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GUI: Fix Tomato RAF theme for all builds. Compilation typo.
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / fs / cifs / connect.c
bloba9b9ca3a184aa41a9e8ddfc73b1fc5dbf9b944c5
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 ||
404 length == -EAGAIN ||
405 length == -EINTR) {
406 msleep(1); /* minimum sleep to prevent looping
407 allowing socket to clear and app threads to set
408 tcpStatus CifsNeedReconnect if server hung */
409 if (pdu_length < 4) {
410 iov.iov_base = (4 - pdu_length) +
411 (char *)smb_buffer;
412 iov.iov_len = pdu_length;
413 smb_msg.msg_control = NULL;
414 smb_msg.msg_controllen = 0;
415 goto incomplete_rcv;
416 } else
417 continue;
418 } else if (length <= 0) {
419 cFYI(1, "Reconnect after unexpected peek error %d",
420 length);
421 cifs_reconnect(server);
422 csocket = server->ssocket;
423 wake_up(&server->response_q);
424 continue;
425 } else if (length < pdu_length) {
426 cFYI(1, "requested %d bytes but only got %d bytes",
427 pdu_length, length);
428 pdu_length -= length;
429 msleep(1);
430 goto incomplete_rcv;
431 }
432
433 /* The right amount was read from socket - 4 bytes */
434 /* so we can now interpret the length field */
435
436 /* the first byte big endian of the length field,
437 is actually not part of the length but the type
438 with the most common, zero, as regular data */
439 temp = *((char *) smb_buffer);
440
441 /* Note that FC 1001 length is big endian on the wire,
442 but we convert it here so it is always manipulated
443 as host byte order */
444 pdu_length = be32_to_cpu((__force __be32)smb_buffer->smb_buf_length);
445 smb_buffer->smb_buf_length = pdu_length;
446
447 cFYI(1, "rfc1002 length 0x%x", pdu_length+4);
448
449 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
450 continue;
451 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
452 cFYI(1, "Good RFC 1002 session rsp");
453 continue;
454 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
455 /* we get this from Windows 98 instead of
456 an error on SMB negprot response */
457 cFYI(1, "Negative RFC1002 Session Response Error 0x%x)",
458 pdu_length);
459 /* give server a second to clean up */
460 msleep(1000);
461 /* always try 445 first on reconnect since we get NACK
462 * on some if we ever connected to port 139 (the NACK
463 * is since we do not begin with RFC1001 session
464 * initialize frame)
465 */
466 cifs_set_port((struct sockaddr *)
467 &server->addr.sockAddr, CIFS_PORT);
468 cifs_reconnect(server);
469 csocket = server->ssocket;
470 wake_up(&server->response_q);
471 continue;
472 } else if (temp != (char) 0) {
473 cERROR(1, "Unknown RFC 1002 frame");
474 cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
475 length);
476 cifs_reconnect(server);
477 csocket = server->ssocket;
478 continue;
479 }
480
481 /* else we have an SMB response */
482 if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
483 (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) {
484 cERROR(1, "Invalid size SMB length %d pdu_length %d",
485 length, pdu_length+4);
486 cifs_reconnect(server);
487 csocket = server->ssocket;
488 wake_up(&server->response_q);
489 continue;
490 }
491
492 /* else length ok */
493 reconnect = 0;
494
495 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
496 isLargeBuf = true;
497 memcpy(bigbuf, smallbuf, 4);
498 smb_buffer = bigbuf;
499 }
500 length = 0;
501 iov.iov_base = 4 + (char *)smb_buffer;
502 iov.iov_len = pdu_length;
503 for (total_read = 0; total_read < pdu_length;
504 total_read += length) {
505 length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
506 pdu_length - total_read, 0);
507 if (server->tcpStatus == CifsExiting) {
508 /* then will exit */
509 reconnect = 2;
510 break;
511 } else if (server->tcpStatus == CifsNeedReconnect) {
512 cifs_reconnect(server);
513 csocket = server->ssocket;
514 /* Reconnect wakes up rspns q */
515 /* Now we will reread sock */
516 reconnect = 1;
517 break;
518 } else if (length == -ERESTARTSYS ||
519 length == -EAGAIN ||
520 length == -EINTR) {
521 msleep(1); /* minimum sleep to prevent looping,
522 allowing socket to clear and app
523 threads to set tcpStatus
524 CifsNeedReconnect if server hung*/
525 length = 0;
526 continue;
527 } else if (length <= 0) {
528 cERROR(1, "Received no data, expecting %d",
529 pdu_length - total_read);
530 cifs_reconnect(server);
531 csocket = server->ssocket;
532 reconnect = 1;
533 break;
534 }
535 }
536 if (reconnect == 2)
537 break;
538 else if (reconnect == 1)
539 continue;
540
541 length += 4; /* account for rfc1002 hdr */
542
543
544 dump_smb(smb_buffer, length);
545 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
546 cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
547 continue;
548 }
549
550
551 task_to_wake = NULL;
552 spin_lock(&GlobalMid_Lock);
553 list_for_each(tmp, &server->pending_mid_q) {
554 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
555
556 if ((mid_entry->mid == smb_buffer->Mid) &&
557 (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
558 (mid_entry->command == smb_buffer->Command)) {
559 if (check2ndT2(smb_buffer,server->maxBuf) > 0) {
560 /* We have a multipart transact2 resp */
561 isMultiRsp = true;
562 if (mid_entry->resp_buf) {
563 /* merge response - fix up 1st*/
564 if (coalesce_t2(smb_buffer,
565 mid_entry->resp_buf)) {
566 mid_entry->multiRsp =
567 true;
568 break;
569 } else {
570 /* all parts received */
571 mid_entry->multiEnd =
572 true;
573 goto multi_t2_fnd;
574 }
575 } else {
576 if (!isLargeBuf) {
577 cERROR(1, "1st trans2 resp needs bigbuf");
578 /* BB maybe we can fix this up, switch
579 to already allocated large buffer? */
580 } else {
581 /* Have first buffer */
582 mid_entry->resp_buf =
583 smb_buffer;
584 mid_entry->largeBuf =
585 true;
586 bigbuf = NULL;
587 }
588 }
589 break;
590 }
591 mid_entry->resp_buf = smb_buffer;
592 mid_entry->largeBuf = isLargeBuf;
593 multi_t2_fnd:
594 task_to_wake = mid_entry->tsk;
595 mid_entry->midState = MID_RESPONSE_RECEIVED;
596 #ifdef CONFIG_CIFS_STATS2
597 mid_entry->when_received = jiffies;
598 #endif
599 /* so we do not time out requests to server
600 which is still responding (since server could
601 be busy but not dead) */
602 server->lstrp = jiffies;
603 break;
604 }
605 }
606 spin_unlock(&GlobalMid_Lock);
607 if (task_to_wake) {
608 /* Was previous buf put in mpx struct for multi-rsp? */
609 if (!isMultiRsp) {
610 /* smb buffer will be freed by user thread */
611 if (isLargeBuf)
612 bigbuf = NULL;
613 else
614 smallbuf = NULL;
615 }
616 wake_up_process(task_to_wake);
617 } else if (!is_valid_oplock_break(smb_buffer, server) &&
618 !isMultiRsp) {
619 cERROR(1, "No task to wake, unknown frame received! "
620 "NumMids %d", midCount.counter);
621 cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
622 sizeof(struct smb_hdr));
623 #ifdef CONFIG_CIFS_DEBUG2
624 cifs_dump_detail(smb_buffer);
625 cifs_dump_mids(server);
626 #endif /* CIFS_DEBUG2 */
627
628 }
629 } /* end while !EXITING */
630
631 /* take it off the list, if it's not already */
632 write_lock(&cifs_tcp_ses_lock);
633 list_del_init(&server->tcp_ses_list);
634 write_unlock(&cifs_tcp_ses_lock);
635
636 spin_lock(&GlobalMid_Lock);
637 server->tcpStatus = CifsExiting;
638 spin_unlock(&GlobalMid_Lock);
639 wake_up_all(&server->response_q);
640
641 /* check if we have blocked requests that need to free */
642 /* Note that cifs_max_pending is normally 50, but
643 can be set at module install time to as little as two */
644 spin_lock(&GlobalMid_Lock);
645 if (atomic_read(&server->inFlight) >= cifs_max_pending)
646 atomic_set(&server->inFlight, cifs_max_pending - 1);
647 /* We do not want to set the max_pending too low or we
648 could end up with the counter going negative */
649 spin_unlock(&GlobalMid_Lock);
650 /* Although there should not be any requests blocked on
651 this queue it can not hurt to be paranoid and try to wake up requests
652 that may haven been blocked when more than 50 at time were on the wire
653 to the same server - they now will see the session is in exit state
654 and get out of SendReceive. */
655 wake_up_all(&server->request_q);
656 /* give those requests time to exit */
657 msleep(125);
658
659 if (server->ssocket) {
660 sock_release(csocket);
661 server->ssocket = NULL;
662 }
663 /* buffer usuallly freed in free_mid - need to free it here on exit */
664 cifs_buf_release(bigbuf);
665 if (smallbuf) /* no sense logging a debug message if NULL */
666 cifs_small_buf_release(smallbuf);
667
668 /*
669 * BB: we shouldn't have to do any of this. It shouldn't be
670 * possible to exit from the thread with active SMB sessions
671 */
672 read_lock(&cifs_tcp_ses_lock);
673 if (list_empty(&server->pending_mid_q)) {
674 /* loop through server session structures attached to this and
675 mark them dead */
676 list_for_each(tmp, &server->smb_ses_list) {
677 ses = list_entry(tmp, struct cifsSesInfo,
678 smb_ses_list);
679 ses->status = CifsExiting;
680 ses->server = NULL;
681 }
682 read_unlock(&cifs_tcp_ses_lock);
683 } else {
684 /* although we can not zero the server struct pointer yet,
685 since there are active requests which may depnd on them,
686 mark the corresponding SMB sessions as exiting too */
687 list_for_each(tmp, &server->smb_ses_list) {
688 ses = list_entry(tmp, struct cifsSesInfo,
689 smb_ses_list);
690 ses->status = CifsExiting;
691 }
692
693 spin_lock(&GlobalMid_Lock);
694 list_for_each(tmp, &server->pending_mid_q) {
695 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
696 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
697 cFYI(1, "Clearing Mid 0x%x - waking up ",
698 mid_entry->mid);
699 task_to_wake = mid_entry->tsk;
700 if (task_to_wake)
701 wake_up_process(task_to_wake);
702 }
703 }
704 spin_unlock(&GlobalMid_Lock);
705 read_unlock(&cifs_tcp_ses_lock);
706 /* 1/8th of sec is more than enough time for them to exit */
707 msleep(125);
708 }
709
710 if (!list_empty(&server->pending_mid_q)) {
711 /* mpx threads have not exited yet give them
712 at least the smb send timeout time for long ops */
713 /* due to delays on oplock break requests, we need
714 to wait at least 45 seconds before giving up
715 on a request getting a response and going ahead
716 and killing cifsd */
717 cFYI(1, "Wait for exit from demultiplex thread");
718 msleep(46000);
719 /* if threads still have not exited they are probably never
720 coming home not much else we can do but free the memory */
721 }
722
723 /* last chance to mark ses pointers invalid
724 if there are any pointing to this (e.g
725 if a crazy root user tried to kill cifsd
726 kernel thread explicitly this might happen) */
727 /* BB: This shouldn't be necessary, see above */
728 read_lock(&cifs_tcp_ses_lock);
729 list_for_each(tmp, &server->smb_ses_list) {
730 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
731 ses->server = NULL;
732 }
733 read_unlock(&cifs_tcp_ses_lock);
734
735 kfree(server->hostname);
736 task_to_wake = xchg(&server->tsk, NULL);
737 kfree(server);
738
739 length = atomic_dec_return(&tcpSesAllocCount);
740 if (length > 0)
741 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
742 GFP_KERNEL);
743
744 /* if server->tsk was NULL then wait for a signal before exiting */
745 if (!task_to_wake) {
746 set_current_state(TASK_INTERRUPTIBLE);
747 while (!signal_pending(current)) {
748 schedule();
749 set_current_state(TASK_INTERRUPTIBLE);
750 }
751 set_current_state(TASK_RUNNING);
752 }
753
754 module_put_and_exit(0);
755 }
756
757 /* extract the host portion of the UNC string */
758 static char *
759 extract_hostname(const char *unc)
760 {
761 const char *src;
762 char *dst, *delim;
763 unsigned int len;
764
765 /* skip double chars at beginning of string */
766 /* BB: check validity of these bytes? */
767 src = unc + 2;
768
769 /* delimiter between hostname and sharename is always '\\' now */
770 delim = strchr(src, '\\');
771 if (!delim)
772 return ERR_PTR(-EINVAL);
773
774 len = delim - src;
775 dst = kmalloc((len + 1), GFP_KERNEL);
776 if (dst == NULL)
777 return ERR_PTR(-ENOMEM);
778
779 memcpy(dst, src, len);
780 dst[len] = '\0';
781
782 return dst;
783 }
784
785 static int
786 cifs_parse_mount_options(char *options, const char *devname,
787 struct smb_vol *vol)
788 {
789 char *value;
790 char *data;
791 unsigned int temp_len, i, j;
792 char separator[2];
793 short int override_uid = -1;
794 short int override_gid = -1;
795 bool uid_specified = false;
796 bool gid_specified = false;
797
798 separator[0] = ',';
799 separator[1] = 0;
800
801 if (Local_System_Name[0] != 0)
802 memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
803 else {
804 char *nodename = utsname()->nodename;
805 int n = strnlen(nodename, 15);
806 memset(vol->source_rfc1001_name, 0x20, 15);
807 for (i = 0; i < n; i++) {
808 /* does not have to be perfect mapping since field is
809 informational, only used for servers that do not support
810 port 445 and it can be overridden at mount time */
811 vol->source_rfc1001_name[i] = toupper(nodename[i]);
812 }
813 }
814 vol->source_rfc1001_name[15] = 0;
815 /* null target name indicates to use *SMBSERVR default called name
816 if we end up sending RFC1001 session initialize */
817 vol->target_rfc1001_name[0] = 0;
818 vol->cred_uid = current_uid();
819 vol->linux_uid = current_uid();
820 vol->linux_gid = current_gid();
821
822 /* default to only allowing write access to owner of the mount */
823 vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
824
825 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
826 /* default is always to request posix paths. */
827 vol->posix_paths = 1;
828 /* default to using server inode numbers where available */
829 vol->server_ino = 1;
830
831 if (!options)
832 return 1;
833
834 if (strncmp(options, "sep=", 4) == 0) {
835 if (options[4] != 0) {
836 separator[0] = options[4];
837 options += 5;
838 } else {
839 cFYI(1, "Null separator not allowed");
840 }
841 }
842
843 while ((data = strsep(&options, separator)) != NULL) {
844 if (!*data)
845 continue;
846 if ((value = strchr(data, '=')) != NULL)
847 *value++ = '\0';
848
849 /* Have to parse this before we parse for "user" */
850 if (strnicmp(data, "user_xattr", 10) == 0) {
851 vol->no_xattr = 0;
852 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
853 vol->no_xattr = 1;
854 } else if (strnicmp(data, "user", 4) == 0) {
855 if (!value) {
856 printk(KERN_WARNING
857 "CIFS: invalid or missing username\n");
858 return 1; /* needs_arg; */
859 } else if (!*value) {
860 /* null user, ie anonymous, authentication */
861 vol->nullauth = 1;
862 }
863 if (strnlen(value, 200) < 200) {
864 vol->username = value;
865 } else {
866 printk(KERN_WARNING "CIFS: username too long\n");
867 return 1;
868 }
869 } else if (strnicmp(data, "pass", 4) == 0) {
870 if (!value) {
871 vol->password = NULL;
872 continue;
873 } else if (value[0] == 0) {
874 /* check if string begins with double comma
875 since that would mean the password really
876 does start with a comma, and would not
877 indicate an empty string */
878 if (value[1] != separator[0]) {
879 vol->password = NULL;
880 continue;
881 }
882 }
883 temp_len = strlen(value);
884 /* removed password length check, NTLM passwords
885 can be arbitrarily long */
886
887 /* if comma in password, the string will be
888 prematurely null terminated. Commas in password are
889 specified across the cifs mount interface by a double
890 comma ie ,, and a comma used as in other cases ie ','
891 as a parameter delimiter/separator is single and due
892 to the strsep above is temporarily zeroed. */
893
894 /* NB: password legally can have multiple commas and
895 the only illegal character in a password is null */
896
897 if ((value[temp_len] == 0) &&
898 (value[temp_len+1] == separator[0])) {
899 /* reinsert comma */
900 value[temp_len] = separator[0];
901 temp_len += 2; /* move after second comma */
902 while (value[temp_len] != 0) {
903 if (value[temp_len] == separator[0]) {
904 if (value[temp_len+1] ==
905 separator[0]) {
906 /* skip second comma */
907 temp_len++;
908 } else {
909 /* single comma indicating start
910 of next parm */
911 break;
912 }
913 }
914 temp_len++;
915 }
916 if (value[temp_len] == 0) {
917 options = NULL;
918 } else {
919 value[temp_len] = 0;
920 /* point option to start of next parm */
921 options = value + temp_len + 1;
922 }
923 /* go from value to value + temp_len condensing
924 double commas to singles. Note that this ends up
925 allocating a few bytes too many, which is ok */
926 vol->password = kzalloc(temp_len, GFP_KERNEL);
927 if (vol->password == NULL) {
928 printk(KERN_WARNING "CIFS: no memory "
929 "for password\n");
930 return 1;
931 }
932 for (i = 0, j = 0; i < temp_len; i++, j++) {
933 vol->password[j] = value[i];
934 if (value[i] == separator[0]
935 && value[i+1] == separator[0]) {
936 /* skip second comma */
937 i++;
938 }
939 }
940 vol->password[j] = 0;
941 } else {
942 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
943 if (vol->password == NULL) {
944 printk(KERN_WARNING "CIFS: no memory "
945 "for password\n");
946 return 1;
947 }
948 strcpy(vol->password, value);
949 }
950 } else if (!strnicmp(data, "ip", 2) ||
951 !strnicmp(data, "addr", 4)) {
952 if (!value || !*value) {
953 vol->UNCip = NULL;
954 } else if (strnlen(value, INET6_ADDRSTRLEN) <
955 INET6_ADDRSTRLEN) {
956 vol->UNCip = value;
957 } else {
958 printk(KERN_WARNING "CIFS: ip address "
959 "too long\n");
960 return 1;
961 }
962 } else if (strnicmp(data, "sec", 3) == 0) {
963 if (!value || !*value) {
964 cERROR(1, "no security value specified");
965 continue;
966 } else if (strnicmp(value, "krb5i", 5) == 0) {
967 vol->secFlg |= CIFSSEC_MAY_KRB5 |
968 CIFSSEC_MUST_SIGN;
969 } else if (strnicmp(value, "krb5p", 5) == 0) {
970 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
971 CIFSSEC_MAY_KRB5; */
972 cERROR(1, "Krb5 cifs privacy not supported");
973 return 1;
974 } else if (strnicmp(value, "krb5", 4) == 0) {
975 vol->secFlg |= CIFSSEC_MAY_KRB5;
976 #ifdef CONFIG_CIFS_EXPERIMENTAL
977 } else if (strnicmp(value, "ntlmsspi", 8) == 0) {
978 vol->secFlg |= CIFSSEC_MAY_NTLMSSP |
979 CIFSSEC_MUST_SIGN;
980 } else if (strnicmp(value, "ntlmssp", 7) == 0) {
981 vol->secFlg |= CIFSSEC_MAY_NTLMSSP;
982 #endif
983 } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
984 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
985 CIFSSEC_MUST_SIGN;
986 } else if (strnicmp(value, "ntlmv2", 6) == 0) {
987 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
988 } else if (strnicmp(value, "ntlmi", 5) == 0) {
989 vol->secFlg |= CIFSSEC_MAY_NTLM |
990 CIFSSEC_MUST_SIGN;
991 } else if (strnicmp(value, "ntlm", 4) == 0) {
992 /* ntlm is default so can be turned off too */
993 vol->secFlg |= CIFSSEC_MAY_NTLM;
994 } else if (strnicmp(value, "nontlm", 6) == 0) {
995 /* BB is there a better way to do this? */
996 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
997 #ifdef CONFIG_CIFS_WEAK_PW_HASH
998 } else if (strnicmp(value, "lanman", 6) == 0) {
999 vol->secFlg |= CIFSSEC_MAY_LANMAN;
1000 #endif
1001 } else if (strnicmp(value, "none", 4) == 0) {
1002 vol->nullauth = 1;
1003 } else {
1004 cERROR(1, "bad security option: %s", value);
1005 return 1;
1006 }
1007 } else if ((strnicmp(data, "unc", 3) == 0)
1008 || (strnicmp(data, "target", 6) == 0)
1009 || (strnicmp(data, "path", 4) == 0)) {
1010 if (!value || !*value) {
1011 printk(KERN_WARNING "CIFS: invalid path to "
1012 "network resource\n");
1013 return 1; /* needs_arg; */
1014 }
1015 if ((temp_len = strnlen(value, 300)) < 300) {
1016 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1017 if (vol->UNC == NULL)
1018 return 1;
1019 strcpy(vol->UNC, value);
1020 if (strncmp(vol->UNC, "//", 2) == 0) {
1021 vol->UNC[0] = '\\';
1022 vol->UNC[1] = '\\';
1023 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1024 printk(KERN_WARNING
1025 "CIFS: UNC Path does not begin "
1026 "with // or \\\\ \n");
1027 return 1;
1028 }
1029 } else {
1030 printk(KERN_WARNING "CIFS: UNC name too long\n");
1031 return 1;
1032 }
1033 } else if ((strnicmp(data, "domain", 3) == 0)
1034 || (strnicmp(data, "workgroup", 5) == 0)) {
1035 if (!value || !*value) {
1036 printk(KERN_WARNING "CIFS: invalid domain name\n");
1037 return 1; /* needs_arg; */
1038 }
1039 /* BB are there cases in which a comma can be valid in
1040 a domain name and need special handling? */
1041 if (strnlen(value, 256) < 256) {
1042 vol->domainname = value;
1043 cFYI(1, "Domain name set");
1044 } else {
1045 printk(KERN_WARNING "CIFS: domain name too "
1046 "long\n");
1047 return 1;
1048 }
1049 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1050 if (!value || !*value) {
1051 printk(KERN_WARNING
1052 "CIFS: invalid path prefix\n");
1053 return 1; /* needs_argument */
1054 }
1055 if ((temp_len = strnlen(value, 1024)) < 1024) {
1056 if (value[0] != '/')
1057 temp_len++; /* missing leading slash */
1058 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1059 if (vol->prepath == NULL)
1060 return 1;
1061 if (value[0] != '/') {
1062 vol->prepath[0] = '/';
1063 strcpy(vol->prepath+1, value);
1064 } else
1065 strcpy(vol->prepath, value);
1066 cFYI(1, "prefix path %s", vol->prepath);
1067 } else {
1068 printk(KERN_WARNING "CIFS: prefix too long\n");
1069 return 1;
1070 }
1071 } else if (strnicmp(data, "iocharset", 9) == 0) {
1072 if (!value || !*value) {
1073 printk(KERN_WARNING "CIFS: invalid iocharset "
1074 "specified\n");
1075 return 1; /* needs_arg; */
1076 }
1077 if (strnlen(value, 65) < 65) {
1078 if (strnicmp(value, "default", 7))
1079 vol->iocharset = value;
1080 /* if iocharset not set then load_nls_default
1081 is used by caller */
1082 cFYI(1, "iocharset set to %s", value);
1083 } else {
1084 printk(KERN_WARNING "CIFS: iocharset name "
1085 "too long.\n");
1086 return 1;
1087 }
1088 } else if (!strnicmp(data, "uid", 3) && value && *value) {
1089 vol->linux_uid = simple_strtoul(value, &value, 0);
1090 uid_specified = true;
1091 } else if (!strnicmp(data, "forceuid", 8)) {
1092 override_uid = 1;
1093 } else if (!strnicmp(data, "noforceuid", 10)) {
1094 override_uid = 0;
1095 } else if (!strnicmp(data, "gid", 3) && value && *value) {
1096 vol->linux_gid = simple_strtoul(value, &value, 0);
1097 gid_specified = true;
1098 } else if (!strnicmp(data, "forcegid", 8)) {
1099 override_gid = 1;
1100 } else if (!strnicmp(data, "noforcegid", 10)) {
1101 override_gid = 0;
1102 } else if (strnicmp(data, "file_mode", 4) == 0) {
1103 if (value && *value) {
1104 vol->file_mode =
1105 simple_strtoul(value, &value, 0);
1106 }
1107 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1108 if (value && *value) {
1109 vol->dir_mode =
1110 simple_strtoul(value, &value, 0);
1111 }
1112 } else if (strnicmp(data, "dirmode", 4) == 0) {
1113 if (value && *value) {
1114 vol->dir_mode =
1115 simple_strtoul(value, &value, 0);
1116 }
1117 } else if (strnicmp(data, "port", 4) == 0) {
1118 if (value && *value) {
1119 vol->port =
1120 simple_strtoul(value, &value, 0);
1121 }
1122 } else if (strnicmp(data, "rsize", 5) == 0) {
1123 if (value && *value) {
1124 vol->rsize =
1125 simple_strtoul(value, &value, 0);
1126 }
1127 } else if (strnicmp(data, "wsize", 5) == 0) {
1128 if (value && *value) {
1129 vol->wsize =
1130 simple_strtoul(value, &value, 0);
1131 }
1132 } else if (strnicmp(data, "sockopt", 5) == 0) {
1133 if (!value || !*value) {
1134 cERROR(1, "no socket option specified");
1135 continue;
1136 } else if (strnicmp(value, "TCP_NODELAY", 11) == 0) {
1137 vol->sockopt_tcp_nodelay = 1;
1138 }
1139 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1140 if (!value || !*value || (*value == ' ')) {
1141 cFYI(1, "invalid (empty) netbiosname");
1142 } else {
1143 memset(vol->source_rfc1001_name, 0x20, 15);
1144 for (i = 0; i < 15; i++) {
1145 /* BB are there cases in which a comma can be
1146 valid in this workstation netbios name (and need
1147 special handling)? */
1148
1149 /* We do not uppercase netbiosname for user */
1150 if (value[i] == 0)
1151 break;
1152 else
1153 vol->source_rfc1001_name[i] =
1154 value[i];
1155 }
1156 /* The string has 16th byte zero still from
1157 set at top of the function */
1158 if ((i == 15) && (value[i] != 0))
1159 printk(KERN_WARNING "CIFS: netbiosname"
1160 " longer than 15 truncated.\n");
1161 }
1162 } else if (strnicmp(data, "servern", 7) == 0) {
1163 /* servernetbiosname specified override *SMBSERVER */
1164 if (!value || !*value || (*value == ' ')) {
1165 cFYI(1, "empty server netbiosname specified");
1166 } else {
1167 /* last byte, type, is 0x20 for servr type */
1168 memset(vol->target_rfc1001_name, 0x20, 16);
1169
1170 for (i = 0; i < 15; i++) {
1171 /* BB are there cases in which a comma can be
1172 valid in this workstation netbios name
1173 (and need special handling)? */
1174
1175 /* user or mount helper must uppercase
1176 the netbiosname */
1177 if (value[i] == 0)
1178 break;
1179 else
1180 vol->target_rfc1001_name[i] =
1181 value[i];
1182 }
1183 /* The string has 16th byte zero still from
1184 set at top of the function */
1185 if ((i == 15) && (value[i] != 0))
1186 printk(KERN_WARNING "CIFS: server net"
1187 "biosname longer than 15 truncated.\n");
1188 }
1189 } else if (strnicmp(data, "credentials", 4) == 0) {
1190 /* ignore */
1191 } else if (strnicmp(data, "version", 3) == 0) {
1192 /* ignore */
1193 } else if (strnicmp(data, "guest", 5) == 0) {
1194 /* ignore */
1195 } else if (strnicmp(data, "rw", 2) == 0) {
1196 /* ignore */
1197 } else if (strnicmp(data, "ro", 2) == 0) {
1198 /* ignore */
1199 } else if (strnicmp(data, "noblocksend", 11) == 0) {
1200 vol->noblocksnd = 1;
1201 } else if (strnicmp(data, "noautotune", 10) == 0) {
1202 vol->noautotune = 1;
1203 } else if ((strnicmp(data, "suid", 4) == 0) ||
1204 (strnicmp(data, "nosuid", 6) == 0) ||
1205 (strnicmp(data, "exec", 4) == 0) ||
1206 (strnicmp(data, "noexec", 6) == 0) ||
1207 (strnicmp(data, "nodev", 5) == 0) ||
1208 (strnicmp(data, "noauto", 6) == 0) ||
1209 (strnicmp(data, "dev", 3) == 0)) {
1210 /* The mount tool or mount.cifs helper (if present)
1211 uses these opts to set flags, and the flags are read
1212 by the kernel vfs layer before we get here (ie
1213 before read super) so there is no point trying to
1214 parse these options again and set anything and it
1215 is ok to just ignore them */
1216 continue;
1217 } else if (strnicmp(data, "hard", 4) == 0) {
1218 vol->retry = 1;
1219 } else if (strnicmp(data, "soft", 4) == 0) {
1220 vol->retry = 0;
1221 } else if (strnicmp(data, "perm", 4) == 0) {
1222 vol->noperm = 0;
1223 } else if (strnicmp(data, "noperm", 6) == 0) {
1224 vol->noperm = 1;
1225 } else if (strnicmp(data, "mapchars", 8) == 0) {
1226 vol->remap = 1;
1227 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1228 vol->remap = 0;
1229 } else if (strnicmp(data, "sfu", 3) == 0) {
1230 vol->sfu_emul = 1;
1231 } else if (strnicmp(data, "nosfu", 5) == 0) {
1232 vol->sfu_emul = 0;
1233 } else if (strnicmp(data, "nodfs", 5) == 0) {
1234 vol->nodfs = 1;
1235 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1236 vol->posix_paths = 1;
1237 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1238 vol->posix_paths = 0;
1239 } else if (strnicmp(data, "nounix", 6) == 0) {
1240 vol->no_linux_ext = 1;
1241 } else if (strnicmp(data, "nolinux", 7) == 0) {
1242 vol->no_linux_ext = 1;
1243 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1244 (strnicmp(data, "ignorecase", 10) == 0)) {
1245 vol->nocase = 1;
1246 } else if (strnicmp(data, "mand", 4) == 0) {
1247 /* ignore */
1248 } else if (strnicmp(data, "nomand", 6) == 0) {
1249 /* ignore */
1250 } else if (strnicmp(data, "_netdev", 7) == 0) {
1251 /* ignore */
1252 } else if (strnicmp(data, "brl", 3) == 0) {
1253 vol->nobrl = 0;
1254 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1255 (strnicmp(data, "nolock", 6) == 0)) {
1256 vol->nobrl = 1;
1257 /* turn off mandatory locking in mode
1258 if remote locking is turned off since the
1259 local vfs will do advisory */
1260 if (vol->file_mode ==
1261 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1262 vol->file_mode = S_IALLUGO;
1263 } else if (strnicmp(data, "forcemandatorylock", 9) == 0) {
1264 /* will take the shorter form "forcemand" as well */
1265 /* This mount option will force use of mandatory
1266 (DOS/Windows style) byte range locks, instead of
1267 using posix advisory byte range locks, even if the
1268 Unix extensions are available and posix locks would
1269 be supported otherwise. If Unix extensions are not
1270 negotiated this has no effect since mandatory locks
1271 would be used (mandatory locks is all that those
1272 those servers support) */
1273 vol->mand_lock = 1;
1274 } else if (strnicmp(data, "setuids", 7) == 0) {
1275 vol->setuids = 1;
1276 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1277 vol->setuids = 0;
1278 } else if (strnicmp(data, "dynperm", 7) == 0) {
1279 vol->dynperm = true;
1280 } else if (strnicmp(data, "nodynperm", 9) == 0) {
1281 vol->dynperm = false;
1282 } else if (strnicmp(data, "nohard", 6) == 0) {
1283 vol->retry = 0;
1284 } else if (strnicmp(data, "nosoft", 6) == 0) {
1285 vol->retry = 1;
1286 } else if (strnicmp(data, "nointr", 6) == 0) {
1287 vol->intr = 0;
1288 } else if (strnicmp(data, "intr", 4) == 0) {
1289 vol->intr = 1;
1290 } else if (strnicmp(data, "nostrictsync", 12) == 0) {
1291 vol->nostrictsync = 1;
1292 } else if (strnicmp(data, "strictsync", 10) == 0) {
1293 vol->nostrictsync = 0;
1294 } else if (strnicmp(data, "serverino", 7) == 0) {
1295 vol->server_ino = 1;
1296 } else if (strnicmp(data, "noserverino", 9) == 0) {
1297 vol->server_ino = 0;
1298 } else if (strnicmp(data, "cifsacl", 7) == 0) {
1299 vol->cifs_acl = 1;
1300 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1301 vol->cifs_acl = 0;
1302 } else if (strnicmp(data, "acl", 3) == 0) {
1303 vol->no_psx_acl = 0;
1304 } else if (strnicmp(data, "noacl", 5) == 0) {
1305 vol->no_psx_acl = 1;
1306 #ifdef CONFIG_CIFS_EXPERIMENTAL
1307 } else if (strnicmp(data, "locallease", 6) == 0) {
1308 vol->local_lease = 1;
1309 #endif
1310 } else if (strnicmp(data, "sign", 4) == 0) {
1311 vol->secFlg |= CIFSSEC_MUST_SIGN;
1312 } else if (strnicmp(data, "seal", 4) == 0) {
1313 /* we do not do the following in secFlags because seal
1314 is a per tree connection (mount) not a per socket
1315 or per-smb connection option in the protocol */
1316 /* vol->secFlg |= CIFSSEC_MUST_SEAL; */
1317 vol->seal = 1;
1318 } else if (strnicmp(data, "direct", 6) == 0) {
1319 vol->direct_io = 1;
1320 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
1321 vol->direct_io = 1;
1322 } else if (strnicmp(data, "noac", 4) == 0) {
1323 printk(KERN_WARNING "CIFS: Mount option noac not "
1324 "supported. Instead set "
1325 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1326 } else if (strnicmp(data, "fsc", 3) == 0) {
1327 vol->fsc = true;
1328 } else
1329 printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1330 data);
1331 }
1332 if (vol->UNC == NULL) {
1333 if (devname == NULL) {
1334 printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1335 "target\n");
1336 return 1;
1337 }
1338 if ((temp_len = strnlen(devname, 300)) < 300) {
1339 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1340 if (vol->UNC == NULL)
1341 return 1;
1342 strcpy(vol->UNC, devname);
1343 if (strncmp(vol->UNC, "//", 2) == 0) {
1344 vol->UNC[0] = '\\';
1345 vol->UNC[1] = '\\';
1346 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1347 printk(KERN_WARNING "CIFS: UNC Path does not "
1348 "begin with // or \\\\ \n");
1349 return 1;
1350 }
1351 value = strpbrk(vol->UNC+2, "/\\");
1352 if (value)
1353 *value = '\\';
1354 } else {
1355 printk(KERN_WARNING "CIFS: UNC name too long\n");
1356 return 1;
1357 }
1358 }
1359 if (vol->UNCip == NULL)
1360 vol->UNCip = &vol->UNC[2];
1361
1362 if (uid_specified)
1363 vol->override_uid = override_uid;
1364 else if (override_uid == 1)
1365 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1366 "specified with no uid= option.\n");
1367
1368 if (gid_specified)
1369 vol->override_gid = override_gid;
1370 else if (override_gid == 1)
1371 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1372 "specified with no gid= option.\n");
1373
1374 return 0;
1375 }
1376
1377 static bool
1378 match_address(struct TCP_Server_Info *server, struct sockaddr *addr)
1379 {
1380 struct sockaddr_in *addr4 = (struct sockaddr_in *)addr;
1381 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr;
1382
1383 switch (addr->sa_family) {
1384 case AF_INET:
1385 if (addr4->sin_addr.s_addr !=
1386 server->addr.sockAddr.sin_addr.s_addr)
1387 return false;
1388 if (addr4->sin_port &&
1389 addr4->sin_port != server->addr.sockAddr.sin_port)
1390 return false;
1391 break;
1392 case AF_INET6:
1393 if (!ipv6_addr_equal(&addr6->sin6_addr,
1394 &server->addr.sockAddr6.sin6_addr))
1395 return false;
1396 if (addr6->sin6_scope_id !=
1397 server->addr.sockAddr6.sin6_scope_id)
1398 return false;
1399 if (addr6->sin6_port &&
1400 addr6->sin6_port != server->addr.sockAddr6.sin6_port)
1401 return false;
1402 break;
1403 }
1404
1405 return true;
1406 }
1407
1408 static bool
1409 match_security(struct TCP_Server_Info *server, struct smb_vol *vol)
1410 {
1411 unsigned int secFlags;
1412
1413 if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL)))
1414 secFlags = vol->secFlg;
1415 else
1416 secFlags = global_secflags | vol->secFlg;
1417
1418 switch (server->secType) {
1419 case LANMAN:
1420 if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT)))
1421 return false;
1422 break;
1423 case NTLMv2:
1424 if (!(secFlags & CIFSSEC_MAY_NTLMV2))
1425 return false;
1426 break;
1427 case NTLM:
1428 if (!(secFlags & CIFSSEC_MAY_NTLM))
1429 return false;
1430 break;
1431 case Kerberos:
1432 if (!(secFlags & CIFSSEC_MAY_KRB5))
1433 return false;
1434 break;
1435 case RawNTLMSSP:
1436 if (!(secFlags & CIFSSEC_MAY_NTLMSSP))
1437 return false;
1438 break;
1439 default:
1440 /* shouldn't happen */
1441 return false;
1442 }
1443
1444 /* now check if signing mode is acceptible */
1445 if ((secFlags & CIFSSEC_MAY_SIGN) == 0 &&
1446 (server->secMode & SECMODE_SIGN_REQUIRED))
1447 return false;
1448 else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) &&
1449 (server->secMode &
1450 (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0)
1451 return false;
1452
1453 return true;
1454 }
1455
1456 static struct TCP_Server_Info *
1457 cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol)
1458 {
1459 struct TCP_Server_Info *server;
1460
1461 write_lock(&cifs_tcp_ses_lock);
1462 list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) {
1463 /*
1464 * the demux thread can exit on its own while still in CifsNew
1465 * so don't accept any sockets in that state. Since the
1466 * tcpStatus never changes back to CifsNew it's safe to check
1467 * for this without a lock.
1468 */
1469 if (server->tcpStatus == CifsNew)
1470 continue;
1471
1472 if (!match_address(server, addr))
1473 continue;
1474
1475 if (!match_security(server, vol))
1476 continue;
1477
1478 ++server->srv_count;
1479 write_unlock(&cifs_tcp_ses_lock);
1480 cFYI(1, "Existing tcp session with server found");
1481 return server;
1482 }
1483 write_unlock(&cifs_tcp_ses_lock);
1484 return NULL;
1485 }
1486
1487 static void
1488 cifs_put_tcp_session(struct TCP_Server_Info *server)
1489 {
1490 struct task_struct *task;
1491
1492 write_lock(&cifs_tcp_ses_lock);
1493 if (--server->srv_count > 0) {
1494 write_unlock(&cifs_tcp_ses_lock);
1495 return;
1496 }
1497
1498 list_del_init(&server->tcp_ses_list);
1499 write_unlock(&cifs_tcp_ses_lock);
1500
1501 spin_lock(&GlobalMid_Lock);
1502 server->tcpStatus = CifsExiting;
1503 spin_unlock(&GlobalMid_Lock);
1504
1505 cifs_fscache_release_client_cookie(server);
1506
1507 task = xchg(&server->tsk, NULL);
1508 if (task)
1509 force_sig(SIGKILL, task);
1510 }
1511
1512 static struct TCP_Server_Info *
1513 cifs_get_tcp_session(struct smb_vol *volume_info)
1514 {
1515 struct TCP_Server_Info *tcp_ses = NULL;
1516 struct sockaddr_storage addr;
1517 struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
1518 struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
1519 int rc;
1520
1521 memset(&addr, 0, sizeof(struct sockaddr_storage));
1522
1523 cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip);
1524
1525 if (volume_info->UNCip && volume_info->UNC) {
1526 rc = cifs_fill_sockaddr((struct sockaddr *)&addr,
1527 volume_info->UNCip,
1528 strlen(volume_info->UNCip),
1529 volume_info->port);
1530 if (!rc) {
1531 /* we failed translating address */
1532 rc = -EINVAL;
1533 goto out_err;
1534 }
1535 } else if (volume_info->UNCip) {
1536 /* BB using ip addr as tcp_ses name to connect to the
1537 DFS root below */
1538 cERROR(1, "Connecting to DFS root not implemented yet");
1539 rc = -EINVAL;
1540 goto out_err;
1541 } else /* which tcp_sess DFS root would we conect to */ {
1542 cERROR(1, "CIFS mount error: No UNC path (e.g. -o "
1543 "unc=//192.168.1.100/public) specified");
1544 rc = -EINVAL;
1545 goto out_err;
1546 }
1547
1548 /* see if we already have a matching tcp_ses */
1549 tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info);
1550 if (tcp_ses)
1551 return tcp_ses;
1552
1553 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1554 if (!tcp_ses) {
1555 rc = -ENOMEM;
1556 goto out_err;
1557 }
1558
1559 tcp_ses->hostname = extract_hostname(volume_info->UNC);
1560 if (IS_ERR(tcp_ses->hostname)) {
1561 rc = PTR_ERR(tcp_ses->hostname);
1562 goto out_err;
1563 }
1564
1565 tcp_ses->noblocksnd = volume_info->noblocksnd;
1566 tcp_ses->noautotune = volume_info->noautotune;
1567 tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay;
1568 atomic_set(&tcp_ses->inFlight, 0);
1569 init_waitqueue_head(&tcp_ses->response_q);
1570 init_waitqueue_head(&tcp_ses->request_q);
1571 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
1572 mutex_init(&tcp_ses->srv_mutex);
1573 memcpy(tcp_ses->workstation_RFC1001_name,
1574 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1575 memcpy(tcp_ses->server_RFC1001_name,
1576 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1577 tcp_ses->sequence_number = 0;
1578 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
1579 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
1580
1581 /*
1582 * at this point we are the only ones with the pointer
1583 * to the struct since the kernel thread not created yet
1584 * no need to spinlock this init of tcpStatus or srv_count
1585 */
1586 tcp_ses->tcpStatus = CifsNew;
1587 ++tcp_ses->srv_count;
1588
1589 if (addr.ss_family == AF_INET6) {
1590 cFYI(1, "attempting ipv6 connect");
1591 /* BB should we allow ipv6 on port 139? */
1592 /* other OS never observed in Wild doing 139 with v6 */
1593 memcpy(&tcp_ses->addr.sockAddr6, sin_server6,
1594 sizeof(struct sockaddr_in6));
1595 rc = ipv6_connect(tcp_ses);
1596 } else {
1597 memcpy(&tcp_ses->addr.sockAddr, sin_server,
1598 sizeof(struct sockaddr_in));
1599 rc = ipv4_connect(tcp_ses);
1600 }
1601 if (rc < 0) {
1602 cERROR(1, "Error connecting to socket. Aborting operation");
1603 goto out_err;
1604 }
1605
1606 /*
1607 * since we're in a cifs function already, we know that
1608 * this will succeed. No need for try_module_get().
1609 */
1610 __module_get(THIS_MODULE);
1611 tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread,
1612 tcp_ses, "cifsd");
1613 if (IS_ERR(tcp_ses->tsk)) {
1614 rc = PTR_ERR(tcp_ses->tsk);
1615 cERROR(1, "error %d create cifsd thread", rc);
1616 module_put(THIS_MODULE);
1617 goto out_err;
1618 }
1619
1620 /* thread spawned, put it on the list */
1621 write_lock(&cifs_tcp_ses_lock);
1622 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
1623 write_unlock(&cifs_tcp_ses_lock);
1624
1625 cifs_fscache_get_client_cookie(tcp_ses);
1626
1627 return tcp_ses;
1628
1629 out_err:
1630 if (tcp_ses) {
1631 if (!IS_ERR(tcp_ses->hostname))
1632 kfree(tcp_ses->hostname);
1633 if (tcp_ses->ssocket)
1634 sock_release(tcp_ses->ssocket);
1635 kfree(tcp_ses);
1636 }
1637 return ERR_PTR(rc);
1638 }
1639
1640 static struct cifsSesInfo *
1641 cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
1642 {
1643 struct cifsSesInfo *ses;
1644
1645 write_lock(&cifs_tcp_ses_lock);
1646 list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
1647 switch (server->secType) {
1648 case Kerberos:
1649 if (vol->cred_uid != ses->cred_uid)
1650 continue;
1651 break;
1652 default:
1653 /* anything else takes username/password */
1654 if (strncmp(ses->userName, vol->username,
1655 MAX_USERNAME_SIZE))
1656 continue;
1657 if (strlen(vol->username) != 0 &&
1658 ses->password != NULL &&
1659 strncmp(ses->password,
1660 vol->password ? vol->password : "",
1661 MAX_PASSWORD_SIZE))
1662 continue;
1663 }
1664 ++ses->ses_count;
1665 write_unlock(&cifs_tcp_ses_lock);
1666 return ses;
1667 }
1668 write_unlock(&cifs_tcp_ses_lock);
1669 return NULL;
1670 }
1671
1672 static void
1673 cifs_put_smb_ses(struct cifsSesInfo *ses)
1674 {
1675 int xid;
1676 struct TCP_Server_Info *server = ses->server;
1677
1678 cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count);
1679 write_lock(&cifs_tcp_ses_lock);
1680 if (--ses->ses_count > 0) {
1681 write_unlock(&cifs_tcp_ses_lock);
1682 return;
1683 }
1684
1685 list_del_init(&ses->smb_ses_list);
1686 write_unlock(&cifs_tcp_ses_lock);
1687
1688 if (ses->status == CifsGood) {
1689 xid = GetXid();
1690 CIFSSMBLogoff(xid, ses);
1691 _FreeXid(xid);
1692 }
1693 sesInfoFree(ses);
1694 cifs_put_tcp_session(server);
1695 }
1696
1697 static struct cifsSesInfo *
1698 cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
1699 {
1700 int rc = -ENOMEM, xid;
1701 struct cifsSesInfo *ses;
1702
1703 xid = GetXid();
1704
1705 ses = cifs_find_smb_ses(server, volume_info);
1706 if (ses) {
1707 cFYI(1, "Existing smb sess found (status=%d)", ses->status);
1708
1709 mutex_lock(&ses->session_mutex);
1710 rc = cifs_negotiate_protocol(xid, ses);
1711 if (rc) {
1712 mutex_unlock(&ses->session_mutex);
1713 /* problem -- put our ses reference */
1714 cifs_put_smb_ses(ses);
1715 FreeXid(xid);
1716 return ERR_PTR(rc);
1717 }
1718 if (ses->need_reconnect) {
1719 cFYI(1, "Session needs reconnect");
1720 rc = cifs_setup_session(xid, ses,
1721 volume_info->local_nls);
1722 if (rc) {
1723 mutex_unlock(&ses->session_mutex);
1724 /* problem -- put our reference */
1725 cifs_put_smb_ses(ses);
1726 FreeXid(xid);
1727 return ERR_PTR(rc);
1728 }
1729 }
1730 mutex_unlock(&ses->session_mutex);
1731
1732 /* existing SMB ses has a server reference already */
1733 cifs_put_tcp_session(server);
1734 FreeXid(xid);
1735 return ses;
1736 }
1737
1738 cFYI(1, "Existing smb sess not found");
1739 ses = sesInfoAlloc();
1740 if (ses == NULL)
1741 goto get_ses_fail;
1742
1743 /* new SMB session uses our server ref */
1744 ses->server = server;
1745 if (server->addr.sockAddr6.sin6_family == AF_INET6)
1746 sprintf(ses->serverName, "%pI6",
1747 &server->addr.sockAddr6.sin6_addr);
1748 else
1749 sprintf(ses->serverName, "%pI4",
1750 &server->addr.sockAddr.sin_addr.s_addr);
1751
1752 if (volume_info->username)
1753 strncpy(ses->userName, volume_info->username,
1754 MAX_USERNAME_SIZE);
1755
1756 /* volume_info->password freed at unmount */
1757 if (volume_info->password) {
1758 ses->password = kstrdup(volume_info->password, GFP_KERNEL);
1759 if (!ses->password)
1760 goto get_ses_fail;
1761 }
1762 if (volume_info->domainname) {
1763 int len = strlen(volume_info->domainname);
1764 ses->domainName = kmalloc(len + 1, GFP_KERNEL);
1765 if (ses->domainName)
1766 strcpy(ses->domainName, volume_info->domainname);
1767 }
1768 ses->cred_uid = volume_info->cred_uid;
1769 ses->linux_uid = volume_info->linux_uid;
1770 ses->overrideSecFlg = volume_info->secFlg;
1771
1772 mutex_lock(&ses->session_mutex);
1773 rc = cifs_negotiate_protocol(xid, ses);
1774 if (!rc)
1775 rc = cifs_setup_session(xid, ses, volume_info->local_nls);
1776 mutex_unlock(&ses->session_mutex);
1777 if (rc)
1778 goto get_ses_fail;
1779
1780 /* success, put it on the list */
1781 write_lock(&cifs_tcp_ses_lock);
1782 list_add(&ses->smb_ses_list, &server->smb_ses_list);
1783 write_unlock(&cifs_tcp_ses_lock);
1784
1785 FreeXid(xid);
1786 return ses;
1787
1788 get_ses_fail:
1789 sesInfoFree(ses);
1790 FreeXid(xid);
1791 return ERR_PTR(rc);
1792 }
1793
1794 static struct cifsTconInfo *
1795 cifs_find_tcon(struct cifsSesInfo *ses, const char *unc)
1796 {
1797 struct list_head *tmp;
1798 struct cifsTconInfo *tcon;
1799
1800 write_lock(&cifs_tcp_ses_lock);
1801 list_for_each(tmp, &ses->tcon_list) {
1802 tcon = list_entry(tmp, struct cifsTconInfo, tcon_list);
1803 if (tcon->tidStatus == CifsExiting)
1804 continue;
1805 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
1806 continue;
1807
1808 ++tcon->tc_count;
1809 write_unlock(&cifs_tcp_ses_lock);
1810 return tcon;
1811 }
1812 write_unlock(&cifs_tcp_ses_lock);
1813 return NULL;
1814 }
1815
1816 static void
1817 cifs_put_tcon(struct cifsTconInfo *tcon)
1818 {
1819 int xid;
1820 struct cifsSesInfo *ses = tcon->ses;
1821
1822 cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count);
1823 write_lock(&cifs_tcp_ses_lock);
1824 if (--tcon->tc_count > 0) {
1825 write_unlock(&cifs_tcp_ses_lock);
1826 return;
1827 }
1828
1829 list_del_init(&tcon->tcon_list);
1830 write_unlock(&cifs_tcp_ses_lock);
1831
1832 xid = GetXid();
1833 CIFSSMBTDis(xid, tcon);
1834 _FreeXid(xid);
1835
1836 cifs_fscache_release_super_cookie(tcon);
1837 tconInfoFree(tcon);
1838 cifs_put_smb_ses(ses);
1839 }
1840
1841 static struct cifsTconInfo *
1842 cifs_get_tcon(struct cifsSesInfo *ses, struct smb_vol *volume_info)
1843 {
1844 int rc, xid;
1845 struct cifsTconInfo *tcon;
1846
1847 tcon = cifs_find_tcon(ses, volume_info->UNC);
1848 if (tcon) {
1849 cFYI(1, "Found match on UNC path");
1850 /* existing tcon already has a reference */
1851 cifs_put_smb_ses(ses);
1852 if (tcon->seal != volume_info->seal)
1853 cERROR(1, "transport encryption setting "
1854 "conflicts with existing tid");
1855 return tcon;
1856 }
1857
1858 tcon = tconInfoAlloc();
1859 if (tcon == NULL) {
1860 rc = -ENOMEM;
1861 goto out_fail;
1862 }
1863
1864 tcon->ses = ses;
1865 if (volume_info->password) {
1866 tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
1867 if (!tcon->password) {
1868 rc = -ENOMEM;
1869 goto out_fail;
1870 }
1871 }
1872
1873 if (strchr(volume_info->UNC + 3, '\\') == NULL
1874 && strchr(volume_info->UNC + 3, '/') == NULL) {
1875 cERROR(1, "Missing share name");
1876 rc = -ENODEV;
1877 goto out_fail;
1878 }
1879
1880 /* BB Do we need to wrap session_mutex around
1881 * this TCon call and Unix SetFS as
1882 * we do on SessSetup and reconnect? */
1883 xid = GetXid();
1884 rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls);
1885 FreeXid(xid);
1886 cFYI(1, "CIFS Tcon rc = %d", rc);
1887 if (rc)
1888 goto out_fail;
1889
1890 if (volume_info->nodfs) {
1891 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
1892 cFYI(1, "DFS disabled (%d)", tcon->Flags);
1893 }
1894 tcon->seal = volume_info->seal;
1895 /* we can have only one retry value for a connection
1896 to a share so for resources mounted more than once
1897 to the same server share the last value passed in
1898 for the retry flag is used */
1899 tcon->retry = volume_info->retry;
1900 tcon->nocase = volume_info->nocase;
1901 tcon->local_lease = volume_info->local_lease;
1902
1903 write_lock(&cifs_tcp_ses_lock);
1904 list_add(&tcon->tcon_list, &ses->tcon_list);
1905 write_unlock(&cifs_tcp_ses_lock);
1906
1907 cifs_fscache_get_super_cookie(tcon);
1908
1909 return tcon;
1910
1911 out_fail:
1912 tconInfoFree(tcon);
1913 return ERR_PTR(rc);
1914 }
1915
1916
1917 int
1918 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
1919 const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
1920 struct dfs_info3_param **preferrals, int remap)
1921 {
1922 char *temp_unc;
1923 int rc = 0;
1924
1925 *pnum_referrals = 0;
1926 *preferrals = NULL;
1927
1928 if (pSesInfo->ipc_tid == 0) {
1929 temp_unc = kmalloc(2 /* for slashes */ +
1930 strnlen(pSesInfo->serverName,
1931 SERVER_NAME_LEN_WITH_NULL * 2)
1932 + 1 + 4 /* slash IPC$ */ + 2,
1933 GFP_KERNEL);
1934 if (temp_unc == NULL)
1935 return -ENOMEM;
1936 temp_unc[0] = '\\';
1937 temp_unc[1] = '\\';
1938 strcpy(temp_unc + 2, pSesInfo->serverName);
1939 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1940 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1941 cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid);
1942 kfree(temp_unc);
1943 }
1944 if (rc == 0)
1945 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1946 pnum_referrals, nls_codepage, remap);
1947 /* BB map targetUNCs to dfs_info3 structures, here or
1948 in CIFSGetDFSRefer BB */
1949
1950 return rc;
1951 }
1952
1953 #ifdef CONFIG_DEBUG_LOCK_ALLOC
1954 static struct lock_class_key cifs_key[2];
1955 static struct lock_class_key cifs_slock_key[2];
1956
1957 static inline void
1958 cifs_reclassify_socket4(struct socket *sock)
1959 {
1960 struct sock *sk = sock->sk;
1961 BUG_ON(sock_owned_by_user(sk));
1962 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
1963 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
1964 }
1965
1966 static inline void
1967 cifs_reclassify_socket6(struct socket *sock)
1968 {
1969 struct sock *sk = sock->sk;
1970 BUG_ON(sock_owned_by_user(sk));
1971 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
1972 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
1973 }
1974 #else
1975 static inline void
1976 cifs_reclassify_socket4(struct socket *sock)
1977 {
1978 }
1979
1980 static inline void
1981 cifs_reclassify_socket6(struct socket *sock)
1982 {
1983 }
1984 #endif
1985
1986 /* See RFC1001 section 14 on representation of Netbios names */
1987 static void rfc1002mangle(char *target, char *source, unsigned int length)
1988 {
1989 unsigned int i, j;
1990
1991 for (i = 0, j = 0; i < (length); i++) {
1992 /* mask a nibble at a time and encode */
1993 target[j] = 'A' + (0x0F & (source[i] >> 4));
1994 target[j+1] = 'A' + (0x0F & source[i]);
1995 j += 2;
1996 }
1997
1998 }
1999
2000
2001 static int
2002 ipv4_connect(struct TCP_Server_Info *server)
2003 {
2004 int rc = 0;
2005 int val;
2006 bool connected = false;
2007 __be16 orig_port = 0;
2008 struct socket *socket = server->ssocket;
2009
2010 if (socket == NULL) {
2011 rc = sock_create_kern(PF_INET, SOCK_STREAM,
2012 IPPROTO_TCP, &socket);
2013 if (rc < 0) {
2014 cERROR(1, "Error %d creating socket", rc);
2015 return rc;
2016 }
2017
2018 /* BB other socket options to set KEEPALIVE, NODELAY? */
2019 cFYI(1, "Socket created");
2020 server->ssocket = socket;
2021 socket->sk->sk_allocation = GFP_NOFS;
2022 cifs_reclassify_socket4(socket);
2023 }
2024
2025 /* user overrode default port */
2026 if (server->addr.sockAddr.sin_port) {
2027 rc = socket->ops->connect(socket, (struct sockaddr *)
2028 &server->addr.sockAddr,
2029 sizeof(struct sockaddr_in), 0);
2030 if (rc >= 0)
2031 connected = true;
2032 }
2033
2034 if (!connected) {
2035 /* save original port so we can retry user specified port
2036 later if fall back ports fail this time */
2037 orig_port = server->addr.sockAddr.sin_port;
2038
2039 /* do not retry on the same port we just failed on */
2040 if (server->addr.sockAddr.sin_port != htons(CIFS_PORT)) {
2041 server->addr.sockAddr.sin_port = htons(CIFS_PORT);
2042 rc = socket->ops->connect(socket,
2043 (struct sockaddr *)
2044 &server->addr.sockAddr,
2045 sizeof(struct sockaddr_in), 0);
2046 if (rc >= 0)
2047 connected = true;
2048 }
2049 }
2050 if (!connected) {
2051 server->addr.sockAddr.sin_port = htons(RFC1001_PORT);
2052 rc = socket->ops->connect(socket, (struct sockaddr *)
2053 &server->addr.sockAddr,
2054 sizeof(struct sockaddr_in), 0);
2055 if (rc >= 0)
2056 connected = true;
2057 }
2058
2059 /* give up here - unless we want to retry on different
2060 protocol families some day */
2061 if (!connected) {
2062 if (orig_port)
2063 server->addr.sockAddr.sin_port = orig_port;
2064 cFYI(1, "Error %d connecting to server via ipv4", rc);
2065 sock_release(socket);
2066 server->ssocket = NULL;
2067 return rc;
2068 }
2069
2070
2071 /*
2072 * Eventually check for other socket options to change from
2073 * the default. sock_setsockopt not used because it expects
2074 * user space buffer
2075 */
2076 socket->sk->sk_rcvtimeo = 7 * HZ;
2077 socket->sk->sk_sndtimeo = 5 * HZ;
2078
2079 /* make the bufsizes depend on wsize/rsize and max requests */
2080 if (server->noautotune) {
2081 if (socket->sk->sk_sndbuf < (200 * 1024))
2082 socket->sk->sk_sndbuf = 200 * 1024;
2083 if (socket->sk->sk_rcvbuf < (140 * 1024))
2084 socket->sk->sk_rcvbuf = 140 * 1024;
2085 }
2086
2087 if (server->tcp_nodelay) {
2088 val = 1;
2089 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
2090 (char *)&val, sizeof(val));
2091 if (rc)
2092 cFYI(1, "set TCP_NODELAY socket option error %d", rc);
2093 }
2094
2095 cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
2096 socket->sk->sk_sndbuf,
2097 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo);
2098
2099 /* send RFC1001 sessinit */
2100 if (server->addr.sockAddr.sin_port == htons(RFC1001_PORT)) {
2101 /* some servers require RFC1001 sessinit before sending
2102 negprot - BB check reconnection in case where second
2103 sessinit is sent but no second negprot */
2104 struct rfc1002_session_packet *ses_init_buf;
2105 struct smb_hdr *smb_buf;
2106 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
2107 GFP_KERNEL);
2108 if (ses_init_buf) {
2109 ses_init_buf->trailer.session_req.called_len = 32;
2110 if (server->server_RFC1001_name &&
2111 server->server_RFC1001_name[0] != 0)
2112 rfc1002mangle(ses_init_buf->trailer.
2113 session_req.called_name,
2114 server->server_RFC1001_name,
2115 RFC1001_NAME_LEN_WITH_NULL);
2116 else
2117 rfc1002mangle(ses_init_buf->trailer.
2118 session_req.called_name,
2119 DEFAULT_CIFS_CALLED_NAME,
2120 RFC1001_NAME_LEN_WITH_NULL);
2121
2122 ses_init_buf->trailer.session_req.calling_len = 32;
2123
2124 /* calling name ends in null (byte 16) from old smb
2125 convention. */
2126 if (server->workstation_RFC1001_name &&
2127 server->workstation_RFC1001_name[0] != 0)
2128 rfc1002mangle(ses_init_buf->trailer.
2129 session_req.calling_name,
2130 server->workstation_RFC1001_name,
2131 RFC1001_NAME_LEN_WITH_NULL);
2132 else
2133 rfc1002mangle(ses_init_buf->trailer.
2134 session_req.calling_name,
2135 "LINUX_CIFS_CLNT",
2136 RFC1001_NAME_LEN_WITH_NULL);
2137
2138 ses_init_buf->trailer.session_req.scope1 = 0;
2139 ses_init_buf->trailer.session_req.scope2 = 0;
2140 smb_buf = (struct smb_hdr *)ses_init_buf;
2141 /* sizeof RFC1002_SESSION_REQUEST with no scope */
2142 smb_buf->smb_buf_length = 0x81000044;
2143 rc = smb_send(server, smb_buf, 0x44);
2144 kfree(ses_init_buf);
2145 msleep(1); /* RFC1001 layer in at least one server
2146 requires very short break before negprot
2147 presumably because not expecting negprot
2148 to follow so fast. This is a simple
2149 solution that works without
2150 complicating the code and causes no
2151 significant slowing down on mount
2152 for everyone else */
2153 }
2154 /* else the negprot may still work without this
2155 even though malloc failed */
2156
2157 }
2158
2159 return rc;
2160 }
2161
2162 static int
2163 ipv6_connect(struct TCP_Server_Info *server)
2164 {
2165 int rc = 0;
2166 int val;
2167 bool connected = false;
2168 __be16 orig_port = 0;
2169 struct socket *socket = server->ssocket;
2170
2171 if (socket == NULL) {
2172 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
2173 IPPROTO_TCP, &socket);
2174 if (rc < 0) {
2175 cERROR(1, "Error %d creating ipv6 socket", rc);
2176 socket = NULL;
2177 return rc;
2178 }
2179
2180 /* BB other socket options to set KEEPALIVE, NODELAY? */
2181 cFYI(1, "ipv6 Socket created");
2182 server->ssocket = socket;
2183 socket->sk->sk_allocation = GFP_NOFS;
2184 cifs_reclassify_socket6(socket);
2185 }
2186
2187 /* user overrode default port */
2188 if (server->addr.sockAddr6.sin6_port) {
2189 rc = socket->ops->connect(socket,
2190 (struct sockaddr *) &server->addr.sockAddr6,
2191 sizeof(struct sockaddr_in6), 0);
2192 if (rc >= 0)
2193 connected = true;
2194 }
2195
2196 if (!connected) {
2197 /* save original port so we can retry user specified port
2198 later if fall back ports fail this time */
2199
2200 orig_port = server->addr.sockAddr6.sin6_port;
2201 /* do not retry on the same port we just failed on */
2202 if (server->addr.sockAddr6.sin6_port != htons(CIFS_PORT)) {
2203 server->addr.sockAddr6.sin6_port = htons(CIFS_PORT);
2204 rc = socket->ops->connect(socket, (struct sockaddr *)
2205 &server->addr.sockAddr6,
2206 sizeof(struct sockaddr_in6), 0);
2207 if (rc >= 0)
2208 connected = true;
2209 }
2210 }
2211 if (!connected) {
2212 server->addr.sockAddr6.sin6_port = htons(RFC1001_PORT);
2213 rc = socket->ops->connect(socket, (struct sockaddr *)
2214 &server->addr.sockAddr6,
2215 sizeof(struct sockaddr_in6), 0);
2216 if (rc >= 0)
2217 connected = true;
2218 }
2219
2220 /* give up here - unless we want to retry on different
2221 protocol families some day */
2222 if (!connected) {
2223 if (orig_port)
2224 server->addr.sockAddr6.sin6_port = orig_port;
2225 cFYI(1, "Error %d connecting to server via ipv6", rc);
2226 sock_release(socket);
2227 server->ssocket = NULL;
2228 return rc;
2229 }
2230
2231 /*
2232 * Eventually check for other socket options to change from
2233 * the default. sock_setsockopt not used because it expects
2234 * user space buffer
2235 */
2236 socket->sk->sk_rcvtimeo = 7 * HZ;
2237 socket->sk->sk_sndtimeo = 5 * HZ;
2238
2239 if (server->tcp_nodelay) {
2240 val = 1;
2241 rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY,
2242 (char *)&val, sizeof(val));
2243 if (rc)
2244 cFYI(1, "set TCP_NODELAY socket option error %d", rc);
2245 }
2246
2247 server->ssocket = socket;
2248
2249 return rc;
2250 }
2251
2252 void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
2253 struct super_block *sb, struct smb_vol *vol_info)
2254 {
2255 /* if we are reconnecting then should we check to see if
2256 * any requested capabilities changed locally e.g. via
2257 * remount but we can not do much about it here
2258 * if they have (even if we could detect it by the following)
2259 * Perhaps we could add a backpointer to array of sb from tcon
2260 * or if we change to make all sb to same share the same
2261 * sb as NFS - then we only have one backpointer to sb.
2262 * What if we wanted to mount the server share twice once with
2263 * and once without posixacls or posix paths? */
2264 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
2265
2266 if (vol_info && vol_info->no_linux_ext) {
2267 tcon->fsUnixInfo.Capability = 0;
2268 tcon->unix_ext = 0; /* Unix Extensions disabled */
2269 cFYI(1, "Linux protocol extensions disabled");
2270 return;
2271 } else if (vol_info)
2272 tcon->unix_ext = 1; /* Unix Extensions supported */
2273
2274 if (tcon->unix_ext == 0) {
2275 cFYI(1, "Unix extensions disabled so not set on reconnect");
2276 return;
2277 }
2278
2279 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
2280 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
2281
2282 /* check for reconnect case in which we do not
2283 want to change the mount behavior if we can avoid it */
2284 if (vol_info == NULL) {
2285 /* turn off POSIX ACL and PATHNAMES if not set
2286 originally at mount time */
2287 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
2288 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
2289 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2290 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2291 cERROR(1, "POSIXPATH support change");
2292 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2293 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2294 cERROR(1, "possible reconnect error");
2295 cERROR(1, "server disabled POSIX path support");
2296 }
2297 }
2298
2299 cap &= CIFS_UNIX_CAP_MASK;
2300 if (vol_info && vol_info->no_psx_acl)
2301 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
2302 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
2303 cFYI(1, "negotiated posix acl support");
2304 if (sb)
2305 sb->s_flags |= MS_POSIXACL;
2306 }
2307
2308 if (vol_info && vol_info->posix_paths == 0)
2309 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2310 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
2311 cFYI(1, "negotiate posix pathnames");
2312 if (sb)
2313 CIFS_SB(sb)->mnt_cifs_flags |=
2314 CIFS_MOUNT_POSIX_PATHS;
2315 }
2316
2317 /* We might be setting the path sep back to a different
2318 form if we are reconnecting and the server switched its
2319 posix path capability for this share */
2320 if (sb && (CIFS_SB(sb)->prepathlen > 0))
2321 CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
2322
2323 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
2324 if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
2325 CIFS_SB(sb)->rsize = 127 * 1024;
2326 cFYI(DBG2, "larger reads not supported by srv");
2327 }
2328 }
2329
2330
2331 cFYI(1, "Negotiate caps 0x%x", (int)cap);
2332 #ifdef CONFIG_CIFS_DEBUG2
2333 if (cap & CIFS_UNIX_FCNTL_CAP)
2334 cFYI(1, "FCNTL cap");
2335 if (cap & CIFS_UNIX_EXTATTR_CAP)
2336 cFYI(1, "EXTATTR cap");
2337 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2338 cFYI(1, "POSIX path cap");
2339 if (cap & CIFS_UNIX_XATTR_CAP)
2340 cFYI(1, "XATTR cap");
2341 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
2342 cFYI(1, "POSIX ACL cap");
2343 if (cap & CIFS_UNIX_LARGE_READ_CAP)
2344 cFYI(1, "very large read cap");
2345 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
2346 cFYI(1, "very large write cap");
2347 #endif /* CIFS_DEBUG2 */
2348 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
2349 if (vol_info == NULL) {
2350 cFYI(1, "resetting capabilities failed");
2351 } else
2352 cERROR(1, "Negotiating Unix capabilities "
2353 "with the server failed. Consider "
2354 "mounting with the Unix Extensions\n"
2355 "disabled, if problems are found, "
2356 "by specifying the nounix mount "
2357 "option.");
2358
2359 }
2360 }
2361 }
2362
2363 static void
2364 convert_delimiter(char *path, char delim)
2365 {
2366 int i;
2367 char old_delim;
2368
2369 if (path == NULL)
2370 return;
2371
2372 if (delim == '/')
2373 old_delim = '\\';
2374 else
2375 old_delim = '/';
2376
2377 for (i = 0; path[i] != '\0'; i++) {
2378 if (path[i] == old_delim)
2379 path[i] = delim;
2380 }
2381 }
2382
2383 static void setup_cifs_sb(struct smb_vol *pvolume_info,
2384 struct cifs_sb_info *cifs_sb)
2385 {
2386 if (pvolume_info->rsize > CIFSMaxBufSize) {
2387 cERROR(1, "rsize %d too large, using MaxBufSize",
2388 pvolume_info->rsize);
2389 cifs_sb->rsize = CIFSMaxBufSize;
2390 } else if ((pvolume_info->rsize) &&
2391 (pvolume_info->rsize <= CIFSMaxBufSize))
2392 cifs_sb->rsize = pvolume_info->rsize;
2393 else /* default */
2394 cifs_sb->rsize = CIFSMaxBufSize;
2395
2396 if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
2397 cERROR(1, "wsize %d too large, using 4096 instead",
2398 pvolume_info->wsize);
2399 cifs_sb->wsize = 4096;
2400 } else if (pvolume_info->wsize)
2401 cifs_sb->wsize = pvolume_info->wsize;
2402 else
2403 cifs_sb->wsize = min_t(const int,
2404 PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2405 127*1024);
2406 /* old default of CIFSMaxBufSize was too small now
2407 that SMB Write2 can send multiple pages in kvec.
2408 RFC1001 does not describe what happens when frame
2409 bigger than 128K is sent so use that as max in
2410 conjunction with 52K kvec constraint on arch with 4K
2411 page size */
2412
2413 if (cifs_sb->rsize < 2048) {
2414 cifs_sb->rsize = 2048;
2415 /* Windows ME may prefer this */
2416 cFYI(1, "readsize set to minimum: 2048");
2417 }
2418 /* calculate prepath */
2419 cifs_sb->prepath = pvolume_info->prepath;
2420 if (cifs_sb->prepath) {
2421 cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2422 /* we can not convert the / to \ in the path
2423 separators in the prefixpath yet because we do not
2424 know (until reset_cifs_unix_caps is called later)
2425 whether POSIX PATH CAP is available. We normalize
2426 the / to \ after reset_cifs_unix_caps is called */
2427 pvolume_info->prepath = NULL;
2428 } else
2429 cifs_sb->prepathlen = 0;
2430 cifs_sb->mnt_uid = pvolume_info->linux_uid;
2431 cifs_sb->mnt_gid = pvolume_info->linux_gid;
2432 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
2433 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
2434 cFYI(1, "file mode: 0x%x dir mode: 0x%x",
2435 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode);
2436
2437 if (pvolume_info->noperm)
2438 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2439 if (pvolume_info->setuids)
2440 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2441 if (pvolume_info->server_ino)
2442 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2443 if (pvolume_info->remap)
2444 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2445 if (pvolume_info->no_xattr)
2446 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2447 if (pvolume_info->sfu_emul)
2448 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2449 if (pvolume_info->nobrl)
2450 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2451 if (pvolume_info->nostrictsync)
2452 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
2453 if (pvolume_info->mand_lock)
2454 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
2455 if (pvolume_info->cifs_acl)
2456 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2457 if (pvolume_info->override_uid)
2458 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2459 if (pvolume_info->override_gid)
2460 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2461 if (pvolume_info->dynperm)
2462 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
2463 if (pvolume_info->fsc)
2464 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE;
2465 if (pvolume_info->direct_io) {
2466 cFYI(1, "mounting share using direct i/o");
2467 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2468 }
2469
2470 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
2471 cERROR(1, "mount option dynperm ignored if cifsacl "
2472 "mount option supported");
2473 }
2474
2475 static int
2476 is_path_accessible(int xid, struct cifsTconInfo *tcon,
2477 struct cifs_sb_info *cifs_sb, const char *full_path)
2478 {
2479 int rc;
2480 FILE_ALL_INFO *pfile_info;
2481
2482 pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
2483 if (pfile_info == NULL)
2484 return -ENOMEM;
2485
2486 rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info,
2487 0 /* not legacy */, cifs_sb->local_nls,
2488 cifs_sb->mnt_cifs_flags &
2489 CIFS_MOUNT_MAP_SPECIAL_CHR);
2490 kfree(pfile_info);
2491 return rc;
2492 }
2493
2494 static void
2495 cleanup_volume_info(struct smb_vol **pvolume_info)
2496 {
2497 struct smb_vol *volume_info;
2498
2499 if (!pvolume_info || !*pvolume_info)
2500 return;
2501
2502 volume_info = *pvolume_info;
2503 kzfree(volume_info->password);
2504 kfree(volume_info->UNC);
2505 kfree(volume_info->prepath);
2506 kfree(volume_info);
2507 *pvolume_info = NULL;
2508 return;
2509 }
2510
2511 #ifdef CONFIG_CIFS_DFS_UPCALL
2512 /* build_path_to_root returns full path to root when
2513 * we do not have an exiting connection (tcon) */
2514 static char *
2515 build_unc_path_to_root(const struct smb_vol *volume_info,
2516 const struct cifs_sb_info *cifs_sb)
2517 {
2518 char *full_path;
2519
2520 int unc_len = strnlen(volume_info->UNC, MAX_TREE_SIZE + 1);
2521 full_path = kmalloc(unc_len + cifs_sb->prepathlen + 1, GFP_KERNEL);
2522 if (full_path == NULL)
2523 return ERR_PTR(-ENOMEM);
2524
2525 strncpy(full_path, volume_info->UNC, unc_len);
2526 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) {
2527 int i;
2528 for (i = 0; i < unc_len; i++) {
2529 if (full_path[i] == '\\')
2530 full_path[i] = '/';
2531 }
2532 }
2533
2534 if (cifs_sb->prepathlen)
2535 strncpy(full_path + unc_len, cifs_sb->prepath,
2536 cifs_sb->prepathlen);
2537
2538 full_path[unc_len + cifs_sb->prepathlen] = 0; /* add trailing null */
2539 return full_path;
2540 }
2541 #endif
2542
2543 int
2544 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
2545 char *mount_data_global, const char *devname)
2546 {
2547 int rc;
2548 int xid;
2549 struct smb_vol *volume_info;
2550 struct cifsSesInfo *pSesInfo;
2551 struct cifsTconInfo *tcon;
2552 struct TCP_Server_Info *srvTcp;
2553 char *full_path;
2554 char *mount_data = mount_data_global;
2555 #ifdef CONFIG_CIFS_DFS_UPCALL
2556 struct dfs_info3_param *referrals = NULL;
2557 unsigned int num_referrals = 0;
2558 int referral_walks_count = 0;
2559 try_mount_again:
2560 #endif
2561 rc = 0;
2562 tcon = NULL;
2563 pSesInfo = NULL;
2564 srvTcp = NULL;
2565 full_path = NULL;
2566
2567 xid = GetXid();
2568
2569 volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
2570 if (!volume_info) {
2571 rc = -ENOMEM;
2572 goto out;
2573 }
2574
2575 if (cifs_parse_mount_options(mount_data, devname, volume_info)) {
2576 rc = -EINVAL;
2577 goto out;
2578 }
2579
2580 if (volume_info->nullauth) {
2581 cFYI(1, "null user");
2582 volume_info->username = "";
2583 } else if (volume_info->username) {
2584 cFYI(1, "Username: %s", volume_info->username);
2585 } else {
2586 cifserror("No username specified");
2587 /* In userspace mount helper we can get user name from alternate
2588 locations such as env variables and files on disk */
2589 rc = -EINVAL;
2590 goto out;
2591 }
2592
2593 /* this is needed for ASCII cp to Unicode converts */
2594 if (volume_info->iocharset == NULL) {
2595 /* load_nls_default cannot return null */
2596 volume_info->local_nls = load_nls_default();
2597 } else {
2598 volume_info->local_nls = load_nls(volume_info->iocharset);
2599 if (volume_info->local_nls == NULL) {
2600 cERROR(1, "CIFS mount error: iocharset %s not found",
2601 volume_info->iocharset);
2602 rc = -ELIBACC;
2603 goto out;
2604 }
2605 }
2606 cifs_sb->local_nls = volume_info->local_nls;
2607
2608 /* get a reference to a tcp session */
2609 srvTcp = cifs_get_tcp_session(volume_info);
2610 if (IS_ERR(srvTcp)) {
2611 rc = PTR_ERR(srvTcp);
2612 goto out;
2613 }
2614
2615 /* get a reference to a SMB session */
2616 pSesInfo = cifs_get_smb_ses(srvTcp, volume_info);
2617 if (IS_ERR(pSesInfo)) {
2618 rc = PTR_ERR(pSesInfo);
2619 pSesInfo = NULL;
2620 goto mount_fail_check;
2621 }
2622
2623 setup_cifs_sb(volume_info, cifs_sb);
2624 if (pSesInfo->capabilities & CAP_LARGE_FILES)
2625 sb->s_maxbytes = MAX_LFS_FILESIZE;
2626 else
2627 sb->s_maxbytes = MAX_NON_LFS;
2628
2629 sb->s_time_gran = 100;
2630
2631 /* search for existing tcon to this server share */
2632 tcon = cifs_get_tcon(pSesInfo, volume_info);
2633 if (IS_ERR(tcon)) {
2634 rc = PTR_ERR(tcon);
2635 tcon = NULL;
2636 goto remote_path_check;
2637 }
2638
2639 cifs_sb->tcon = tcon;
2640
2641 /* do not care if following two calls succeed - informational */
2642 if (!tcon->ipc) {
2643 CIFSSMBQFSDeviceInfo(xid, tcon);
2644 CIFSSMBQFSAttributeInfo(xid, tcon);
2645 }
2646
2647 /* tell server which Unix caps we support */
2648 if (tcon->ses->capabilities & CAP_UNIX)
2649 /* reset of caps checks mount to see if unix extensions
2650 disabled for just this mount */
2651 reset_cifs_unix_caps(xid, tcon, sb, volume_info);
2652 else
2653 tcon->unix_ext = 0; /* server does not support them */
2654
2655 /* convert forward to back slashes in prepath here if needed */
2656 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2657 convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb));
2658
2659 if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2660 cifs_sb->rsize = 1024 * 127;
2661 cFYI(DBG2, "no very large read support, rsize now 127K");
2662 }
2663 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2664 cifs_sb->wsize = min(cifs_sb->wsize,
2665 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2666 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2667 cifs_sb->rsize = min(cifs_sb->rsize,
2668 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2669
2670 remote_path_check:
2671 /* check if a whole path (including prepath) is not remote */
2672 if (!rc && cifs_sb->prepathlen && tcon) {
2673 /* build_path_to_root works only when we have a valid tcon */
2674 full_path = cifs_build_path_to_root(cifs_sb);
2675 if (full_path == NULL) {
2676 rc = -ENOMEM;
2677 goto mount_fail_check;
2678 }
2679 rc = is_path_accessible(xid, tcon, cifs_sb, full_path);
2680 if (rc != -EREMOTE) {
2681 kfree(full_path);
2682 goto mount_fail_check;
2683 }
2684 kfree(full_path);
2685 }
2686
2687 /* get referral if needed */
2688 if (rc == -EREMOTE) {
2689 #ifdef CONFIG_CIFS_DFS_UPCALL
2690 if (referral_walks_count > MAX_NESTED_LINKS) {
2691 /*
2692 * BB: when we implement proper loop detection,
2693 * we will remove this check. But now we need it
2694 * to prevent an indefinite loop if 'DFS tree' is
2695 * misconfigured (i.e. has loops).
2696 */
2697 rc = -ELOOP;
2698 goto mount_fail_check;
2699 }
2700 /* convert forward to back slashes in prepath here if needed */
2701 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2702 convert_delimiter(cifs_sb->prepath,
2703 CIFS_DIR_SEP(cifs_sb));
2704 full_path = build_unc_path_to_root(volume_info, cifs_sb);
2705 if (IS_ERR(full_path)) {
2706 rc = PTR_ERR(full_path);
2707 goto mount_fail_check;
2708 }
2709
2710 cFYI(1, "Getting referral for: %s", full_path);
2711 rc = get_dfs_path(xid, pSesInfo , full_path + 1,
2712 cifs_sb->local_nls, &num_referrals, &referrals,
2713 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
2714 if (!rc && num_referrals > 0) {
2715 char *fake_devname = NULL;
2716
2717 if (mount_data != mount_data_global)
2718 kfree(mount_data);
2719
2720 mount_data = cifs_compose_mount_options(
2721 cifs_sb->mountdata, full_path + 1,
2722 referrals, &fake_devname);
2723
2724 free_dfs_info_array(referrals, num_referrals);
2725 kfree(fake_devname);
2726 kfree(full_path);
2727
2728 if (IS_ERR(mount_data)) {
2729 rc = PTR_ERR(mount_data);
2730 mount_data = NULL;
2731 goto mount_fail_check;
2732 }
2733
2734 if (tcon)
2735 cifs_put_tcon(tcon);
2736 else if (pSesInfo)
2737 cifs_put_smb_ses(pSesInfo);
2738
2739 cleanup_volume_info(&volume_info);
2740 referral_walks_count++;
2741 FreeXid(xid);
2742 goto try_mount_again;
2743 }
2744 #else /* No DFS support, return error on mount */
2745 rc = -EOPNOTSUPP;
2746 #endif
2747 }
2748
2749 mount_fail_check:
2750 /* on error free sesinfo and tcon struct if needed */
2751 if (rc) {
2752 if (mount_data != mount_data_global)
2753 kfree(mount_data);
2754 /* If find_unc succeeded then rc == 0 so we can not end */
2755 /* up accidently freeing someone elses tcon struct */
2756 if (tcon)
2757 cifs_put_tcon(tcon);
2758 else if (pSesInfo)
2759 cifs_put_smb_ses(pSesInfo);
2760 else
2761 cifs_put_tcp_session(srvTcp);
2762 goto out;
2763 }
2764
2765 /* volume_info->password is freed above when existing session found
2766 (in which case it is not needed anymore) but when new sesion is created
2767 the password ptr is put in the new session structure (in which case the
2768 password will be freed at unmount time) */
2769 out:
2770 /* zero out password before freeing */
2771 cleanup_volume_info(&volume_info);
2772 FreeXid(xid);
2773 return rc;
2774 }
2775
2776 int
2777 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
2778 const char *tree, struct cifsTconInfo *tcon,
2779 const struct nls_table *nls_codepage)
2780 {
2781 struct smb_hdr *smb_buffer;
2782 struct smb_hdr *smb_buffer_response;
2783 TCONX_REQ *pSMB;
2784 TCONX_RSP *pSMBr;
2785 unsigned char *bcc_ptr;
2786 int rc = 0;
2787 int length, bytes_left;
2788 __u16 count;
2789
2790 if (ses == NULL)
2791 return -EIO;
2792
2793 smb_buffer = cifs_buf_get();
2794 if (smb_buffer == NULL)
2795 return -ENOMEM;
2796
2797 smb_buffer_response = smb_buffer;
2798
2799 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
2800 NULL /*no tid */ , 4 /*wct */ );
2801
2802 smb_buffer->Mid = GetNextMid(ses->server);
2803 smb_buffer->Uid = ses->Suid;
2804 pSMB = (TCONX_REQ *) smb_buffer;
2805 pSMBr = (TCONX_RSP *) smb_buffer_response;
2806
2807 pSMB->AndXCommand = 0xFF;
2808 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
2809 bcc_ptr = &pSMB->Password[0];
2810 if ((ses->server->secMode) & SECMODE_USER) {
2811 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
2812 *bcc_ptr = 0; /* password is null byte */
2813 bcc_ptr++; /* skip password */
2814 /* already aligned so no need to do it below */
2815 } else {
2816 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
2817 #ifdef CONFIG_CIFS_WEAK_PW_HASH
2818 if ((global_secflags & CIFSSEC_MAY_LANMAN) &&
2819 (ses->server->secType == LANMAN))
2820 calc_lanman_hash(tcon->password, ses->server->cryptKey,
2821 ses->server->secMode &
2822 SECMODE_PW_ENCRYPT ? true : false,
2823 bcc_ptr);
2824 else
2825 #endif /* CIFS_WEAK_PW_HASH */
2826 SMBNTencrypt(tcon->password, ses->server->cryptKey,
2827 bcc_ptr);
2828
2829 bcc_ptr += CIFS_SESS_KEY_SIZE;
2830 if (ses->capabilities & CAP_UNICODE) {
2831 /* must align unicode strings */
2832 *bcc_ptr = 0; /* null byte password */
2833 bcc_ptr++;
2834 }
2835 }
2836
2837 if (ses->server->secMode &
2838 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2839 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2840
2841 if (ses->capabilities & CAP_STATUS32) {
2842 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2843 }
2844 if (ses->capabilities & CAP_DFS) {
2845 smb_buffer->Flags2 |= SMBFLG2_DFS;
2846 }
2847 if (ses->capabilities & CAP_UNICODE) {
2848 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2849 length =
2850 cifs_strtoUCS((__le16 *) bcc_ptr, tree,
2851 6 /* max utf8 char length in bytes */ *
2852 (/* server len*/ + 256 /* share len */), nls_codepage);
2853 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
2854 bcc_ptr += 2; /* skip trailing null */
2855 } else { /* ASCII */
2856 strcpy(bcc_ptr, tree);
2857 bcc_ptr += strlen(tree) + 1;
2858 }
2859 strcpy(bcc_ptr, "?????");
2860 bcc_ptr += strlen("?????");
2861 bcc_ptr += 1;
2862 count = bcc_ptr - &pSMB->Password[0];
2863 pSMB->hdr.smb_buf_length += count;
2864 pSMB->ByteCount = cpu_to_le16(count);
2865
2866 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
2867 CIFS_STD_OP);
2868
2869 /* above now done in SendReceive */
2870 if ((rc == 0) && (tcon != NULL)) {
2871 bool is_unicode;
2872
2873 tcon->tidStatus = CifsGood;
2874 tcon->need_reconnect = false;
2875 tcon->tid = smb_buffer_response->Tid;
2876 bcc_ptr = pByteArea(smb_buffer_response);
2877 bytes_left = BCC(smb_buffer_response);
2878 length = strnlen(bcc_ptr, bytes_left - 2);
2879 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
2880 is_unicode = true;
2881 else
2882 is_unicode = false;
2883
2884
2885 /* skip service field (NB: this field is always ASCII) */
2886 if (length == 3) {
2887 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
2888 (bcc_ptr[2] == 'C')) {
2889 cFYI(1, "IPC connection");
2890 tcon->ipc = 1;
2891 }
2892 } else if (length == 2) {
2893 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
2894 /* the most common case */
2895 cFYI(1, "disk share connection");
2896 }
2897 }
2898 bcc_ptr += length + 1;
2899 bytes_left -= (length + 1);
2900 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
2901
2902 /* mostly informational -- no need to fail on error here */
2903 kfree(tcon->nativeFileSystem);
2904 tcon->nativeFileSystem = cifs_strndup_from_ucs(bcc_ptr,
2905 bytes_left, is_unicode,
2906 nls_codepage);
2907
2908 cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem);
2909
2910 if ((smb_buffer_response->WordCount == 3) ||
2911 (smb_buffer_response->WordCount == 7))
2912 /* field is in same location */
2913 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
2914 else
2915 tcon->Flags = 0;
2916 cFYI(1, "Tcon flags: 0x%x ", tcon->Flags);
2917 } else if ((rc == 0) && tcon == NULL) {
2918 /* all we need to save for IPC$ connection */
2919 ses->ipc_tid = smb_buffer_response->Tid;
2920 }
2921
2922 cifs_buf_release(smb_buffer);
2923 return rc;
2924 }
2925
2926 int
2927 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
2928 {
2929 int rc = 0;
2930 char *tmp;
2931
2932 if (cifs_sb->tcon)
2933 cifs_put_tcon(cifs_sb->tcon);
2934
2935 cifs_sb->tcon = NULL;
2936 tmp = cifs_sb->prepath;
2937 cifs_sb->prepathlen = 0;
2938 cifs_sb->prepath = NULL;
2939 kfree(tmp);
2940
2941 return rc;
2942 }
2943
2944 int cifs_negotiate_protocol(unsigned int xid, struct cifsSesInfo *ses)
2945 {
2946 int rc = 0;
2947 struct TCP_Server_Info *server = ses->server;
2948
2949 /* only send once per connect */
2950 if (server->maxBuf != 0)
2951 return 0;
2952
2953 rc = CIFSSMBNegotiate(xid, ses);
2954 if (rc == -EAGAIN) {
2955 /* retry only once on 1st time connection */
2956 rc = CIFSSMBNegotiate(xid, ses);
2957 if (rc == -EAGAIN)
2958 rc = -EHOSTDOWN;
2959 }
2960 if (rc == 0) {
2961 spin_lock(&GlobalMid_Lock);
2962 if (server->tcpStatus != CifsExiting)
2963 server->tcpStatus = CifsGood;
2964 else
2965 rc = -EHOSTDOWN;
2966 spin_unlock(&GlobalMid_Lock);
2967
2968 }
2969
2970 return rc;
2971 }
2972
2973
2974 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *ses,
2975 struct nls_table *nls_info)
2976 {
2977 int rc = 0;
2978 struct TCP_Server_Info *server = ses->server;
2979
2980 ses->flags = 0;
2981 ses->capabilities = server->capabilities;
2982 if (linuxExtEnabled == 0)
2983 ses->capabilities &= (~CAP_UNIX);
2984
2985 cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
2986 server->secMode, server->capabilities, server->timeAdj);
2987
2988 rc = CIFS_SessSetup(xid, ses, nls_info);
2989 if (rc) {
2990 cERROR(1, "Send error in SessSetup = %d", rc);
2991 } else {
2992 cFYI(1, "CIFS Session Established successfully");
2993 spin_lock(&GlobalMid_Lock);
2994 ses->status = CifsGood;
2995 ses->need_reconnect = false;
2996 spin_unlock(&GlobalMid_Lock);
2997 }
2998
2999 return rc;
3000 }
Tomato firmware and modifications.