fs/cifs/connect.c

   1 /*
   2  *   fs/cifs/connect.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2006
   5  *   Author(s): Steve French (sfrench@us.ibm.com)
   6  *
   7  *   This library is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU Lesser General Public License as published
   9  *   by the Free Software Foundation; either version 2.1 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This library is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  15  *   the GNU Lesser General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU Lesser General Public License
  18  *   along with this library; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21 #include <linux/fs.h>
  22 #include <linux/net.h>
  23 #include <linux/string.h>
  24 #include <linux/list.h>
  25 #include <linux/wait.h>
  26 #include <linux/ipv6.h>
  27 #include <linux/pagemap.h>
  28 #include <linux/ctype.h>
  29 #include <linux/utsname.h>
  30 #include <linux/mempool.h>
  31 #include <linux/delay.h>
  32 #include <linux/completion.h>
  33 #include <linux/pagevec.h>
  34 #include <asm/uaccess.h>
  35 #include <asm/processor.h>
  36 #include "cifspdu.h"
  37 #include "cifsglob.h"
  38 #include "cifsproto.h"
  39 #include "cifs_unicode.h"
  40 #include "cifs_debug.h"
  41 #include "cifs_fs_sb.h"
  42 #include "ntlmssp.h"
  43 #include "nterr.h"
  44 #include "rfc1002pdu.h"
  45 #include "cn_cifs.h"
  46
  47 #define CIFS_PORT 445
  48 #define RFC1001_PORT 139
  49
  50 static DECLARE_COMPLETION(cifsd_complete);
  51
  52 extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
  53                          unsigned char *p24);
  54
  55 extern mempool_t *cifs_req_poolp;
  56
  57 struct smb_vol {
  58         char *username;
  59         char *password;
  60         char *domainname;
  61         char *UNC;
  62         char *UNCip;
  63         char *in6_addr;  /* ipv6 address as human readable form of in6_addr */
  64         char *iocharset;  /* local code page for mapping to and from Unicode */
  65         char source_rfc1001_name[16]; /* netbios name of client */
  66         char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
  67         uid_t linux_uid;
  68         gid_t linux_gid;
  69         mode_t file_mode;
  70         mode_t dir_mode;
  71         unsigned secFlg;
  72         unsigned rw:1;
  73         unsigned retry:1;
  74         unsigned intr:1;
  75         unsigned setuids:1;
  76         unsigned noperm:1;
  77         unsigned no_psx_acl:1; /* set if posix acl support should be disabled */
  78         unsigned cifs_acl:1;
  79         unsigned no_xattr:1;   /* set if xattr (EA) support should be disabled*/
  80         unsigned server_ino:1; /* use inode numbers from server ie UniqueId */
  81         unsigned direct_io:1;
  82         unsigned remap:1;   /* set to remap seven reserved chars in filenames */
  83         unsigned posix_paths:1;   /* unset to not ask for posix pathnames. */
  84         unsigned sfu_emul:1;
  85         unsigned nullauth:1; /* attempt to authenticate with null user */
  86         unsigned nocase;     /* request case insensitive filenames */
  87         unsigned nobrl;      /* disable sending byte range locks to srv */
  88         unsigned int rsize;
  89         unsigned int wsize;
  90         unsigned int sockopt;
  91         unsigned short int port;
  92 };
  93
  94 static int ipv4_connect(struct sockaddr_in *psin_server,
  95                         struct socket **csocket,
  96                         char * netb_name,
  97                         char * server_netb_name);
  98 static int ipv6_connect(struct sockaddr_in6 *psin_server,
  99                         struct socket **csocket);
 100
 101
 102         /*
 103          * cifs tcp session reconnection
 104          *
 105          * mark tcp session as reconnecting so temporarily locked
 106          * mark all smb sessions as reconnecting for tcp session
 107          * reconnect tcp session
 108          * wake up waiters on reconnection? - (not needed currently)
 109          */
 110
 111 int
 112 cifs_reconnect(struct TCP_Server_Info *server)
 113 {
 114         int rc = 0;
 115         struct list_head *tmp;
 116         struct cifsSesInfo *ses;
 117         struct cifsTconInfo *tcon;
 118         struct mid_q_entry * mid_entry;
 119
 120         spin_lock(&GlobalMid_Lock);
 121         if(server->tcpStatus == CifsExiting) {
 122                 /* the demux thread will exit normally
 123                 next time through the loop */
 124                 spin_unlock(&GlobalMid_Lock);
 125                 return rc;
 126         } else
 127                 server->tcpStatus = CifsNeedReconnect;
 128         spin_unlock(&GlobalMid_Lock);
 129         server->maxBuf = 0;
 130
 131         cFYI(1, ("Reconnecting tcp session"));
 132
 133         /* before reconnecting the tcp session, mark the smb session (uid)
 134                 and the tid bad so they are not used until reconnected */
 135         read_lock(&GlobalSMBSeslock);
 136         list_for_each(tmp, &GlobalSMBSessionList) {
 137                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
 138                 if (ses->server) {
 139                         if (ses->server == server) {
 140                                 ses->status = CifsNeedReconnect;
 141                                 ses->ipc_tid = 0;
 142                         }
 143                 }
 144                 /* else tcp and smb sessions need reconnection */
 145         }
 146         list_for_each(tmp, &GlobalTreeConnectionList) {
 147                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
 148                 if((tcon) && (tcon->ses) && (tcon->ses->server == server)) {
 149                         tcon->tidStatus = CifsNeedReconnect;
 150                 }
 151         }
 152         read_unlock(&GlobalSMBSeslock);
 153         /* do not want to be sending data on a socket we are freeing */
 154         down(&server->tcpSem);
 155         if(server->ssocket) {
 156                 cFYI(1,("State: 0x%x Flags: 0x%lx", server->ssocket->state,
 157                         server->ssocket->flags));
 158                 server->ssocket->ops->shutdown(server->ssocket,SEND_SHUTDOWN);
 159                 cFYI(1,("Post shutdown state: 0x%x Flags: 0x%lx", server->ssocket->state,
 160                         server->ssocket->flags));
 161                 sock_release(server->ssocket);
 162                 server->ssocket = NULL;
 163         }
 164
 165         spin_lock(&GlobalMid_Lock);
 166         list_for_each(tmp, &server->pending_mid_q) {
 167                 mid_entry = list_entry(tmp, struct
 168                                         mid_q_entry,
 169                                         qhead);
 170                 if(mid_entry) {
 171                         if(mid_entry->midState == MID_REQUEST_SUBMITTED) {
 172                                 /* Mark other intransit requests as needing
 173                                    retry so we do not immediately mark the
 174                                    session bad again (ie after we reconnect
 175                                    below) as they timeout too */
 176                                 mid_entry->midState = MID_RETRY_NEEDED;
 177                         }
 178                 }
 179         }
 180         spin_unlock(&GlobalMid_Lock);
 181         up(&server->tcpSem);
 182
 183         while ((server->tcpStatus != CifsExiting) && (server->tcpStatus != CifsGood))
 184         {
 185                 if(server->protocolType == IPV6) {
 186                         rc = ipv6_connect(&server->addr.sockAddr6,&server->ssocket);
 187                 } else {
 188                         rc = ipv4_connect(&server->addr.sockAddr,
 189                                         &server->ssocket,
 190                                         server->workstation_RFC1001_name,
 191                                         server->server_RFC1001_name);
 192                 }
 193                 if(rc) {
 194                         cFYI(1,("reconnect error %d",rc));
 195                         msleep(3000);
 196                 } else {
 197                         atomic_inc(&tcpSesReconnectCount);
 198                         spin_lock(&GlobalMid_Lock);
 199                         if(server->tcpStatus != CifsExiting)
 200                                 server->tcpStatus = CifsGood;
 201                         server->sequence_number = 0;
 202                         spin_unlock(&GlobalMid_Lock);
 203         /*              atomic_set(&server->inFlight,0);*/
 204                         wake_up(&server->response_q);
 205                 }
 206         }
 207         return rc;
 208 }
 209
 210 /*
 211         return codes:
 212                 0       not a transact2, or all data present
 213                 >0      transact2 with that much data missing
 214                 -EINVAL = invalid transact2
 215
 216  */
 217 static int check2ndT2(struct smb_hdr * pSMB, unsigned int maxBufSize)
 218 {
 219         struct smb_t2_rsp * pSMBt;
 220         int total_data_size;
 221         int data_in_this_rsp;
 222         int remaining;
 223
 224         if(pSMB->Command != SMB_COM_TRANSACTION2)
 225                 return 0;
 226
 227         /* check for plausible wct, bcc and t2 data and parm sizes */
 228         /* check for parm and data offset going beyond end of smb */
 229         if(pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
 230                 cFYI(1,("invalid transact2 word count"));
 231                 return -EINVAL;
 232         }
 233
 234         pSMBt = (struct smb_t2_rsp *)pSMB;
 235
 236         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 237         data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 238
 239         remaining = total_data_size - data_in_this_rsp;
 240
 241         if(remaining == 0)
 242                 return 0;
 243         else if(remaining < 0) {
 244                 cFYI(1,("total data %d smaller than data in frame %d",
 245                         total_data_size, data_in_this_rsp));
 246                 return -EINVAL;
 247         } else {
 248                 cFYI(1,("missing %d bytes from transact2, check next response",
 249                         remaining));
 250                 if(total_data_size > maxBufSize) {
 251                         cERROR(1,("TotalDataSize %d is over maximum buffer %d",
 252                                 total_data_size,maxBufSize));
 253                         return -EINVAL;
 254                 }
 255                 return remaining;
 256         }
 257 }
 258
 259 static int coalesce_t2(struct smb_hdr * psecond, struct smb_hdr *pTargetSMB)
 260 {
 261         struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
 262         struct smb_t2_rsp *pSMBt  = (struct smb_t2_rsp *)pTargetSMB;
 263         int total_data_size;
 264         int total_in_buf;
 265         int remaining;
 266         int total_in_buf2;
 267         char * data_area_of_target;
 268         char * data_area_of_buf2;
 269         __u16 byte_count;
 270
 271         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 272
 273         if(total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
 274                 cFYI(1,("total data sizes of primary and secondary t2 differ"));
 275         }
 276
 277         total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 278
 279         remaining = total_data_size - total_in_buf;
 280
 281         if(remaining < 0)
 282                 return -EINVAL;
 283
 284         if(remaining == 0) /* nothing to do, ignore */
 285                 return 0;
 286
 287         total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
 288         if(remaining < total_in_buf2) {
 289                 cFYI(1,("transact2 2nd response contains too much data"));
 290         }
 291
 292         /* find end of first SMB data area */
 293         data_area_of_target = (char *)&pSMBt->hdr.Protocol +
 294                                 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
 295         /* validate target area */
 296
 297         data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
 298                                         le16_to_cpu(pSMB2->t2_rsp.DataOffset);
 299
 300         data_area_of_target += total_in_buf;
 301
 302         /* copy second buffer into end of first buffer */
 303         memcpy(data_area_of_target,data_area_of_buf2,total_in_buf2);
 304         total_in_buf += total_in_buf2;
 305         pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
 306         byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
 307         byte_count += total_in_buf2;
 308         BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
 309
 310         byte_count = pTargetSMB->smb_buf_length;
 311         byte_count += total_in_buf2;
 312
 313         /* BB also add check that we are not beyond maximum buffer size */
 314
 315         pTargetSMB->smb_buf_length = byte_count;
 316
 317         if(remaining == total_in_buf2) {
 318                 cFYI(1,("found the last secondary response"));
 319                 return 0; /* we are done */
 320         } else /* more responses to go */
 321                 return 1;
 322
 323 }
 324
 325 static int
 326 cifs_demultiplex_thread(struct TCP_Server_Info *server)
 327 {
 328         int length;
 329         unsigned int pdu_length, total_read;
 330         struct smb_hdr *smb_buffer = NULL;
 331         struct smb_hdr *bigbuf = NULL;
 332         struct smb_hdr *smallbuf = NULL;
 333         struct msghdr smb_msg;
 334         struct kvec iov;
 335         struct socket *csocket = server->ssocket;
 336         struct list_head *tmp;
 337         struct cifsSesInfo *ses;
 338         struct task_struct *task_to_wake = NULL;
 339         struct mid_q_entry *mid_entry;
 340         char temp;
 341         int isLargeBuf = FALSE;
 342         int isMultiRsp;
 343         int reconnect;
 344
 345         daemonize("cifsd");
 346         allow_signal(SIGKILL);
 347         current->flags |= PF_MEMALLOC;
 348         server->tsk = current;  /* save process info to wake at shutdown */
 349         cFYI(1, ("Demultiplex PID: %d", current->pid));
 350         write_lock(&GlobalSMBSeslock);
 351         atomic_inc(&tcpSesAllocCount);
 352         length = tcpSesAllocCount.counter;
 353         write_unlock(&GlobalSMBSeslock);
 354         complete(&cifsd_complete);
 355         if(length  > 1) {
 356                 mempool_resize(cifs_req_poolp,
 357                         length + cifs_min_rcv,
 358                         GFP_KERNEL);
 359         }
 360
 361         while (server->tcpStatus != CifsExiting) {
 362                 if (try_to_freeze())
 363                         continue;
 364                 if (bigbuf == NULL) {
 365                         bigbuf = cifs_buf_get();
 366                         if (!bigbuf) {
 367                                 cERROR(1, ("No memory for large SMB response"));
 368                                 msleep(3000);
 369                                 /* retry will check if exiting */
 370                                 continue;
 371                         }
 372                 } else if (isLargeBuf) {
 373                         /* we are reusing a dirty large buf, clear its start */
 374                         memset(bigbuf, 0, sizeof (struct smb_hdr));
 375                 }
 376
 377                 if (smallbuf == NULL) {
 378                         smallbuf = cifs_small_buf_get();
 379                         if (!smallbuf) {
 380                                 cERROR(1, ("No memory for SMB response"));
 381                                 msleep(1000);
 382                                 /* retry will check if exiting */
 383                                 continue;
 384                         }
 385                         /* beginning of smb buffer is cleared in our buf_get */
 386                 } else /* if existing small buf clear beginning */
 387                         memset(smallbuf, 0, sizeof (struct smb_hdr));
 388
 389                 isLargeBuf = FALSE;
 390                 isMultiRsp = FALSE;
 391                 smb_buffer = smallbuf;
 392                 iov.iov_base = smb_buffer;
 393                 iov.iov_len = 4;
 394                 smb_msg.msg_control = NULL;
 395                 smb_msg.msg_controllen = 0;
 396                 length =
 397                     kernel_recvmsg(csocket, &smb_msg,
 398                                  &iov, 1, 4, 0 /* BB see socket.h flags */);
 399
 400                 if (server->tcpStatus == CifsExiting) {
 401                         break;
 402                 } else if (server->tcpStatus == CifsNeedReconnect) {
 403                         cFYI(1, ("Reconnect after server stopped responding"));
 404                         cifs_reconnect(server);
 405                         cFYI(1, ("call to reconnect done"));
 406                         csocket = server->ssocket;
 407                         continue;
 408                 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
 409                         msleep(1); /* minimum sleep to prevent looping
 410                                 allowing socket to clear and app threads to set
 411                                 tcpStatus CifsNeedReconnect if server hung */
 412                         continue;
 413                 } else if (length <= 0) {
 414                         if (server->tcpStatus == CifsNew) {
 415                                 cFYI(1, ("tcp session abend after SMBnegprot"));
 416                                 /* some servers kill the TCP session rather than
 417                                    returning an SMB negprot error, in which
 418                                    case reconnecting here is not going to help,
 419                                    and so simply return error to mount */
 420                                 break;
 421                         }
 422                         if (!try_to_freeze() && (length == -EINTR)) {
 423                                 cFYI(1,("cifsd thread killed"));
 424                                 break;
 425                         }
 426                         cFYI(1,("Reconnect after unexpected peek error %d",
 427                                 length));
 428                         cifs_reconnect(server);
 429                         csocket = server->ssocket;
 430                         wake_up(&server->response_q);
 431                         continue;
 432                 } else if (length < 4) {
 433                         cFYI(1,
 434                             ("Frame under four bytes received (%d bytes long)",
 435                               length));
 436                         cifs_reconnect(server);
 437                         csocket = server->ssocket;
 438                         wake_up(&server->response_q);
 439                         continue;
 440                 }
 441
 442                 /* The right amount was read from socket - 4 bytes */
 443                 /* so we can now interpret the length field */
 444
 445                 /* the first byte big endian of the length field,
 446                 is actually not part of the length but the type
 447                 with the most common, zero, as regular data */
 448                 temp = *((char *) smb_buffer);
 449
 450                 /* Note that FC 1001 length is big endian on the wire,
 451                 but we convert it here so it is always manipulated
 452                 as host byte order */
 453                 pdu_length = ntohl(smb_buffer->smb_buf_length);
 454                 smb_buffer->smb_buf_length = pdu_length;
 455
 456                 cFYI(1,("rfc1002 length 0x%x)", pdu_length+4));
 457
 458                 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
 459                         continue;
 460                 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
 461                         cFYI(1,("Good RFC 1002 session rsp"));
 462                         continue;
 463                 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
 464                         /* we get this from Windows 98 instead of
 465                            an error on SMB negprot response */
 466                         cFYI(1,("Negative RFC1002 Session Response Error 0x%x)",
 467                                 pdu_length));
 468                         if(server->tcpStatus == CifsNew) {
 469                                 /* if nack on negprot (rather than
 470                                 ret of smb negprot error) reconnecting
 471                                 not going to help, ret error to mount */
 472                                 break;
 473                         } else {
 474                                 /* give server a second to
 475                                 clean up before reconnect attempt */
 476                                 msleep(1000);
 477                                 /* always try 445 first on reconnect
 478                                 since we get NACK on some if we ever
 479                                 connected to port 139 (the NACK is
 480                                 since we do not begin with RFC1001
 481                                 session initialize frame) */
 482                                 server->addr.sockAddr.sin_port =
 483                                         htons(CIFS_PORT);
 484                                 cifs_reconnect(server);
 485                                 csocket = server->ssocket;
 486                                 wake_up(&server->response_q);
 487                                 continue;
 488                         }
 489                 } else if (temp != (char) 0) {
 490                         cERROR(1,("Unknown RFC 1002 frame"));
 491                         cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
 492                                       length);
 493                         cifs_reconnect(server);
 494                         csocket = server->ssocket;
 495                         continue;
 496                 }
 497
 498                 /* else we have an SMB response */
 499                 if((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
 500                             (pdu_length < sizeof (struct smb_hdr) - 1 - 4)) {
 501                         cERROR(1, ("Invalid size SMB length %d pdu_length %d",
 502                                         length, pdu_length+4));
 503                         cifs_reconnect(server);
 504                         csocket = server->ssocket;
 505                         wake_up(&server->response_q);
 506                         continue;
 507                 }
 508
 509                 /* else length ok */
 510                 reconnect = 0;
 511
 512                 if(pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
 513                         isLargeBuf = TRUE;
 514                         memcpy(bigbuf, smallbuf, 4);
 515                         smb_buffer = bigbuf;
 516                 }
 517                 length = 0;
 518                 iov.iov_base = 4 + (char *)smb_buffer;
 519                 iov.iov_len = pdu_length;
 520                 for (total_read = 0; total_read < pdu_length;
 521                      total_read += length) {
 522                         length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
 523                                                 pdu_length - total_read, 0);
 524                         if((server->tcpStatus == CifsExiting) ||
 525                             (length == -EINTR)) {
 526                                 /* then will exit */
 527                                 reconnect = 2;
 528                                 break;
 529                         } else if (server->tcpStatus == CifsNeedReconnect) {
 530                                 cifs_reconnect(server);
 531                                 csocket = server->ssocket;
 532                                 /* Reconnect wakes up rspns q */
 533                                 /* Now we will reread sock */
 534                                 reconnect = 1;
 535                                 break;
 536                         } else if ((length == -ERESTARTSYS) ||
 537                                    (length == -EAGAIN)) {
 538                                 msleep(1); /* minimum sleep to prevent looping,
 539                                               allowing socket to clear and app
 540                                               threads to set tcpStatus
 541                                               CifsNeedReconnect if server hung*/
 542                                 continue;
 543                         } else if (length <= 0) {
 544                                 cERROR(1,("Received no data, expecting %d",
 545                                               pdu_length - total_read));
 546                                 cifs_reconnect(server);
 547                                 csocket = server->ssocket;
 548                                 reconnect = 1;
 549                                 break;
 550                         }
 551                 }
 552                 if(reconnect == 2)
 553                         break;
 554                 else if(reconnect == 1)
 555                         continue;
 556
 557                 length += 4; /* account for rfc1002 hdr */
 558
 559
 560                 dump_smb(smb_buffer, length);
 561                 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
 562                         cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
 563                         continue;
 564                 }
 565
 566
 567                 task_to_wake = NULL;
 568                 spin_lock(&GlobalMid_Lock);
 569                 list_for_each(tmp, &server->pending_mid_q) {
 570                         mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 571
 572                         if ((mid_entry->mid == smb_buffer->Mid) &&
 573                             (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
 574                             (mid_entry->command == smb_buffer->Command)) {
 575                                 if(check2ndT2(smb_buffer,server->maxBuf) > 0) {
 576                                         /* We have a multipart transact2 resp */
 577                                         isMultiRsp = TRUE;
 578                                         if(mid_entry->resp_buf) {
 579                                                 /* merge response - fix up 1st*/
 580                                                 if(coalesce_t2(smb_buffer,
 581                                                         mid_entry->resp_buf)) {
 582                                                         mid_entry->multiRsp = 1;
 583                                                         break;
 584                                                 } else {
 585                                                         /* all parts received */
 586                                                         mid_entry->multiEnd = 1;
 587                                                         goto multi_t2_fnd;
 588                                                 }
 589                                         } else {
 590                                                 if(!isLargeBuf) {
 591                                                         cERROR(1,("1st trans2 resp needs bigbuf"));
 592                                         /* BB maybe we can fix this up,  switch
 593                                            to already allocated large buffer? */
 594                                                 } else {
 595                                                         /* Have first buffer */
 596                                                         mid_entry->resp_buf =
 597                                                                  smb_buffer;
 598                                                         mid_entry->largeBuf = 1;
 599                                                         bigbuf = NULL;
 600                                                 }
 601                                         }
 602                                         break;
 603                                 }
 604                                 mid_entry->resp_buf = smb_buffer;
 605                                 if(isLargeBuf)
 606                                         mid_entry->largeBuf = 1;
 607                                 else
 608                                         mid_entry->largeBuf = 0;
 609 multi_t2_fnd:
 610                                 task_to_wake = mid_entry->tsk;
 611                                 mid_entry->midState = MID_RESPONSE_RECEIVED;
 612 #ifdef CONFIG_CIFS_STATS2
 613                                 mid_entry->when_received = jiffies;
 614 #endif
 615                                 break;
 616                         }
 617                 }
 618                 spin_unlock(&GlobalMid_Lock);
 619                 if (task_to_wake) {
 620                         /* Was previous buf put in mpx struct for multi-rsp? */
 621                         if(!isMultiRsp) {
 622                                 /* smb buffer will be freed by user thread */
 623                                 if(isLargeBuf) {
 624                                         bigbuf = NULL;
 625                                 } else
 626                                         smallbuf = NULL;
 627                         }
 628                         wake_up_process(task_to_wake);
 629                 } else if ((is_valid_oplock_break(smb_buffer, server) == FALSE)
 630                     && (isMultiRsp == FALSE)) {
 631                         cERROR(1, ("No task to wake, unknown frame rcvd! NumMids %d", midCount.counter));
 632                         cifs_dump_mem("Received Data is: ",(char *)smb_buffer,
 633                                       sizeof(struct smb_hdr));
 634 #ifdef CONFIG_CIFS_DEBUG2
 635                         cifs_dump_detail(smb_buffer);
 636                         cifs_dump_mids(server);
 637 #endif /* CIFS_DEBUG2 */
 638
 639                 }
 640         } /* end while !EXITING */
 641
 642         spin_lock(&GlobalMid_Lock);
 643         server->tcpStatus = CifsExiting;
 644         server->tsk = NULL;
 645         /* check if we have blocked requests that need to free */
 646         /* Note that cifs_max_pending is normally 50, but
 647         can be set at module install time to as little as two */
 648         if(atomic_read(&server->inFlight) >= cifs_max_pending)
 649                 atomic_set(&server->inFlight, cifs_max_pending - 1);
 650         /* We do not want to set the max_pending too low or we
 651         could end up with the counter going negative */
 652         spin_unlock(&GlobalMid_Lock);
 653         /* Although there should not be any requests blocked on
 654         this queue it can not hurt to be paranoid and try to wake up requests
 655         that may haven been blocked when more than 50 at time were on the wire
 656         to the same server - they now will see the session is in exit state
 657         and get out of SendReceive.  */
 658         wake_up_all(&server->request_q);
 659         /* give those requests time to exit */
 660         msleep(125);
 661
 662         if(server->ssocket) {
 663                 sock_release(csocket);
 664                 server->ssocket = NULL;
 665         }
 666         /* buffer usuallly freed in free_mid - need to free it here on exit */
 667         if (bigbuf != NULL)
 668                 cifs_buf_release(bigbuf);
 669         if (smallbuf != NULL)
 670                 cifs_small_buf_release(smallbuf);
 671
 672         read_lock(&GlobalSMBSeslock);
 673         if (list_empty(&server->pending_mid_q)) {
 674                 /* loop through server session structures attached to this and
 675                     mark them dead */
 676                 list_for_each(tmp, &GlobalSMBSessionList) {
 677                         ses =
 678                             list_entry(tmp, struct cifsSesInfo,
 679                                        cifsSessionList);
 680                         if (ses->server == server) {
 681                                 ses->status = CifsExiting;
 682                                 ses->server = NULL;
 683                         }
 684                 }
 685                 read_unlock(&GlobalSMBSeslock);
 686         } else {
 687                 /* although we can not zero the server struct pointer yet,
 688                 since there are active requests which may depnd on them,
 689                 mark the corresponding SMB sessions as exiting too */
 690                 list_for_each(tmp, &GlobalSMBSessionList) {
 691                         ses = list_entry(tmp, struct cifsSesInfo,
 692                                          cifsSessionList);
 693                         if (ses->server == server) {
 694                                 ses->status = CifsExiting;
 695                         }
 696                 }
 697
 698                 spin_lock(&GlobalMid_Lock);
 699                 list_for_each(tmp, &server->pending_mid_q) {
 700                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 701                         if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
 702                                 cFYI(1,
 703                                   ("Clearing Mid 0x%x - waking up ",mid_entry->mid));
 704                                 task_to_wake = mid_entry->tsk;
 705                                 if(task_to_wake) {
 706                                         wake_up_process(task_to_wake);
 707                                 }
 708                         }
 709                 }
 710                 spin_unlock(&GlobalMid_Lock);
 711                 read_unlock(&GlobalSMBSeslock);
 712                 /* 1/8th of sec is more than enough time for them to exit */
 713                 msleep(125);
 714         }
 715
 716         if (!list_empty(&server->pending_mid_q)) {
 717                 /* mpx threads have not exited yet give them
 718                 at least the smb send timeout time for long ops */
 719                 /* due to delays on oplock break requests, we need
 720                 to wait at least 45 seconds before giving up
 721                 on a request getting a response and going ahead
 722                 and killing cifsd */
 723                 cFYI(1, ("Wait for exit from demultiplex thread"));
 724                 msleep(46000);
 725                 /* if threads still have not exited they are probably never
 726                 coming home not much else we can do but free the memory */
 727         }
 728
 729         write_lock(&GlobalSMBSeslock);
 730         atomic_dec(&tcpSesAllocCount);
 731         length = tcpSesAllocCount.counter;
 732
 733         /* last chance to mark ses pointers invalid
 734         if there are any pointing to this (e.g
 735         if a crazy root user tried to kill cifsd
 736         kernel thread explicitly this might happen) */
 737         list_for_each(tmp, &GlobalSMBSessionList) {
 738                 ses = list_entry(tmp, struct cifsSesInfo,
 739                                 cifsSessionList);
 740                 if (ses->server == server) {
 741                         ses->server = NULL;
 742                 }
 743         }
 744         write_unlock(&GlobalSMBSeslock);
 745
 746         kfree(server);
 747         if(length  > 0) {
 748                 mempool_resize(cifs_req_poolp,
 749                         length + cifs_min_rcv,
 750                         GFP_KERNEL);
 751         }
 752
 753         complete_and_exit(&cifsd_complete, 0);
 754         return 0;
 755 }
 756
 757 static int
 758 cifs_parse_mount_options(char *options, const char *devname,struct smb_vol *vol)
 759 {
 760         char *value;
 761         char *data;
 762         unsigned int  temp_len, i, j;
 763         char separator[2];
 764
 765         separator[0] = ',';
 766         separator[1] = 0;
 767
 768         memset(vol->source_rfc1001_name,0x20,15);
 769         for(i=0;i < strnlen(system_utsname.nodename,15);i++) {
 770                 /* does not have to be a perfect mapping since the field is
 771                 informational, only used for servers that do not support
 772                 port 445 and it can be overridden at mount time */
 773                 vol->source_rfc1001_name[i] =
 774                         toupper(system_utsname.nodename[i]);
 775         }
 776         vol->source_rfc1001_name[15] = 0;
 777         /* null target name indicates to use *SMBSERVR default called name
 778            if we end up sending RFC1001 session initialize */
 779         vol->target_rfc1001_name[0] = 0;
 780         vol->linux_uid = current->uid;  /* current->euid instead? */
 781         vol->linux_gid = current->gid;
 782         vol->dir_mode = S_IRWXUGO;
 783         /* 2767 perms indicate mandatory locking support */
 784         vol->file_mode = S_IALLUGO & ~(S_ISUID | S_IXGRP);
 785
 786         /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
 787         vol->rw = TRUE;
 788         /* default is always to request posix paths. */
 789         vol->posix_paths = 1;
 790
 791         if (!options)
 792                 return 1;
 793
 794         if(strncmp(options,"sep=",4) == 0) {
 795                 if(options[4] != 0) {
 796                         separator[0] = options[4];
 797                         options += 5;
 798                 } else {
 799                         cFYI(1,("Null separator not allowed"));
 800                 }
 801         }
 802
 803         while ((data = strsep(&options, separator)) != NULL) {
 804                 if (!*data)
 805                         continue;
 806                 if ((value = strchr(data, '=')) != NULL)
 807                         *value++ = '\0';
 808
 809                 if (strnicmp(data, "user_xattr",10) == 0) {/*parse before user*/
 810                         vol->no_xattr = 0;
 811                 } else if (strnicmp(data, "nouser_xattr",12) == 0) {
 812                         vol->no_xattr = 1;
 813                 } else if (strnicmp(data, "user", 4) == 0) {
 814                         if (!value || !*value) {
 815                                 printk(KERN_WARNING
 816                                        "CIFS: invalid or missing username\n");
 817                                 return 1;       /* needs_arg; */
 818                         }
 819                         if (strnlen(value, 200) < 200) {
 820                                 vol->username = value;
 821                         } else {
 822                                 printk(KERN_WARNING "CIFS: username too long\n");
 823                                 return 1;
 824                         }
 825                 } else if (strnicmp(data, "pass", 4) == 0) {
 826                         if (!value) {
 827                                 vol->password = NULL;
 828                                 continue;
 829                         } else if(value[0] == 0) {
 830                                 /* check if string begins with double comma
 831                                    since that would mean the password really
 832                                    does start with a comma, and would not
 833                                    indicate an empty string */
 834                                 if(value[1] != separator[0]) {
 835                                         vol->password = NULL;
 836                                         continue;
 837                                 }
 838                         }
 839                         temp_len = strlen(value);
 840                         /* removed password length check, NTLM passwords
 841                                 can be arbitrarily long */
 842
 843                         /* if comma in password, the string will be
 844                         prematurely null terminated.  Commas in password are
 845                         specified across the cifs mount interface by a double
 846                         comma ie ,, and a comma used as in other cases ie ','
 847                         as a parameter delimiter/separator is single and due
 848                         to the strsep above is temporarily zeroed. */
 849
 850                         /* NB: password legally can have multiple commas and
 851                         the only illegal character in a password is null */
 852
 853                         if ((value[temp_len] == 0) &&
 854                             (value[temp_len+1] == separator[0])) {
 855                                 /* reinsert comma */
 856                                 value[temp_len] = separator[0];
 857                                 temp_len+=2;  /* move after the second comma */
 858                                 while(value[temp_len] != 0)  {
 859                                         if (value[temp_len] == separator[0]) {
 860                                                 if (value[temp_len+1] ==
 861                                                      separator[0]) {
 862                                                 /* skip second comma */
 863                                                         temp_len++;
 864                                                 } else {
 865                                                 /* single comma indicating start
 866                                                          of next parm */
 867                                                         break;
 868                                                 }
 869                                         }
 870                                         temp_len++;
 871                                 }
 872                                 if(value[temp_len] == 0) {
 873                                         options = NULL;
 874                                 } else {
 875                                         value[temp_len] = 0;
 876                                         /* point option to start of next parm */
 877                                         options = value + temp_len + 1;
 878                                 }
 879                                 /* go from value to value + temp_len condensing
 880                                 double commas to singles. Note that this ends up
 881                                 allocating a few bytes too many, which is ok */
 882                                 vol->password = kzalloc(temp_len, GFP_KERNEL);
 883                                 if(vol->password == NULL) {
 884                                         printk("CIFS: no memory for pass\n");
 885                                         return 1;
 886                                 }
 887                                 for(i=0,j=0;i<temp_len;i++,j++) {
 888                                         vol->password[j] = value[i];
 889                                         if(value[i] == separator[0]
 890                                                 && value[i+1] == separator[0]) {
 891                                                 /* skip second comma */
 892                                                 i++;
 893                                         }
 894                                 }
 895                                 vol->password[j] = 0;
 896                         } else {
 897                                 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
 898                                 if(vol->password == NULL) {
 899                                         printk("CIFS: no memory for pass\n");
 900                                         return 1;
 901                                 }
 902                                 strcpy(vol->password, value);
 903                         }
 904                 } else if (strnicmp(data, "ip", 2) == 0) {
 905                         if (!value || !*value) {
 906                                 vol->UNCip = NULL;
 907                         } else if (strnlen(value, 35) < 35) {
 908                                 vol->UNCip = value;
 909                         } else {
 910                                 printk(KERN_WARNING "CIFS: ip address too long\n");
 911                                 return 1;
 912                         }
 913                 } else if (strnicmp(data, "sec", 3) == 0) {
 914                         if (!value || !*value) {
 915                                 cERROR(1,("no security value specified"));
 916                                 continue;
 917                         } else if (strnicmp(value, "krb5i", 5) == 0) {
 918                                 vol->secFlg = CIFSSEC_MAY_KRB5 |
 919                                         CIFSSEC_MUST_SIGN;
 920                         } else if (strnicmp(value, "krb5p", 5) == 0) {
 921                                 /* vol->secFlg = CIFSSEC_MUST_SEAL |
 922                                         CIFSSEC_MAY_KRB5; */
 923                                 cERROR(1,("Krb5 cifs privacy not supported"));
 924                                 return 1;
 925                         } else if (strnicmp(value, "krb5", 4) == 0) {
 926                                 vol->secFlg = CIFSSEC_MAY_KRB5;
 927                         } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
 928                                 vol->secFlg = CIFSSEC_MAY_NTLMV2 |
 929                                         CIFSSEC_MUST_SIGN;
 930                         } else if (strnicmp(value, "ntlmv2", 6) == 0) {
 931                                 vol->secFlg = CIFSSEC_MAY_NTLMV2;
 932                         } else if (strnicmp(value, "ntlmi", 5) == 0) {
 933                                 vol->secFlg = CIFSSEC_MAY_NTLM |
 934                                         CIFSSEC_MUST_SIGN;
 935                         } else if (strnicmp(value, "ntlm", 4) == 0) {
 936                                 /* ntlm is default so can be turned off too */
 937                                 vol->secFlg = CIFSSEC_MAY_NTLM;
 938                         } else if (strnicmp(value, "nontlm", 6) == 0) {
 939                                 /* BB is there a better way to do this? */
 940                                 vol->secFlg = CIFSSEC_MAY_NTLMV2;
 941 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 942                         } else if (strnicmp(value, "lanman", 6) == 0) {
 943                                 vol->secFlg = CIFSSEC_MAY_LANMAN;
 944 #endif
 945                         } else if (strnicmp(value, "none", 4) == 0) {
 946                                 vol->nullauth = 1;
 947                         } else {
 948                                 cERROR(1,("bad security option: %s", value));
 949                                 return 1;
 950                         }
 951                 } else if ((strnicmp(data, "unc", 3) == 0)
 952                            || (strnicmp(data, "target", 6) == 0)
 953                            || (strnicmp(data, "path", 4) == 0)) {
 954                         if (!value || !*value) {
 955                                 printk(KERN_WARNING
 956                                        "CIFS: invalid path to network resource\n");
 957                                 return 1;       /* needs_arg; */
 958                         }
 959                         if ((temp_len = strnlen(value, 300)) < 300) {
 960                                 vol->UNC = kmalloc(temp_len+1,GFP_KERNEL);
 961                                 if(vol->UNC == NULL)
 962                                         return 1;
 963                                 strcpy(vol->UNC,value);
 964                                 if (strncmp(vol->UNC, "//", 2) == 0) {
 965                                         vol->UNC[0] = '\\';
 966                                         vol->UNC[1] = '\\';
 967                                 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
 968                                         printk(KERN_WARNING
 969                                                "CIFS: UNC Path does not begin with // or \\\\ \n");
 970                                         return 1;
 971                                 }
 972                         } else {
 973                                 printk(KERN_WARNING "CIFS: UNC name too long\n");
 974                                 return 1;
 975                         }
 976                 } else if ((strnicmp(data, "domain", 3) == 0)
 977                            || (strnicmp(data, "workgroup", 5) == 0)) {
 978                         if (!value || !*value) {
 979                                 printk(KERN_WARNING "CIFS: invalid domain name\n");
 980                                 return 1;       /* needs_arg; */
 981                         }
 982                         /* BB are there cases in which a comma can be valid in
 983                         a domain name and need special handling? */
 984                         if (strnlen(value, 256) < 256) {
 985                                 vol->domainname = value;
 986                                 cFYI(1, ("Domain name set"));
 987                         } else {
 988                                 printk(KERN_WARNING "CIFS: domain name too long\n");
 989                                 return 1;
 990                         }
 991                 } else if (strnicmp(data, "iocharset", 9) == 0) {
 992                         if (!value || !*value) {
 993                                 printk(KERN_WARNING "CIFS: invalid iocharset specified\n");
 994                                 return 1;       /* needs_arg; */
 995                         }
 996                         if (strnlen(value, 65) < 65) {
 997                                 if(strnicmp(value,"default",7))
 998                                         vol->iocharset = value;
 999                                 /* if iocharset not set load_nls_default used by caller */
1000                                 cFYI(1, ("iocharset set to %s",value));
1001                         } else {
1002                                 printk(KERN_WARNING "CIFS: iocharset name too long.\n");
1003                                 return 1;
1004                         }
1005                 } else if (strnicmp(data, "uid", 3) == 0) {
1006                         if (value && *value) {
1007                                 vol->linux_uid =
1008                                         simple_strtoul(value, &value, 0);
1009                         }
1010                 } else if (strnicmp(data, "gid", 3) == 0) {
1011                         if (value && *value) {
1012                                 vol->linux_gid =
1013                                         simple_strtoul(value, &value, 0);
1014                         }
1015                 } else if (strnicmp(data, "file_mode", 4) == 0) {
1016                         if (value && *value) {
1017                                 vol->file_mode =
1018                                         simple_strtoul(value, &value, 0);
1019                         }
1020                 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1021                         if (value && *value) {
1022                                 vol->dir_mode =
1023                                         simple_strtoul(value, &value, 0);
1024                         }
1025                 } else if (strnicmp(data, "dirmode", 4) == 0) {
1026                         if (value && *value) {
1027                                 vol->dir_mode =
1028                                         simple_strtoul(value, &value, 0);
1029                         }
1030                 } else if (strnicmp(data, "port", 4) == 0) {
1031                         if (value && *value) {
1032                                 vol->port =
1033                                         simple_strtoul(value, &value, 0);
1034                         }
1035                 } else if (strnicmp(data, "rsize", 5) == 0) {
1036                         if (value && *value) {
1037                                 vol->rsize =
1038                                         simple_strtoul(value, &value, 0);
1039                         }
1040                 } else if (strnicmp(data, "wsize", 5) == 0) {
1041                         if (value && *value) {
1042                                 vol->wsize =
1043                                         simple_strtoul(value, &value, 0);
1044                         }
1045                 } else if (strnicmp(data, "sockopt", 5) == 0) {
1046                         if (value && *value) {
1047                                 vol->sockopt =
1048                                         simple_strtoul(value, &value, 0);
1049                         }
1050                 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1051                         if (!value || !*value || (*value == ' ')) {
1052                                 cFYI(1,("invalid (empty) netbiosname specified"));
1053                         } else {
1054                                 memset(vol->source_rfc1001_name,0x20,15);
1055                                 for(i=0;i<15;i++) {
1056                                 /* BB are there cases in which a comma can be
1057                                 valid in this workstation netbios name (and need
1058                                 special handling)? */
1059
1060                                 /* We do not uppercase netbiosname for user */
1061                                         if (value[i]==0)
1062                                                 break;
1063                                         else
1064                                                 vol->source_rfc1001_name[i] = value[i];
1065                                 }
1066                                 /* The string has 16th byte zero still from
1067                                 set at top of the function  */
1068                                 if((i==15) && (value[i] != 0))
1069                                         printk(KERN_WARNING "CIFS: netbiosname longer than 15 truncated.\n");
1070                         }
1071                 } else if (strnicmp(data, "servern", 7) == 0) {
1072                         /* servernetbiosname specified override *SMBSERVER */
1073                         if (!value || !*value || (*value == ' ')) {
1074                                 cFYI(1,("empty server netbiosname specified"));
1075                         } else {
1076                                 /* last byte, type, is 0x20 for servr type */
1077                                 memset(vol->target_rfc1001_name,0x20,16);
1078
1079                                 for(i=0;i<15;i++) {
1080                                 /* BB are there cases in which a comma can be
1081                                    valid in this workstation netbios name (and need
1082                                    special handling)? */
1083
1084                                 /* user or mount helper must uppercase netbiosname */
1085                                         if (value[i]==0)
1086                                                 break;
1087                                         else
1088                                                 vol->target_rfc1001_name[i] = value[i];
1089                                 }
1090                                 /* The string has 16th byte zero still from
1091                                    set at top of the function  */
1092                                 if((i==15) && (value[i] != 0))
1093                                         printk(KERN_WARNING "CIFS: server netbiosname longer than 15 truncated.\n");
1094                         }
1095                 } else if (strnicmp(data, "credentials", 4) == 0) {
1096                         /* ignore */
1097                 } else if (strnicmp(data, "version", 3) == 0) {
1098                         /* ignore */
1099                 } else if (strnicmp(data, "guest",5) == 0) {
1100                         /* ignore */
1101                 } else if (strnicmp(data, "rw", 2) == 0) {
1102                         vol->rw = TRUE;
1103                 } else if ((strnicmp(data, "suid", 4) == 0) ||
1104                                    (strnicmp(data, "nosuid", 6) == 0) ||
1105                                    (strnicmp(data, "exec", 4) == 0) ||
1106                                    (strnicmp(data, "noexec", 6) == 0) ||
1107                                    (strnicmp(data, "nodev", 5) == 0) ||
1108                                    (strnicmp(data, "noauto", 6) == 0) ||
1109                                    (strnicmp(data, "dev", 3) == 0)) {
1110                         /*  The mount tool or mount.cifs helper (if present)
1111                                 uses these opts to set flags, and the flags are read
1112                                 by the kernel vfs layer before we get here (ie
1113                                 before read super) so there is no point trying to
1114                                 parse these options again and set anything and it
1115                                 is ok to just ignore them */
1116                         continue;
1117                 } else if (strnicmp(data, "ro", 2) == 0) {
1118                         vol->rw = FALSE;
1119                 } else if (strnicmp(data, "hard", 4) == 0) {
1120                         vol->retry = 1;
1121                 } else if (strnicmp(data, "soft", 4) == 0) {
1122                         vol->retry = 0;
1123                 } else if (strnicmp(data, "perm", 4) == 0) {
1124                         vol->noperm = 0;
1125                 } else if (strnicmp(data, "noperm", 6) == 0) {
1126                         vol->noperm = 1;
1127                 } else if (strnicmp(data, "mapchars", 8) == 0) {
1128                         vol->remap = 1;
1129                 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1130                         vol->remap = 0;
1131                 } else if (strnicmp(data, "sfu", 3) == 0) {
1132                         vol->sfu_emul = 1;
1133                 } else if (strnicmp(data, "nosfu", 5) == 0) {
1134                         vol->sfu_emul = 0;
1135                 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1136                         vol->posix_paths = 1;
1137                 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1138                         vol->posix_paths = 0;
1139                 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1140                            (strnicmp(data, "ignorecase", 10)  == 0)) {
1141                         vol->nocase = 1;
1142                 } else if (strnicmp(data, "brl", 3) == 0) {
1143                         vol->nobrl =  0;
1144                 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1145                            (strnicmp(data, "nolock", 6) == 0)) {
1146                         vol->nobrl =  1;
1147                         /* turn off mandatory locking in mode
1148                         if remote locking is turned off since the
1149                         local vfs will do advisory */
1150                         if(vol->file_mode == (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1151                                 vol->file_mode = S_IALLUGO;
1152                 } else if (strnicmp(data, "setuids", 7) == 0) {
1153                         vol->setuids = 1;
1154                 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1155                         vol->setuids = 0;
1156                 } else if (strnicmp(data, "nohard", 6) == 0) {
1157                         vol->retry = 0;
1158                 } else if (strnicmp(data, "nosoft", 6) == 0) {
1159                         vol->retry = 1;
1160                 } else if (strnicmp(data, "nointr", 6) == 0) {
1161                         vol->intr = 0;
1162                 } else if (strnicmp(data, "intr", 4) == 0) {
1163                         vol->intr = 1;
1164                 } else if (strnicmp(data, "serverino",7) == 0) {
1165                         vol->server_ino = 1;
1166                 } else if (strnicmp(data, "noserverino",9) == 0) {
1167                         vol->server_ino = 0;
1168                 } else if (strnicmp(data, "cifsacl",7) == 0) {
1169                         vol->cifs_acl = 1;
1170                 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1171                         vol->cifs_acl = 0;
1172                 } else if (strnicmp(data, "acl",3) == 0) {
1173                         vol->no_psx_acl = 0;
1174                 } else if (strnicmp(data, "noacl",5) == 0) {
1175                         vol->no_psx_acl = 1;
1176                 } else if (strnicmp(data, "direct",6) == 0) {
1177                         vol->direct_io = 1;
1178                 } else if (strnicmp(data, "forcedirectio",13) == 0) {
1179                         vol->direct_io = 1;
1180                 } else if (strnicmp(data, "in6_addr",8) == 0) {
1181                         if (!value || !*value) {
1182                                 vol->in6_addr = NULL;
1183                         } else if (strnlen(value, 49) == 48) {
1184                                 vol->in6_addr = value;
1185                         } else {
1186                                 printk(KERN_WARNING "CIFS: ip v6 address not 48 characters long\n");
1187                                 return 1;
1188                         }
1189                 } else if (strnicmp(data, "noac", 4) == 0) {
1190                         printk(KERN_WARNING "CIFS: Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n");
1191                 } else
1192                         printk(KERN_WARNING "CIFS: Unknown mount option %s\n",data);
1193         }
1194         if (vol->UNC == NULL) {
1195                 if(devname == NULL) {
1196                         printk(KERN_WARNING "CIFS: Missing UNC name for mount target\n");
1197                         return 1;
1198                 }
1199                 if ((temp_len = strnlen(devname, 300)) < 300) {
1200                         vol->UNC = kmalloc(temp_len+1,GFP_KERNEL);
1201                         if(vol->UNC == NULL)
1202                                 return 1;
1203                         strcpy(vol->UNC,devname);
1204                         if (strncmp(vol->UNC, "//", 2) == 0) {
1205                                 vol->UNC[0] = '\\';
1206                                 vol->UNC[1] = '\\';
1207                         } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1208                                 printk(KERN_WARNING "CIFS: UNC Path does not begin with // or \\\\ \n");
1209                                 return 1;
1210                         }
1211                 } else {
1212                         printk(KERN_WARNING "CIFS: UNC name too long\n");
1213                         return 1;
1214                 }
1215         }
1216         if(vol->UNCip == NULL)
1217                 vol->UNCip = &vol->UNC[2];
1218
1219         return 0;
1220 }
1221
1222 static struct cifsSesInfo *
1223 cifs_find_tcp_session(struct in_addr * target_ip_addr,
1224                 struct in6_addr *target_ip6_addr,
1225                  char *userName, struct TCP_Server_Info **psrvTcp)
1226 {
1227         struct list_head *tmp;
1228         struct cifsSesInfo *ses;
1229         *psrvTcp = NULL;
1230         read_lock(&GlobalSMBSeslock);
1231
1232         list_for_each(tmp, &GlobalSMBSessionList) {
1233                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
1234                 if (ses->server) {
1235                         if((target_ip_addr &&
1236                                 (ses->server->addr.sockAddr.sin_addr.s_addr
1237                                   == target_ip_addr->s_addr)) || (target_ip6_addr
1238                                 && memcmp(&ses->server->addr.sockAddr6.sin6_addr,
1239                                         target_ip6_addr,sizeof(*target_ip6_addr)))){
1240                                 /* BB lock server and tcp session and increment use count here?? */
1241                                 *psrvTcp = ses->server; /* found a match on the TCP session */
1242                                 /* BB check if reconnection needed */
1243                                 if (strncmp
1244                                     (ses->userName, userName,
1245                                      MAX_USERNAME_SIZE) == 0){
1246                                         read_unlock(&GlobalSMBSeslock);
1247                                         return ses;     /* found exact match on both tcp and SMB sessions */
1248                                 }
1249                         }
1250                 }
1251                 /* else tcp and smb sessions need reconnection */
1252         }
1253         read_unlock(&GlobalSMBSeslock);
1254         return NULL;
1255 }
1256
1257 static struct cifsTconInfo *
1258 find_unc(__be32 new_target_ip_addr, char *uncName, char *userName)
1259 {
1260         struct list_head *tmp;
1261         struct cifsTconInfo *tcon;
1262
1263         read_lock(&GlobalSMBSeslock);
1264         list_for_each(tmp, &GlobalTreeConnectionList) {
1265                 cFYI(1, ("Next tcon - "));
1266                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
1267                 if (tcon->ses) {
1268                         if (tcon->ses->server) {
1269                                 cFYI(1,
1270                                      (" old ip addr: %x == new ip %x ?",
1271                                       tcon->ses->server->addr.sockAddr.sin_addr.
1272                                       s_addr, new_target_ip_addr));
1273                                 if (tcon->ses->server->addr.sockAddr.sin_addr.
1274                                     s_addr == new_target_ip_addr) {
1275         /* BB lock tcon and server and tcp session and increment use count here? */
1276                                         /* found a match on the TCP session */
1277                                         /* BB check if reconnection needed */
1278                                         cFYI(1,("Matched ip, old UNC: %s == new: %s ?",
1279                                               tcon->treeName, uncName));
1280                                         if (strncmp
1281                                             (tcon->treeName, uncName,
1282                                              MAX_TREE_SIZE) == 0) {
1283                                                 cFYI(1,
1284                                                      ("Matched UNC, old user: %s == new: %s ?",
1285                                                       tcon->treeName, uncName));
1286                                                 if (strncmp
1287                                                     (tcon->ses->userName,
1288                                                      userName,
1289                                                      MAX_USERNAME_SIZE) == 0) {
1290                                                         read_unlock(&GlobalSMBSeslock);
1291                                                         return tcon;/* also matched user (smb session)*/
1292                                                 }
1293                                         }
1294                                 }
1295                         }
1296                 }
1297         }
1298         read_unlock(&GlobalSMBSeslock);
1299         return NULL;
1300 }
1301
1302 int
1303 connect_to_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1304                     const char *old_path, const struct nls_table *nls_codepage,
1305                     int remap)
1306 {
1307         unsigned char *referrals = NULL;
1308         unsigned int num_referrals;
1309         int rc = 0;
1310
1311         rc = get_dfs_path(xid, pSesInfo,old_path, nls_codepage,
1312                         &num_referrals, &referrals, remap);
1313
1314         /* BB Add in code to: if valid refrl, if not ip address contact
1315                 the helper that resolves tcp names, mount to it, try to
1316                 tcon to it unmount it if fail */
1317
1318         kfree(referrals);
1319
1320         return rc;
1321 }
1322
1323 int
1324 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1325                         const char *old_path, const struct nls_table *nls_codepage,
1326                         unsigned int *pnum_referrals,
1327                         unsigned char ** preferrals, int remap)
1328 {
1329         char *temp_unc;
1330         int rc = 0;
1331
1332         *pnum_referrals = 0;
1333
1334         if (pSesInfo->ipc_tid == 0) {
1335                 temp_unc = kmalloc(2 /* for slashes */ +
1336                         strnlen(pSesInfo->serverName,SERVER_NAME_LEN_WITH_NULL * 2)
1337                                  + 1 + 4 /* slash IPC$ */  + 2,
1338                                 GFP_KERNEL);
1339                 if (temp_unc == NULL)
1340                         return -ENOMEM;
1341                 temp_unc[0] = '\\';
1342                 temp_unc[1] = '\\';
1343                 strcpy(temp_unc + 2, pSesInfo->serverName);
1344                 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1345                 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1346                 cFYI(1,
1347                      ("CIFS Tcon rc = %d ipc_tid = %d", rc,pSesInfo->ipc_tid));
1348                 kfree(temp_unc);
1349         }
1350         if (rc == 0)
1351                 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1352                                      pnum_referrals, nls_codepage, remap);
1353
1354         return rc;
1355 }
1356
1357 /* See RFC1001 section 14 on representation of Netbios names */
1358 static void rfc1002mangle(char * target,char * source, unsigned int length)
1359 {
1360         unsigned int i,j;
1361
1362         for(i=0,j=0;i<(length);i++) {
1363                 /* mask a nibble at a time and encode */
1364                 target[j] = 'A' + (0x0F & (source[i] >> 4));
1365                 target[j+1] = 'A' + (0x0F & source[i]);
1366                 j+=2;
1367         }
1368
1369 }
1370
1371
1372 static int
1373 ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
1374              char * netbios_name, char * target_name)
1375 {
1376         int rc = 0;
1377         int connected = 0;
1378         __be16 orig_port = 0;
1379
1380         if(*csocket == NULL) {
1381                 rc = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, csocket);
1382                 if (rc < 0) {
1383                         cERROR(1, ("Error %d creating socket",rc));
1384                         *csocket = NULL;
1385                         return rc;
1386                 } else {
1387                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1388                         cFYI(1,("Socket created"));
1389                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1390                 }
1391         }
1392
1393         psin_server->sin_family = AF_INET;
1394         if(psin_server->sin_port) { /* user overrode default port */
1395                 rc = (*csocket)->ops->connect(*csocket,
1396                                 (struct sockaddr *) psin_server,
1397                                 sizeof (struct sockaddr_in),0);
1398                 if (rc >= 0)
1399                         connected = 1;
1400         }
1401
1402         if(!connected) {
1403                 /* save original port so we can retry user specified port
1404                         later if fall back ports fail this time  */
1405                 orig_port = psin_server->sin_port;
1406
1407                 /* do not retry on the same port we just failed on */
1408                 if(psin_server->sin_port != htons(CIFS_PORT)) {
1409                         psin_server->sin_port = htons(CIFS_PORT);
1410
1411                         rc = (*csocket)->ops->connect(*csocket,
1412                                         (struct sockaddr *) psin_server,
1413                                         sizeof (struct sockaddr_in),0);
1414                         if (rc >= 0)
1415                                 connected = 1;
1416                 }
1417         }
1418         if (!connected) {
1419                 psin_server->sin_port = htons(RFC1001_PORT);
1420                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1421                                               psin_server, sizeof (struct sockaddr_in),0);
1422                 if (rc >= 0)
1423                         connected = 1;
1424         }
1425
1426         /* give up here - unless we want to retry on different
1427                 protocol families some day */
1428         if (!connected) {
1429                 if(orig_port)
1430                         psin_server->sin_port = orig_port;
1431                 cFYI(1,("Error %d connecting to server via ipv4",rc));
1432                 sock_release(*csocket);
1433                 *csocket = NULL;
1434                 return rc;
1435         }
1436         /* Eventually check for other socket options to change from
1437                 the default. sock_setsockopt not used because it expects
1438                 user space buffer */
1439          cFYI(1,("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",(*csocket)->sk->sk_sndbuf,
1440                  (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
1441         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1442         /* make the bufsizes depend on wsize/rsize and max requests */
1443         if((*csocket)->sk->sk_sndbuf < (200 * 1024))
1444                 (*csocket)->sk->sk_sndbuf = 200 * 1024;
1445         if((*csocket)->sk->sk_rcvbuf < (140 * 1024))
1446                 (*csocket)->sk->sk_rcvbuf = 140 * 1024;
1447
1448         /* send RFC1001 sessinit */
1449         if(psin_server->sin_port == htons(RFC1001_PORT)) {
1450                 /* some servers require RFC1001 sessinit before sending
1451                 negprot - BB check reconnection in case where second
1452                 sessinit is sent but no second negprot */
1453                 struct rfc1002_session_packet * ses_init_buf;
1454                 struct smb_hdr * smb_buf;
1455                 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), GFP_KERNEL);
1456                 if(ses_init_buf) {
1457                         ses_init_buf->trailer.session_req.called_len = 32;
1458                         if(target_name && (target_name[0] != 0)) {
1459                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1460                                         target_name, 16);
1461                         } else {
1462                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1463                                         DEFAULT_CIFS_CALLED_NAME,16);
1464                         }
1465
1466                         ses_init_buf->trailer.session_req.calling_len = 32;
1467                         /* calling name ends in null (byte 16) from old smb
1468                         convention. */
1469                         if(netbios_name && (netbios_name[0] !=0)) {
1470                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1471                                         netbios_name,16);
1472                         } else {
1473                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1474                                         "LINUX_CIFS_CLNT",16);
1475                         }
1476                         ses_init_buf->trailer.session_req.scope1 = 0;
1477                         ses_init_buf->trailer.session_req.scope2 = 0;
1478                         smb_buf = (struct smb_hdr *)ses_init_buf;
1479                         /* sizeof RFC1002_SESSION_REQUEST with no scope */
1480                         smb_buf->smb_buf_length = 0x81000044;
1481                         rc = smb_send(*csocket, smb_buf, 0x44,
1482                                 (struct sockaddr *)psin_server);
1483                         kfree(ses_init_buf);
1484                         msleep(1); /* RFC1001 layer in at least one server
1485                                       requires very short break before negprot
1486                                       presumably because not expecting negprot
1487                                       to follow so fast.  This is a simple
1488                                       solution that works without
1489                                       complicating the code and causes no
1490                                       significant slowing down on mount
1491                                       for everyone else */
1492                 }
1493                 /* else the negprot may still work without this
1494                 even though malloc failed */
1495
1496         }
1497
1498         return rc;
1499 }
1500
1501 static int
1502 ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
1503 {
1504         int rc = 0;
1505         int connected = 0;
1506         __be16 orig_port = 0;
1507
1508         if(*csocket == NULL) {
1509                 rc = sock_create_kern(PF_INET6, SOCK_STREAM, IPPROTO_TCP, csocket);
1510                 if (rc < 0) {
1511                         cERROR(1, ("Error %d creating ipv6 socket",rc));
1512                         *csocket = NULL;
1513                         return rc;
1514                 } else {
1515                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1516                          cFYI(1,("ipv6 Socket created"));
1517                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1518                 }
1519         }
1520
1521         psin_server->sin6_family = AF_INET6;
1522
1523         if(psin_server->sin6_port) { /* user overrode default port */
1524                 rc = (*csocket)->ops->connect(*csocket,
1525                                 (struct sockaddr *) psin_server,
1526                                 sizeof (struct sockaddr_in6),0);
1527                 if (rc >= 0)
1528                         connected = 1;
1529         }
1530
1531         if(!connected) {
1532                 /* save original port so we can retry user specified port
1533                         later if fall back ports fail this time  */
1534
1535                 orig_port = psin_server->sin6_port;
1536                 /* do not retry on the same port we just failed on */
1537                 if(psin_server->sin6_port != htons(CIFS_PORT)) {
1538                         psin_server->sin6_port = htons(CIFS_PORT);
1539
1540                         rc = (*csocket)->ops->connect(*csocket,
1541                                         (struct sockaddr *) psin_server,
1542                                         sizeof (struct sockaddr_in6),0);
1543                         if (rc >= 0)
1544                                 connected = 1;
1545                 }
1546         }
1547         if (!connected) {
1548                 psin_server->sin6_port = htons(RFC1001_PORT);
1549                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1550                                          psin_server, sizeof (struct sockaddr_in6),0);
1551                 if (rc >= 0)
1552                         connected = 1;
1553         }
1554
1555         /* give up here - unless we want to retry on different
1556                 protocol families some day */
1557         if (!connected) {
1558                 if(orig_port)
1559                         psin_server->sin6_port = orig_port;
1560                 cFYI(1,("Error %d connecting to server via ipv6",rc));
1561                 sock_release(*csocket);
1562                 *csocket = NULL;
1563                 return rc;
1564         }
1565         /* Eventually check for other socket options to change from
1566                 the default. sock_setsockopt not used because it expects
1567                 user space buffer */
1568         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1569
1570         return rc;
1571 }
1572
1573 int
1574 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
1575            char *mount_data, const char *devname)
1576 {
1577         int rc = 0;
1578         int xid;
1579         int address_type = AF_INET;
1580         struct socket *csocket = NULL;
1581         struct sockaddr_in sin_server;
1582         struct sockaddr_in6 sin_server6;
1583         struct smb_vol volume_info;
1584         struct cifsSesInfo *pSesInfo = NULL;
1585         struct cifsSesInfo *existingCifsSes = NULL;
1586         struct cifsTconInfo *tcon = NULL;
1587         struct TCP_Server_Info *srvTcp = NULL;
1588
1589         xid = GetXid();
1590
1591 /* cFYI(1, ("Entering cifs_mount. Xid: %d with: %s", xid, mount_data)); */
1592
1593         memset(&volume_info,0,sizeof(struct smb_vol));
1594         if (cifs_parse_mount_options(mount_data, devname, &volume_info)) {
1595                 kfree(volume_info.UNC);
1596                 kfree(volume_info.password);
1597                 FreeXid(xid);
1598                 return -EINVAL;
1599         }
1600
1601         if (volume_info.username) {
1602                 /* BB fixme parse for domain name here */
1603                 cFYI(1, ("Username: %s ", volume_info.username));
1604
1605         } else {
1606                 cifserror("No username specified");
1607         /* In userspace mount helper we can get user name from alternate
1608            locations such as env variables and files on disk */
1609                 kfree(volume_info.UNC);
1610                 kfree(volume_info.password);
1611                 FreeXid(xid);
1612                 return -EINVAL;
1613         }
1614
1615         if (volume_info.UNCip && volume_info.UNC) {
1616                 rc = cifs_inet_pton(AF_INET, volume_info.UNCip,&sin_server.sin_addr.s_addr);
1617
1618                 if(rc <= 0) {
1619                         /* not ipv4 address, try ipv6 */
1620                         rc = cifs_inet_pton(AF_INET6,volume_info.UNCip,&sin_server6.sin6_addr.in6_u);
1621                         if(rc > 0)
1622                                 address_type = AF_INET6;
1623                 } else {
1624                         address_type = AF_INET;
1625                 }
1626
1627                 if(rc <= 0) {
1628                         /* we failed translating address */
1629                         kfree(volume_info.UNC);
1630                         kfree(volume_info.password);
1631                         FreeXid(xid);
1632                         return -EINVAL;
1633                 }
1634
1635                 cFYI(1, ("UNC: %s ip: %s", volume_info.UNC, volume_info.UNCip));
1636                 /* success */
1637                 rc = 0;
1638         } else if (volume_info.UNCip){
1639                 /* BB using ip addr as server name connect to the DFS root below */
1640                 cERROR(1,("Connecting to DFS root not implemented yet"));
1641                 kfree(volume_info.UNC);
1642                 kfree(volume_info.password);
1643                 FreeXid(xid);
1644                 return -EINVAL;
1645         } else /* which servers DFS root would we conect to */ {
1646                 cERROR(1,
1647                        ("CIFS mount error: No UNC path (e.g. -o unc=//192.168.1.100/public) specified"));
1648                 kfree(volume_info.UNC);
1649                 kfree(volume_info.password);
1650                 FreeXid(xid);
1651                 return -EINVAL;
1652         }
1653
1654         /* this is needed for ASCII cp to Unicode converts */
1655         if(volume_info.iocharset == NULL) {
1656                 cifs_sb->local_nls = load_nls_default();
1657         /* load_nls_default can not return null */
1658         } else {
1659                 cifs_sb->local_nls = load_nls(volume_info.iocharset);
1660                 if(cifs_sb->local_nls == NULL) {
1661                         cERROR(1,("CIFS mount error: iocharset %s not found",volume_info.iocharset));
1662                         kfree(volume_info.UNC);
1663                         kfree(volume_info.password);
1664                         FreeXid(xid);
1665                         return -ELIBACC;
1666                 }
1667         }
1668
1669         if(address_type == AF_INET)
1670                 existingCifsSes = cifs_find_tcp_session(&sin_server.sin_addr,
1671                         NULL /* no ipv6 addr */,
1672                         volume_info.username, &srvTcp);
1673         else if(address_type == AF_INET6)
1674                 existingCifsSes = cifs_find_tcp_session(NULL /* no ipv4 addr */,
1675                         &sin_server6.sin6_addr,
1676                         volume_info.username, &srvTcp);
1677         else {
1678                 kfree(volume_info.UNC);
1679                 kfree(volume_info.password);
1680                 FreeXid(xid);
1681                 return -EINVAL;
1682         }
1683
1684
1685         if (srvTcp) {
1686                 cFYI(1, ("Existing tcp session with server found"));
1687         } else {        /* create socket */
1688                 if(volume_info.port)
1689                         sin_server.sin_port = htons(volume_info.port);
1690                 else
1691                         sin_server.sin_port = 0;
1692                 rc = ipv4_connect(&sin_server,&csocket,
1693                                   volume_info.source_rfc1001_name,
1694                                   volume_info.target_rfc1001_name);
1695                 if (rc < 0) {
1696                         cERROR(1,
1697                                ("Error connecting to IPv4 socket. Aborting operation"));
1698                         if(csocket != NULL)
1699                                 sock_release(csocket);
1700                         kfree(volume_info.UNC);
1701                         kfree(volume_info.password);
1702                         FreeXid(xid);
1703                         return rc;
1704                 }
1705
1706                 srvTcp = kmalloc(sizeof (struct TCP_Server_Info), GFP_KERNEL);
1707                 if (srvTcp == NULL) {
1708                         rc = -ENOMEM;
1709                         sock_release(csocket);
1710                         kfree(volume_info.UNC);
1711                         kfree(volume_info.password);
1712                         FreeXid(xid);
1713                         return rc;
1714                 } else {
1715                         memset(srvTcp, 0, sizeof (struct TCP_Server_Info));
1716                         memcpy(&srvTcp->addr.sockAddr, &sin_server, sizeof (struct sockaddr_in));
1717                         atomic_set(&srvTcp->inFlight,0);
1718                         /* BB Add code for ipv6 case too */
1719                         srvTcp->ssocket = csocket;
1720                         srvTcp->protocolType = IPV4;
1721                         init_waitqueue_head(&srvTcp->response_q);
1722                         init_waitqueue_head(&srvTcp->request_q);
1723                         INIT_LIST_HEAD(&srvTcp->pending_mid_q);
1724                         /* at this point we are the only ones with the pointer
1725                         to the struct since the kernel thread not created yet
1726                         so no need to spinlock this init of tcpStatus */
1727                         srvTcp->tcpStatus = CifsNew;
1728                         init_MUTEX(&srvTcp->tcpSem);
1729                         rc = (int)kernel_thread((void *)(void *)cifs_demultiplex_thread, srvTcp,
1730                                       CLONE_FS | CLONE_FILES | CLONE_VM);
1731                         if(rc < 0) {
1732                                 rc = -ENOMEM;
1733                                 sock_release(csocket);
1734                                 kfree(volume_info.UNC);
1735                                 kfree(volume_info.password);
1736                                 FreeXid(xid);
1737                                 return rc;
1738                         }
1739                         wait_for_completion(&cifsd_complete);
1740                         rc = 0;
1741                         memcpy(srvTcp->workstation_RFC1001_name, volume_info.source_rfc1001_name,16);
1742                         memcpy(srvTcp->server_RFC1001_name, volume_info.target_rfc1001_name,16);
1743                         srvTcp->sequence_number = 0;
1744                 }
1745         }
1746
1747         if (existingCifsSes) {
1748                 pSesInfo = existingCifsSes;
1749                 cFYI(1, ("Existing smb sess found"));
1750                 kfree(volume_info.password);
1751                 /* volume_info.UNC freed at end of function */
1752         } else if (!rc) {
1753                 cFYI(1, ("Existing smb sess not found"));
1754                 pSesInfo = sesInfoAlloc();
1755                 if (pSesInfo == NULL)
1756                         rc = -ENOMEM;
1757                 else {
1758                         pSesInfo->server = srvTcp;
1759                         sprintf(pSesInfo->serverName, "%u.%u.%u.%u",
1760                                 NIPQUAD(sin_server.sin_addr.s_addr));
1761                 }
1762
1763                 if (!rc){
1764                         /* volume_info.password freed at unmount */
1765                         if (volume_info.password)
1766                                 pSesInfo->password = volume_info.password;
1767                         if (volume_info.username)
1768                                 strncpy(pSesInfo->userName,
1769                                         volume_info.username,MAX_USERNAME_SIZE);
1770                         if (volume_info.domainname) {
1771                                 int len = strlen(volume_info.domainname);
1772                                 pSesInfo->domainName =
1773                                         kmalloc(len + 1, GFP_KERNEL);
1774                                 if(pSesInfo->domainName)
1775                                         strcpy(pSesInfo->domainName,
1776                                                 volume_info.domainname);
1777                         }
1778                         pSesInfo->linux_uid = volume_info.linux_uid;
1779                         down(&pSesInfo->sesSem);
1780                         /* BB FIXME need to pass vol->secFlgs BB */
1781                         rc = cifs_setup_session(xid,pSesInfo, cifs_sb->local_nls);
1782                         up(&pSesInfo->sesSem);
1783                         if(!rc)
1784                                 atomic_inc(&srvTcp->socketUseCount);
1785                 } else
1786                         kfree(volume_info.password);
1787         }
1788
1789         /* search for existing tcon to this server share */
1790         if (!rc) {
1791                 if(volume_info.rsize > CIFSMaxBufSize) {
1792                         cERROR(1,("rsize %d too large, using MaxBufSize",
1793                                 volume_info.rsize));
1794                         cifs_sb->rsize = CIFSMaxBufSize;
1795                 } else if((volume_info.rsize) && (volume_info.rsize <= CIFSMaxBufSize))
1796                         cifs_sb->rsize = volume_info.rsize;
1797                 else /* default */
1798                         cifs_sb->rsize = CIFSMaxBufSize;
1799
1800                 if(volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
1801                         cERROR(1,("wsize %d too large using 4096 instead",
1802                                   volume_info.wsize));
1803                         cifs_sb->wsize = 4096;
1804                 } else if(volume_info.wsize)
1805                         cifs_sb->wsize = volume_info.wsize;
1806                 else
1807                         cifs_sb->wsize =
1808                                 min_t(const int, PAGEVEC_SIZE * PAGE_CACHE_SIZE,
1809                                         127*1024);
1810                         /* old default of CIFSMaxBufSize was too small now
1811                            that SMB Write2 can send multiple pages in kvec.
1812                            RFC1001 does not describe what happens when frame
1813                            bigger than 128K is sent so use that as max in
1814                            conjunction with 52K kvec constraint on arch with 4K
1815                            page size  */
1816
1817                 if(cifs_sb->rsize < 2048) {
1818                         cifs_sb->rsize = 2048;
1819                         /* Windows ME may prefer this */
1820                         cFYI(1,("readsize set to minimum 2048"));
1821                 }
1822                 cifs_sb->mnt_uid = volume_info.linux_uid;
1823                 cifs_sb->mnt_gid = volume_info.linux_gid;
1824                 cifs_sb->mnt_file_mode = volume_info.file_mode;
1825                 cifs_sb->mnt_dir_mode = volume_info.dir_mode;
1826                 cFYI(1,("file mode: 0x%x  dir mode: 0x%x",
1827                         cifs_sb->mnt_file_mode,cifs_sb->mnt_dir_mode));
1828
1829                 if(volume_info.noperm)
1830                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
1831                 if(volume_info.setuids)
1832                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
1833                 if(volume_info.server_ino)
1834                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
1835                 if(volume_info.remap)
1836                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
1837                 if(volume_info.no_xattr)
1838                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
1839                 if(volume_info.sfu_emul)
1840                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
1841                 if(volume_info.nobrl)
1842                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
1843                 if(volume_info.cifs_acl)
1844                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
1845
1846                 if(volume_info.direct_io) {
1847                         cFYI(1,("mounting share using direct i/o"));
1848                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
1849                 }
1850
1851                 tcon =
1852                     find_unc(sin_server.sin_addr.s_addr, volume_info.UNC,
1853                              volume_info.username);
1854                 if (tcon) {
1855                         cFYI(1, ("Found match on UNC path"));
1856                         /* we can have only one retry value for a connection
1857                            to a share so for resources mounted more than once
1858                            to the same server share the last value passed in
1859                            for the retry flag is used */
1860                         tcon->retry = volume_info.retry;
1861                         tcon->nocase = volume_info.nocase;
1862                 } else {
1863                         tcon = tconInfoAlloc();
1864                         if (tcon == NULL)
1865                                 rc = -ENOMEM;
1866                         else {
1867                                 /* check for null share name ie connect to dfs root */
1868
1869                                 /* BB check if this works for exactly length three strings */
1870                                 if ((strchr(volume_info.UNC + 3, '\\') == NULL)
1871                                     && (strchr(volume_info.UNC + 3, '/') ==
1872                                         NULL)) {
1873                                         rc = connect_to_dfs_path(xid, pSesInfo,
1874                                                         "", cifs_sb->local_nls,
1875                                                         cifs_sb->mnt_cifs_flags &
1876                                                           CIFS_MOUNT_MAP_SPECIAL_CHR);
1877                                         kfree(volume_info.UNC);
1878                                         FreeXid(xid);
1879                                         return -ENODEV;
1880                                 } else {
1881                                         rc = CIFSTCon(xid, pSesInfo,
1882                                                 volume_info.UNC,
1883                                                 tcon, cifs_sb->local_nls);
1884                                         cFYI(1, ("CIFS Tcon rc = %d", rc));
1885                                 }
1886                                 if (!rc) {
1887                                         atomic_inc(&pSesInfo->inUse);
1888                                         tcon->retry = volume_info.retry;
1889                                         tcon->nocase = volume_info.nocase;
1890                                 }
1891                         }
1892                 }
1893         }
1894         if(pSesInfo) {
1895                 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
1896                         sb->s_maxbytes = (u64) 1 << 63;
1897                 } else
1898                         sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
1899         }
1900
1901         sb->s_time_gran = 100;
1902
1903 /* on error free sesinfo and tcon struct if needed */
1904         if (rc) {
1905                 /* if session setup failed, use count is zero but
1906                 we still need to free cifsd thread */
1907                 if(atomic_read(&srvTcp->socketUseCount) == 0) {
1908                         spin_lock(&GlobalMid_Lock);
1909                         srvTcp->tcpStatus = CifsExiting;
1910                         spin_unlock(&GlobalMid_Lock);
1911                         if(srvTcp->tsk) {
1912                                 send_sig(SIGKILL,srvTcp->tsk,1);
1913                                 wait_for_completion(&cifsd_complete);
1914                         }
1915                 }
1916                  /* If find_unc succeeded then rc == 0 so we can not end */
1917                 if (tcon)  /* up accidently freeing someone elses tcon struct */
1918                         tconInfoFree(tcon);
1919                 if (existingCifsSes == NULL) {
1920                         if (pSesInfo) {
1921                                 if ((pSesInfo->server) &&
1922                                     (pSesInfo->status == CifsGood)) {
1923                                         int temp_rc;
1924                                         temp_rc = CIFSSMBLogoff(xid, pSesInfo);
1925                                         /* if the socketUseCount is now zero */
1926                                         if((temp_rc == -ESHUTDOWN) &&
1927                                            (pSesInfo->server->tsk)) {
1928                                                 send_sig(SIGKILL,pSesInfo->server->tsk,1);
1929                                                 wait_for_completion(&cifsd_complete);
1930                                         }
1931                                 } else
1932                                         cFYI(1, ("No session or bad tcon"));
1933                                 sesInfoFree(pSesInfo);
1934                                 /* pSesInfo = NULL; */
1935                         }
1936                 }
1937         } else {
1938                 atomic_inc(&tcon->useCount);
1939                 cifs_sb->tcon = tcon;
1940                 tcon->ses = pSesInfo;
1941
1942                 /* do not care if following two calls succeed - informational */
1943                 CIFSSMBQFSDeviceInfo(xid, tcon);
1944                 CIFSSMBQFSAttributeInfo(xid, tcon);
1945
1946                 if (tcon->ses->capabilities & CAP_UNIX) {
1947                         if(!CIFSSMBQFSUnixInfo(xid, tcon)) {
1948                                 __u64 cap =
1949                                        le64_to_cpu(tcon->fsUnixInfo.Capability);
1950                                 cap &= CIFS_UNIX_CAP_MASK;
1951                                 if(volume_info.no_psx_acl)
1952                                         cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1953                                 else if(CIFS_UNIX_POSIX_ACL_CAP & cap) {
1954                                         cFYI(1,("negotiated posix acl support"));
1955                                         sb->s_flags |= MS_POSIXACL;
1956                                 }
1957
1958                                 if(volume_info.posix_paths == 0)
1959                                         cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1960                                 else if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
1961                                         cFYI(1,("negotiate posix pathnames"));
1962                                         cifs_sb->mnt_cifs_flags |=
1963                                                 CIFS_MOUNT_POSIX_PATHS;
1964                                 }
1965
1966                                 cFYI(1,("Negotiate caps 0x%x",(int)cap));
1967
1968                                 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
1969                                         cFYI(1,("setting capabilities failed"));
1970                                 }
1971                         }
1972                 }
1973                 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
1974                         cifs_sb->wsize = min(cifs_sb->wsize,
1975                                              (tcon->ses->server->maxBuf -
1976                                               MAX_CIFS_HDR_SIZE));
1977                 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
1978                         cifs_sb->rsize = min(cifs_sb->rsize,
1979                                              (tcon->ses->server->maxBuf -
1980                                               MAX_CIFS_HDR_SIZE));
1981         }
1982
1983         /* volume_info.password is freed above when existing session found
1984         (in which case it is not needed anymore) but when new sesion is created
1985         the password ptr is put in the new session structure (in which case the
1986         password will be freed at unmount time) */
1987         kfree(volume_info.UNC);
1988         FreeXid(xid);
1989         return rc;
1990 }
1991
1992 static int
1993 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
1994               char session_key[CIFS_SESS_KEY_SIZE],
1995               const struct nls_table *nls_codepage)
1996 {
1997         struct smb_hdr *smb_buffer;
1998         struct smb_hdr *smb_buffer_response;
1999         SESSION_SETUP_ANDX *pSMB;
2000         SESSION_SETUP_ANDX *pSMBr;
2001         char *bcc_ptr;
2002         char *user;
2003         char *domain;
2004         int rc = 0;
2005         int remaining_words = 0;
2006         int bytes_returned = 0;
2007         int len;
2008         __u32 capabilities;
2009         __u16 count;
2010
2011         cFYI(1, ("In sesssetup"));
2012         if(ses == NULL)
2013                 return -EINVAL;
2014         user = ses->userName;
2015         domain = ses->domainName;
2016         smb_buffer = cifs_buf_get();
2017         if (smb_buffer == NULL) {
2018                 return -ENOMEM;
2019         }
2020         smb_buffer_response = smb_buffer;
2021         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2022
2023         /* send SMBsessionSetup here */
2024         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2025                         NULL /* no tCon exists yet */ , 13 /* wct */ );
2026
2027         smb_buffer->Mid = GetNextMid(ses->server);
2028         pSMB->req_no_secext.AndXCommand = 0xFF;
2029         pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2030         pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2031
2032         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2033                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2034
2035         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2036                 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2037         if (ses->capabilities & CAP_UNICODE) {
2038                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2039                 capabilities |= CAP_UNICODE;
2040         }
2041         if (ses->capabilities & CAP_STATUS32) {
2042                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2043                 capabilities |= CAP_STATUS32;
2044         }
2045         if (ses->capabilities & CAP_DFS) {
2046                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2047                 capabilities |= CAP_DFS;
2048         }
2049         pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2050
2051         pSMB->req_no_secext.CaseInsensitivePasswordLength =
2052                 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2053
2054         pSMB->req_no_secext.CaseSensitivePasswordLength =
2055             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2056         bcc_ptr = pByteArea(smb_buffer);
2057         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2058         bcc_ptr += CIFS_SESS_KEY_SIZE;
2059         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2060         bcc_ptr += CIFS_SESS_KEY_SIZE;
2061
2062         if (ses->capabilities & CAP_UNICODE) {
2063                 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2064                         *bcc_ptr = 0;
2065                         bcc_ptr++;
2066                 }
2067                 if(user == NULL)
2068                         bytes_returned = 0; /* skip null user */
2069                 else
2070                         bytes_returned =
2071                                 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2072                                         nls_codepage);
2073                 /* convert number of 16 bit words to bytes */
2074                 bcc_ptr += 2 * bytes_returned;
2075                 bcc_ptr += 2;   /* trailing null */
2076                 if (domain == NULL)
2077                         bytes_returned =
2078                             cifs_strtoUCS((__le16 *) bcc_ptr,
2079                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2080                 else
2081                         bytes_returned =
2082                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2083                                           nls_codepage);
2084                 bcc_ptr += 2 * bytes_returned;
2085                 bcc_ptr += 2;
2086                 bytes_returned =
2087                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2088                                   32, nls_codepage);
2089                 bcc_ptr += 2 * bytes_returned;
2090                 bytes_returned =
2091                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release,
2092                                   32, nls_codepage);
2093                 bcc_ptr += 2 * bytes_returned;
2094                 bcc_ptr += 2;
2095                 bytes_returned =
2096                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2097                                   64, nls_codepage);
2098                 bcc_ptr += 2 * bytes_returned;
2099                 bcc_ptr += 2;
2100         } else {
2101                 if(user != NULL) {
2102                     strncpy(bcc_ptr, user, 200);
2103                     bcc_ptr += strnlen(user, 200);
2104                 }
2105                 *bcc_ptr = 0;
2106                 bcc_ptr++;
2107                 if (domain == NULL) {
2108                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2109                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2110                 } else {
2111                         strncpy(bcc_ptr, domain, 64);
2112                         bcc_ptr += strnlen(domain, 64);
2113                         *bcc_ptr = 0;
2114                         bcc_ptr++;
2115                 }
2116                 strcpy(bcc_ptr, "Linux version ");
2117                 bcc_ptr += strlen("Linux version ");
2118                 strcpy(bcc_ptr, system_utsname.release);
2119                 bcc_ptr += strlen(system_utsname.release) + 1;
2120                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2121                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2122         }
2123         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2124         smb_buffer->smb_buf_length += count;
2125         pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2126
2127         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2128                          &bytes_returned, 1);
2129         if (rc) {
2130 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2131         } else if ((smb_buffer_response->WordCount == 3)
2132                    || (smb_buffer_response->WordCount == 4)) {
2133                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2134                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2135                 if (action & GUEST_LOGIN)
2136                         cFYI(1, (" Guest login"));      /* do we want to mark SesInfo struct ? */
2137                 ses->Suid = smb_buffer_response->Uid;   /* UID left in wire format (le) */
2138                 cFYI(1, ("UID = %d ", ses->Suid));
2139          /* response can have either 3 or 4 word count - Samba sends 3 */
2140                 bcc_ptr = pByteArea(smb_buffer_response);
2141                 if ((pSMBr->resp.hdr.WordCount == 3)
2142                     || ((pSMBr->resp.hdr.WordCount == 4)
2143                         && (blob_len < pSMBr->resp.ByteCount))) {
2144                         if (pSMBr->resp.hdr.WordCount == 4)
2145                                 bcc_ptr += blob_len;
2146
2147                         if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2148                                 if ((long) (bcc_ptr) % 2) {
2149                                         remaining_words =
2150                                             (BCC(smb_buffer_response) - 1) /2;
2151                                         bcc_ptr++;      /* Unicode strings must be word aligned */
2152                                 } else {
2153                                         remaining_words =
2154                                                 BCC(smb_buffer_response) / 2;
2155                                 }
2156                                 len =
2157                                     UniStrnlen((wchar_t *) bcc_ptr,
2158                                                remaining_words - 1);
2159 /* We look for obvious messed up bcc or strings in response so we do not go off
2160    the end since (at least) WIN2K and Windows XP have a major bug in not null
2161    terminating last Unicode string in response  */
2162                                 if(ses->serverOS)
2163                                         kfree(ses->serverOS);
2164                                 ses->serverOS = kzalloc(2 * (len + 1), GFP_KERNEL);
2165                                 if(ses->serverOS == NULL)
2166                                         goto sesssetup_nomem;
2167                                 cifs_strfromUCS_le(ses->serverOS,
2168                                            (__le16 *)bcc_ptr, len,nls_codepage);
2169                                 bcc_ptr += 2 * (len + 1);
2170                                 remaining_words -= len + 1;
2171                                 ses->serverOS[2 * len] = 0;
2172                                 ses->serverOS[1 + (2 * len)] = 0;
2173                                 if (remaining_words > 0) {
2174                                         len = UniStrnlen((wchar_t *)bcc_ptr,
2175                                                          remaining_words-1);
2176                                         if(ses->serverNOS)
2177                                                 kfree(ses->serverNOS);
2178                                         ses->serverNOS = kzalloc(2 * (len + 1),GFP_KERNEL);
2179                                         if(ses->serverNOS == NULL)
2180                                                 goto sesssetup_nomem;
2181                                         cifs_strfromUCS_le(ses->serverNOS,
2182                                                            (__le16 *)bcc_ptr,len,nls_codepage);
2183                                         bcc_ptr += 2 * (len + 1);
2184                                         ses->serverNOS[2 * len] = 0;
2185                                         ses->serverNOS[1 + (2 * len)] = 0;
2186                                         if(strncmp(ses->serverNOS,
2187                                                 "NT LAN Manager 4",16) == 0) {
2188                                                 cFYI(1,("NT4 server"));
2189                                                 ses->flags |= CIFS_SES_NT4;
2190                                         }
2191                                         remaining_words -= len + 1;
2192                                         if (remaining_words > 0) {
2193                                                 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2194           /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2195                                                 if(ses->serverDomain)
2196                                                         kfree(ses->serverDomain);
2197                                                 ses->serverDomain =
2198                                                     kzalloc(2*(len+1),GFP_KERNEL);
2199                                                 if(ses->serverDomain == NULL)
2200                                                         goto sesssetup_nomem;
2201                                                 cifs_strfromUCS_le(ses->serverDomain,
2202                                                      (__le16 *)bcc_ptr,len,nls_codepage);
2203                                                 bcc_ptr += 2 * (len + 1);
2204                                                 ses->serverDomain[2*len] = 0;
2205                                                 ses->serverDomain[1+(2*len)] = 0;
2206                                         } /* else no more room so create dummy domain string */
2207                                         else {
2208                                                 if(ses->serverDomain)
2209                                                         kfree(ses->serverDomain);
2210                                                 ses->serverDomain =
2211                                                         kzalloc(2, GFP_KERNEL);
2212                                         }
2213                                 } else {        /* no room so create dummy domain and NOS string */
2214                                         /* if these kcallocs fail not much we
2215                                            can do, but better to not fail the
2216                                            sesssetup itself */
2217                                         if(ses->serverDomain)
2218                                                 kfree(ses->serverDomain);
2219                                         ses->serverDomain =
2220                                             kzalloc(2, GFP_KERNEL);
2221                                         if(ses->serverNOS)
2222                                                 kfree(ses->serverNOS);
2223                                         ses->serverNOS =
2224                                             kzalloc(2, GFP_KERNEL);
2225                                 }
2226                         } else {        /* ASCII */
2227                                 len = strnlen(bcc_ptr, 1024);
2228                                 if (((long) bcc_ptr + len) - (long)
2229                                     pByteArea(smb_buffer_response)
2230                                             <= BCC(smb_buffer_response)) {
2231                                         if(ses->serverOS)
2232                                                 kfree(ses->serverOS);
2233                                         ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
2234                                         if(ses->serverOS == NULL)
2235                                                 goto sesssetup_nomem;
2236                                         strncpy(ses->serverOS,bcc_ptr, len);
2237
2238                                         bcc_ptr += len;
2239                                         bcc_ptr[0] = 0; /* null terminate the string */
2240                                         bcc_ptr++;
2241
2242                                         len = strnlen(bcc_ptr, 1024);
2243                                         if(ses->serverNOS)
2244                                                 kfree(ses->serverNOS);
2245                                         ses->serverNOS = kzalloc(len + 1,GFP_KERNEL);
2246                                         if(ses->serverNOS == NULL)
2247                                                 goto sesssetup_nomem;
2248                                         strncpy(ses->serverNOS, bcc_ptr, len);
2249                                         bcc_ptr += len;
2250                                         bcc_ptr[0] = 0;
2251                                         bcc_ptr++;
2252
2253                                         len = strnlen(bcc_ptr, 1024);
2254                                         if(ses->serverDomain)
2255                                                 kfree(ses->serverDomain);
2256                                         ses->serverDomain = kzalloc(len + 1,GFP_KERNEL);
2257                                         if(ses->serverDomain == NULL)
2258                                                 goto sesssetup_nomem;
2259                                         strncpy(ses->serverDomain, bcc_ptr, len);
2260                                         bcc_ptr += len;
2261                                         bcc_ptr[0] = 0;
2262                                         bcc_ptr++;
2263                                 } else
2264                                         cFYI(1,
2265                                              ("Variable field of length %d extends beyond end of smb ",
2266                                               len));
2267                         }
2268                 } else {
2269                         cERROR(1,
2270                                (" Security Blob Length extends beyond end of SMB"));
2271                 }
2272         } else {
2273                 cERROR(1,
2274                        (" Invalid Word count %d: ",
2275                         smb_buffer_response->WordCount));
2276                 rc = -EIO;
2277         }
2278 sesssetup_nomem:        /* do not return an error on nomem for the info strings,
2279                            since that could make reconnection harder, and
2280                            reconnection might be needed to free memory */
2281         if (smb_buffer)
2282                 cifs_buf_release(smb_buffer);
2283
2284         return rc;
2285 }
2286
2287 static int
2288 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2289                               struct cifsSesInfo *ses, int * pNTLMv2_flag,
2290                               const struct nls_table *nls_codepage)
2291 {
2292         struct smb_hdr *smb_buffer;
2293         struct smb_hdr *smb_buffer_response;
2294         SESSION_SETUP_ANDX *pSMB;
2295         SESSION_SETUP_ANDX *pSMBr;
2296         char *bcc_ptr;
2297         char *domain;
2298         int rc = 0;
2299         int remaining_words = 0;
2300         int bytes_returned = 0;
2301         int len;
2302         int SecurityBlobLength = sizeof (NEGOTIATE_MESSAGE);
2303         PNEGOTIATE_MESSAGE SecurityBlob;
2304         PCHALLENGE_MESSAGE SecurityBlob2;
2305         __u32 negotiate_flags, capabilities;
2306         __u16 count;
2307
2308         cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
2309         if(ses == NULL)
2310                 return -EINVAL;
2311         domain = ses->domainName;
2312         *pNTLMv2_flag = FALSE;
2313         smb_buffer = cifs_buf_get();
2314         if (smb_buffer == NULL) {
2315                 return -ENOMEM;
2316         }
2317         smb_buffer_response = smb_buffer;
2318         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2319         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2320
2321         /* send SMBsessionSetup here */
2322         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2323                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2324
2325         smb_buffer->Mid = GetNextMid(ses->server);
2326         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2327         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2328
2329         pSMB->req.AndXCommand = 0xFF;
2330         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2331         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2332
2333         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2334                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2335
2336         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2337             CAP_EXTENDED_SECURITY;
2338         if (ses->capabilities & CAP_UNICODE) {
2339                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2340                 capabilities |= CAP_UNICODE;
2341         }
2342         if (ses->capabilities & CAP_STATUS32) {
2343                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2344                 capabilities |= CAP_STATUS32;
2345         }
2346         if (ses->capabilities & CAP_DFS) {
2347                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2348                 capabilities |= CAP_DFS;
2349         }
2350         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2351
2352         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2353         SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2354         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2355         SecurityBlob->MessageType = NtLmNegotiate;
2356         negotiate_flags =
2357             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2358             NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
2359             NTLMSSP_NEGOTIATE_56 |
2360             /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2361         if(sign_CIFS_PDUs)
2362                 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2363 /*      if(ntlmv2_support)
2364                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;*/
2365         /* setup pointers to domain name and workstation name */
2366         bcc_ptr += SecurityBlobLength;
2367
2368         SecurityBlob->WorkstationName.Buffer = 0;
2369         SecurityBlob->WorkstationName.Length = 0;
2370         SecurityBlob->WorkstationName.MaximumLength = 0;
2371
2372         /* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
2373         along with username on auth request (ie the response to challenge) */
2374         SecurityBlob->DomainName.Buffer = 0;
2375         SecurityBlob->DomainName.Length = 0;
2376         SecurityBlob->DomainName.MaximumLength = 0;
2377         if (ses->capabilities & CAP_UNICODE) {
2378                 if ((long) bcc_ptr % 2) {
2379                         *bcc_ptr = 0;
2380                         bcc_ptr++;
2381                 }
2382
2383                 bytes_returned =
2384                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2385                                   32, nls_codepage);
2386                 bcc_ptr += 2 * bytes_returned;
2387                 bytes_returned =
2388                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release, 32,
2389                                   nls_codepage);
2390                 bcc_ptr += 2 * bytes_returned;
2391                 bcc_ptr += 2;   /* null terminate Linux version */
2392                 bytes_returned =
2393                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2394                                   64, nls_codepage);
2395                 bcc_ptr += 2 * bytes_returned;
2396                 *(bcc_ptr + 1) = 0;
2397                 *(bcc_ptr + 2) = 0;
2398                 bcc_ptr += 2;   /* null terminate network opsys string */
2399                 *(bcc_ptr + 1) = 0;
2400                 *(bcc_ptr + 2) = 0;
2401                 bcc_ptr += 2;   /* null domain */
2402         } else {                /* ASCII */
2403                 strcpy(bcc_ptr, "Linux version ");
2404                 bcc_ptr += strlen("Linux version ");
2405                 strcpy(bcc_ptr, system_utsname.release);
2406                 bcc_ptr += strlen(system_utsname.release) + 1;
2407                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2408                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2409                 bcc_ptr++;      /* empty domain field */
2410                 *bcc_ptr = 0;
2411         }
2412         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2413         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2414         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2415         smb_buffer->smb_buf_length += count;
2416         pSMB->req.ByteCount = cpu_to_le16(count);
2417
2418         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2419                          &bytes_returned, 1);
2420
2421         if (smb_buffer_response->Status.CifsError ==
2422             cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
2423                 rc = 0;
2424
2425         if (rc) {
2426 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2427         } else if ((smb_buffer_response->WordCount == 3)
2428                    || (smb_buffer_response->WordCount == 4)) {
2429                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2430                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2431
2432                 if (action & GUEST_LOGIN)
2433                         cFYI(1, (" Guest login"));
2434         /* Do we want to set anything in SesInfo struct when guest login? */
2435
2436                 bcc_ptr = pByteArea(smb_buffer_response);
2437         /* response can have either 3 or 4 word count - Samba sends 3 */
2438
2439                 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
2440                 if (SecurityBlob2->MessageType != NtLmChallenge) {
2441                         cFYI(1,
2442                              ("Unexpected NTLMSSP message type received %d",
2443                               SecurityBlob2->MessageType));
2444                 } else if (ses) {
2445                         ses->Suid = smb_buffer_response->Uid; /* UID left in le format */
2446                         cFYI(1, ("UID = %d", ses->Suid));
2447                         if ((pSMBr->resp.hdr.WordCount == 3)
2448                             || ((pSMBr->resp.hdr.WordCount == 4)
2449                                 && (blob_len <
2450                                     pSMBr->resp.ByteCount))) {
2451
2452                                 if (pSMBr->resp.hdr.WordCount == 4) {
2453                                         bcc_ptr += blob_len;
2454                                         cFYI(1, ("Security Blob Length %d",
2455                                               blob_len));
2456                                 }
2457
2458                                 cFYI(1, ("NTLMSSP Challenge rcvd"));
2459
2460                                 memcpy(ses->server->cryptKey,
2461                                        SecurityBlob2->Challenge,
2462                                        CIFS_CRYPTO_KEY_SIZE);
2463                                 if(SecurityBlob2->NegotiateFlags &
2464                                         cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
2465                                         *pNTLMv2_flag = TRUE;
2466
2467                                 if((SecurityBlob2->NegotiateFlags &
2468                                         cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN))
2469                                         || (sign_CIFS_PDUs > 1))
2470                                                 ses->server->secMode |=
2471                                                         SECMODE_SIGN_REQUIRED;
2472                                 if ((SecurityBlob2->NegotiateFlags &
2473                                         cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
2474                                                 ses->server->secMode |=
2475                                                         SECMODE_SIGN_ENABLED;
2476
2477                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2478                                         if ((long) (bcc_ptr) % 2) {
2479                                                 remaining_words =
2480                                                     (BCC(smb_buffer_response)
2481                                                      - 1) / 2;
2482                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
2483                                         } else {
2484                                                 remaining_words =
2485                                                     BCC
2486                                                     (smb_buffer_response) / 2;
2487                                         }
2488                                         len =
2489                                             UniStrnlen((wchar_t *) bcc_ptr,
2490                                                        remaining_words - 1);
2491 /* We look for obvious messed up bcc or strings in response so we do not go off
2492    the end since (at least) WIN2K and Windows XP have a major bug in not null
2493    terminating last Unicode string in response  */
2494                                         if(ses->serverOS)
2495                                                 kfree(ses->serverOS);
2496                                         ses->serverOS =
2497                                             kzalloc(2 * (len + 1), GFP_KERNEL);
2498                                         cifs_strfromUCS_le(ses->serverOS,
2499                                                            (__le16 *)
2500                                                            bcc_ptr, len,
2501                                                            nls_codepage);
2502                                         bcc_ptr += 2 * (len + 1);
2503                                         remaining_words -= len + 1;
2504                                         ses->serverOS[2 * len] = 0;
2505                                         ses->serverOS[1 + (2 * len)] = 0;
2506                                         if (remaining_words > 0) {
2507                                                 len = UniStrnlen((wchar_t *)
2508                                                                  bcc_ptr,
2509                                                                  remaining_words
2510                                                                  - 1);
2511                                                 if(ses->serverNOS)
2512                                                         kfree(ses->serverNOS);
2513                                                 ses->serverNOS =
2514                                                     kzalloc(2 * (len + 1),
2515                                                             GFP_KERNEL);
2516                                                 cifs_strfromUCS_le(ses->
2517                                                                    serverNOS,
2518                                                                    (__le16 *)
2519                                                                    bcc_ptr,
2520                                                                    len,
2521                                                                    nls_codepage);
2522                                                 bcc_ptr += 2 * (len + 1);
2523                                                 ses->serverNOS[2 * len] = 0;
2524                                                 ses->serverNOS[1 +
2525                                                                (2 * len)] = 0;
2526                                                 remaining_words -= len + 1;
2527                                                 if (remaining_words > 0) {
2528                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2529            /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2530                                                         if(ses->serverDomain)
2531                                                                 kfree(ses->serverDomain);
2532                                                         ses->serverDomain =
2533                                                             kzalloc(2 *
2534                                                                     (len +
2535                                                                      1),
2536                                                                     GFP_KERNEL);
2537                                                         cifs_strfromUCS_le
2538                                                             (ses->serverDomain,
2539                                                              (__le16 *)bcc_ptr,
2540                                                              len, nls_codepage);
2541                                                         bcc_ptr +=
2542                                                             2 * (len + 1);
2543                                                         ses->serverDomain[2*len]
2544                                                             = 0;
2545                                                         ses->serverDomain
2546                                                                 [1 + (2 * len)]
2547                                                             = 0;
2548                                                 } /* else no more room so create dummy domain string */
2549                                                 else {
2550                                                         if(ses->serverDomain)
2551                                                                 kfree(ses->serverDomain);
2552                                                         ses->serverDomain =
2553                                                             kzalloc(2,
2554                                                                     GFP_KERNEL);
2555                                                 }
2556                                         } else {        /* no room so create dummy domain and NOS string */
2557                                                 if(ses->serverDomain);
2558                                                         kfree(ses->serverDomain);
2559                                                 ses->serverDomain =
2560                                                     kzalloc(2, GFP_KERNEL);
2561                                                 if(ses->serverNOS)
2562                                                         kfree(ses->serverNOS);
2563                                                 ses->serverNOS =
2564                                                     kzalloc(2, GFP_KERNEL);
2565                                         }
2566                                 } else {        /* ASCII */
2567                                         len = strnlen(bcc_ptr, 1024);
2568                                         if (((long) bcc_ptr + len) - (long)
2569                                             pByteArea(smb_buffer_response)
2570                                             <= BCC(smb_buffer_response)) {
2571                                                 if(ses->serverOS)
2572                                                         kfree(ses->serverOS);
2573                                                 ses->serverOS =
2574                                                     kzalloc(len + 1,
2575                                                             GFP_KERNEL);
2576                                                 strncpy(ses->serverOS,
2577                                                         bcc_ptr, len);
2578
2579                                                 bcc_ptr += len;
2580                                                 bcc_ptr[0] = 0; /* null terminate string */
2581                                                 bcc_ptr++;
2582
2583                                                 len = strnlen(bcc_ptr, 1024);
2584                                                 if(ses->serverNOS)
2585                                                         kfree(ses->serverNOS);
2586                                                 ses->serverNOS =
2587                                                     kzalloc(len + 1,
2588                                                             GFP_KERNEL);
2589                                                 strncpy(ses->serverNOS, bcc_ptr, len);
2590                                                 bcc_ptr += len;
2591                                                 bcc_ptr[0] = 0;
2592                                                 bcc_ptr++;
2593
2594                                                 len = strnlen(bcc_ptr, 1024);
2595                                                 if(ses->serverDomain)
2596                                                         kfree(ses->serverDomain);
2597                                                 ses->serverDomain =
2598                                                     kzalloc(len + 1,
2599                                                             GFP_KERNEL);
2600                                                 strncpy(ses->serverDomain, bcc_ptr, len);
2601                                                 bcc_ptr += len;
2602                                                 bcc_ptr[0] = 0;
2603                                                 bcc_ptr++;
2604                                         } else
2605                                                 cFYI(1,
2606                                                      ("Variable field of length %d extends beyond end of smb",
2607                                                       len));
2608                                 }
2609                         } else {
2610                                 cERROR(1,
2611                                        (" Security Blob Length extends beyond end of SMB"));
2612                         }
2613                 } else {
2614                         cERROR(1, ("No session structure passed in."));
2615                 }
2616         } else {
2617                 cERROR(1,
2618                        (" Invalid Word count %d:",
2619                         smb_buffer_response->WordCount));
2620                 rc = -EIO;
2621         }
2622
2623         if (smb_buffer)
2624                 cifs_buf_release(smb_buffer);
2625
2626         return rc;
2627 }
2628 static int
2629 CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2630                 char *ntlm_session_key, int ntlmv2_flag,
2631                 const struct nls_table *nls_codepage)
2632 {
2633         struct smb_hdr *smb_buffer;
2634         struct smb_hdr *smb_buffer_response;
2635         SESSION_SETUP_ANDX *pSMB;
2636         SESSION_SETUP_ANDX *pSMBr;
2637         char *bcc_ptr;
2638         char *user;
2639         char *domain;
2640         int rc = 0;
2641         int remaining_words = 0;
2642         int bytes_returned = 0;
2643         int len;
2644         int SecurityBlobLength = sizeof (AUTHENTICATE_MESSAGE);
2645         PAUTHENTICATE_MESSAGE SecurityBlob;
2646         __u32 negotiate_flags, capabilities;
2647         __u16 count;
2648
2649         cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
2650         if(ses == NULL)
2651                 return -EINVAL;
2652         user = ses->userName;
2653         domain = ses->domainName;
2654         smb_buffer = cifs_buf_get();
2655         if (smb_buffer == NULL) {
2656                 return -ENOMEM;
2657         }
2658         smb_buffer_response = smb_buffer;
2659         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2660         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2661
2662         /* send SMBsessionSetup here */
2663         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2664                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2665
2666         smb_buffer->Mid = GetNextMid(ses->server);
2667         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2668         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2669         pSMB->req.AndXCommand = 0xFF;
2670         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2671         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2672
2673         pSMB->req.hdr.Uid = ses->Suid;
2674
2675         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2676                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2677
2678         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2679             CAP_EXTENDED_SECURITY;
2680         if (ses->capabilities & CAP_UNICODE) {
2681                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2682                 capabilities |= CAP_UNICODE;
2683         }
2684         if (ses->capabilities & CAP_STATUS32) {
2685                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2686                 capabilities |= CAP_STATUS32;
2687         }
2688         if (ses->capabilities & CAP_DFS) {
2689                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2690                 capabilities |= CAP_DFS;
2691         }
2692         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2693
2694         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2695         SecurityBlob = (PAUTHENTICATE_MESSAGE) bcc_ptr;
2696         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2697         SecurityBlob->MessageType = NtLmAuthenticate;
2698         bcc_ptr += SecurityBlobLength;
2699         negotiate_flags =
2700             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
2701             NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
2702             0x80000000 | NTLMSSP_NEGOTIATE_128;
2703         if(sign_CIFS_PDUs)
2704                 negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
2705         if(ntlmv2_flag)
2706                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
2707
2708 /* setup pointers to domain name and workstation name */
2709
2710         SecurityBlob->WorkstationName.Buffer = 0;
2711         SecurityBlob->WorkstationName.Length = 0;
2712         SecurityBlob->WorkstationName.MaximumLength = 0;
2713         SecurityBlob->SessionKey.Length = 0;
2714         SecurityBlob->SessionKey.MaximumLength = 0;
2715         SecurityBlob->SessionKey.Buffer = 0;
2716
2717         SecurityBlob->LmChallengeResponse.Length = 0;
2718         SecurityBlob->LmChallengeResponse.MaximumLength = 0;
2719         SecurityBlob->LmChallengeResponse.Buffer = 0;
2720
2721         SecurityBlob->NtChallengeResponse.Length =
2722             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2723         SecurityBlob->NtChallengeResponse.MaximumLength =
2724             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2725         memcpy(bcc_ptr, ntlm_session_key, CIFS_SESS_KEY_SIZE);
2726         SecurityBlob->NtChallengeResponse.Buffer =
2727             cpu_to_le32(SecurityBlobLength);
2728         SecurityBlobLength += CIFS_SESS_KEY_SIZE;
2729         bcc_ptr += CIFS_SESS_KEY_SIZE;
2730
2731         if (ses->capabilities & CAP_UNICODE) {
2732                 if (domain == NULL) {
2733                         SecurityBlob->DomainName.Buffer = 0;
2734                         SecurityBlob->DomainName.Length = 0;
2735                         SecurityBlob->DomainName.MaximumLength = 0;
2736                 } else {
2737                         __u16 len =
2738                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2739                                           nls_codepage);
2740                         len *= 2;
2741                         SecurityBlob->DomainName.MaximumLength =
2742                             cpu_to_le16(len);
2743                         SecurityBlob->DomainName.Buffer =
2744                             cpu_to_le32(SecurityBlobLength);
2745                         bcc_ptr += len;
2746                         SecurityBlobLength += len;
2747                         SecurityBlob->DomainName.Length =
2748                             cpu_to_le16(len);
2749                 }
2750                 if (user == NULL) {
2751                         SecurityBlob->UserName.Buffer = 0;
2752                         SecurityBlob->UserName.Length = 0;
2753                         SecurityBlob->UserName.MaximumLength = 0;
2754                 } else {
2755                         __u16 len =
2756                             cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
2757                                           nls_codepage);
2758                         len *= 2;
2759                         SecurityBlob->UserName.MaximumLength =
2760                             cpu_to_le16(len);
2761                         SecurityBlob->UserName.Buffer =
2762                             cpu_to_le32(SecurityBlobLength);
2763                         bcc_ptr += len;
2764                         SecurityBlobLength += len;
2765                         SecurityBlob->UserName.Length =
2766                             cpu_to_le16(len);
2767                 }
2768
2769                 /* SecurityBlob->WorkstationName.Length = cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
2770                    SecurityBlob->WorkstationName.Length *= 2;
2771                    SecurityBlob->WorkstationName.MaximumLength = cpu_to_le16(SecurityBlob->WorkstationName.Length);
2772                    SecurityBlob->WorkstationName.Buffer = cpu_to_le32(SecurityBlobLength);
2773                    bcc_ptr += SecurityBlob->WorkstationName.Length;
2774                    SecurityBlobLength += SecurityBlob->WorkstationName.Length;
2775                    SecurityBlob->WorkstationName.Length = cpu_to_le16(SecurityBlob->WorkstationName.Length);  */
2776
2777                 if ((long) bcc_ptr % 2) {
2778                         *bcc_ptr = 0;
2779                         bcc_ptr++;
2780                 }
2781                 bytes_returned =
2782                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2783                                   32, nls_codepage);
2784                 bcc_ptr += 2 * bytes_returned;
2785                 bytes_returned =
2786                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release, 32,
2787                                   nls_codepage);
2788                 bcc_ptr += 2 * bytes_returned;
2789                 bcc_ptr += 2;   /* null term version string */
2790                 bytes_returned =
2791                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2792                                   64, nls_codepage);
2793                 bcc_ptr += 2 * bytes_returned;
2794                 *(bcc_ptr + 1) = 0;
2795                 *(bcc_ptr + 2) = 0;
2796                 bcc_ptr += 2;   /* null terminate network opsys string */
2797                 *(bcc_ptr + 1) = 0;
2798                 *(bcc_ptr + 2) = 0;
2799                 bcc_ptr += 2;   /* null domain */
2800         } else {                /* ASCII */
2801                 if (domain == NULL) {
2802                         SecurityBlob->DomainName.Buffer = 0;
2803                         SecurityBlob->DomainName.Length = 0;
2804                         SecurityBlob->DomainName.MaximumLength = 0;
2805                 } else {
2806                         __u16 len;
2807                         negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
2808                         strncpy(bcc_ptr, domain, 63);
2809                         len = strnlen(domain, 64);
2810                         SecurityBlob->DomainName.MaximumLength =
2811                             cpu_to_le16(len);
2812                         SecurityBlob->DomainName.Buffer =
2813                             cpu_to_le32(SecurityBlobLength);
2814                         bcc_ptr += len;
2815                         SecurityBlobLength += len;
2816                         SecurityBlob->DomainName.Length = cpu_to_le16(len);
2817                 }
2818                 if (user == NULL) {
2819                         SecurityBlob->UserName.Buffer = 0;
2820                         SecurityBlob->UserName.Length = 0;
2821                         SecurityBlob->UserName.MaximumLength = 0;
2822                 } else {
2823                         __u16 len;
2824                         strncpy(bcc_ptr, user, 63);
2825                         len = strnlen(user, 64);
2826                         SecurityBlob->UserName.MaximumLength =
2827                             cpu_to_le16(len);
2828                         SecurityBlob->UserName.Buffer =
2829                             cpu_to_le32(SecurityBlobLength);
2830                         bcc_ptr += len;
2831                         SecurityBlobLength += len;
2832                         SecurityBlob->UserName.Length = cpu_to_le16(len);
2833                 }
2834                 /* BB fill in our workstation name if known BB */
2835
2836                 strcpy(bcc_ptr, "Linux version ");
2837                 bcc_ptr += strlen("Linux version ");
2838                 strcpy(bcc_ptr, system_utsname.release);
2839                 bcc_ptr += strlen(system_utsname.release) + 1;
2840                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2841                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2842                 bcc_ptr++;      /* null domain */
2843                 *bcc_ptr = 0;
2844         }
2845         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2846         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2847         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2848         smb_buffer->smb_buf_length += count;
2849         pSMB->req.ByteCount = cpu_to_le16(count);
2850
2851         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2852                          &bytes_returned, 1);
2853         if (rc) {
2854 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2855         } else if ((smb_buffer_response->WordCount == 3)
2856                    || (smb_buffer_response->WordCount == 4)) {
2857                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2858                 __u16 blob_len =
2859                     le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2860                 if (action & GUEST_LOGIN)
2861                         cFYI(1, (" Guest login"));      /* BB do we want to set anything in SesInfo struct ? */
2862 /*        if(SecurityBlob2->MessageType != NtLm??){
2863                  cFYI("Unexpected message type on auth response is %d "));
2864         } */
2865                 if (ses) {
2866                         cFYI(1,
2867                              ("Does UID on challenge %d match auth response UID %d ",
2868                               ses->Suid, smb_buffer_response->Uid));
2869                         ses->Suid = smb_buffer_response->Uid; /* UID left in wire format */
2870                         bcc_ptr = pByteArea(smb_buffer_response);
2871             /* response can have either 3 or 4 word count - Samba sends 3 */
2872                         if ((pSMBr->resp.hdr.WordCount == 3)
2873                             || ((pSMBr->resp.hdr.WordCount == 4)
2874                                 && (blob_len <
2875                                     pSMBr->resp.ByteCount))) {
2876                                 if (pSMBr->resp.hdr.WordCount == 4) {
2877                                         bcc_ptr +=
2878                                             blob_len;
2879                                         cFYI(1,
2880                                              ("Security Blob Length %d ",
2881                                               blob_len));
2882                                 }
2883
2884                                 cFYI(1,
2885                                      ("NTLMSSP response to Authenticate "));
2886
2887                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2888                                         if ((long) (bcc_ptr) % 2) {
2889                                                 remaining_words =
2890                                                     (BCC(smb_buffer_response)
2891                                                      - 1) / 2;
2892                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
2893                                         } else {
2894                                                 remaining_words = BCC(smb_buffer_response) / 2;
2895                                         }
2896                                         len =
2897                                             UniStrnlen((wchar_t *) bcc_ptr,remaining_words - 1);
2898 /* We look for obvious messed up bcc or strings in response so we do not go off
2899   the end since (at least) WIN2K and Windows XP have a major bug in not null
2900   terminating last Unicode string in response  */
2901                                         if(ses->serverOS)
2902                                                 kfree(ses->serverOS);
2903                                         ses->serverOS =
2904                                             kzalloc(2 * (len + 1), GFP_KERNEL);
2905                                         cifs_strfromUCS_le(ses->serverOS,
2906                                                            (__le16 *)
2907                                                            bcc_ptr, len,
2908                                                            nls_codepage);
2909                                         bcc_ptr += 2 * (len + 1);
2910                                         remaining_words -= len + 1;
2911                                         ses->serverOS[2 * len] = 0;
2912                                         ses->serverOS[1 + (2 * len)] = 0;
2913                                         if (remaining_words > 0) {
2914                                                 len = UniStrnlen((wchar_t *)
2915                                                                  bcc_ptr,
2916                                                                  remaining_words
2917                                                                  - 1);
2918                                                 if(ses->serverNOS)
2919                                                         kfree(ses->serverNOS);
2920                                                 ses->serverNOS =
2921                                                     kzalloc(2 * (len + 1),
2922                                                             GFP_KERNEL);
2923                                                 cifs_strfromUCS_le(ses->
2924                                                                    serverNOS,
2925                                                                    (__le16 *)
2926                                                                    bcc_ptr,
2927                                                                    len,
2928                                                                    nls_codepage);
2929                                                 bcc_ptr += 2 * (len + 1);
2930                                                 ses->serverNOS[2 * len] = 0;
2931                                                 ses->serverNOS[1+(2*len)] = 0;
2932                                                 remaining_words -= len + 1;
2933                                                 if (remaining_words > 0) {
2934                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2935      /* last string not always null terminated (e.g. for Windows XP & 2000) */
2936                                                         if(ses->serverDomain)
2937                                                                 kfree(ses->serverDomain);
2938                                                         ses->serverDomain =
2939                                                             kzalloc(2 *
2940                                                                     (len +
2941                                                                      1),
2942                                                                     GFP_KERNEL);
2943                                                         cifs_strfromUCS_le
2944                                                             (ses->
2945                                                              serverDomain,
2946                                                              (__le16 *)
2947                                                              bcc_ptr, len,
2948                                                              nls_codepage);
2949                                                         bcc_ptr +=
2950                                                             2 * (len + 1);
2951                                                         ses->
2952                                                             serverDomain[2
2953                                                                          * len]
2954                                                             = 0;
2955                                                         ses->
2956                                                             serverDomain[1
2957                                                                          +
2958                                                                          (2
2959                                                                           *
2960                                                                           len)]
2961                                                             = 0;
2962                                                 } /* else no more room so create dummy domain string */
2963                                                 else {
2964                                                         if(ses->serverDomain)
2965                                                                 kfree(ses->serverDomain);
2966                                                         ses->serverDomain = kzalloc(2,GFP_KERNEL);
2967                                                 }
2968                                         } else {  /* no room so create dummy domain and NOS string */
2969                                                 if(ses->serverDomain)
2970                                                         kfree(ses->serverDomain);
2971                                                 ses->serverDomain = kzalloc(2, GFP_KERNEL);
2972                                                 if(ses->serverNOS)
2973                                                         kfree(ses->serverNOS);
2974                                                 ses->serverNOS = kzalloc(2, GFP_KERNEL);
2975                                         }
2976                                 } else {        /* ASCII */
2977                                         len = strnlen(bcc_ptr, 1024);
2978                                         if (((long) bcc_ptr + len) -
2979                         (long) pByteArea(smb_buffer_response)
2980                             <= BCC(smb_buffer_response)) {
2981                                                 if(ses->serverOS)
2982                                                         kfree(ses->serverOS);
2983                                                 ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
2984                                                 strncpy(ses->serverOS,bcc_ptr, len);
2985
2986                                                 bcc_ptr += len;
2987                                                 bcc_ptr[0] = 0; /* null terminate the string */
2988                                                 bcc_ptr++;
2989
2990                                                 len = strnlen(bcc_ptr, 1024);
2991                                                 if(ses->serverNOS)
2992                                                         kfree(ses->serverNOS);
2993                                                 ses->serverNOS = kzalloc(len+1,GFP_KERNEL);
2994                                                 strncpy(ses->serverNOS, bcc_ptr, len);
2995                                                 bcc_ptr += len;
2996                                                 bcc_ptr[0] = 0;
2997                                                 bcc_ptr++;
2998
2999                                                 len = strnlen(bcc_ptr, 1024);
3000                                                 if(ses->serverDomain)
3001                                                         kfree(ses->serverDomain);
3002                                                 ses->serverDomain = kzalloc(len+1,GFP_KERNEL);
3003                                                 strncpy(ses->serverDomain, bcc_ptr, len);
3004                                                 bcc_ptr += len;
3005                                                 bcc_ptr[0] = 0;
3006                                                 bcc_ptr++;
3007                                         } else
3008                                                 cFYI(1,
3009                                                      ("Variable field of length %d extends beyond end of smb ",
3010                                                       len));
3011                                 }
3012                         } else {
3013                                 cERROR(1,
3014                                        (" Security Blob Length extends beyond end of SMB"));
3015                         }
3016                 } else {
3017                         cERROR(1, ("No session structure passed in."));
3018                 }
3019         } else {
3020                 cERROR(1,
3021                        (" Invalid Word count %d: ",
3022                         smb_buffer_response->WordCount));
3023                 rc = -EIO;
3024         }
3025
3026         if (smb_buffer)
3027                 cifs_buf_release(smb_buffer);
3028
3029         return rc;
3030 }
3031
3032 int
3033 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
3034          const char *tree, struct cifsTconInfo *tcon,
3035          const struct nls_table *nls_codepage)
3036 {
3037         struct smb_hdr *smb_buffer;
3038         struct smb_hdr *smb_buffer_response;
3039         TCONX_REQ *pSMB;
3040         TCONX_RSP *pSMBr;
3041         unsigned char *bcc_ptr;
3042         int rc = 0;
3043         int length;
3044         __u16 count;
3045
3046         if (ses == NULL)
3047                 return -EIO;
3048
3049         smb_buffer = cifs_buf_get();
3050         if (smb_buffer == NULL) {
3051                 return -ENOMEM;
3052         }
3053         smb_buffer_response = smb_buffer;
3054
3055         header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3056                         NULL /*no tid */ , 4 /*wct */ );
3057
3058         smb_buffer->Mid = GetNextMid(ses->server);
3059         smb_buffer->Uid = ses->Suid;
3060         pSMB = (TCONX_REQ *) smb_buffer;
3061         pSMBr = (TCONX_RSP *) smb_buffer_response;
3062
3063         pSMB->AndXCommand = 0xFF;
3064         pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3065         bcc_ptr = &pSMB->Password[0];
3066         if((ses->server->secMode) & SECMODE_USER) {
3067                 pSMB->PasswordLength = cpu_to_le16(1);  /* minimum */
3068                 *bcc_ptr = 0; /* password is null byte */
3069                 bcc_ptr++;              /* skip password */
3070                 /* already aligned so no need to do it below */
3071         } else {
3072                 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
3073                 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3074                    specified as required (when that support is added to
3075                    the vfs in the future) as only NTLM or the much
3076                    weaker LANMAN (which we do not send by default) is accepted
3077                    by Samba (not sure whether other servers allow
3078                    NTLMv2 password here) */
3079 #ifdef CONFIG_CIFS_WEAK_PW_HASH
3080                 if((extended_security & CIFSSEC_MAY_LANMAN) &&
3081                         (ses->server->secType == LANMAN))
3082                         calc_lanman_hash(ses, bcc_ptr);
3083                 else
3084 #endif /* CIFS_WEAK_PW_HASH */
3085                 SMBNTencrypt(ses->password,
3086                              ses->server->cryptKey,
3087                              bcc_ptr);
3088
3089                 bcc_ptr += CIFS_SESS_KEY_SIZE;
3090                 if(ses->capabilities & CAP_UNICODE) {
3091                         /* must align unicode strings */
3092                         *bcc_ptr = 0; /* null byte password */
3093                         bcc_ptr++;
3094                 }
3095         }
3096
3097         if(ses->server->secMode &
3098                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3099                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3100
3101         if (ses->capabilities & CAP_STATUS32) {
3102                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3103         }
3104         if (ses->capabilities & CAP_DFS) {
3105                 smb_buffer->Flags2 |= SMBFLG2_DFS;
3106         }
3107         if (ses->capabilities & CAP_UNICODE) {
3108                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3109                 length =
3110                     cifs_strtoUCS((__le16 *) bcc_ptr, tree,
3111                         6 /* max utf8 char length in bytes */ *
3112                         (/* server len*/ + 256 /* share len */), nls_codepage);
3113                 bcc_ptr += 2 * length;  /* convert num 16 bit words to bytes */
3114                 bcc_ptr += 2;   /* skip trailing null */
3115         } else {                /* ASCII */
3116                 strcpy(bcc_ptr, tree);
3117                 bcc_ptr += strlen(tree) + 1;
3118         }
3119         strcpy(bcc_ptr, "?????");
3120         bcc_ptr += strlen("?????");
3121         bcc_ptr += 1;
3122         count = bcc_ptr - &pSMB->Password[0];
3123         pSMB->hdr.smb_buf_length += count;
3124         pSMB->ByteCount = cpu_to_le16(count);
3125
3126         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, 0);
3127
3128         /* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
3129         /* above now done in SendReceive */
3130         if ((rc == 0) && (tcon != NULL)) {
3131                 tcon->tidStatus = CifsGood;
3132                 tcon->tid = smb_buffer_response->Tid;
3133                 bcc_ptr = pByteArea(smb_buffer_response);
3134                 length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
3135         /* skip service field (NB: this field is always ASCII) */
3136                 bcc_ptr += length + 1;
3137                 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3138                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3139                         length = UniStrnlen((wchar_t *) bcc_ptr, 512);
3140                         if ((bcc_ptr + (2 * length)) -
3141                              pByteArea(smb_buffer_response) <=
3142                             BCC(smb_buffer_response)) {
3143                                 kfree(tcon->nativeFileSystem);
3144                                 tcon->nativeFileSystem =
3145                                     kzalloc(length + 2, GFP_KERNEL);
3146                                 cifs_strfromUCS_le(tcon->nativeFileSystem,
3147                                                    (__le16 *) bcc_ptr,
3148                                                    length, nls_codepage);
3149                                 bcc_ptr += 2 * length;
3150                                 bcc_ptr[0] = 0; /* null terminate the string */
3151                                 bcc_ptr[1] = 0;
3152                                 bcc_ptr += 2;
3153                         }
3154                         /* else do not bother copying these informational fields */
3155                 } else {
3156                         length = strnlen(bcc_ptr, 1024);
3157                         if ((bcc_ptr + length) -
3158                             pByteArea(smb_buffer_response) <=
3159                             BCC(smb_buffer_response)) {
3160                                 kfree(tcon->nativeFileSystem);
3161                                 tcon->nativeFileSystem =
3162                                     kzalloc(length + 1, GFP_KERNEL);
3163                                 strncpy(tcon->nativeFileSystem, bcc_ptr,
3164                                         length);
3165                         }
3166                         /* else do not bother copying these informational fields */
3167                 }
3168                 if(smb_buffer_response->WordCount == 3)
3169                         tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3170                 else
3171                         tcon->Flags = 0;
3172                 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
3173         } else if ((rc == 0) && tcon == NULL) {
3174         /* all we need to save for IPC$ connection */
3175                 ses->ipc_tid = smb_buffer_response->Tid;
3176         }
3177
3178         if (smb_buffer)
3179                 cifs_buf_release(smb_buffer);
3180         return rc;
3181 }
3182
3183 int
3184 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3185 {
3186         int rc = 0;
3187         int xid;
3188         struct cifsSesInfo *ses = NULL;
3189         struct task_struct *cifsd_task;
3190
3191         xid = GetXid();
3192
3193         if (cifs_sb->tcon) {
3194                 ses = cifs_sb->tcon->ses; /* save ptr to ses before delete tcon!*/
3195                 rc = CIFSSMBTDis(xid, cifs_sb->tcon);
3196                 if (rc == -EBUSY) {
3197                         FreeXid(xid);
3198                         return 0;
3199                 }
3200                 tconInfoFree(cifs_sb->tcon);
3201                 if ((ses) && (ses->server)) {
3202                         /* save off task so we do not refer to ses later */
3203                         cifsd_task = ses->server->tsk;
3204                         cFYI(1, ("About to do SMBLogoff "));
3205                         rc = CIFSSMBLogoff(xid, ses);
3206                         if (rc == -EBUSY) {
3207                                 FreeXid(xid);
3208                                 return 0;
3209                         } else if (rc == -ESHUTDOWN) {
3210                                 cFYI(1,("Waking up socket by sending it signal"));
3211                                 if(cifsd_task) {
3212                                         send_sig(SIGKILL,cifsd_task,1);
3213                                         wait_for_completion(&cifsd_complete);
3214                                 }
3215                                 rc = 0;
3216                         } /* else - we have an smb session
3217                                 left on this socket do not kill cifsd */
3218                 } else
3219                         cFYI(1, ("No session or bad tcon"));
3220         }
3221
3222         cifs_sb->tcon = NULL;
3223         if (ses)
3224                 schedule_timeout_interruptible(msecs_to_jiffies(500));
3225         if (ses)
3226                 sesInfoFree(ses);
3227
3228         FreeXid(xid);
3229         return rc;              /* BB check if we should always return zero here */
3230 }
3231
3232 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3233                                            struct nls_table * nls_info)
3234 {
3235         int rc = 0;
3236         char ntlm_session_key[CIFS_SESS_KEY_SIZE];
3237         int ntlmv2_flag = FALSE;
3238         int first_time = 0;
3239
3240         /* what if server changes its buffer size after dropping the session? */
3241         if(pSesInfo->server->maxBuf == 0) /* no need to send on reconnect */ {
3242                 rc = CIFSSMBNegotiate(xid, pSesInfo);
3243                 if(rc == -EAGAIN) /* retry only once on 1st time connection */ {
3244                         rc = CIFSSMBNegotiate(xid, pSesInfo);
3245                         if(rc == -EAGAIN)
3246                                 rc = -EHOSTDOWN;
3247                 }
3248                 if(rc == 0) {
3249                         spin_lock(&GlobalMid_Lock);
3250                         if(pSesInfo->server->tcpStatus != CifsExiting)
3251                                 pSesInfo->server->tcpStatus = CifsGood;
3252                         else
3253                                 rc = -EHOSTDOWN;
3254                         spin_unlock(&GlobalMid_Lock);
3255
3256                 }
3257                 first_time = 1;
3258         }
3259         if (!rc) {
3260                 pSesInfo->capabilities = pSesInfo->server->capabilities;
3261                 if(linuxExtEnabled == 0)
3262                         pSesInfo->capabilities &= (~CAP_UNIX);
3263         /*      pSesInfo->sequence_number = 0;*/
3264                 cFYI(1,("Security Mode: 0x%x Capabilities: 0x%x Time Zone: %d",
3265                         pSesInfo->server->secMode,
3266                         pSesInfo->server->capabilities,
3267                         pSesInfo->server->timeZone));
3268                 if(experimEnabled < 2)
3269                         rc = CIFS_SessSetup(xid, pSesInfo,
3270                                             first_time, nls_info);
3271                 else if (extended_security
3272                                 && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3273                                 && (pSesInfo->server->secType == NTLMSSP)) {
3274                         rc = -EOPNOTSUPP;
3275                 } else if (extended_security
3276                            && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3277                            && (pSesInfo->server->secType == RawNTLMSSP)) {
3278                         cFYI(1, ("NTLMSSP sesssetup"));
3279                         rc = CIFSNTLMSSPNegotiateSessSetup(xid,
3280                                                 pSesInfo,
3281                                                 &ntlmv2_flag,
3282                                                 nls_info);
3283                         if (!rc) {
3284                                 if(ntlmv2_flag) {
3285                                         char * v2_response;
3286                                         cFYI(1,("Can use more secure NTLM version 2 password hash"));
3287                                         if(CalcNTLMv2_partial_mac_key(pSesInfo,
3288                                                 nls_info)) {
3289                                                 rc = -ENOMEM;
3290                                                 goto ss_err_exit;
3291                                         } else
3292                                                 v2_response = kmalloc(16 + 64 /* blob */, GFP_KERNEL);
3293                                         if(v2_response) {
3294                                                 CalcNTLMv2_response(pSesInfo,v2_response);
3295                                 /*              if(first_time)
3296                                                         cifs_calculate_ntlmv2_mac_key(
3297                                                           pSesInfo->server->mac_signing_key,
3298                                                           response, ntlm_session_key, */
3299                                                 kfree(v2_response);
3300                                         /* BB Put dummy sig in SessSetup PDU? */
3301                                         } else {
3302                                                 rc = -ENOMEM;
3303                                                 goto ss_err_exit;
3304                                         }
3305
3306                                 } else {
3307                                         SMBNTencrypt(pSesInfo->password,
3308                                                 pSesInfo->server->cryptKey,
3309                                                 ntlm_session_key);
3310
3311                                         if(first_time)
3312                                                 cifs_calculate_mac_key(
3313                                                         pSesInfo->server->mac_signing_key,
3314                                                         ntlm_session_key,
3315                                                         pSesInfo->password);
3316                                 }
3317                         /* for better security the weaker lanman hash not sent
3318                            in AuthSessSetup so we no longer calculate it */
3319
3320                                 rc = CIFSNTLMSSPAuthSessSetup(xid,
3321                                         pSesInfo,
3322                                         ntlm_session_key,
3323                                         ntlmv2_flag,
3324                                         nls_info);
3325                         }
3326                 } else { /* old style NTLM 0.12 session setup */
3327                         SMBNTencrypt(pSesInfo->password,
3328                                 pSesInfo->server->cryptKey,
3329                                 ntlm_session_key);
3330
3331                         if(first_time)
3332                                 cifs_calculate_mac_key(
3333                                         pSesInfo->server->mac_signing_key,
3334                                         ntlm_session_key, pSesInfo->password);
3335
3336                         rc = CIFSSessSetup(xid, pSesInfo,
3337                                 ntlm_session_key, nls_info);
3338                 }
3339                 if (rc) {
3340                         cERROR(1,("Send error in SessSetup = %d",rc));
3341                 } else {
3342                         cFYI(1,("CIFS Session Established successfully"));
3343                         pSesInfo->status = CifsGood;
3344                 }
3345         }
3346 ss_err_exit:
3347         return rc;
3348 }
3349