 * 127;
2681 cFYI(DBG2, "no very large read support, rsize now 127K");
2682 }
2683 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2684 cifs_sb->wsize = min(cifs_sb->wsize,
2685 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2686 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2687 cifs_sb->rsize = min(cifs_sb->rsize,
2688 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2689
2690 remote_path_check:
2691 /* check if a whole path (including prepath) is not remote */
2692 if (!rc && cifs_sb->prepathlen && tcon) {
2693 /* build_path_to_root works only when we have a valid tcon */
2694 full_path = cifs_build_path_to_root(cifs_sb);
2695 if (full_path == NULL) {
2696 rc = -ENOMEM;
2697 goto mount_fail_check;
2698 }
2699 rc = is_path_accessible(xid, tcon, cifs_sb, full_path);
2700 if (rc != -EREMOTE) {
2701 kfree(full_path);
2702 goto mount_fail_check;
2703 }
2704 kfree(full_path);
2705 }
2706
2707 /* get referral if needed */
2708 if (rc == -EREMOTE) {
2709 #ifdef CONFIG_CIFS_DFS_UPCALL
2710 if (referral_walks_count > MAX_NESTED_LINKS) {
2711 /*
2712 * BB: when we implement proper loop detection,
2713 * we will remove this check. But now we need it
2714 * to prevent an indefinite loop if 'DFS tree' is
2715 * misconfigured (i.e. has loops).
2716 */
2717 rc = -ELOOP;
2718 goto mount_fail_check;
2719 }
2720 /* convert forward to back slashes in prepath here if needed */
2721 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2722 convert_delimiter(cifs_sb->prepath,
2723 CIFS_DIR_SEP(cifs_sb));
2724 full_path = build_unc_path_to_root(volume_info, cifs_sb);
2725 if (IS_ERR(full_path)) {
2726 rc = PTR_ERR(full_path);
2727 goto mount_fail_check;
2728 }
2729
2730 cFYI(1, "Getting referral for: %s", full_path);
2731 rc = get_dfs_path(xid, pSesInfo , full_path + 1,
2732 cifs_sb->local_nls, &num_referrals, &referrals,
2733 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
2734 if (!rc && num_referrals > 0) {
2735 char *fake_devname = NULL;
2736
2737 if (mount_data != mount_data_global)
2738 kfree(mount_data);
2739
2740 mount_data = cifs_compose_mount_options(
2741 cifs_sb->mountdata, full_path + 1,
2742 referrals, &fake_devname);
2743
2744 free_dfs_info_array(referrals, num_referrals);
2745 kfree(fake_devname);
2746 kfree(full_path);
2747
2748 if (IS_ERR(mount_data)) {
2749 rc = PTR_ERR(mount_data);
2750 mount_data = NULL;
2751 goto mount_fail_check;
2752 }
2753
2754 if (tcon)
2755 cifs_put_tcon(tcon);
2756 else if (pSesInfo)
2757 cifs_put_smb_ses(pSesInfo);
2758
2759 cleanup_volume_info(&volume_info);
2760 referral_walks_count++;
2761 FreeXid(xid);
2762 goto try_mount_again;
2763 }
2764 #else /* No DFS support, return error on mount */
2765 rc = -EOPNOTSUPP;
2766 #endif
2767 }
2768
2769 mount_fail_check:
2770 /* on error free sesinfo and tcon struct if needed */
2771 if (rc) {
2772 if (mount_data != mount_data_global)
2773 kfree(mount_data);
2774 /* If find_unc succeeded then rc == 0 so we can not end */
2775 /* up accidently freeing someone elses tcon struct */
2776 if (tcon)
2777 cifs_put_tcon(tcon);
2778 else if (pSesInfo)
2779 cifs_put_smb_ses(pSesInfo);
2780 else
2781 cifs_put_tcp_session(srvTcp);
2782 goto out;
2783 }
2784
2785 /* volume_info->password is freed above when existing session found
2786 (in which case it is not needed anymore) but when new sesion is created
2787 the password ptr is put in the new session structure (in which case the
2788 password will be freed at unmount time) */
2789 out:
2790 /* zero out password before freeing */
2791 cleanup_volume_info(&volume_info);
2792 FreeXid(xid);
2793 return rc;
2794 }
2795
2796 int
2797 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
2798 const char *tree, struct cifsTconInfo *tcon,
2799 const struct nls_table *nls_codepage)
2800 {
2801 struct smb_hdr *smb_buffer;
2802 struct smb_hdr *smb_buffer_response;
2803 TCONX_REQ *pSMB;
2804 TCONX_RSP *pSMBr;
2805 unsigned char *bcc_ptr;
2806 int rc = 0;
2807 int length, bytes_left;
2808 __u16 count;
2809
2810 if (ses == NULL)
2811 return -EIO;
2812
2813 smb_buffer = cifs_buf_get();
2814 if (smb_buffer == NULL)
2815 return -ENOMEM;
2816
2817 smb_buffer_response = smb_buffer;
2818
2819 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
2820 NULL /*no tid */ , 4 /*wct */ );
2821
2822 smb_buffer->Mid = GetNextMid(ses->server);
2823 smb_buffer->Uid = ses->Suid;
2824 pSMB = (TCONX_REQ *) smb_buffer;
2825 pSMBr = (TCONX_RSP *) smb_buffer_response;
2826
2827 pSMB->AndXCommand = 0xFF;
2828 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
2829 bcc_ptr = &pSMB->Password[0];
2830 if ((ses->server->secMode) & SECMODE_USER) {
2831 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
2832 *bcc_ptr = 0; /* password is null byte */
2833 bcc_ptr++; /* skip password */
2834 /* already aligned so no need to do it below */
2835 } else {
2836 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
2837 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
2838 specified as required (when that support is added to
2839 the vfs in the future) as only NTLM or the much
2840 weaker LANMAN (which we do not send by default) is accepted
2841 by Samba (not sure whether other servers allow
2842 NTLMv2 password here) */
2843 #ifdef CONFIG_CIFS_WEAK_PW_HASH
2844 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
2845 (ses->server->secType == LANMAN))
2846 calc_lanman_hash(tcon->password, ses->server->cryptKey,
2847 ses->server->secMode &
2848 SECMODE_PW_ENCRYPT ? true : false,
2849 bcc_ptr);
2850 else
2851 #endif /* CIFS_WEAK_PW_HASH */
2852 SMBNTencrypt(tcon->password, ses->server->cryptKey,
2853 bcc_ptr);
2854
2855 bcc_ptr += CIFS_SESS_KEY_SIZE;
2856 if (ses->capabilities & CAP_UNICODE) {
2857 /* must align unicode strings */
2858 *bcc_ptr = 0; /* null byte password */
2859 bcc_ptr++;
2860 }
2861 }
2862
2863 if (ses->server->secMode &
2864 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2865 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2866
2867 if (ses->capabilities & CAP_STATUS32) {
2868 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2869 }
2870 if (ses->capabilities & CAP_DFS) {
2871 smb_buffer->Flags2 |= SMBFLG2_DFS;
2872 }
2873 if (ses->capabilities & CAP_UNICODE) {
2874 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2875 length =
2876 cifs_strtoUCS((__le16 *) bcc_ptr, tree,
2877 6 /* max utf8 char length in bytes */ *
2878 (/* server len*/ + 256 /* share len */), nls_codepage);
2879 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
2880 bcc_ptr += 2; /* skip trailing null */
2881 } else { /* ASCII */
2882 strcpy(bcc_ptr, tree);
2883 bcc_ptr += strlen(tree) + 1;
2884 }
2885 strcpy(bcc_ptr, "?????");
2886 bcc_ptr += strlen("?????");
2887 bcc_ptr += 1;
2888 count = bcc_ptr - &pSMB->Password[0];
2889 pSMB->hdr.smb_buf_length += count;
2890 pSMB->ByteCount = cpu_to_le16(count);
2891
2892 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
2893 CIFS_STD_OP);
2894
2895 /* above now done in SendReceive */
2896 if ((rc == 0) && (tcon != NULL)) {
2897 bool is_unicode;
2898
2899 tcon->tidStatus = CifsGood;
2900 tcon->need_reconnect = false;
2901 tcon->tid = smb_buffer_response->Tid;
2902 bcc_ptr = pByteArea(smb_buffer_response);
2903 bytes_left = BCC(smb_buffer_response);
2904 length = strnlen(bcc_ptr, bytes_left - 2);
2905 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
2906 is_unicode = true;
2907 else
2908 is_unicode = false;
2909
2910
2911 /* skip service field (NB: this field is always ASCII) */
2912 if (length == 3) {
2913 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
2914 (bcc_ptr[2] == 'C')) {
2915 cFYI(1, "IPC connection");
2916 tcon->ipc = 1;
2917 }
2918 } else if (length == 2) {
2919 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
2920 /* the most common case */
2921 cFYI(1, "disk share connection");
2922 }
2923 }
2924 bcc_ptr += length + 1;
2925 bytes_left -= (length + 1);
2926 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
2927
2928 /* mostly informational -- no need to fail on error here */
2929 kfree(tcon->nativeFileSystem);
2930 tcon->nativeFileSystem = cifs_strndup_from_ucs(bcc_ptr,
2931 bytes_left, is_unicode,
2932 nls_codepage);
2933
2934 cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem);
2935
2936 if ((smb_buffer_response->WordCount == 3) ||
2937 (smb_buffer_response->WordCount == 7))
2938 /* field is in same location */
2939 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
2940 else
2941 tcon->Flags = 0;
2942 cFYI(1, "Tcon flags: 0x%x ", tcon->Flags);
2943 } else if ((rc == 0) && tcon == NULL) {
2944 /* all we need to save for IPC$ connection */
2945 ses->ipc_tid = smb_buffer_response->Tid;
2946 }
2947
2948 cifs_buf_release(smb_buffer);
2949 return rc;
2950 }
2951
2952 int
2953 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
2954 {
2955 int rc = 0;
2956 char *tmp;
2957
2958 if (cifs_sb->tcon)
2959 cifs_put_tcon(cifs_sb->tcon);
2960
2961 cifs_sb->tcon = NULL;
2962 tmp = cifs_sb->prepath;
2963 cifs_sb->prepathlen = 0;
2964 cifs_sb->prepath = NULL;
2965 kfree(tmp);
2966
2967 return rc;
2968 }
2969
2970 int cifs_negotiate_protocol(unsigned int xid, struct cifsSesInfo *ses)
2971 {
2972 int rc = 0;
2973 struct TCP_Server_Info *server = ses->server;
2974
2975 /* only send once per connect */
2976 if (server->maxBuf != 0)
2977 return 0;
2978
2979 rc = CIFSSMBNegotiate(xid, ses);
2980 if (rc == -EAGAIN) {
2981 /* retry only once on 1st time connection */
2982 rc = CIFSSMBNegotiate(xid, ses);
2983 if (rc == -EAGAIN)
2984 rc = -EHOSTDOWN;
2985 }
2986 if (rc == 0) {
2987 spin_lock(&GlobalMid_Lock);
2988 if (server->tcpStatus != CifsExiting)
2989 server->tcpStatus = CifsGood;
2990 else
2991 rc = -EHOSTDOWN;
2992 spin_unlock(&GlobalMid_Lock);
2993
2994 }
2995
2996 return rc;
2997 }
2998
2999
3000 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *ses,
3001 struct nls_table *nls_info)
3002 {
3003 int rc = 0;
3004 struct TCP_Server_Info *server = ses->server;
3005
3006 ses->flags = 0;
3007 ses->capabilities = server->capabilities;
3008 if (linuxExtEnabled == 0)
3009 ses->capabilities &= (~CAP_UNIX);
3010
3011 cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3012 server->secMode, server->capabilities, server->timeAdj);
3013
3014 rc = CIFS_SessSetup(xid, ses, nls_info);
3015 if (rc) {
3016 cERROR(1, "Send error in SessSetup = %d", rc);
3017 } else {
3018 cFYI(1, "CIFS Session Established successfully");
3019 spin_lock(&GlobalMid_Lock);
3020 ses->status = CifsGood;
3021 ses->need_reconnect = false;
3022 spin_unlock(&GlobalMid_Lock);
3023 }
3024
3025 return rc;
3026 }
3027
CJK support for tty framebuffer vt