[CIFS] Missing flags2 for DFS
[sfrench/cifs-2.6.git] / fs / cifs / connect.c
1 /*
2  *   fs/cifs/connect.c
3  *
4  *   Copyright (C) International Business Machines  Corp., 2002,2006
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/pagevec.h>
34 #include <asm/uaccess.h>
35 #include <asm/processor.h>
36 #include "cifspdu.h"
37 #include "cifsglob.h"
38 #include "cifsproto.h"
39 #include "cifs_unicode.h"
40 #include "cifs_debug.h"
41 #include "cifs_fs_sb.h"
42 #include "ntlmssp.h"
43 #include "nterr.h"
44 #include "rfc1002pdu.h"
45 #include "cn_cifs.h"
46
47 #define CIFS_PORT 445
48 #define RFC1001_PORT 139
49
50 static DECLARE_COMPLETION(cifsd_complete);
51
52 extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
53                          unsigned char *p24);
54
55 extern mempool_t *cifs_req_poolp;
56
57 struct smb_vol {
58         char *username;
59         char *password;
60         char *domainname;
61         char *UNC;
62         char *UNCip;
63         char *in6_addr;  /* ipv6 address as human readable form of in6_addr */
64         char *iocharset;  /* local code page for mapping to and from Unicode */
65         char source_rfc1001_name[16]; /* netbios name of client */
66         char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
67         uid_t linux_uid;
68         gid_t linux_gid;
69         mode_t file_mode;
70         mode_t dir_mode;
71         unsigned secFlg;
72         unsigned rw:1;
73         unsigned retry:1;
74         unsigned intr:1;
75         unsigned setuids:1;
76         unsigned noperm:1;
77         unsigned no_psx_acl:1; /* set if posix acl support should be disabled */
78         unsigned cifs_acl:1;
79         unsigned no_xattr:1;   /* set if xattr (EA) support should be disabled*/
80         unsigned server_ino:1; /* use inode numbers from server ie UniqueId */
81         unsigned direct_io:1;
82         unsigned remap:1;   /* set to remap seven reserved chars in filenames */
83         unsigned posix_paths:1;   /* unset to not ask for posix pathnames. */
84         unsigned sfu_emul:1;
85         unsigned nullauth:1; /* attempt to authenticate with null user */
86         unsigned nocase;     /* request case insensitive filenames */
87         unsigned nobrl;      /* disable sending byte range locks to srv */
88         unsigned int rsize;
89         unsigned int wsize;
90         unsigned int sockopt;
91         unsigned short int port;
92         char * prepath;
93 };
94
95 static int ipv4_connect(struct sockaddr_in *psin_server, 
96                         struct socket **csocket,
97                         char * netb_name,
98                         char * server_netb_name);
99 static int ipv6_connect(struct sockaddr_in6 *psin_server, 
100                         struct socket **csocket);
101
102
103         /* 
104          * cifs tcp session reconnection
105          * 
106          * mark tcp session as reconnecting so temporarily locked
107          * mark all smb sessions as reconnecting for tcp session
108          * reconnect tcp session
109          * wake up waiters on reconnection? - (not needed currently)
110          */
111
112 static int
113 cifs_reconnect(struct TCP_Server_Info *server)
114 {
115         int rc = 0;
116         struct list_head *tmp;
117         struct cifsSesInfo *ses;
118         struct cifsTconInfo *tcon;
119         struct mid_q_entry * mid_entry;
120         
121         spin_lock(&GlobalMid_Lock);
122         if(server->tcpStatus == CifsExiting) {
123                 /* the demux thread will exit normally 
124                 next time through the loop */
125                 spin_unlock(&GlobalMid_Lock);
126                 return rc;
127         } else
128                 server->tcpStatus = CifsNeedReconnect;
129         spin_unlock(&GlobalMid_Lock);
130         server->maxBuf = 0;
131
132         cFYI(1, ("Reconnecting tcp session"));
133
134         /* before reconnecting the tcp session, mark the smb session (uid)
135                 and the tid bad so they are not used until reconnected */
136         read_lock(&GlobalSMBSeslock);
137         list_for_each(tmp, &GlobalSMBSessionList) {
138                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
139                 if (ses->server) {
140                         if (ses->server == server) {
141                                 ses->status = CifsNeedReconnect;
142                                 ses->ipc_tid = 0;
143                         }
144                 }
145                 /* else tcp and smb sessions need reconnection */
146         }
147         list_for_each(tmp, &GlobalTreeConnectionList) {
148                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
149                 if((tcon) && (tcon->ses) && (tcon->ses->server == server)) {
150                         tcon->tidStatus = CifsNeedReconnect;
151                 }
152         }
153         read_unlock(&GlobalSMBSeslock);
154         /* do not want to be sending data on a socket we are freeing */
155         down(&server->tcpSem); 
156         if(server->ssocket) {
157                 cFYI(1,("State: 0x%x Flags: 0x%lx", server->ssocket->state,
158                         server->ssocket->flags));
159                 server->ssocket->ops->shutdown(server->ssocket,SEND_SHUTDOWN);
160                 cFYI(1,("Post shutdown state: 0x%x Flags: 0x%lx", server->ssocket->state,
161                         server->ssocket->flags));
162                 sock_release(server->ssocket);
163                 server->ssocket = NULL;
164         }
165
166         spin_lock(&GlobalMid_Lock);
167         list_for_each(tmp, &server->pending_mid_q) {
168                 mid_entry = list_entry(tmp, struct
169                                         mid_q_entry,
170                                         qhead);
171                 if(mid_entry) {
172                         if(mid_entry->midState == MID_REQUEST_SUBMITTED) {
173                                 /* Mark other intransit requests as needing
174                                    retry so we do not immediately mark the
175                                    session bad again (ie after we reconnect
176                                    below) as they timeout too */
177                                 mid_entry->midState = MID_RETRY_NEEDED;
178                         }
179                 }
180         }
181         spin_unlock(&GlobalMid_Lock);
182         up(&server->tcpSem); 
183
184         while ((server->tcpStatus != CifsExiting) && (server->tcpStatus != CifsGood))
185         {
186                 try_to_freeze();
187                 if(server->protocolType == IPV6) {
188                         rc = ipv6_connect(&server->addr.sockAddr6,&server->ssocket);
189                 } else {
190                         rc = ipv4_connect(&server->addr.sockAddr, 
191                                         &server->ssocket,
192                                         server->workstation_RFC1001_name,
193                                         server->server_RFC1001_name);
194                 }
195                 if(rc) {
196                         cFYI(1,("reconnect error %d",rc));
197                         msleep(3000);
198                 } else {
199                         atomic_inc(&tcpSesReconnectCount);
200                         spin_lock(&GlobalMid_Lock);
201                         if(server->tcpStatus != CifsExiting)
202                                 server->tcpStatus = CifsGood;
203                         server->sequence_number = 0;
204                         spin_unlock(&GlobalMid_Lock);                   
205         /*              atomic_set(&server->inFlight,0);*/
206                         wake_up(&server->response_q);
207                 }
208         }
209         return rc;
210 }
211
212 /* 
213         return codes:
214                 0       not a transact2, or all data present
215                 >0      transact2 with that much data missing
216                 -EINVAL = invalid transact2
217
218  */
219 static int check2ndT2(struct smb_hdr * pSMB, unsigned int maxBufSize)
220 {
221         struct smb_t2_rsp * pSMBt;
222         int total_data_size;
223         int data_in_this_rsp;
224         int remaining;
225
226         if(pSMB->Command != SMB_COM_TRANSACTION2)
227                 return 0;
228
229         /* check for plausible wct, bcc and t2 data and parm sizes */
230         /* check for parm and data offset going beyond end of smb */
231         if(pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
232                 cFYI(1,("invalid transact2 word count"));
233                 return -EINVAL;
234         }
235
236         pSMBt = (struct smb_t2_rsp *)pSMB;
237
238         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
239         data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
240
241         remaining = total_data_size - data_in_this_rsp;
242
243         if(remaining == 0)
244                 return 0;
245         else if(remaining < 0) {
246                 cFYI(1,("total data %d smaller than data in frame %d",
247                         total_data_size, data_in_this_rsp));
248                 return -EINVAL;
249         } else {
250                 cFYI(1,("missing %d bytes from transact2, check next response",
251                         remaining));
252                 if(total_data_size > maxBufSize) {
253                         cERROR(1,("TotalDataSize %d is over maximum buffer %d",
254                                 total_data_size,maxBufSize));
255                         return -EINVAL; 
256                 }
257                 return remaining;
258         }
259 }
260
261 static int coalesce_t2(struct smb_hdr * psecond, struct smb_hdr *pTargetSMB)
262 {
263         struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
264         struct smb_t2_rsp *pSMBt  = (struct smb_t2_rsp *)pTargetSMB;
265         int total_data_size;
266         int total_in_buf;
267         int remaining;
268         int total_in_buf2;
269         char * data_area_of_target;
270         char * data_area_of_buf2;
271         __u16 byte_count;
272
273         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
274
275         if(total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
276                 cFYI(1,("total data sizes of primary and secondary t2 differ"));
277         }
278
279         total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
280
281         remaining = total_data_size - total_in_buf;
282         
283         if(remaining < 0)
284                 return -EINVAL;
285
286         if(remaining == 0) /* nothing to do, ignore */
287                 return 0;
288         
289         total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
290         if(remaining < total_in_buf2) {
291                 cFYI(1,("transact2 2nd response contains too much data"));
292         }
293
294         /* find end of first SMB data area */
295         data_area_of_target = (char *)&pSMBt->hdr.Protocol + 
296                                 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
297         /* validate target area */
298
299         data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
300                                         le16_to_cpu(pSMB2->t2_rsp.DataOffset);
301
302         data_area_of_target += total_in_buf;
303
304         /* copy second buffer into end of first buffer */
305         memcpy(data_area_of_target,data_area_of_buf2,total_in_buf2);
306         total_in_buf += total_in_buf2;
307         pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
308         byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
309         byte_count += total_in_buf2;
310         BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
311
312         byte_count = pTargetSMB->smb_buf_length;
313         byte_count += total_in_buf2;
314
315         /* BB also add check that we are not beyond maximum buffer size */
316                 
317         pTargetSMB->smb_buf_length = byte_count;
318
319         if(remaining == total_in_buf2) {
320                 cFYI(1,("found the last secondary response"));
321                 return 0; /* we are done */
322         } else /* more responses to go */
323                 return 1;
324
325 }
326
327 static int
328 cifs_demultiplex_thread(struct TCP_Server_Info *server)
329 {
330         int length;
331         unsigned int pdu_length, total_read;
332         struct smb_hdr *smb_buffer = NULL;
333         struct smb_hdr *bigbuf = NULL;
334         struct smb_hdr *smallbuf = NULL;
335         struct msghdr smb_msg;
336         struct kvec iov;
337         struct socket *csocket = server->ssocket;
338         struct list_head *tmp;
339         struct cifsSesInfo *ses;
340         struct task_struct *task_to_wake = NULL;
341         struct mid_q_entry *mid_entry;
342         char temp;
343         int isLargeBuf = FALSE;
344         int isMultiRsp;
345         int reconnect;
346
347         daemonize("cifsd");
348         allow_signal(SIGKILL);
349         current->flags |= PF_MEMALLOC;
350         server->tsk = current;  /* save process info to wake at shutdown */
351         cFYI(1, ("Demultiplex PID: %d", current->pid));
352         write_lock(&GlobalSMBSeslock); 
353         atomic_inc(&tcpSesAllocCount);
354         length = tcpSesAllocCount.counter;
355         write_unlock(&GlobalSMBSeslock);
356         complete(&cifsd_complete);
357         if(length  > 1) {
358                 mempool_resize(cifs_req_poolp,
359                         length + cifs_min_rcv,
360                         GFP_KERNEL);
361         }
362
363         while (server->tcpStatus != CifsExiting) {
364                 if (try_to_freeze())
365                         continue;
366                 if (bigbuf == NULL) {
367                         bigbuf = cifs_buf_get();
368                         if (!bigbuf) {
369                                 cERROR(1, ("No memory for large SMB response"));
370                                 msleep(3000);
371                                 /* retry will check if exiting */
372                                 continue;
373                         }
374                 } else if (isLargeBuf) {
375                         /* we are reusing a dirty large buf, clear its start */
376                         memset(bigbuf, 0, sizeof (struct smb_hdr));
377                 }
378
379                 if (smallbuf == NULL) {
380                         smallbuf = cifs_small_buf_get();
381                         if (!smallbuf) {
382                                 cERROR(1, ("No memory for SMB response"));
383                                 msleep(1000);
384                                 /* retry will check if exiting */
385                                 continue;
386                         }
387                         /* beginning of smb buffer is cleared in our buf_get */
388                 } else /* if existing small buf clear beginning */
389                         memset(smallbuf, 0, sizeof (struct smb_hdr));
390
391                 isLargeBuf = FALSE;
392                 isMultiRsp = FALSE;
393                 smb_buffer = smallbuf;
394                 iov.iov_base = smb_buffer;
395                 iov.iov_len = 4;
396                 smb_msg.msg_control = NULL;
397                 smb_msg.msg_controllen = 0;
398                 length =
399                     kernel_recvmsg(csocket, &smb_msg,
400                                  &iov, 1, 4, 0 /* BB see socket.h flags */);
401
402                 if (server->tcpStatus == CifsExiting) {
403                         break;
404                 } else if (server->tcpStatus == CifsNeedReconnect) {
405                         cFYI(1, ("Reconnect after server stopped responding"));
406                         cifs_reconnect(server);
407                         cFYI(1, ("call to reconnect done"));
408                         csocket = server->ssocket;
409                         continue;
410                 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
411                         msleep(1); /* minimum sleep to prevent looping
412                                 allowing socket to clear and app threads to set
413                                 tcpStatus CifsNeedReconnect if server hung */
414                         continue;
415                 } else if (length <= 0) {
416                         if (server->tcpStatus == CifsNew) {
417                                 cFYI(1, ("tcp session abend after SMBnegprot"));
418                                 /* some servers kill the TCP session rather than
419                                    returning an SMB negprot error, in which
420                                    case reconnecting here is not going to help,
421                                    and so simply return error to mount */
422                                 break;
423                         }
424                         if (!try_to_freeze() && (length == -EINTR)) {
425                                 cFYI(1,("cifsd thread killed"));
426                                 break;
427                         }
428                         cFYI(1,("Reconnect after unexpected peek error %d",
429                                 length));
430                         cifs_reconnect(server);
431                         csocket = server->ssocket;
432                         wake_up(&server->response_q);
433                         continue;
434                 } else if (length < 4) {
435                         cFYI(1,
436                             ("Frame under four bytes received (%d bytes long)",
437                               length));
438                         cifs_reconnect(server);
439                         csocket = server->ssocket;
440                         wake_up(&server->response_q);
441                         continue;
442                 }
443
444                 /* The right amount was read from socket - 4 bytes */
445                 /* so we can now interpret the length field */
446
447                 /* the first byte big endian of the length field,
448                 is actually not part of the length but the type
449                 with the most common, zero, as regular data */
450                 temp = *((char *) smb_buffer);
451
452                 /* Note that FC 1001 length is big endian on the wire, 
453                 but we convert it here so it is always manipulated
454                 as host byte order */
455                 pdu_length = ntohl(smb_buffer->smb_buf_length);
456                 smb_buffer->smb_buf_length = pdu_length;
457
458                 cFYI(1,("rfc1002 length 0x%x)", pdu_length+4));
459
460                 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
461                         continue; 
462                 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
463                         cFYI(1,("Good RFC 1002 session rsp"));
464                         continue;
465                 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
466                         /* we get this from Windows 98 instead of 
467                            an error on SMB negprot response */
468                         cFYI(1,("Negative RFC1002 Session Response Error 0x%x)",
469                                 pdu_length));
470                         if(server->tcpStatus == CifsNew) {
471                                 /* if nack on negprot (rather than 
472                                 ret of smb negprot error) reconnecting
473                                 not going to help, ret error to mount */
474                                 break;
475                         } else {
476                                 /* give server a second to
477                                 clean up before reconnect attempt */
478                                 msleep(1000);
479                                 /* always try 445 first on reconnect
480                                 since we get NACK on some if we ever
481                                 connected to port 139 (the NACK is 
482                                 since we do not begin with RFC1001
483                                 session initialize frame) */
484                                 server->addr.sockAddr.sin_port = 
485                                         htons(CIFS_PORT);
486                                 cifs_reconnect(server);
487                                 csocket = server->ssocket;
488                                 wake_up(&server->response_q);
489                                 continue;
490                         }
491                 } else if (temp != (char) 0) {
492                         cERROR(1,("Unknown RFC 1002 frame"));
493                         cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
494                                       length);
495                         cifs_reconnect(server);
496                         csocket = server->ssocket;
497                         continue;
498                 }
499
500                 /* else we have an SMB response */
501                 if((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
502                             (pdu_length < sizeof (struct smb_hdr) - 1 - 4)) {
503                         cERROR(1, ("Invalid size SMB length %d pdu_length %d",
504                                         length, pdu_length+4));
505                         cifs_reconnect(server);
506                         csocket = server->ssocket;
507                         wake_up(&server->response_q);
508                         continue;
509                 } 
510
511                 /* else length ok */
512                 reconnect = 0;
513
514                 if(pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
515                         isLargeBuf = TRUE;
516                         memcpy(bigbuf, smallbuf, 4);
517                         smb_buffer = bigbuf;
518                 }
519                 length = 0;
520                 iov.iov_base = 4 + (char *)smb_buffer;
521                 iov.iov_len = pdu_length;
522                 for (total_read = 0; total_read < pdu_length; 
523                      total_read += length) {
524                         length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
525                                                 pdu_length - total_read, 0);
526                         if((server->tcpStatus == CifsExiting) ||
527                             (length == -EINTR)) {
528                                 /* then will exit */
529                                 reconnect = 2;
530                                 break;
531                         } else if (server->tcpStatus == CifsNeedReconnect) {
532                                 cifs_reconnect(server);
533                                 csocket = server->ssocket;
534                                 /* Reconnect wakes up rspns q */
535                                 /* Now we will reread sock */
536                                 reconnect = 1;
537                                 break;
538                         } else if ((length == -ERESTARTSYS) || 
539                                    (length == -EAGAIN)) {
540                                 msleep(1); /* minimum sleep to prevent looping,
541                                               allowing socket to clear and app 
542                                               threads to set tcpStatus
543                                               CifsNeedReconnect if server hung*/
544                                 continue;
545                         } else if (length <= 0) {
546                                 cERROR(1,("Received no data, expecting %d",
547                                               pdu_length - total_read));
548                                 cifs_reconnect(server);
549                                 csocket = server->ssocket;
550                                 reconnect = 1;
551                                 break;
552                         }
553                 }
554                 if(reconnect == 2)
555                         break;
556                 else if(reconnect == 1)
557                         continue;
558
559                 length += 4; /* account for rfc1002 hdr */
560         
561
562                 dump_smb(smb_buffer, length);
563                 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
564                         cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
565                         continue;
566                 }
567
568
569                 task_to_wake = NULL;
570                 spin_lock(&GlobalMid_Lock);
571                 list_for_each(tmp, &server->pending_mid_q) {
572                         mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
573
574                         if ((mid_entry->mid == smb_buffer->Mid) && 
575                             (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
576                             (mid_entry->command == smb_buffer->Command)) {
577                                 if(check2ndT2(smb_buffer,server->maxBuf) > 0) {
578                                         /* We have a multipart transact2 resp */
579                                         isMultiRsp = TRUE;
580                                         if(mid_entry->resp_buf) {
581                                                 /* merge response - fix up 1st*/
582                                                 if(coalesce_t2(smb_buffer, 
583                                                         mid_entry->resp_buf)) {
584                                                         mid_entry->multiRsp = 1;
585                                                         break;
586                                                 } else {
587                                                         /* all parts received */
588                                                         mid_entry->multiEnd = 1;
589                                                         goto multi_t2_fnd; 
590                                                 }
591                                         } else {
592                                                 if(!isLargeBuf) {
593                                                         cERROR(1,("1st trans2 resp needs bigbuf"));
594                                         /* BB maybe we can fix this up,  switch
595                                            to already allocated large buffer? */
596                                                 } else {
597                                                         /* Have first buffer */
598                                                         mid_entry->resp_buf =
599                                                                  smb_buffer;
600                                                         mid_entry->largeBuf = 1;
601                                                         bigbuf = NULL;
602                                                 }
603                                         }
604                                         break;
605                                 } 
606                                 mid_entry->resp_buf = smb_buffer;
607                                 if(isLargeBuf)
608                                         mid_entry->largeBuf = 1;
609                                 else
610                                         mid_entry->largeBuf = 0;
611 multi_t2_fnd:
612                                 task_to_wake = mid_entry->tsk;
613                                 mid_entry->midState = MID_RESPONSE_RECEIVED;
614 #ifdef CONFIG_CIFS_STATS2
615                                 mid_entry->when_received = jiffies;
616 #endif
617                                 /* so we do not time out requests to  server
618                                 which is still responding (since server could
619                                 be busy but not dead) */
620                                 server->lstrp = jiffies;
621                                 break;
622                         }
623                 }
624                 spin_unlock(&GlobalMid_Lock);
625                 if (task_to_wake) {
626                         /* Was previous buf put in mpx struct for multi-rsp? */
627                         if(!isMultiRsp) {
628                                 /* smb buffer will be freed by user thread */
629                                 if(isLargeBuf) {
630                                         bigbuf = NULL;
631                                 } else
632                                         smallbuf = NULL;
633                         }
634                         wake_up_process(task_to_wake);
635                 } else if ((is_valid_oplock_break(smb_buffer, server) == FALSE)
636                     && (isMultiRsp == FALSE)) {                          
637                         cERROR(1, ("No task to wake, unknown frame rcvd! NumMids %d", midCount.counter));
638                         cifs_dump_mem("Received Data is: ",(char *)smb_buffer,
639                                       sizeof(struct smb_hdr));
640 #ifdef CONFIG_CIFS_DEBUG2
641                         cifs_dump_detail(smb_buffer);
642                         cifs_dump_mids(server);
643 #endif /* CIFS_DEBUG2 */
644                         
645                 }
646         } /* end while !EXITING */
647
648         spin_lock(&GlobalMid_Lock);
649         server->tcpStatus = CifsExiting;
650         server->tsk = NULL;
651         /* check if we have blocked requests that need to free */
652         /* Note that cifs_max_pending is normally 50, but
653         can be set at module install time to as little as two */
654         if(atomic_read(&server->inFlight) >= cifs_max_pending)
655                 atomic_set(&server->inFlight, cifs_max_pending - 1);
656         /* We do not want to set the max_pending too low or we
657         could end up with the counter going negative */
658         spin_unlock(&GlobalMid_Lock);
659         /* Although there should not be any requests blocked on 
660         this queue it can not hurt to be paranoid and try to wake up requests
661         that may haven been blocked when more than 50 at time were on the wire
662         to the same server - they now will see the session is in exit state
663         and get out of SendReceive.  */
664         wake_up_all(&server->request_q);
665         /* give those requests time to exit */
666         msleep(125);
667         
668         if(server->ssocket) {
669                 sock_release(csocket);
670                 server->ssocket = NULL;
671         }
672         /* buffer usuallly freed in free_mid - need to free it here on exit */
673         if (bigbuf != NULL)
674                 cifs_buf_release(bigbuf);
675         if (smallbuf != NULL)
676                 cifs_small_buf_release(smallbuf);
677
678         read_lock(&GlobalSMBSeslock);
679         if (list_empty(&server->pending_mid_q)) {
680                 /* loop through server session structures attached to this and
681                     mark them dead */
682                 list_for_each(tmp, &GlobalSMBSessionList) {
683                         ses =
684                             list_entry(tmp, struct cifsSesInfo,
685                                        cifsSessionList);
686                         if (ses->server == server) {
687                                 ses->status = CifsExiting;
688                                 ses->server = NULL;
689                         }
690                 }
691                 read_unlock(&GlobalSMBSeslock);
692         } else {
693                 /* although we can not zero the server struct pointer yet,
694                 since there are active requests which may depnd on them,
695                 mark the corresponding SMB sessions as exiting too */
696                 list_for_each(tmp, &GlobalSMBSessionList) {
697                         ses = list_entry(tmp, struct cifsSesInfo,
698                                          cifsSessionList);
699                         if (ses->server == server) {
700                                 ses->status = CifsExiting;
701                         }
702                 }
703
704                 spin_lock(&GlobalMid_Lock);
705                 list_for_each(tmp, &server->pending_mid_q) {
706                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
707                         if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
708                                 cFYI(1,
709                                   ("Clearing Mid 0x%x - waking up ",mid_entry->mid));
710                                 task_to_wake = mid_entry->tsk;
711                                 if(task_to_wake) {
712                                         wake_up_process(task_to_wake);
713                                 }
714                         }
715                 }
716                 spin_unlock(&GlobalMid_Lock);
717                 read_unlock(&GlobalSMBSeslock);
718                 /* 1/8th of sec is more than enough time for them to exit */
719                 msleep(125);
720         }
721
722         if (!list_empty(&server->pending_mid_q)) {
723                 /* mpx threads have not exited yet give them 
724                 at least the smb send timeout time for long ops */
725                 /* due to delays on oplock break requests, we need
726                 to wait at least 45 seconds before giving up
727                 on a request getting a response and going ahead
728                 and killing cifsd */
729                 cFYI(1, ("Wait for exit from demultiplex thread"));
730                 msleep(46000);
731                 /* if threads still have not exited they are probably never
732                 coming home not much else we can do but free the memory */
733         }
734
735         write_lock(&GlobalSMBSeslock);
736         atomic_dec(&tcpSesAllocCount);
737         length = tcpSesAllocCount.counter;
738
739         /* last chance to mark ses pointers invalid
740         if there are any pointing to this (e.g
741         if a crazy root user tried to kill cifsd 
742         kernel thread explicitly this might happen) */
743         list_for_each(tmp, &GlobalSMBSessionList) {
744                 ses = list_entry(tmp, struct cifsSesInfo,
745                                 cifsSessionList);
746                 if (ses->server == server) {
747                         ses->server = NULL;
748                 }
749         }
750         write_unlock(&GlobalSMBSeslock);
751
752         kfree(server);
753         if(length  > 0) {
754                 mempool_resize(cifs_req_poolp,
755                         length + cifs_min_rcv,
756                         GFP_KERNEL);
757         }
758         
759         complete_and_exit(&cifsd_complete, 0);
760         return 0;
761 }
762
763 static int
764 cifs_parse_mount_options(char *options, const char *devname,struct smb_vol *vol)
765 {
766         char *value;
767         char *data;
768         unsigned int  temp_len, i, j;
769         char separator[2];
770
771         separator[0] = ',';
772         separator[1] = 0; 
773
774         if(Local_System_Name[0] != 0)
775                 memcpy(vol->source_rfc1001_name, Local_System_Name,15);
776         else {
777                 memset(vol->source_rfc1001_name,0x20,15);
778                 for(i=0;i < strnlen(system_utsname.nodename,15);i++) {
779                         /* does not have to be perfect mapping since field is
780                         informational, only used for servers that do not support
781                         port 445 and it can be overridden at mount time */
782                         vol->source_rfc1001_name[i] = 
783                                 toupper(system_utsname.nodename[i]);
784                 }
785         }
786         vol->source_rfc1001_name[15] = 0;
787         /* null target name indicates to use *SMBSERVR default called name
788            if we end up sending RFC1001 session initialize */
789         vol->target_rfc1001_name[0] = 0;
790         vol->linux_uid = current->uid;  /* current->euid instead? */
791         vol->linux_gid = current->gid;
792         vol->dir_mode = S_IRWXUGO;
793         /* 2767 perms indicate mandatory locking support */
794         vol->file_mode = S_IALLUGO & ~(S_ISUID | S_IXGRP);
795
796         /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
797         vol->rw = TRUE;
798         /* default is always to request posix paths. */
799         vol->posix_paths = 1;
800
801         if (!options)
802                 return 1;
803
804         if(strncmp(options,"sep=",4) == 0) {
805                 if(options[4] != 0) {
806                         separator[0] = options[4];
807                         options += 5;
808                 } else {
809                         cFYI(1,("Null separator not allowed"));
810                 }
811         }
812                 
813         while ((data = strsep(&options, separator)) != NULL) {
814                 if (!*data)
815                         continue;
816                 if ((value = strchr(data, '=')) != NULL)
817                         *value++ = '\0';
818
819                 if (strnicmp(data, "user_xattr",10) == 0) {/*parse before user*/
820                         vol->no_xattr = 0;
821                 } else if (strnicmp(data, "nouser_xattr",12) == 0) {
822                         vol->no_xattr = 1;
823                 } else if (strnicmp(data, "user", 4) == 0) {
824                         if (!value || !*value) {
825                                 printk(KERN_WARNING
826                                        "CIFS: invalid or missing username\n");
827                                 return 1;       /* needs_arg; */
828                         }
829                         if (strnlen(value, 200) < 200) {
830                                 vol->username = value;
831                         } else {
832                                 printk(KERN_WARNING "CIFS: username too long\n");
833                                 return 1;
834                         }
835                 } else if (strnicmp(data, "pass", 4) == 0) {
836                         if (!value) {
837                                 vol->password = NULL;
838                                 continue;
839                         } else if(value[0] == 0) {
840                                 /* check if string begins with double comma
841                                    since that would mean the password really
842                                    does start with a comma, and would not
843                                    indicate an empty string */
844                                 if(value[1] != separator[0]) {
845                                         vol->password = NULL;
846                                         continue;
847                                 }
848                         }
849                         temp_len = strlen(value);
850                         /* removed password length check, NTLM passwords
851                                 can be arbitrarily long */
852
853                         /* if comma in password, the string will be 
854                         prematurely null terminated.  Commas in password are
855                         specified across the cifs mount interface by a double
856                         comma ie ,, and a comma used as in other cases ie ','
857                         as a parameter delimiter/separator is single and due
858                         to the strsep above is temporarily zeroed. */
859
860                         /* NB: password legally can have multiple commas and
861                         the only illegal character in a password is null */
862
863                         if ((value[temp_len] == 0) && 
864                             (value[temp_len+1] == separator[0])) {
865                                 /* reinsert comma */
866                                 value[temp_len] = separator[0];
867                                 temp_len+=2;  /* move after the second comma */
868                                 while(value[temp_len] != 0)  {
869                                         if (value[temp_len] == separator[0]) {
870                                                 if (value[temp_len+1] == 
871                                                      separator[0]) {
872                                                 /* skip second comma */
873                                                         temp_len++;
874                                                 } else { 
875                                                 /* single comma indicating start
876                                                          of next parm */
877                                                         break;
878                                                 }
879                                         }
880                                         temp_len++;
881                                 }
882                                 if(value[temp_len] == 0) {
883                                         options = NULL;
884                                 } else {
885                                         value[temp_len] = 0;
886                                         /* point option to start of next parm */
887                                         options = value + temp_len + 1;
888                                 }
889                                 /* go from value to value + temp_len condensing 
890                                 double commas to singles. Note that this ends up
891                                 allocating a few bytes too many, which is ok */
892                                 vol->password = kzalloc(temp_len, GFP_KERNEL);
893                                 if(vol->password == NULL) {
894                                         printk("CIFS: no memory for pass\n");
895                                         return 1;
896                                 }
897                                 for(i=0,j=0;i<temp_len;i++,j++) {
898                                         vol->password[j] = value[i];
899                                         if(value[i] == separator[0]
900                                                 && value[i+1] == separator[0]) {
901                                                 /* skip second comma */
902                                                 i++;
903                                         }
904                                 }
905                                 vol->password[j] = 0;
906                         } else {
907                                 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
908                                 if(vol->password == NULL) {
909                                         printk("CIFS: no memory for pass\n");
910                                         return 1;
911                                 }
912                                 strcpy(vol->password, value);
913                         }
914                 } else if (strnicmp(data, "ip", 2) == 0) {
915                         if (!value || !*value) {
916                                 vol->UNCip = NULL;
917                         } else if (strnlen(value, 35) < 35) {
918                                 vol->UNCip = value;
919                         } else {
920                                 printk(KERN_WARNING "CIFS: ip address too long\n");
921                                 return 1;
922                         }
923                 } else if (strnicmp(data, "sec", 3) == 0) { 
924                         if (!value || !*value) {
925                                 cERROR(1,("no security value specified"));
926                                 continue;
927                         } else if (strnicmp(value, "krb5i", 5) == 0) {
928                                 vol->secFlg |= CIFSSEC_MAY_KRB5 | 
929                                         CIFSSEC_MUST_SIGN;
930                         } else if (strnicmp(value, "krb5p", 5) == 0) {
931                                 /* vol->secFlg |= CIFSSEC_MUST_SEAL | 
932                                         CIFSSEC_MAY_KRB5; */ 
933                                 cERROR(1,("Krb5 cifs privacy not supported"));
934                                 return 1;
935                         } else if (strnicmp(value, "krb5", 4) == 0) {
936                                 vol->secFlg |= CIFSSEC_MAY_KRB5;
937                         } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
938                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
939                                         CIFSSEC_MUST_SIGN;
940                         } else if (strnicmp(value, "ntlmv2", 6) == 0) {
941                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
942                         } else if (strnicmp(value, "ntlmi", 5) == 0) {
943                                 vol->secFlg |= CIFSSEC_MAY_NTLM |
944                                         CIFSSEC_MUST_SIGN;
945                         } else if (strnicmp(value, "ntlm", 4) == 0) {
946                                 /* ntlm is default so can be turned off too */
947                                 vol->secFlg |= CIFSSEC_MAY_NTLM;
948                         } else if (strnicmp(value, "nontlm", 6) == 0) {
949                                 /* BB is there a better way to do this? */
950                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
951 #ifdef CONFIG_CIFS_WEAK_PW_HASH
952                         } else if (strnicmp(value, "lanman", 6) == 0) {
953                                 vol->secFlg |= CIFSSEC_MAY_LANMAN;
954 #endif
955                         } else if (strnicmp(value, "none", 4) == 0) {
956                                 vol->nullauth = 1;
957                         } else {
958                                 cERROR(1,("bad security option: %s", value));
959                                 return 1;
960                         }
961                 } else if ((strnicmp(data, "unc", 3) == 0)
962                            || (strnicmp(data, "target", 6) == 0)
963                            || (strnicmp(data, "path", 4) == 0)) {
964                         if (!value || !*value) {
965                                 printk(KERN_WARNING
966                                        "CIFS: invalid path to network resource\n");
967                                 return 1;       /* needs_arg; */
968                         }
969                         if ((temp_len = strnlen(value, 300)) < 300) {
970                                 vol->UNC = kmalloc(temp_len+1,GFP_KERNEL);
971                                 if(vol->UNC == NULL)
972                                         return 1;
973                                 strcpy(vol->UNC,value);
974                                 if (strncmp(vol->UNC, "//", 2) == 0) {
975                                         vol->UNC[0] = '\\';
976                                         vol->UNC[1] = '\\';
977                                 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {                    
978                                         printk(KERN_WARNING
979                                                "CIFS: UNC Path does not begin with // or \\\\ \n");
980                                         return 1;
981                                 }
982                         } else {
983                                 printk(KERN_WARNING "CIFS: UNC name too long\n");
984                                 return 1;
985                         }
986                 } else if ((strnicmp(data, "domain", 3) == 0)
987                            || (strnicmp(data, "workgroup", 5) == 0)) {
988                         if (!value || !*value) {
989                                 printk(KERN_WARNING "CIFS: invalid domain name\n");
990                                 return 1;       /* needs_arg; */
991                         }
992                         /* BB are there cases in which a comma can be valid in
993                         a domain name and need special handling? */
994                         if (strnlen(value, 256) < 256) {
995                                 vol->domainname = value;
996                                 cFYI(1, ("Domain name set"));
997                         } else {
998                                 printk(KERN_WARNING "CIFS: domain name too long\n");
999                                 return 1;
1000                         }
1001                 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1002                         if (!value || !*value) {
1003                                 printk(KERN_WARNING
1004                                        "CIFS: invalid path prefix\n");
1005                                 return 1;       /* needs_arg; */
1006                         }
1007                         if ((temp_len = strnlen(value, 1024)) < 1024) {
1008                                 if(value[0] != '/')
1009                                         temp_len++;  /* missing leading slash */
1010                                 vol->prepath = kmalloc(temp_len+1,GFP_KERNEL);
1011                                 if(vol->prepath == NULL)
1012                                         return 1;
1013                                 if(value[0] != '/') {
1014                                         vol->prepath[0] = '/';
1015                                         strcpy(vol->prepath+1,value);
1016                                 } else
1017                                         strcpy(vol->prepath,value);
1018                                 cFYI(1,("prefix path %s",vol->prepath));
1019                         } else {
1020                                 printk(KERN_WARNING "CIFS: prefix too long\n");
1021                                 return 1;
1022                         }
1023                 } else if (strnicmp(data, "iocharset", 9) == 0) {
1024                         if (!value || !*value) {
1025                                 printk(KERN_WARNING "CIFS: invalid iocharset specified\n");
1026                                 return 1;       /* needs_arg; */
1027                         }
1028                         if (strnlen(value, 65) < 65) {
1029                                 if(strnicmp(value,"default",7))
1030                                         vol->iocharset = value;
1031                                 /* if iocharset not set load_nls_default used by caller */
1032                                 cFYI(1, ("iocharset set to %s",value));
1033                         } else {
1034                                 printk(KERN_WARNING "CIFS: iocharset name too long.\n");
1035                                 return 1;
1036                         }
1037                 } else if (strnicmp(data, "uid", 3) == 0) {
1038                         if (value && *value) {
1039                                 vol->linux_uid =
1040                                         simple_strtoul(value, &value, 0);
1041                         }
1042                 } else if (strnicmp(data, "gid", 3) == 0) {
1043                         if (value && *value) {
1044                                 vol->linux_gid =
1045                                         simple_strtoul(value, &value, 0);
1046                         }
1047                 } else if (strnicmp(data, "file_mode", 4) == 0) {
1048                         if (value && *value) {
1049                                 vol->file_mode =
1050                                         simple_strtoul(value, &value, 0);
1051                         }
1052                 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1053                         if (value && *value) {
1054                                 vol->dir_mode =
1055                                         simple_strtoul(value, &value, 0);
1056                         }
1057                 } else if (strnicmp(data, "dirmode", 4) == 0) {
1058                         if (value && *value) {
1059                                 vol->dir_mode =
1060                                         simple_strtoul(value, &value, 0);
1061                         }
1062                 } else if (strnicmp(data, "port", 4) == 0) {
1063                         if (value && *value) {
1064                                 vol->port =
1065                                         simple_strtoul(value, &value, 0);
1066                         }
1067                 } else if (strnicmp(data, "rsize", 5) == 0) {
1068                         if (value && *value) {
1069                                 vol->rsize =
1070                                         simple_strtoul(value, &value, 0);
1071                         }
1072                 } else if (strnicmp(data, "wsize", 5) == 0) {
1073                         if (value && *value) {
1074                                 vol->wsize =
1075                                         simple_strtoul(value, &value, 0);
1076                         }
1077                 } else if (strnicmp(data, "sockopt", 5) == 0) {
1078                         if (value && *value) {
1079                                 vol->sockopt =
1080                                         simple_strtoul(value, &value, 0);
1081                         }
1082                 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1083                         if (!value || !*value || (*value == ' ')) {
1084                                 cFYI(1,("invalid (empty) netbiosname specified"));
1085                         } else {
1086                                 memset(vol->source_rfc1001_name,0x20,15);
1087                                 for(i=0;i<15;i++) {
1088                                 /* BB are there cases in which a comma can be 
1089                                 valid in this workstation netbios name (and need
1090                                 special handling)? */
1091
1092                                 /* We do not uppercase netbiosname for user */
1093                                         if (value[i]==0)
1094                                                 break;
1095                                         else 
1096                                                 vol->source_rfc1001_name[i] = value[i];
1097                                 }
1098                                 /* The string has 16th byte zero still from
1099                                 set at top of the function  */
1100                                 if((i==15) && (value[i] != 0))
1101                                         printk(KERN_WARNING "CIFS: netbiosname longer than 15 truncated.\n");
1102                         }
1103                 } else if (strnicmp(data, "servern", 7) == 0) {
1104                         /* servernetbiosname specified override *SMBSERVER */
1105                         if (!value || !*value || (*value == ' ')) {
1106                                 cFYI(1,("empty server netbiosname specified"));
1107                         } else {
1108                                 /* last byte, type, is 0x20 for servr type */
1109                                 memset(vol->target_rfc1001_name,0x20,16);
1110
1111                                 for(i=0;i<15;i++) {
1112                                 /* BB are there cases in which a comma can be
1113                                    valid in this workstation netbios name (and need
1114                                    special handling)? */
1115
1116                                 /* user or mount helper must uppercase netbiosname */
1117                                         if (value[i]==0)
1118                                                 break;
1119                                         else
1120                                                 vol->target_rfc1001_name[i] = value[i];
1121                                 }
1122                                 /* The string has 16th byte zero still from
1123                                    set at top of the function  */
1124                                 if((i==15) && (value[i] != 0))
1125                                         printk(KERN_WARNING "CIFS: server netbiosname longer than 15 truncated.\n");
1126                         }
1127                 } else if (strnicmp(data, "credentials", 4) == 0) {
1128                         /* ignore */
1129                 } else if (strnicmp(data, "version", 3) == 0) {
1130                         /* ignore */
1131                 } else if (strnicmp(data, "guest",5) == 0) {
1132                         /* ignore */
1133                 } else if (strnicmp(data, "rw", 2) == 0) {
1134                         vol->rw = TRUE;
1135                 } else if ((strnicmp(data, "suid", 4) == 0) ||
1136                                    (strnicmp(data, "nosuid", 6) == 0) ||
1137                                    (strnicmp(data, "exec", 4) == 0) ||
1138                                    (strnicmp(data, "noexec", 6) == 0) ||
1139                                    (strnicmp(data, "nodev", 5) == 0) ||
1140                                    (strnicmp(data, "noauto", 6) == 0) ||
1141                                    (strnicmp(data, "dev", 3) == 0)) {
1142                         /*  The mount tool or mount.cifs helper (if present)
1143                                 uses these opts to set flags, and the flags are read
1144                                 by the kernel vfs layer before we get here (ie
1145                                 before read super) so there is no point trying to
1146                                 parse these options again and set anything and it
1147                                 is ok to just ignore them */
1148                         continue;
1149                 } else if (strnicmp(data, "ro", 2) == 0) {
1150                         vol->rw = FALSE;
1151                 } else if (strnicmp(data, "hard", 4) == 0) {
1152                         vol->retry = 1;
1153                 } else if (strnicmp(data, "soft", 4) == 0) {
1154                         vol->retry = 0;
1155                 } else if (strnicmp(data, "perm", 4) == 0) {
1156                         vol->noperm = 0;
1157                 } else if (strnicmp(data, "noperm", 6) == 0) {
1158                         vol->noperm = 1;
1159                 } else if (strnicmp(data, "mapchars", 8) == 0) {
1160                         vol->remap = 1;
1161                 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1162                         vol->remap = 0;
1163                 } else if (strnicmp(data, "sfu", 3) == 0) {
1164                         vol->sfu_emul = 1;
1165                 } else if (strnicmp(data, "nosfu", 5) == 0) {
1166                         vol->sfu_emul = 0;
1167                 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1168                         vol->posix_paths = 1;
1169                 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1170                         vol->posix_paths = 0;
1171                 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1172                            (strnicmp(data, "ignorecase", 10)  == 0)) {
1173                         vol->nocase = 1;
1174                 } else if (strnicmp(data, "brl", 3) == 0) {
1175                         vol->nobrl =  0;
1176                 } else if ((strnicmp(data, "nobrl", 5) == 0) || 
1177                            (strnicmp(data, "nolock", 6) == 0)) {
1178                         vol->nobrl =  1;
1179                         /* turn off mandatory locking in mode
1180                         if remote locking is turned off since the
1181                         local vfs will do advisory */
1182                         if(vol->file_mode == (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1183                                 vol->file_mode = S_IALLUGO;
1184                 } else if (strnicmp(data, "setuids", 7) == 0) {
1185                         vol->setuids = 1;
1186                 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1187                         vol->setuids = 0;
1188                 } else if (strnicmp(data, "nohard", 6) == 0) {
1189                         vol->retry = 0;
1190                 } else if (strnicmp(data, "nosoft", 6) == 0) {
1191                         vol->retry = 1;
1192                 } else if (strnicmp(data, "nointr", 6) == 0) {
1193                         vol->intr = 0;
1194                 } else if (strnicmp(data, "intr", 4) == 0) {
1195                         vol->intr = 1;
1196                 } else if (strnicmp(data, "serverino",7) == 0) {
1197                         vol->server_ino = 1;
1198                 } else if (strnicmp(data, "noserverino",9) == 0) {
1199                         vol->server_ino = 0;
1200                 } else if (strnicmp(data, "cifsacl",7) == 0) {
1201                         vol->cifs_acl = 1;
1202                 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1203                         vol->cifs_acl = 0;
1204                 } else if (strnicmp(data, "acl",3) == 0) {
1205                         vol->no_psx_acl = 0;
1206                 } else if (strnicmp(data, "noacl",5) == 0) {
1207                         vol->no_psx_acl = 1;
1208                 } else if (strnicmp(data, "sign",4) == 0) {
1209                         vol->secFlg |= CIFSSEC_MUST_SIGN;
1210 /*              } else if (strnicmp(data, "seal",4) == 0) {
1211                         vol->secFlg |= CIFSSEC_MUST_SEAL; */
1212                 } else if (strnicmp(data, "direct",6) == 0) {
1213                         vol->direct_io = 1;
1214                 } else if (strnicmp(data, "forcedirectio",13) == 0) {
1215                         vol->direct_io = 1;
1216                 } else if (strnicmp(data, "in6_addr",8) == 0) {
1217                         if (!value || !*value) {
1218                                 vol->in6_addr = NULL;
1219                         } else if (strnlen(value, 49) == 48) {
1220                                 vol->in6_addr = value;
1221                         } else {
1222                                 printk(KERN_WARNING "CIFS: ip v6 address not 48 characters long\n");
1223                                 return 1;
1224                         }
1225                 } else if (strnicmp(data, "noac", 4) == 0) {
1226                         printk(KERN_WARNING "CIFS: Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n");
1227                 } else
1228                         printk(KERN_WARNING "CIFS: Unknown mount option %s\n",data);
1229         }
1230         if (vol->UNC == NULL) {
1231                 if(devname == NULL) {
1232                         printk(KERN_WARNING "CIFS: Missing UNC name for mount target\n");
1233                         return 1;
1234                 }
1235                 if ((temp_len = strnlen(devname, 300)) < 300) {
1236                         vol->UNC = kmalloc(temp_len+1,GFP_KERNEL);
1237                         if(vol->UNC == NULL)
1238                                 return 1;
1239                         strcpy(vol->UNC,devname);
1240                         if (strncmp(vol->UNC, "//", 2) == 0) {
1241                                 vol->UNC[0] = '\\';
1242                                 vol->UNC[1] = '\\';
1243                         } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1244                                 printk(KERN_WARNING "CIFS: UNC Path does not begin with // or \\\\ \n");
1245                                 return 1;
1246                         }
1247                 } else {
1248                         printk(KERN_WARNING "CIFS: UNC name too long\n");
1249                         return 1;
1250                 }
1251         }
1252         if(vol->UNCip == NULL)
1253                 vol->UNCip = &vol->UNC[2];
1254
1255         return 0;
1256 }
1257
1258 static struct cifsSesInfo *
1259 cifs_find_tcp_session(struct in_addr * target_ip_addr, 
1260                 struct in6_addr *target_ip6_addr,
1261                  char *userName, struct TCP_Server_Info **psrvTcp)
1262 {
1263         struct list_head *tmp;
1264         struct cifsSesInfo *ses;
1265         *psrvTcp = NULL;
1266         read_lock(&GlobalSMBSeslock);
1267
1268         list_for_each(tmp, &GlobalSMBSessionList) {
1269                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
1270                 if (ses->server) {
1271                         if((target_ip_addr && 
1272                                 (ses->server->addr.sockAddr.sin_addr.s_addr
1273                                   == target_ip_addr->s_addr)) || (target_ip6_addr
1274                                 && memcmp(&ses->server->addr.sockAddr6.sin6_addr,
1275                                         target_ip6_addr,sizeof(*target_ip6_addr)))){
1276                                 /* BB lock server and tcp session and increment use count here?? */
1277                                 *psrvTcp = ses->server; /* found a match on the TCP session */
1278                                 /* BB check if reconnection needed */
1279                                 if (strncmp
1280                                     (ses->userName, userName,
1281                                      MAX_USERNAME_SIZE) == 0){
1282                                         read_unlock(&GlobalSMBSeslock);
1283                                         return ses;     /* found exact match on both tcp and SMB sessions */
1284                                 }
1285                         }
1286                 }
1287                 /* else tcp and smb sessions need reconnection */
1288         }
1289         read_unlock(&GlobalSMBSeslock);
1290         return NULL;
1291 }
1292
1293 static struct cifsTconInfo *
1294 find_unc(__be32 new_target_ip_addr, char *uncName, char *userName)
1295 {
1296         struct list_head *tmp;
1297         struct cifsTconInfo *tcon;
1298
1299         read_lock(&GlobalSMBSeslock);
1300         list_for_each(tmp, &GlobalTreeConnectionList) {
1301                 cFYI(1, ("Next tcon"));
1302                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
1303                 if (tcon->ses) {
1304                         if (tcon->ses->server) {
1305                                 cFYI(1,
1306                                      ("old ip addr: %x == new ip %x ?",
1307                                       tcon->ses->server->addr.sockAddr.sin_addr.
1308                                       s_addr, new_target_ip_addr));
1309                                 if (tcon->ses->server->addr.sockAddr.sin_addr.
1310                                     s_addr == new_target_ip_addr) {
1311         /* BB lock tcon, server and tcp session and increment use count here? */
1312                                         /* found a match on the TCP session */
1313                                         /* BB check if reconnection needed */
1314                                         cFYI(1,("IP match, old UNC: %s new: %s",
1315                                               tcon->treeName, uncName));
1316                                         if (strncmp
1317                                             (tcon->treeName, uncName,
1318                                              MAX_TREE_SIZE) == 0) {
1319                                                 cFYI(1,
1320                                                      ("and old usr: %s new: %s",
1321                                                       tcon->treeName, uncName));
1322                                                 if (strncmp
1323                                                     (tcon->ses->userName,
1324                                                      userName,
1325                                                      MAX_USERNAME_SIZE) == 0) {
1326                                                         read_unlock(&GlobalSMBSeslock);
1327                                                         /* matched smb session
1328                                                         (user name */
1329                                                         return tcon;
1330                                                 }
1331                                         }
1332                                 }
1333                         }
1334                 }
1335         }
1336         read_unlock(&GlobalSMBSeslock);
1337         return NULL;
1338 }
1339
1340 int
1341 connect_to_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1342                     const char *old_path, const struct nls_table *nls_codepage,
1343                     int remap)
1344 {
1345         unsigned char *referrals = NULL;
1346         unsigned int num_referrals;
1347         int rc = 0;
1348
1349         rc = get_dfs_path(xid, pSesInfo,old_path, nls_codepage, 
1350                         &num_referrals, &referrals, remap);
1351
1352         /* BB Add in code to: if valid refrl, if not ip address contact
1353                 the helper that resolves tcp names, mount to it, try to 
1354                 tcon to it unmount it if fail */
1355
1356         kfree(referrals);
1357
1358         return rc;
1359 }
1360
1361 int
1362 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1363                         const char *old_path, const struct nls_table *nls_codepage, 
1364                         unsigned int *pnum_referrals, 
1365                         unsigned char ** preferrals, int remap)
1366 {
1367         char *temp_unc;
1368         int rc = 0;
1369
1370         *pnum_referrals = 0;
1371
1372         if (pSesInfo->ipc_tid == 0) {
1373                 temp_unc = kmalloc(2 /* for slashes */ +
1374                         strnlen(pSesInfo->serverName,SERVER_NAME_LEN_WITH_NULL * 2)
1375                                  + 1 + 4 /* slash IPC$ */  + 2,
1376                                 GFP_KERNEL);
1377                 if (temp_unc == NULL)
1378                         return -ENOMEM;
1379                 temp_unc[0] = '\\';
1380                 temp_unc[1] = '\\';
1381                 strcpy(temp_unc + 2, pSesInfo->serverName);
1382                 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1383                 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1384                 cFYI(1,
1385                      ("CIFS Tcon rc = %d ipc_tid = %d", rc,pSesInfo->ipc_tid));
1386                 kfree(temp_unc);
1387         }
1388         if (rc == 0)
1389                 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1390                                      pnum_referrals, nls_codepage, remap);
1391
1392         return rc;
1393 }
1394
1395 /* See RFC1001 section 14 on representation of Netbios names */
1396 static void rfc1002mangle(char * target,char * source, unsigned int length)
1397 {
1398         unsigned int i,j;
1399
1400         for(i=0,j=0;i<(length);i++) {
1401                 /* mask a nibble at a time and encode */
1402                 target[j] = 'A' + (0x0F & (source[i] >> 4));
1403                 target[j+1] = 'A' + (0x0F & source[i]);
1404                 j+=2;
1405         }
1406
1407 }
1408
1409
1410 static int
1411 ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket, 
1412              char * netbios_name, char * target_name)
1413 {
1414         int rc = 0;
1415         int connected = 0;
1416         __be16 orig_port = 0;
1417
1418         if(*csocket == NULL) {
1419                 rc = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, csocket);
1420                 if (rc < 0) {
1421                         cERROR(1, ("Error %d creating socket",rc));
1422                         *csocket = NULL;
1423                         return rc;
1424                 } else {
1425                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1426                         cFYI(1,("Socket created"));
1427                         (*csocket)->sk->sk_allocation = GFP_NOFS; 
1428                 }
1429         }
1430
1431         psin_server->sin_family = AF_INET;
1432         if(psin_server->sin_port) { /* user overrode default port */
1433                 rc = (*csocket)->ops->connect(*csocket,
1434                                 (struct sockaddr *) psin_server,
1435                                 sizeof (struct sockaddr_in),0);
1436                 if (rc >= 0)
1437                         connected = 1;
1438         } 
1439
1440         if(!connected) {
1441                 /* save original port so we can retry user specified port  
1442                         later if fall back ports fail this time  */
1443                 orig_port = psin_server->sin_port;
1444
1445                 /* do not retry on the same port we just failed on */
1446                 if(psin_server->sin_port != htons(CIFS_PORT)) {
1447                         psin_server->sin_port = htons(CIFS_PORT);
1448
1449                         rc = (*csocket)->ops->connect(*csocket,
1450                                         (struct sockaddr *) psin_server,
1451                                         sizeof (struct sockaddr_in),0);
1452                         if (rc >= 0)
1453                                 connected = 1;
1454                 }
1455         }
1456         if (!connected) {
1457                 psin_server->sin_port = htons(RFC1001_PORT);
1458                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1459                                               psin_server, sizeof (struct sockaddr_in),0);
1460                 if (rc >= 0) 
1461                         connected = 1;
1462         }
1463
1464         /* give up here - unless we want to retry on different
1465                 protocol families some day */
1466         if (!connected) {
1467                 if(orig_port)
1468                         psin_server->sin_port = orig_port;
1469                 cFYI(1,("Error %d connecting to server via ipv4",rc));
1470                 sock_release(*csocket);
1471                 *csocket = NULL;
1472                 return rc;
1473         }
1474         /* Eventually check for other socket options to change from 
1475                 the default. sock_setsockopt not used because it expects 
1476                 user space buffer */
1477          cFYI(1,("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",(*csocket)->sk->sk_sndbuf,
1478                  (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
1479         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1480         /* make the bufsizes depend on wsize/rsize and max requests */
1481         if((*csocket)->sk->sk_sndbuf < (200 * 1024))
1482                 (*csocket)->sk->sk_sndbuf = 200 * 1024;
1483         if((*csocket)->sk->sk_rcvbuf < (140 * 1024))
1484                 (*csocket)->sk->sk_rcvbuf = 140 * 1024;
1485
1486         /* send RFC1001 sessinit */
1487         if(psin_server->sin_port == htons(RFC1001_PORT)) {
1488                 /* some servers require RFC1001 sessinit before sending
1489                 negprot - BB check reconnection in case where second 
1490                 sessinit is sent but no second negprot */
1491                 struct rfc1002_session_packet * ses_init_buf;
1492                 struct smb_hdr * smb_buf;
1493                 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), GFP_KERNEL);
1494                 if(ses_init_buf) {
1495                         ses_init_buf->trailer.session_req.called_len = 32;
1496                         if(target_name && (target_name[0] != 0)) {
1497                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1498                                         target_name, 16);
1499                         } else {
1500                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1501                                         DEFAULT_CIFS_CALLED_NAME,16);
1502                         }
1503
1504                         ses_init_buf->trailer.session_req.calling_len = 32;
1505                         /* calling name ends in null (byte 16) from old smb
1506                         convention. */
1507                         if(netbios_name && (netbios_name[0] !=0)) {
1508                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1509                                         netbios_name,16);
1510                         } else {
1511                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1512                                         "LINUX_CIFS_CLNT",16);
1513                         }
1514                         ses_init_buf->trailer.session_req.scope1 = 0;
1515                         ses_init_buf->trailer.session_req.scope2 = 0;
1516                         smb_buf = (struct smb_hdr *)ses_init_buf;
1517                         /* sizeof RFC1002_SESSION_REQUEST with no scope */
1518                         smb_buf->smb_buf_length = 0x81000044;
1519                         rc = smb_send(*csocket, smb_buf, 0x44,
1520                                 (struct sockaddr *)psin_server);
1521                         kfree(ses_init_buf);
1522                         msleep(1); /* RFC1001 layer in at least one server 
1523                                       requires very short break before negprot
1524                                       presumably because not expecting negprot
1525                                       to follow so fast.  This is a simple
1526                                       solution that works without 
1527                                       complicating the code and causes no
1528                                       significant slowing down on mount
1529                                       for everyone else */
1530                 }
1531                 /* else the negprot may still work without this 
1532                 even though malloc failed */
1533                 
1534         }
1535                 
1536         return rc;
1537 }
1538
1539 static int
1540 ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
1541 {
1542         int rc = 0;
1543         int connected = 0;
1544         __be16 orig_port = 0;
1545
1546         if(*csocket == NULL) {
1547                 rc = sock_create_kern(PF_INET6, SOCK_STREAM, IPPROTO_TCP, csocket);
1548                 if (rc < 0) {
1549                         cERROR(1, ("Error %d creating ipv6 socket",rc));
1550                         *csocket = NULL;
1551                         return rc;
1552                 } else {
1553                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1554                          cFYI(1,("ipv6 Socket created"));
1555                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1556                 }
1557         }
1558
1559         psin_server->sin6_family = AF_INET6;
1560
1561         if(psin_server->sin6_port) { /* user overrode default port */
1562                 rc = (*csocket)->ops->connect(*csocket,
1563                                 (struct sockaddr *) psin_server,
1564                                 sizeof (struct sockaddr_in6),0);
1565                 if (rc >= 0)
1566                         connected = 1;
1567         } 
1568
1569         if(!connected) {
1570                 /* save original port so we can retry user specified port  
1571                         later if fall back ports fail this time  */
1572
1573                 orig_port = psin_server->sin6_port;
1574                 /* do not retry on the same port we just failed on */
1575                 if(psin_server->sin6_port != htons(CIFS_PORT)) {
1576                         psin_server->sin6_port = htons(CIFS_PORT);
1577
1578                         rc = (*csocket)->ops->connect(*csocket,
1579                                         (struct sockaddr *) psin_server,
1580                                         sizeof (struct sockaddr_in6),0);
1581                         if (rc >= 0)
1582                                 connected = 1;
1583                 }
1584         }
1585         if (!connected) {
1586                 psin_server->sin6_port = htons(RFC1001_PORT);
1587                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1588                                          psin_server, sizeof (struct sockaddr_in6),0);
1589                 if (rc >= 0) 
1590                         connected = 1;
1591         }
1592
1593         /* give up here - unless we want to retry on different
1594                 protocol families some day */
1595         if (!connected) {
1596                 if(orig_port)
1597                         psin_server->sin6_port = orig_port;
1598                 cFYI(1,("Error %d connecting to server via ipv6",rc));
1599                 sock_release(*csocket);
1600                 *csocket = NULL;
1601                 return rc;
1602         }
1603         /* Eventually check for other socket options to change from 
1604                 the default. sock_setsockopt not used because it expects 
1605                 user space buffer */
1606         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1607                 
1608         return rc;
1609 }
1610
1611 int
1612 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
1613            char *mount_data, const char *devname)
1614 {
1615         int rc = 0;
1616         int xid;
1617         int address_type = AF_INET;
1618         struct socket *csocket = NULL;
1619         struct sockaddr_in sin_server;
1620         struct sockaddr_in6 sin_server6;
1621         struct smb_vol volume_info;
1622         struct cifsSesInfo *pSesInfo = NULL;
1623         struct cifsSesInfo *existingCifsSes = NULL;
1624         struct cifsTconInfo *tcon = NULL;
1625         struct TCP_Server_Info *srvTcp = NULL;
1626
1627         xid = GetXid();
1628
1629 /* cFYI(1, ("Entering cifs_mount. Xid: %d with: %s", xid, mount_data)); */
1630         
1631         memset(&volume_info,0,sizeof(struct smb_vol));
1632         if (cifs_parse_mount_options(mount_data, devname, &volume_info)) {
1633                 kfree(volume_info.UNC);
1634                 kfree(volume_info.password);
1635                 kfree(volume_info.prepath);
1636                 FreeXid(xid);
1637                 return -EINVAL;
1638         }
1639
1640         if (volume_info.username) {
1641                 /* BB fixme parse for domain name here */
1642                 cFYI(1, ("Username: %s ", volume_info.username));
1643
1644         } else {
1645                 cifserror("No username specified");
1646         /* In userspace mount helper we can get user name from alternate
1647            locations such as env variables and files on disk */
1648                 kfree(volume_info.UNC);
1649                 kfree(volume_info.password);
1650                 kfree(volume_info.prepath);
1651                 FreeXid(xid);
1652                 return -EINVAL;
1653         }
1654
1655         if (volume_info.UNCip && volume_info.UNC) {
1656                 rc = cifs_inet_pton(AF_INET, volume_info.UNCip,&sin_server.sin_addr.s_addr);
1657
1658                 if(rc <= 0) {
1659                         /* not ipv4 address, try ipv6 */
1660                         rc = cifs_inet_pton(AF_INET6,volume_info.UNCip,&sin_server6.sin6_addr.in6_u); 
1661                         if(rc > 0)
1662                                 address_type = AF_INET6;
1663                 } else {
1664                         address_type = AF_INET;
1665                 }
1666        
1667                 if(rc <= 0) {
1668                         /* we failed translating address */
1669                         kfree(volume_info.UNC);
1670                         kfree(volume_info.password);
1671                         kfree(volume_info.prepath);
1672                         FreeXid(xid);
1673                         return -EINVAL;
1674                 }
1675
1676                 cFYI(1, ("UNC: %s ip: %s", volume_info.UNC, volume_info.UNCip));
1677                 /* success */
1678                 rc = 0;
1679         } else if (volume_info.UNCip){
1680                 /* BB using ip addr as server name connect to the DFS root below */
1681                 cERROR(1,("Connecting to DFS root not implemented yet"));
1682                 kfree(volume_info.UNC);
1683                 kfree(volume_info.password);
1684                 kfree(volume_info.prepath);
1685                 FreeXid(xid);
1686                 return -EINVAL;
1687         } else /* which servers DFS root would we conect to */ {
1688                 cERROR(1,
1689                        ("CIFS mount error: No UNC path (e.g. -o unc=//192.168.1.100/public) specified"));
1690                 kfree(volume_info.UNC);
1691                 kfree(volume_info.password);
1692                 kfree(volume_info.prepath);
1693                 FreeXid(xid);
1694                 return -EINVAL;
1695         }
1696
1697         /* this is needed for ASCII cp to Unicode converts */
1698         if(volume_info.iocharset == NULL) {
1699                 cifs_sb->local_nls = load_nls_default();
1700         /* load_nls_default can not return null */
1701         } else {
1702                 cifs_sb->local_nls = load_nls(volume_info.iocharset);
1703                 if(cifs_sb->local_nls == NULL) {
1704                         cERROR(1,("CIFS mount error: iocharset %s not found",volume_info.iocharset));
1705                         kfree(volume_info.UNC);
1706                         kfree(volume_info.password);
1707                         kfree(volume_info.prepath);
1708                         FreeXid(xid);
1709                         return -ELIBACC;
1710                 }
1711         }
1712
1713         if(address_type == AF_INET)
1714                 existingCifsSes = cifs_find_tcp_session(&sin_server.sin_addr,
1715                         NULL /* no ipv6 addr */,
1716                         volume_info.username, &srvTcp);
1717         else if(address_type == AF_INET6)
1718                 existingCifsSes = cifs_find_tcp_session(NULL /* no ipv4 addr */,
1719                         &sin_server6.sin6_addr,
1720                         volume_info.username, &srvTcp);
1721         else {
1722                 kfree(volume_info.UNC);
1723                 kfree(volume_info.password);
1724                 kfree(volume_info.prepath);
1725                 FreeXid(xid);
1726                 return -EINVAL;
1727         }
1728
1729
1730         if (srvTcp) {
1731                 cFYI(1, ("Existing tcp session with server found"));                
1732         } else {        /* create socket */
1733                 if(volume_info.port)
1734                         sin_server.sin_port = htons(volume_info.port);
1735                 else
1736                         sin_server.sin_port = 0;
1737                 rc = ipv4_connect(&sin_server,&csocket,
1738                                   volume_info.source_rfc1001_name,
1739                                   volume_info.target_rfc1001_name);
1740                 if (rc < 0) {
1741                         cERROR(1,
1742                                ("Error connecting to IPv4 socket. Aborting operation"));
1743                         if(csocket != NULL)
1744                                 sock_release(csocket);
1745                         kfree(volume_info.UNC);
1746                         kfree(volume_info.password);
1747                         kfree(volume_info.prepath);
1748                         FreeXid(xid);
1749                         return rc;
1750                 }
1751
1752                 srvTcp = kmalloc(sizeof (struct TCP_Server_Info), GFP_KERNEL);
1753                 if (srvTcp == NULL) {
1754                         rc = -ENOMEM;
1755                         sock_release(csocket);
1756                         kfree(volume_info.UNC);
1757                         kfree(volume_info.password);
1758                         kfree(volume_info.prepath);
1759                         FreeXid(xid);
1760                         return rc;
1761                 } else {
1762                         memset(srvTcp, 0, sizeof (struct TCP_Server_Info));
1763                         memcpy(&srvTcp->addr.sockAddr, &sin_server, sizeof (struct sockaddr_in));
1764                         atomic_set(&srvTcp->inFlight,0);
1765                         /* BB Add code for ipv6 case too */
1766                         srvTcp->ssocket = csocket;
1767                         srvTcp->protocolType = IPV4;
1768                         init_waitqueue_head(&srvTcp->response_q);
1769                         init_waitqueue_head(&srvTcp->request_q);
1770                         INIT_LIST_HEAD(&srvTcp->pending_mid_q);
1771                         /* at this point we are the only ones with the pointer
1772                         to the struct since the kernel thread not created yet
1773                         so no need to spinlock this init of tcpStatus */
1774                         srvTcp->tcpStatus = CifsNew;
1775                         init_MUTEX(&srvTcp->tcpSem);
1776                         rc = (int)kernel_thread((void *)(void *)cifs_demultiplex_thread, srvTcp,
1777                                       CLONE_FS | CLONE_FILES | CLONE_VM);
1778                         if(rc < 0) {
1779                                 rc = -ENOMEM;
1780                                 sock_release(csocket);
1781                                 kfree(volume_info.UNC);
1782                                 kfree(volume_info.password);
1783                                 kfree(volume_info.prepath);
1784                                 FreeXid(xid);
1785                                 return rc;
1786                         }
1787                         wait_for_completion(&cifsd_complete);
1788                         rc = 0;
1789                         memcpy(srvTcp->workstation_RFC1001_name, volume_info.source_rfc1001_name,16);
1790                         memcpy(srvTcp->server_RFC1001_name, volume_info.target_rfc1001_name,16);
1791                         srvTcp->sequence_number = 0;
1792                 }
1793         }
1794
1795         if (existingCifsSes) {
1796                 pSesInfo = existingCifsSes;
1797                 cFYI(1, ("Existing smb sess found"));
1798                 kfree(volume_info.password);
1799                 /* volume_info.UNC freed at end of function */
1800         } else if (!rc) {
1801                 cFYI(1, ("Existing smb sess not found"));
1802                 pSesInfo = sesInfoAlloc();
1803                 if (pSesInfo == NULL)
1804                         rc = -ENOMEM;
1805                 else {
1806                         pSesInfo->server = srvTcp;
1807                         sprintf(pSesInfo->serverName, "%u.%u.%u.%u",
1808                                 NIPQUAD(sin_server.sin_addr.s_addr));
1809                 }
1810
1811                 if (!rc){
1812                         /* volume_info.password freed at unmount */   
1813                         if (volume_info.password)
1814                                 pSesInfo->password = volume_info.password;
1815                         if (volume_info.username)
1816                                 strncpy(pSesInfo->userName,
1817                                         volume_info.username,MAX_USERNAME_SIZE);
1818                         if (volume_info.domainname) {
1819                                 int len = strlen(volume_info.domainname);
1820                                 pSesInfo->domainName = 
1821                                         kmalloc(len + 1, GFP_KERNEL);
1822                                 if(pSesInfo->domainName)
1823                                         strcpy(pSesInfo->domainName,
1824                                                 volume_info.domainname);
1825                         }
1826                         pSesInfo->linux_uid = volume_info.linux_uid;
1827                         pSesInfo->overrideSecFlg = volume_info.secFlg;
1828                         down(&pSesInfo->sesSem);
1829                         /* BB FIXME need to pass vol->secFlgs BB */
1830                         rc = cifs_setup_session(xid,pSesInfo, cifs_sb->local_nls);
1831                         up(&pSesInfo->sesSem);
1832                         if(!rc)
1833                                 atomic_inc(&srvTcp->socketUseCount);
1834                 } else
1835                         kfree(volume_info.password);
1836         }
1837     
1838         /* search for existing tcon to this server share */
1839         if (!rc) {
1840                 if(volume_info.rsize > CIFSMaxBufSize) {
1841                         cERROR(1,("rsize %d too large, using MaxBufSize",
1842                                 volume_info.rsize));
1843                         cifs_sb->rsize = CIFSMaxBufSize;
1844                 } else if((volume_info.rsize) && (volume_info.rsize <= CIFSMaxBufSize))
1845                         cifs_sb->rsize = volume_info.rsize;
1846                 else /* default */
1847                         cifs_sb->rsize = CIFSMaxBufSize;
1848
1849                 if(volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
1850                         cERROR(1,("wsize %d too large using 4096 instead",
1851                                   volume_info.wsize));
1852                         cifs_sb->wsize = 4096;
1853                 } else if(volume_info.wsize)
1854                         cifs_sb->wsize = volume_info.wsize;
1855                 else
1856                         cifs_sb->wsize = 
1857                                 min_t(const int, PAGEVEC_SIZE * PAGE_CACHE_SIZE,
1858                                         127*1024);
1859                         /* old default of CIFSMaxBufSize was too small now
1860                            that SMB Write2 can send multiple pages in kvec.   
1861                            RFC1001 does not describe what happens when frame
1862                            bigger than 128K is sent so use that as max in
1863                            conjunction with 52K kvec constraint on arch with 4K
1864                            page size  */
1865
1866                 if(cifs_sb->rsize < 2048) {
1867                         cifs_sb->rsize = 2048; 
1868                         /* Windows ME may prefer this */
1869                         cFYI(1,("readsize set to minimum 2048"));
1870                 }
1871                 /* calculate prepath */
1872                 cifs_sb->prepath = volume_info.prepath;
1873                 if(cifs_sb->prepath) {
1874                         cifs_sb->prepathlen = strlen(cifs_sb->prepath);
1875                         cifs_sb->prepath[0] = CIFS_DIR_SEP(cifs_sb);
1876                         volume_info.prepath = NULL;
1877                 } else 
1878                         cifs_sb->prepathlen = 0;
1879                 cifs_sb->mnt_uid = volume_info.linux_uid;
1880                 cifs_sb->mnt_gid = volume_info.linux_gid;
1881                 cifs_sb->mnt_file_mode = volume_info.file_mode;
1882                 cifs_sb->mnt_dir_mode = volume_info.dir_mode;
1883                 cFYI(1,("file mode: 0x%x  dir mode: 0x%x",
1884                         cifs_sb->mnt_file_mode,cifs_sb->mnt_dir_mode));
1885
1886                 if(volume_info.noperm)
1887                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
1888                 if(volume_info.setuids)
1889                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
1890                 if(volume_info.server_ino)
1891                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
1892                 if(volume_info.remap)
1893                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
1894                 if(volume_info.no_xattr)
1895                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
1896                 if(volume_info.sfu_emul)
1897                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
1898                 if(volume_info.nobrl)
1899                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
1900                 if(volume_info.cifs_acl)
1901                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
1902
1903                 if(volume_info.direct_io) {
1904                         cFYI(1,("mounting share using direct i/o"));
1905                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
1906                 }
1907
1908                 tcon =
1909                     find_unc(sin_server.sin_addr.s_addr, volume_info.UNC,
1910                              volume_info.username);
1911                 if (tcon) {
1912                         cFYI(1, ("Found match on UNC path"));
1913                         /* we can have only one retry value for a connection
1914                            to a share so for resources mounted more than once
1915                            to the same server share the last value passed in 
1916                            for the retry flag is used */
1917                         tcon->retry = volume_info.retry;
1918                         tcon->nocase = volume_info.nocase;
1919                 } else {
1920                         tcon = tconInfoAlloc();
1921                         if (tcon == NULL)
1922                                 rc = -ENOMEM;
1923                         else {
1924                                 /* check for null share name ie connect to dfs root */
1925
1926                                 /* BB check if this works for exactly length three strings */
1927                                 if ((strchr(volume_info.UNC + 3, '\\') == NULL)
1928                                     && (strchr(volume_info.UNC + 3, '/') ==
1929                                         NULL)) {
1930                                         rc = connect_to_dfs_path(xid, pSesInfo,
1931                                                         "", cifs_sb->local_nls,
1932                                                         cifs_sb->mnt_cifs_flags & 
1933                                                           CIFS_MOUNT_MAP_SPECIAL_CHR);
1934                                         kfree(volume_info.UNC);
1935                                         FreeXid(xid);
1936                                         return -ENODEV;
1937                                 } else {
1938                                         rc = CIFSTCon(xid, pSesInfo, 
1939                                                 volume_info.UNC,
1940                                                 tcon, cifs_sb->local_nls);
1941                                         cFYI(1, ("CIFS Tcon rc = %d", rc));
1942                                 }
1943                                 if (!rc) {
1944                                         atomic_inc(&pSesInfo->inUse);
1945                                         tcon->retry = volume_info.retry;
1946                                         tcon->nocase = volume_info.nocase;
1947                                 }
1948                         }
1949                 }
1950         }
1951         if(pSesInfo) {
1952                 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
1953                         sb->s_maxbytes = (u64) 1 << 63;
1954                 } else
1955                         sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
1956         }
1957
1958         sb->s_time_gran = 100;
1959
1960 /* on error free sesinfo and tcon struct if needed */
1961         if (rc) {
1962                 /* if session setup failed, use count is zero but
1963                 we still need to free cifsd thread */
1964                 if(atomic_read(&srvTcp->socketUseCount) == 0) {
1965                         spin_lock(&GlobalMid_Lock);
1966                         srvTcp->tcpStatus = CifsExiting;
1967                         spin_unlock(&GlobalMid_Lock);
1968                         if(srvTcp->tsk) {
1969                                 send_sig(SIGKILL,srvTcp->tsk,1);
1970                                 wait_for_completion(&cifsd_complete);
1971                         }
1972                 }
1973                  /* If find_unc succeeded then rc == 0 so we can not end */
1974                 if (tcon)  /* up accidently freeing someone elses tcon struct */
1975                         tconInfoFree(tcon);
1976                 if (existingCifsSes == NULL) {
1977                         if (pSesInfo) {
1978                                 if ((pSesInfo->server) && 
1979                                     (pSesInfo->status == CifsGood)) {
1980                                         int temp_rc;
1981                                         temp_rc = CIFSSMBLogoff(xid, pSesInfo);
1982                                         /* if the socketUseCount is now zero */
1983                                         if((temp_rc == -ESHUTDOWN) &&
1984                                            (pSesInfo->server->tsk)) {
1985                                                 send_sig(SIGKILL,pSesInfo->server->tsk,1);
1986                                                 wait_for_completion(&cifsd_complete);
1987                                         }
1988                                 } else
1989                                         cFYI(1, ("No session or bad tcon"));
1990                                 sesInfoFree(pSesInfo);
1991                                 /* pSesInfo = NULL; */
1992                         }
1993                 }
1994         } else {
1995                 atomic_inc(&tcon->useCount);
1996                 cifs_sb->tcon = tcon;
1997                 tcon->ses = pSesInfo;
1998
1999                 /* do not care if following two calls succeed - informational */
2000                 CIFSSMBQFSDeviceInfo(xid, tcon);
2001                 CIFSSMBQFSAttributeInfo(xid, tcon);
2002
2003                 if (tcon->ses->capabilities & CAP_UNIX) {
2004                         if(!CIFSSMBQFSUnixInfo(xid, tcon)) {
2005                                 __u64 cap = 
2006                                        le64_to_cpu(tcon->fsUnixInfo.Capability);
2007                                 cap &= CIFS_UNIX_CAP_MASK;
2008                                 if(volume_info.no_psx_acl)
2009                                         cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
2010                                 else if(CIFS_UNIX_POSIX_ACL_CAP & cap) {
2011                                         cFYI(1,("negotiated posix acl support"));
2012                                         sb->s_flags |= MS_POSIXACL;
2013                                 }
2014
2015                                 if(volume_info.posix_paths == 0)
2016                                         cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2017                                 else if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
2018                                         cFYI(1,("negotiate posix pathnames"));
2019                                         cifs_sb->mnt_cifs_flags |= 
2020                                                 CIFS_MOUNT_POSIX_PATHS;
2021                                 }
2022                                         
2023                                 cFYI(1,("Negotiate caps 0x%x",(int)cap));
2024 #ifdef CONFIG_CIFS_DEBUG2
2025                                 if(cap & CIFS_UNIX_FCNTL_CAP)
2026                                         cFYI(1,("FCNTL cap"));
2027                                 if(cap & CIFS_UNIX_EXTATTR_CAP)
2028                                         cFYI(1,("EXTATTR cap"));
2029                                 if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2030                                         cFYI(1,("POSIX path cap"));
2031                                 if(cap & CIFS_UNIX_XATTR_CAP)
2032                                         cFYI(1,("XATTR cap"));
2033                                 if(cap & CIFS_UNIX_POSIX_ACL_CAP)
2034                                         cFYI(1,("POSIX ACL cap"));
2035 #endif /* CIFS_DEBUG2 */
2036                                 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
2037                                         cFYI(1,("setting capabilities failed"));
2038                                 }
2039                         }
2040                 }
2041                 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2042                         cifs_sb->wsize = min(cifs_sb->wsize,
2043                                              (tcon->ses->server->maxBuf -
2044                                               MAX_CIFS_HDR_SIZE));
2045                 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2046                         cifs_sb->rsize = min(cifs_sb->rsize,
2047                                              (tcon->ses->server->maxBuf -
2048                                               MAX_CIFS_HDR_SIZE));
2049         }
2050
2051         /* volume_info.password is freed above when existing session found
2052         (in which case it is not needed anymore) but when new sesion is created
2053         the password ptr is put in the new session structure (in which case the
2054         password will be freed at unmount time) */
2055         kfree(volume_info.UNC);
2056         kfree(volume_info.prepath);
2057         FreeXid(xid);
2058         return rc;
2059 }
2060
2061 static int
2062 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2063               char session_key[CIFS_SESS_KEY_SIZE],
2064               const struct nls_table *nls_codepage)
2065 {
2066         struct smb_hdr *smb_buffer;
2067         struct smb_hdr *smb_buffer_response;
2068         SESSION_SETUP_ANDX *pSMB;
2069         SESSION_SETUP_ANDX *pSMBr;
2070         char *bcc_ptr;
2071         char *user;
2072         char *domain;
2073         int rc = 0;
2074         int remaining_words = 0;
2075         int bytes_returned = 0;
2076         int len;
2077         __u32 capabilities;
2078         __u16 count;
2079
2080         cFYI(1, ("In sesssetup"));
2081         if(ses == NULL)
2082                 return -EINVAL;
2083         user = ses->userName;
2084         domain = ses->domainName;
2085         smb_buffer = cifs_buf_get();
2086         if (smb_buffer == NULL) {
2087                 return -ENOMEM;
2088         }
2089         smb_buffer_response = smb_buffer;
2090         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2091
2092         /* send SMBsessionSetup here */
2093         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2094                         NULL /* no tCon exists yet */ , 13 /* wct */ );
2095
2096         smb_buffer->Mid = GetNextMid(ses->server);
2097         pSMB->req_no_secext.AndXCommand = 0xFF;
2098         pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2099         pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2100
2101         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2102                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2103
2104         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2105                 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2106         if (ses->capabilities & CAP_UNICODE) {
2107                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2108                 capabilities |= CAP_UNICODE;
2109         }
2110         if (ses->capabilities & CAP_STATUS32) {
2111                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2112                 capabilities |= CAP_STATUS32;
2113         }
2114         if (ses->capabilities & CAP_DFS) {
2115                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2116                 capabilities |= CAP_DFS;
2117         }
2118         pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2119
2120         pSMB->req_no_secext.CaseInsensitivePasswordLength = 
2121                 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2122
2123         pSMB->req_no_secext.CaseSensitivePasswordLength =
2124             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2125         bcc_ptr = pByteArea(smb_buffer);
2126         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2127         bcc_ptr += CIFS_SESS_KEY_SIZE;
2128         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2129         bcc_ptr += CIFS_SESS_KEY_SIZE;
2130
2131         if (ses->capabilities & CAP_UNICODE) {
2132                 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2133                         *bcc_ptr = 0;
2134                         bcc_ptr++;
2135                 }
2136                 if(user == NULL)
2137                         bytes_returned = 0; /* skip null user */
2138                 else
2139                         bytes_returned =
2140                                 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2141                                         nls_codepage);
2142                 /* convert number of 16 bit words to bytes */
2143                 bcc_ptr += 2 * bytes_returned;
2144                 bcc_ptr += 2;   /* trailing null */
2145                 if (domain == NULL)
2146                         bytes_returned =
2147                             cifs_strtoUCS((__le16 *) bcc_ptr,
2148                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2149                 else
2150                         bytes_returned =
2151                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2152                                           nls_codepage);
2153                 bcc_ptr += 2 * bytes_returned;
2154                 bcc_ptr += 2;
2155                 bytes_returned =
2156                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2157                                   32, nls_codepage);
2158                 bcc_ptr += 2 * bytes_returned;
2159                 bytes_returned =
2160                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release,
2161                                   32, nls_codepage);
2162                 bcc_ptr += 2 * bytes_returned;
2163                 bcc_ptr += 2;
2164                 bytes_returned =
2165                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2166                                   64, nls_codepage);
2167                 bcc_ptr += 2 * bytes_returned;
2168                 bcc_ptr += 2;
2169         } else {
2170                 if(user != NULL) {                
2171                     strncpy(bcc_ptr, user, 200);
2172                     bcc_ptr += strnlen(user, 200);
2173                 }
2174                 *bcc_ptr = 0;
2175                 bcc_ptr++;
2176                 if (domain == NULL) {
2177                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2178                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2179                 } else {
2180                         strncpy(bcc_ptr, domain, 64);
2181                         bcc_ptr += strnlen(domain, 64);
2182                         *bcc_ptr = 0;
2183                         bcc_ptr++;
2184                 }
2185                 strcpy(bcc_ptr, "Linux version ");
2186                 bcc_ptr += strlen("Linux version ");
2187                 strcpy(bcc_ptr, system_utsname.release);
2188                 bcc_ptr += strlen(system_utsname.release) + 1;
2189                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2190                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2191         }
2192         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2193         smb_buffer->smb_buf_length += count;
2194         pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2195
2196         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2197                          &bytes_returned, 1);
2198         if (rc) {
2199 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2200         } else if ((smb_buffer_response->WordCount == 3)
2201                    || (smb_buffer_response->WordCount == 4)) {
2202                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2203                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2204                 if (action & GUEST_LOGIN)
2205                         cFYI(1, (" Guest login"));      /* do we want to mark SesInfo struct ? */
2206                 ses->Suid = smb_buffer_response->Uid;   /* UID left in wire format (le) */
2207                 cFYI(1, ("UID = %d ", ses->Suid));
2208          /* response can have either 3 or 4 word count - Samba sends 3 */
2209                 bcc_ptr = pByteArea(smb_buffer_response);       
2210                 if ((pSMBr->resp.hdr.WordCount == 3)
2211                     || ((pSMBr->resp.hdr.WordCount == 4)
2212                         && (blob_len < pSMBr->resp.ByteCount))) {
2213                         if (pSMBr->resp.hdr.WordCount == 4)
2214                                 bcc_ptr += blob_len;
2215
2216                         if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2217                                 if ((long) (bcc_ptr) % 2) {
2218                                         remaining_words =
2219                                             (BCC(smb_buffer_response) - 1) /2;
2220                                         bcc_ptr++;      /* Unicode strings must be word aligned */
2221                                 } else {
2222                                         remaining_words =
2223                                                 BCC(smb_buffer_response) / 2;
2224                                 }
2225                                 len =
2226                                     UniStrnlen((wchar_t *) bcc_ptr,
2227                                                remaining_words - 1);
2228 /* We look for obvious messed up bcc or strings in response so we do not go off
2229    the end since (at least) WIN2K and Windows XP have a major bug in not null
2230    terminating last Unicode string in response  */
2231                                 if(ses->serverOS)
2232                                         kfree(ses->serverOS);
2233                                 ses->serverOS = kzalloc(2 * (len + 1), GFP_KERNEL);
2234                                 if(ses->serverOS == NULL)
2235                                         goto sesssetup_nomem;
2236                                 cifs_strfromUCS_le(ses->serverOS,
2237                                            (__le16 *)bcc_ptr, len,nls_codepage);
2238                                 bcc_ptr += 2 * (len + 1);
2239                                 remaining_words -= len + 1;
2240                                 ses->serverOS[2 * len] = 0;
2241                                 ses->serverOS[1 + (2 * len)] = 0;
2242                                 if (remaining_words > 0) {
2243                                         len = UniStrnlen((wchar_t *)bcc_ptr,
2244                                                          remaining_words-1);
2245                                         kfree(ses->serverNOS);
2246                                         ses->serverNOS = kzalloc(2 * (len + 1),GFP_KERNEL);
2247                                         if(ses->serverNOS == NULL)
2248                                                 goto sesssetup_nomem;
2249                                         cifs_strfromUCS_le(ses->serverNOS,
2250                                                            (__le16 *)bcc_ptr,len,nls_codepage);
2251                                         bcc_ptr += 2 * (len + 1);
2252                                         ses->serverNOS[2 * len] = 0;
2253                                         ses->serverNOS[1 + (2 * len)] = 0;
2254                                         if(strncmp(ses->serverNOS,
2255                                                 "NT LAN Manager 4",16) == 0) {
2256                                                 cFYI(1,("NT4 server"));
2257                                                 ses->flags |= CIFS_SES_NT4;
2258                                         }
2259                                         remaining_words -= len + 1;
2260                                         if (remaining_words > 0) {
2261                                                 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2262           /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2263                                                 if(ses->serverDomain)
2264                                                         kfree(ses->serverDomain);
2265                                                 ses->serverDomain =
2266                                                     kzalloc(2*(len+1),GFP_KERNEL);
2267                                                 if(ses->serverDomain == NULL)
2268                                                         goto sesssetup_nomem;
2269                                                 cifs_strfromUCS_le(ses->serverDomain,
2270                                                      (__le16 *)bcc_ptr,len,nls_codepage);
2271                                                 bcc_ptr += 2 * (len + 1);
2272                                                 ses->serverDomain[2*len] = 0;
2273                                                 ses->serverDomain[1+(2*len)] = 0;
2274                                         } /* else no more room so create dummy domain string */
2275                                         else {
2276                                                 if(ses->serverDomain)
2277                                                         kfree(ses->serverDomain);
2278                                                 ses->serverDomain = 
2279                                                         kzalloc(2, GFP_KERNEL);
2280                                         }
2281                                 } else {        /* no room so create dummy domain and NOS string */
2282                                         /* if these kcallocs fail not much we
2283                                            can do, but better to not fail the
2284                                            sesssetup itself */
2285                                         kfree(ses->serverDomain);
2286                                         ses->serverDomain =
2287                                             kzalloc(2, GFP_KERNEL);
2288                                         kfree(ses->serverNOS);
2289                                         ses->serverNOS =
2290                                             kzalloc(2, GFP_KERNEL);
2291                                 }
2292                         } else {        /* ASCII */
2293                                 len = strnlen(bcc_ptr, 1024);
2294                                 if (((long) bcc_ptr + len) - (long)
2295                                     pByteArea(smb_buffer_response)
2296                                             <= BCC(smb_buffer_response)) {
2297                                         kfree(ses->serverOS);
2298                                         ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
2299                                         if(ses->serverOS == NULL)
2300                                                 goto sesssetup_nomem;
2301                                         strncpy(ses->serverOS,bcc_ptr, len);
2302
2303                                         bcc_ptr += len;
2304                                         bcc_ptr[0] = 0; /* null terminate the string */
2305                                         bcc_ptr++;
2306
2307                                         len = strnlen(bcc_ptr, 1024);
2308                                         kfree(ses->serverNOS);
2309                                         ses->serverNOS = kzalloc(len + 1,GFP_KERNEL);
2310                                         if(ses->serverNOS == NULL)
2311                                                 goto sesssetup_nomem;
2312                                         strncpy(ses->serverNOS, bcc_ptr, len);
2313                                         bcc_ptr += len;
2314                                         bcc_ptr[0] = 0;
2315                                         bcc_ptr++;
2316
2317                                         len = strnlen(bcc_ptr, 1024);
2318                                         if(ses->serverDomain)
2319                                                 kfree(ses->serverDomain);
2320                                         ses->serverDomain = kzalloc(len + 1,GFP_KERNEL);
2321                                         if(ses->serverDomain == NULL)
2322                                                 goto sesssetup_nomem;
2323                                         strncpy(ses->serverDomain, bcc_ptr, len);
2324                                         bcc_ptr += len;
2325                                         bcc_ptr[0] = 0;
2326                                         bcc_ptr++;
2327                                 } else
2328                                         cFYI(1,
2329                                              ("Variable field of length %d extends beyond end of smb ",
2330                                               len));
2331                         }
2332                 } else {
2333                         cERROR(1,
2334                                (" Security Blob Length extends beyond end of SMB"));
2335                 }
2336         } else {
2337                 cERROR(1,
2338                        (" Invalid Word count %d: ",
2339                         smb_buffer_response->WordCount));
2340                 rc = -EIO;
2341         }
2342 sesssetup_nomem:        /* do not return an error on nomem for the info strings,
2343                            since that could make reconnection harder, and
2344                            reconnection might be needed to free memory */
2345         if (smb_buffer)
2346                 cifs_buf_release(smb_buffer);
2347
2348         return rc;
2349 }
2350
2351 static int
2352 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2353                               struct cifsSesInfo *ses, int * pNTLMv2_flag,
2354                               const struct nls_table *nls_codepage)
2355 {
2356         struct smb_hdr *smb_buffer;
2357         struct smb_hdr *smb_buffer_response;
2358         SESSION_SETUP_ANDX *pSMB;
2359         SESSION_SETUP_ANDX *pSMBr;
2360         char *bcc_ptr;
2361         char *domain;
2362         int rc = 0;
2363         int remaining_words = 0;
2364         int bytes_returned = 0;
2365         int len;
2366         int SecurityBlobLength = sizeof (NEGOTIATE_MESSAGE);
2367         PNEGOTIATE_MESSAGE SecurityBlob;
2368         PCHALLENGE_MESSAGE SecurityBlob2;
2369         __u32 negotiate_flags, capabilities;
2370         __u16 count;
2371
2372         cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
2373         if(ses == NULL)
2374                 return -EINVAL;
2375         domain = ses->domainName;
2376         *pNTLMv2_flag = FALSE;
2377         smb_buffer = cifs_buf_get();
2378         if (smb_buffer == NULL) {
2379                 return -ENOMEM;
2380         }
2381         smb_buffer_response = smb_buffer;
2382         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2383         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2384
2385         /* send SMBsessionSetup here */
2386         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2387                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2388
2389         smb_buffer->Mid = GetNextMid(ses->server);
2390         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2391         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2392
2393         pSMB->req.AndXCommand = 0xFF;
2394         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2395         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2396
2397         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2398                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2399
2400         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2401             CAP_EXTENDED_SECURITY;
2402         if (ses->capabilities & CAP_UNICODE) {
2403                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2404                 capabilities |= CAP_UNICODE;
2405         }
2406         if (ses->capabilities & CAP_STATUS32) {
2407                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2408                 capabilities |= CAP_STATUS32;
2409         }
2410         if (ses->capabilities & CAP_DFS) {
2411                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2412                 capabilities |= CAP_DFS;
2413         }
2414         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2415
2416         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2417         SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2418         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2419         SecurityBlob->MessageType = NtLmNegotiate;
2420         negotiate_flags =
2421             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2422             NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
2423             NTLMSSP_NEGOTIATE_56 |
2424             /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2425         if(sign_CIFS_PDUs)
2426                 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2427 /*      if(ntlmv2_support)
2428                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;*/
2429         /* setup pointers to domain name and workstation name */
2430         bcc_ptr += SecurityBlobLength;
2431
2432         SecurityBlob->WorkstationName.Buffer = 0;
2433         SecurityBlob->WorkstationName.Length = 0;
2434         SecurityBlob->WorkstationName.MaximumLength = 0;
2435
2436         /* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
2437         along with username on auth request (ie the response to challenge) */
2438         SecurityBlob->DomainName.Buffer = 0;
2439         SecurityBlob->DomainName.Length = 0;
2440         SecurityBlob->DomainName.MaximumLength = 0;
2441         if (ses->capabilities & CAP_UNICODE) {
2442                 if ((long) bcc_ptr % 2) {
2443                         *bcc_ptr = 0;
2444                         bcc_ptr++;
2445                 }
2446
2447                 bytes_returned =
2448                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2449                                   32, nls_codepage);
2450                 bcc_ptr += 2 * bytes_returned;
2451                 bytes_returned =
2452                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release, 32,
2453                                   nls_codepage);
2454                 bcc_ptr += 2 * bytes_returned;
2455                 bcc_ptr += 2;   /* null terminate Linux version */
2456                 bytes_returned =
2457                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2458                                   64, nls_codepage);
2459                 bcc_ptr += 2 * bytes_returned;
2460                 *(bcc_ptr + 1) = 0;
2461                 *(bcc_ptr + 2) = 0;
2462                 bcc_ptr += 2;   /* null terminate network opsys string */
2463                 *(bcc_ptr + 1) = 0;
2464                 *(bcc_ptr + 2) = 0;
2465                 bcc_ptr += 2;   /* null domain */
2466         } else {                /* ASCII */
2467                 strcpy(bcc_ptr, "Linux version ");
2468                 bcc_ptr += strlen("Linux version ");
2469                 strcpy(bcc_ptr, system_utsname.release);
2470                 bcc_ptr += strlen(system_utsname.release) + 1;
2471                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2472                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2473                 bcc_ptr++;      /* empty domain field */
2474                 *bcc_ptr = 0;
2475         }
2476         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2477         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2478         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2479         smb_buffer->smb_buf_length += count;
2480         pSMB->req.ByteCount = cpu_to_le16(count);
2481
2482         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2483                          &bytes_returned, 1);
2484
2485         if (smb_buffer_response->Status.CifsError ==
2486             cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
2487                 rc = 0;
2488
2489         if (rc) {
2490 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2491         } else if ((smb_buffer_response->WordCount == 3)
2492                    || (smb_buffer_response->WordCount == 4)) {
2493                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2494                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2495
2496                 if (action & GUEST_LOGIN)
2497                         cFYI(1, (" Guest login"));      
2498         /* Do we want to set anything in SesInfo struct when guest login? */
2499
2500                 bcc_ptr = pByteArea(smb_buffer_response);       
2501         /* response can have either 3 or 4 word count - Samba sends 3 */
2502
2503                 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
2504                 if (SecurityBlob2->MessageType != NtLmChallenge) {
2505                         cFYI(1,
2506                              ("Unexpected NTLMSSP message type received %d",
2507                               SecurityBlob2->MessageType));
2508                 } else if (ses) {
2509                         ses->Suid = smb_buffer_response->Uid; /* UID left in le format */ 
2510                         cFYI(1, ("UID = %d", ses->Suid));
2511                         if ((pSMBr->resp.hdr.WordCount == 3)
2512                             || ((pSMBr->resp.hdr.WordCount == 4)
2513                                 && (blob_len <
2514                                     pSMBr->resp.ByteCount))) {
2515
2516                                 if (pSMBr->resp.hdr.WordCount == 4) {
2517                                         bcc_ptr += blob_len;
2518                                         cFYI(1, ("Security Blob Length %d",
2519                                               blob_len));
2520                                 }
2521
2522                                 cFYI(1, ("NTLMSSP Challenge rcvd"));
2523
2524                                 memcpy(ses->server->cryptKey,
2525                                        SecurityBlob2->Challenge,
2526                                        CIFS_CRYPTO_KEY_SIZE);
2527                                 if(SecurityBlob2->NegotiateFlags & 
2528                                         cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
2529                                         *pNTLMv2_flag = TRUE;
2530
2531                                 if((SecurityBlob2->NegotiateFlags & 
2532                                         cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN)) 
2533                                         || (sign_CIFS_PDUs > 1))
2534                                                 ses->server->secMode |= 
2535                                                         SECMODE_SIGN_REQUIRED;  
2536                                 if ((SecurityBlob2->NegotiateFlags & 
2537                                         cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
2538                                                 ses->server->secMode |= 
2539                                                         SECMODE_SIGN_ENABLED;
2540
2541                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2542                                         if ((long) (bcc_ptr) % 2) {
2543                                                 remaining_words =
2544                                                     (BCC(smb_buffer_response)
2545                                                      - 1) / 2;
2546                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
2547                                         } else {
2548                                                 remaining_words =
2549                                                     BCC
2550                                                     (smb_buffer_response) / 2;
2551                                         }
2552                                         len =
2553                                             UniStrnlen((wchar_t *) bcc_ptr,
2554                                                        remaining_words - 1);
2555 /* We look for obvious messed up bcc or strings in response so we do not go off
2556    the end since (at least) WIN2K and Windows XP have a major bug in not null
2557    terminating last Unicode string in response  */
2558                                         if(ses->serverOS)
2559                                                 kfree(ses->serverOS);
2560                                         ses->serverOS =
2561                                             kzalloc(2 * (len + 1), GFP_KERNEL);
2562                                         cifs_strfromUCS_le(ses->serverOS,
2563                                                            (__le16 *)
2564                                                            bcc_ptr, len,
2565                                                            nls_codepage);
2566                                         bcc_ptr += 2 * (len + 1);
2567                                         remaining_words -= len + 1;
2568                                         ses->serverOS[2 * len] = 0;
2569                                         ses->serverOS[1 + (2 * len)] = 0;
2570                                         if (remaining_words > 0) {
2571                                                 len = UniStrnlen((wchar_t *)
2572                                                                  bcc_ptr,
2573                                                                  remaining_words
2574                                                                  - 1);
2575                                                 kfree(ses->serverNOS);
2576                                                 ses->serverNOS =
2577                                                     kzalloc(2 * (len + 1),
2578                                                             GFP_KERNEL);
2579                                                 cifs_strfromUCS_le(ses->
2580                                                                    serverNOS,
2581                                                                    (__le16 *)
2582                                                                    bcc_ptr,
2583                                                                    len,
2584                                                                    nls_codepage);
2585                                                 bcc_ptr += 2 * (len + 1);
2586                                                 ses->serverNOS[2 * len] = 0;
2587                                                 ses->serverNOS[1 +
2588                                                                (2 * len)] = 0;
2589                                                 remaining_words -= len + 1;
2590                                                 if (remaining_words > 0) {
2591                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words); 
2592            /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2593                                                         kfree(ses->serverDomain);
2594                                                         ses->serverDomain =
2595                                                             kzalloc(2 *
2596                                                                     (len +
2597                                                                      1),
2598                                                                     GFP_KERNEL);
2599                                                         cifs_strfromUCS_le
2600                                                             (ses->serverDomain,
2601                                                              (__le16 *)bcc_ptr,
2602                                                              len, nls_codepage);
2603                                                         bcc_ptr +=
2604                                                             2 * (len + 1);
2605                                                         ses->serverDomain[2*len]
2606                                                             = 0;
2607                                                         ses->serverDomain
2608                                                                 [1 + (2 * len)]
2609                                                             = 0;
2610                                                 } /* else no more room so create dummy domain string */
2611                                                 else {
2612                                                         kfree(ses->serverDomain);
2613                                                         ses->serverDomain =
2614                                                             kzalloc(2,
2615                                                                     GFP_KERNEL);
2616                                                 }
2617                                         } else {        /* no room so create dummy domain and NOS string */
2618                                                 kfree(ses->serverDomain);
2619                                                 ses->serverDomain =
2620                                                     kzalloc(2, GFP_KERNEL);
2621                                                 kfree(ses->serverNOS);
2622                                                 ses->serverNOS =
2623                                                     kzalloc(2, GFP_KERNEL);
2624                                         }
2625                                 } else {        /* ASCII */
2626                                         len = strnlen(bcc_ptr, 1024);
2627                                         if (((long) bcc_ptr + len) - (long)
2628                                             pByteArea(smb_buffer_response)
2629                                             <= BCC(smb_buffer_response)) {
2630                                                 if(ses->serverOS)
2631                                                         kfree(ses->serverOS);
2632                                                 ses->serverOS =
2633                                                     kzalloc(len + 1,
2634                                                             GFP_KERNEL);
2635                                                 strncpy(ses->serverOS,
2636                                                         bcc_ptr, len);
2637
2638                                                 bcc_ptr += len;
2639                                                 bcc_ptr[0] = 0; /* null terminate string */
2640                                                 bcc_ptr++;
2641
2642                                                 len = strnlen(bcc_ptr, 1024);
2643                                                 kfree(ses->serverNOS);
2644                                                 ses->serverNOS =
2645                                                     kzalloc(len + 1,
2646                                                             GFP_KERNEL);
2647                                                 strncpy(ses->serverNOS, bcc_ptr, len);
2648                                                 bcc_ptr += len;
2649                                                 bcc_ptr[0] = 0;
2650                                                 bcc_ptr++;
2651
2652                                                 len = strnlen(bcc_ptr, 1024);
2653                                                 kfree(ses->serverDomain);
2654                                                 ses->serverDomain =
2655                                                     kzalloc(len + 1,
2656                                                             GFP_KERNEL);
2657                                                 st