]> nv-tegra.nvidia Code Review - linux-2.6.git/blob - fs/cifs/connect.c
[CIFS] DFS build fixes
[linux-2.6.git] / fs / cifs / connect.c
1 /*
2  *   fs/cifs/connect.c
3  *
4  *   Copyright (C) International Business Machines  Corp., 2002,2008
5  *   Author(s): Steve French (sfrench@us.ibm.com)
6  *
7  *   This library is free software; you can redistribute it and/or modify
8  *   it under the terms of the GNU Lesser General Public License as published
9  *   by the Free Software Foundation; either version 2.1 of the License, or
10  *   (at your option) any later version.
11  *
12  *   This library is distributed in the hope that it will be useful,
13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
15  *   the GNU Lesser General Public License for more details.
16  *
17  *   You should have received a copy of the GNU Lesser General Public License
18  *   along with this library; if not, write to the Free Software
19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20  */
21 #include <linux/fs.h>
22 #include <linux/net.h>
23 #include <linux/string.h>
24 #include <linux/list.h>
25 #include <linux/wait.h>
26 #include <linux/ipv6.h>
27 #include <linux/pagemap.h>
28 #include <linux/ctype.h>
29 #include <linux/utsname.h>
30 #include <linux/mempool.h>
31 #include <linux/delay.h>
32 #include <linux/completion.h>
33 #include <linux/kthread.h>
34 #include <linux/pagevec.h>
35 #include <linux/freezer.h>
36 #include <asm/uaccess.h>
37 #include <asm/processor.h>
38 #include "cifspdu.h"
39 #include "cifsglob.h"
40 #include "cifsproto.h"
41 #include "cifs_unicode.h"
42 #include "cifs_debug.h"
43 #include "cifs_fs_sb.h"
44 #include "ntlmssp.h"
45 #include "nterr.h"
46 #include "rfc1002pdu.h"
47 #include "cn_cifs.h"
48
49 #define CIFS_PORT 445
50 #define RFC1001_PORT 139
51
52 static DECLARE_COMPLETION(cifsd_complete);
53
54 extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
55                          unsigned char *p24);
56
57 extern mempool_t *cifs_req_poolp;
58
59 struct smb_vol {
60         char *username;
61         char *password;
62         char *domainname;
63         char *UNC;
64         char *UNCip;
65         char *in6_addr;  /* ipv6 address as human readable form of in6_addr */
66         char *iocharset;  /* local code page for mapping to and from Unicode */
67         char source_rfc1001_name[16]; /* netbios name of client */
68         char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
69         uid_t linux_uid;
70         gid_t linux_gid;
71         mode_t file_mode;
72         mode_t dir_mode;
73         unsigned secFlg;
74         unsigned rw:1;
75         unsigned retry:1;
76         unsigned intr:1;
77         unsigned setuids:1;
78         unsigned override_uid:1;
79         unsigned override_gid:1;
80         unsigned noperm:1;
81         unsigned no_psx_acl:1; /* set if posix acl support should be disabled */
82         unsigned cifs_acl:1;
83         unsigned no_xattr:1;   /* set if xattr (EA) support should be disabled*/
84         unsigned server_ino:1; /* use inode numbers from server ie UniqueId */
85         unsigned direct_io:1;
86         unsigned remap:1;   /* set to remap seven reserved chars in filenames */
87         unsigned posix_paths:1;   /* unset to not ask for posix pathnames. */
88         unsigned no_linux_ext:1;
89         unsigned sfu_emul:1;
90         unsigned nullauth:1; /* attempt to authenticate with null user */
91         unsigned nocase;     /* request case insensitive filenames */
92         unsigned nobrl;      /* disable sending byte range locks to srv */
93         unsigned int rsize;
94         unsigned int wsize;
95         unsigned int sockopt;
96         unsigned short int port;
97         char *prepath;
98 };
99
100 static int ipv4_connect(struct sockaddr_in *psin_server,
101                         struct socket **csocket,
102                         char *netb_name,
103                         char *server_netb_name);
104 static int ipv6_connect(struct sockaddr_in6 *psin_server,
105                         struct socket **csocket);
106
107
108         /*
109          * cifs tcp session reconnection
110          *
111          * mark tcp session as reconnecting so temporarily locked
112          * mark all smb sessions as reconnecting for tcp session
113          * reconnect tcp session
114          * wake up waiters on reconnection? - (not needed currently)
115          */
116
117 static int
118 cifs_reconnect(struct TCP_Server_Info *server)
119 {
120         int rc = 0;
121         struct list_head *tmp;
122         struct cifsSesInfo *ses;
123         struct cifsTconInfo *tcon;
124         struct mid_q_entry *mid_entry;
125
126         spin_lock(&GlobalMid_Lock);
127         if (kthread_should_stop()) {
128                 /* the demux thread will exit normally
129                 next time through the loop */
130                 spin_unlock(&GlobalMid_Lock);
131                 return rc;
132         } else
133                 server->tcpStatus = CifsNeedReconnect;
134         spin_unlock(&GlobalMid_Lock);
135         server->maxBuf = 0;
136
137         cFYI(1, ("Reconnecting tcp session"));
138
139         /* before reconnecting the tcp session, mark the smb session (uid)
140                 and the tid bad so they are not used until reconnected */
141         read_lock(&GlobalSMBSeslock);
142         list_for_each(tmp, &GlobalSMBSessionList) {
143                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
144                 if (ses->server) {
145                         if (ses->server == server) {
146                                 ses->status = CifsNeedReconnect;
147                                 ses->ipc_tid = 0;
148                         }
149                 }
150                 /* else tcp and smb sessions need reconnection */
151         }
152         list_for_each(tmp, &GlobalTreeConnectionList) {
153                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
154                 if ((tcon) && (tcon->ses) && (tcon->ses->server == server))
155                         tcon->tidStatus = CifsNeedReconnect;
156         }
157         read_unlock(&GlobalSMBSeslock);
158         /* do not want to be sending data on a socket we are freeing */
159         down(&server->tcpSem);
160         if (server->ssocket) {
161                 cFYI(1, ("State: 0x%x Flags: 0x%lx", server->ssocket->state,
162                         server->ssocket->flags));
163                 kernel_sock_shutdown(server->ssocket, SHUT_WR);
164                 cFYI(1, ("Post shutdown state: 0x%x Flags: 0x%lx",
165                         server->ssocket->state,
166                         server->ssocket->flags));
167                 sock_release(server->ssocket);
168                 server->ssocket = NULL;
169         }
170
171         spin_lock(&GlobalMid_Lock);
172         list_for_each(tmp, &server->pending_mid_q) {
173                 mid_entry = list_entry(tmp, struct
174                                         mid_q_entry,
175                                         qhead);
176                 if (mid_entry) {
177                         if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
178                                 /* Mark other intransit requests as needing
179                                    retry so we do not immediately mark the
180                                    session bad again (ie after we reconnect
181                                    below) as they timeout too */
182                                 mid_entry->midState = MID_RETRY_NEEDED;
183                         }
184                 }
185         }
186         spin_unlock(&GlobalMid_Lock);
187         up(&server->tcpSem);
188
189         while ((!kthread_should_stop()) && (server->tcpStatus != CifsGood)) {
190                 try_to_freeze();
191                 if (server->protocolType == IPV6) {
192                         rc = ipv6_connect(&server->addr.sockAddr6,
193                                           &server->ssocket);
194                 } else {
195                         rc = ipv4_connect(&server->addr.sockAddr,
196                                         &server->ssocket,
197                                         server->workstation_RFC1001_name,
198                                         server->server_RFC1001_name);
199                 }
200                 if (rc) {
201                         cFYI(1, ("reconnect error %d", rc));
202                         msleep(3000);
203                 } else {
204                         atomic_inc(&tcpSesReconnectCount);
205                         spin_lock(&GlobalMid_Lock);
206                         if (!kthread_should_stop())
207                                 server->tcpStatus = CifsGood;
208                         server->sequence_number = 0;
209                         spin_unlock(&GlobalMid_Lock);
210         /*              atomic_set(&server->inFlight,0);*/
211                         wake_up(&server->response_q);
212                 }
213         }
214         return rc;
215 }
216
217 /*
218         return codes:
219                 0       not a transact2, or all data present
220                 >0      transact2 with that much data missing
221                 -EINVAL = invalid transact2
222
223  */
224 static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
225 {
226         struct smb_t2_rsp *pSMBt;
227         int total_data_size;
228         int data_in_this_rsp;
229         int remaining;
230
231         if (pSMB->Command != SMB_COM_TRANSACTION2)
232                 return 0;
233
234         /* check for plausible wct, bcc and t2 data and parm sizes */
235         /* check for parm and data offset going beyond end of smb */
236         if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
237                 cFYI(1, ("invalid transact2 word count"));
238                 return -EINVAL;
239         }
240
241         pSMBt = (struct smb_t2_rsp *)pSMB;
242
243         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
244         data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
245
246         remaining = total_data_size - data_in_this_rsp;
247
248         if (remaining == 0)
249                 return 0;
250         else if (remaining < 0) {
251                 cFYI(1, ("total data %d smaller than data in frame %d",
252                         total_data_size, data_in_this_rsp));
253                 return -EINVAL;
254         } else {
255                 cFYI(1, ("missing %d bytes from transact2, check next response",
256                         remaining));
257                 if (total_data_size > maxBufSize) {
258                         cERROR(1, ("TotalDataSize %d is over maximum buffer %d",
259                                 total_data_size, maxBufSize));
260                         return -EINVAL;
261                 }
262                 return remaining;
263         }
264 }
265
266 static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
267 {
268         struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
269         struct smb_t2_rsp *pSMBt  = (struct smb_t2_rsp *)pTargetSMB;
270         int total_data_size;
271         int total_in_buf;
272         int remaining;
273         int total_in_buf2;
274         char *data_area_of_target;
275         char *data_area_of_buf2;
276         __u16 byte_count;
277
278         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
279
280         if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
281                 cFYI(1, ("total data size of primary and secondary t2 differ"));
282         }
283
284         total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
285
286         remaining = total_data_size - total_in_buf;
287
288         if (remaining < 0)
289                 return -EINVAL;
290
291         if (remaining == 0) /* nothing to do, ignore */
292                 return 0;
293
294         total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
295         if (remaining < total_in_buf2) {
296                 cFYI(1, ("transact2 2nd response contains too much data"));
297         }
298
299         /* find end of first SMB data area */
300         data_area_of_target = (char *)&pSMBt->hdr.Protocol +
301                                 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
302         /* validate target area */
303
304         data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
305                                         le16_to_cpu(pSMB2->t2_rsp.DataOffset);
306
307         data_area_of_target += total_in_buf;
308
309         /* copy second buffer into end of first buffer */
310         memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2);
311         total_in_buf += total_in_buf2;
312         pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
313         byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
314         byte_count += total_in_buf2;
315         BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
316
317         byte_count = pTargetSMB->smb_buf_length;
318         byte_count += total_in_buf2;
319
320         /* BB also add check that we are not beyond maximum buffer size */
321
322         pTargetSMB->smb_buf_length = byte_count;
323
324         if (remaining == total_in_buf2) {
325                 cFYI(1, ("found the last secondary response"));
326                 return 0; /* we are done */
327         } else /* more responses to go */
328                 return 1;
329
330 }
331
332 static int
333 cifs_demultiplex_thread(struct TCP_Server_Info *server)
334 {
335         int length;
336         unsigned int pdu_length, total_read;
337         struct smb_hdr *smb_buffer = NULL;
338         struct smb_hdr *bigbuf = NULL;
339         struct smb_hdr *smallbuf = NULL;
340         struct msghdr smb_msg;
341         struct kvec iov;
342         struct socket *csocket = server->ssocket;
343         struct list_head *tmp;
344         struct cifsSesInfo *ses;
345         struct task_struct *task_to_wake = NULL;
346         struct mid_q_entry *mid_entry;
347         char temp;
348         int isLargeBuf = FALSE;
349         int isMultiRsp;
350         int reconnect;
351
352         current->flags |= PF_MEMALLOC;
353         server->tsk = current;  /* save process info to wake at shutdown */
354         cFYI(1, ("Demultiplex PID: %d", task_pid_nr(current)));
355         write_lock(&GlobalSMBSeslock);
356         atomic_inc(&tcpSesAllocCount);
357         length = tcpSesAllocCount.counter;
358         write_unlock(&GlobalSMBSeslock);
359         complete(&cifsd_complete);
360         if (length  > 1)
361                 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
362                                 GFP_KERNEL);
363
364         set_freezable();
365         while (!kthread_should_stop()) {
366                 if (try_to_freeze())
367                         continue;
368                 if (bigbuf == NULL) {
369                         bigbuf = cifs_buf_get();
370                         if (!bigbuf) {
371                                 cERROR(1, ("No memory for large SMB response"));
372                                 msleep(3000);
373                                 /* retry will check if exiting */
374                                 continue;
375                         }
376                 } else if (isLargeBuf) {
377                         /* we are reusing a dirty large buf, clear its start */
378                         memset(bigbuf, 0, sizeof(struct smb_hdr));
379                 }
380
381                 if (smallbuf == NULL) {
382                         smallbuf = cifs_small_buf_get();
383                         if (!smallbuf) {
384                                 cERROR(1, ("No memory for SMB response"));
385                                 msleep(1000);
386                                 /* retry will check if exiting */
387                                 continue;
388                         }
389                         /* beginning of smb buffer is cleared in our buf_get */
390                 } else /* if existing small buf clear beginning */
391                         memset(smallbuf, 0, sizeof(struct smb_hdr));
392
393                 isLargeBuf = FALSE;
394                 isMultiRsp = FALSE;
395                 smb_buffer = smallbuf;
396                 iov.iov_base = smb_buffer;
397                 iov.iov_len = 4;
398                 smb_msg.msg_control = NULL;
399                 smb_msg.msg_controllen = 0;
400                 pdu_length = 4; /* enough to get RFC1001 header */
401 incomplete_rcv:
402                 length =
403                     kernel_recvmsg(csocket, &smb_msg,
404                                 &iov, 1, pdu_length, 0 /* BB other flags? */);
405
406                 if (kthread_should_stop()) {
407                         break;
408                 } else if (server->tcpStatus == CifsNeedReconnect) {
409                         cFYI(1, ("Reconnect after server stopped responding"));
410                         cifs_reconnect(server);
411                         cFYI(1, ("call to reconnect done"));
412                         csocket = server->ssocket;
413                         continue;
414                 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
415                         msleep(1); /* minimum sleep to prevent looping
416                                 allowing socket to clear and app threads to set
417                                 tcpStatus CifsNeedReconnect if server hung */
418                         if (pdu_length < 4)
419                                 goto incomplete_rcv;
420                         else
421                                 continue;
422                 } else if (length <= 0) {
423                         if (server->tcpStatus == CifsNew) {
424                                 cFYI(1, ("tcp session abend after SMBnegprot"));
425                                 /* some servers kill the TCP session rather than
426                                    returning an SMB negprot error, in which
427                                    case reconnecting here is not going to help,
428                                    and so simply return error to mount */
429                                 break;
430                         }
431                         if (!try_to_freeze() && (length == -EINTR)) {
432                                 cFYI(1, ("cifsd thread killed"));
433                                 break;
434                         }
435                         cFYI(1, ("Reconnect after unexpected peek error %d",
436                                 length));
437                         cifs_reconnect(server);
438                         csocket = server->ssocket;
439                         wake_up(&server->response_q);
440                         continue;
441                 } else if (length < pdu_length) {
442                         cFYI(1, ("requested %d bytes but only got %d bytes",
443                                   pdu_length, length));
444                         pdu_length -= length;
445                         msleep(1);
446                         goto incomplete_rcv;
447                 }
448
449                 /* The right amount was read from socket - 4 bytes */
450                 /* so we can now interpret the length field */
451
452                 /* the first byte big endian of the length field,
453                 is actually not part of the length but the type
454                 with the most common, zero, as regular data */
455                 temp = *((char *) smb_buffer);
456
457                 /* Note that FC 1001 length is big endian on the wire,
458                 but we convert it here so it is always manipulated
459                 as host byte order */
460                 pdu_length = ntohl(smb_buffer->smb_buf_length);
461                 smb_buffer->smb_buf_length = pdu_length;
462
463                 cFYI(1, ("rfc1002 length 0x%x", pdu_length+4));
464
465                 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
466                         continue;
467                 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
468                         cFYI(1, ("Good RFC 1002 session rsp"));
469                         continue;
470                 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
471                         /* we get this from Windows 98 instead of
472                            an error on SMB negprot response */
473                         cFYI(1, ("Negative RFC1002 Session Response Error 0x%x)",
474                                 pdu_length));
475                         if (server->tcpStatus == CifsNew) {
476                                 /* if nack on negprot (rather than
477                                 ret of smb negprot error) reconnecting
478                                 not going to help, ret error to mount */
479                                 break;
480                         } else {
481                                 /* give server a second to
482                                 clean up before reconnect attempt */
483                                 msleep(1000);
484                                 /* always try 445 first on reconnect
485                                 since we get NACK on some if we ever
486                                 connected to port 139 (the NACK is
487                                 since we do not begin with RFC1001
488                                 session initialize frame) */
489                                 server->addr.sockAddr.sin_port =
490                                         htons(CIFS_PORT);
491                                 cifs_reconnect(server);
492                                 csocket = server->ssocket;
493                                 wake_up(&server->response_q);
494                                 continue;
495                         }
496                 } else if (temp != (char) 0) {
497                         cERROR(1, ("Unknown RFC 1002 frame"));
498                         cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
499                                       length);
500                         cifs_reconnect(server);
501                         csocket = server->ssocket;
502                         continue;
503                 }
504
505                 /* else we have an SMB response */
506                 if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
507                             (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) {
508                         cERROR(1, ("Invalid size SMB length %d pdu_length %d",
509                                         length, pdu_length+4));
510                         cifs_reconnect(server);
511                         csocket = server->ssocket;
512                         wake_up(&server->response_q);
513                         continue;
514                 }
515
516                 /* else length ok */
517                 reconnect = 0;
518
519                 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
520                         isLargeBuf = TRUE;
521                         memcpy(bigbuf, smallbuf, 4);
522                         smb_buffer = bigbuf;
523                 }
524                 length = 0;
525                 iov.iov_base = 4 + (char *)smb_buffer;
526                 iov.iov_len = pdu_length;
527                 for (total_read = 0; total_read < pdu_length;
528                      total_read += length) {
529                         length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
530                                                 pdu_length - total_read, 0);
531                         if (kthread_should_stop() ||
532                             (length == -EINTR)) {
533                                 /* then will exit */
534                                 reconnect = 2;
535                                 break;
536                         } else if (server->tcpStatus == CifsNeedReconnect) {
537                                 cifs_reconnect(server);
538                                 csocket = server->ssocket;
539                                 /* Reconnect wakes up rspns q */
540                                 /* Now we will reread sock */
541                                 reconnect = 1;
542                                 break;
543                         } else if ((length == -ERESTARTSYS) ||
544                                    (length == -EAGAIN)) {
545                                 msleep(1); /* minimum sleep to prevent looping,
546                                               allowing socket to clear and app
547                                               threads to set tcpStatus
548                                               CifsNeedReconnect if server hung*/
549                                 length = 0;
550                                 continue;
551                         } else if (length <= 0) {
552                                 cERROR(1, ("Received no data, expecting %d",
553                                               pdu_length - total_read));
554                                 cifs_reconnect(server);
555                                 csocket = server->ssocket;
556                                 reconnect = 1;
557                                 break;
558                         }
559                 }
560                 if (reconnect == 2)
561                         break;
562                 else if (reconnect == 1)
563                         continue;
564
565                 length += 4; /* account for rfc1002 hdr */
566
567
568                 dump_smb(smb_buffer, length);
569                 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
570                         cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
571                         continue;
572                 }
573
574
575                 task_to_wake = NULL;
576                 spin_lock(&GlobalMid_Lock);
577                 list_for_each(tmp, &server->pending_mid_q) {
578                         mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
579
580                         if ((mid_entry->mid == smb_buffer->Mid) &&
581                             (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
582                             (mid_entry->command == smb_buffer->Command)) {
583                                 if (check2ndT2(smb_buffer,server->maxBuf) > 0) {
584                                         /* We have a multipart transact2 resp */
585                                         isMultiRsp = TRUE;
586                                         if (mid_entry->resp_buf) {
587                                                 /* merge response - fix up 1st*/
588                                                 if (coalesce_t2(smb_buffer,
589                                                         mid_entry->resp_buf)) {
590                                                         mid_entry->multiRsp = 1;
591                                                         break;
592                                                 } else {
593                                                         /* all parts received */
594                                                         mid_entry->multiEnd = 1;
595                                                         goto multi_t2_fnd;
596                                                 }
597                                         } else {
598                                                 if (!isLargeBuf) {
599                                                         cERROR(1,("1st trans2 resp needs bigbuf"));
600                                         /* BB maybe we can fix this up,  switch
601                                            to already allocated large buffer? */
602                                                 } else {
603                                                         /* Have first buffer */
604                                                         mid_entry->resp_buf =
605                                                                  smb_buffer;
606                                                         mid_entry->largeBuf = 1;
607                                                         bigbuf = NULL;
608                                                 }
609                                         }
610                                         break;
611                                 }
612                                 mid_entry->resp_buf = smb_buffer;
613                                 if (isLargeBuf)
614                                         mid_entry->largeBuf = 1;
615                                 else
616                                         mid_entry->largeBuf = 0;
617 multi_t2_fnd:
618                                 task_to_wake = mid_entry->tsk;
619                                 mid_entry->midState = MID_RESPONSE_RECEIVED;
620 #ifdef CONFIG_CIFS_STATS2
621                                 mid_entry->when_received = jiffies;
622 #endif
623                                 /* so we do not time out requests to  server
624                                 which is still responding (since server could
625                                 be busy but not dead) */
626                                 server->lstrp = jiffies;
627                                 break;
628                         }
629                 }
630                 spin_unlock(&GlobalMid_Lock);
631                 if (task_to_wake) {
632                         /* Was previous buf put in mpx struct for multi-rsp? */
633                         if (!isMultiRsp) {
634                                 /* smb buffer will be freed by user thread */
635                                 if (isLargeBuf)
636                                         bigbuf = NULL;
637                                 else
638                                         smallbuf = NULL;
639                         }
640                         wake_up_process(task_to_wake);
641                 } else if ((is_valid_oplock_break(smb_buffer, server) == FALSE)
642                     && (isMultiRsp == FALSE)) {
643                         cERROR(1, ("No task to wake, unknown frame received! "
644                                    "NumMids %d", midCount.counter));
645                         cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
646                                       sizeof(struct smb_hdr));
647 #ifdef CONFIG_CIFS_DEBUG2
648                         cifs_dump_detail(smb_buffer);
649                         cifs_dump_mids(server);
650 #endif /* CIFS_DEBUG2 */
651
652                 }
653         } /* end while !EXITING */
654
655         spin_lock(&GlobalMid_Lock);
656         server->tcpStatus = CifsExiting;
657         server->tsk = NULL;
658         /* check if we have blocked requests that need to free */
659         /* Note that cifs_max_pending is normally 50, but
660         can be set at module install time to as little as two */
661         if (atomic_read(&server->inFlight) >= cifs_max_pending)
662                 atomic_set(&server->inFlight, cifs_max_pending - 1);
663         /* We do not want to set the max_pending too low or we
664         could end up with the counter going negative */
665         spin_unlock(&GlobalMid_Lock);
666         /* Although there should not be any requests blocked on
667         this queue it can not hurt to be paranoid and try to wake up requests
668         that may haven been blocked when more than 50 at time were on the wire
669         to the same server - they now will see the session is in exit state
670         and get out of SendReceive.  */
671         wake_up_all(&server->request_q);
672         /* give those requests time to exit */
673         msleep(125);
674
675         if (server->ssocket) {
676                 sock_release(csocket);
677                 server->ssocket = NULL;
678         }
679         /* buffer usuallly freed in free_mid - need to free it here on exit */
680         cifs_buf_release(bigbuf);
681         if (smallbuf) /* no sense logging a debug message if NULL */
682                 cifs_small_buf_release(smallbuf);
683
684         read_lock(&GlobalSMBSeslock);
685         if (list_empty(&server->pending_mid_q)) {
686                 /* loop through server session structures attached to this and
687                     mark them dead */
688                 list_for_each(tmp, &GlobalSMBSessionList) {
689                         ses =
690                             list_entry(tmp, struct cifsSesInfo,
691                                        cifsSessionList);
692                         if (ses->server == server) {
693                                 ses->status = CifsExiting;
694                                 ses->server = NULL;
695                         }
696                 }
697                 read_unlock(&GlobalSMBSeslock);
698         } else {
699                 /* although we can not zero the server struct pointer yet,
700                 since there are active requests which may depnd on them,
701                 mark the corresponding SMB sessions as exiting too */
702                 list_for_each(tmp, &GlobalSMBSessionList) {
703                         ses = list_entry(tmp, struct cifsSesInfo,
704                                          cifsSessionList);
705                         if (ses->server == server)
706                                 ses->status = CifsExiting;
707                 }
708
709                 spin_lock(&GlobalMid_Lock);
710                 list_for_each(tmp, &server->pending_mid_q) {
711                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
712                         if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
713                                 cFYI(1, ("Clearing Mid 0x%x - waking up ",
714                                          mid_entry->mid));
715                                 task_to_wake = mid_entry->tsk;
716                                 if (task_to_wake)
717                                         wake_up_process(task_to_wake);
718                         }
719                 }
720                 spin_unlock(&GlobalMid_Lock);
721                 read_unlock(&GlobalSMBSeslock);
722                 /* 1/8th of sec is more than enough time for them to exit */
723                 msleep(125);
724         }
725
726         if (!list_empty(&server->pending_mid_q)) {
727                 /* mpx threads have not exited yet give them
728                 at least the smb send timeout time for long ops */
729                 /* due to delays on oplock break requests, we need
730                 to wait at least 45 seconds before giving up
731                 on a request getting a response and going ahead
732                 and killing cifsd */
733                 cFYI(1, ("Wait for exit from demultiplex thread"));
734                 msleep(46000);
735                 /* if threads still have not exited they are probably never
736                 coming home not much else we can do but free the memory */
737         }
738
739         write_lock(&GlobalSMBSeslock);
740         atomic_dec(&tcpSesAllocCount);
741         length = tcpSesAllocCount.counter;
742
743         /* last chance to mark ses pointers invalid
744         if there are any pointing to this (e.g
745         if a crazy root user tried to kill cifsd
746         kernel thread explicitly this might happen) */
747         list_for_each(tmp, &GlobalSMBSessionList) {
748                 ses = list_entry(tmp, struct cifsSesInfo,
749                                 cifsSessionList);
750                 if (ses->server == server)
751                         ses->server = NULL;
752         }
753         write_unlock(&GlobalSMBSeslock);
754
755         kfree(server->hostname);
756         kfree(server);
757         if (length  > 0)
758                 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
759                                 GFP_KERNEL);
760
761         return 0;
762 }
763
764 /* extract the host portion of the UNC string */
765 static char *
766 extract_hostname(const char *unc)
767 {
768         const char *src;
769         char *dst, *delim;
770         unsigned int len;
771
772         /* skip double chars at beginning of string */
773         /* BB: check validity of these bytes? */
774         src = unc + 2;
775
776         /* delimiter between hostname and sharename is always '\\' now */
777         delim = strchr(src, '\\');
778         if (!delim)
779                 return ERR_PTR(-EINVAL);
780
781         len = delim - src;
782         dst = kmalloc((len + 1), GFP_KERNEL);
783         if (dst == NULL)
784                 return ERR_PTR(-ENOMEM);
785
786         memcpy(dst, src, len);
787         dst[len] = '\0';
788
789         return dst;
790 }
791
792 static int
793 cifs_parse_mount_options(char *options, const char *devname,
794                          struct smb_vol *vol)
795 {
796         char *value;
797         char *data;
798         unsigned int  temp_len, i, j;
799         char separator[2];
800
801         separator[0] = ',';
802         separator[1] = 0;
803
804         if (Local_System_Name[0] != 0)
805                 memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
806         else {
807                 char *nodename = utsname()->nodename;
808                 int n = strnlen(nodename, 15);
809                 memset(vol->source_rfc1001_name, 0x20, 15);
810                 for (i = 0; i < n; i++) {
811                         /* does not have to be perfect mapping since field is
812                         informational, only used for servers that do not support
813                         port 445 and it can be overridden at mount time */
814                         vol->source_rfc1001_name[i] = toupper(nodename[i]);
815                 }
816         }
817         vol->source_rfc1001_name[15] = 0;
818         /* null target name indicates to use *SMBSERVR default called name
819            if we end up sending RFC1001 session initialize */
820         vol->target_rfc1001_name[0] = 0;
821         vol->linux_uid = current->uid;  /* current->euid instead? */
822         vol->linux_gid = current->gid;
823         vol->dir_mode = S_IRWXUGO;
824         /* 2767 perms indicate mandatory locking support */
825         vol->file_mode = (S_IRWXUGO | S_ISGID) & (~S_IXGRP);
826
827         /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
828         vol->rw = TRUE;
829         /* default is always to request posix paths. */
830         vol->posix_paths = 1;
831
832         if (!options)
833                 return 1;
834
835         if (strncmp(options, "sep=", 4) == 0) {
836                 if (options[4] != 0) {
837                         separator[0] = options[4];
838                         options += 5;
839                 } else {
840                         cFYI(1, ("Null separator not allowed"));
841                 }
842         }
843
844         while ((data = strsep(&options, separator)) != NULL) {
845                 if (!*data)
846                         continue;
847                 if ((value = strchr(data, '=')) != NULL)
848                         *value++ = '\0';
849
850                 /* Have to parse this before we parse for "user" */
851                 if (strnicmp(data, "user_xattr", 10) == 0) {
852                         vol->no_xattr = 0;
853                 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
854                         vol->no_xattr = 1;
855                 } else if (strnicmp(data, "user", 4) == 0) {
856                         if (!value) {
857                                 printk(KERN_WARNING
858                                        "CIFS: invalid or missing username\n");
859                                 return 1;       /* needs_arg; */
860                         } else if (!*value) {
861                                 /* null user, ie anonymous, authentication */
862                                 vol->nullauth = 1;
863                         }
864                         if (strnlen(value, 200) < 200) {
865                                 vol->username = value;
866                         } else {
867                                 printk(KERN_WARNING "CIFS: username too long\n");
868                                 return 1;
869                         }
870                 } else if (strnicmp(data, "pass", 4) == 0) {
871                         if (!value) {
872                                 vol->password = NULL;
873                                 continue;
874                         } else if (value[0] == 0) {
875                                 /* check if string begins with double comma
876                                    since that would mean the password really
877                                    does start with a comma, and would not
878                                    indicate an empty string */
879                                 if (value[1] != separator[0]) {
880                                         vol->password = NULL;
881                                         continue;
882                                 }
883                         }
884                         temp_len = strlen(value);
885                         /* removed password length check, NTLM passwords
886                                 can be arbitrarily long */
887
888                         /* if comma in password, the string will be
889                         prematurely null terminated.  Commas in password are
890                         specified across the cifs mount interface by a double
891                         comma ie ,, and a comma used as in other cases ie ','
892                         as a parameter delimiter/separator is single and due
893                         to the strsep above is temporarily zeroed. */
894
895                         /* NB: password legally can have multiple commas and
896                         the only illegal character in a password is null */
897
898                         if ((value[temp_len] == 0) &&
899                             (value[temp_len+1] == separator[0])) {
900                                 /* reinsert comma */
901                                 value[temp_len] = separator[0];
902                                 temp_len += 2;  /* move after second comma */
903                                 while (value[temp_len] != 0)  {
904                                         if (value[temp_len] == separator[0]) {
905                                                 if (value[temp_len+1] ==
906                                                      separator[0]) {
907                                                 /* skip second comma */
908                                                         temp_len++;
909                                                 } else {
910                                                 /* single comma indicating start
911                                                          of next parm */
912                                                         break;
913                                                 }
914                                         }
915                                         temp_len++;
916                                 }
917                                 if (value[temp_len] == 0) {
918                                         options = NULL;
919                                 } else {
920                                         value[temp_len] = 0;
921                                         /* point option to start of next parm */
922                                         options = value + temp_len + 1;
923                                 }
924                                 /* go from value to value + temp_len condensing
925                                 double commas to singles. Note that this ends up
926                                 allocating a few bytes too many, which is ok */
927                                 vol->password = kzalloc(temp_len, GFP_KERNEL);
928                                 if (vol->password == NULL) {
929                                         printk(KERN_WARNING "CIFS: no memory "
930                                                             "for password\n");
931                                         return 1;
932                                 }
933                                 for (i = 0, j = 0; i < temp_len; i++, j++) {
934                                         vol->password[j] = value[i];
935                                         if (value[i] == separator[0]
936                                                 && value[i+1] == separator[0]) {
937                                                 /* skip second comma */
938                                                 i++;
939                                         }
940                                 }
941                                 vol->password[j] = 0;
942                         } else {
943                                 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
944                                 if (vol->password == NULL) {
945                                         printk(KERN_WARNING "CIFS: no memory "
946                                                             "for password\n");
947                                         return 1;
948                                 }
949                                 strcpy(vol->password, value);
950                         }
951                 } else if (strnicmp(data, "ip", 2) == 0) {
952                         if (!value || !*value) {
953                                 vol->UNCip = NULL;
954                         } else if (strnlen(value, 35) < 35) {
955                                 vol->UNCip = value;
956                         } else {
957                                 printk(KERN_WARNING "CIFS: ip address "
958                                                     "too long\n");
959                                 return 1;
960                         }
961                 } else if (strnicmp(data, "sec", 3) == 0) {
962                         if (!value || !*value) {
963                                 cERROR(1, ("no security value specified"));
964                                 continue;
965                         } else if (strnicmp(value, "krb5i", 5) == 0) {
966                                 vol->secFlg |= CIFSSEC_MAY_KRB5 |
967                                         CIFSSEC_MUST_SIGN;
968                         } else if (strnicmp(value, "krb5p", 5) == 0) {
969                                 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
970                                         CIFSSEC_MAY_KRB5; */
971                                 cERROR(1, ("Krb5 cifs privacy not supported"));
972                                 return 1;
973                         } else if (strnicmp(value, "krb5", 4) == 0) {
974                                 vol->secFlg |= CIFSSEC_MAY_KRB5;
975                         } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
976                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
977                                         CIFSSEC_MUST_SIGN;
978                         } else if (strnicmp(value, "ntlmv2", 6) == 0) {
979                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
980                         } else if (strnicmp(value, "ntlmi", 5) == 0) {
981                                 vol->secFlg |= CIFSSEC_MAY_NTLM |
982                                         CIFSSEC_MUST_SIGN;
983                         } else if (strnicmp(value, "ntlm", 4) == 0) {
984                                 /* ntlm is default so can be turned off too */
985                                 vol->secFlg |= CIFSSEC_MAY_NTLM;
986                         } else if (strnicmp(value, "nontlm", 6) == 0) {
987                                 /* BB is there a better way to do this? */
988                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
989 #ifdef CONFIG_CIFS_WEAK_PW_HASH
990                         } else if (strnicmp(value, "lanman", 6) == 0) {
991                                 vol->secFlg |= CIFSSEC_MAY_LANMAN;
992 #endif
993                         } else if (strnicmp(value, "none", 4) == 0) {
994                                 vol->nullauth = 1;
995                         } else {
996                                 cERROR(1, ("bad security option: %s", value));
997                                 return 1;
998                         }
999                 } else if ((strnicmp(data, "unc", 3) == 0)
1000                            || (strnicmp(data, "target", 6) == 0)
1001                            || (strnicmp(data, "path", 4) == 0)) {
1002                         if (!value || !*value) {
1003                                 printk(KERN_WARNING "CIFS: invalid path to "
1004                                                     "network resource\n");
1005                                 return 1;       /* needs_arg; */
1006                         }
1007                         if ((temp_len = strnlen(value, 300)) < 300) {
1008                                 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1009                                 if (vol->UNC == NULL)
1010                                         return 1;
1011                                 strcpy(vol->UNC, value);
1012                                 if (strncmp(vol->UNC, "//", 2) == 0) {
1013                                         vol->UNC[0] = '\\';
1014                                         vol->UNC[1] = '\\';
1015                                 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1016                                         printk(KERN_WARNING
1017                                                "CIFS: UNC Path does not begin "
1018                                                "with // or \\\\ \n");
1019                                         return 1;
1020                                 }
1021                         } else {
1022                                 printk(KERN_WARNING "CIFS: UNC name too long\n");
1023                                 return 1;
1024                         }
1025                 } else if ((strnicmp(data, "domain", 3) == 0)
1026                            || (strnicmp(data, "workgroup", 5) == 0)) {
1027                         if (!value || !*value) {
1028                                 printk(KERN_WARNING "CIFS: invalid domain name\n");
1029                                 return 1;       /* needs_arg; */
1030                         }
1031                         /* BB are there cases in which a comma can be valid in
1032                         a domain name and need special handling? */
1033                         if (strnlen(value, 256) < 256) {
1034                                 vol->domainname = value;
1035                                 cFYI(1, ("Domain name set"));
1036                         } else {
1037                                 printk(KERN_WARNING "CIFS: domain name too "
1038                                                     "long\n");
1039                                 return 1;
1040                         }
1041                 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1042                         if (!value || !*value) {
1043                                 printk(KERN_WARNING
1044                                         "CIFS: invalid path prefix\n");
1045                                 return 1;       /* needs_argument */
1046                         }
1047                         if ((temp_len = strnlen(value, 1024)) < 1024) {
1048                                 if (value[0] != '/')
1049                                         temp_len++;  /* missing leading slash */
1050                                 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1051                                 if (vol->prepath == NULL)
1052                                         return 1;
1053                                 if (value[0] != '/') {
1054                                         vol->prepath[0] = '/';
1055                                         strcpy(vol->prepath+1, value);
1056                                 } else
1057                                         strcpy(vol->prepath, value);
1058                                 cFYI(1, ("prefix path %s", vol->prepath));
1059                         } else {
1060                                 printk(KERN_WARNING "CIFS: prefix too long\n");
1061                                 return 1;
1062                         }
1063                 } else if (strnicmp(data, "iocharset", 9) == 0) {
1064                         if (!value || !*value) {
1065                                 printk(KERN_WARNING "CIFS: invalid iocharset "
1066                                                     "specified\n");
1067                                 return 1;       /* needs_arg; */
1068                         }
1069                         if (strnlen(value, 65) < 65) {
1070                                 if (strnicmp(value, "default", 7))
1071                                         vol->iocharset = value;
1072                                 /* if iocharset not set then load_nls_default
1073                                    is used by caller */
1074                                 cFYI(1, ("iocharset set to %s", value));
1075                         } else {
1076                                 printk(KERN_WARNING "CIFS: iocharset name "
1077                                                     "too long.\n");
1078                                 return 1;
1079                         }
1080                 } else if (strnicmp(data, "uid", 3) == 0) {
1081                         if (value && *value) {
1082                                 vol->linux_uid =
1083                                         simple_strtoul(value, &value, 0);
1084                                 vol->override_uid = 1;
1085                         }
1086                 } else if (strnicmp(data, "gid", 3) == 0) {
1087                         if (value && *value) {
1088                                 vol->linux_gid =
1089                                         simple_strtoul(value, &value, 0);
1090                                 vol->override_gid = 1;
1091                         }
1092                 } else if (strnicmp(data, "file_mode", 4) == 0) {
1093                         if (value && *value) {
1094                                 vol->file_mode =
1095                                         simple_strtoul(value, &value, 0);
1096                         }
1097                 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1098                         if (value && *value) {
1099                                 vol->dir_mode =
1100                                         simple_strtoul(value, &value, 0);
1101                         }
1102                 } else if (strnicmp(data, "dirmode", 4) == 0) {
1103                         if (value && *value) {
1104                                 vol->dir_mode =
1105                                         simple_strtoul(value, &value, 0);
1106                         }
1107                 } else if (strnicmp(data, "port", 4) == 0) {
1108                         if (value && *value) {
1109                                 vol->port =
1110                                         simple_strtoul(value, &value, 0);
1111                         }
1112                 } else if (strnicmp(data, "rsize", 5) == 0) {
1113                         if (value && *value) {
1114                                 vol->rsize =
1115                                         simple_strtoul(value, &value, 0);
1116                         }
1117                 } else if (strnicmp(data, "wsize", 5) == 0) {
1118                         if (value && *value) {
1119                                 vol->wsize =
1120                                         simple_strtoul(value, &value, 0);
1121                         }
1122                 } else if (strnicmp(data, "sockopt", 5) == 0) {
1123                         if (value && *value) {
1124                                 vol->sockopt =
1125                                         simple_strtoul(value, &value, 0);
1126                         }
1127                 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1128                         if (!value || !*value || (*value == ' ')) {
1129                                 cFYI(1, ("invalid (empty) netbiosname"));
1130                         } else {
1131                                 memset(vol->source_rfc1001_name, 0x20, 15);
1132                                 for (i = 0; i < 15; i++) {
1133                                 /* BB are there cases in which a comma can be
1134                                 valid in this workstation netbios name (and need
1135                                 special handling)? */
1136
1137                                 /* We do not uppercase netbiosname for user */
1138                                         if (value[i] == 0)
1139                                                 break;
1140                                         else
1141                                                 vol->source_rfc1001_name[i] =
1142                                                                 value[i];
1143                                 }
1144                                 /* The string has 16th byte zero still from
1145                                 set at top of the function  */
1146                                 if ((i == 15) && (value[i] != 0))
1147                                         printk(KERN_WARNING "CIFS: netbiosname"
1148                                                 " longer than 15 truncated.\n");
1149                         }
1150                 } else if (strnicmp(data, "servern", 7) == 0) {
1151                         /* servernetbiosname specified override *SMBSERVER */
1152                         if (!value || !*value || (*value == ' ')) {
1153                                 cFYI(1, ("empty server netbiosname specified"));
1154                         } else {
1155                                 /* last byte, type, is 0x20 for servr type */
1156                                 memset(vol->target_rfc1001_name, 0x20, 16);
1157
1158                                 for (i = 0; i < 15; i++) {
1159                                 /* BB are there cases in which a comma can be
1160                                    valid in this workstation netbios name
1161                                    (and need special handling)? */
1162
1163                                 /* user or mount helper must uppercase
1164                                    the netbiosname */
1165                                         if (value[i] == 0)
1166                                                 break;
1167                                         else
1168                                                 vol->target_rfc1001_name[i] =
1169                                                                 value[i];
1170                                 }
1171                                 /* The string has 16th byte zero still from
1172                                    set at top of the function  */
1173                                 if ((i == 15) && (value[i] != 0))
1174                                         printk(KERN_WARNING "CIFS: server net"
1175                                         "biosname longer than 15 truncated.\n");
1176                         }
1177                 } else if (strnicmp(data, "credentials", 4) == 0) {
1178                         /* ignore */
1179                 } else if (strnicmp(data, "version", 3) == 0) {
1180                         /* ignore */
1181                 } else if (strnicmp(data, "guest", 5) == 0) {
1182                         /* ignore */
1183                 } else if (strnicmp(data, "rw", 2) == 0) {
1184                         vol->rw = TRUE;
1185                 } else if ((strnicmp(data, "suid", 4) == 0) ||
1186                                    (strnicmp(data, "nosuid", 6) == 0) ||
1187                                    (strnicmp(data, "exec", 4) == 0) ||
1188                                    (strnicmp(data, "noexec", 6) == 0) ||
1189                                    (strnicmp(data, "nodev", 5) == 0) ||
1190                                    (strnicmp(data, "noauto", 6) == 0) ||
1191                                    (strnicmp(data, "dev", 3) == 0)) {
1192                         /*  The mount tool or mount.cifs helper (if present)
1193                             uses these opts to set flags, and the flags are read
1194                             by the kernel vfs layer before we get here (ie
1195                             before read super) so there is no point trying to
1196                             parse these options again and set anything and it
1197                             is ok to just ignore them */
1198                         continue;
1199                 } else if (strnicmp(data, "ro", 2) == 0) {
1200                         vol->rw = FALSE;
1201                 } else if (strnicmp(data, "hard", 4) == 0) {
1202                         vol->retry = 1;
1203                 } else if (strnicmp(data, "soft", 4) == 0) {
1204                         vol->retry = 0;
1205                 } else if (strnicmp(data, "perm", 4) == 0) {
1206                         vol->noperm = 0;
1207                 } else if (strnicmp(data, "noperm", 6) == 0) {
1208                         vol->noperm = 1;
1209                 } else if (strnicmp(data, "mapchars", 8) == 0) {
1210                         vol->remap = 1;
1211                 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1212                         vol->remap = 0;
1213                 } else if (strnicmp(data, "sfu", 3) == 0) {
1214                         vol->sfu_emul = 1;
1215                 } else if (strnicmp(data, "nosfu", 5) == 0) {
1216                         vol->sfu_emul = 0;
1217                 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1218                         vol->posix_paths = 1;
1219                 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1220                         vol->posix_paths = 0;
1221                 } else if (strnicmp(data, "nounix", 6) == 0) {
1222                         vol->no_linux_ext = 1;
1223                 } else if (strnicmp(data, "nolinux", 7) == 0) {
1224                         vol->no_linux_ext = 1;
1225                 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1226                            (strnicmp(data, "ignorecase", 10)  == 0)) {
1227                         vol->nocase = 1;
1228                 } else if (strnicmp(data, "brl", 3) == 0) {
1229                         vol->nobrl =  0;
1230                 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1231                            (strnicmp(data, "nolock", 6) == 0)) {
1232                         vol->nobrl =  1;
1233                         /* turn off mandatory locking in mode
1234                         if remote locking is turned off since the
1235                         local vfs will do advisory */
1236                         if (vol->file_mode ==
1237                                 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1238                                 vol->file_mode = S_IALLUGO;
1239                 } else if (strnicmp(data, "setuids", 7) == 0) {
1240                         vol->setuids = 1;
1241                 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1242                         vol->setuids = 0;
1243                 } else if (strnicmp(data, "nohard", 6) == 0) {
1244                         vol->retry = 0;
1245                 } else if (strnicmp(data, "nosoft", 6) == 0) {
1246                         vol->retry = 1;
1247                 } else if (strnicmp(data, "nointr", 6) == 0) {
1248                         vol->intr = 0;
1249                 } else if (strnicmp(data, "intr", 4) == 0) {
1250                         vol->intr = 1;
1251                 } else if (strnicmp(data, "serverino", 7) == 0) {
1252                         vol->server_ino = 1;
1253                 } else if (strnicmp(data, "noserverino", 9) == 0) {
1254                         vol->server_ino = 0;
1255                 } else if (strnicmp(data, "cifsacl", 7) == 0) {
1256                         vol->cifs_acl = 1;
1257                 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1258                         vol->cifs_acl = 0;
1259                 } else if (strnicmp(data, "acl", 3) == 0) {
1260                         vol->no_psx_acl = 0;
1261                 } else if (strnicmp(data, "noacl", 5) == 0) {
1262                         vol->no_psx_acl = 1;
1263                 } else if (strnicmp(data, "sign", 4) == 0) {
1264                         vol->secFlg |= CIFSSEC_MUST_SIGN;
1265 /*              } else if (strnicmp(data, "seal",4) == 0) {
1266                         vol->secFlg |= CIFSSEC_MUST_SEAL; */
1267                 } else if (strnicmp(data, "direct", 6) == 0) {
1268                         vol->direct_io = 1;
1269                 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
1270                         vol->direct_io = 1;
1271                 } else if (strnicmp(data, "in6_addr", 8) == 0) {
1272                         if (!value || !*value) {
1273                                 vol->in6_addr = NULL;
1274                         } else if (strnlen(value, 49) == 48) {
1275                                 vol->in6_addr = value;
1276                         } else {
1277                                 printk(KERN_WARNING "CIFS: ip v6 address not "
1278                                                     "48 characters long\n");
1279                                 return 1;
1280                         }
1281                 } else if (strnicmp(data, "noac", 4) == 0) {
1282                         printk(KERN_WARNING "CIFS: Mount option noac not "
1283                                 "supported. Instead set "
1284                                 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1285                 } else
1286                         printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1287                                                 data);
1288         }
1289         if (vol->UNC == NULL) {
1290                 if (devname == NULL) {
1291                         printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1292                                                 "target\n");
1293                         return 1;
1294                 }
1295                 if ((temp_len = strnlen(devname, 300)) < 300) {
1296                         vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1297                         if (vol->UNC == NULL)
1298                                 return 1;
1299                         strcpy(vol->UNC, devname);
1300                         if (strncmp(vol->UNC, "//", 2) == 0) {
1301                                 vol->UNC[0] = '\\';
1302                                 vol->UNC[1] = '\\';
1303                         } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1304                                 printk(KERN_WARNING "CIFS: UNC Path does not "
1305                                                     "begin with // or \\\\ \n");
1306                                 return 1;
1307                         }
1308                 } else {
1309                         printk(KERN_WARNING "CIFS: UNC name too long\n");
1310                         return 1;
1311                 }
1312         }
1313         if (vol->UNCip == NULL)
1314                 vol->UNCip = &vol->UNC[2];
1315
1316         return 0;
1317 }
1318
1319 static struct cifsSesInfo *
1320 cifs_find_tcp_session(struct in_addr *target_ip_addr,
1321                 struct in6_addr *target_ip6_addr,
1322                  char *userName, struct TCP_Server_Info **psrvTcp)
1323 {
1324         struct list_head *tmp;
1325         struct cifsSesInfo *ses;
1326         *psrvTcp = NULL;
1327         read_lock(&GlobalSMBSeslock);
1328
1329         list_for_each(tmp, &GlobalSMBSessionList) {
1330                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
1331                 if (ses->server) {
1332                         if ((target_ip_addr &&
1333                                 (ses->server->addr.sockAddr.sin_addr.s_addr
1334                                   == target_ip_addr->s_addr)) || (target_ip6_addr
1335                                 && memcmp(&ses->server->addr.sockAddr6.sin6_addr,
1336                                         target_ip6_addr, sizeof(*target_ip6_addr)))) {
1337                                 /* BB lock server and tcp session and increment
1338                                       use count here?? */
1339
1340                                 /* found a match on the TCP session */
1341                                 *psrvTcp = ses->server;
1342
1343                                 /* BB check if reconnection needed */
1344                                 if (strncmp
1345                                     (ses->userName, userName,
1346                                      MAX_USERNAME_SIZE) == 0){
1347                                         read_unlock(&GlobalSMBSeslock);
1348                                         /* Found exact match on both TCP and
1349                                            SMB sessions */
1350                                         return ses;
1351                                 }
1352                         }
1353                 }
1354                 /* else tcp and smb sessions need reconnection */
1355         }
1356         read_unlock(&GlobalSMBSeslock);
1357         return NULL;
1358 }
1359
1360 static struct cifsTconInfo *
1361 find_unc(__be32 new_target_ip_addr, char *uncName, char *userName)
1362 {
1363         struct list_head *tmp;
1364         struct cifsTconInfo *tcon;
1365
1366         read_lock(&GlobalSMBSeslock);
1367         list_for_each(tmp, &GlobalTreeConnectionList) {
1368                 cFYI(1, ("Next tcon"));
1369                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
1370                 if (tcon->ses) {
1371                         if (tcon->ses->server) {
1372                                 cFYI(1,
1373                                      ("old ip addr: %x == new ip %x ?",
1374                                       tcon->ses->server->addr.sockAddr.sin_addr.
1375                                       s_addr, new_target_ip_addr));
1376                                 if (tcon->ses->server->addr.sockAddr.sin_addr.
1377                                     s_addr == new_target_ip_addr) {
1378         /* BB lock tcon, server and tcp session and increment use count here? */
1379                                         /* found a match on the TCP session */
1380                                         /* BB check if reconnection needed */
1381                                         cFYI(1,
1382                                               ("IP match, old UNC: %s new: %s",
1383                                               tcon->treeName, uncName));
1384                                         if (strncmp
1385                                             (tcon->treeName, uncName,
1386                                              MAX_TREE_SIZE) == 0) {
1387                                                 cFYI(1,
1388                                                      ("and old usr: %s new: %s",
1389                                                       tcon->treeName, uncName));
1390                                                 if (strncmp
1391                                                     (tcon->ses->userName,
1392                                                      userName,
1393                                                      MAX_USERNAME_SIZE) == 0) {
1394                                                         read_unlock(&GlobalSMBSeslock);
1395                                                         /* matched smb session
1396                                                         (user name */
1397                                                         return tcon;
1398                                                 }
1399                                         }
1400                                 }
1401                         }
1402                 }
1403         }
1404         read_unlock(&GlobalSMBSeslock);
1405         return NULL;
1406 }
1407
1408 int
1409 connect_to_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1410                     const char *old_path, const struct nls_table *nls_codepage,
1411                     int remap)
1412 {
1413         struct dfs_info3_param *referrals = NULL;
1414         unsigned int num_referrals;
1415         int rc = 0;
1416
1417         rc = get_dfs_path(xid, pSesInfo, old_path, nls_codepage,
1418                         &num_referrals, &referrals, remap);
1419
1420         /* BB Add in code to: if valid refrl, if not ip address contact
1421                 the helper that resolves tcp names, mount to it, try to
1422                 tcon to it unmount it if fail */
1423
1424         kfree(referrals);
1425
1426         return rc;
1427 }
1428
1429 int
1430 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
1431              const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
1432              struct dfs_info3_param **preferrals, int remap)
1433 {
1434         char *temp_unc;
1435         int rc = 0;
1436         unsigned char *targetUNCs;
1437
1438         *pnum_referrals = 0;
1439         *preferrals = NULL;
1440
1441         if (pSesInfo->ipc_tid == 0) {
1442                 temp_unc = kmalloc(2 /* for slashes */ +
1443                         strnlen(pSesInfo->serverName,
1444                                 SERVER_NAME_LEN_WITH_NULL * 2)
1445                                  + 1 + 4 /* slash IPC$ */  + 2,
1446                                 GFP_KERNEL);
1447                 if (temp_unc == NULL)
1448                         return -ENOMEM;
1449                 temp_unc[0] = '\\';
1450                 temp_unc[1] = '\\';
1451                 strcpy(temp_unc + 2, pSesInfo->serverName);
1452                 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1453                 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1454                 cFYI(1,
1455                      ("CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid));
1456                 kfree(temp_unc);
1457         }
1458         if (rc == 0)
1459                 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, &targetUNCs,
1460                                      pnum_referrals, nls_codepage, remap);
1461         /* BB map targetUNCs to dfs_info3 structures, here or
1462                 in CIFSGetDFSRefer BB */
1463
1464         return rc;
1465 }
1466
1467 /* See RFC1001 section 14 on representation of Netbios names */
1468 static void rfc1002mangle(char *target, char *source, unsigned int length)
1469 {
1470         unsigned int i, j;
1471
1472         for (i = 0, j = 0; i < (length); i++) {
1473                 /* mask a nibble at a time and encode */
1474                 target[j] = 'A' + (0x0F & (source[i] >> 4));
1475                 target[j+1] = 'A' + (0x0F & source[i]);
1476                 j += 2;
1477         }
1478
1479 }
1480
1481
1482 static int
1483 ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
1484              char *netbios_name, char *target_name)
1485 {
1486         int rc = 0;
1487         int connected = 0;
1488         __be16 orig_port = 0;
1489
1490         if (*csocket == NULL) {
1491                 rc = sock_create_kern(PF_INET, SOCK_STREAM,
1492                                       IPPROTO_TCP, csocket);
1493                 if (rc < 0) {
1494                         cERROR(1, ("Error %d creating socket", rc));
1495                         *csocket = NULL;
1496                         return rc;
1497                 } else {
1498                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1499                         cFYI(1, ("Socket created"));
1500                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1501                 }
1502         }
1503
1504         psin_server->sin_family = AF_INET;
1505         if (psin_server->sin_port) { /* user overrode default port */
1506                 rc = (*csocket)->ops->connect(*csocket,
1507                                 (struct sockaddr *) psin_server,
1508                                 sizeof(struct sockaddr_in), 0);
1509                 if (rc >= 0)
1510                         connected = 1;
1511         }
1512
1513         if (!connected) {
1514                 /* save original port so we can retry user specified port
1515                         later if fall back ports fail this time  */
1516                 orig_port = psin_server->sin_port;
1517
1518                 /* do not retry on the same port we just failed on */
1519                 if (psin_server->sin_port != htons(CIFS_PORT)) {
1520                         psin_server->sin_port = htons(CIFS_PORT);
1521
1522                         rc = (*csocket)->ops->connect(*csocket,
1523                                         (struct sockaddr *) psin_server,
1524                                         sizeof(struct sockaddr_in), 0);
1525                         if (rc >= 0)
1526                                 connected = 1;
1527                 }
1528         }
1529         if (!connected) {
1530                 psin_server->sin_port = htons(RFC1001_PORT);
1531                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1532                                               psin_server,
1533                                               sizeof(struct sockaddr_in), 0);
1534                 if (rc >= 0)
1535                         connected = 1;
1536         }
1537
1538         /* give up here - unless we want to retry on different
1539                 protocol families some day */
1540         if (!connected) {
1541                 if (orig_port)
1542                         psin_server->sin_port = orig_port;
1543                 cFYI(1, ("Error %d connecting to server via ipv4", rc));
1544                 sock_release(*csocket);
1545                 *csocket = NULL;
1546                 return rc;
1547         }
1548         /* Eventually check for other socket options to change from
1549                 the default. sock_setsockopt not used because it expects
1550                 user space buffer */
1551          cFYI(1, ("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
1552                  (*csocket)->sk->sk_sndbuf,
1553                  (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
1554         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1555         /* make the bufsizes depend on wsize/rsize and max requests */
1556         if ((*csocket)->sk->sk_sndbuf < (200 * 1024))
1557                 (*csocket)->sk->sk_sndbuf = 200 * 1024;
1558         if ((*csocket)->sk->sk_rcvbuf < (140 * 1024))
1559                 (*csocket)->sk->sk_rcvbuf = 140 * 1024;
1560
1561         /* send RFC1001 sessinit */
1562         if (psin_server->sin_port == htons(RFC1001_PORT)) {
1563                 /* some servers require RFC1001 sessinit before sending
1564                 negprot - BB check reconnection in case where second
1565                 sessinit is sent but no second negprot */
1566                 struct rfc1002_session_packet *ses_init_buf;
1567                 struct smb_hdr *smb_buf;
1568                 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
1569                                        GFP_KERNEL);
1570                 if (ses_init_buf) {
1571                         ses_init_buf->trailer.session_req.called_len = 32;
1572                         if (target_name && (target_name[0] != 0)) {
1573                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1574                                         target_name, 16);
1575                         } else {
1576                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1577                                         DEFAULT_CIFS_CALLED_NAME, 16);
1578                         }
1579
1580                         ses_init_buf->trailer.session_req.calling_len = 32;
1581                         /* calling name ends in null (byte 16) from old smb
1582                         convention. */
1583                         if (netbios_name && (netbios_name[0] != 0)) {
1584                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1585                                         netbios_name, 16);
1586                         } else {
1587                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1588                                         "LINUX_CIFS_CLNT", 16);
1589                         }
1590                         ses_init_buf->trailer.session_req.scope1 = 0;
1591                         ses_init_buf->trailer.session_req.scope2 = 0;
1592                         smb_buf = (struct smb_hdr *)ses_init_buf;
1593                         /* sizeof RFC1002_SESSION_REQUEST with no scope */
1594                         smb_buf->smb_buf_length = 0x81000044;
1595                         rc = smb_send(*csocket, smb_buf, 0x44,
1596                                 (struct sockaddr *)psin_server);
1597                         kfree(ses_init_buf);
1598                         msleep(1); /* RFC1001 layer in at least one server
1599                                       requires very short break before negprot
1600                                       presumably because not expecting negprot
1601                                       to follow so fast.  This is a simple
1602                                       solution that works without
1603                                       complicating the code and causes no
1604                                       significant slowing down on mount
1605                                       for everyone else */
1606                 }
1607                 /* else the negprot may still work without this
1608                 even though malloc failed */
1609
1610         }
1611
1612         return rc;
1613 }
1614
1615 static int
1616 ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
1617 {
1618         int rc = 0;
1619         int connected = 0;
1620         __be16 orig_port = 0;
1621
1622         if (*csocket == NULL) {
1623                 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
1624                                       IPPROTO_TCP, csocket);
1625                 if (rc < 0) {
1626                         cERROR(1, ("Error %d creating ipv6 socket", rc));
1627                         *csocket = NULL;
1628                         return rc;
1629                 } else {
1630                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1631                          cFYI(1, ("ipv6 Socket created"));
1632                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1633                 }
1634         }
1635
1636         psin_server->sin6_family = AF_INET6;
1637
1638         if (psin_server->sin6_port) { /* user overrode default port */
1639                 rc = (*csocket)->ops->connect(*csocket,
1640                                 (struct sockaddr *) psin_server,
1641                                 sizeof(struct sockaddr_in6), 0);
1642                 if (rc >= 0)
1643                         connected = 1;
1644         }
1645
1646         if (!connected) {
1647                 /* save original port so we can retry user specified port
1648                         later if fall back ports fail this time  */
1649
1650                 orig_port = psin_server->sin6_port;
1651                 /* do not retry on the same port we just failed on */
1652                 if (psin_server->sin6_port != htons(CIFS_PORT)) {
1653                         psin_server->sin6_port = htons(CIFS_PORT);
1654
1655                         rc = (*csocket)->ops->connect(*csocket,
1656                                         (struct sockaddr *) psin_server,
1657                                         sizeof(struct sockaddr_in6), 0);
1658                         if (rc >= 0)
1659                                 connected = 1;
1660                 }
1661         }
1662         if (!connected) {
1663                 psin_server->sin6_port = htons(RFC1001_PORT);
1664                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1665                                  psin_server, sizeof(struct sockaddr_in6), 0);
1666                 if (rc >= 0)
1667                         connected = 1;
1668         }
1669
1670         /* give up here - unless we want to retry on different
1671                 protocol families some day */
1672         if (!connected) {
1673                 if (orig_port)
1674                         psin_server->sin6_port = orig_port;
1675                 cFYI(1, ("Error %d connecting to server via ipv6", rc));
1676                 sock_release(*csocket);
1677                 *csocket = NULL;
1678                 return rc;
1679         }
1680         /* Eventually check for other socket options to change from
1681                 the default. sock_setsockopt not used because it expects
1682                 user space buffer */
1683         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1684
1685         return rc;
1686 }
1687
1688 void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
1689                           struct super_block *sb, struct smb_vol *vol_info)
1690 {
1691         /* if we are reconnecting then should we check to see if
1692          * any requested capabilities changed locally e.g. via
1693          * remount but we can not do much about it here
1694          * if they have (even if we could detect it by the following)
1695          * Perhaps we could add a backpointer to array of sb from tcon
1696          * or if we change to make all sb to same share the same
1697          * sb as NFS - then we only have one backpointer to sb.
1698          * What if we wanted to mount the server share twice once with
1699          * and once without posixacls or posix paths? */
1700         __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1701
1702         if (vol_info && vol_info->no_linux_ext) {
1703                 tcon->fsUnixInfo.Capability = 0;
1704                 tcon->unix_ext = 0; /* Unix Extensions disabled */
1705                 cFYI(1, ("Linux protocol extensions disabled"));
1706                 return;
1707         } else if (vol_info)
1708                 tcon->unix_ext = 1; /* Unix Extensions supported */
1709
1710         if (tcon->unix_ext == 0) {
1711                 cFYI(1, ("Unix extensions disabled so not set on reconnect"));
1712                 return;
1713         }
1714
1715         if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
1716                 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1717
1718                 /* check for reconnect case in which we do not
1719                    want to change the mount behavior if we can avoid it */
1720                 if (vol_info == NULL) {
1721                         /* turn off POSIX ACL and PATHNAMES if not set
1722                            originally at mount time */
1723                         if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
1724                                 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1725                         if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0)
1726                                 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1727                 }
1728
1729                 cap &= CIFS_UNIX_CAP_MASK;
1730                 if (vol_info && vol_info->no_psx_acl)
1731                         cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1732                 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
1733                         cFYI(1, ("negotiated posix acl support"));
1734                         if (sb)
1735                                 sb->s_flags |= MS_POSIXACL;
1736                 }
1737
1738                 if (vol_info && vol_info->posix_paths == 0)
1739                         cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1740                 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
1741                         cFYI(1, ("negotiate posix pathnames"));
1742                         if (sb)
1743                                 CIFS_SB(sb)->mnt_cifs_flags |=
1744                                         CIFS_MOUNT_POSIX_PATHS;
1745                 }
1746
1747                 /* We might be setting the path sep back to a different
1748                 form if we are reconnecting and the server switched its
1749                 posix path capability for this share */
1750                 if (sb && (CIFS_SB(sb)->prepathlen > 0))
1751                         CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
1752
1753                 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
1754                         if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
1755                                 CIFS_SB(sb)->rsize = 127 * 1024;
1756 #ifdef CONFIG_CIFS_DEBUG2
1757                                 cFYI(1, ("larger reads not supported by srv"));
1758 #endif
1759                         }
1760                 }
1761
1762
1763                 cFYI(1, ("Negotiate caps 0x%x", (int)cap));
1764 #ifdef CONFIG_CIFS_DEBUG2
1765                 if (cap & CIFS_UNIX_FCNTL_CAP)
1766                         cFYI(1, ("FCNTL cap"));
1767                 if (cap & CIFS_UNIX_EXTATTR_CAP)
1768                         cFYI(1, ("EXTATTR cap"));
1769                 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
1770                         cFYI(1, ("POSIX path cap"));
1771                 if (cap & CIFS_UNIX_XATTR_CAP)
1772                         cFYI(1, ("XATTR cap"));
1773                 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
1774                         cFYI(1, ("POSIX ACL cap"));
1775                 if (cap & CIFS_UNIX_LARGE_READ_CAP)
1776                         cFYI(1, ("very large read cap"));
1777                 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
1778                         cFYI(1, ("very large write cap"));
1779 #endif /* CIFS_DEBUG2 */
1780                 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
1781                         if (vol_info == NULL) {
1782                                 cFYI(1, ("resetting capabilities failed"));
1783                         } else
1784                                 cERROR(1, ("Negotiating Unix capabilities "
1785                                            "with the server failed.  Consider "
1786                                            "mounting with the Unix Extensions\n"
1787                                            "disabled, if problems are found, "
1788                                            "by specifying the nounix mount "
1789                                            "option."));
1790
1791                 }
1792         }
1793 }
1794
1795 int
1796 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
1797            char *mount_data, const char *devname)
1798 {
1799         int rc = 0;
1800         int xid;
1801         int address_type = AF_INET;
1802         struct socket *csocket = NULL;
1803         struct sockaddr_in sin_server;
1804         struct sockaddr_in6 sin_server6;
1805         struct smb_vol volume_info;
1806         struct cifsSesInfo *pSesInfo = NULL;
1807         struct cifsSesInfo *existingCifsSes = NULL;
1808         struct cifsTconInfo *tcon = NULL;
1809         struct TCP_Server_Info *srvTcp = NULL;
1810
1811         xid = GetXid();
1812
1813 /* cFYI(1, ("Entering cifs_mount. Xid: %d with: %s", xid, mount_data)); */
1814
1815         memset(&volume_info, 0, sizeof(struct smb_vol));
1816         if (cifs_parse_mount_options(mount_data, devname, &volume_info)) {
1817                 rc = -EINVAL;
1818                 goto out;
1819         }
1820
1821         if (volume_info.nullauth) {
1822                 cFYI(1, ("null user"));
1823                 volume_info.username = "";
1824         } else if (volume_info.username) {
1825                 /* BB fixme parse for domain name here */
1826                 cFYI(1, ("Username: %s", volume_info.username));
1827         } else {
1828                 cifserror("No username specified");
1829         /* In userspace mount helper we can get user name from alternate
1830            locations such as env variables and files on disk */
1831                 rc = -EINVAL;
1832                 goto out;
1833         }
1834
1835         if (volume_info.UNCip && volume_info.UNC) {
1836                 rc = cifs_inet_pton(AF_INET, volume_info.UNCip,
1837                                     &sin_server.sin_addr.s_addr);
1838
1839                 if (rc <= 0) {
1840                         /* not ipv4 address, try ipv6 */
1841                         rc = cifs_inet_pton(AF_INET6, volume_info.UNCip,
1842                                             &sin_server6.sin6_addr.in6_u);
1843                         if (rc > 0)
1844                                 address_type = AF_INET6;
1845                 } else {
1846                         address_type = AF_INET;
1847                 }
1848
1849                 if (rc <= 0) {
1850                         /* we failed translating address */
1851                         rc = -EINVAL;
1852                         goto out;
1853                 }
1854
1855                 cFYI(1, ("UNC: %s ip: %s", volume_info.UNC, volume_info.UNCip));
1856                 /* success */
1857                 rc = 0;
1858         } else if (volume_info.UNCip) {
1859                 /* BB using ip addr as server name to connect to the
1860                    DFS root below */
1861                 cERROR(1, ("Connecting to DFS root not implemented yet"));
1862                 rc = -EINVAL;
1863                 goto out;
1864         } else /* which servers DFS root would we conect to */ {
1865                 cERROR(1,
1866                        ("CIFS mount error: No UNC path (e.g. -o "
1867                         "unc=//192.168.1.100/public) specified"));
1868                 rc = -EINVAL;
1869                 goto out;
1870         }
1871
1872         /* this is needed for ASCII cp to Unicode converts */
1873         if (volume_info.iocharset == NULL) {
1874                 cifs_sb->local_nls = load_nls_default();
1875         /* load_nls_default can not return null */
1876         } else {
1877                 cifs_sb->local_nls = load_nls(volume_info.iocharset);
1878                 if (cifs_sb->local_nls == NULL) {
1879                         cERROR(1, ("CIFS mount error: iocharset %s not found",
1880                                  volume_info.iocharset));
1881                         rc = -ELIBACC;
1882                         goto out;
1883                 }
1884         }
1885
1886         if (address_type == AF_INET)
1887                 existingCifsSes = cifs_find_tcp_session(&sin_server.sin_addr,
1888                         NULL /* no ipv6 addr */,
1889                         volume_info.username, &srvTcp);
1890         else if (address_type == AF_INET6) {
1891                 cFYI(1, ("looking for ipv6 address"));
1892                 existingCifsSes = cifs_find_tcp_session(NULL /* no ipv4 addr */,
1893                         &sin_server6.sin6_addr,
1894                         volume_info.username, &srvTcp);
1895         } else {
1896                 rc = -EINVAL;
1897                 goto out;
1898         }
1899
1900         if (srvTcp) {
1901                 cFYI(1, ("Existing tcp session with server found"));
1902         } else {        /* create socket */
1903                 if (volume_info.port)
1904                         sin_server.sin_port = htons(volume_info.port);
1905                 else
1906                         sin_server.sin_port = 0;
1907                 if (address_type == AF_INET6) {
1908                         cFYI(1, ("attempting ipv6 connect"));
1909                         /* BB should we allow ipv6 on port 139? */
1910                         /* other OS never observed in Wild doing 139 with v6 */
1911                         rc = ipv6_connect(&sin_server6, &csocket);
1912                 } else
1913                         rc = ipv4_connect(&sin_server, &csocket,
1914                                   volume_info.source_rfc1001_name,
1915                                   volume_info.target_rfc1001_name);
1916                 if (rc < 0) {
1917                         cERROR(1, ("Error connecting to IPv4 socket. "
1918                                    "Aborting operation"));
1919                         if (csocket != NULL)
1920                                 sock_release(csocket);
1921                         goto out;
1922                 }
1923
1924                 srvTcp = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1925                 if (!srvTcp) {
1926                         rc = -ENOMEM;
1927                         sock_release(csocket);
1928                         goto out;
1929                 } else {
1930                         memcpy(&srvTcp->addr.sockAddr, &sin_server,
1931                                 sizeof(struct sockaddr_in));
1932                         atomic_set(&srvTcp->inFlight, 0);
1933                         /* BB Add code for ipv6 case too */
1934                         srvTcp->ssocket = csocket;
1935                         srvTcp->protocolType = IPV4;
1936                         srvTcp->hostname = extract_hostname(volume_info.UNC);
1937                         if (IS_ERR(srvTcp->hostname)) {
1938                                 rc = PTR_ERR(srvTcp->hostname);
1939                                 sock_release(csocket);
1940                                 goto out;
1941                         }
1942                         init_waitqueue_head(&srvTcp->response_q);
1943                         init_waitqueue_head(&srvTcp->request_q);
1944                         INIT_LIST_HEAD(&srvTcp->pending_mid_q);
1945                         /* at this point we are the only ones with the pointer
1946                         to the struct since the kernel thread not created yet
1947                         so no need to spinlock this init of tcpStatus */
1948                         srvTcp->tcpStatus = CifsNew;
1949                         init_MUTEX(&srvTcp->tcpSem);
1950                         srvTcp->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, srvTcp, "cifsd");
1951                         if (IS_ERR(srvTcp->tsk)) {
1952                                 rc = PTR_ERR(srvTcp->tsk);
1953                                 cERROR(1, ("error %d create cifsd thread", rc));
1954                                 srvTcp->tsk = NULL;
1955                                 sock_release(csocket);
1956                                 kfree(srvTcp->hostname);
1957                                 goto out;
1958                         }
1959                         wait_for_completion(&cifsd_complete);
1960                         rc = 0;
1961                         memcpy(srvTcp->workstation_RFC1001_name,
1962                                 volume_info.source_rfc1001_name, 16);
1963                         memcpy(srvTcp->server_RFC1001_name,
1964                                 volume_info.target_rfc1001_name, 16);
1965                         srvTcp->sequence_number = 0;
1966                 }
1967         }
1968
1969         if (existingCifsSes) {
1970                 pSesInfo = existingCifsSes;
1971                 cFYI(1, ("Existing smb sess found (status=%d)",
1972                         pSesInfo->status));
1973                 down(&pSesInfo->sesSem);
1974                 if (pSesInfo->status == CifsNeedReconnect) {
1975                         cFYI(1, ("Session needs reconnect"));
1976                         rc = cifs_setup_session(xid, pSesInfo,
1977                                                 cifs_sb->local_nls);
1978                 }
1979                 up(&pSesInfo->sesSem);
1980         } else if (!rc) {
1981                 cFYI(1, ("Existing smb sess not found"));
1982                 pSesInfo = sesInfoAlloc();
1983                 if (pSesInfo == NULL)
1984                         rc = -ENOMEM;
1985                 else {
1986                         pSesInfo->server = srvTcp;
1987                         sprintf(pSesInfo->serverName, "%u.%u.%u.%u",
1988                                 NIPQUAD(sin_server.sin_addr.s_addr));
1989                 }
1990
1991                 if (!rc) {
1992                         /* volume_info.password freed at unmount */
1993                         if (volume_info.password) {
1994                                 pSesInfo->password = volume_info.password;
1995                                 /* set to NULL to prevent freeing on exit */
1996                                 volume_info.password = NULL;
1997                         }
1998                         if (volume_info.username)
1999                                 strncpy(pSesInfo->userName,
2000                                         volume_info.username,
2001                                         MAX_USERNAME_SIZE);
2002                         if (volume_info.domainname) {
2003                                 int len = strlen(volume_info.domainname);
2004                                 pSesInfo->domainName =
2005                                         kmalloc(len + 1, GFP_KERNEL);
2006                                 if (pSesInfo->domainName)
2007                                         strcpy(pSesInfo->domainName,
2008                                                 volume_info.domainname);
2009                         }
2010                         pSesInfo->linux_uid = volume_info.linux_uid;
2011                         pSesInfo->overrideSecFlg = volume_info.secFlg;
2012                         down(&pSesInfo->sesSem);
2013                         /* BB FIXME need to pass vol->secFlgs BB */
2014                         rc = cifs_setup_session(xid, pSesInfo,
2015                                                 cifs_sb->local_nls);
2016                         up(&pSesInfo->sesSem);
2017                         if (!rc)
2018                                 atomic_inc(&srvTcp->socketUseCount);
2019                 }
2020         }
2021
2022         /* search for existing tcon to this server share */
2023         if (!rc) {
2024                 if (volume_info.rsize > CIFSMaxBufSize) {
2025                         cERROR(1, ("rsize %d too large, using MaxBufSize",
2026                                 volume_info.rsize));
2027                         cifs_sb->rsize = CIFSMaxBufSize;
2028                 } else if ((volume_info.rsize) &&
2029                                 (volume_info.rsize <= CIFSMaxBufSize))
2030                         cifs_sb->rsize = volume_info.rsize;
2031                 else /* default */
2032                         cifs_sb->rsize = CIFSMaxBufSize;
2033
2034                 if (volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
2035                         cERROR(1, ("wsize %d too large, using 4096 instead",
2036                                   volume_info.wsize));
2037                         cifs_sb->wsize = 4096;
2038                 } else if (volume_info.wsize)
2039                         cifs_sb->wsize = volume_info.wsize;
2040                 else
2041                         cifs_sb->wsize =
2042                                 min_t(const int, PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2043                                         127*1024);
2044                         /* old default of CIFSMaxBufSize was too small now
2045                            that SMB Write2 can send multiple pages in kvec.
2046                            RFC1001 does not describe what happens when frame
2047                            bigger than 128K is sent so use that as max in
2048                            conjunction with 52K kvec constraint on arch with 4K
2049                            page size  */
2050
2051                 if (cifs_sb->rsize < 2048) {
2052                         cifs_sb->rsize = 2048;
2053                         /* Windows ME may prefer this */
2054                         cFYI(1, ("readsize set to minimum: 2048"));
2055                 }
2056                 /* calculate prepath */
2057                 cifs_sb->prepath = volume_info.prepath;
2058                 if (cifs_sb->prepath) {
2059                         cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2060                         cifs_sb->prepath[0] = CIFS_DIR_SEP(cifs_sb);
2061                         volume_info.prepath = NULL;
2062                 } else
2063                         cifs_sb->prepathlen = 0;
2064                 cifs_sb->mnt_uid = volume_info.linux_uid;
2065                 cifs_sb->mnt_gid = volume_info.linux_gid;
2066                 cifs_sb->mnt_file_mode = volume_info.file_mode;
2067                 cifs_sb->mnt_dir_mode = volume_info.dir_mode;
2068                 cFYI(1, ("file mode: 0x%x  dir mode: 0x%x",
2069                         cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode));
2070
2071                 if (volume_info.noperm)
2072                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2073                 if (volume_info.setuids)
2074                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2075                 if (volume_info.server_ino)
2076                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2077                 if (volume_info.remap)
2078                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2079                 if (volume_info.no_xattr)
2080                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2081                 if (volume_info.sfu_emul)
2082                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2083                 if (volume_info.nobrl)
2084                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2085                 if (volume_info.cifs_acl)
2086                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2087                 if (volume_info.override_uid)
2088                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2089                 if (volume_info.override_gid)
2090                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2091                 if (volume_info.direct_io) {
2092                         cFYI(1, ("mounting share using direct i/o"));
2093                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2094                 }
2095
2096                 tcon =
2097                     find_unc(sin_server.sin_addr.s_addr, volume_info.UNC,
2098                              volume_info.username);
2099                 if (tcon) {
2100                         cFYI(1, ("Found match on UNC path"));
2101                         /* we can have only one retry value for a connection
2102                            to a share so for resources mounted more than once
2103                            to the same server share the last value passed in
2104                            for the retry flag is used */
2105                         tcon->retry = volume_info.retry;
2106                         tcon->nocase = volume_info.nocase;
2107                 } else {
2108                         tcon = tconInfoAlloc();
2109                         if (tcon == NULL)
2110                                 rc = -ENOMEM;
2111                         else {
2112                                 /* check for null share name ie connecting to
2113                                  * dfs root */
2114
2115                                 /* BB check if this works for exactly length
2116                                  * three strings */
2117                                 if ((strchr(volume_info.UNC + 3, '\\') == NULL)
2118                                     && (strchr(volume_info.UNC + 3, '/') ==
2119                                         NULL)) {
2120                                         rc = connect_to_dfs_path(xid, pSesInfo,
2121                                                 "", cifs_sb->local_nls,
2122                                                 cifs_sb->mnt_cifs_flags &
2123                                                   CIFS_MOUNT_MAP_SPECIAL_CHR);
2124                                         rc = -ENODEV;
2125                                         goto out;
2126                                 } else {
2127                                         /* BB Do we need to wrap sesSem around
2128                                          * this TCon call and Unix SetFS as
2129                                          * we do on SessSetup and reconnect? */
2130                                         rc = CIFSTCon(xid, pSesInfo,
2131                                                 volume_info.UNC,
2132                                                 tcon, cifs_sb->local_nls);
2133                                         cFYI(1, ("CIFS Tcon rc = %d", rc));
2134                                 }
2135                                 if (!rc) {
2136                                         atomic_inc(&pSesInfo->inUse);
2137                                         tcon->retry = volume_info.retry;
2138                                         tcon->nocase = volume_info.nocase;
2139                                 }
2140                         }
2141                 }
2142         }
2143         if (pSesInfo) {
2144                 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
2145                         sb->s_maxbytes = (u64) 1 << 63;
2146                 } else
2147                         sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
2148         }
2149
2150         /* BB FIXME fix time_gran to be larger for LANMAN sessions */
2151         sb->s_time_gran = 100;
2152
2153 /* on error free sesinfo and tcon struct if needed */
2154         if (rc) {
2155                 /* if session setup failed, use count is zero but
2156                 we still need to free cifsd thread */
2157                 if (atomic_read(&srvTcp->socketUseCount) == 0) {
2158                         spin_lock(&GlobalMid_Lock);
2159                         srvTcp->tcpStatus = CifsExiting;
2160                         spin_unlock(&GlobalMid_Lock);
2161                         if (srvTcp->tsk) {
2162                                 struct task_struct *tsk;
2163                                 /* If we could verify that kthread_stop would
2164                                    always wake up processes blocked in
2165                                    tcp in recv_mesg then we could remove the
2166                                    send_sig call */
2167                                 force_sig(SIGKILL, srvTcp->tsk);
2168                                 tsk = srvTcp->tsk;
2169                                 if (tsk)
2170                                         kthread_stop(tsk);
2171                         }
2172                 }
2173                  /* If find_unc succeeded then rc == 0 so we can not end */
2174                 if (tcon)  /* up accidently freeing someone elses tcon struct */
2175                         tconInfoFree(tcon);
2176                 if (existingCifsSes == NULL) {
2177                         if (pSesInfo) {
2178                                 if ((pSesInfo->server) &&
2179                                     (pSesInfo->status == CifsGood)) {
2180                                         int temp_rc;
2181                                         temp_rc = CIFSSMBLogoff(xid, pSesInfo);
2182                                         /* if the socketUseCount is now zero */
2183                                         if ((temp_rc == -ESHUTDOWN) &&
2184                                             (pSesInfo->server) &&
2185                                             (pSesInfo->server->tsk)) {
2186                                                 struct task_struct *tsk;
2187                                                 force_sig(SIGKILL,
2188                                                         pSesInfo->server->tsk);
2189                                                 tsk = pSesInfo->server->tsk;
2190                                                 if (tsk)
2191                                                         kthread_stop(tsk);
2192                                         }
2193                                 } else {
2194                                         cFYI(1, ("No session or bad tcon"));
2195                                         if ((pSesInfo->server) &&
2196                                             (pSesInfo->server->tsk)) {
2197                                                 struct task_struct *tsk;
2198                                                 force_sig(SIGKILL,
2199                                                         pSesInfo->server->tsk);
2200                                                 tsk = pSesInfo->server->tsk;
2201                                                 if (tsk)
2202                                                         kthread_stop(tsk);
2203                                         }
2204                                 }
2205                                 sesInfoFree(pSesInfo);
2206                                 /* pSesInfo = NULL; */
2207                         }
2208                 }
2209         } else {
2210                 atomic_inc(&tcon->useCount);
2211                 cifs_sb->tcon = tcon;
2212                 tcon->ses = pSesInfo;
2213
2214                 /* do not care if following two calls succeed - informational */
2215                 if (!tcon->ipc) {
2216                         CIFSSMBQFSDeviceInfo(xid, tcon);
2217                         CIFSSMBQFSAttributeInfo(xid, tcon);
2218                 }
2219
2220                 /* tell server which Unix caps we support */
2221                 if (tcon->ses->capabilities & CAP_UNIX)
2222                         /* reset of caps checks mount to see if unix extensions
2223                            disabled for just this mount */
2224                         reset_cifs_unix_caps(xid, tcon, sb, &volume_info);
2225                 else
2226                         tcon->unix_ext = 0; /* server does not support them */
2227
2228                 if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2229                         cifs_sb->rsize = 1024 * 127;
2230 #ifdef CONFIG_CIFS_DEBUG2
2231                         cFYI(1, ("no very large read support, rsize now 127K"));
2232 #endif
2233                 }
2234                 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2235                         cifs_sb->wsize = min(cifs_sb->wsize,
2236                                              (tcon->ses->server->maxBuf -
2237                                               MAX_CIFS_HDR_SIZE));
2238                 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2239                         cifs_sb->rsize = min(cifs_sb->rsize,
2240                                              (tcon->ses->server->maxBuf -
2241                                               MAX_CIFS_HDR_SIZE));
2242         }
2243
2244         /* volume_info.password is freed above when existing session found
2245         (in which case it is not needed anymore) but when new sesion is created
2246         the password ptr is put in the new session structure (in which case the
2247         password will be freed at unmount time) */
2248 out:
2249         /* zero out password before freeing */
2250         if (volume_info.password != NULL) {
2251                 memset(volume_info.password, 0, strlen(volume_info.password));
2252                 kfree(volume_info.password);
2253         }
2254         kfree(volume_info.UNC);
2255         kfree(volume_info.prepath);
2256         FreeXid(xid);
2257         return rc;
2258 }
2259
2260 static int
2261 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2262               char session_key[CIFS_SESS_KEY_SIZE],
2263               const struct nls_table *nls_codepage)
2264 {
2265         struct smb_hdr *smb_buffer;
2266         struct smb_hdr *smb_buffer_response;
2267         SESSION_SETUP_ANDX *pSMB;
2268         SESSION_SETUP_ANDX *pSMBr;
2269         char *bcc_ptr;
2270         char *user;
2271         char *domain;
2272         int rc = 0;
2273         int remaining_words = 0;
2274         int bytes_returned = 0;
2275         int len;
2276         __u32 capabilities;
2277         __u16 count;
2278
2279         cFYI(1, ("In sesssetup"));
2280         if (ses == NULL)
2281                 return -EINVAL;
2282         user = ses->userName;
2283         domain = ses->domainName;
2284         smb_buffer = cifs_buf_get();
2285         if (smb_buffer == NULL) {
2286                 return -ENOMEM;
2287         }
2288         smb_buffer_response = smb_buffer;
2289         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2290
2291         /* send SMBsessionSetup here */
2292         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2293                         NULL /* no tCon exists yet */ , 13 /* wct */ );
2294
2295         smb_buffer->Mid = GetNextMid(ses->server);
2296         pSMB->req_no_secext.AndXCommand = 0xFF;
2297         pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2298         pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2299
2300         if (ses->server->secMode &
2301                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2302                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2303
2304         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2305                 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2306         if (ses->capabilities & CAP_UNICODE) {
2307                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2308                 capabilities |= CAP_UNICODE;
2309         }
2310         if (ses->capabilities & CAP_STATUS32) {
2311                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2312                 capabilities |= CAP_STATUS32;
2313         }
2314         if (ses->capabilities & CAP_DFS) {
2315                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2316                 capabilities |= CAP_DFS;
2317         }
2318         pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2319
2320         pSMB->req_no_secext.CaseInsensitivePasswordLength =
2321                 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2322
2323         pSMB->req_no_secext.CaseSensitivePasswordLength =
2324             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2325         bcc_ptr = pByteArea(smb_buffer);
2326         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2327         bcc_ptr += CIFS_SESS_KEY_SIZE;
2328         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2329         bcc_ptr += CIFS_SESS_KEY_SIZE;
2330
2331         if (ses->capabilities & CAP_UNICODE) {
2332                 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2333                         *bcc_ptr = 0;
2334                         bcc_ptr++;
2335                 }
2336                 if (user == NULL)
2337                         bytes_returned = 0; /* skip null user */
2338                 else
2339                         bytes_returned =
2340                                 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2341                                         nls_codepage);
2342                 /* convert number of 16 bit words to bytes */
2343                 bcc_ptr += 2 * bytes_returned;
2344                 bcc_ptr += 2;   /* trailing null */
2345                 if (domain == NULL)
2346                         bytes_returned =
2347                             cifs_strtoUCS((__le16 *) bcc_ptr,
2348                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2349                 else
2350                         bytes_returned =
2351                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2352                                           nls_codepage);
2353                 bcc_ptr += 2 * bytes_returned;
2354                 bcc_ptr += 2;
2355                 bytes_returned =
2356                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2357                                   32, nls_codepage);
2358                 bcc_ptr += 2 * bytes_returned;
2359                 bytes_returned =
2360                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release,
2361                                   32, nls_codepage);
2362                 bcc_ptr += 2 * bytes_returned;
2363                 bcc_ptr += 2;
2364                 bytes_returned =
2365                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2366                                   64, nls_codepage);
2367                 bcc_ptr += 2 * bytes_returned;
2368                 bcc_ptr += 2;
2369         } else {
2370                 if (user != NULL) {
2371                     strncpy(bcc_ptr, user, 200);
2372                     bcc_ptr += strnlen(user, 200);
2373                 }
2374                 *bcc_ptr = 0;
2375                 bcc_ptr++;
2376                 if (domain == NULL) {
2377                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2378                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2379                 } else {
2380                         strncpy(bcc_ptr, domain, 64);
2381                         bcc_ptr += strnlen(domain, 64);
2382                         *bcc_ptr = 0;
2383                         bcc_ptr++;
2384                 }
2385                 strcpy(bcc_ptr, "Linux version ");
2386                 bcc_ptr += strlen("Linux version ");
2387                 strcpy(bcc_ptr, utsname()->release);
2388                 bcc_ptr += strlen(utsname()->release) + 1;
2389                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2390                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2391         }
2392         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2393         smb_buffer->smb_buf_length += count;
2394         pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2395
2396         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2397                          &bytes_returned, CIFS_LONG_OP);
2398         if (rc) {
2399 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2400         } else if ((smb_buffer_response->WordCount == 3)
2401                    || (smb_buffer_response->WordCount == 4)) {
2402                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2403                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2404                 if (action & GUEST_LOGIN)
2405                         cFYI(1, (" Guest login")); /* BB mark SesInfo struct? */
2406                 ses->Suid = smb_buffer_response->Uid; /* UID left in wire format
2407                                                          (little endian) */
2408                 cFYI(1, ("UID = %d ", ses->Suid));
2409         /* response can have either 3 or 4 word count - Samba sends 3 */
2410                 bcc_ptr = pByteArea(smb_buffer_response);
2411                 if ((pSMBr->resp.hdr.WordCount == 3)
2412                     || ((pSMBr->resp.hdr.WordCount == 4)
2413                         && (blob_len < pSMBr->resp.ByteCount))) {
2414                         if (pSMBr->resp.hdr.WordCount == 4)
2415                                 bcc_ptr += blob_len;
2416
2417                         if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2418                                 if ((long) (bcc_ptr) % 2) {
2419                                         remaining_words =
2420                                             (BCC(smb_buffer_response) - 1) / 2;
2421                                         /* Unicode strings must be word
2422                                            aligned */
2423                                         bcc_ptr++;
2424                                 } else {
2425                                         remaining_words =
2426                                                 BCC(smb_buffer_response) / 2;
2427                                 }
2428                                 len =
2429                                     UniStrnlen((wchar_t *) bcc_ptr,
2430                                                remaining_words - 1);
2431 /* We look for obvious messed up bcc or strings in response so we do not go off
2432    the end since (at least) WIN2K and Windows XP have a major bug in not null
2433    terminating last Unicode string in response  */
2434                                 if (ses->serverOS)
2435                                         kfree(ses->serverOS);
2436                                 ses->serverOS = kzalloc(2 * (len + 1),
2437                                                         GFP_KERNEL);
2438                                 if (ses->serverOS == NULL)
2439                                         goto sesssetup_nomem;
2440                                 cifs_strfromUCS_le(ses->serverOS,
2441                                                    (__le16 *)bcc_ptr,
2442                                                    len, nls_codepage);
2443                                 bcc_ptr += 2 * (len + 1);
2444                                 remaining_words -= len + 1;
2445                                 ses->serverOS[2 * len] = 0;
2446                                 ses->serverOS[1 + (2 * len)] = 0;
2447                                 if (remaining_words > 0) {
2448                                         len = UniStrnlen((wchar_t *)bcc_ptr,
2449                                                          remaining_words-1);
2450                                         kfree(ses->serverNOS);
2451                                         ses->serverNOS = kzalloc(2 * (len + 1),
2452                                                                  GFP_KERNEL);
2453                                         if (ses->serverNOS == NULL)
2454                                                 goto sesssetup_nomem;
2455                                         cifs_strfromUCS_le(ses->serverNOS,
2456                                                            (__le16 *)bcc_ptr,
2457                                                            len, nls_codepage);
2458                                         bcc_ptr += 2 * (len + 1);
2459                                         ses->serverNOS[2 * len] = 0;
2460                                         ses->serverNOS[1 + (2 * len)] = 0;
2461                                         if (strncmp(ses->serverNOS,
2462                                                 "NT LAN Manager 4", 16) == 0) {
2463                                                 cFYI(1, ("NT4 server"));
2464                                                 ses->flags |= CIFS_SES_NT4;
2465                                         }
2466                                         remaining_words -= len + 1;
2467                                         if (remaining_words > 0) {
2468                                                 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2469                                 /* last string is not always null terminated
2470                                    (for e.g. for Windows XP & 2000) */
2471                                                 if (ses->serverDomain)
2472                                                         kfree(ses->serverDomain);
2473                                                 ses->serverDomain =
2474                                                     kzalloc(2*(len+1),
2475                                                             GFP_KERNEL);
2476                                                 if (ses->serverDomain == NULL)
2477                                                         goto sesssetup_nomem;
2478                                                 cifs_strfromUCS_le(ses->serverDomain,
2479                                                         (__le16 *)bcc_ptr,
2480                                                         len, nls_codepage);
2481                                                 bcc_ptr += 2 * (len + 1);
2482                                                 ses->serverDomain[2*len] = 0;
2483                                                 ses->serverDomain[1+(2*len)] = 0;
2484                                         } else { /* else no more room so create
2485                                                   dummy domain string */
2486                                                 if (ses->serverDomain)
2487                                                         kfree(ses->serverDomain);
2488                                                 ses->serverDomain =
2489                                                         kzalloc(2, GFP_KERNEL);
2490                                         }
2491                                 } else { /* no room so create dummy domain
2492                                             and NOS string */
2493
2494                                         /* if these kcallocs fail not much we
2495                                            can do, but better to not fail the
2496                                            sesssetup itself */
2497                                         kfree(ses->serverDomain);
2498                                         ses->serverDomain =
2499                                             kzalloc(2, GFP_KERNEL);
2500                                         kfree(ses->serverNOS);
2501                                         ses->serverNOS =
2502                                             kzalloc(2, GFP_KERNEL);
2503                                 }
2504                         } else {        /* ASCII */
2505                                 len = strnlen(bcc_ptr, 1024);
2506                                 if (((long) bcc_ptr + len) - (long)
2507                                     pByteArea(smb_buffer_response)
2508                                             <= BCC(smb_buffer_response)) {
2509                                         kfree(ses->serverOS);
2510                                         ses->serverOS = kzalloc(len + 1,
2511                                                                 GFP_KERNEL);
2512                                         if (ses->serverOS == NULL)
2513                                                 goto sesssetup_nomem;
2514                                         strncpy(ses->serverOS, bcc_ptr, len);
2515
2516                                         bcc_ptr += len;
2517                                         /* null terminate the string */
2518                                         bcc_ptr[0] = 0;
2519                                         bcc_ptr++;
2520
2521                                         len = strnlen(bcc_ptr, 1024);
2522                                         kfree(ses->serverNOS);
2523                                         ses->serverNOS = kzalloc(len + 1,
2524                                                                  GFP_KERNEL);
2525                                         if (ses->serverNOS == NULL)
2526                                                 goto sesssetup_nomem;
2527                                         strncpy(ses->serverNOS, bcc_ptr, len);
2528                                         bcc_ptr += len;
2529                                         bcc_ptr[0] = 0;
2530                                         bcc_ptr++;
2531
2532                                         len = strnlen(bcc_ptr, 1024);
2533                                         if (ses->serverDomain)
2534                                                 kfree(ses->serverDomain);
2535                                         ses->serverDomain = kzalloc(len + 1,
2536                                                                     GFP_KERNEL);
2537                                         if (ses->serverDomain == NULL)
2538                                                 goto sesssetup_nomem;
2539                                         strncpy(ses->serverDomain, bcc_ptr,
2540                                                 len);
2541                                         bcc_ptr += len;
2542                                         bcc_ptr[0] = 0;
2543                                         bcc_ptr++;
2544                                 } else
2545                                         cFYI(1,
2546                                              ("Variable field of length %d "
2547                                                 "extends beyond end of smb ",
2548                                               len));
2549                         }
2550                 } else {
2551                         cERROR(1,
2552                                (" Security Blob Length extends beyond "
2553                                 "end of SMB"));
2554                 }
2555         } else {
2556                 cERROR(1,
2557                        (" Invalid Word count %d: ",
2558                         smb_buffer_response->WordCount));
2559                 rc = -EIO;
2560         }
2561 sesssetup_nomem:        /* do not return an error on nomem for the info strings,
2562                            since that could make reconnection harder, and
2563                            reconnection might be needed to free memory */
2564         cifs_buf_release(smb_buffer);
2565
2566         return rc;
2567 }
2568
2569 static int
2570 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2571                               struct cifsSesInfo *ses, int *pNTLMv2_flag,
2572                               const struct nls_table *nls_codepage)
2573 {
2574         struct smb_hdr *smb_buffer;
2575         struct smb_hdr *smb_buffer_response;
2576         SESSION_SETUP_ANDX *pSMB;
2577         SESSION_SETUP_ANDX *pSMBr;
2578         char *bcc_ptr;
2579         char *domain;
2580         int rc = 0;
2581         int remaining_words = 0;
2582         int bytes_returned = 0;
2583         int len;
2584         int SecurityBlobLength = sizeof(NEGOTIATE_MESSAGE);
2585         PNEGOTIATE_MESSAGE SecurityBlob;
2586         PCHALLENGE_MESSAGE SecurityBlob2;
2587         __u32 negotiate_flags, capabilities;
2588         __u16 count;
2589
2590         cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
2591         if (ses == NULL)
2592                 return -EINVAL;
2593         domain = ses->domainName;
2594         *pNTLMv2_flag = FALSE;
2595         smb_buffer = cifs_buf_get();
2596         if (smb_buffer == NULL) {
2597                 return -ENOMEM;
2598         }
2599         smb_buffer_response = smb_buffer;
2600         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2601         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2602
2603         /* send SMBsessionSetup here */
2604         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2605                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2606
2607         smb_buffer->Mid = GetNextMid(ses->server);
2608         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2609         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2610
2611         pSMB->req.AndXCommand = 0xFF;
2612         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2613         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2614
2615         if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2616                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2617
2618         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2619             CAP_EXTENDED_SECURITY;
2620         if (ses->capabilities & CAP_UNICODE) {
2621                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2622                 capabilities |= CAP_UNICODE;
2623         }
2624         if (ses->capabilities & CAP_STATUS32) {
2625                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2626                 capabilities |= CAP_STATUS32;
2627         }
2628         if (ses->capabilities & CAP_DFS) {
2629                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2630                 capabilities |= CAP_DFS;
2631         }
2632         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2633
2634         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2635         SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2636         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2637         SecurityBlob->MessageType = NtLmNegotiate;
2638         negotiate_flags =
2639             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2640             NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
2641             NTLMSSP_NEGOTIATE_56 |
2642             /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2643         if (sign_CIFS_PDUs)
2644                 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2645 /*      if (ntlmv2_support)
2646                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;*/
2647         /* setup pointers to domain name and workstation name */
2648         bcc_ptr += SecurityBlobLength;
2649
2650         SecurityBlob->WorkstationName.Buffer = 0;
2651         SecurityBlob->WorkstationName.Length = 0;
2652         SecurityBlob->WorkstationName.MaximumLength = 0;
2653
2654         /* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
2655         along with username on auth request (ie the response to challenge) */
2656         SecurityBlob->DomainName.Buffer = 0;
2657         SecurityBlob->DomainName.Length = 0;
2658         SecurityBlob->DomainName.MaximumLength = 0;
2659         if (ses->capabilities & CAP_UNICODE) {
2660                 if ((long) bcc_ptr % 2) {
2661                         *bcc_ptr = 0;
2662                         bcc_ptr++;
2663                 }
2664
2665                 bytes_returned =
2666                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2667                                   32, nls_codepage);
2668                 bcc_ptr += 2 * bytes_returned;
2669                 bytes_returned =
2670                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
2671                                   nls_codepage);
2672                 bcc_ptr += 2 * bytes_returned;
2673                 bcc_ptr += 2;   /* null terminate Linux version */
2674                 bytes_returned =
2675                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2676                                   64, nls_codepage);
2677                 bcc_ptr += 2 * bytes_returned;
2678                 *(bcc_ptr + 1) = 0;
2679                 *(bcc_ptr + 2) = 0;
2680                 bcc_ptr += 2;   /* null terminate network opsys string */
2681                 *(bcc_ptr + 1) = 0;
2682                 *(bcc_ptr + 2) = 0;
2683                 bcc_ptr += 2;   /* null domain */
2684         } else {                /* ASCII */
2685                 strcpy(bcc_ptr, "Linux version ");
2686                 bcc_ptr += strlen("Linux version ");
2687                 strcpy(bcc_ptr, utsname()->release);
2688                 bcc_ptr += strlen(utsname()->release) + 1;
2689                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2690                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2691                 bcc_ptr++;      /* empty domain field */
2692                 *bcc_ptr = 0;
2693         }
2694         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2695         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2696         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2697         smb_buffer->smb_buf_length += count;
2698         pSMB->req.ByteCount = cpu_to_le16(count);
2699
2700         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2701                          &bytes_returned, CIFS_LONG_OP);
2702
2703         if (smb_buffer_response->Status.CifsError ==
2704             cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
2705                 rc = 0;
2706
2707         if (rc) {
2708 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2709         } else if ((smb_buffer_response->WordCount == 3)
2710                    || (smb_buffer_response->WordCount == 4)) {
2711                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2712                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2713
2714                 if (action & GUEST_LOGIN)
2715                         cFYI(1, (" Guest login"));
2716         /* Do we want to set anything in SesInfo struct when guest login? */
2717
2718                 bcc_ptr = pByteArea(smb_buffer_response);
2719         /* response can have either 3 or 4 word count - Samba sends 3 */
2720
2721                 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
2722                 if (SecurityBlob2->MessageType != NtLmChallenge) {
2723                         cFYI(1,
2724                              ("Unexpected NTLMSSP message type received %d",
2725                               SecurityBlob2->MessageType));
2726                 } else if (ses) {
2727                         ses->Suid = smb_buffer_response->Uid; /* UID left in le format */
2728                         cFYI(1, ("UID = %d", ses->Suid));
2729                         if ((pSMBr->resp.hdr.WordCount == 3)
2730                             || ((pSMBr->resp.hdr.WordCount == 4)
2731                                 && (blob_len <
2732                                     pSMBr->resp.ByteCount))) {
2733
2734                                 if (pSMBr->resp.hdr.WordCount == 4) {
2735                                         bcc_ptr += blob_len;
2736                                         cFYI(1, ("Security Blob Length %d",
2737                                               blob_len));
2738                                 }
2739
2740                                 cFYI(1, ("NTLMSSP Challenge rcvd"));
2741
2742                                 memcpy(ses->server->cryptKey,
2743                                        SecurityBlob2->Challenge,
2744                                        CIFS_CRYPTO_KEY_SIZE);
2745                                 if (SecurityBlob2->NegotiateFlags &
2746                                         cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
2747                                         *pNTLMv2_flag = TRUE;
2748
2749                                 if ((SecurityBlob2->NegotiateFlags &
2750                                         cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN))
2751                                         || (sign_CIFS_PDUs > 1))
2752                                                 ses->server->secMode |=
2753                                                         SECMODE_SIGN_REQUIRED;
2754                                 if ((SecurityBlob2->NegotiateFlags &
2755                                         cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
2756                                                 ses->server->secMode |=
2757                                                         SECMODE_SIGN_ENABLED;
2758
2759                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2760                                         if ((long) (bcc_ptr) % 2) {
2761                                                 remaining_words =
2762                                                     (BCC(smb_buffer_response)
2763<