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   1 /*
   2  *   fs/cifs/connect.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2006
   5  *   Author(s): Steve French (sfrench@us.ibm.com)
   6  *
   7  *   This library is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU Lesser General Public License as published
   9  *   by the Free Software Foundation; either version 2.1 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This library is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  15  *   the GNU Lesser General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU Lesser General Public License
  18  *   along with this library; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21 #include <linux/fs.h>
  22 #include <linux/net.h>
  23 #include <linux/string.h>
  24 #include <linux/list.h>
  25 #include <linux/wait.h>
  26 #include <linux/ipv6.h>
  27 #include <linux/pagemap.h>
  28 #include <linux/ctype.h>
  29 #include <linux/utsname.h>
  30 #include <linux/mempool.h>
  31 #include <linux/delay.h>
  32 #include <linux/completion.h>
  33 #include <linux/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 sfu_emul:1;
  89         unsigned nullauth:1; /* attempt to authenticate with null user */
  90         unsigned nocase;     /* request case insensitive filenames */
  91         unsigned nobrl;      /* disable sending byte range locks to srv */
  92         unsigned int rsize;
  93         unsigned int wsize;
  94         unsigned int sockopt;
  95         unsigned short int port;
  96         char * prepath;
  97 };
  98
  99 static int ipv4_connect(struct sockaddr_in *psin_server,
 100                         struct socket **csocket,
 101                         char * netb_name,
 102                         char * server_netb_name);
 103 static int ipv6_connect(struct sockaddr_in6 *psin_server,
 104                         struct socket **csocket);
 105
 106
 107         /*
 108          * cifs tcp session reconnection
 109          *
 110          * mark tcp session as reconnecting so temporarily locked
 111          * mark all smb sessions as reconnecting for tcp session
 112          * reconnect tcp session
 113          * wake up waiters on reconnection? - (not needed currently)
 114          */
 115
 116 static int
 117 cifs_reconnect(struct TCP_Server_Info *server)
 118 {
 119         int rc = 0;
 120         struct list_head *tmp;
 121         struct cifsSesInfo *ses;
 122         struct cifsTconInfo *tcon;
 123         struct mid_q_entry * mid_entry;
 124
 125         spin_lock(&GlobalMid_Lock);
 126         if( kthread_should_stop() ) {
 127                 /* the demux thread will exit normally
 128                 next time through the loop */
 129                 spin_unlock(&GlobalMid_Lock);
 130                 return rc;
 131         } else
 132                 server->tcpStatus = CifsNeedReconnect;
 133         spin_unlock(&GlobalMid_Lock);
 134         server->maxBuf = 0;
 135
 136         cFYI(1, ("Reconnecting tcp session"));
 137
 138         /* before reconnecting the tcp session, mark the smb session (uid)
 139                 and the tid bad so they are not used until reconnected */
 140         read_lock(&GlobalSMBSeslock);
 141         list_for_each(tmp, &GlobalSMBSessionList) {
 142                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
 143                 if (ses->server) {
 144                         if (ses->server == server) {
 145                                 ses->status = CifsNeedReconnect;
 146                                 ses->ipc_tid = 0;
 147                         }
 148                 }
 149                 /* else tcp and smb sessions need reconnection */
 150         }
 151         list_for_each(tmp, &GlobalTreeConnectionList) {
 152                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
 153                 if((tcon) && (tcon->ses) && (tcon->ses->server == server)) {
 154                         tcon->tidStatus = CifsNeedReconnect;
 155                 }
 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                 server->ssocket->ops->shutdown(server->ssocket,SEND_SHUTDOWN);
 164                 cFYI(1,("Post shutdown state: 0x%x Flags: 0x%lx", server->ssocket->state,
 165                         server->ssocket->flags));
 166                 sock_release(server->ssocket);
 167                 server->ssocket = NULL;
 168         }
 169
 170         spin_lock(&GlobalMid_Lock);
 171         list_for_each(tmp, &server->pending_mid_q) {
 172                 mid_entry = list_entry(tmp, struct
 173                                         mid_q_entry,
 174                                         qhead);
 175                 if(mid_entry) {
 176                         if(mid_entry->midState == MID_REQUEST_SUBMITTED) {
 177                                 /* Mark other intransit requests as needing
 178                                    retry so we do not immediately mark the
 179                                    session bad again (ie after we reconnect
 180                                    below) as they timeout too */
 181                                 mid_entry->midState = MID_RETRY_NEEDED;
 182                         }
 183                 }
 184         }
 185         spin_unlock(&GlobalMid_Lock);
 186         up(&server->tcpSem);
 187
 188         while ( (!kthread_should_stop()) && (server->tcpStatus != CifsGood))
 189         {
 190                 try_to_freeze();
 191                 if(server->protocolType == IPV6) {
 192                         rc = ipv6_connect(&server->addr.sockAddr6,&server->ssocket);
 193                 } else {
 194                         rc = ipv4_connect(&server->addr.sockAddr,
 195                                         &server->ssocket,
 196                                         server->workstation_RFC1001_name,
 197                                         server->server_RFC1001_name);
 198                 }
 199                 if(rc) {
 200                         cFYI(1,("reconnect error %d",rc));
 201                         msleep(3000);
 202                 } else {
 203                         atomic_inc(&tcpSesReconnectCount);
 204                         spin_lock(&GlobalMid_Lock);
 205                         if( !kthread_should_stop() )
 206                                 server->tcpStatus = CifsGood;
 207                         server->sequence_number = 0;
 208                         spin_unlock(&GlobalMid_Lock);
 209         /*              atomic_set(&server->inFlight,0);*/
 210                         wake_up(&server->response_q);
 211                 }
 212         }
 213         return rc;
 214 }
 215
 216 /*
 217         return codes:
 218                 0       not a transact2, or all data present
 219                 >0      transact2 with that much data missing
 220                 -EINVAL = invalid transact2
 221
 222  */
 223 static int check2ndT2(struct smb_hdr * pSMB, unsigned int maxBufSize)
 224 {
 225         struct smb_t2_rsp * pSMBt;
 226         int total_data_size;
 227         int data_in_this_rsp;
 228         int remaining;
 229
 230         if(pSMB->Command != SMB_COM_TRANSACTION2)
 231                 return 0;
 232
 233         /* check for plausible wct, bcc and t2 data and parm sizes */
 234         /* check for parm and data offset going beyond end of smb */
 235         if(pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
 236                 cFYI(1,("invalid transact2 word count"));
 237                 return -EINVAL;
 238         }
 239
 240         pSMBt = (struct smb_t2_rsp *)pSMB;
 241
 242         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 243         data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 244
 245         remaining = total_data_size - data_in_this_rsp;
 246
 247         if(remaining == 0)
 248                 return 0;
 249         else if(remaining < 0) {
 250                 cFYI(1,("total data %d smaller than data in frame %d",
 251                         total_data_size, data_in_this_rsp));
 252                 return -EINVAL;
 253         } else {
 254                 cFYI(1,("missing %d bytes from transact2, check next response",
 255                         remaining));
 256                 if(total_data_size > maxBufSize) {
 257                         cERROR(1,("TotalDataSize %d is over maximum buffer %d",
 258                                 total_data_size,maxBufSize));
 259                         return -EINVAL;
 260                 }
 261                 return remaining;
 262         }
 263 }
 264
 265 static int coalesce_t2(struct smb_hdr * psecond, struct smb_hdr *pTargetSMB)
 266 {
 267         struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
 268         struct smb_t2_rsp *pSMBt  = (struct smb_t2_rsp *)pTargetSMB;
 269         int total_data_size;
 270         int total_in_buf;
 271         int remaining;
 272         int total_in_buf2;
 273         char * data_area_of_target;
 274         char * data_area_of_buf2;
 275         __u16 byte_count;
 276
 277         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 278
 279         if(total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
 280                 cFYI(1,("total data sizes of primary and secondary t2 differ"));
 281         }
 282
 283         total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 284
 285         remaining = total_data_size - total_in_buf;
 286
 287         if(remaining < 0)
 288                 return -EINVAL;
 289
 290         if(remaining == 0) /* nothing to do, ignore */
 291                 return 0;
 292
 293         total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
 294         if(remaining < total_in_buf2) {
 295                 cFYI(1,("transact2 2nd response contains too much data"));
 296         }
 297
 298         /* find end of first SMB data area */
 299         data_area_of_target = (char *)&pSMBt->hdr.Protocol +
 300                                 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
 301         /* validate target area */
 302
 303         data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
 304                                         le16_to_cpu(pSMB2->t2_rsp.DataOffset);
 305
 306         data_area_of_target += total_in_buf;
 307
 308         /* copy second buffer into end of first buffer */
 309         memcpy(data_area_of_target,data_area_of_buf2,total_in_buf2);
 310         total_in_buf += total_in_buf2;
 311         pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
 312         byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
 313         byte_count += total_in_buf2;
 314         BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
 315
 316         byte_count = pTargetSMB->smb_buf_length;
 317         byte_count += total_in_buf2;
 318
 319         /* BB also add check that we are not beyond maximum buffer size */
 320
 321         pTargetSMB->smb_buf_length = byte_count;
 322
 323         if(remaining == total_in_buf2) {
 324                 cFYI(1,("found the last secondary response"));
 325                 return 0; /* we are done */
 326         } else /* more responses to go */
 327                 return 1;
 328
 329 }
 330
 331 static int
 332 cifs_demultiplex_thread(struct TCP_Server_Info *server)
 333 {
 334         int length;
 335         unsigned int pdu_length, total_read;
 336         struct smb_hdr *smb_buffer = NULL;
 337         struct smb_hdr *bigbuf = NULL;
 338         struct smb_hdr *smallbuf = NULL;
 339         struct msghdr smb_msg;
 340         struct kvec iov;
 341         struct socket *csocket = server->ssocket;
 342         struct list_head *tmp;
 343         struct cifsSesInfo *ses;
 344         struct task_struct *task_to_wake = NULL;
 345         struct mid_q_entry *mid_entry;
 346         char temp;
 347         int isLargeBuf = FALSE;
 348         int isMultiRsp;
 349         int reconnect;
 350
 351         allow_signal(SIGKILL);
 352         current->flags |= PF_MEMALLOC;
 353         server->tsk = current;  /* save process info to wake at shutdown */
 354         cFYI(1, ("Demultiplex PID: %d", current->pid));
 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,
 362                         length + cifs_min_rcv,
 363                         GFP_KERNEL);
 364         }
 365
 366         while (!kthread_should_stop()) {
 367                 if (try_to_freeze())
 368                         continue;
 369                 if (bigbuf == NULL) {
 370                         bigbuf = cifs_buf_get();
 371                         if (!bigbuf) {
 372                                 cERROR(1, ("No memory for large SMB response"));
 373                                 msleep(3000);
 374                                 /* retry will check if exiting */
 375                                 continue;
 376                         }
 377                 } else if (isLargeBuf) {
 378                         /* we are reusing a dirty large buf, clear its start */
 379                         memset(bigbuf, 0, sizeof (struct smb_hdr));
 380                 }
 381
 382                 if (smallbuf == NULL) {
 383                         smallbuf = cifs_small_buf_get();
 384                         if (!smallbuf) {
 385                                 cERROR(1, ("No memory for SMB response"));
 386                                 msleep(1000);
 387                                 /* retry will check if exiting */
 388                                 continue;
 389                         }
 390                         /* beginning of smb buffer is cleared in our buf_get */
 391                 } else /* if existing small buf clear beginning */
 392                         memset(smallbuf, 0, sizeof (struct smb_hdr));
 393
 394                 isLargeBuf = FALSE;
 395                 isMultiRsp = FALSE;
 396                 smb_buffer = smallbuf;
 397                 iov.iov_base = smb_buffer;
 398                 iov.iov_len = 4;
 399                 smb_msg.msg_control = NULL;
 400                 smb_msg.msg_controllen = 0;
 401                 length =
 402                     kernel_recvmsg(csocket, &smb_msg,
 403                                  &iov, 1, 4, 0 /* BB see socket.h flags */);
 404
 405                 if ( kthread_should_stop() ) {
 406                         break;
 407                 } else if (server->tcpStatus == CifsNeedReconnect) {
 408                         cFYI(1, ("Reconnect after server stopped responding"));
 409                         cifs_reconnect(server);
 410                         cFYI(1, ("call to reconnect done"));
 411                         csocket = server->ssocket;
 412                         continue;
 413                 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
 414                         msleep(1); /* minimum sleep to prevent looping
 415                                 allowing socket to clear and app threads to set
 416                                 tcpStatus CifsNeedReconnect if server hung */
 417                         continue;
 418                 } else if (length <= 0) {
 419                         if (server->tcpStatus == CifsNew) {
 420                                 cFYI(1, ("tcp session abend after SMBnegprot"));
 421                                 /* some servers kill the TCP session rather than
 422                                    returning an SMB negprot error, in which
 423                                    case reconnecting here is not going to help,
 424                                    and so simply return error to mount */
 425                                 break;
 426                         }
 427                         if (!try_to_freeze() && (length == -EINTR)) {
 428                                 cFYI(1,("cifsd thread killed"));
 429                                 break;
 430                         }
 431                         cFYI(1,("Reconnect after unexpected peek error %d",
 432                                 length));
 433                         cifs_reconnect(server);
 434                         csocket = server->ssocket;
 435                         wake_up(&server->response_q);
 436                         continue;
 437                 } else if (length < 4) {
 438                         cFYI(1,
 439                             ("Frame under four bytes received (%d bytes long)",
 440                               length));
 441                         cifs_reconnect(server);
 442                         csocket = server->ssocket;
 443                         wake_up(&server->response_q);
 444                         continue;
 445                 }
 446
 447                 /* The right amount was read from socket - 4 bytes */
 448                 /* so we can now interpret the length field */
 449
 450                 /* the first byte big endian of the length field,
 451                 is actually not part of the length but the type
 452                 with the most common, zero, as regular data */
 453                 temp = *((char *) smb_buffer);
 454
 455                 /* Note that FC 1001 length is big endian on the wire,
 456                 but we convert it here so it is always manipulated
 457                 as host byte order */
 458                 pdu_length = ntohl(smb_buffer->smb_buf_length);
 459                 smb_buffer->smb_buf_length = pdu_length;
 460
 461                 cFYI(1,("rfc1002 length 0x%x)", pdu_length+4));
 462
 463                 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
 464                         continue;
 465                 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
 466                         cFYI(1,("Good RFC 1002 session rsp"));
 467                         continue;
 468                 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
 469                         /* we get this from Windows 98 instead of
 470                            an error on SMB negprot response */
 471                         cFYI(1,("Negative RFC1002 Session Response Error 0x%x)",
 472                                 pdu_length));
 473                         if(server->tcpStatus == CifsNew) {
 474                                 /* if nack on negprot (rather than
 475                                 ret of smb negprot error) reconnecting
 476                                 not going to help, ret error to mount */
 477                                 break;
 478                         } else {
 479                                 /* give server a second to
 480                                 clean up before reconnect attempt */
 481                                 msleep(1000);
 482                                 /* always try 445 first on reconnect
 483                                 since we get NACK on some if we ever
 484                                 connected to port 139 (the NACK is
 485                                 since we do not begin with RFC1001
 486                                 session initialize frame) */
 487                                 server->addr.sockAddr.sin_port =
 488                                         htons(CIFS_PORT);
 489                                 cifs_reconnect(server);
 490                                 csocket = server->ssocket;
 491                                 wake_up(&server->response_q);
 492                                 continue;
 493                         }
 494                 } else if (temp != (char) 0) {
 495                         cERROR(1,("Unknown RFC 1002 frame"));
 496                         cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
 497                                       length);
 498                         cifs_reconnect(server);
 499                         csocket = server->ssocket;
 500                         continue;
 501                 }
 502
 503                 /* else we have an SMB response */
 504                 if((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
 505                             (pdu_length < sizeof (struct smb_hdr) - 1 - 4)) {
 506                         cERROR(1, ("Invalid size SMB length %d pdu_length %d",
 507                                         length, pdu_length+4));
 508                         cifs_reconnect(server);
 509                         csocket = server->ssocket;
 510                         wake_up(&server->response_q);
 511                         continue;
 512                 }
 513
 514                 /* else length ok */
 515                 reconnect = 0;
 516
 517                 if(pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
 518                         isLargeBuf = TRUE;
 519                         memcpy(bigbuf, smallbuf, 4);
 520                         smb_buffer = bigbuf;
 521                 }
 522                 length = 0;
 523                 iov.iov_base = 4 + (char *)smb_buffer;
 524                 iov.iov_len = pdu_length;
 525                 for (total_read = 0; total_read < pdu_length;
 526                      total_read += length) {
 527                         length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
 528                                                 pdu_length - total_read, 0);
 529                         if( kthread_should_stop() ||
 530                             (length == -EINTR)) {
 531                                 /* then will exit */
 532                                 reconnect = 2;
 533                                 break;
 534                         } else if (server->tcpStatus == CifsNeedReconnect) {
 535                                 cifs_reconnect(server);
 536                                 csocket = server->ssocket;
 537                                 /* Reconnect wakes up rspns q */
 538                                 /* Now we will reread sock */
 539                                 reconnect = 1;
 540                                 break;
 541                         } else if ((length == -ERESTARTSYS) ||
 542                                    (length == -EAGAIN)) {
 543                                 msleep(1); /* minimum sleep to prevent looping,
 544                                               allowing socket to clear and app
 545                                               threads to set tcpStatus
 546                                               CifsNeedReconnect if server hung*/
 547                                 continue;
 548                         } else if (length <= 0) {
 549                                 cERROR(1,("Received no data, expecting %d",
 550                                               pdu_length - total_read));
 551                                 cifs_reconnect(server);
 552                                 csocket = server->ssocket;
 553                                 reconnect = 1;
 554                                 break;
 555                         }
 556                 }
 557                 if(reconnect == 2)
 558                         break;
 559                 else if(reconnect == 1)
 560                         continue;
 561
 562                 length += 4; /* account for rfc1002 hdr */
 563
 564
 565                 dump_smb(smb_buffer, length);
 566                 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
 567                         cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
 568                         continue;
 569                 }
 570
 571
 572                 task_to_wake = NULL;
 573                 spin_lock(&GlobalMid_Lock);
 574                 list_for_each(tmp, &server->pending_mid_q) {
 575                         mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 576
 577                         if ((mid_entry->mid == smb_buffer->Mid) &&
 578                             (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
 579                             (mid_entry->command == smb_buffer->Command)) {
 580                                 if(check2ndT2(smb_buffer,server->maxBuf) > 0) {
 581                                         /* We have a multipart transact2 resp */
 582                                         isMultiRsp = TRUE;
 583                                         if(mid_entry->resp_buf) {
 584                                                 /* merge response - fix up 1st*/
 585                                                 if(coalesce_t2(smb_buffer,
 586                                                         mid_entry->resp_buf)) {
 587                                                         mid_entry->multiRsp = 1;
 588                                                         break;
 589                                                 } else {
 590                                                         /* all parts received */
 591                                                         mid_entry->multiEnd = 1;
 592                                                         goto multi_t2_fnd;
 593                                                 }
 594                                         } else {
 595                                                 if(!isLargeBuf) {
 596                                                         cERROR(1,("1st trans2 resp needs bigbuf"));
 597                                         /* BB maybe we can fix this up,  switch
 598                                            to already allocated large buffer? */
 599                                                 } else {
 600                                                         /* Have first buffer */
 601                                                         mid_entry->resp_buf =
 602                                                                  smb_buffer;
 603                                                         mid_entry->largeBuf = 1;
 604                                                         bigbuf = NULL;
 605                                                 }
 606                                         }
 607                                         break;
 608                                 }
 609                                 mid_entry->resp_buf = smb_buffer;
 610                                 if(isLargeBuf)
 611                                         mid_entry->largeBuf = 1;
 612                                 else
 613                                         mid_entry->largeBuf = 0;
 614 multi_t2_fnd:
 615                                 task_to_wake = mid_entry->tsk;
 616                                 mid_entry->midState = MID_RESPONSE_RECEIVED;
 617 #ifdef CONFIG_CIFS_STATS2
 618                                 mid_entry->when_received = jiffies;
 619 #endif
 620                                 /* so we do not time out requests to  server
 621                                 which is still responding (since server could
 622                                 be busy but not dead) */
 623                                 server->lstrp = jiffies;
 624                                 break;
 625                         }
 626                 }
 627                 spin_unlock(&GlobalMid_Lock);
 628                 if (task_to_wake) {
 629                         /* Was previous buf put in mpx struct for multi-rsp? */
 630                         if(!isMultiRsp) {
 631                                 /* smb buffer will be freed by user thread */
 632                                 if(isLargeBuf) {
 633                                         bigbuf = NULL;
 634                                 } else
 635                                         smallbuf = NULL;
 636                         }
 637                         wake_up_process(task_to_wake);
 638                 } else if ((is_valid_oplock_break(smb_buffer, server) == FALSE)
 639                     && (isMultiRsp == FALSE)) {
 640                         cERROR(1, ("No task to wake, unknown frame rcvd! NumMids %d", midCount.counter));
 641                         cifs_dump_mem("Received Data is: ",(char *)smb_buffer,
 642                                       sizeof(struct smb_hdr));
 643 #ifdef CONFIG_CIFS_DEBUG2
 644                         cifs_dump_detail(smb_buffer);
 645                         cifs_dump_mids(server);
 646 #endif /* CIFS_DEBUG2 */
 647
 648                 }
 649         } /* end while !EXITING */
 650
 651         spin_lock(&GlobalMid_Lock);
 652         server->tcpStatus = CifsExiting;
 653         server->tsk = NULL;
 654         /* check if we have blocked requests that need to free */
 655         /* Note that cifs_max_pending is normally 50, but
 656         can be set at module install time to as little as two */
 657         if(atomic_read(&server->inFlight) >= cifs_max_pending)
 658                 atomic_set(&server->inFlight, cifs_max_pending - 1);
 659         /* We do not want to set the max_pending too low or we
 660         could end up with the counter going negative */
 661         spin_unlock(&GlobalMid_Lock);
 662         /* Although there should not be any requests blocked on
 663         this queue it can not hurt to be paranoid and try to wake up requests
 664         that may haven been blocked when more than 50 at time were on the wire
 665         to the same server - they now will see the session is in exit state
 666         and get out of SendReceive.  */
 667         wake_up_all(&server->request_q);
 668         /* give those requests time to exit */
 669         msleep(125);
 670
 671         if(server->ssocket) {
 672                 sock_release(csocket);
 673                 server->ssocket = NULL;
 674         }
 675         /* buffer usuallly freed in free_mid - need to free it here on exit */
 676         if (bigbuf != NULL)
 677                 cifs_buf_release(bigbuf);
 678         if (smallbuf != NULL)
 679                 cifs_small_buf_release(smallbuf);
 680
 681         read_lock(&GlobalSMBSeslock);
 682         if (list_empty(&server->pending_mid_q)) {
 683                 /* loop through server session structures attached to this and
 684                     mark them dead */
 685                 list_for_each(tmp, &GlobalSMBSessionList) {
 686                         ses =
 687                             list_entry(tmp, struct cifsSesInfo,
 688                                        cifsSessionList);
 689                         if (ses->server == server) {
 690                                 ses->status = CifsExiting;
 691                                 ses->server = NULL;
 692                         }
 693                 }
 694                 read_unlock(&GlobalSMBSeslock);
 695         } else {
 696                 /* although we can not zero the server struct pointer yet,
 697                 since there are active requests which may depnd on them,
 698                 mark the corresponding SMB sessions as exiting too */
 699                 list_for_each(tmp, &GlobalSMBSessionList) {
 700                         ses = list_entry(tmp, struct cifsSesInfo,
 701                                          cifsSessionList);
 702                         if (ses->server == server) {
 703                                 ses->status = CifsExiting;
 704                         }
 705                 }
 706
 707                 spin_lock(&GlobalMid_Lock);
 708                 list_for_each(tmp, &server->pending_mid_q) {
 709                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 710                         if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
 711                                 cFYI(1,
 712                                   ("Clearing Mid 0x%x - waking up ",mid_entry->mid));
 713                                 task_to_wake = mid_entry->tsk;
 714                                 if(task_to_wake) {
 715                                         wake_up_process(task_to_wake);
 716                                 }
 717                         }
 718                 }
 719                 spin_unlock(&GlobalMid_Lock);
 720                 read_unlock(&GlobalSMBSeslock);
 721                 /* 1/8th of sec is more than enough time for them to exit */
 722                 msleep(125);
 723         }
 724
 725         if (!list_empty(&server->pending_mid_q)) {
 726                 /* mpx threads have not exited yet give them
 727                 at least the smb send timeout time for long ops */
 728                 /* due to delays on oplock break requests, we need
 729                 to wait at least 45 seconds before giving up
 730                 on a request getting a response and going ahead
 731                 and killing cifsd */
 732                 cFYI(1, ("Wait for exit from demultiplex thread"));
 733                 msleep(46000);
 734                 /* if threads still have not exited they are probably never
 735                 coming home not much else we can do but free the memory */
 736         }
 737
 738         write_lock(&GlobalSMBSeslock);
 739         atomic_dec(&tcpSesAllocCount);
 740         length = tcpSesAllocCount.counter;
 741
 742         /* last chance to mark ses pointers invalid
 743         if there are any pointing to this (e.g
 744         if a crazy root user tried to kill cifsd
 745         kernel thread explicitly this might happen) */
 746         list_for_each(tmp, &GlobalSMBSessionList) {
 747                 ses = list_entry(tmp, struct cifsSesInfo,
 748                                 cifsSessionList);
 749                 if (ses->server == server) {
 750                         ses->server = NULL;
 751                 }
 752         }
 753         write_unlock(&GlobalSMBSeslock);
 754
 755         kfree(server);
 756         if(length  > 0) {
 757                 mempool_resize(cifs_req_poolp,
 758                         length + cifs_min_rcv,
 759                         GFP_KERNEL);
 760         }
 761
 762         return 0;
 763 }
 764
 765 static int
 766 cifs_parse_mount_options(char *options, const char *devname,struct smb_vol *vol)
 767 {
 768         char *value;
 769         char *data;
 770         unsigned int  temp_len, i, j;
 771         char separator[2];
 772
 773         separator[0] = ',';
 774         separator[1] = 0;
 775
 776         if (Local_System_Name[0] != 0)
 777                 memcpy(vol->source_rfc1001_name, Local_System_Name,15);
 778         else {
 779                 char *nodename = utsname()->nodename;
 780                 int n = strnlen(nodename,15);
 781                 memset(vol->source_rfc1001_name,0x20,15);
 782                 for(i=0 ; i < n ; i++) {
 783                         /* does not have to be perfect mapping since field is
 784                         informational, only used for servers that do not support
 785                         port 445 and it can be overridden at mount time */
 786                         vol->source_rfc1001_name[i] = toupper(nodename[i]);
 787                 }
 788         }
 789         vol->source_rfc1001_name[15] = 0;
 790         /* null target name indicates to use *SMBSERVR default called name
 791            if we end up sending RFC1001 session initialize */
 792         vol->target_rfc1001_name[0] = 0;
 793         vol->linux_uid = current->uid;  /* current->euid instead? */
 794         vol->linux_gid = current->gid;
 795         vol->dir_mode = S_IRWXUGO;
 796         /* 2767 perms indicate mandatory locking support */
 797         vol->file_mode = S_IALLUGO & ~(S_ISUID | S_IXGRP);
 798
 799         /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
 800         vol->rw = TRUE;
 801         /* default is always to request posix paths. */
 802         vol->posix_paths = 1;
 803
 804         if (!options)
 805                 return 1;
 806
 807         if(strncmp(options,"sep=",4) == 0) {
 808                 if(options[4] != 0) {
 809                         separator[0] = options[4];
 810                         options += 5;
 811                 } else {
 812                         cFYI(1,("Null separator not allowed"));
 813                 }
 814         }
 815
 816         while ((data = strsep(&options, separator)) != NULL) {
 817                 if (!*data)
 818                         continue;
 819                 if ((value = strchr(data, '=')) != NULL)
 820                         *value++ = '\0';
 821
 822                 if (strnicmp(data, "user_xattr",10) == 0) {/*parse before user*/
 823                         vol->no_xattr = 0;
 824                 } else if (strnicmp(data, "nouser_xattr",12) == 0) {
 825                         vol->no_xattr = 1;
 826                 } else if (strnicmp(data, "user", 4) == 0) {
 827                         if (!value) {
 828                                 printk(KERN_WARNING
 829                                        "CIFS: invalid or missing username\n");
 830                                 return 1;       /* needs_arg; */
 831                         } else if(!*value) {
 832                                 /* null user, ie anonymous, authentication */
 833                                 vol->nullauth = 1;
 834                         }
 835                         if (strnlen(value, 200) < 200) {
 836                                 vol->username = value;
 837                         } else {
 838                                 printk(KERN_WARNING "CIFS: username too long\n");
 839                                 return 1;
 840                         }
 841                 } else if (strnicmp(data, "pass", 4) == 0) {
 842                         if (!value) {
 843                                 vol->password = NULL;
 844                                 continue;
 845                         } else if(value[0] == 0) {
 846                                 /* check if string begins with double comma
 847                                    since that would mean the password really
 848                                    does start with a comma, and would not
 849                                    indicate an empty string */
 850                                 if(value[1] != separator[0]) {
 851                                         vol->password = NULL;
 852                                         continue;
 853                                 }
 854                         }
 855                         temp_len = strlen(value);
 856                         /* removed password length check, NTLM passwords
 857                                 can be arbitrarily long */
 858
 859                         /* if comma in password, the string will be
 860                         prematurely null terminated.  Commas in password are
 861                         specified across the cifs mount interface by a double
 862                         comma ie ,, and a comma used as in other cases ie ','
 863                         as a parameter delimiter/separator is single and due
 864                         to the strsep above is temporarily zeroed. */
 865
 866                         /* NB: password legally can have multiple commas and
 867                         the only illegal character in a password is null */
 868
 869                         if ((value[temp_len] == 0) &&
 870                             (value[temp_len+1] == separator[0])) {
 871                                 /* reinsert comma */
 872                                 value[temp_len] = separator[0];
 873                                 temp_len+=2;  /* move after the second comma */
 874                                 while(value[temp_len] != 0)  {
 875                                         if (value[temp_len] == separator[0]) {
 876                                                 if (value[temp_len+1] ==
 877                                                      separator[0]) {
 878                                                 /* skip second comma */
 879                                                         temp_len++;
 880                                                 } else {
 881                                                 /* single comma indicating start
 882                                                          of next parm */
 883                                                         break;
 884                                                 }
 885                                         }
 886                                         temp_len++;
 887                                 }
 888                                 if(value[temp_len] == 0) {
 889                                         options = NULL;
 890                                 } else {
 891                                         value[temp_len] = 0;
 892                                         /* point option to start of next parm */
 893                                         options = value + temp_len + 1;
 894                                 }
 895                                 /* go from value to value + temp_len condensing
 896                                 double commas to singles. Note that this ends up
 897                                 allocating a few bytes too many, which is ok */
 898                                 vol->password = kzalloc(temp_len, GFP_KERNEL);
 899                                 if(vol->password == NULL) {
 900                                         printk("CIFS: no memory for pass\n");
 901                                         return 1;
 902                                 }
 903                                 for(i=0,j=0;i<temp_len;i++,j++) {
 904                                         vol->password[j] = value[i];
 905                                         if(value[i] == separator[0]
 906                                                 && value[i+1] == separator[0]) {
 907                                                 /* skip second comma */
 908                                                 i++;
 909                                         }
 910                                 }
 911                                 vol->password[j] = 0;
 912                         } else {
 913                                 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
 914                                 if(vol->password == NULL) {
 915                                         printk("CIFS: no memory for pass\n");
 916                                         return 1;
 917                                 }
 918                                 strcpy(vol->password, value);
 919                         }
 920                 } else if (strnicmp(data, "ip", 2) == 0) {
 921                         if (!value || !*value) {
 922                                 vol->UNCip = NULL;
 923                         } else if (strnlen(value, 35) < 35) {
 924                                 vol->UNCip = value;
 925                         } else {
 926                                 printk(KERN_WARNING "CIFS: ip address too long\n");
 927                                 return 1;
 928                         }
 929                 } else if (strnicmp(data, "sec", 3) == 0) {
 930                         if (!value || !*value) {
 931                                 cERROR(1,("no security value specified"));
 932                                 continue;
 933                         } else if (strnicmp(value, "krb5i", 5) == 0) {
 934                                 vol->secFlg |= CIFSSEC_MAY_KRB5 |
 935                                         CIFSSEC_MUST_SIGN;
 936                         } else if (strnicmp(value, "krb5p", 5) == 0) {
 937                                 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
 938                                         CIFSSEC_MAY_KRB5; */
 939                                 cERROR(1,("Krb5 cifs privacy not supported"));
 940                                 return 1;
 941                         } else if (strnicmp(value, "krb5", 4) == 0) {
 942                                 vol->secFlg |= CIFSSEC_MAY_KRB5;
 943                         } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
 944                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
 945                                         CIFSSEC_MUST_SIGN;
 946                         } else if (strnicmp(value, "ntlmv2", 6) == 0) {
 947                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
 948                         } else if (strnicmp(value, "ntlmi", 5) == 0) {
 949                                 vol->secFlg |= CIFSSEC_MAY_NTLM |
 950                                         CIFSSEC_MUST_SIGN;
 951                         } else if (strnicmp(value, "ntlm", 4) == 0) {
 952                                 /* ntlm is default so can be turned off too */
 953                                 vol->secFlg |= CIFSSEC_MAY_NTLM;
 954                         } else if (strnicmp(value, "nontlm", 6) == 0) {
 955                                 /* BB is there a better way to do this? */
 956                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
 957 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 958                         } else if (strnicmp(value, "lanman", 6) == 0) {
 959                                 vol->secFlg |= CIFSSEC_MAY_LANMAN;
 960 #endif
 961                         } else if (strnicmp(value, "none", 4) == 0) {
 962                                 vol->nullauth = 1;
 963                         } else {
 964                                 cERROR(1,("bad security option: %s", value));
 965                                 return 1;
 966                         }
 967                 } else if ((strnicmp(data, "unc", 3) == 0)
 968                            || (strnicmp(data, "target", 6) == 0)
 969                            || (strnicmp(data, "path", 4) == 0)) {
 970                         if (!value || !*value) {
 971                                 printk(KERN_WARNING
 972                                        "CIFS: invalid path to network resource\n");
 973                                 return 1;       /* needs_arg; */
 974                         }
 975                         if ((temp_len = strnlen(value, 300)) < 300) {
 976                                 vol->UNC = kmalloc(temp_len+1,GFP_KERNEL);
 977                                 if (vol->UNC == NULL)
 978                                         return 1;
 979                                 strcpy(vol->UNC,value);
 980                                 if (strncmp(vol->UNC, "//", 2) == 0) {
 981                                         vol->UNC[0] = '\\';
 982                                         vol->UNC[1] = '\\';
 983                                 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
 984                                         printk(KERN_WARNING
 985                                                "CIFS: UNC Path does not begin with // or \\\\ \n");
 986                                         return 1;
 987                                 }
 988                         } else {
 989                                 printk(KERN_WARNING "CIFS: UNC name too long\n");
 990                                 return 1;
 991                         }
 992                 } else if ((strnicmp(data, "domain", 3) == 0)
 993                            || (strnicmp(data, "workgroup", 5) == 0)) {
 994                         if (!value || !*value) {
 995                                 printk(KERN_WARNING "CIFS: invalid domain name\n");
 996                                 return 1;       /* needs_arg; */
 997                         }
 998                         /* BB are there cases in which a comma can be valid in
 999                         a domain name and need special handling? */
1000                         if (strnlen(value, 256) < 256) {
1001                                 vol->domainname = value;
1002                                 cFYI(1, ("Domain name set"));
1003                         } else {
1004                                 printk(KERN_WARNING "CIFS: domain name too long\n");
1005                                 return 1;
1006                         }
1007                 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1008                         if (!value || !*value) {
1009                                 printk(KERN_WARNING
1010                                        "CIFS: invalid path prefix\n");
1011                                 return 1;       /* needs_arg; */
1012                         }
1013                         if ((temp_len = strnlen(value, 1024)) < 1024) {
1014                                 if (value[0] != '/')
1015                                         temp_len++;  /* missing leading slash */
1016                                 vol->prepath = kmalloc(temp_len+1,GFP_KERNEL);
1017                                 if (vol->prepath == NULL)
1018                                         return 1;
1019                                 if (value[0] != '/') {
1020                                         vol->prepath[0] = '/';
1021                                         strcpy(vol->prepath+1,value);
1022                                 } else
1023                                         strcpy(vol->prepath,value);
1024                                 cFYI(1,("prefix path %s",vol->prepath));
1025                         } else {
1026                                 printk(KERN_WARNING "CIFS: prefix too long\n");
1027                                 return 1;
1028                         }
1029                 } else if (strnicmp(data, "iocharset", 9) == 0) {
1030                         if (!value || !*value) {
1031                                 printk(KERN_WARNING "CIFS: invalid iocharset specified\n");
1032                                 return 1;       /* needs_arg; */
1033                         }
1034                         if (strnlen(value, 65) < 65) {
1035                                 if (strnicmp(value,"default",7))
1036                                         vol->iocharset = value;
1037                                 /* if iocharset not set load_nls_default used by caller */
1038                                 cFYI(1, ("iocharset set to %s",value));
1039                         } else {
1040                                 printk(KERN_WARNING "CIFS: iocharset name too long.\n");
1041                                 return 1;
1042                         }
1043                 } else if (strnicmp(data, "uid", 3) == 0) {
1044                         if (value && *value) {
1045                                 vol->linux_uid =
1046                                         simple_strtoul(value, &value, 0);
1047                                 vol->override_uid = 1;
1048                         }
1049                 } else if (strnicmp(data, "gid", 3) == 0) {
1050                         if (value && *value) {
1051                                 vol->linux_gid =
1052                                         simple_strtoul(value, &value, 0);
1053                                 vol->override_gid = 1;
1054                         }
1055                 } else if (strnicmp(data, "file_mode", 4) == 0) {
1056                         if (value && *value) {
1057                                 vol->file_mode =
1058                                         simple_strtoul(value, &value, 0);
1059                         }
1060                 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1061                         if (value && *value) {
1062                                 vol->dir_mode =
1063                                         simple_strtoul(value, &value, 0);
1064                         }
1065                 } else if (strnicmp(data, "dirmode", 4) == 0) {
1066                         if (value && *value) {
1067                                 vol->dir_mode =
1068                                         simple_strtoul(value, &value, 0);
1069                         }
1070                 } else if (strnicmp(data, "port", 4) == 0) {
1071                         if (value && *value) {
1072                                 vol->port =
1073                                         simple_strtoul(value, &value, 0);
1074                         }
1075                 } else if (strnicmp(data, "rsize", 5) == 0) {
1076                         if (value && *value) {
1077                                 vol->rsize =
1078                                         simple_strtoul(value, &value, 0);
1079                         }
1080                 } else if (strnicmp(data, "wsize", 5) == 0) {
1081                         if (value && *value) {
1082                                 vol->wsize =
1083                                         simple_strtoul(value, &value, 0);
1084                         }
1085                 } else if (strnicmp(data, "sockopt", 5) == 0) {
1086                         if (value && *value) {
1087                                 vol->sockopt =
1088                                         simple_strtoul(value, &value, 0);
1089                         }
1090                 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1091                         if (!value || !*value || (*value == ' ')) {
1092                                 cFYI(1,("invalid (empty) netbiosname specified"));
1093                         } else {
1094                                 memset(vol->source_rfc1001_name,0x20,15);
1095                                 for(i=0;i<15;i++) {
1096                                 /* BB are there cases in which a comma can be
1097                                 valid in this workstation netbios name (and need
1098                                 special handling)? */
1099
1100                                 /* We do not uppercase netbiosname for user */
1101                                         if (value[i]==0)
1102                                                 break;
1103                                         else
1104                                                 vol->source_rfc1001_name[i] = value[i];
1105                                 }
1106                                 /* The string has 16th byte zero still from
1107                                 set at top of the function  */
1108                                 if ((i==15) && (value[i] != 0))
1109                                         printk(KERN_WARNING "CIFS: netbiosname longer than 15 truncated.\n");
1110                         }
1111                 } else if (strnicmp(data, "servern", 7) == 0) {
1112                         /* servernetbiosname specified override *SMBSERVER */
1113                         if (!value || !*value || (*value == ' ')) {
1114                                 cFYI(1,("empty server netbiosname specified"));
1115                         } else {
1116                                 /* last byte, type, is 0x20 for servr type */
1117                                 memset(vol->target_rfc1001_name,0x20,16);
1118
1119                                 for(i=0;i<15;i++) {
1120                                 /* BB are there cases in which a comma can be
1121                                    valid in this workstation netbios name (and need
1122                                    special handling)? */
1123
1124                                 /* user or mount helper must uppercase netbiosname */
1125                                         if (value[i]==0)
1126                                                 break;
1127                                         else
1128                                                 vol->target_rfc1001_name[i] = value[i];
1129                                 }
1130                                 /* The string has 16th byte zero still from
1131                                    set at top of the function  */
1132                                 if ((i==15) && (value[i] != 0))
1133                                         printk(KERN_WARNING "CIFS: server netbiosname longer than 15 truncated.\n");
1134                         }
1135                 } else if (strnicmp(data, "credentials", 4) == 0) {
1136                         /* ignore */
1137                 } else if (strnicmp(data, "version", 3) == 0) {
1138                         /* ignore */
1139                 } else if (strnicmp(data, "guest",5) == 0) {
1140                         /* ignore */
1141                 } else if (strnicmp(data, "rw", 2) == 0) {
1142                         vol->rw = TRUE;
1143                 } else if ((strnicmp(data, "suid", 4) == 0) ||
1144                                    (strnicmp(data, "nosuid", 6) == 0) ||
1145                                    (strnicmp(data, "exec", 4) == 0) ||
1146                                    (strnicmp(data, "noexec", 6) == 0) ||
1147                                    (strnicmp(data, "nodev", 5) == 0) ||
1148                                    (strnicmp(data, "noauto", 6) == 0) ||
1149                                    (strnicmp(data, "dev", 3) == 0)) {
1150                         /*  The mount tool or mount.cifs helper (if present)
1151                                 uses these opts to set flags, and the flags are read
1152                                 by the kernel vfs layer before we get here (ie
1153                                 before read super) so there is no point trying to
1154                                 parse these options again and set anything and it
1155                                 is ok to just ignore them */
1156                         continue;
1157                 } else if (strnicmp(data, "ro", 2) == 0) {
1158                         vol->rw = FALSE;
1159                 } else if (strnicmp(data, "hard", 4) == 0) {
1160                         vol->retry = 1;
1161                 } else if (strnicmp(data, "soft", 4) == 0) {
1162                         vol->retry = 0;
1163                 } else if (strnicmp(data, "perm", 4) == 0) {
1164                         vol->noperm = 0;
1165                 } else if (strnicmp(data, "noperm", 6) == 0) {
1166                         vol->noperm = 1;
1167                 } else if (strnicmp(data, "mapchars", 8) == 0) {
1168                         vol->remap = 1;
1169                 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1170                         vol->remap = 0;
1171                 } else if (strnicmp(data, "sfu", 3) == 0) {
1172                         vol->sfu_emul = 1;
1173                 } else if (strnicmp(data, "nosfu", 5) == 0) {
1174                         vol->sfu_emul = 0;
1175                 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1176                         vol->posix_paths = 1;
1177                 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1178                         vol->posix_paths = 0;
1179                 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1180                            (strnicmp(data, "ignorecase", 10)  == 0)) {
1181                         vol->nocase = 1;
1182                 } else if (strnicmp(data, "brl", 3) == 0) {
1183                         vol->nobrl =  0;
1184                 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1185                            (strnicmp(data, "nolock", 6) == 0)) {
1186                         vol->nobrl =  1;
1187                         /* turn off mandatory locking in mode
1188                         if remote locking is turned off since the
1189                         local vfs will do advisory */
1190                         if(vol->file_mode == (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1191                                 vol->file_mode = S_IALLUGO;
1192                 } else if (strnicmp(data, "setuids", 7) == 0) {
1193                         vol->setuids = 1;
1194                 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1195                         vol->setuids = 0;
1196                 } else if (strnicmp(data, "nohard", 6) == 0) {
1197                         vol->retry = 0;
1198                 } else if (strnicmp(data, "nosoft", 6) == 0) {
1199                         vol->retry = 1;
1200                 } else if (strnicmp(data, "nointr", 6) == 0) {
1201                         vol->intr = 0;
1202                 } else if (strnicmp(data, "intr", 4) == 0) {
1203                         vol->intr = 1;
1204                 } else if (strnicmp(data, "serverino",7) == 0) {
1205                         vol->server_ino = 1;
1206                 } else if (strnicmp(data, "noserverino",9) == 0) {
1207                         vol->server_ino = 0;
1208                 } else if (strnicmp(data, "cifsacl",7) == 0) {
1209                         vol->cifs_acl = 1;
1210                 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1211                         vol->cifs_acl = 0;
1212                 } else if (strnicmp(data, "acl",3) == 0) {
1213                         vol->no_psx_acl = 0;
1214                 } else if (strnicmp(data, "noacl",5) == 0) {
1215                         vol->no_psx_acl = 1;
1216                 } else if (strnicmp(data, "sign",4) == 0) {
1217                         vol->secFlg |= CIFSSEC_MUST_SIGN;
1218 /*              } else if (strnicmp(data, "seal",4) == 0) {
1219                         vol->secFlg |= CIFSSEC_MUST_SEAL; */
1220                 } else if (strnicmp(data, "direct",6) == 0) {
1221                         vol->direct_io = 1;
1222                 } else if (strnicmp(data, "forcedirectio",13) == 0) {
1223                         vol->direct_io = 1;
1224                 } else if (strnicmp(data, "in6_addr",8) == 0) {
1225                         if (!value || !*value) {
1226                                 vol->in6_addr = NULL;
1227                         } else if (strnlen(value, 49) == 48) {
1228                                 vol->in6_addr = value;
1229                         } else {
1230                                 printk(KERN_WARNING "CIFS: ip v6 address not 48 characters long\n");
1231                                 return 1;
1232                         }
1233                 } else if (strnicmp(data, "noac", 4) == 0) {
1234                         printk(KERN_WARNING "CIFS: Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n");
1235                 } else
1236                         printk(KERN_WARNING "CIFS: Unknown mount option %s\n",data);
1237         }
1238         if (vol->UNC == NULL) {
1239                 if (devname == NULL) {
1240                         printk(KERN_WARNING "CIFS: Missing UNC name for mount target\n");
1241                         return 1;
1242                 }
1243                 if ((temp_len = strnlen(devname, 300)) < 300) {
1244                         vol->UNC = kmalloc(temp_len+1,GFP_KERNEL);
1245                         if (vol->UNC == NULL)
1246                                 return 1;
1247                         strcpy(vol->UNC,devname);
1248                         if (strncmp(vol->UNC, "//", 2) == 0) {
1249                                 vol->UNC[0] = '\\';
1250                                 vol->UNC[1] = '\\';
1251                         } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1252                                 printk(KERN_WARNING "CIFS: UNC Path does not begin with // or \\\\ \n");
1253                                 return 1;
1254                         }
1255                 } else {
1256                         printk(KERN_WARNING "CIFS: UNC name too long\n");
1257                         return 1;
1258                 }
1259         }
1260         if(vol->UNCip == NULL)
1261                 vol->UNCip = &vol->UNC[2];
1262
1263         return 0;
1264 }
1265
1266 static struct cifsSesInfo *
1267 cifs_find_tcp_session(struct in_addr * target_ip_addr,
1268                 struct in6_addr *target_ip6_addr,
1269                  char *userName, struct TCP_Server_Info **psrvTcp)
1270 {
1271         struct list_head *tmp;
1272         struct cifsSesInfo *ses;
1273         *psrvTcp = NULL;
1274         read_lock(&GlobalSMBSeslock);
1275
1276         list_for_each(tmp, &GlobalSMBSessionList) {
1277                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
1278                 if (ses->server) {
1279                         if((target_ip_addr &&
1280                                 (ses->server->addr.sockAddr.sin_addr.s_addr
1281                                   == target_ip_addr->s_addr)) || (target_ip6_addr
1282                                 && memcmp(&ses->server->addr.sockAddr6.sin6_addr,
1283                                         target_ip6_addr,sizeof(*target_ip6_addr)))){
1284                                 /* BB lock server and tcp session and increment use count here?? */
1285                                 *psrvTcp = ses->server; /* found a match on the TCP session */
1286                                 /* BB check if reconnection needed */
1287                                 if (strncmp
1288                                     (ses->userName, userName,
1289                                      MAX_USERNAME_SIZE) == 0){
1290                                         read_unlock(&GlobalSMBSeslock);
1291                                         return ses;     /* found exact match on both tcp and SMB sessions */
1292                                 }
1293                         }
1294                 }
1295                 /* else tcp and smb sessions need reconnection */
1296         }
1297         read_unlock(&GlobalSMBSeslock);
1298         return NULL;
1299 }
1300
1301 static struct cifsTconInfo *
1302 find_unc(__be32 new_target_ip_addr, char *uncName, char *userName)
1303 {
1304         struct list_head *tmp;
1305         struct cifsTconInfo *tcon;
1306
1307         read_lock(&GlobalSMBSeslock);
1308         list_for_each(tmp, &GlobalTreeConnectionList) {
1309                 cFYI(1, ("Next tcon"));
1310                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
1311                 if (tcon->ses) {
1312                         if (tcon->ses->server) {
1313                                 cFYI(1,
1314                                      ("old ip addr: %x == new ip %x ?",
1315                                       tcon->ses->server->addr.sockAddr.sin_addr.
1316                                       s_addr, new_target_ip_addr));
1317                                 if (tcon->ses->server->addr.sockAddr.sin_addr.
1318                                     s_addr == new_target_ip_addr) {
1319         /* BB lock tcon, server and tcp session and increment use count here? */
1320                                         /* found a match on the TCP session */
1321                                         /* BB check if reconnection needed */
1322                                         cFYI(1,("IP match, old UNC: %s new: %s",
1323                                               tcon->treeName, uncName));
1324                                         if (strncmp
1325                                             (tcon->treeName, uncName,
1326                                              MAX_TREE_SIZE) == 0) {
1327                                                 cFYI(1,
1328                                                      ("and old usr: %s new: %s",
1329                                                       tcon->treeName, uncName));
1330                                                 if (strncmp
1331                                                     (tcon->ses->userName,
1332                                                      userName,
1333                                                      MAX_USERNAME_SIZE) == 0) {
1334                                                         read_unlock(&GlobalSMBSeslock);
1335                                                         /* matched smb session
1336                                                         (user name */
1337                                                         return tcon;
1338                                                 }
1339                                         }
1340                                 }
1341                         }
1342                 }
1343         }
1344         read_unlock(&GlobalSMBSeslock);
1345         return NULL;
1346 }
1347
1348 int
1349 connect_to_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1350                     const char *old_path, const struct nls_table *nls_codepage,
1351                     int remap)
1352 {
1353         unsigned char *referrals = NULL;
1354         unsigned int num_referrals;
1355         int rc = 0;
1356
1357         rc = get_dfs_path(xid, pSesInfo,old_path, nls_codepage,
1358                         &num_referrals, &referrals, remap);
1359
1360         /* BB Add in code to: if valid refrl, if not ip address contact
1361                 the helper that resolves tcp names, mount to it, try to
1362                 tcon to it unmount it if fail */
1363
1364         kfree(referrals);
1365
1366         return rc;
1367 }
1368
1369 int
1370 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1371                         const char *old_path, const struct nls_table *nls_codepage,
1372                         unsigned int *pnum_referrals,
1373                         unsigned char ** preferrals, int remap)
1374 {
1375         char *temp_unc;
1376         int rc = 0;
1377
1378         *pnum_referrals = 0;
1379
1380         if (pSesInfo->ipc_tid == 0) {
1381                 temp_unc = kmalloc(2 /* for slashes */ +
1382                         strnlen(pSesInfo->serverName,SERVER_NAME_LEN_WITH_NULL * 2)
1383                                  + 1 + 4 /* slash IPC$ */  + 2,
1384                                 GFP_KERNEL);
1385                 if (temp_unc == NULL)
1386                         return -ENOMEM;
1387                 temp_unc[0] = '\\';
1388                 temp_unc[1] = '\\';
1389                 strcpy(temp_unc + 2, pSesInfo->serverName);
1390                 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1391                 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1392                 cFYI(1,
1393                      ("CIFS Tcon rc = %d ipc_tid = %d", rc,pSesInfo->ipc_tid));
1394                 kfree(temp_unc);
1395         }
1396         if (rc == 0)
1397                 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1398                                      pnum_referrals, nls_codepage, remap);
1399
1400         return rc;
1401 }
1402
1403 /* See RFC1001 section 14 on representation of Netbios names */
1404 static void rfc1002mangle(char * target,char * source, unsigned int length)
1405 {
1406         unsigned int i,j;
1407
1408         for(i=0,j=0;i<(length);i++) {
1409                 /* mask a nibble at a time and encode */
1410                 target[j] = 'A' + (0x0F & (source[i] >> 4));
1411                 target[j+1] = 'A' + (0x0F & source[i]);
1412                 j+=2;
1413         }
1414
1415 }
1416
1417
1418 static int
1419 ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
1420              char * netbios_name, char * target_name)
1421 {
1422         int rc = 0;
1423         int connected = 0;
1424         __be16 orig_port = 0;
1425
1426         if(*csocket == NULL) {
1427                 rc = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, csocket);
1428                 if (rc < 0) {
1429                         cERROR(1, ("Error %d creating socket",rc));
1430                         *csocket = NULL;
1431                         return rc;
1432                 } else {
1433                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1434                         cFYI(1,("Socket created"));
1435                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1436                 }
1437         }
1438
1439         psin_server->sin_family = AF_INET;
1440         if(psin_server->sin_port) { /* user overrode default port */
1441                 rc = (*csocket)->ops->connect(*csocket,
1442                                 (struct sockaddr *) psin_server,
1443                                 sizeof (struct sockaddr_in),0);
1444                 if (rc >= 0)
1445                         connected = 1;
1446         }
1447
1448         if(!connected) {
1449                 /* save original port so we can retry user specified port
1450                         later if fall back ports fail this time  */
1451                 orig_port = psin_server->sin_port;
1452
1453                 /* do not retry on the same port we just failed on */
1454                 if(psin_server->sin_port != htons(CIFS_PORT)) {
1455                         psin_server->sin_port = htons(CIFS_PORT);
1456
1457                         rc = (*csocket)->ops->connect(*csocket,
1458                                         (struct sockaddr *) psin_server,
1459                                         sizeof (struct sockaddr_in),0);
1460                         if (rc >= 0)
1461                                 connected = 1;
1462                 }
1463         }
1464         if (!connected) {
1465                 psin_server->sin_port = htons(RFC1001_PORT);
1466                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1467                                               psin_server, sizeof (struct sockaddr_in),0);
1468                 if (rc >= 0)
1469                         connected = 1;
1470         }
1471
1472         /* give up here - unless we want to retry on different
1473                 protocol families some day */
1474         if (!connected) {
1475                 if(orig_port)
1476                         psin_server->sin_port = orig_port;
1477                 cFYI(1,("Error %d connecting to server via ipv4",rc));
1478                 sock_release(*csocket);
1479                 *csocket = NULL;
1480                 return rc;
1481         }
1482         /* Eventually check for other socket options to change from
1483                 the default. sock_setsockopt not used because it expects
1484                 user space buffer */
1485          cFYI(1,("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",(*csocket)->sk->sk_sndbuf,
1486                  (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
1487         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1488         /* make the bufsizes depend on wsize/rsize and max requests */
1489         if((*csocket)->sk->sk_sndbuf < (200 * 1024))
1490                 (*csocket)->sk->sk_sndbuf = 200 * 1024;
1491         if((*csocket)->sk->sk_rcvbuf < (140 * 1024))
1492                 (*csocket)->sk->sk_rcvbuf = 140 * 1024;
1493
1494         /* send RFC1001 sessinit */
1495         if(psin_server->sin_port == htons(RFC1001_PORT)) {
1496                 /* some servers require RFC1001 sessinit before sending
1497                 negprot - BB check reconnection in case where second
1498                 sessinit is sent but no second negprot */
1499                 struct rfc1002_session_packet * ses_init_buf;
1500                 struct smb_hdr * smb_buf;
1501                 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), GFP_KERNEL);
1502                 if(ses_init_buf) {
1503                         ses_init_buf->trailer.session_req.called_len = 32;
1504                         if(target_name && (target_name[0] != 0)) {
1505                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1506                                         target_name, 16);
1507                         } else {
1508                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1509                                         DEFAULT_CIFS_CALLED_NAME,16);
1510                         }
1511
1512                         ses_init_buf->trailer.session_req.calling_len = 32;
1513                         /* calling name ends in null (byte 16) from old smb
1514                         convention. */
1515                         if(netbios_name && (netbios_name[0] !=0)) {
1516                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1517                                         netbios_name,16);
1518                         } else {
1519                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1520                                         "LINUX_CIFS_CLNT",16);
1521                         }
1522                         ses_init_buf->trailer.session_req.scope1 = 0;
1523                         ses_init_buf->trailer.session_req.scope2 = 0;
1524                         smb_buf = (struct smb_hdr *)ses_init_buf;
1525                         /* sizeof RFC1002_SESSION_REQUEST with no scope */
1526                         smb_buf->smb_buf_length = 0x81000044;
1527                         rc = smb_send(*csocket, smb_buf, 0x44,
1528                                 (struct sockaddr *)psin_server);
1529                         kfree(ses_init_buf);
1530                         msleep(1); /* RFC1001 layer in at least one server
1531                                       requires very short break before negprot
1532                                       presumably because not expecting negprot
1533                                       to follow so fast.  This is a simple
1534                                       solution that works without
1535                                       complicating the code and causes no
1536                                       significant slowing down on mount
1537                                       for everyone else */
1538                 }
1539                 /* else the negprot may still work without this
1540                 even though malloc failed */
1541
1542         }
1543
1544         return rc;
1545 }
1546
1547 static int
1548 ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
1549 {
1550         int rc = 0;
1551         int connected = 0;
1552         __be16 orig_port = 0;
1553
1554         if(*csocket == NULL) {
1555                 rc = sock_create_kern(PF_INET6, SOCK_STREAM, IPPROTO_TCP, csocket);
1556                 if (rc < 0) {
1557                         cERROR(1, ("Error %d creating ipv6 socket",rc));
1558                         *csocket = NULL;
1559                         return rc;
1560                 } else {
1561                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1562                          cFYI(1,("ipv6 Socket created"));
1563                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1564                 }
1565         }
1566
1567         psin_server->sin6_family = AF_INET6;
1568
1569         if(psin_server->sin6_port) { /* user overrode default port */
1570                 rc = (*csocket)->ops->connect(*csocket,
1571                                 (struct sockaddr *) psin_server,
1572                                 sizeof (struct sockaddr_in6),0);
1573                 if (rc >= 0)
1574                         connected = 1;
1575         }
1576
1577         if(!connected) {
1578                 /* save original port so we can retry user specified port
1579                         later if fall back ports fail this time  */
1580
1581                 orig_port = psin_server->sin6_port;
1582                 /* do not retry on the same port we just failed on */
1583                 if(psin_server->sin6_port != htons(CIFS_PORT)) {
1584                         psin_server->sin6_port = htons(CIFS_PORT);
1585
1586                         rc = (*csocket)->ops->connect(*csocket,
1587                                         (struct sockaddr *) psin_server,
1588                                         sizeof (struct sockaddr_in6),0);
1589                         if (rc >= 0)
1590                                 connected = 1;
1591                 }
1592         }
1593         if (!connected) {
1594                 psin_server->sin6_port = htons(RFC1001_PORT);
1595                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1596                                          psin_server, sizeof (struct sockaddr_in6),0);
1597                 if (rc >= 0)
1598                         connected = 1;
1599         }
1600
1601         /* give up here - unless we want to retry on different
1602                 protocol families some day */
1603         if (!connected) {
1604                 if(orig_port)
1605                         psin_server->sin6_port = orig_port;
1606                 cFYI(1,("Error %d connecting to server via ipv6",rc));
1607                 sock_release(*csocket);
1608                 *csocket = NULL;
1609                 return rc;
1610         }
1611         /* Eventually check for other socket options to change from
1612                 the default. sock_setsockopt not used because it expects
1613                 user space buffer */
1614         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1615
1616         return rc;
1617 }
1618
1619 void reset_cifs_unix_caps(int xid, struct cifsTconInfo * tcon,
1620                           struct super_block * sb, struct smb_vol * vol_info)
1621 {
1622         /* if we are reconnecting then should we check to see if
1623          * any requested capabilities changed locally e.g. via
1624          * remount but we can not do much about it here
1625          * if they have (even if we could detect it by the following)
1626          * Perhaps we could add a backpointer to array of sb from tcon
1627          * or if we change to make all sb to same share the same
1628          * sb as NFS - then we only have one backpointer to sb.
1629          * What if we wanted to mount the server share twice once with
1630          * and once without posixacls or posix paths? */
1631         __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1632
1633
1634         if(!CIFSSMBQFSUnixInfo(xid, tcon)) {
1635                 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1636
1637                 /* check for reconnect case in which we do not
1638                    want to change the mount behavior if we can avoid it */
1639                 if(vol_info == NULL) {
1640                         /* turn off POSIX ACL and PATHNAMES if not set
1641                            originally at mount time */
1642                         if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
1643                                 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1644                         if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0)
1645                                 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1646
1647
1648
1649
1650                 }
1651
1652                 cap &= CIFS_UNIX_CAP_MASK;
1653                 if(vol_info && vol_info->no_psx_acl)
1654                         cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1655                 else if(CIFS_UNIX_POSIX_ACL_CAP & cap) {
1656                         cFYI(1,("negotiated posix acl support"));
1657                         if(sb)
1658                                 sb->s_flags |= MS_POSIXACL;
1659                 }
1660
1661                 if(vol_info && vol_info->posix_paths == 0)
1662                         cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1663                 else if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
1664                         cFYI(1,("negotiate posix pathnames"));
1665                         if(sb)
1666                                 CIFS_SB(sb)->mnt_cifs_flags |=
1667                                         CIFS_MOUNT_POSIX_PATHS;
1668                 }
1669
1670                 /* We might be setting the path sep back to a different
1671                 form if we are reconnecting and the server switched its
1672                 posix path capability for this share */
1673                 if(sb && (CIFS_SB(sb)->prepathlen > 0))
1674                         CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
1675
1676                 cFYI(1,("Negotiate caps 0x%x",(int)cap));
1677 #ifdef CONFIG_CIFS_DEBUG2
1678                 if(cap & CIFS_UNIX_FCNTL_CAP)
1679                         cFYI(1,("FCNTL cap"));
1680                 if(cap & CIFS_UNIX_EXTATTR_CAP)
1681                         cFYI(1,("EXTATTR cap"));
1682                 if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
1683                         cFYI(1,("POSIX path cap"));
1684                 if(cap & CIFS_UNIX_XATTR_CAP)
1685                         cFYI(1,("XATTR cap"));
1686                 if(cap & CIFS_UNIX_POSIX_ACL_CAP)
1687                         cFYI(1,("POSIX ACL cap"));
1688 #endif /* CIFS_DEBUG2 */
1689                 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
1690                         cFYI(1,("setting capabilities failed"));
1691                 }
1692         }
1693 }
1694
1695 int
1696 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
1697            char *mount_data, const char *devname)
1698 {
1699         int rc = 0;
1700         int xid;
1701         int address_type = AF_INET;
1702         struct socket *csocket = NULL;
1703         struct sockaddr_in sin_server;
1704         struct sockaddr_in6 sin_server6;
1705         struct smb_vol volume_info;
1706         struct cifsSesInfo *pSesInfo = NULL;
1707         struct cifsSesInfo *existingCifsSes = NULL;
1708         struct cifsTconInfo *tcon = NULL;
1709         struct TCP_Server_Info *srvTcp = NULL;
1710
1711         xid = GetXid();
1712
1713 /* cFYI(1, ("Entering cifs_mount. Xid: %d with: %s", xid, mount_data)); */
1714
1715         memset(&volume_info,0,sizeof(struct smb_vol));
1716         if (cifs_parse_mount_options(mount_data, devname, &volume_info)) {
1717                 kfree(volume_info.UNC);
1718                 kfree(volume_info.password);
1719                 kfree(volume_info.prepath);
1720                 FreeXid(xid);
1721                 return -EINVAL;
1722         }
1723
1724         if (volume_info.nullauth) {
1725                 cFYI(1,("null user"));
1726                 volume_info.username = NULL;
1727         } else if (volume_info.username) {
1728                 /* BB fixme parse for domain name here */
1729                 cFYI(1, ("Username: %s ", volume_info.username));
1730         } else {
1731                 cifserror("No username specified");
1732         /* In userspace mount helper we can get user name from alternate
1733            locations such as env variables and files on disk */
1734                 kfree(volume_info.UNC);
1735                 kfree(volume_info.password);
1736                 kfree(volume_info.prepath);
1737                 FreeXid(xid);
1738                 return -EINVAL;
1739         }
1740
1741         if (volume_info.UNCip && volume_info.UNC) {
1742                 rc = cifs_inet_pton(AF_INET, volume_info.UNCip,&sin_server.sin_addr.s_addr);
1743
1744                 if(rc <= 0) {
1745                         /* not ipv4 address, try ipv6 */
1746                         rc = cifs_inet_pton(AF_INET6,volume_info.UNCip,&sin_server6.sin6_addr.in6_u);
1747                         if(rc > 0)
1748                                 address_type = AF_INET6;
1749                 } else {
1750                         address_type = AF_INET;
1751                 }
1752
1753                 if(rc <= 0) {
1754                         /* we failed translating address */
1755                         kfree(volume_info.UNC);
1756                         kfree(volume_info.password);
1757                         kfree(volume_info.prepath);
1758                         FreeXid(xid);
1759                         return -EINVAL;
1760                 }
1761
1762                 cFYI(1, ("UNC: %s ip: %s", volume_info.UNC, volume_info.UNCip));
1763                 /* success */
1764                 rc = 0;
1765         } else if (volume_info.UNCip){
1766                 /* BB using ip addr as server name connect to the DFS root below */
1767                 cERROR(1,("Connecting to DFS root not implemented yet"));
1768                 kfree(volume_info.UNC);
1769                 kfree(volume_info.password);
1770                 kfree(volume_info.prepath);
1771                 FreeXid(xid);
1772                 return -EINVAL;
1773         } else /* which servers DFS root would we conect to */ {
1774                 cERROR(1,
1775                        ("CIFS mount error: No UNC path (e.g. -o unc=//192.168.1.100/public) specified"));
1776                 kfree(volume_info.UNC);
1777                 kfree(volume_info.password);
1778                 kfree(volume_info.prepath);
1779                 FreeXid(xid);
1780                 return -EINVAL;
1781         }
1782
1783         /* this is needed for ASCII cp to Unicode converts */
1784         if(volume_info.iocharset == NULL) {
1785                 cifs_sb->local_nls = load_nls_default();
1786         /* load_nls_default can not return null */
1787         } else {
1788                 cifs_sb->local_nls = load_nls(volume_info.iocharset);
1789                 if(cifs_sb->local_nls == NULL) {
1790                         cERROR(1,("CIFS mount error: iocharset %s not found",volume_info.iocharset));
1791                         kfree(volume_info.UNC);
1792                         kfree(volume_info.password);
1793                         kfree(volume_info.prepath);
1794                         FreeXid(xid);
1795                         return -ELIBACC;
1796                 }
1797         }
1798
1799         if(address_type == AF_INET)
1800                 existingCifsSes = cifs_find_tcp_session(&sin_server.sin_addr,
1801                         NULL /* no ipv6 addr */,
1802                         volume_info.username, &srvTcp);
1803         else if(address_type == AF_INET6) {
1804                 cFYI(1,("looking for ipv6 address"));
1805                 existingCifsSes = cifs_find_tcp_session(NULL /* no ipv4 addr */,
1806                         &sin_server6.sin6_addr,
1807                         volume_info.username, &srvTcp);
1808         } else {
1809                 kfree(volume_info.UNC);
1810                 kfree(volume_info.password);
1811                 kfree(volume_info.prepath);
1812                 FreeXid(xid);
1813                 return -EINVAL;
1814         }
1815
1816
1817         if (srvTcp) {
1818                 cFYI(1, ("Existing tcp session with server found"));
1819         } else {        /* create socket */
1820                 if (volume_info.port)
1821                         sin_server.sin_port = htons(volume_info.port);
1822                 else
1823                         sin_server.sin_port = 0;
1824                 if (address_type == AF_INET6) {
1825                         cFYI(1,("attempting ipv6 connect"));
1826                         /* BB should we allow ipv6 on port 139? */
1827                         /* other OS never observed in Wild doing 139 with v6 */
1828                         rc = ipv6_connect(&sin_server6,&csocket);
1829                 } else
1830                         rc = ipv4_connect(&sin_server,&csocket,
1831                                   volume_info.source_rfc1001_name,
1832                                   volume_info.target_rfc1001_name);
1833                 if (rc < 0) {
1834                         cERROR(1,
1835                                ("Error connecting to IPv4 socket. Aborting operation"));
1836                         if (csocket != NULL)
1837                                 sock_release(csocket);
1838                         kfree(volume_info.UNC);
1839                         kfree(volume_info.password);
1840                         kfree(volume_info.prepath);
1841                         FreeXid(xid);
1842                         return rc;
1843                 }
1844
1845                 srvTcp = kmalloc(sizeof (struct TCP_Server_Info), GFP_KERNEL);
1846                 if (srvTcp == NULL) {
1847                         rc = -ENOMEM;
1848                         sock_release(csocket);
1849                         kfree(volume_info.UNC);
1850                         kfree(volume_info.password);
1851                         kfree(volume_info.prepath);
1852                         FreeXid(xid);
1853                         return rc;
1854                 } else {
1855                         memset(srvTcp, 0, sizeof (struct TCP_Server_Info));
1856                         memcpy(&srvTcp->addr.sockAddr, &sin_server, sizeof (struct sockaddr_in));
1857                         atomic_set(&srvTcp->inFlight,0);
1858                         /* BB Add code for ipv6 case too */
1859                         srvTcp->ssocket = csocket;
1860                         srvTcp->protocolType = IPV4;
1861                         init_waitqueue_head(&srvTcp->response_q);
1862                         init_waitqueue_head(&srvTcp->request_q);
1863                         INIT_LIST_HEAD(&srvTcp->pending_mid_q);
1864                         /* at this point we are the only ones with the pointer
1865                         to the struct since the kernel thread not created yet
1866                         so no need to spinlock this init of tcpStatus */
1867                         srvTcp->tcpStatus = CifsNew;
1868                         init_MUTEX(&srvTcp->tcpSem);
1869                         srvTcp->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, srvTcp, "cifsd");
1870                         if ( IS_ERR(srvTcp->tsk) ) {
1871                                 rc = PTR_ERR(srvTcp->tsk);
1872                                 cERROR(1,("error %d create cifsd thread", rc));
1873                                 srvTcp->tsk = NULL;
1874                                 sock_release(csocket);
1875                                 kfree(volume_info.UNC);
1876                                 kfree(volume_info.password);
1877                                 kfree(volume_info.prepath);
1878                                 FreeXid(xid);
1879                                 return rc;
1880                         }
1881                         wait_for_completion(&cifsd_complete);
1882                         rc = 0;
1883                         memcpy(srvTcp->workstation_RFC1001_name, volume_info.source_rfc1001_name,16);
1884                         memcpy(srvTcp->server_RFC1001_name, volume_info.target_rfc1001_name,16);
1885                         srvTcp->sequence_number = 0;
1886                 }
1887         }
1888
1889         if (existingCifsSes) {
1890                 pSesInfo = existingCifsSes;
1891                 cFYI(1, ("Existing smb sess found"));
1892                 kfree(volume_info.password);
1893                 /* volume_info.UNC freed at end of function */
1894         } else if (!rc) {
1895                 cFYI(1, ("Existing smb sess not found"));
1896                 pSesInfo = sesInfoAlloc();
1897                 if (pSesInfo == NULL)
1898                         rc = -ENOMEM;
1899                 else {
1900                         pSesInfo->server = srvTcp;
1901                         sprintf(pSesInfo->serverName, "%u.%u.%u.%u",
1902                                 NIPQUAD(sin_server.sin_addr.s_addr));
1903                 }
1904
1905                 if (!rc){
1906                         /* volume_info.password freed at unmount */
1907                         if (volume_info.password)
1908                                 pSesInfo->password = volume_info.password;
1909                         if (volume_info.username)
1910                                 strncpy(pSesInfo->userName,
1911                                         volume_info.username,MAX_USERNAME_SIZE);
1912                         if (volume_info.domainname) {
1913                                 int len = strlen(volume_info.domainname);
1914                                 pSesInfo->domainName =
1915                                         kmalloc(len + 1, GFP_KERNEL);
1916                                 if (pSesInfo->domainName)
1917                                         strcpy(pSesInfo->domainName,
1918                                                 volume_info.domainname);
1919                         }
1920                         pSesInfo->linux_uid = volume_info.linux_uid;
1921                         pSesInfo->overrideSecFlg = volume_info.secFlg;
1922                         down(&pSesInfo->sesSem);
1923                         /* BB FIXME need to pass vol->secFlgs BB */
1924                         rc = cifs_setup_session(xid,pSesInfo, cifs_sb->local_nls);
1925                         up(&pSesInfo->sesSem);
1926                         if (!rc)
1927                                 atomic_inc(&srvTcp->socketUseCount);
1928                 } else
1929                         kfree(volume_info.password);
1930         }
1931
1932         /* search for existing tcon to this server share */
1933         if (!rc) {
1934                 if (volume_info.rsize > CIFSMaxBufSize) {
1935                         cERROR(1,("rsize %d too large, using MaxBufSize",
1936                                 volume_info.rsize));
1937                         cifs_sb->rsize = CIFSMaxBufSize;
1938                 } else if((volume_info.rsize) && (volume_info.rsize <= CIFSMaxBufSize))
1939                         cifs_sb->rsize = volume_info.rsize;
1940                 else /* default */
1941                         cifs_sb->rsize = CIFSMaxBufSize;
1942
1943                 if (volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
1944                         cERROR(1,("wsize %d too large using 4096 instead",
1945                                   volume_info.wsize));
1946                         cifs_sb->wsize = 4096;
1947                 } else if (volume_info.wsize)
1948                         cifs_sb->wsize = volume_info.wsize;
1949                 else
1950                         cifs_sb->wsize =
1951                                 min_t(const int, PAGEVEC_SIZE * PAGE_CACHE_SIZE,
1952                                         127*1024);
1953                         /* old default of CIFSMaxBufSize was too small now
1954                            that SMB Write2 can send multiple pages in kvec.
1955                            RFC1001 does not describe what happens when frame
1956                            bigger than 128K is sent so use that as max in
1957                            conjunction with 52K kvec constraint on arch with 4K
1958                            page size  */
1959
1960                 if (cifs_sb->rsize < 2048) {
1961                         cifs_sb->rsize = 2048;
1962                         /* Windows ME may prefer this */
1963                         cFYI(1,("readsize set to minimum 2048"));
1964                 }
1965                 /* calculate prepath */
1966                 cifs_sb->prepath = volume_info.prepath;
1967                 if (cifs_sb->prepath) {
1968                         cifs_sb->prepathlen = strlen(cifs_sb->prepath);
1969                         cifs_sb->prepath[0] = CIFS_DIR_SEP(cifs_sb);
1970                         volume_info.prepath = NULL;
1971                 } else
1972                         cifs_sb->prepathlen = 0;
1973                 cifs_sb->mnt_uid = volume_info.linux_uid;
1974                 cifs_sb->mnt_gid = volume_info.linux_gid;
1975                 cifs_sb->mnt_file_mode = volume_info.file_mode;
1976                 cifs_sb->mnt_dir_mode = volume_info.dir_mode;
1977                 cFYI(1,("file mode: 0x%x  dir mode: 0x%x",
1978                         cifs_sb->mnt_file_mode,cifs_sb->mnt_dir_mode));
1979
1980                 if (volume_info.noperm)
1981                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
1982                 if (volume_info.setuids)
1983                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
1984                 if (volume_info.server_ino)
1985                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
1986                 if (volume_info.remap)
1987                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
1988                 if (volume_info.no_xattr)
1989                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
1990                 if (volume_info.sfu_emul)
1991                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
1992                 if (volume_info.nobrl)
1993                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
1994                 if (volume_info.cifs_acl)
1995                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
1996                 if (volume_info.override_uid)
1997                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
1998                 if (volume_info.override_gid)
1999                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2000                 if (volume_info.direct_io) {
2001                         cFYI(1,("mounting share using direct i/o"));
2002                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2003                 }
2004
2005                 tcon =
2006                     find_unc(sin_server.sin_addr.s_addr, volume_info.UNC,
2007                              volume_info.username);
2008                 if (tcon) {
2009                         cFYI(1, ("Found match on UNC path"));
2010                         /* we can have only one retry value for a connection
2011                            to a share so for resources mounted more than once
2012                            to the same server share the last value passed in
2013                            for the retry flag is used */
2014                         tcon->retry = volume_info.retry;
2015                         tcon->nocase = volume_info.nocase;
2016                 } else {
2017                         tcon = tconInfoAlloc();
2018                         if (tcon == NULL)
2019                                 rc = -ENOMEM;
2020                         else {
2021                                 /* check for null share name ie connecting to
2022                                  * dfs root */
2023
2024                                 /* BB check if this works for exactly length
2025                                  * three strings */
2026                                 if ((strchr(volume_info.UNC + 3, '\\') == NULL)
2027                                     && (strchr(volume_info.UNC + 3, '/') ==
2028                                         NULL)) {
2029                                         rc = connect_to_dfs_path(xid, pSesInfo,
2030                                                 "", cifs_sb->local_nls,
2031                                                 cifs_sb->mnt_cifs_flags &
2032                                                   CIFS_MOUNT_MAP_SPECIAL_CHR);
2033                                         kfree(volume_info.UNC);
2034                                         FreeXid(xid);
2035                                         return -ENODEV;
2036                                 } else {
2037                                         /* BB Do we need to wrap sesSem around
2038                                          * this TCon call and Unix SetFS as
2039                                          * we do on SessSetup and reconnect? */
2040                                         rc = CIFSTCon(xid, pSesInfo,
2041                                                 volume_info.UNC,
2042                                                 tcon, cifs_sb->local_nls);
2043                                         cFYI(1, ("CIFS Tcon rc = %d", rc));
2044                                 }
2045                                 if (!rc) {
2046                                         atomic_inc(&pSesInfo->inUse);
2047                                         tcon->retry = volume_info.retry;
2048                                         tcon->nocase = volume_info.nocase;
2049                                 }
2050                         }
2051                 }
2052         }
2053         if (pSesInfo) {
2054                 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
2055                         sb->s_maxbytes = (u64) 1 << 63;
2056                 } else
2057                         sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
2058         }
2059
2060         /* BB FIXME fix time_gran to be larger for LANMAN sessions */
2061         sb->s_time_gran = 100;
2062
2063 /* on error free sesinfo and tcon struct if needed */
2064         if (rc) {
2065                 /* if session setup failed, use count is zero but
2066                 we still need to free cifsd thread */
2067                 if (atomic_read(&srvTcp->socketUseCount) == 0) {
2068                         spin_lock(&GlobalMid_Lock);
2069                         srvTcp->tcpStatus = CifsExiting;
2070                         spin_unlock(&GlobalMid_Lock);
2071                         if (srvTcp->tsk) {
2072                                 send_sig(SIGKILL,srvTcp->tsk,1);
2073                                 kthread_stop(srvTcp->tsk);
2074                         }
2075                 }
2076                  /* If find_unc succeeded then rc == 0 so we can not end */
2077                 if (tcon)  /* up accidently freeing someone elses tcon struct */
2078                         tconInfoFree(tcon);
2079                 if (existingCifsSes == NULL) {
2080                         if (pSesInfo) {
2081                                 if ((pSesInfo->server) &&
2082                                     (pSesInfo->status == CifsGood)) {
2083                                         int temp_rc;
2084                                         temp_rc = CIFSSMBLogoff(xid, pSesInfo);
2085                                         /* if the socketUseCount is now zero */
2086                                         if ((temp_rc == -ESHUTDOWN) &&
2087                                            (pSesInfo->server) && (pSesInfo->server->tsk)) {
2088                                                 send_sig(SIGKILL,pSesInfo->server->tsk,1);
2089                                                 kthread_stop(pSesInfo->server->tsk);
2090                                         }
2091                                 } else
2092                                         cFYI(1, ("No session or bad tcon"));
2093                                 sesInfoFree(pSesInfo);
2094                                 /* pSesInfo = NULL; */
2095                         }
2096                 }
2097         } else {
2098                 atomic_inc(&tcon->useCount);
2099                 cifs_sb->tcon = tcon;
2100                 tcon->ses = pSesInfo;
2101
2102                 /* do not care if following two calls succeed - informational */
2103                 CIFSSMBQFSDeviceInfo(xid, tcon);
2104                 CIFSSMBQFSAttributeInfo(xid, tcon);
2105
2106                 /* tell server which Unix caps we support */
2107                 if (tcon->ses->capabilities & CAP_UNIX)
2108                         reset_cifs_unix_caps(xid, tcon, sb, &volume_info);
2109
2110                 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2111                         cifs_sb->wsize = min(cifs_sb->wsize,
2112                                              (tcon->ses->server->maxBuf -
2113                                               MAX_CIFS_HDR_SIZE));
2114                 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2115                         cifs_sb->rsize = min(cifs_sb->rsize,
2116                                              (tcon->ses->server->maxBuf -
2117                                               MAX_CIFS_HDR_SIZE));
2118         }
2119
2120         /* volume_info.password is freed above when existing session found
2121         (in which case it is not needed anymore) but when new sesion is created
2122         the password ptr is put in the new session structure (in which case the
2123         password will be freed at unmount time) */
2124         kfree(volume_info.UNC);
2125         kfree(volume_info.prepath);
2126         FreeXid(xid);
2127         return rc;
2128 }
2129
2130 static int
2131 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2132               char session_key[CIFS_SESS_KEY_SIZE],
2133               const struct nls_table *nls_codepage)
2134 {
2135         struct smb_hdr *smb_buffer;
2136         struct smb_hdr *smb_buffer_response;
2137         SESSION_SETUP_ANDX *pSMB;
2138         SESSION_SETUP_ANDX *pSMBr;
2139         char *bcc_ptr;
2140         char *user;
2141         char *domain;
2142         int rc = 0;
2143         int remaining_words = 0;
2144         int bytes_returned = 0;
2145         int len;
2146         __u32 capabilities;
2147         __u16 count;
2148
2149         cFYI(1, ("In sesssetup"));
2150         if (ses == NULL)
2151                 return -EINVAL;
2152         user = ses->userName;
2153         domain = ses->domainName;
2154         smb_buffer = cifs_buf_get();
2155         if (smb_buffer == NULL) {
2156                 return -ENOMEM;
2157         }
2158         smb_buffer_response = smb_buffer;
2159         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2160
2161         /* send SMBsessionSetup here */
2162         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2163                         NULL /* no tCon exists yet */ , 13 /* wct */ );
2164
2165         smb_buffer->Mid = GetNextMid(ses->server);
2166         pSMB->req_no_secext.AndXCommand = 0xFF;
2167         pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2168         pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2169
2170         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2171                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2172
2173         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2174                 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2175         if (ses->capabilities & CAP_UNICODE) {
2176                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2177                 capabilities |= CAP_UNICODE;
2178         }
2179         if (ses->capabilities & CAP_STATUS32) {
2180                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2181                 capabilities |= CAP_STATUS32;
2182         }
2183         if (ses->capabilities & CAP_DFS) {
2184                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2185                 capabilities |= CAP_DFS;
2186         }
2187         pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2188
2189         pSMB->req_no_secext.CaseInsensitivePasswordLength =
2190                 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2191
2192         pSMB->req_no_secext.CaseSensitivePasswordLength =
2193             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2194         bcc_ptr = pByteArea(smb_buffer);
2195         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2196         bcc_ptr += CIFS_SESS_KEY_SIZE;
2197         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2198         bcc_ptr += CIFS_SESS_KEY_SIZE;
2199
2200         if (ses->capabilities & CAP_UNICODE) {
2201                 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2202                         *bcc_ptr = 0;
2203                         bcc_ptr++;
2204                 }
2205                 if (user == NULL)
2206                         bytes_returned = 0; /* skip null user */
2207                 else
2208                         bytes_returned =
2209                                 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2210                                         nls_codepage);
2211                 /* convert number of 16 bit words to bytes */
2212                 bcc_ptr += 2 * bytes_returned;
2213                 bcc_ptr += 2;   /* trailing null */
2214                 if (domain == NULL)
2215                         bytes_returned =
2216                             cifs_strtoUCS((__le16 *) bcc_ptr,
2217                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2218                 else
2219                         bytes_returned =
2220                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2221                                           nls_codepage);
2222                 bcc_ptr += 2 * bytes_returned;
2223                 bcc_ptr += 2;
2224                 bytes_returned =
2225                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2226                                   32, nls_codepage);
2227                 bcc_ptr += 2 * bytes_returned;
2228                 bytes_returned =
2229                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release,
2230                                   32, nls_codepage);
2231                 bcc_ptr += 2 * bytes_returned;
2232                 bcc_ptr += 2;
2233                 bytes_returned =
2234                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2235                                   64, nls_codepage);
2236                 bcc_ptr += 2 * bytes_returned;
2237                 bcc_ptr += 2;
2238         } else {
2239                 if (user != NULL) {
2240                     strncpy(bcc_ptr, user, 200);
2241                     bcc_ptr += strnlen(user, 200);
2242                 }
2243                 *bcc_ptr = 0;
2244                 bcc_ptr++;
2245                 if (domain == NULL) {
2246                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2247                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2248                 } else {
2249                         strncpy(bcc_ptr, domain, 64);
2250                         bcc_ptr += strnlen(domain, 64);
2251                         *bcc_ptr = 0;
2252                         bcc_ptr++;
2253                 }
2254                 strcpy(bcc_ptr, "Linux version ");
2255                 bcc_ptr += strlen("Linux version ");
2256                 strcpy(bcc_ptr, utsname()->release);
2257                 bcc_ptr += strlen(utsname()->release) + 1;
2258                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2259                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2260         }
2261         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2262         smb_buffer->smb_buf_length += count;
2263         pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2264
2265         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2266                          &bytes_returned, 1);
2267         if (rc) {
2268 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2269         } else if ((smb_buffer_response->WordCount == 3)
2270                    || (smb_buffer_response->WordCount == 4)) {
2271                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2272                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2273                 if (action & GUEST_LOGIN)
2274                         cFYI(1, (" Guest login"));      /* do we want to mark SesInfo struct ? */
2275                 ses->Suid = smb_buffer_response->Uid;   /* UID left in wire format (le) */
2276                 cFYI(1, ("UID = %d ", ses->Suid));
2277          /* response can have either 3 or 4 word count - Samba sends 3 */
2278                 bcc_ptr = pByteArea(smb_buffer_response);
2279                 if ((pSMBr->resp.hdr.WordCount == 3)
2280                     || ((pSMBr->resp.hdr.WordCount == 4)
2281                         && (blob_len < pSMBr->resp.ByteCount))) {
2282                         if (pSMBr->resp.hdr.WordCount == 4)
2283                                 bcc_ptr += blob_len;
2284
2285                         if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2286                                 if ((long) (bcc_ptr) % 2) {
2287                                         remaining_words =
2288                                             (BCC(smb_buffer_response) - 1) /2;
2289                                         bcc_ptr++;      /* Unicode strings must be word aligned */
2290                                 } else {
2291                                         remaining_words =
2292                                                 BCC(smb_buffer_response) / 2;
2293                                 }
2294                                 len =
2295                                     UniStrnlen((wchar_t *) bcc_ptr,
2296                                                remaining_words - 1);
2297 /* We look for obvious messed up bcc or strings in response so we do not go off
2298    the end since (at least) WIN2K and Windows XP have a major bug in not null
2299    terminating last Unicode string in response  */
2300                                 if(ses->serverOS)
2301                                         kfree(ses->serverOS);
2302                                 ses->serverOS = kzalloc(2 * (len + 1), GFP_KERNEL);
2303                                 if(ses->serverOS == NULL)
2304                                         goto sesssetup_nomem;
2305                                 cifs_strfromUCS_le(ses->serverOS,
2306                                            (__le16 *)bcc_ptr, len,nls_codepage);
2307                                 bcc_ptr += 2 * (len + 1);
2308                                 remaining_words -= len + 1;
2309                                 ses->serverOS[2 * len] = 0;
2310                                 ses->serverOS[1 + (2 * len)] = 0;
2311                                 if (remaining_words > 0) {
2312                                         len = UniStrnlen((wchar_t *)bcc_ptr,
2313                                                          remaining_words-1);
2314                                         kfree(ses->serverNOS);
2315                                         ses->serverNOS = kzalloc(2 * (len + 1),GFP_KERNEL);
2316                                         if(ses->serverNOS == NULL)
2317                                                 goto sesssetup_nomem;
2318                                         cifs_strfromUCS_le(ses->serverNOS,
2319                                                            (__le16 *)bcc_ptr,len,nls_codepage);
2320                                         bcc_ptr += 2 * (len + 1);
2321                                         ses->serverNOS[2 * len] = 0;
2322                                         ses->serverNOS[1 + (2 * len)] = 0;
2323                                         if(strncmp(ses->serverNOS,
2324                                                 "NT LAN Manager 4",16) == 0) {
2325                                                 cFYI(1,("NT4 server"));
2326                                                 ses->flags |= CIFS_SES_NT4;
2327                                         }
2328                                         remaining_words -= len + 1;
2329                                         if (remaining_words > 0) {
2330                                                 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2331           /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2332                                                 if(ses->serverDomain)
2333                                                         kfree(ses->serverDomain);
2334                                                 ses->serverDomain =
2335                                                     kzalloc(2*(len+1),GFP_KERNEL);
2336                                                 if(ses->serverDomain == NULL)
2337                                                         goto sesssetup_nomem;
2338                                                 cifs_strfromUCS_le(ses->serverDomain,
2339                                                      (__le16 *)bcc_ptr,len,nls_codepage);
2340                                                 bcc_ptr += 2 * (len + 1);
2341                                                 ses->serverDomain[2*len] = 0;
2342                                                 ses->serverDomain[1+(2*len)] = 0;
2343                                         } /* else no more room so create dummy domain string */
2344                                         else {
2345                                                 if(ses->serverDomain)
2346                                                         kfree(ses->serverDomain);
2347                                                 ses->serverDomain =
2348                                                         kzalloc(2, GFP_KERNEL);
2349                                         }
2350                                 } else {        /* no room so create dummy domain and NOS string */
2351                                         /* if these kcallocs fail not much we
2352                                            can do, but better to not fail the
2353                                            sesssetup itself */
2354                                         kfree(ses->serverDomain);
2355                                         ses->serverDomain =
2356                                             kzalloc(2, GFP_KERNEL);
2357                                         kfree(ses->serverNOS);
2358                                         ses->serverNOS =
2359                                             kzalloc(2, GFP_KERNEL);
2360                                 }
2361                         } else {        /* ASCII */
2362                                 len = strnlen(bcc_ptr, 1024);
2363                                 if (((long) bcc_ptr + len) - (long)
2364                                     pByteArea(smb_buffer_response)
2365                                             <= BCC(smb_buffer_response)) {
2366                                         kfree(ses->serverOS);
2367                                         ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
2368                                         if(ses->serverOS == NULL)
2369                                                 goto sesssetup_nomem;
2370                                         strncpy(ses->serverOS,bcc_ptr, len);
2371
2372                                         bcc_ptr += len;
2373                                         bcc_ptr[0] = 0; /* null terminate the string */
2374                                         bcc_ptr++;
2375
2376                                         len = strnlen(bcc_ptr, 1024);
2377                                         kfree(ses->serverNOS);
2378                                         ses->serverNOS = kzalloc(len + 1,GFP_KERNEL);
2379                                         if(ses->serverNOS == NULL)
2380                                                 goto sesssetup_nomem;
2381                                         strncpy(ses->serverNOS, bcc_ptr, len);
2382                                         bcc_ptr += len;
2383                                         bcc_ptr[0] = 0;
2384                                         bcc_ptr++;
2385
2386                                         len = strnlen(bcc_ptr, 1024);
2387                                         if(ses->serverDomain)
2388                                                 kfree(ses->serverDomain);
2389                                         ses->serverDomain = kzalloc(len + 1,GFP_KERNEL);
2390                                         if(ses->serverDomain == NULL)
2391                                                 goto sesssetup_nomem;
2392                                         strncpy(ses->serverDomain, bcc_ptr, len);
2393                                         bcc_ptr += len;
2394                                         bcc_ptr[0] = 0;
2395                                         bcc_ptr++;
2396                                 } else
2397                                         cFYI(1,
2398                                              ("Variable field of length %d extends beyond end of smb ",
2399                                               len));
2400                         }
2401                 } else {
2402                         cERROR(1,
2403                                (" Security Blob Length extends beyond end of SMB"));
2404                 }
2405         } else {
2406                 cERROR(1,
2407                        (" Invalid Word count %d: ",
2408                         smb_buffer_response->WordCount));
2409                 rc = -EIO;
2410         }
2411 sesssetup_nomem:        /* do not return an error on nomem for the info strings,
2412                            since that could make reconnection harder, and
2413                            reconnection might be needed to free memory */
2414         if (smb_buffer)
2415                 cifs_buf_release(smb_buffer);
2416
2417         return rc;
2418 }
2419
2420 static int
2421 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2422                               struct cifsSesInfo *ses, int * pNTLMv2_flag,
2423                               const struct nls_table *nls_codepage)
2424 {
2425         struct smb_hdr *smb_buffer;
2426         struct smb_hdr *smb_buffer_response;
2427         SESSION_SETUP_ANDX *pSMB;
2428         SESSION_SETUP_ANDX *pSMBr;
2429         char *bcc_ptr;
2430         char *domain;
2431         int rc = 0;
2432         int remaining_words = 0;
2433         int bytes_returned = 0;
2434         int len;
2435         int SecurityBlobLength = sizeof (NEGOTIATE_MESSAGE);
2436         PNEGOTIATE_MESSAGE SecurityBlob;
2437         PCHALLENGE_MESSAGE SecurityBlob2;
2438         __u32 negotiate_flags, capabilities;
2439         __u16 count;
2440
2441         cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
2442         if(ses == NULL)
2443                 return -EINVAL;
2444         domain = ses->domainName;
2445         *pNTLMv2_flag = FALSE;
2446         smb_buffer = cifs_buf_get();
2447         if (smb_buffer == NULL) {
2448                 return -ENOMEM;
2449         }
2450         smb_buffer_response = smb_buffer;
2451         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2452         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2453
2454         /* send SMBsessionSetup here */
2455         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2456                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2457
2458         smb_buffer->Mid = GetNextMid(ses->server);
2459         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2460         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2461
2462         pSMB->req.AndXCommand = 0xFF;
2463         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2464         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2465
2466         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2467                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2468
2469         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2470             CAP_EXTENDED_SECURITY;
2471         if (ses->capabilities & CAP_UNICODE) {
2472                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2473                 capabilities |= CAP_UNICODE;
2474         }
2475         if (ses->capabilities & CAP_STATUS32) {
2476                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2477                 capabilities |= CAP_STATUS32;
2478         }
2479         if (ses->capabilities & CAP_DFS) {
2480                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2481                 capabilities |= CAP_DFS;
2482         }
2483         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2484
2485         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2486         SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2487         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2488         SecurityBlob->MessageType = NtLmNegotiate;
2489         negotiate_flags =
2490             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2491             NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
2492             NTLMSSP_NEGOTIATE_56 |
2493             /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2494         if(sign_CIFS_PDUs)
2495                 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2496 /*      if(ntlmv2_support)
2497                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;*/
2498         /* setup pointers to domain name and workstation name */
2499         bcc_ptr += SecurityBlobLength;
2500
2501         SecurityBlob->WorkstationName.Buffer = 0;
2502         SecurityBlob->WorkstationName.Length = 0;
2503         SecurityBlob->WorkstationName.MaximumLength = 0;
2504
2505         /* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
2506         along with username on auth request (ie the response to challenge) */
2507         SecurityBlob->DomainName.Buffer = 0;
2508         SecurityBlob->DomainName.Length = 0;
2509         SecurityBlob->DomainName.MaximumLength = 0;
2510         if (ses->capabilities & CAP_UNICODE) {
2511                 if ((long) bcc_ptr % 2) {
2512                         *bcc_ptr = 0;
2513                         bcc_ptr++;
2514                 }
2515
2516                 bytes_returned =
2517                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2518                                   32, nls_codepage);
2519                 bcc_ptr += 2 * bytes_returned;
2520                 bytes_returned =
2521                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
2522                                   nls_codepage);
2523                 bcc_ptr += 2 * bytes_returned;
2524                 bcc_ptr += 2;   /* null terminate Linux version */
2525                 bytes_returned =
2526                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2527                                   64, nls_codepage);
2528                 bcc_ptr += 2 * bytes_returned;
2529                 *(bcc_ptr + 1) = 0;
2530                 *(bcc_ptr + 2) = 0;
2531                 bcc_ptr += 2;   /* null terminate network opsys string */
2532                 *(bcc_ptr + 1) = 0;
2533                 *(bcc_ptr + 2) = 0;
2534                 bcc_ptr += 2;   /* null domain */
2535         } else {                /* ASCII */
2536                 strcpy(bcc_ptr, "Linux version ");
2537                 bcc_ptr += strlen("Linux version ");
2538                 strcpy(bcc_ptr, utsname()->release);
2539                 bcc_ptr += strlen(utsname()->release) + 1;
2540                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2541                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2542                 bcc_ptr++;      /* empty domain field */
2543                 *bcc_ptr = 0;
2544         }
2545         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2546         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2547         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2548         smb_buffer->smb_buf_length += count;
2549         pSMB->req.ByteCount = cpu_to_le16(count);
2550
2551         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2552                          &bytes_returned, 1);
2553
2554         if (smb_buffer_response->Status.CifsError ==
2555             cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
2556                 rc = 0;
2557
2558         if (rc) {
2559 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2560         } else if ((smb_buffer_response->WordCount == 3)
2561                    || (smb_buffer_response->WordCount == 4)) {
2562                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2563                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2564
2565                 if (action & GUEST_LOGIN)
2566                         cFYI(1, (" Guest login"));
2567         /* Do we want to set anything in SesInfo struct when guest login? */
2568
2569                 bcc_ptr = pByteArea(smb_buffer_response);
2570         /* response can have either 3 or 4 word count - Samba sends 3 */
2571
2572                 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
2573                 if (SecurityBlob2->MessageType != NtLmChallenge) {
2574                         cFYI(1,
2575                              ("Unexpected NTLMSSP message type received %d",
2576                               SecurityBlob2->MessageType));
2577                 } else if (ses) {
2578                         ses->Suid = smb_buffer_response->Uid; /* UID left in le format */
2579                         cFYI(1, ("UID = %d", ses->Suid));
2580                         if ((pSMBr->resp.hdr.WordCount == 3)
2581                             || ((pSMBr->resp.hdr.WordCount == 4)
2582                                 && (blob_len <
2583                                     pSMBr->resp.ByteCount))) {
2584
2585                                 if (pSMBr->resp.hdr.WordCount == 4) {
2586                                         bcc_ptr += blob_len;
2587                                         cFYI(1, ("Security Blob Length %d",
2588                                               blob_len));
2589                                 }
2590
2591                                 cFYI(1, ("NTLMSSP Challenge rcvd"));
2592
2593                                 memcpy(ses->server->cryptKey,
2594                                        SecurityBlob2->Challenge,
2595                                        CIFS_CRYPTO_KEY_SIZE);
2596                                 if(SecurityBlob2->NegotiateFlags &
2597                                         cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
2598                                         *pNTLMv2_flag = TRUE;
2599
2600                                 if((SecurityBlob2->NegotiateFlags &
2601                                         cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN))
2602                                         || (sign_CIFS_PDUs > 1))
2603                                                 ses->server->secMode |=
2604                                                         SECMODE_SIGN_REQUIRED;
2605                                 if ((SecurityBlob2->NegotiateFlags &
2606                                         cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
2607                                                 ses->server->secMode |=
2608                                                         SECMODE_SIGN_ENABLED;
2609
2610                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2611                                         if ((long) (bcc_ptr) % 2) {
2612                                                 remaining_words =
2613                                                     (BCC(smb_buffer_response)
2614                                                      - 1) / 2;
2615                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
2616                                         } else {
2617                                                 remaining_words =
2618                                                     BCC
2619                                                     (smb_buffer_response) / 2;
2620                                         }
2621                                         len =
2622                                             UniStrnlen((wchar_t *) bcc_ptr,
2623                                                        remaining_words - 1);
2624 /* We look for obvious messed up bcc or strings in response so we do not go off
2625    the end since (at least) WIN2K and Windows XP have a major bug in not null
2626    terminating last Unicode string in response  */
2627                                         if(ses->serverOS)
2628                                                 kfree(ses->serverOS);
2629                                         ses->serverOS =
2630                                             kzalloc(2 * (len + 1), GFP_KERNEL);
2631                                         cifs_strfromUCS_le(ses->serverOS,
2632                                                            (__le16 *)
2633                                                            bcc_ptr, len,
2634                                                            nls_codepage);
2635                                         bcc_ptr += 2 * (len + 1);
2636                                         remaining_words -= len + 1;
2637                                         ses->serverOS[2 * len] = 0;
2638                                         ses->serverOS[1 + (2 * len)] = 0;
2639                                         if (remaining_words > 0) {
2640                                                 len = UniStrnlen((wchar_t *)
2641                                                                  bcc_ptr,
2642                                                                  remaining_words
2643                                                                  - 1);
2644                                                 kfree(ses->serverNOS);
2645                                                 ses->serverNOS =
2646                                                     kzalloc(2 * (len + 1),
2647                                                             GFP_KERNEL);
2648                                                 cifs_strfromUCS_le(ses->
2649                                                                    serverNOS,
2650                                                                    (__le16 *)
2651                                                                    bcc_ptr,
2652                                                                    len,
2653                                                                    nls_codepage);
2654                                                 bcc_ptr += 2 * (len + 1);
2655                                                 ses->serverNOS[2 * len] = 0;
2656                                                 ses->serverNOS[1 +
2657                                                                (2 * len)] = 0;
2658                                                 remaining_words -= len + 1;
2659                                                 if (remaining_words > 0) {
2660                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2661            /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2662                                                         kfree(ses->serverDomain);
2663                                                         ses->serverDomain =
2664                                                             kzalloc(2 *
2665                                                                     (len +
2666                                                                      1),
2667                                                                     GFP_KERNEL);
2668                                                         cifs_strfromUCS_le
2669                                                             (ses->serverDomain,
2670                                                              (__le16 *)bcc_ptr,
2671                                                              len, nls_codepage);
2672                                                         bcc_ptr +=
2673                                                             2 * (len + 1);
2674                                                         ses->serverDomain[2*len]
2675                                                             = 0;
2676                                                         ses->serverDomain
2677                                                                 [1 + (2 * len)]
2678                                                             = 0;
2679                                                 } /* else no more room so create dummy domain string */
2680                                                 else {
2681                                                         kfree(ses->serverDomain);
2682                                                         ses->serverDomain =
2683                                                             kzalloc(2,
2684                                                                     GFP_KERNEL);
2685                                                 }
2686                                         } else {        /* no room so create dummy domain and NOS string */
2687                                                 kfree(ses->serverDomain);
2688                                                 ses->serverDomain =
2689                                                     kzalloc(2, GFP_KERNEL);
2690                                                 kfree(ses->serverNOS);
2691                                                 ses->serverNOS =
2692                                                     kzalloc(2, GFP_KERNEL);
2693                                         }
2694                                 } else {        /* ASCII */
2695                                         len = strnlen(bcc_ptr, 1024);
2696                                         if (((long) bcc_ptr + len) - (long)
2697                                             pByteArea(smb_buffer_response)
2698                                             <= BCC(smb_buffer_response)) {
2699                                                 if(ses->serverOS)
2700                                                         kfree(ses->serverOS);
2701                                                 ses->serverOS =
2702                                                     kzalloc(len + 1,
2703                                                             GFP_KERNEL);
2704                                                 strncpy(ses->serverOS,
2705                                                         bcc_ptr, len);
2706
2707                                                 bcc_ptr += len;
2708                                                 bcc_ptr[0] = 0; /* null terminate string */
2709                                                 bcc_ptr++;
2710
2711                                                 len = strnlen(bcc_ptr, 1024);
2712                                                 kfree(ses->serverNOS);
2713                                                 ses->serverNOS =
2714                                                     kzalloc(len + 1,
2715                                                             GFP_KERNEL);
2716                                                 strncpy(ses->serverNOS, bcc_ptr, len);
2717                                                 bcc_ptr += len;
2718                                                 bcc_ptr[0] = 0;
2719                                                 bcc_ptr++;
2720
2721                                                 len = strnlen(bcc_ptr, 1024);
2722                                                 kfree(ses->serverDomain);
2723                                                 ses->serverDomain =
2724                                                     kzalloc(len + 1,
2725                                                             GFP_KERNEL);
2726                                                 strncpy(ses->serverDomain, bcc_ptr, len);
2727                                                 bcc_ptr += len;
2728                                                 bcc_ptr[0] = 0;
2729                                                 bcc_ptr++;
2730                                         } else
2731                                                 cFYI(1,
2732                                                      ("Variable field of length %d extends beyond end of smb",
2733                                                       len));
2734                                 }
2735                         } else {
2736                                 cERROR(1,
2737                                        (" Security Blob Length extends beyond end of SMB"));
2738                         }
2739                 } else {
2740                         cERROR(1, ("No session structure passed in."));
2741                 }
2742         } else {
2743                 cERROR(1,
2744                        (" Invalid Word count %d:",
2745                         smb_buffer_response->WordCount));
2746                 rc = -EIO;
2747         }
2748
2749         if (smb_buffer)
2750                 cifs_buf_release(smb_buffer);
2751
2752         return rc;
2753 }
2754 static int
2755 CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2756                 char *ntlm_session_key, int ntlmv2_flag,
2757                 const struct nls_table *nls_codepage)
2758 {
2759         struct smb_hdr *smb_buffer;
2760         struct smb_hdr *smb_buffer_response;
2761         SESSION_SETUP_ANDX *pSMB;
2762         SESSION_SETUP_ANDX *pSMBr;
2763         char *bcc_ptr;
2764         char *user;
2765         char *domain;
2766         int rc = 0;
2767         int remaining_words = 0;
2768         int bytes_returned = 0;
2769         int len;
2770         int SecurityBlobLength = sizeof (AUTHENTICATE_MESSAGE);
2771         PAUTHENTICATE_MESSAGE SecurityBlob;
2772         __u32 negotiate_flags, capabilities;
2773         __u16 count;
2774
2775         cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
2776         if(ses == NULL)
2777                 return -EINVAL;
2778         user = ses->userName;
2779         domain = ses->domainName;
2780         smb_buffer = cifs_buf_get();
2781         if (smb_buffer == NULL) {
2782                 return -ENOMEM;
2783         }
2784         smb_buffer_response = smb_buffer;
2785         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2786         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2787
2788         /* send SMBsessionSetup here */
2789         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2790                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2791
2792         smb_buffer->Mid = GetNextMid(ses->server);
2793         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2794         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2795         pSMB->req.AndXCommand = 0xFF;
2796         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2797         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2798
2799         pSMB->req.hdr.Uid = ses->Suid;
2800
2801         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2802                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2803
2804         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2805             CAP_EXTENDED_SECURITY;
2806         if (ses->capabilities & CAP_UNICODE) {
2807                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2808                 capabilities |= CAP_UNICODE;
2809         }
2810         if (ses->capabilities & CAP_STATUS32) {
2811                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2812                 capabilities |= CAP_STATUS32;
2813         }
2814         if (ses->capabilities & CAP_DFS) {
2815                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2816                 capabilities |= CAP_DFS;
2817         }
2818         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2819
2820         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2821         SecurityBlob = (PAUTHENTICATE_MESSAGE) bcc_ptr;
2822         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2823         SecurityBlob->MessageType = NtLmAuthenticate;
2824         bcc_ptr += SecurityBlobLength;
2825         negotiate_flags =
2826             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
2827             NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
2828             0x80000000 | NTLMSSP_NEGOTIATE_128;
2829         if(sign_CIFS_PDUs)
2830                 negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
2831         if(ntlmv2_flag)
2832                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
2833
2834 /* setup pointers to domain name and workstation name */
2835
2836         SecurityBlob->WorkstationName.Buffer = 0;
2837         SecurityBlob->WorkstationName.Length = 0;
2838         SecurityBlob->WorkstationName.MaximumLength = 0;
2839         SecurityBlob->SessionKey.Length = 0;
2840         SecurityBlob->SessionKey.MaximumLength = 0;
2841         SecurityBlob->SessionKey.Buffer = 0;
2842
2843         SecurityBlob->LmChallengeResponse.Length = 0;
2844         SecurityBlob->LmChallengeResponse.MaximumLength = 0;
2845         SecurityBlob->LmChallengeResponse.Buffer = 0;
2846
2847         SecurityBlob->NtChallengeResponse.Length =
2848             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2849         SecurityBlob->NtChallengeResponse.MaximumLength =
2850             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2851         memcpy(bcc_ptr, ntlm_session_key, CIFS_SESS_KEY_SIZE);
2852         SecurityBlob->NtChallengeResponse.Buffer =
2853             cpu_to_le32(SecurityBlobLength);
2854         SecurityBlobLength += CIFS_SESS_KEY_SIZE;
2855         bcc_ptr += CIFS_SESS_KEY_SIZE;
2856
2857         if (ses->capabilities & CAP_UNICODE) {
2858                 if (domain == NULL) {
2859                         SecurityBlob->DomainName.Buffer = 0;
2860                         SecurityBlob->DomainName.Length = 0;
2861                         SecurityBlob->DomainName.MaximumLength = 0;
2862                 } else {
2863                         __u16 len =
2864                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2865                                           nls_codepage);
2866                         len *= 2;
2867                         SecurityBlob->DomainName.MaximumLength =
2868                             cpu_to_le16(len);
2869                         SecurityBlob->DomainName.Buffer =
2870                             cpu_to_le32(SecurityBlobLength);
2871                         bcc_ptr += len;
2872                         SecurityBlobLength += len;
2873                         SecurityBlob->DomainName.Length =
2874                             cpu_to_le16(len);
2875                 }
2876                 if (user == NULL) {
2877                         SecurityBlob->UserName.Buffer = 0;
2878                         SecurityBlob->UserName.Length = 0;
2879                         SecurityBlob->UserName.MaximumLength = 0;
2880                 } else {
2881                         __u16 len =
2882                             cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
2883                                           nls_codepage);
2884                         len *= 2;
2885                         SecurityBlob->UserName.MaximumLength =
2886                             cpu_to_le16(len);
2887                         SecurityBlob->UserName.Buffer =
2888                             cpu_to_le32(SecurityBlobLength);
2889                         bcc_ptr += len;
2890                         SecurityBlobLength += len;
2891                         SecurityBlob->UserName.Length =
2892                             cpu_to_le16(len);
2893                 }
2894
2895                 /* SecurityBlob->WorkstationName.Length = cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
2896                    SecurityBlob->WorkstationName.Length *= 2;
2897                    SecurityBlob->WorkstationName.MaximumLength = cpu_to_le16(SecurityBlob->WorkstationName.Length);
2898                    SecurityBlob->WorkstationName.Buffer = cpu_to_le32(SecurityBlobLength);
2899                    bcc_ptr += SecurityBlob->WorkstationName.Length;
2900                    SecurityBlobLength += SecurityBlob->WorkstationName.Length;
2901                    SecurityBlob->WorkstationName.Length = cpu_to_le16(SecurityBlob->WorkstationName.Length);  */
2902
2903                 if ((long) bcc_ptr % 2) {
2904                         *bcc_ptr = 0;
2905                         bcc_ptr++;
2906                 }
2907                 bytes_returned =
2908                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2909                                   32, nls_codepage);
2910                 bcc_ptr += 2 * bytes_returned;
2911                 bytes_returned =
2912                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
2913                                   nls_codepage);
2914                 bcc_ptr += 2 * bytes_returned;
2915                 bcc_ptr += 2;   /* null term version string */
2916                 bytes_returned =
2917                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2918                                   64, nls_codepage);
2919                 bcc_ptr += 2 * bytes_returned;
2920                 *(bcc_ptr + 1) = 0;
2921                 *(bcc_ptr + 2) = 0;
2922                 bcc_ptr += 2;   /* null terminate network opsys string */
2923                 *(bcc_ptr + 1) = 0;
2924                 *(bcc_ptr + 2) = 0;
2925                 bcc_ptr += 2;   /* null domain */
2926         } else {                /* ASCII */
2927                 if (domain == NULL) {
2928                         SecurityBlob->DomainName.Buffer = 0;
2929                         SecurityBlob->DomainName.Length = 0;
2930                         SecurityBlob->DomainName.MaximumLength = 0;
2931                 } else {
2932                         __u16 len;
2933                         negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
2934                         strncpy(bcc_ptr, domain, 63);
2935                         len = strnlen(domain, 64);
2936                         SecurityBlob->DomainName.MaximumLength =
2937                             cpu_to_le16(len);
2938                         SecurityBlob->DomainName.Buffer =
2939                             cpu_to_le32(SecurityBlobLength);
2940                         bcc_ptr += len;
2941                         SecurityBlobLength += len;
2942                         SecurityBlob->DomainName.Length = cpu_to_le16(len);
2943                 }
2944                 if (user == NULL) {
2945                         SecurityBlob->UserName.Buffer = 0;
2946                         SecurityBlob->UserName.Length = 0;
2947                         SecurityBlob->UserName.MaximumLength = 0;
2948                 } else {
2949                         __u16 len;
2950                         strncpy(bcc_ptr, user, 63);
2951                         len = strnlen(user, 64);
2952                         SecurityBlob->UserName.MaximumLength =
2953                             cpu_to_le16(len);
2954                         SecurityBlob->UserName.Buffer =
2955                             cpu_to_le32(SecurityBlobLength);
2956                         bcc_ptr += len;
2957                         SecurityBlobLength += len;
2958                         SecurityBlob->UserName.Length = cpu_to_le16(len);
2959                 }
2960                 /* BB fill in our workstation name if known BB */
2961
2962                 strcpy(bcc_ptr, "Linux version ");
2963                 bcc_ptr += strlen("Linux version ");
2964                 strcpy(bcc_ptr, utsname()->release);
2965                 bcc_ptr += strlen(utsname()->release) + 1;
2966                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2967                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2968                 bcc_ptr++;      /* null domain */
2969                 *bcc_ptr = 0;
2970         }
2971         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2972         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2973         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2974         smb_buffer->smb_buf_length += count;
2975         pSMB->req.ByteCount = cpu_to_le16(count);
2976
2977         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2978                          &bytes_returned, 1);
2979         if (rc) {
2980 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2981         } else if ((smb_buffer_response->WordCount == 3)
2982                    || (smb_buffer_response->WordCount == 4)) {
2983                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2984                 __u16 blob_len =
2985                     le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2986                 if (action & GUEST_LOGIN)
2987                         cFYI(1, (" Guest login"));      /* BB do we want to set anything in SesInfo struct ? */
2988 /*        if(SecurityBlob2->MessageType != NtLm??){
2989                  cFYI("Unexpected message type on auth response is %d "));
2990         } */
2991                 if (ses) {
2992                         cFYI(1,
2993                              ("Does UID on challenge %d match auth response UID %d ",
2994                               ses->Suid, smb_buffer_response->Uid));
2995                         ses->Suid = smb_buffer_response->Uid; /* UID left in wire format */
2996                         bcc_ptr = pByteArea(smb_buffer_response);
2997             /* response can have either 3 or 4 word count - Samba sends 3 */
2998                         if ((pSMBr->resp.hdr.WordCount == 3)
2999                             || ((pSMBr->resp.hdr.WordCount == 4)
3000                                 && (blob_len <
3001                                     pSMBr->resp.ByteCount))) {
3002                                 if (pSMBr->resp.hdr.WordCount == 4) {
3003                                         bcc_ptr +=
3004                                             blob_len;
3005                                         cFYI(1,
3006                                              ("Security Blob Length %d ",
3007                                               blob_len));
3008                                 }
3009
3010                                 cFYI(1,
3011                                      ("NTLMSSP response to Authenticate "));
3012
3013                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3014                                         if ((long) (bcc_ptr) % 2) {
3015                                                 remaining_words =
3016                                                     (BCC(smb_buffer_response)
3017                                                      - 1) / 2;
3018                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
3019                                         } else {
3020                                                 remaining_words = BCC(smb_buffer_response) / 2;
3021                                         }
3022                                         len =
3023                                             UniStrnlen((wchar_t *) bcc_ptr,remaining_words - 1);
3024 /* We look for obvious messed up bcc or strings in response so we do not go off
3025   the end since (at least) WIN2K and Windows XP have a major bug in not null
3026   terminating last Unicode string in response  */
3027                                         if(ses->serverOS)
3028                                                 kfree(ses->serverOS);
3029                                         ses->serverOS =
3030                                             kzalloc(2 * (len + 1), GFP_KERNEL);
3031                                         cifs_strfromUCS_le(ses->serverOS,
3032                                                            (__le16 *)
3033                                                            bcc_ptr, len,
3034                                                            nls_codepage);
3035                                         bcc_ptr += 2 * (len + 1);
3036                                         remaining_words -= len + 1;
3037                                         ses->serverOS[2 * len] = 0;
3038                                         ses->serverOS[1 + (2 * len)] = 0;
3039                                         if (remaining_words > 0) {
3040                                                 len = UniStrnlen((wchar_t *)
3041                                                                  bcc_ptr,
3042                                                                  remaining_words
3043                                                                  - 1);
3044                                                 kfree(ses->serverNOS);
3045                                                 ses->serverNOS =
3046                                                     kzalloc(2 * (len + 1),
3047                                                             GFP_KERNEL);
3048                                                 cifs_strfromUCS_le(ses->
3049                                                                    serverNOS,
3050                                                                    (__le16 *)
3051                                                                    bcc_ptr,
3052                                                                    len,
3053                                                                    nls_codepage);
3054                                                 bcc_ptr += 2 * (len + 1);
3055                                                 ses->serverNOS[2 * len] = 0;
3056                                                 ses->serverNOS[1+(2*len)] = 0;
3057                                                 remaining_words -= len + 1;
3058                                                 if (remaining_words > 0) {
3059                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3060      /* last string not always null terminated (e.g. for Windows XP & 2000) */
3061                                                         if(ses->serverDomain)
3062                                                                 kfree(ses->serverDomain);
3063                                                         ses->serverDomain =
3064                                                             kzalloc(2 *
3065                                                                     (len +
3066                                                                      1),
3067                                                                     GFP_KERNEL);
3068                                                         cifs_strfromUCS_le
3069                                                             (ses->
3070                                                              serverDomain,
3071                                                              (__le16 *)
3072                                                              bcc_ptr, len,
3073                                                              nls_codepage);
3074                                                         bcc_ptr +=
3075                                                             2 * (len + 1);
3076                                                         ses->
3077                                                             serverDomain[2
3078                                                                          * len]
3079                                                             = 0;
3080                                                         ses->
3081                                                             serverDomain[1
3082                                                                          +
3083                                                                          (2
3084                                                                           *
3085                                                                           len)]
3086                                                             = 0;
3087                                                 } /* else no more room so create dummy domain string */
3088                                                 else {
3089                                                         if(ses->serverDomain)
3090                                                                 kfree(ses->serverDomain);
3091                                                         ses->serverDomain = kzalloc(2,GFP_KERNEL);
3092                                                 }
3093                                         } else {  /* no room so create dummy domain and NOS string */
3094                                                 if(ses->serverDomain)
3095                                                         kfree(ses->serverDomain);
3096                                                 ses->serverDomain = kzalloc(2, GFP_KERNEL);
3097                                                 kfree(ses->serverNOS);
3098                                                 ses->serverNOS = kzalloc(2, GFP_KERNEL);
3099                                         }
3100                                 } else {        /* ASCII */
3101                                         len = strnlen(bcc_ptr, 1024);
3102                                         if (((long) bcc_ptr + len) -
3103                         (long) pByteArea(smb_buffer_response)
3104                             <= BCC(smb_buffer_response)) {
3105                                                 if(ses->serverOS)
3106                                                         kfree(ses->serverOS);
3107                                                 ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
3108                                                 strncpy(ses->serverOS,bcc_ptr, len);
3109
3110                                                 bcc_ptr += len;
3111                                                 bcc_ptr[0] = 0; /* null terminate the string */
3112                                                 bcc_ptr++;
3113
3114                                                 len = strnlen(bcc_ptr, 1024);
3115                                                 kfree(ses->serverNOS);
3116                                                 ses->serverNOS = kzalloc(len+1,GFP_KERNEL);
3117                                                 strncpy(ses->serverNOS, bcc_ptr, len);
3118                                                 bcc_ptr += len;
3119                                                 bcc_ptr[0] = 0;
3120                                                 bcc_ptr++;
3121
3122                                                 len = strnlen(bcc_ptr, 1024);
3123                                                 if(ses->serverDomain)
3124                                                         kfree(ses->serverDomain);
3125                                                 ses->serverDomain = kzalloc(len+1,GFP_KERNEL);
3126                                                 strncpy(ses->serverDomain, bcc_ptr, len);
3127                                                 bcc_ptr += len;
3128                                                 bcc_ptr[0] = 0;
3129                                                 bcc_ptr++;
3130                                         } else
3131                                                 cFYI(1,
3132                                                      ("Variable field of length %d extends beyond end of smb ",
3133                                                       len));
3134                                 }
3135                         } else {
3136                                 cERROR(1,
3137                                        (" Security Blob Length extends beyond end of SMB"));
3138                         }
3139                 } else {
3140                         cERROR(1, ("No session structure passed in."));
3141                 }
3142         } else {
3143                 cERROR(1,
3144                        (" Invalid Word count %d: ",
3145                         smb_buffer_response->WordCount));
3146                 rc = -EIO;
3147         }
3148
3149         if (smb_buffer)
3150                 cifs_buf_release(smb_buffer);
3151
3152         return rc;
3153 }
3154
3155 int
3156 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
3157          const char *tree, struct cifsTconInfo *tcon,
3158          const struct nls_table *nls_codepage)
3159 {
3160         struct smb_hdr *smb_buffer;
3161         struct smb_hdr *smb_buffer_response;
3162         TCONX_REQ *pSMB;
3163         TCONX_RSP *pSMBr;
3164         unsigned char *bcc_ptr;
3165         int rc = 0;
3166         int length;
3167         __u16 count;
3168
3169         if (ses == NULL)
3170                 return -EIO;
3171
3172         smb_buffer = cifs_buf_get();
3173         if (smb_buffer == NULL) {
3174                 return -ENOMEM;
3175         }
3176         smb_buffer_response = smb_buffer;
3177
3178         header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3179                         NULL /*no tid */ , 4 /*wct */ );
3180
3181         smb_buffer->Mid = GetNextMid(ses->server);
3182         smb_buffer->Uid = ses->Suid;
3183         pSMB = (TCONX_REQ *) smb_buffer;
3184         pSMBr = (TCONX_RSP *) smb_buffer_response;
3185
3186         pSMB->AndXCommand = 0xFF;
3187         pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3188         bcc_ptr = &pSMB->Password[0];
3189         if((ses->server->secMode) & SECMODE_USER) {
3190                 pSMB->PasswordLength = cpu_to_le16(1);  /* minimum */
3191                 *bcc_ptr = 0; /* password is null byte */
3192                 bcc_ptr++;              /* skip password */
3193                 /* already aligned so no need to do it below */
3194         } else {
3195                 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
3196                 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3197                    specified as required (when that support is added to
3198                    the vfs in the future) as only NTLM or the much
3199                    weaker LANMAN (which we do not send by default) is accepted
3200                    by Samba (not sure whether other servers allow
3201                    NTLMv2 password here) */
3202 #ifdef CONFIG_CIFS_WEAK_PW_HASH
3203                 if((extended_security & CIFSSEC_MAY_LANMAN) &&
3204                         (ses->server->secType == LANMAN))
3205                         calc_lanman_hash(ses, bcc_ptr);
3206                 else
3207 #endif /* CIFS_WEAK_PW_HASH */
3208                 SMBNTencrypt(ses->password,
3209                              ses->server->cryptKey,
3210                              bcc_ptr);
3211
3212                 bcc_ptr += CIFS_SESS_KEY_SIZE;
3213                 if(ses->capabilities & CAP_UNICODE) {
3214                         /* must align unicode strings */
3215                         *bcc_ptr = 0; /* null byte password */
3216                         bcc_ptr++;
3217                 }
3218         }
3219
3220         if(ses->server->secMode &
3221                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3222                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3223
3224         if (ses->capabilities & CAP_STATUS32) {
3225                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3226         }
3227         if (ses->capabilities & CAP_DFS) {
3228                 smb_buffer->Flags2 |= SMBFLG2_DFS;
3229         }
3230         if (ses->capabilities & CAP_UNICODE) {
3231                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3232                 length =
3233                     cifs_strtoUCS((__le16 *) bcc_ptr, tree,
3234                         6 /* max utf8 char length in bytes */ *
3235                         (/* server len*/ + 256 /* share len */), nls_codepage);
3236                 bcc_ptr += 2 * length;  /* convert num 16 bit words to bytes */
3237                 bcc_ptr += 2;   /* skip trailing null */
3238         } else {                /* ASCII */
3239                 strcpy(bcc_ptr, tree);
3240                 bcc_ptr += strlen(tree) + 1;
3241         }
3242         strcpy(bcc_ptr, "?????");
3243         bcc_ptr += strlen("?????");
3244         bcc_ptr += 1;
3245         count = bcc_ptr - &pSMB->Password[0];
3246         pSMB->hdr.smb_buf_length += count;
3247         pSMB->ByteCount = cpu_to_le16(count);
3248
3249         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, 0);
3250
3251         /* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
3252         /* above now done in SendReceive */
3253         if ((rc == 0) && (tcon != NULL)) {
3254                 tcon->tidStatus = CifsGood;
3255                 tcon->tid = smb_buffer_response->Tid;
3256                 bcc_ptr = pByteArea(smb_buffer_response);
3257                 length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
3258         /* skip service field (NB: this field is always ASCII) */
3259                 bcc_ptr += length + 1;
3260                 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3261                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3262                         length = UniStrnlen((wchar_t *) bcc_ptr, 512);
3263                         if ((bcc_ptr + (2 * length)) -
3264                              pByteArea(smb_buffer_response) <=
3265                             BCC(smb_buffer_response)) {
3266                                 kfree(tcon->nativeFileSystem);
3267                                 tcon->nativeFileSystem =
3268                                     kzalloc(length + 2, GFP_KERNEL);
3269                                 cifs_strfromUCS_le(tcon->nativeFileSystem,
3270                                                    (__le16 *) bcc_ptr,
3271                                                    length, nls_codepage);
3272                                 bcc_ptr += 2 * length;
3273                                 bcc_ptr[0] = 0; /* null terminate the string */
3274                                 bcc_ptr[1] = 0;
3275                                 bcc_ptr += 2;
3276                         }
3277                         /* else do not bother copying these informational fields */
3278                 } else {
3279                         length = strnlen(bcc_ptr, 1024);
3280                         if ((bcc_ptr + length) -
3281                             pByteArea(smb_buffer_response) <=
3282                             BCC(smb_buffer_response)) {
3283                                 kfree(tcon->nativeFileSystem);
3284                                 tcon->nativeFileSystem =
3285                                     kzalloc(length + 1, GFP_KERNEL);
3286                                 strncpy(tcon->nativeFileSystem, bcc_ptr,
3287                                         length);
3288                         }
3289                         /* else do not bother copying these informational fields */
3290                 }
3291                 if((smb_buffer_response->WordCount == 3) ||
3292                          (smb_buffer_response->WordCount == 7))
3293                         /* field is in same location */
3294                         tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3295                 else
3296                         tcon->Flags = 0;
3297                 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
3298         } else if ((rc == 0) && tcon == NULL) {
3299         /* all we need to save for IPC$ connection */
3300                 ses->ipc_tid = smb_buffer_response->Tid;
3301         }
3302
3303         if (smb_buffer)
3304                 cifs_buf_release(smb_buffer);
3305         return rc;
3306 }
3307
3308 int
3309 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3310 {
3311         int rc = 0;
3312         int xid;
3313         struct cifsSesInfo *ses = NULL;
3314         struct task_struct *cifsd_task;
3315         char * tmp;
3316
3317         xid = GetXid();
3318
3319         if (cifs_sb->tcon) {
3320                 ses = cifs_sb->tcon->ses; /* save ptr to ses before delete tcon!*/
3321                 rc = CIFSSMBTDis(xid, cifs_sb->tcon);
3322                 if (rc == -EBUSY) {
3323                         FreeXid(xid);
3324                         return 0;
3325                 }
3326                 tconInfoFree(cifs_sb->tcon);
3327                 if ((ses) && (ses->server)) {
3328                         /* save off task so we do not refer to ses later */
3329                         cifsd_task = ses->server->tsk;
3330                         cFYI(1, ("About to do SMBLogoff "));
3331                         rc = CIFSSMBLogoff(xid, ses);
3332                         if (rc == -EBUSY) {
3333                                 FreeXid(xid);
3334                                 return 0;
3335                         } else if (rc == -ESHUTDOWN) {
3336                                 cFYI(1,("Waking up socket by sending it signal"));
3337                                 if(cifsd_task) {
3338                                         send_sig(SIGKILL,cifsd_task,1);
3339                                         kthread_stop(cifsd_task);
3340                                 }
3341                                 rc = 0;
3342                         } /* else - we have an smb session
3343                                 left on this socket do not kill cifsd */
3344                 } else
3345                         cFYI(1, ("No session or bad tcon"));
3346         }
3347
3348         cifs_sb->tcon = NULL;
3349         tmp = cifs_sb->prepath;
3350         cifs_sb->prepathlen = 0;
3351         cifs_sb->prepath = NULL;
3352         kfree(tmp);
3353         if (ses)
3354                 schedule_timeout_interruptible(msecs_to_jiffies(500));
3355         if (ses)
3356                 sesInfoFree(ses);
3357
3358         FreeXid(xid);
3359         return rc;              /* BB check if we should always return zero here */
3360 }
3361
3362 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3363                                            struct nls_table * nls_info)
3364 {
3365         int rc = 0;
3366         char ntlm_session_key[CIFS_SESS_KEY_SIZE];
3367         int ntlmv2_flag = FALSE;
3368         int first_time = 0;
3369
3370         /* what if server changes its buffer size after dropping the session? */
3371         if(pSesInfo->server->maxBuf == 0) /* no need to send on reconnect */ {
3372                 rc = CIFSSMBNegotiate(xid, pSesInfo);
3373                 if(rc == -EAGAIN) /* retry only once on 1st time connection */ {
3374                         rc = CIFSSMBNegotiate(xid, pSesInfo);
3375                         if(rc == -EAGAIN)
3376                                 rc = -EHOSTDOWN;
3377                 }
3378                 if(rc == 0) {
3379                         spin_lock(&GlobalMid_Lock);
3380                         if(pSesInfo->server->tcpStatus != CifsExiting)
3381                                 pSesInfo->server->tcpStatus = CifsGood;
3382                         else
3383                                 rc = -EHOSTDOWN;
3384                         spin_unlock(&GlobalMid_Lock);
3385
3386                 }
3387                 first_time = 1;
3388         }
3389         if (!rc) {
3390                 pSesInfo->flags = 0;
3391                 pSesInfo->capabilities = pSesInfo->server->capabilities;
3392                 if(linuxExtEnabled == 0)
3393                         pSesInfo->capabilities &= (~CAP_UNIX);
3394         /*      pSesInfo->sequence_number = 0;*/
3395                 cFYI(1,("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3396                         pSesInfo->server->secMode,
3397                         pSesInfo->server->capabilities,
3398                         pSesInfo->server->timeAdj));
3399                 if(experimEnabled < 2)
3400                         rc = CIFS_SessSetup(xid, pSesInfo,
3401                                             first_time, nls_info);
3402                 else if (extended_security
3403                                 && (pSesInfo->capabilities
3404                                         & CAP_EXTENDED_SECURITY)
3405                                 && (pSesInfo->server->secType == NTLMSSP)) {
3406                         rc = -EOPNOTSUPP;
3407                 } else if (extended_security
3408                            && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3409                            && (pSesInfo->server->secType == RawNTLMSSP)) {
3410                         cFYI(1, ("NTLMSSP sesssetup"));
3411                         rc = CIFSNTLMSSPNegotiateSessSetup(xid,
3412                                                 pSesInfo,
3413                                                 &ntlmv2_flag,
3414                                                 nls_info);
3415                         if (!rc) {
3416                                 if(ntlmv2_flag) {
3417                                         char * v2_response;
3418                                         cFYI(1,("more secure NTLM ver2 hash"));
3419                                         if(CalcNTLMv2_partial_mac_key(pSesInfo,
3420                                                 nls_info)) {
3421                                                 rc = -ENOMEM;
3422                                                 goto ss_err_exit;
3423                                         } else
3424                                                 v2_response = kmalloc(16 + 64 /* blob */, GFP_KERNEL);
3425                                         if(v2_response) {
3426                                                 CalcNTLMv2_response(pSesInfo,v2_response);
3427                                 /*              if(first_time)
3428                                                         cifs_calculate_ntlmv2_mac_key(
3429                                                           pSesInfo->server->mac_signing_key,
3430                                                           response, ntlm_session_key, */
3431                                                 kfree(v2_response);
3432                                         /* BB Put dummy sig in SessSetup PDU? */
3433                                         } else {
3434                                                 rc = -ENOMEM;
3435                                                 goto ss_err_exit;
3436                                         }
3437
3438                                 } else {
3439                                         SMBNTencrypt(pSesInfo->password,
3440                                                 pSesInfo->server->cryptKey,
3441                                                 ntlm_session_key);
3442
3443                                         if(first_time)
3444                                                 cifs_calculate_mac_key(
3445                                                         pSesInfo->server->mac_signing_key,
3446                                                         ntlm_session_key,
3447                                                         pSesInfo->password);
3448                                 }
3449                         /* for better security the weaker lanman hash not sent
3450                            in AuthSessSetup so we no longer calculate it */
3451
3452                                 rc = CIFSNTLMSSPAuthSessSetup(xid,
3453                                         pSesInfo,
3454                                         ntlm_session_key,
3455                                         ntlmv2_flag,
3456                                         nls_info);
3457                         }
3458                 } else { /* old style NTLM 0.12 session setup */
3459                         SMBNTencrypt(pSesInfo->password,
3460                                 pSesInfo->server->cryptKey,
3461                                 ntlm_session_key);
3462
3463                         if(first_time)
3464                                 cifs_calculate_mac_key(
3465                                         pSesInfo->server->mac_signing_key,
3466                                         ntlm_session_key, pSesInfo->password);
3467
3468                         rc = CIFSSessSetup(xid, pSesInfo,
3469                                 ntlm_session_key, nls_info);
3470                 }
3471                 if (rc) {
3472                         cERROR(1,("Send error in SessSetup = %d",rc));
3473                 } else {
3474                         cFYI(1,("CIFS Session Established successfully"));
3475                         pSesInfo->status = CifsGood;
3476                 }
3477         }
3478 ss_err_exit:
3479         return rc;
3480 }
3481