RxRPC: Fix a regression in the RXKAD security module
[sfrench/cifs-2.6.git] / fs / cifs / connect.c
1 /*
2  *   fs/cifs/connect.c
3  *
4  *   Copyright (C) International Business Machines  Corp., 2002,2008
5  *   Author(s): Steve French (sfrench@us.ibm.com)
6  *
7  *   This library is free software; you can redistribute it and/or modify
8  *   it under the terms of the GNU Lesser General Public License as published
9  *   by the Free Software Foundation; either version 2.1 of the License, or
10  *   (at your option) any later version.
11  *
12  *   This library is distributed in the hope that it will be useful,
13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
15  *   the GNU Lesser General Public License for more details.
16  *
17  *   You should have received a copy of the GNU Lesser General Public License
18  *   along with this library; if not, write to the Free Software
19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20  */
21 #include <linux/fs.h>
22 #include <linux/net.h>
23 #include <linux/string.h>
24 #include <linux/list.h>
25 #include <linux/wait.h>
26 #include <linux/ipv6.h>
27 #include <linux/pagemap.h>
28 #include <linux/ctype.h>
29 #include <linux/utsname.h>
30 #include <linux/mempool.h>
31 #include <linux/delay.h>
32 #include <linux/completion.h>
33 #include <linux/kthread.h>
34 #include <linux/pagevec.h>
35 #include <linux/freezer.h>
36 #include <asm/uaccess.h>
37 #include <asm/processor.h>
38 #include "cifspdu.h"
39 #include "cifsglob.h"
40 #include "cifsproto.h"
41 #include "cifs_unicode.h"
42 #include "cifs_debug.h"
43 #include "cifs_fs_sb.h"
44 #include "ntlmssp.h"
45 #include "nterr.h"
46 #include "rfc1002pdu.h"
47 #include "cn_cifs.h"
48
49 #define CIFS_PORT 445
50 #define RFC1001_PORT 139
51
52 static DECLARE_COMPLETION(cifsd_complete);
53
54 extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
55                          unsigned char *p24);
56
57 extern mempool_t *cifs_req_poolp;
58
59 struct smb_vol {
60         char *username;
61         char *password;
62         char *domainname;
63         char *UNC;
64         char *UNCip;
65         char *in6_addr;  /* ipv6 address as human readable form of in6_addr */
66         char *iocharset;  /* local code page for mapping to and from Unicode */
67         char source_rfc1001_name[16]; /* netbios name of client */
68         char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
69         uid_t linux_uid;
70         gid_t linux_gid;
71         mode_t file_mode;
72         mode_t dir_mode;
73         unsigned secFlg;
74         unsigned rw:1;
75         unsigned retry:1;
76         unsigned intr:1;
77         unsigned setuids:1;
78         unsigned override_uid:1;
79         unsigned override_gid:1;
80         unsigned noperm:1;
81         unsigned no_psx_acl:1; /* set if posix acl support should be disabled */
82         unsigned cifs_acl:1;
83         unsigned no_xattr:1;   /* set if xattr (EA) support should be disabled*/
84         unsigned server_ino:1; /* use inode numbers from server ie UniqueId */
85         unsigned direct_io:1;
86         unsigned remap:1;   /* set to remap seven reserved chars in filenames */
87         unsigned posix_paths:1;   /* unset to not ask for posix pathnames. */
88         unsigned no_linux_ext:1;
89         unsigned sfu_emul:1;
90         unsigned nullauth:1; /* attempt to authenticate with null user */
91         unsigned nocase;     /* request case insensitive filenames */
92         unsigned nobrl;      /* disable sending byte range locks to srv */
93         unsigned int rsize;
94         unsigned int wsize;
95         unsigned int sockopt;
96         unsigned short int port;
97         char *prepath;
98 };
99
100 static int ipv4_connect(struct sockaddr_in *psin_server,
101                         struct socket **csocket,
102                         char *netb_name,
103                         char *server_netb_name);
104 static int ipv6_connect(struct sockaddr_in6 *psin_server,
105                         struct socket **csocket);
106
107
108         /*
109          * cifs tcp session reconnection
110          *
111          * mark tcp session as reconnecting so temporarily locked
112          * mark all smb sessions as reconnecting for tcp session
113          * reconnect tcp session
114          * wake up waiters on reconnection? - (not needed currently)
115          */
116
117 static int
118 cifs_reconnect(struct TCP_Server_Info *server)
119 {
120         int rc = 0;
121         struct list_head *tmp;
122         struct cifsSesInfo *ses;
123         struct cifsTconInfo *tcon;
124         struct mid_q_entry *mid_entry;
125
126         spin_lock(&GlobalMid_Lock);
127         if (kthread_should_stop()) {
128                 /* the demux thread will exit normally
129                 next time through the loop */
130                 spin_unlock(&GlobalMid_Lock);
131                 return rc;
132         } else
133                 server->tcpStatus = CifsNeedReconnect;
134         spin_unlock(&GlobalMid_Lock);
135         server->maxBuf = 0;
136
137         cFYI(1, ("Reconnecting tcp session"));
138
139         /* before reconnecting the tcp session, mark the smb session (uid)
140                 and the tid bad so they are not used until reconnected */
141         read_lock(&GlobalSMBSeslock);
142         list_for_each(tmp, &GlobalSMBSessionList) {
143                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
144                 if (ses->server) {
145                         if (ses->server == server) {
146                                 ses->status = CifsNeedReconnect;
147                                 ses->ipc_tid = 0;
148                         }
149                 }
150                 /* else tcp and smb sessions need reconnection */
151         }
152         list_for_each(tmp, &GlobalTreeConnectionList) {
153                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
154                 if ((tcon) && (tcon->ses) && (tcon->ses->server == server))
155                         tcon->tidStatus = CifsNeedReconnect;
156         }
157         read_unlock(&GlobalSMBSeslock);
158         /* do not want to be sending data on a socket we are freeing */
159         down(&server->tcpSem);
160         if (server->ssocket) {
161                 cFYI(1, ("State: 0x%x Flags: 0x%lx", server->ssocket->state,
162                         server->ssocket->flags));
163                 kernel_sock_shutdown(server->ssocket, SHUT_WR);
164                 cFYI(1, ("Post shutdown state: 0x%x Flags: 0x%lx",
165                         server->ssocket->state,
166                         server->ssocket->flags));
167                 sock_release(server->ssocket);
168                 server->ssocket = NULL;
169         }
170
171         spin_lock(&GlobalMid_Lock);
172         list_for_each(tmp, &server->pending_mid_q) {
173                 mid_entry = list_entry(tmp, struct
174                                         mid_q_entry,
175                                         qhead);
176                 if (mid_entry) {
177                         if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
178                                 /* Mark other intransit requests as needing
179                                    retry so we do not immediately mark the
180                                    session bad again (ie after we reconnect
181                                    below) as they timeout too */
182                                 mid_entry->midState = MID_RETRY_NEEDED;
183                         }
184                 }
185         }
186         spin_unlock(&GlobalMid_Lock);
187         up(&server->tcpSem);
188
189         while ((!kthread_should_stop()) && (server->tcpStatus != CifsGood)) {
190                 try_to_freeze();
191                 if (server->protocolType == IPV6) {
192                         rc = ipv6_connect(&server->addr.sockAddr6,
193                                           &server->ssocket);
194                 } else {
195                         rc = ipv4_connect(&server->addr.sockAddr,
196                                         &server->ssocket,
197                                         server->workstation_RFC1001_name,
198                                         server->server_RFC1001_name);
199                 }
200                 if (rc) {
201                         cFYI(1, ("reconnect error %d", rc));
202                         msleep(3000);
203                 } else {
204                         atomic_inc(&tcpSesReconnectCount);
205                         spin_lock(&GlobalMid_Lock);
206                         if (!kthread_should_stop())
207                                 server->tcpStatus = CifsGood;
208                         server->sequence_number = 0;
209                         spin_unlock(&GlobalMid_Lock);
210         /*              atomic_set(&server->inFlight,0);*/
211                         wake_up(&server->response_q);
212                 }
213         }
214         return rc;
215 }
216
217 /*
218         return codes:
219                 0       not a transact2, or all data present
220                 >0      transact2 with that much data missing
221                 -EINVAL = invalid transact2
222
223  */
224 static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
225 {
226         struct smb_t2_rsp *pSMBt;
227         int total_data_size;
228         int data_in_this_rsp;
229         int remaining;
230
231         if (pSMB->Command != SMB_COM_TRANSACTION2)
232                 return 0;
233
234         /* check for plausible wct, bcc and t2 data and parm sizes */
235         /* check for parm and data offset going beyond end of smb */
236         if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
237                 cFYI(1, ("invalid transact2 word count"));
238                 return -EINVAL;
239         }
240
241         pSMBt = (struct smb_t2_rsp *)pSMB;
242
243         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
244         data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
245
246         remaining = total_data_size - data_in_this_rsp;
247
248         if (remaining == 0)
249                 return 0;
250         else if (remaining < 0) {
251                 cFYI(1, ("total data %d smaller than data in frame %d",
252                         total_data_size, data_in_this_rsp));
253                 return -EINVAL;
254         } else {
255                 cFYI(1, ("missing %d bytes from transact2, check next response",
256                         remaining));
257                 if (total_data_size > maxBufSize) {
258                         cERROR(1, ("TotalDataSize %d is over maximum buffer %d",
259                                 total_data_size, maxBufSize));
260                         return -EINVAL;
261                 }
262                 return remaining;
263         }
264 }
265
266 static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
267 {
268         struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
269         struct smb_t2_rsp *pSMBt  = (struct smb_t2_rsp *)pTargetSMB;
270         int total_data_size;
271         int total_in_buf;
272         int remaining;
273         int total_in_buf2;
274         char *data_area_of_target;
275         char *data_area_of_buf2;
276         __u16 byte_count;
277
278         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
279
280         if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
281                 cFYI(1, ("total data size of primary and secondary t2 differ"));
282         }
283
284         total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
285
286         remaining = total_data_size - total_in_buf;
287
288         if (remaining < 0)
289                 return -EINVAL;
290
291         if (remaining == 0) /* nothing to do, ignore */
292                 return 0;
293
294         total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
295         if (remaining < total_in_buf2) {
296                 cFYI(1, ("transact2 2nd response contains too much data"));
297         }
298
299         /* find end of first SMB data area */
300         data_area_of_target = (char *)&pSMBt->hdr.Protocol +
301                                 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
302         /* validate target area */
303
304         data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
305                                         le16_to_cpu(pSMB2->t2_rsp.DataOffset);
306
307         data_area_of_target += total_in_buf;
308
309         /* copy second buffer into end of first buffer */
310         memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2);
311         total_in_buf += total_in_buf2;
312         pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
313         byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
314         byte_count += total_in_buf2;
315         BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
316
317         byte_count = pTargetSMB->smb_buf_length;
318         byte_count += total_in_buf2;
319
320         /* BB also add check that we are not beyond maximum buffer size */
321
322         pTargetSMB->smb_buf_length = byte_count;
323
324         if (remaining == total_in_buf2) {
325                 cFYI(1, ("found the last secondary response"));
326                 return 0; /* we are done */
327         } else /* more responses to go */
328                 return 1;
329
330 }
331
332 static int
333 cifs_demultiplex_thread(struct TCP_Server_Info *server)
334 {
335         int length;
336         unsigned int pdu_length, total_read;
337         struct smb_hdr *smb_buffer = NULL;
338         struct smb_hdr *bigbuf = NULL;
339         struct smb_hdr *smallbuf = NULL;
340         struct msghdr smb_msg;
341         struct kvec iov;
342         struct socket *csocket = server->ssocket;
343         struct list_head *tmp;
344         struct cifsSesInfo *ses;
345         struct task_struct *task_to_wake = NULL;
346         struct mid_q_entry *mid_entry;
347         char temp;
348         int isLargeBuf = FALSE;
349         int isMultiRsp;
350         int reconnect;
351
352         current->flags |= PF_MEMALLOC;
353         server->tsk = current;  /* save process info to wake at shutdown */
354         cFYI(1, ("Demultiplex PID: %d", task_pid_nr(current)));
355         write_lock(&GlobalSMBSeslock);
356         atomic_inc(&tcpSesAllocCount);
357         length = tcpSesAllocCount.counter;
358         write_unlock(&GlobalSMBSeslock);
359         complete(&cifsd_complete);
360         if (length  > 1)
361                 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
362                                 GFP_KERNEL);
363
364         set_freezable();
365         while (!kthread_should_stop()) {
366                 if (try_to_freeze())
367                         continue;
368                 if (bigbuf == NULL) {
369                         bigbuf = cifs_buf_get();
370                         if (!bigbuf) {
371                                 cERROR(1, ("No memory for large SMB response"));
372                                 msleep(3000);
373                                 /* retry will check if exiting */
374                                 continue;
375                         }
376                 } else if (isLargeBuf) {
377                         /* we are reusing a dirty large buf, clear its start */
378                         memset(bigbuf, 0, sizeof(struct smb_hdr));
379                 }
380
381                 if (smallbuf == NULL) {
382                         smallbuf = cifs_small_buf_get();
383                         if (!smallbuf) {
384                                 cERROR(1, ("No memory for SMB response"));
385                                 msleep(1000);
386                                 /* retry will check if exiting */
387                                 continue;
388                         }
389                         /* beginning of smb buffer is cleared in our buf_get */
390                 } else /* if existing small buf clear beginning */
391                         memset(smallbuf, 0, sizeof(struct smb_hdr));
392
393                 isLargeBuf = FALSE;
394                 isMultiRsp = FALSE;
395                 smb_buffer = smallbuf;
396                 iov.iov_base = smb_buffer;
397                 iov.iov_len = 4;
398                 smb_msg.msg_control = NULL;
399                 smb_msg.msg_controllen = 0;
400                 pdu_length = 4; /* enough to get RFC1001 header */
401 incomplete_rcv:
402                 length =
403                     kernel_recvmsg(csocket, &smb_msg,
404                                 &iov, 1, pdu_length, 0 /* BB other flags? */);
405
406                 if (kthread_should_stop()) {
407                         break;
408                 } else if (server->tcpStatus == CifsNeedReconnect) {
409                         cFYI(1, ("Reconnect after server stopped responding"));
410                         cifs_reconnect(server);
411                         cFYI(1, ("call to reconnect done"));
412                         csocket = server->ssocket;
413                         continue;
414                 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
415                         msleep(1); /* minimum sleep to prevent looping
416                                 allowing socket to clear and app threads to set
417                                 tcpStatus CifsNeedReconnect if server hung */
418                         if (pdu_length < 4)
419                                 goto incomplete_rcv;
420                         else
421                                 continue;
422                 } else if (length <= 0) {
423                         if (server->tcpStatus == CifsNew) {
424                                 cFYI(1, ("tcp session abend after SMBnegprot"));
425                                 /* some servers kill the TCP session rather than
426                                    returning an SMB negprot error, in which
427                                    case reconnecting here is not going to help,
428                                    and so simply return error to mount */
429                                 break;
430                         }
431                         if (!try_to_freeze() && (length == -EINTR)) {
432                                 cFYI(1, ("cifsd thread killed"));
433                                 break;
434                         }
435                         cFYI(1, ("Reconnect after unexpected peek error %d",
436                                 length));
437                         cifs_reconnect(server);
438                         csocket = server->ssocket;
439                         wake_up(&server->response_q);
440                         continue;
441                 } else if (length < pdu_length) {
442                         cFYI(1, ("requested %d bytes but only got %d bytes",
443                                   pdu_length, length));
444                         pdu_length -= length;
445                         msleep(1);
446                         goto incomplete_rcv;
447                 }
448
449                 /* The right amount was read from socket - 4 bytes */
450                 /* so we can now interpret the length field */
451
452                 /* the first byte big endian of the length field,
453                 is actually not part of the length but the type
454                 with the most common, zero, as regular data */
455                 temp = *((char *) smb_buffer);
456
457                 /* Note that FC 1001 length is big endian on the wire,
458                 but we convert it here so it is always manipulated
459                 as host byte order */
460                 pdu_length = ntohl(smb_buffer->smb_buf_length);
461                 smb_buffer->smb_buf_length = pdu_length;
462
463                 cFYI(1, ("rfc1002 length 0x%x", pdu_length+4));
464
465                 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
466                         continue;
467                 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
468                         cFYI(1, ("Good RFC 1002 session rsp"));
469                         continue;
470                 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
471                         /* we get this from Windows 98 instead of
472                            an error on SMB negprot response */
473                         cFYI(1, ("Negative RFC1002 Session Response Error 0x%x)",
474                                 pdu_length));
475                         if (server->tcpStatus == CifsNew) {
476                                 /* if nack on negprot (rather than
477                                 ret of smb negprot error) reconnecting
478                                 not going to help, ret error to mount */
479                                 break;
480                         } else {
481                                 /* give server a second to
482                                 clean up before reconnect attempt */
483                                 msleep(1000);
484                                 /* always try 445 first on reconnect
485                                 since we get NACK on some if we ever
486                                 connected to port 139 (the NACK is
487                                 since we do not begin with RFC1001
488                                 session initialize frame) */
489                                 server->addr.sockAddr.sin_port =
490                                         htons(CIFS_PORT);
491                                 cifs_reconnect(server);
492                                 csocket = server->ssocket;
493                                 wake_up(&server->response_q);
494                                 continue;
495                         }
496                 } else if (temp != (char) 0) {
497                         cERROR(1, ("Unknown RFC 1002 frame"));
498                         cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
499                                       length);
500                         cifs_reconnect(server);
501                         csocket = server->ssocket;
502                         continue;
503                 }
504
505                 /* else we have an SMB response */
506                 if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
507                             (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) {
508                         cERROR(1, ("Invalid size SMB length %d pdu_length %d",
509                                         length, pdu_length+4));
510                         cifs_reconnect(server);
511                         csocket = server->ssocket;
512                         wake_up(&server->response_q);
513                         continue;
514                 }
515
516                 /* else length ok */
517                 reconnect = 0;
518
519                 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
520                         isLargeBuf = TRUE;
521                         memcpy(bigbuf, smallbuf, 4);
522                         smb_buffer = bigbuf;
523                 }
524                 length = 0;
525                 iov.iov_base = 4 + (char *)smb_buffer;
526                 iov.iov_len = pdu_length;
527                 for (total_read = 0; total_read < pdu_length;
528                      total_read += length) {
529                         length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
530                                                 pdu_length - total_read, 0);
531                         if (kthread_should_stop() ||
532                             (length == -EINTR)) {
533                                 /* then will exit */
534                                 reconnect = 2;
535                                 break;
536                         } else if (server->tcpStatus == CifsNeedReconnect) {
537                                 cifs_reconnect(server);
538                                 csocket = server->ssocket;
539                                 /* Reconnect wakes up rspns q */
540                                 /* Now we will reread sock */
541                                 reconnect = 1;
542                                 break;
543                         } else if ((length == -ERESTARTSYS) ||
544                                    (length == -EAGAIN)) {
545                                 msleep(1); /* minimum sleep to prevent looping,
546                                               allowing socket to clear and app
547                                               threads to set tcpStatus
548                                               CifsNeedReconnect if server hung*/
549                                 length = 0;
550                                 continue;
551                         } else if (length <= 0) {
552                                 cERROR(1, ("Received no data, expecting %d",
553                                               pdu_length - total_read));
554                                 cifs_reconnect(server);
555                                 csocket = server->ssocket;
556                                 reconnect = 1;
557                                 break;
558                         }
559                 }
560                 if (reconnect == 2)
561                         break;
562                 else if (reconnect == 1)
563                         continue;
564
565                 length += 4; /* account for rfc1002 hdr */
566
567
568                 dump_smb(smb_buffer, length);
569                 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
570                         cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
571                         continue;
572                 }
573
574
575                 task_to_wake = NULL;
576                 spin_lock(&GlobalMid_Lock);
577                 list_for_each(tmp, &server->pending_mid_q) {
578                         mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
579
580                         if ((mid_entry->mid == smb_buffer->Mid) &&
581                             (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
582                             (mid_entry->command == smb_buffer->Command)) {
583                                 if (check2ndT2(smb_buffer,server->maxBuf) > 0) {
584                                         /* We have a multipart transact2 resp */
585                                         isMultiRsp = TRUE;
586                                         if (mid_entry->resp_buf) {
587                                                 /* merge response - fix up 1st*/
588                                                 if (coalesce_t2(smb_buffer,
589                                                         mid_entry->resp_buf)) {
590                                                         mid_entry->multiRsp = 1;
591                                                         break;
592                                                 } else {
593                                                         /* all parts received */
594                                                         mid_entry->multiEnd = 1;
595                                                         goto multi_t2_fnd;
596                                                 }
597                                         } else {
598                                                 if (!isLargeBuf) {
599                                                         cERROR(1,("1st trans2 resp needs bigbuf"));
600                                         /* BB maybe we can fix this up,  switch
601                                            to already allocated large buffer? */
602                                                 } else {
603                                                         /* Have first buffer */
604                                                         mid_entry->resp_buf =
605                                                                  smb_buffer;
606                                                         mid_entry->largeBuf = 1;
607                                                         bigbuf = NULL;
608                                                 }
609                                         }
610                                         break;
611                                 }
612                                 mid_entry->resp_buf = smb_buffer;
613                                 if (isLargeBuf)
614                                         mid_entry->largeBuf = 1;
615                                 else
616                                         mid_entry->largeBuf = 0;
617 multi_t2_fnd:
618                                 task_to_wake = mid_entry->tsk;
619                                 mid_entry->midState = MID_RESPONSE_RECEIVED;
620 #ifdef CONFIG_CIFS_STATS2
621                                 mid_entry->when_received = jiffies;
622 #endif
623                                 /* so we do not time out requests to  server
624                                 which is still responding (since server could
625                                 be busy but not dead) */
626                                 server->lstrp = jiffies;
627                                 break;
628                         }
629                 }
630                 spin_unlock(&GlobalMid_Lock);
631                 if (task_to_wake) {
632                         /* Was previous buf put in mpx struct for multi-rsp? */
633                         if (!isMultiRsp) {
634                                 /* smb buffer will be freed by user thread */
635                                 if (isLargeBuf)
636                                         bigbuf = NULL;
637                                 else
638                                         smallbuf = NULL;
639                         }
640                         wake_up_process(task_to_wake);
641                 } else if ((is_valid_oplock_break(smb_buffer, server) == FALSE)
642                     && (isMultiRsp == FALSE)) {
643                         cERROR(1, ("No task to wake, unknown frame received! "
644                                    "NumMids %d", midCount.counter));
645                         cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
646                                       sizeof(struct smb_hdr));
647 #ifdef CONFIG_CIFS_DEBUG2
648                         cifs_dump_detail(smb_buffer);
649                         cifs_dump_mids(server);
650 #endif /* CIFS_DEBUG2 */
651
652                 }
653         } /* end while !EXITING */
654
655         spin_lock(&GlobalMid_Lock);
656         server->tcpStatus = CifsExiting;
657         server->tsk = NULL;
658         /* check if we have blocked requests that need to free */
659         /* Note that cifs_max_pending is normally 50, but
660         can be set at module install time to as little as two */
661         if (atomic_read(&server->inFlight) >= cifs_max_pending)
662                 atomic_set(&server->inFlight, cifs_max_pending - 1);
663         /* We do not want to set the max_pending too low or we
664         could end up with the counter going negative */
665         spin_unlock(&GlobalMid_Lock);
666         /* Although there should not be any requests blocked on
667         this queue it can not hurt to be paranoid and try to wake up requests
668         that may haven been blocked when more than 50 at time were on the wire
669         to the same server - they now will see the session is in exit state
670         and get out of SendReceive.  */
671         wake_up_all(&server->request_q);
672         /* give those requests time to exit */
673         msleep(125);
674
675         if (server->ssocket) {
676                 sock_release(csocket);
677                 server->ssocket = NULL;
678         }
679         /* buffer usuallly freed in free_mid - need to free it here on exit */
680         cifs_buf_release(bigbuf);
681         if (smallbuf) /* no sense logging a debug message if NULL */
682                 cifs_small_buf_release(smallbuf);
683
684         read_lock(&GlobalSMBSeslock);
685         if (list_empty(&server->pending_mid_q)) {
686                 /* loop through server session structures attached to this and
687                     mark them dead */
688                 list_for_each(tmp, &GlobalSMBSessionList) {
689                         ses =
690                             list_entry(tmp, struct cifsSesInfo,
691                                        cifsSessionList);
692                         if (ses->server == server) {
693                                 ses->status = CifsExiting;
694                                 ses->server = NULL;
695                         }
696                 }
697                 read_unlock(&GlobalSMBSeslock);
698         } else {
699                 /* although we can not zero the server struct pointer yet,
700                 since there are active requests which may depnd on them,
701                 mark the corresponding SMB sessions as exiting too */
702                 list_for_each(tmp, &GlobalSMBSessionList) {
703                         ses = list_entry(tmp, struct cifsSesInfo,
704                                          cifsSessionList);
705                         if (ses->server == server)
706                                 ses->status = CifsExiting;
707                 }
708
709                 spin_lock(&GlobalMid_Lock);
710                 list_for_each(tmp, &server->pending_mid_q) {
711                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
712                         if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
713                                 cFYI(1, ("Clearing Mid 0x%x - waking up ",
714                                          mid_entry->mid));
715                                 task_to_wake = mid_entry->tsk;
716                                 if (task_to_wake)
717                                         wake_up_process(task_to_wake);
718                         }
719                 }
720                 spin_unlock(&GlobalMid_Lock);
721                 read_unlock(&GlobalSMBSeslock);
722                 /* 1/8th of sec is more than enough time for them to exit */
723                 msleep(125);
724         }
725
726         if (!list_empty(&server->pending_mid_q)) {
727                 /* mpx threads have not exited yet give them
728                 at least the smb send timeout time for long ops */
729                 /* due to delays on oplock break requests, we need
730                 to wait at least 45 seconds before giving up
731                 on a request getting a response and going ahead
732                 and killing cifsd */
733                 cFYI(1, ("Wait for exit from demultiplex thread"));
734                 msleep(46000);
735                 /* if threads still have not exited they are probably never
736                 coming home not much else we can do but free the memory */
737         }
738
739         write_lock(&GlobalSMBSeslock);
740         atomic_dec(&tcpSesAllocCount);
741         length = tcpSesAllocCount.counter;
742
743         /* last chance to mark ses pointers invalid
744         if there are any pointing to this (e.g
745         if a crazy root user tried to kill cifsd
746         kernel thread explicitly this might happen) */
747         list_for_each(tmp, &GlobalSMBSessionList) {
748                 ses = list_entry(tmp, struct cifsSesInfo,
749                                 cifsSessionList);
750                 if (ses->server == server)
751                         ses->server = NULL;
752         }
753         write_unlock(&GlobalSMBSeslock);
754
755         kfree(server->hostname);
756         kfree(server);
757         if (length  > 0)
758                 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
759                                 GFP_KERNEL);
760
761         return 0;
762 }
763
764 /* extract the host portion of the UNC string */
765 static char *
766 extract_hostname(const char *unc)
767 {
768         const char *src;
769         char *dst, *delim;
770         unsigned int len;
771
772         /* skip double chars at beginning of string */
773         /* BB: check validity of these bytes? */
774         src = unc + 2;
775
776         /* delimiter between hostname and sharename is always '\\' now */
777         delim = strchr(src, '\\');
778         if (!delim)
779                 return ERR_PTR(-EINVAL);
780
781         len = delim - src;
782         dst = kmalloc((len + 1), GFP_KERNEL);
783         if (dst == NULL)
784                 return ERR_PTR(-ENOMEM);
785
786         memcpy(dst, src, len);
787         dst[len] = '\0';
788
789         return dst;
790 }
791
792 static int
793 cifs_parse_mount_options(char *options, const char *devname,
794                          struct smb_vol *vol)
795 {
796         char *value;
797         char *data;
798         unsigned int  temp_len, i, j;
799         char separator[2];
800
801         separator[0] = ',';
802         separator[1] = 0;
803
804         if (Local_System_Name[0] != 0)
805                 memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
806         else {
807                 char *nodename = utsname()->nodename;
808                 int n = strnlen(nodename, 15);
809                 memset(vol->source_rfc1001_name, 0x20, 15);
810                 for (i = 0; i < n; i++) {
811                         /* does not have to be perfect mapping since field is
812                         informational, only used for servers that do not support
813                         port 445 and it can be overridden at mount time */
814                         vol->source_rfc1001_name[i] = toupper(nodename[i]);
815                 }
816         }
817         vol->source_rfc1001_name[15] = 0;
818         /* null target name indicates to use *SMBSERVR default called name
819            if we end up sending RFC1001 session initialize */
820         vol->target_rfc1001_name[0] = 0;
821         vol->linux_uid = current->uid;  /* current->euid instead? */
822         vol->linux_gid = current->gid;
823         vol->dir_mode = S_IRWXUGO;
824         /* 2767 perms indicate mandatory locking support */
825         vol->file_mode = (S_IRWXUGO | S_ISGID) & (~S_IXGRP);
826
827         /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
828         vol->rw = TRUE;
829         /* default is always to request posix paths. */
830         vol->posix_paths = 1;
831
832         if (!options)
833                 return 1;
834
835         if (strncmp(options, "sep=", 4) == 0) {
836                 if (options[4] != 0) {
837                         separator[0] = options[4];
838                         options += 5;
839                 } else {
840                         cFYI(1, ("Null separator not allowed"));
841                 }
842         }
843
844         while ((data = strsep(&options, separator)) != NULL) {
845                 if (!*data)
846                         continue;
847                 if ((value = strchr(data, '=')) != NULL)
848                         *value++ = '\0';
849
850                 /* Have to parse this before we parse for "user" */
851                 if (strnicmp(data, "user_xattr", 10) == 0) {
852                         vol->no_xattr = 0;
853                 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
854                         vol->no_xattr = 1;
855                 } else if (strnicmp(data, "user", 4) == 0) {
856                         if (!value) {
857                                 printk(KERN_WARNING
858                                        "CIFS: invalid or missing username\n");
859                                 return 1;       /* needs_arg; */
860                         } else if (!*value) {
861                                 /* null user, ie anonymous, authentication */
862                                 vol->nullauth = 1;
863                         }
864                         if (strnlen(value, 200) < 200) {
865                                 vol->username = value;
866                         } else {
867                                 printk(KERN_WARNING "CIFS: username too long\n");
868                                 return 1;
869                         }
870                 } else if (strnicmp(data, "pass", 4) == 0) {
871                         if (!value) {
872                                 vol->password = NULL;
873                                 continue;
874                         } else if (value[0] == 0) {
875                                 /* check if string begins with double comma
876                                    since that would mean the password really
877                                    does start with a comma, and would not
878                                    indicate an empty string */
879                                 if (value[1] != separator[0]) {
880                                         vol->password = NULL;
881                                         continue;
882                                 }
883                         }
884                         temp_len = strlen(value);
885                         /* removed password length check, NTLM passwords
886                                 can be arbitrarily long */
887
888                         /* if comma in password, the string will be
889                         prematurely null terminated.  Commas in password are
890                         specified across the cifs mount interface by a double
891                         comma ie ,, and a comma used as in other cases ie ','
892                         as a parameter delimiter/separator is single and due
893                         to the strsep above is temporarily zeroed. */
894
895                         /* NB: password legally can have multiple commas and
896                         the only illegal character in a password is null */
897
898                         if ((value[temp_len] == 0) &&
899                             (value[temp_len+1] == separator[0])) {
900                                 /* reinsert comma */
901                                 value[temp_len] = separator[0];
902                                 temp_len += 2;  /* move after second comma */
903                                 while (value[temp_len] != 0)  {
904                                         if (value[temp_len] == separator[0]) {
905                                                 if (value[temp_len+1] ==
906                                                      separator[0]) {
907                                                 /* skip second comma */
908                                                         temp_len++;
909                                                 } else {
910                                                 /* single comma indicating start
911                                                          of next parm */
912                                                         break;
913                                                 }
914                                         }
915                                         temp_len++;
916                                 }
917                                 if (value[temp_len] == 0) {
918                                         options = NULL;
919                                 } else {
920                                         value[temp_len] = 0;
921                                         /* point option to start of next parm */
922                                         options = value + temp_len + 1;
923                                 }
924                                 /* go from value to value + temp_len condensing
925                                 double commas to singles. Note that this ends up
926                                 allocating a few bytes too many, which is ok */
927                                 vol->password = kzalloc(temp_len, GFP_KERNEL);
928                                 if (vol->password == NULL) {
929                                         printk(KERN_WARNING "CIFS: no memory "
930                                                             "for password\n");
931                                         return 1;
932                                 }
933                                 for (i = 0, j = 0; i < temp_len; i++, j++) {
934                                         vol->password[j] = value[i];
935                                         if (value[i] == separator[0]
936                                                 && value[i+1] == separator[0]) {
937                                                 /* skip second comma */
938                                                 i++;
939                                         }
940                                 }
941                                 vol->password[j] = 0;
942                         } else {
943                                 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
944                                 if (vol->password == NULL) {
945                                         printk(KERN_WARNING "CIFS: no memory "
946                                                             "for password\n");
947                                         return 1;
948                                 }
949                                 strcpy(vol->password, value);
950                         }
951                 } else if (strnicmp(data, "ip", 2) == 0) {
952                         if (!value || !*value) {
953                                 vol->UNCip = NULL;
954                         } else if (strnlen(value, 35) < 35) {
955                                 vol->UNCip = value;
956                         } else {
957                                 printk(KERN_WARNING "CIFS: ip address "
958                                                     "too long\n");
959                                 return 1;
960                         }
961                 } else if (strnicmp(data, "sec", 3) == 0) {
962                         if (!value || !*value) {
963                                 cERROR(1, ("no security value specified"));
964                                 continue;
965                         } else if (strnicmp(value, "krb5i", 5) == 0) {
966                                 vol->secFlg |= CIFSSEC_MAY_KRB5 |
967                                         CIFSSEC_MUST_SIGN;
968                         } else if (strnicmp(value, "krb5p", 5) == 0) {
969                                 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
970                                         CIFSSEC_MAY_KRB5; */
971                                 cERROR(1, ("Krb5 cifs privacy not supported"));
972                                 return 1;
973                         } else if (strnicmp(value, "krb5", 4) == 0) {
974                                 vol->secFlg |= CIFSSEC_MAY_KRB5;
975                         } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
976                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
977                                         CIFSSEC_MUST_SIGN;
978                         } else if (strnicmp(value, "ntlmv2", 6) == 0) {
979                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
980                         } else if (strnicmp(value, "ntlmi", 5) == 0) {
981                                 vol->secFlg |= CIFSSEC_MAY_NTLM |
982                                         CIFSSEC_MUST_SIGN;
983                         } else if (strnicmp(value, "ntlm", 4) == 0) {
984                                 /* ntlm is default so can be turned off too */
985                                 vol->secFlg |= CIFSSEC_MAY_NTLM;
986                         } else if (strnicmp(value, "nontlm", 6) == 0) {
987                                 /* BB is there a better way to do this? */
988                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
989 #ifdef CONFIG_CIFS_WEAK_PW_HASH
990                         } else if (strnicmp(value, "lanman", 6) == 0) {
991                                 vol->secFlg |= CIFSSEC_MAY_LANMAN;
992 #endif
993                         } else if (strnicmp(value, "none", 4) == 0) {
994                                 vol->nullauth = 1;
995                         } else {
996                                 cERROR(1, ("bad security option: %s", value));
997                                 return 1;
998                         }
999                 } else if ((strnicmp(data, "unc", 3) == 0)
1000                            || (strnicmp(data, "target", 6) == 0)
1001                            || (strnicmp(data, "path", 4) == 0)) {
1002                         if (!value || !*value) {
1003                                 printk(KERN_WARNING "CIFS: invalid path to "
1004                                                     "network resource\n");
1005                                 return 1;       /* needs_arg; */
1006                         }
1007                         if ((temp_len = strnlen(value, 300)) < 300) {
1008                                 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1009                                 if (vol->UNC == NULL)
1010                                         return 1;
1011                                 strcpy(vol->UNC, value);
1012                                 if (strncmp(vol->UNC, "//", 2) == 0) {
1013                                         vol->UNC[0] = '\\';
1014                                         vol->UNC[1] = '\\';
1015                                 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1016                                         printk(KERN_WARNING
1017                                                "CIFS: UNC Path does not begin "
1018                                                "with // or \\\\ \n");
1019                                         return 1;
1020                                 }
1021                         } else {
1022                                 printk(KERN_WARNING "CIFS: UNC name too long\n");
1023                                 return 1;
1024                         }
1025                 } else if ((strnicmp(data, "domain", 3) == 0)
1026                            || (strnicmp(data, "workgroup", 5) == 0)) {
1027                         if (!value || !*value) {
1028                                 printk(KERN_WARNING "CIFS: invalid domain name\n");
1029                                 return 1;       /* needs_arg; */
1030                         }
1031                         /* BB are there cases in which a comma can be valid in
1032                         a domain name and need special handling? */
1033                         if (strnlen(value, 256) < 256) {
1034                                 vol->domainname = value;
1035                                 cFYI(1, ("Domain name set"));
1036                         } else {
1037                                 printk(KERN_WARNING "CIFS: domain name too "
1038                                                     "long\n");
1039                                 return 1;
1040                         }
1041                 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1042                         if (!value || !*value) {
1043                                 printk(KERN_WARNING
1044                                         "CIFS: invalid path prefix\n");
1045                                 return 1;       /* needs_argument */
1046                         }
1047                         if ((temp_len = strnlen(value, 1024)) < 1024) {
1048                                 if (value[0] != '/')
1049                                         temp_len++;  /* missing leading slash */
1050                                 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1051                                 if (vol->prepath == NULL)
1052                                         return 1;
1053                                 if (value[0] != '/') {
1054                                         vol->prepath[0] = '/';
1055                                         strcpy(vol->prepath+1, value);
1056                                 } else
1057                                         strcpy(vol->prepath, value);
1058                                 cFYI(1, ("prefix path %s", vol->prepath));
1059                         } else {
1060                                 printk(KERN_WARNING "CIFS: prefix too long\n");
1061                                 return 1;
1062                         }
1063                 } else if (strnicmp(data, "iocharset", 9) == 0) {
1064                         if (!value || !*value) {
1065                                 printk(KERN_WARNING "CIFS: invalid iocharset "
1066                                                     "specified\n");
1067                                 return 1;       /* needs_arg; */
1068                         }
1069                         if (strnlen(value, 65) < 65) {
1070                                 if (strnicmp(value, "default", 7))
1071                                         vol->iocharset = value;
1072                                 /* if iocharset not set then load_nls_default
1073                                    is used by caller */
1074                                 cFYI(1, ("iocharset set to %s", value));
1075                         } else {
1076                                 printk(KERN_WARNING "CIFS: iocharset name "
1077                                                     "too long.\n");
1078                                 return 1;
1079                         }
1080                 } else if (strnicmp(data, "uid", 3) == 0) {
1081                         if (value && *value) {
1082                                 vol->linux_uid =
1083                                         simple_strtoul(value, &value, 0);
1084                                 vol->override_uid = 1;
1085                         }
1086                 } else if (strnicmp(data, "gid", 3) == 0) {
1087                         if (value && *value) {
1088                                 vol->linux_gid =
1089                                         simple_strtoul(value, &value, 0);
1090                                 vol->override_gid = 1;
1091                         }
1092                 } else if (strnicmp(data, "file_mode", 4) == 0) {
1093                         if (value && *value) {
1094                                 vol->file_mode =
1095                                         simple_strtoul(value, &value, 0);
1096                         }
1097                 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1098                         if (value && *value) {
1099                                 vol->dir_mode =
1100                                         simple_strtoul(value, &value, 0);
1101                         }
1102                 } else if (strnicmp(data, "dirmode", 4) == 0) {
1103                         if (value && *value) {
1104                                 vol->dir_mode =
1105                                         simple_strtoul(value, &value, 0);
1106                         }
1107                 } else if (strnicmp(data, "port", 4) == 0) {
1108                         if (value && *value) {
1109                                 vol->port =
1110                                         simple_strtoul(value, &value, 0);
1111                         }
1112                 } else if (strnicmp(data, "rsize", 5) == 0) {
1113                         if (value && *value) {
1114                                 vol->rsize =
1115                                         simple_strtoul(value, &value, 0);
1116                         }
1117                 } else if (strnicmp(data, "wsize", 5) == 0) {
1118                         if (value && *value) {
1119                                 vol->wsize =
1120                                         simple_strtoul(value, &value, 0);
1121                         }
1122                 } else if (strnicmp(data, "sockopt", 5) == 0) {
1123                         if (value && *value) {
1124                                 vol->sockopt =
1125                                         simple_strtoul(value, &value, 0);
1126                         }
1127                 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1128                         if (!value || !*value || (*value == ' ')) {
1129                                 cFYI(1, ("invalid (empty) netbiosname"));
1130                         } else {
1131                                 memset(vol->source_rfc1001_name, 0x20, 15);
1132                                 for (i = 0; i < 15; i++) {
1133                                 /* BB are there cases in which a comma can be
1134                                 valid in this workstation netbios name (and need
1135                                 special handling)? */
1136
1137                                 /* We do not uppercase netbiosname for user */
1138                                         if (value[i] == 0)
1139                                                 break;
1140                                         else
1141                                                 vol->source_rfc1001_name[i] =
1142                                                                 value[i];
1143                                 }
1144                                 /* The string has 16th byte zero still from
1145                                 set at top of the function  */
1146                                 if ((i == 15) && (value[i] != 0))
1147                                         printk(KERN_WARNING "CIFS: netbiosname"
1148                                                 " longer than 15 truncated.\n");
1149                         }
1150                 } else if (strnicmp(data, "servern", 7) == 0) {
1151                         /* servernetbiosname specified override *SMBSERVER */
1152                         if (!value || !*value || (*value == ' ')) {
1153                                 cFYI(1, ("empty server netbiosname specified"));
1154                         } else {
1155                                 /* last byte, type, is 0x20 for servr type */
1156                                 memset(vol->target_rfc1001_name, 0x20, 16);
1157
1158                                 for (i = 0; i < 15; i++) {
1159                                 /* BB are there cases in which a comma can be
1160                                    valid in this workstation netbios name
1161                                    (and need special handling)? */
1162
1163                                 /* user or mount helper must uppercase
1164                                    the netbiosname */
1165                                         if (value[i] == 0)
1166                                                 break;
1167                                         else
1168                                                 vol->target_rfc1001_name[i] =
1169                                                                 value[i];
1170                                 }
1171                                 /* The string has 16th byte zero still from
1172                                    set at top of the function  */
1173                                 if ((i == 15) && (value[i] != 0))
1174                                         printk(KERN_WARNING "CIFS: server net"
1175                                         "biosname longer than 15 truncated.\n");
1176                         }
1177                 } else if (strnicmp(data, "credentials", 4) == 0) {
1178                         /* ignore */
1179                 } else if (strnicmp(data, "version", 3) == 0) {
1180                         /* ignore */
1181                 } else if (strnicmp(data, "guest", 5) == 0) {
1182                         /* ignore */
1183                 } else if (strnicmp(data, "rw", 2) == 0) {
1184                         vol->rw = TRUE;
1185                 } else if ((strnicmp(data, "suid", 4) == 0) ||
1186                                    (strnicmp(data, "nosuid", 6) == 0) ||
1187                                    (strnicmp(data, "exec", 4) == 0) ||
1188                                    (strnicmp(data, "noexec", 6) == 0) ||
1189                                    (strnicmp(data, "nodev", 5) == 0) ||
1190                                    (strnicmp(data, "noauto", 6) == 0) ||
1191                                    (strnicmp(data, "dev", 3) == 0)) {
1192                         /*  The mount tool or mount.cifs helper (if present)
1193                             uses these opts to set flags, and the flags are read
1194                             by the kernel vfs layer before we get here (ie
1195                             before read super) so there is no point trying to
1196                             parse these options again and set anything and it
1197                             is ok to just ignore them */
1198                         continue;
1199                 } else if (strnicmp(data, "ro", 2) == 0) {
1200                         vol->rw = FALSE;
1201                 } else if (strnicmp(data, "hard", 4) == 0) {
1202                         vol->retry = 1;
1203                 } else if (strnicmp(data, "soft", 4) == 0) {
1204                         vol->retry = 0;
1205                 } else if (strnicmp(data, "perm", 4) == 0) {
1206                         vol->noperm = 0;
1207                 } else if (strnicmp(data, "noperm", 6) == 0) {
1208                         vol->noperm = 1;
1209                 } else if (strnicmp(data, "mapchars", 8) == 0) {
1210                         vol->remap = 1;
1211                 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1212                         vol->remap = 0;
1213                 } else if (strnicmp(data, "sfu", 3) == 0) {
1214                         vol->sfu_emul = 1;
1215                 } else if (strnicmp(data, "nosfu", 5) == 0) {
1216                         vol->sfu_emul = 0;
1217                 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1218                         vol->posix_paths = 1;
1219                 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1220                         vol->posix_paths = 0;
1221                 } else if (strnicmp(data, "nounix", 6) == 0) {
1222                         vol->no_linux_ext = 1;
1223                 } else if (strnicmp(data, "nolinux", 7) == 0) {
1224                         vol->no_linux_ext = 1;
1225                 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1226                            (strnicmp(data, "ignorecase", 10)  == 0)) {
1227                         vol->nocase = 1;
1228                 } else if (strnicmp(data, "brl", 3) == 0) {
1229                         vol->nobrl =  0;
1230                 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1231                            (strnicmp(data, "nolock", 6) == 0)) {
1232                         vol->nobrl =  1;
1233                         /* turn off mandatory locking in mode
1234                         if remote locking is turned off since the
1235                         local vfs will do advisory */
1236                         if (vol->file_mode ==
1237                                 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1238                                 vol->file_mode = S_IALLUGO;
1239                 } else if (strnicmp(data, "setuids", 7) == 0) {
1240                         vol->setuids = 1;
1241                 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1242                         vol->setuids = 0;
1243                 } else if (strnicmp(data, "nohard", 6) == 0) {
1244                         vol->retry = 0;
1245                 } else if (strnicmp(data, "nosoft", 6) == 0) {
1246                         vol->retry = 1;
1247                 } else if (strnicmp(data, "nointr", 6) == 0) {
1248                         vol->intr = 0;
1249                 } else if (strnicmp(data, "intr", 4) == 0) {
1250                         vol->intr = 1;
1251                 } else if (strnicmp(data, "serverino", 7) == 0) {
1252                         vol->server_ino = 1;
1253                 } else if (strnicmp(data, "noserverino", 9) == 0) {
1254                         vol->server_ino = 0;
1255                 } else if (strnicmp(data, "cifsacl", 7) == 0) {
1256                         vol->cifs_acl = 1;
1257                 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1258                         vol->cifs_acl = 0;
1259                 } else if (strnicmp(data, "acl", 3) == 0) {
1260                         vol->no_psx_acl = 0;
1261                 } else if (strnicmp(data, "noacl", 5) == 0) {
1262                         vol->no_psx_acl = 1;
1263                 } else if (strnicmp(data, "sign", 4) == 0) {
1264                         vol->secFlg |= CIFSSEC_MUST_SIGN;
1265 /*              } else if (strnicmp(data, "seal",4) == 0) {
1266                         vol->secFlg |= CIFSSEC_MUST_SEAL; */
1267                 } else if (strnicmp(data, "direct", 6) == 0) {
1268                         vol->direct_io = 1;
1269                 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
1270                         vol->direct_io = 1;
1271                 } else if (strnicmp(data, "in6_addr", 8) == 0) {
1272                         if (!value || !*value) {
1273                                 vol->in6_addr = NULL;
1274                         } else if (strnlen(value, 49) == 48) {
1275                                 vol->in6_addr = value;
1276                         } else {
1277                                 printk(KERN_WARNING "CIFS: ip v6 address not "
1278                                                     "48 characters long\n");
1279                                 return 1;
1280                         }
1281                 } else if (strnicmp(data, "noac", 4) == 0) {
1282                         printk(KERN_WARNING "CIFS: Mount option noac not "
1283                                 "supported. Instead set "
1284                                 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1285                 } else
1286                         printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1287                                                 data);
1288         }
1289         if (vol->UNC == NULL) {
1290                 if (devname == NULL) {
1291                         printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1292                                                 "target\n");
1293                         return 1;
1294                 }
1295                 if ((temp_len = strnlen(devname, 300)) < 300) {
1296                         vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1297                         if (vol->UNC == NULL)
1298                                 return 1;
1299                         strcpy(vol->UNC, devname);
1300                         if (strncmp(vol->UNC, "//", 2) == 0) {
1301                                 vol->UNC[0] = '\\';
1302                                 vol->UNC[1] = '\\';
1303                         } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1304                                 printk(KERN_WARNING "CIFS: UNC Path does not "
1305                                                     "begin with // or \\\\ \n");
1306                                 return 1;
1307                         }
1308                 } else {
1309                         printk(KERN_WARNING "CIFS: UNC name too long\n");
1310                         return 1;
1311                 }
1312         }
1313         if (vol->UNCip == NULL)
1314                 vol->UNCip = &vol->UNC[2];
1315
1316         return 0;
1317 }
1318
1319 static struct cifsSesInfo *
1320 cifs_find_tcp_session(struct in_addr *target_ip_addr,
1321                 struct in6_addr *target_ip6_addr,
1322                  char *userName, struct TCP_Server_Info **psrvTcp)
1323 {
1324         struct list_head *tmp;
1325         struct cifsSesInfo *ses;
1326         *psrvTcp = NULL;
1327         read_lock(&GlobalSMBSeslock);
1328
1329         list_for_each(tmp, &GlobalSMBSessionList) {
1330                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
1331                 if (ses->server) {
1332                         if ((target_ip_addr &&
1333                                 (ses->server->addr.sockAddr.sin_addr.s_addr
1334                                   == target_ip_addr->s_addr)) || (target_ip6_addr
1335                                 && memcmp(&ses->server->addr.sockAddr6.sin6_addr,
1336                                         target_ip6_addr, sizeof(*target_ip6_addr)))) {
1337                                 /* BB lock server and tcp session and increment
1338                                       use count here?? */
1339
1340                                 /* found a match on the TCP session */
1341                                 *psrvTcp = ses->server;
1342
1343                                 /* BB check if reconnection needed */
1344                                 if (strncmp
1345                                     (ses->userName, userName,
1346                                      MAX_USERNAME_SIZE) == 0){
1347                                         read_unlock(&GlobalSMBSeslock);
1348                                         /* Found exact match on both TCP and
1349                                            SMB sessions */
1350                                         return ses;
1351                                 }
1352                         }
1353                 }
1354                 /* else tcp and smb sessions need reconnection */
1355         }
1356         read_unlock(&GlobalSMBSeslock);
1357         return NULL;
1358 }
1359
1360 static struct cifsTconInfo *
1361 find_unc(__be32 new_target_ip_addr, char *uncName, char *userName)
1362 {
1363         struct list_head *tmp;
1364         struct cifsTconInfo *tcon;
1365
1366         read_lock(&GlobalSMBSeslock);
1367         list_for_each(tmp, &GlobalTreeConnectionList) {
1368                 cFYI(1, ("Next tcon"));
1369                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
1370                 if (tcon->ses) {
1371                         if (tcon->ses->server) {
1372                                 cFYI(1,
1373                                      ("old ip addr: %x == new ip %x ?",
1374                                       tcon->ses->server->addr.sockAddr.sin_addr.
1375                                       s_addr, new_target_ip_addr));
1376                                 if (tcon->ses->server->addr.sockAddr.sin_addr.
1377                                     s_addr == new_target_ip_addr) {
1378         /* BB lock tcon, server and tcp session and increment use count here? */
1379                                         /* found a match on the TCP session */
1380                                         /* BB check if reconnection needed */
1381                                         cFYI(1,
1382                                               ("IP match, old UNC: %s new: %s",
1383                                               tcon->treeName, uncName));
1384                                         if (strncmp
1385                                             (tcon->treeName, uncName,
1386                                              MAX_TREE_SIZE) == 0) {
1387                                                 cFYI(1,
1388                                                      ("and old usr: %s new: %s",
1389                                                       tcon->treeName, uncName));
1390                                                 if (strncmp
1391                                                     (tcon->ses->userName,
1392                                                      userName,
1393                                                      MAX_USERNAME_SIZE) == 0) {
1394                                                         read_unlock(&GlobalSMBSeslock);
1395                                                         /* matched smb session
1396                                                         (user name */
1397                                                         return tcon;
1398                                                 }
1399                                         }
1400                                 }
1401                         }
1402                 }
1403         }
1404         read_unlock(&GlobalSMBSeslock);
1405         return NULL;
1406 }
1407
1408 int
1409 connect_to_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1410                     const char *old_path, const struct nls_table *nls_codepage,
1411                     int remap)
1412 {
1413         struct dfs_info3_param *referrals = NULL;
1414         unsigned int num_referrals;
1415         int rc = 0;
1416
1417         rc = get_dfs_path(xid, pSesInfo, old_path, nls_codepage,
1418                         &num_referrals, &referrals, remap);
1419
1420         /* BB Add in code to: if valid refrl, if not ip address contact
1421                 the helper that resolves tcp names, mount to it, try to
1422                 tcon to it unmount it if fail */
1423
1424         kfree(referrals);
1425
1426         return rc;
1427 }
1428
1429 int
1430 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
1431              const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
1432              struct dfs_info3_param **preferrals, int remap)
1433 {
1434         char *temp_unc;
1435         int rc = 0;
1436         unsigned char *targetUNCs;
1437
1438         *pnum_referrals = 0;
1439         *preferrals = NULL;
1440
1441         if (pSesInfo->ipc_tid == 0) {
1442                 temp_unc = kmalloc(2 /* for slashes */ +
1443                         strnlen(pSesInfo->serverName,
1444                                 SERVER_NAME_LEN_WITH_NULL * 2)
1445                                  + 1 + 4 /* slash IPC$ */  + 2,
1446                                 GFP_KERNEL);
1447                 if (temp_unc == NULL)
1448                         return -ENOMEM;
1449                 temp_unc[0] = '\\';
1450                 temp_unc[1] = '\\';
1451                 strcpy(temp_unc + 2, pSesInfo->serverName);
1452                 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1453                 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1454                 cFYI(1,
1455                      ("CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid));
1456                 kfree(temp_unc);
1457         }
1458         if (rc == 0)
1459                 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, &targetUNCs,
1460                                      pnum_referrals, nls_codepage, remap);
1461         /* BB map targetUNCs to dfs_info3 structures, here or
1462                 in CIFSGetDFSRefer BB */
1463
1464         return rc;
1465 }
1466
1467 /* See RFC1001 section 14 on representation of Netbios names */
1468 static void rfc1002mangle(char *target, char *source, unsigned int length)
1469 {
1470         unsigned int i, j;
1471
1472         for (i = 0, j = 0; i < (length); i++) {
1473                 /* mask a nibble at a time and encode */
1474                 target[j] = 'A' + (0x0F & (source[i] >> 4));
1475                 target[j+1] = 'A' + (0x0F & source[i]);
1476                 j += 2;
1477         }
1478
1479 }
1480
1481
1482 static int
1483 ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
1484              char *netbios_name, char *target_name)
1485 {
1486         int rc = 0;
1487         int connected = 0;
1488         __be16 orig_port = 0;
1489
1490         if (*csocket == NULL) {
1491                 rc = sock_create_kern(PF_INET, SOCK_STREAM,
1492                                       IPPROTO_TCP, csocket);
1493                 if (rc < 0) {
1494                         cERROR(1, ("Error %d creating socket", rc));
1495                         *csocket = NULL;
1496                         return rc;
1497                 } else {
1498                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1499                         cFYI(1, ("Socket created"));
1500                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1501                 }
1502         }
1503
1504         psin_server->sin_family = AF_INET;
1505         if (psin_server->sin_port) { /* user overrode default port */
1506                 rc = (*csocket)->ops->connect(*csocket,
1507                                 (struct sockaddr *) psin_server,
1508                                 sizeof(struct sockaddr_in), 0);
1509                 if (rc >= 0)
1510                         connected = 1;
1511         }
1512
1513         if (!connected) {
1514                 /* save original port so we can retry user specified port
1515                         later if fall back ports fail this time  */
1516                 orig_port = psin_server->sin_port;
1517
1518                 /* do not retry on the same port we just failed on */
1519                 if (psin_server->sin_port != htons(CIFS_PORT)) {
1520                         psin_server->sin_port = htons(CIFS_PORT);
1521
1522                         rc = (*csocket)->ops->connect(*csocket,
1523                                         (struct sockaddr *) psin_server,
1524                                         sizeof(struct sockaddr_in), 0);
1525                         if (rc >= 0)
1526                                 connected = 1;
1527                 }
1528         }
1529         if (!connected) {
1530                 psin_server->sin_port = htons(RFC1001_PORT);
1531                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1532                                               psin_server,
1533                                               sizeof(struct sockaddr_in), 0);
1534                 if (rc >= 0)
1535                         connected = 1;
1536         }
1537
1538         /* give up here - unless we want to retry on different
1539                 protocol families some day */
1540         if (!connected) {
1541                 if (orig_port)
1542                         psin_server->sin_port = orig_port;
1543                 cFYI(1, ("Error %d connecting to server via ipv4", rc));
1544                 sock_release(*csocket);
1545                 *csocket = NULL;
1546                 return rc;
1547         }
1548         /* Eventually check for other socket options to change from
1549                 the default. sock_setsockopt not used because it expects
1550                 user space buffer */
1551          cFYI(1, ("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
1552                  (*csocket)->sk->sk_sndbuf,
1553                  (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
1554         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1555         /* make the bufsizes depend on wsize/rsize and max requests */
1556         if ((*csocket)->sk->sk_sndbuf < (200 * 1024))
1557                 (*csocket)->sk->sk_sndbuf = 200 * 1024;
1558         if ((*csocket)->sk->sk_rcvbuf < (140 * 1024))
1559                 (*csocket)->sk->sk_rcvbuf = 140 * 1024;
1560
1561         /* send RFC1001 sessinit */
1562         if (psin_server->sin_port == htons(RFC1001_PORT)) {
1563                 /* some servers require RFC1001 sessinit before sending
1564                 negprot - BB check reconnection in case where second
1565                 sessinit is sent but no second negprot */
1566                 struct rfc1002_session_packet *ses_init_buf;
1567                 struct smb_hdr *smb_buf;
1568                 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
1569                                        GFP_KERNEL);
1570                 if (ses_init_buf) {
1571                         ses_init_buf->trailer.session_req.called_len = 32;
1572                         if (target_name && (target_name[0] != 0)) {
1573                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1574                                         target_name, 16);
1575                         } else {
1576                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1577                                         DEFAULT_CIFS_CALLED_NAME, 16);
1578                         }
1579
1580                         ses_init_buf->trailer.session_req.calling_len = 32;
1581                         /* calling name ends in null (byte 16) from old smb
1582                         convention. */
1583                         if (netbios_name && (netbios_name[0] != 0)) {
1584                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1585                                         netbios_name, 16);
1586                         } else {
1587                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1588                                         "LINUX_CIFS_CLNT", 16);
1589                         }
1590                         ses_init_buf->trailer.session_req.scope1 = 0;
1591                         ses_init_buf->trailer.session_req.scope2 = 0;
1592                         smb_buf = (struct smb_hdr *)ses_init_buf;
1593                         /* sizeof RFC1002_SESSION_REQUEST with no scope */
1594                         smb_buf->smb_buf_length = 0x81000044;
1595                         rc = smb_send(*csocket, smb_buf, 0x44,
1596                                 (struct sockaddr *)psin_server);
1597                         kfree(ses_init_buf);
1598                         msleep(1); /* RFC1001 layer in at least one server
1599                                       requires very short break before negprot
1600                                       presumably because not expecting negprot
1601                                       to follow so fast.  This is a simple
1602                                       solution that works without
1603                                       complicating the code and causes no
1604                                       significant slowing down on mount
1605                                       for everyone else */
1606                 }
1607                 /* else the negprot may still work without this
1608                 even though malloc failed */
1609
1610         }
1611
1612         return rc;
1613 }
1614
1615 static int
1616 ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
1617 {
1618         int rc = 0;
1619         int connected = 0;
1620         __be16 orig_port = 0;
1621
1622         if (*csocket == NULL) {
1623                 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
1624                                       IPPROTO_TCP, csocket);
1625                 if (rc < 0) {
1626                         cERROR(1, ("Error %d creating ipv6 socket", rc));
1627                         *csocket = NULL;
1628                         return rc;
1629                 } else {
1630                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1631                          cFYI(1, ("ipv6 Socket created"));
1632                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1633                 }
1634         }
1635
1636         psin_server->sin6_family = AF_INET6;
1637
1638         if (psin_server->sin6_port) { /* user overrode default port */
1639                 rc = (*csocket)->ops->connect(*csocket,
1640                                 (struct sockaddr *) psin_server,
1641                                 sizeof(struct sockaddr_in6), 0);
1642                 if (rc >= 0)
1643                         connected = 1;
1644         }
1645
1646         if (!connected) {
1647                 /* save original port so we can retry user specified port
1648                         later if fall back ports fail this time  */
1649
1650                 orig_port = psin_server->sin6_port;
1651                 /* do not retry on the same port we just failed on */
1652                 if (psin_server->sin6_port != htons(CIFS_PORT)) {
1653                         psin_server->sin6_port = htons(CIFS_PORT);
1654
1655                         rc = (*csocket)->ops->connect(*csocket,
1656                                         (struct sockaddr *) psin_server,
1657                                         sizeof(struct sockaddr_in6), 0);
1658                         if (rc >= 0)
1659                                 connected = 1;
1660                 }
1661         }
1662         if (!connected) {
1663                 psin_server->sin6_port = htons(RFC1001_PORT);
1664                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1665                                  psin_server, sizeof(struct sockaddr_in6), 0);
1666                 if (rc >= 0)
1667                         connected = 1;
1668         }
1669
1670         /* give up here - unless we want to retry on different
1671                 protocol families some day */
1672         if (!connected) {
1673                 if (orig_port)
1674                         psin_server->sin6_port = orig_port;
1675                 cFYI(1, ("Error %d connecting to server via ipv6", rc));
1676                 sock_release(*csocket);
1677                 *csocket = NULL;
1678                 return rc;
1679         }
1680         /* Eventually check for other socket options to change from
1681                 the default. sock_setsockopt not used because it expects
1682                 user space buffer */
1683         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1684
1685         return rc;
1686 }
1687
1688 void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
1689                           struct super_block *sb, struct smb_vol *vol_info)
1690 {
1691         /* if we are reconnecting then should we check to see if
1692          * any requested capabilities changed locally e.g. via
1693          * remount but we can not do much about it here
1694          * if they have (even if we could detect it by the following)
1695          * Perhaps we could add a backpointer to array of sb from tcon
1696          * or if we change to make all sb to same share the same
1697          * sb as NFS - then we only have one backpointer to sb.
1698          * What if we wanted to mount the server share twice once with
1699          * and once without posixacls or posix paths? */
1700         __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1701
1702         if (vol_info && vol_info->no_linux_ext) {
1703                 tcon->fsUnixInfo.Capability = 0;
1704                 tcon->unix_ext = 0; /* Unix Extensions disabled */
1705                 cFYI(1, ("Linux protocol extensions disabled"));
1706                 return;
1707         } else if (vol_info)
1708                 tcon->unix_ext = 1; /* Unix Extensions supported */
1709
1710         if (tcon->unix_ext == 0) {
1711                 cFYI(1, ("Unix extensions disabled so not set on reconnect"));
1712                 return;
1713         }
1714
1715         if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
1716                 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1717
1718                 /* check for reconnect case in which we do not
1719                    want to change the mount behavior if we can avoid it */
1720                 if (vol_info == NULL) {
1721                         /* turn off POSIX ACL and PATHNAMES if not set
1722                            originally at mount time */
1723                         if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
1724                                 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1725                         if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
1726                                 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
1727                                         cERROR(1, ("POSIXPATH support change"));
1728                                 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1729                         } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
1730                                 cERROR(1, ("possible reconnect error"));
1731                                 cERROR(1,
1732                                         ("server disabled POSIX path support"));
1733                         }
1734                 }
1735
1736                 cap &= CIFS_UNIX_CAP_MASK;
1737                 if (vol_info && vol_info->no_psx_acl)
1738                         cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1739                 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
1740                         cFYI(1, ("negotiated posix acl support"));
1741                         if (sb)
1742                                 sb->s_flags |= MS_POSIXACL;
1743                 }
1744
1745                 if (vol_info && vol_info->posix_paths == 0)
1746                         cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1747                 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
1748                         cFYI(1, ("negotiate posix pathnames"));
1749                         if (sb)
1750                                 CIFS_SB(sb)->mnt_cifs_flags |=
1751                                         CIFS_MOUNT_POSIX_PATHS;
1752                 }
1753
1754                 /* We might be setting the path sep back to a different
1755                 form if we are reconnecting and the server switched its
1756                 posix path capability for this share */
1757                 if (sb && (CIFS_SB(sb)->prepathlen > 0))
1758                         CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
1759
1760                 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
1761                         if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
1762                                 CIFS_SB(sb)->rsize = 127 * 1024;
1763                                 cFYI(DBG2,
1764                                         ("larger reads not supported by srv"));
1765                         }
1766                 }
1767
1768
1769                 cFYI(1, ("Negotiate caps 0x%x", (int)cap));
1770 #ifdef CONFIG_CIFS_DEBUG2
1771                 if (cap & CIFS_UNIX_FCNTL_CAP)
1772                         cFYI(1, ("FCNTL cap"));
1773                 if (cap & CIFS_UNIX_EXTATTR_CAP)
1774                         cFYI(1, ("EXTATTR cap"));
1775                 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
1776                         cFYI(1, ("POSIX path cap"));
1777                 if (cap & CIFS_UNIX_XATTR_CAP)
1778                         cFYI(1, ("XATTR cap"));
1779                 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
1780                         cFYI(1, ("POSIX ACL cap"));
1781                 if (cap & CIFS_UNIX_LARGE_READ_CAP)
1782                         cFYI(1, ("very large read cap"));
1783                 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
1784                         cFYI(1, ("very large write cap"));
1785 #endif /* CIFS_DEBUG2 */
1786                 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
1787                         if (vol_info == NULL) {
1788                                 cFYI(1, ("resetting capabilities failed"));
1789                         } else
1790                                 cERROR(1, ("Negotiating Unix capabilities "
1791                                            "with the server failed.  Consider "
1792                                            "mounting with the Unix Extensions\n"
1793                                            "disabled, if problems are found, "
1794                                            "by specifying the nounix mount "
1795                                            "option."));
1796
1797                 }
1798         }
1799 }
1800
1801 static void
1802 convert_delimiter(char *path, char delim)
1803 {
1804         int i;
1805         char old_delim;
1806
1807         if (path == NULL)
1808                 return;
1809
1810         if (delim == '/') 
1811                 old_delim = '\\';
1812         else
1813                 old_delim = '/';
1814
1815         for (i = 0; path[i] != '\0'; i++) {
1816                 if (path[i] == old_delim)
1817                         path[i] = delim;
1818         }
1819 }
1820
1821 int
1822 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
1823            char *mount_data, const char *devname)
1824 {
1825         int rc = 0;
1826         int xid;
1827         int address_type = AF_INET;
1828         struct socket *csocket = NULL;
1829         struct sockaddr_in sin_server;
1830         struct sockaddr_in6 sin_server6;
1831         struct smb_vol volume_info;
1832         struct cifsSesInfo *pSesInfo = NULL;
1833         struct cifsSesInfo *existingCifsSes = NULL;
1834         struct cifsTconInfo *tcon = NULL;
1835         struct TCP_Server_Info *srvTcp = NULL;
1836
1837         xid = GetXid();
1838
1839 /* cFYI(1, ("Entering cifs_mount. Xid: %d with: %s", xid, mount_data)); */
1840
1841         memset(&volume_info, 0, sizeof(struct smb_vol));
1842         if (cifs_parse_mount_options(mount_data, devname, &volume_info)) {
1843                 rc = -EINVAL;
1844                 goto out;
1845         }
1846
1847         if (volume_info.nullauth) {
1848                 cFYI(1, ("null user"));
1849                 volume_info.username = "";
1850         } else if (volume_info.username) {
1851                 /* BB fixme parse for domain name here */
1852                 cFYI(1, ("Username: %s", volume_info.username));
1853         } else {
1854                 cifserror("No username specified");
1855         /* In userspace mount helper we can get user name from alternate
1856            locations such as env variables and files on disk */
1857                 rc = -EINVAL;
1858                 goto out;
1859         }
1860
1861         if (volume_info.UNCip && volume_info.UNC) {
1862                 rc = cifs_inet_pton(AF_INET, volume_info.UNCip,
1863                                     &sin_server.sin_addr.s_addr);
1864
1865                 if (rc <= 0) {
1866                         /* not ipv4 address, try ipv6 */
1867                         rc = cifs_inet_pton(AF_INET6, volume_info.UNCip,
1868                                             &sin_server6.sin6_addr.in6_u);
1869                         if (rc > 0)
1870                                 address_type = AF_INET6;
1871                 } else {
1872                         address_type = AF_INET;
1873                 }
1874
1875                 if (rc <= 0) {
1876                         /* we failed translating address */
1877                         rc = -EINVAL;
1878                         goto out;
1879                 }
1880
1881                 cFYI(1, ("UNC: %s ip: %s", volume_info.UNC, volume_info.UNCip));
1882                 /* success */
1883                 rc = 0;
1884         } else if (volume_info.UNCip) {
1885                 /* BB using ip addr as server name to connect to the
1886                    DFS root below */
1887                 cERROR(1, ("Connecting to DFS root not implemented yet"));
1888                 rc = -EINVAL;
1889                 goto out;
1890         } else /* which servers DFS root would we conect to */ {
1891                 cERROR(1,
1892                        ("CIFS mount error: No UNC path (e.g. -o "
1893                         "unc=//192.168.1.100/public) specified"));
1894                 rc = -EINVAL;
1895                 goto out;
1896         }
1897
1898         /* this is needed for ASCII cp to Unicode converts */
1899         if (volume_info.iocharset == NULL) {
1900                 cifs_sb->local_nls = load_nls_default();
1901         /* load_nls_default can not return null */
1902         } else {
1903                 cifs_sb->local_nls = load_nls(volume_info.iocharset);
1904                 if (cifs_sb->local_nls == NULL) {
1905                         cERROR(1, ("CIFS mount error: iocharset %s not found",
1906                                  volume_info.iocharset));
1907                         rc = -ELIBACC;
1908                         goto out;
1909                 }
1910         }
1911
1912         if (address_type == AF_INET)
1913                 existingCifsSes = cifs_find_tcp_session(&sin_server.sin_addr,
1914                         NULL /* no ipv6 addr */,
1915                         volume_info.username, &srvTcp);
1916         else if (address_type == AF_INET6) {
1917                 cFYI(1, ("looking for ipv6 address"));
1918                 existingCifsSes = cifs_find_tcp_session(NULL /* no ipv4 addr */,
1919                         &sin_server6.sin6_addr,
1920                         volume_info.username, &srvTcp);
1921         } else {
1922                 rc = -EINVAL;
1923                 goto out;
1924         }
1925
1926         if (srvTcp) {
1927                 cFYI(1, ("Existing tcp session with server found"));
1928         } else {        /* create socket */
1929                 if (volume_info.port)
1930                         sin_server.sin_port = htons(volume_info.port);
1931                 else
1932                         sin_server.sin_port = 0;
1933                 if (address_type == AF_INET6) {
1934                         cFYI(1, ("attempting ipv6 connect"));
1935                         /* BB should we allow ipv6 on port 139? */
1936                         /* other OS never observed in Wild doing 139 with v6 */
1937                         rc = ipv6_connect(&sin_server6, &csocket);
1938                 } else
1939                         rc = ipv4_connect(&sin_server, &csocket,
1940                                   volume_info.source_rfc1001_name,
1941                                   volume_info.target_rfc1001_name);
1942                 if (rc < 0) {
1943                         cERROR(1, ("Error connecting to IPv4 socket. "
1944                                    "Aborting operation"));
1945                         if (csocket != NULL)
1946                                 sock_release(csocket);
1947                         goto out;
1948                 }
1949
1950                 srvTcp = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1951                 if (!srvTcp) {
1952                         rc = -ENOMEM;
1953                         sock_release(csocket);
1954                         goto out;
1955                 } else {
1956                         memcpy(&srvTcp->addr.sockAddr, &sin_server,
1957                                 sizeof(struct sockaddr_in));
1958                         atomic_set(&srvTcp->inFlight, 0);
1959                         /* BB Add code for ipv6 case too */
1960                         srvTcp->ssocket = csocket;
1961                         srvTcp->protocolType = IPV4;
1962                         srvTcp->hostname = extract_hostname(volume_info.UNC);
1963                         if (IS_ERR(srvTcp->hostname)) {
1964                                 rc = PTR_ERR(srvTcp->hostname);
1965                                 sock_release(csocket);
1966                                 goto out;
1967                         }
1968                         init_waitqueue_head(&srvTcp->response_q);
1969                         init_waitqueue_head(&srvTcp->request_q);
1970                         INIT_LIST_HEAD(&srvTcp->pending_mid_q);
1971                         /* at this point we are the only ones with the pointer
1972                         to the struct since the kernel thread not created yet
1973                         so no need to spinlock this init of tcpStatus */
1974                         srvTcp->tcpStatus = CifsNew;
1975                         init_MUTEX(&srvTcp->tcpSem);
1976                         srvTcp->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, srvTcp, "cifsd");
1977                         if (IS_ERR(srvTcp->tsk)) {
1978                                 rc = PTR_ERR(srvTcp->tsk);
1979                                 cERROR(1, ("error %d create cifsd thread", rc));
1980                                 srvTcp->tsk = NULL;
1981                                 sock_release(csocket);
1982                                 kfree(srvTcp->hostname);
1983                                 goto out;
1984                         }
1985                         wait_for_completion(&cifsd_complete);
1986                         rc = 0;
1987                         memcpy(srvTcp->workstation_RFC1001_name,
1988                                 volume_info.source_rfc1001_name, 16);
1989                         memcpy(srvTcp->server_RFC1001_name,
1990                                 volume_info.target_rfc1001_name, 16);
1991                         srvTcp->sequence_number = 0;
1992                 }
1993         }
1994
1995         if (existingCifsSes) {
1996                 pSesInfo = existingCifsSes;
1997                 cFYI(1, ("Existing smb sess found (status=%d)",
1998                         pSesInfo->status));
1999                 down(&pSesInfo->sesSem);
2000                 if (pSesInfo->status == CifsNeedReconnect) {
2001                         cFYI(1, ("Session needs reconnect"));
2002                         rc = cifs_setup_session(xid, pSesInfo,
2003                                                 cifs_sb->local_nls);
2004                 }
2005                 up(&pSesInfo->sesSem);
2006         } else if (!rc) {
2007                 cFYI(1, ("Existing smb sess not found"));
2008                 pSesInfo = sesInfoAlloc();
2009                 if (pSesInfo == NULL)
2010                         rc = -ENOMEM;
2011                 else {
2012                         pSesInfo->server = srvTcp;
2013                         sprintf(pSesInfo->serverName, "%u.%u.%u.%u",
2014                                 NIPQUAD(sin_server.sin_addr.s_addr));
2015                 }
2016
2017                 if (!rc) {
2018                         /* volume_info.password freed at unmount */
2019                         if (volume_info.password) {
2020                                 pSesInfo->password = volume_info.password;
2021                                 /* set to NULL to prevent freeing on exit */
2022                                 volume_info.password = NULL;
2023                         }
2024                         if (volume_info.username)
2025                                 strncpy(pSesInfo->userName,
2026                                         volume_info.username,
2027                                         MAX_USERNAME_SIZE);
2028                         if (volume_info.domainname) {
2029                                 int len = strlen(volume_info.domainname);
2030                                 pSesInfo->domainName =
2031                                         kmalloc(len + 1, GFP_KERNEL);
2032                                 if (pSesInfo->domainName)
2033                                         strcpy(pSesInfo->domainName,
2034                                                 volume_info.domainname);
2035                         }
2036                         pSesInfo->linux_uid = volume_info.linux_uid;
2037                         pSesInfo->overrideSecFlg = volume_info.secFlg;
2038                         down(&pSesInfo->sesSem);
2039                         /* BB FIXME need to pass vol->secFlgs BB */
2040                         rc = cifs_setup_session(xid, pSesInfo,
2041                                                 cifs_sb->local_nls);
2042                         up(&pSesInfo->sesSem);
2043                         if (!rc)
2044                                 atomic_inc(&srvTcp->socketUseCount);
2045                 }
2046         }
2047
2048         /* search for existing tcon to this server share */
2049         if (!rc) {
2050                 if (volume_info.rsize > CIFSMaxBufSize) {
2051                         cERROR(1, ("rsize %d too large, using MaxBufSize",
2052                                 volume_info.rsize));
2053                         cifs_sb->rsize = CIFSMaxBufSize;
2054                 } else if ((volume_info.rsize) &&
2055                                 (volume_info.rsize <= CIFSMaxBufSize))
2056                         cifs_sb->rsize = volume_info.rsize;
2057                 else /* default */
2058                         cifs_sb->rsize = CIFSMaxBufSize;
2059
2060                 if (volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
2061                         cERROR(1, ("wsize %d too large, using 4096 instead",
2062                                   volume_info.wsize));
2063                         cifs_sb->wsize = 4096;
2064                 } else if (volume_info.wsize)
2065                         cifs_sb->wsize = volume_info.wsize;
2066                 else
2067                         cifs_sb->wsize =
2068                                 min_t(const int, PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2069                                         127*1024);
2070                         /* old default of CIFSMaxBufSize was too small now
2071                            that SMB Write2 can send multiple pages in kvec.
2072                            RFC1001 does not describe what happens when frame
2073                            bigger than 128K is sent so use that as max in
2074                            conjunction with 52K kvec constraint on arch with 4K
2075                            page size  */
2076
2077                 if (cifs_sb->rsize < 2048) {
2078                         cifs_sb->rsize = 2048;
2079                         /* Windows ME may prefer this */
2080                         cFYI(1, ("readsize set to minimum: 2048"));
2081                 }
2082                 /* calculate prepath */
2083                 cifs_sb->prepath = volume_info.prepath;
2084                 if (cifs_sb->prepath) {
2085                         cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2086                         /* we can not convert the / to \ in the path
2087                         separators in the prefixpath yet because we do not
2088                         know (until reset_cifs_unix_caps is called later)
2089                         whether POSIX PATH CAP is available. We normalize
2090                         the / to \ after reset_cifs_unix_caps is called */
2091                         volume_info.prepath = NULL;
2092                 } else
2093                         cifs_sb->prepathlen = 0;
2094                 cifs_sb->mnt_uid = volume_info.linux_uid;
2095                 cifs_sb->mnt_gid = volume_info.linux_gid;
2096                 cifs_sb->mnt_file_mode = volume_info.file_mode;
2097                 cifs_sb->mnt_dir_mode = volume_info.dir_mode;
2098                 cFYI(1, ("file mode: 0x%x  dir mode: 0x%x",
2099                         cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode));
2100
2101                 if (volume_info.noperm)
2102                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2103                 if (volume_info.setuids)
2104                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2105                 if (volume_info.server_ino)
2106                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2107                 if (volume_info.remap)
2108                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2109                 if (volume_info.no_xattr)
2110                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2111                 if (volume_info.sfu_emul)
2112                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2113                 if (volume_info.nobrl)
2114                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2115                 if (volume_info.cifs_acl)
2116                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2117                 if (volume_info.override_uid)
2118                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2119                 if (volume_info.override_gid)
2120                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2121                 if (volume_info.direct_io) {
2122                         cFYI(1, ("mounting share using direct i/o"));
2123                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2124                 }
2125
2126                 tcon =
2127                     find_unc(sin_server.sin_addr.s_addr, volume_info.UNC,
2128                              volume_info.username);
2129                 if (tcon) {
2130                         cFYI(1, ("Found match on UNC path"));
2131                         /* we can have only one retry value for a connection
2132                            to a share so for resources mounted more than once
2133                            to the same server share the last value passed in
2134                            for the retry flag is used */
2135                         tcon->retry = volume_info.retry;
2136                         tcon->nocase = volume_info.nocase;
2137                 } else {
2138                         tcon = tconInfoAlloc();
2139                         if (tcon == NULL)
2140                                 rc = -ENOMEM;
2141                         else {
2142                                 /* check for null share name ie connecting to
2143                                  * dfs root */
2144
2145                                 /* BB check if this works for exactly length
2146                                  * three strings */
2147                                 if ((strchr(volume_info.UNC + 3, '\\') == NULL)
2148                                     && (strchr(volume_info.UNC + 3, '/') ==
2149                                         NULL)) {
2150                                         rc = connect_to_dfs_path(xid, pSesInfo,
2151                                                 "", cifs_sb->local_nls,
2152                                                 cifs_sb->mnt_cifs_flags &
2153                                                   CIFS_MOUNT_MAP_SPECIAL_CHR);
2154                                         rc = -ENODEV;
2155                                         goto out;
2156                                 } else {
2157                                         /* BB Do we need to wrap sesSem around
2158                                          * this TCon call and Unix SetFS as
2159                                          * we do on SessSetup and reconnect? */
2160                                         rc = CIFSTCon(xid, pSesInfo,
2161                                                 volume_info.UNC,
2162                                                 tcon, cifs_sb->local_nls);
2163                                         cFYI(1, ("CIFS Tcon rc = %d", rc));
2164                                 }
2165                                 if (!rc) {
2166                                         atomic_inc(&pSesInfo->inUse);
2167                                         tcon->retry = volume_info.retry;
2168                                         tcon->nocase = volume_info.nocase;
2169                                 }
2170                         }
2171                 }
2172         }
2173         if (pSesInfo) {
2174                 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
2175                         sb->s_maxbytes = (u64) 1 << 63;
2176                 } else
2177                         sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
2178         }
2179
2180         /* BB FIXME fix time_gran to be larger for LANMAN sessions */
2181         sb->s_time_gran = 100;
2182
2183 /* on error free sesinfo and tcon struct if needed */
2184         if (rc) {
2185                 /* if session setup failed, use count is zero but
2186                 we still need to free cifsd thread */
2187                 if (atomic_read(&srvTcp->socketUseCount) == 0) {
2188                         spin_lock(&GlobalMid_Lock);
2189                         srvTcp->tcpStatus = CifsExiting;
2190                         spin_unlock(&GlobalMid_Lock);
2191                         if (srvTcp->tsk) {
2192                                 struct task_struct *tsk;
2193                                 /* If we could verify that kthread_stop would
2194                                    always wake up processes blocked in
2195                                    tcp in recv_mesg then we could remove the
2196                                    send_sig call */
2197                                 force_sig(SIGKILL, srvTcp->tsk);
2198                                 tsk = srvTcp->tsk;
2199                                 if (tsk)
2200                                         kthread_stop(tsk);
2201                         }
2202                 }
2203                  /* If find_unc succeeded then rc == 0 so we can not end */
2204                 if (tcon)  /* up accidently freeing someone elses tcon struct */
2205                         tconInfoFree(tcon);
2206                 if (existingCifsSes == NULL) {
2207                         if (pSesInfo) {
2208                                 if ((pSesInfo->server) &&
2209                                     (pSesInfo->status == CifsGood)) {
2210                                         int temp_rc;
2211                                         temp_rc = CIFSSMBLogoff(xid, pSesInfo);
2212                                         /* if the socketUseCount is now zero */
2213                                         if ((temp_rc == -ESHUTDOWN) &&
2214                                             (pSesInfo->server) &&
2215                                             (pSesInfo->server->tsk)) {
2216                                                 struct task_struct *tsk;
2217                                                 force_sig(SIGKILL,
2218                                                         pSesInfo->server->tsk);
2219                                                 tsk = pSesInfo->server->tsk;
2220                                                 if (tsk)
2221                                                         kthread_stop(tsk);
2222                                         }
2223                                 } else {
2224                                         cFYI(1, ("No session or bad tcon"));
2225                                         if ((pSesInfo->server) &&
2226                                             (pSesInfo->server->tsk)) {
2227                                                 struct task_struct *tsk;
2228                                                 force_sig(SIGKILL,
2229                                                         pSesInfo->server->tsk);
2230                                                 tsk = pSesInfo->server->tsk;
2231                                                 if (tsk)
2232                                                         kthread_stop(tsk);
2233                                         }
2234                                 }
2235                                 sesInfoFree(pSesInfo);
2236                                 /* pSesInfo = NULL; */
2237                         }
2238                 }
2239         } else {
2240                 atomic_inc(&tcon->useCount);
2241                 cifs_sb->tcon = tcon;
2242                 tcon->ses = pSesInfo;
2243
2244                 /* do not care if following two calls succeed - informational */
2245                 if (!tcon->ipc) {
2246                         CIFSSMBQFSDeviceInfo(xid, tcon);
2247                         CIFSSMBQFSAttributeInfo(xid, tcon);
2248                 }
2249
2250                 /* tell server which Unix caps we support */
2251                 if (tcon->ses->capabilities & CAP_UNIX)
2252                         /* reset of caps checks mount to see if unix extensions
2253                            disabled for just this mount */
2254                         reset_cifs_unix_caps(xid, tcon, sb, &volume_info);
2255                 else
2256                         tcon->unix_ext = 0; /* server does not support them */
2257
2258                 /* convert forward to back slashes in prepath here if needed */
2259                 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2260                         convert_delimiter(cifs_sb->prepath,
2261                                           CIFS_DIR_SEP(cifs_sb));
2262
2263                 if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2264                         cifs_sb->rsize = 1024 * 127;
2265                         cFYI(DBG2,
2266                                 ("no very large read support, rsize now 127K"));
2267                 }
2268                 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2269                         cifs_sb->wsize = min(cifs_sb->wsize,
2270                                              (tcon->ses->server->maxBuf -
2271                                               MAX_CIFS_HDR_SIZE));
2272                 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2273                         cifs_sb->rsize = min(cifs_sb->rsize,
2274                                              (tcon->ses->server->maxBuf -
2275                                               MAX_CIFS_HDR_SIZE));
2276         }
2277
2278         /* volume_info.password is freed above when existing session found
2279         (in which case it is not needed anymore) but when new sesion is created
2280         the password ptr is put in the new session structure (in which case the
2281         password will be freed at unmount time) */
2282 out:
2283         /* zero out password before freeing */
2284         if (volume_info.password != NULL) {
2285                 memset(volume_info.password, 0, strlen(volume_info.password));
2286                 kfree(volume_info.password);
2287         }
2288         kfree(volume_info.UNC);
2289         kfree(volume_info.prepath);
2290         FreeXid(xid);
2291         return rc;
2292 }
2293
2294 static int
2295 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2296               char session_key[CIFS_SESS_KEY_SIZE],
2297               const struct nls_table *nls_codepage)
2298 {
2299         struct smb_hdr *smb_buffer;
2300         struct smb_hdr *smb_buffer_response;
2301         SESSION_SETUP_ANDX *pSMB;
2302         SESSION_SETUP_ANDX *pSMBr;
2303         char *bcc_ptr;
2304         char *user;
2305         char *domain;
2306         int rc = 0;
2307         int remaining_words = 0;
2308         int bytes_returned = 0;
2309         int len;
2310         __u32 capabilities;
2311         __u16 count;
2312
2313         cFYI(1, ("In sesssetup"));
2314         if (ses == NULL)
2315                 return -EINVAL;
2316         user = ses->userName;
2317         domain = ses->domainName;
2318         smb_buffer = cifs_buf_get();
2319         if (smb_buffer == NULL) {
2320                 return -ENOMEM;
2321         }
2322         smb_buffer_response = smb_buffer;
2323         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2324
2325         /* send SMBsessionSetup here */
2326         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2327                         NULL /* no tCon exists yet */ , 13 /* wct */ );
2328
2329         smb_buffer->Mid = GetNextMid(ses->server);
2330         pSMB->req_no_secext.AndXCommand = 0xFF;
2331         pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2332         pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2333
2334         if (ses->server->secMode &
2335                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2336                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2337
2338         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2339                 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2340         if (ses->capabilities & CAP_UNICODE) {
2341                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2342                 capabilities |= CAP_UNICODE;
2343         }
2344         if (ses->capabilities & CAP_STATUS32) {
2345                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2346                 capabilities |= CAP_STATUS32;
2347         }
2348         if (ses->capabilities & CAP_DFS) {
2349                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2350                 capabilities |= CAP_DFS;
2351         }
2352         pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2353
2354         pSMB->req_no_secext.CaseInsensitivePasswordLength =
2355                 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2356
2357         pSMB->req_no_secext.CaseSensitivePasswordLength =
2358             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2359         bcc_ptr = pByteArea(smb_buffer);
2360         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2361         bcc_ptr += CIFS_SESS_KEY_SIZE;
2362         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2363         bcc_ptr += CIFS_SESS_KEY_SIZE;
2364
2365         if (ses->capabilities & CAP_UNICODE) {
2366                 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2367                         *bcc_ptr = 0;
2368                         bcc_ptr++;
2369                 }
2370                 if (user == NULL)
2371                         bytes_returned = 0; /* skip null user */
2372                 else
2373                         bytes_returned =
2374                                 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2375                                         nls_codepage);
2376                 /* convert number of 16 bit words to bytes */
2377                 bcc_ptr += 2 * bytes_returned;
2378                 bcc_ptr += 2;   /* trailing null */
2379                 if (domain == NULL)
2380                         bytes_returned =
2381                             cifs_strtoUCS((__le16 *) bcc_ptr,
2382                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2383                 else
2384                         bytes_returned =
2385                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2386                                           nls_codepage);
2387                 bcc_ptr += 2 * bytes_returned;
2388                 bcc_ptr += 2;
2389                 bytes_returned =
2390                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2391                                   32, nls_codepage);
2392                 bcc_ptr += 2 * bytes_returned;
2393                 bytes_returned =
2394                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release,
2395                                   32, nls_codepage);
2396                 bcc_ptr += 2 * bytes_returned;
2397                 bcc_ptr += 2;
2398                 bytes_returned =
2399                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2400                                   64, nls_codepage);
2401                 bcc_ptr += 2 * bytes_returned;
2402                 bcc_ptr += 2;
2403         } else {
2404                 if (user != NULL) {
2405                     strncpy(bcc_ptr, user, 200);
2406                     bcc_ptr += strnlen(user, 200);
2407                 }
2408                 *bcc_ptr = 0;
2409                 bcc_ptr++;
2410                 if (domain == NULL) {
2411                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2412                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2413                 } else {
2414                         strncpy(bcc_ptr, domain, 64);
2415                         bcc_ptr += strnlen(domain, 64);
2416                         *bcc_ptr = 0;
2417                         bcc_ptr++;
2418                 }
2419                 strcpy(bcc_ptr, "Linux version ");
2420                 bcc_ptr += strlen("Linux version ");
2421                 strcpy(bcc_ptr, utsname()->release);
2422                 bcc_ptr += strlen(utsname()->release) + 1;
2423                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2424                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2425         }
2426         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2427         smb_buffer->smb_buf_length += count;
2428         pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2429
2430         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2431                          &bytes_returned, CIFS_LONG_OP);
2432         if (rc) {
2433 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2434         } else if ((smb_buffer_response->WordCount == 3)
2435                    || (smb_buffer_response->WordCount == 4)) {
2436                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2437                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2438                 if (action & GUEST_LOGIN)
2439                         cFYI(1, (" Guest login")); /* BB mark SesInfo struct? */
2440                 ses->Suid = smb_buffer_response->Uid; /* UID left in wire format
2441                                                          (little endian) */
2442                 cFYI(1, ("UID = %d ", ses->Suid));
2443         /* response can have either 3 or 4 word count - Samba sends 3 */
2444                 bcc_ptr = pByteArea(smb_buffer_response);
2445                 if ((pSMBr->resp.hdr.WordCount == 3)
2446                     || ((pSMBr->resp.hdr.WordCount == 4)
2447                         && (blob_len < pSMBr->resp.ByteCount))) {
2448                         if (pSMBr->resp.hdr.WordCount == 4)
2449                                 bcc_ptr += blob_len;
2450
2451                         if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2452                                 if ((long) (bcc_ptr) % 2) {
2453                                         remaining_words =
2454                                             (BCC(smb_buffer_response) - 1) / 2;
2455                                         /* Unicode strings must be word
2456                                            aligned */
2457                                         bcc_ptr++;
2458                                 } else {
2459                                         remaining_words =
2460                                                 BCC(smb_buffer_response) / 2;
2461                                 }
2462                                 len =
2463                                     UniStrnlen((wchar_t *) bcc_ptr,
2464                                                remaining_words - 1);
2465 /* We look for obvious messed up bcc or strings in response so we do not go off
2466    the end since (at least) WIN2K and Windows XP have a major bug in not null
2467    terminating last Unicode string in response  */
2468                                 if (ses->serverOS)
2469                                         kfree(ses->serverOS);
2470                                 ses->serverOS = kzalloc(2 * (len + 1),
2471                                                         GFP_KERNEL);
2472                                 if (ses->serverOS == NULL)
2473                                         goto sesssetup_nomem;
2474                                 cifs_strfromUCS_le(ses->serverOS,
2475                                                    (__le16 *)bcc_ptr,
2476                                                    len, nls_codepage);
2477                                 bcc_ptr += 2 * (len + 1);
2478                                 remaining_words -= len + 1;
2479                                 ses->serverOS[2 * len] = 0;
2480                                 ses->serverOS[1 + (2 * len)] = 0;
2481                                 if (remaining_words > 0) {
2482                                         len = UniStrnlen((wchar_t *)bcc_ptr,
2483                                                          remaining_words-1);
2484                                         kfree(ses->serverNOS);
2485                                         ses->serverNOS = kzalloc(2 * (len + 1),
2486                                                                  GFP_KERNEL);
2487                                         if (ses->serverNOS == NULL)
2488                                                 goto sesssetup_nomem;
2489                                         cifs_strfromUCS_le(ses->serverNOS,
2490                                                            (__le16 *)bcc_ptr,
2491                                                            len, nls_codepage);
2492                                         bcc_ptr += 2 * (len + 1);
2493                                         ses->serverNOS[2 * len] = 0;
2494                                         ses->serverNOS[1 + (2 * len)] = 0;
2495                                         if (strncmp(ses->serverNOS,
2496                                                 "NT LAN Manager 4", 16) == 0) {
2497                                                 cFYI(1, ("NT4 server"));
2498                                                 ses->flags |= CIFS_SES_NT4;
2499                                         }
2500                                         remaining_words -= len + 1;
2501                                         if (remaining_words > 0) {
2502                                                 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2503                                 /* last string is not always null terminated
2504                                    (for e.g. for Windows XP & 2000) */
2505                                                 if (ses->serverDomain)
2506                                                         kfree(ses->serverDomain);
2507                                                 ses->serverDomain =
2508                                                     kzalloc(2*(len+1),
2509                                                             GFP_KERNEL);
2510                                                 if (ses->serverDomain == NULL)
2511                                                         goto sesssetup_nomem;
2512                                                 cifs_strfromUCS_le(ses->serverDomain,
2513                                                         (__le16 *)bcc_ptr,
2514                                                         len, nls_codepage);
2515                                                 bcc_ptr += 2 * (len + 1);
2516                                                 ses->serverDomain[2*len] = 0;
2517                                                 ses->serverDomain[1+(2*len)] = 0;
2518                                         } else { /* else no more room so create
2519                                                   dummy domain string */
2520                                                 if (ses->serverDomain)
2521                                                         kfree(ses->serverDomain);
2522                                                 ses->serverDomain =
2523                                                         kzalloc(2, GFP_KERNEL);
2524                                         }
2525                                 } else { /* no room so create dummy domain
2526                                             and NOS string */
2527
2528                                         /* if these kcallocs fail not much we
2529                                            can do, but better to not fail the
2530                                            sesssetup itself */
2531                                         kfree(ses->serverDomain);
2532                                         ses->serverDomain =
2533                                             kzalloc(2, GFP_KERNEL);
2534                                         kfree(ses->serverNOS);
2535                                         ses->serverNOS =
2536                                             kzalloc(2, GFP_KERNEL);
2537                                 }
2538                         } else {        /* ASCII */
2539                                 len = strnlen(bcc_ptr, 1024);
2540                                 if (((long) bcc_ptr + len) - (long)
2541                                     pByteArea(smb_buffer_response)
2542                                             <= BCC(smb_buffer_response)) {
2543                                         kfree(ses->serverOS);
2544                                         ses->serverOS = kzalloc(len + 1,
2545                                                                 GFP_KERNEL);
2546                                         if (ses->serverOS == NULL)
2547                                                 goto sesssetup_nomem;
2548                                         strncpy(ses->serverOS, bcc_ptr, len);
2549
2550                                         bcc_ptr += len;
2551                                         /* null terminate the string */
2552                                         bcc_ptr[0] = 0;
2553                                         bcc_ptr++;
2554
2555                                         len = strnlen(bcc_ptr, 1024);
2556                                         kfree(ses->serverNOS);
2557                                         ses->serverNOS = kzalloc(len + 1,
2558                                                                  GFP_KERNEL);
2559                                         if (ses->serverNOS == NULL)
2560                                                 goto sesssetup_nomem;
2561                                         strncpy(ses->serverNOS, bcc_ptr, len);
2562                                         bcc_ptr += len;
2563                                         bcc_ptr[0] = 0;
2564                                         bcc_ptr++;
2565
2566                                         len = strnlen(bcc_ptr, 1024);
2567                                         if (ses->serverDomain)
2568                                                 kfree(ses->serverDomain);
2569                                         ses->serverDomain = kzalloc(len + 1,
2570                                                                     GFP_KERNEL);
2571                                         if (ses->serverDomain == NULL)
2572                                                 goto sesssetup_nomem;
2573                                         strncpy(ses->serverDomain, bcc_ptr,
2574                                                 len);
2575                                         bcc_ptr += len;
2576                                         bcc_ptr[0] = 0;
2577                                         bcc_ptr++;
2578                                 } else
2579                                         cFYI(1,
2580                                              ("Variable field of length %d "
2581                                                 "extends beyond end of smb ",
2582                                               len));
2583                         }
2584                 } else {
2585                         cERROR(1,
2586                                (" Security Blob Length extends beyond "
2587                                 "end of SMB"));
2588                 }
2589         } else {
2590                 cERROR(1,
2591                        (" Invalid Word count %d: ",
2592                         smb_buffer_response->WordCount));
2593                 rc = -EIO;
2594         }
2595 sesssetup_nomem:        /* do not return an error on nomem for the info strings,
2596                            since that could make reconnection harder, and
2597                            reconnection might be needed to free memory */
2598         cifs_buf_release(smb_buffer);
2599
2600         return rc;
2601 }
2602
2603 static int
2604 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2605                               struct cifsSesInfo *ses, int *pNTLMv2_flag,
2606                               const struct nls_table *nls_codepage)
2607 {
2608         struct smb_hdr *smb_buffer;
2609         struct smb_hdr *smb_buffer_response;
2610         SESSION_SETUP_ANDX *pSMB;
2611         SESSION_SETUP_ANDX *pSMBr;
2612         char *bcc_ptr;
2613         char *domain;
2614         int rc = 0;
2615         int remaining_words = 0;
2616         int bytes_returned = 0;
2617         int len;
2618         int SecurityBlobLength = sizeof(NEGOTIATE_MESSAGE);
2619         PNEGOTIATE_MESSAGE SecurityBlob;
2620         PCHALLENGE_MESSAGE SecurityBlob2;
2621         __u32 negotiate_flags, capabilities;
2622         __u16 count;
2623
2624         cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
2625         if (ses == NULL)
2626                 return -EINVAL;
2627         domain = ses->domainName;
2628         *pNTLMv2_flag = FALSE;
2629         smb_buffer = cifs_buf_get();
2630         if (smb_buffer == NULL) {
2631                 return -ENOMEM;
2632         }
2633         smb_buffer_response = smb_buffer;
2634         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2635         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2636
2637         /* send SMBsessionSetup here */
2638         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2639                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2640
2641         smb_buffer->Mid = GetNextMid(ses->server);
2642         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2643         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2644
2645         pSMB->req.AndXCommand = 0xFF;
2646         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2647         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2648
2649         if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2650                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2651
2652         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2653             CAP_EXTENDED_SECURITY;
2654         if (ses->capabilities & CAP_UNICODE) {
2655                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2656                 capabilities |= CAP_UNICODE;
2657         }
2658         if (ses->capabilities & CAP_STATUS32) {
2659                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2660                 capabilities |= CAP_STATUS32;
2661         }
2662         if (ses->capabilities & CAP_DFS) {
2663                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2664                 capabilities |= CAP_DFS;
2665         }
2666         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2667
2668         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2669         SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2670         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2671         SecurityBlob->MessageType = NtLmNegotiate;
2672         negotiate_flags =
2673             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2674             NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
2675             NTLMSSP_NEGOTIATE_56 |
2676             /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2677         if (sign_CIFS_PDUs)
2678                 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2679 /*      if (ntlmv2_support)
2680                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;*/
2681         /* setup pointers to domain name and workstation name */
2682         bcc_ptr += SecurityBlobLength;
2683
2684         SecurityBlob->WorkstationName.Buffer = 0;
2685         SecurityBlob->WorkstationName.Length = 0;
2686         SecurityBlob->WorkstationName.MaximumLength = 0;
2687
2688         /* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
2689         along with username on auth request (ie the response to challenge) */
2690         SecurityBlob->DomainName.Buffer = 0;
2691         SecurityBlob->DomainName.Length = 0;
2692         SecurityBlob->DomainName.MaximumLength = 0;
2693         if (ses->capabilities & CAP_UNICODE) {
2694                 if ((long) bcc_ptr % 2) {
2695                         *bcc_ptr = 0;
2696                         bcc_ptr++;
2697                 }
2698
2699                 bytes_returned =
2700                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",