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, "sign",4) == 0) {
1177                         vol->secFlg |= CIFSSEC_MUST_SIGN;
1178 /*              } else if (strnicmp(data, "seal",4) == 0) {
1179                         vol->secFlg |= CIFSSEC_MUST_SEAL; */
1180                 } else if (strnicmp(data, "direct",6) == 0) {
1181                         vol->direct_io = 1;
1182                 } else if (strnicmp(data, "forcedirectio",13) == 0) {
1183                         vol->direct_io = 1;
1184                 } else if (strnicmp(data, "in6_addr",8) == 0) {
1185                         if (!value || !*value) {
1186                                 vol->in6_addr = NULL;
1187                         } else if (strnlen(value, 49) == 48) {
1188                                 vol->in6_addr = value;
1189                         } else {
1190                                 printk(KERN_WARNING "CIFS: ip v6 address not 48 characters long\n");
1191                                 return 1;
1192                         }
1193                 } else if (strnicmp(data, "noac", 4) == 0) {
1194                         printk(KERN_WARNING "CIFS: Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n");
1195                 } else
1196                         printk(KERN_WARNING "CIFS: Unknown mount option %s\n",data);
1197         }
1198         if (vol->UNC == NULL) {
1199                 if(devname == NULL) {
1200                         printk(KERN_WARNING "CIFS: Missing UNC name for mount target\n");
1201                         return 1;
1202                 }
1203                 if ((temp_len = strnlen(devname, 300)) < 300) {
1204                         vol->UNC = kmalloc(temp_len+1,GFP_KERNEL);
1205                         if(vol->UNC == NULL)
1206                                 return 1;
1207                         strcpy(vol->UNC,devname);
1208                         if (strncmp(vol->UNC, "//", 2) == 0) {
1209                                 vol->UNC[0] = '\\';
1210                                 vol->UNC[1] = '\\';
1211                         } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1212                                 printk(KERN_WARNING "CIFS: UNC Path does not begin with // or \\\\ \n");
1213                                 return 1;
1214                         }
1215                 } else {
1216                         printk(KERN_WARNING "CIFS: UNC name too long\n");
1217                         return 1;
1218                 }
1219         }
1220         if(vol->UNCip == NULL)
1221                 vol->UNCip = &vol->UNC[2];
1222
1223         return 0;
1224 }
1225
1226 static struct cifsSesInfo *
1227 cifs_find_tcp_session(struct in_addr * target_ip_addr,
1228                 struct in6_addr *target_ip6_addr,
1229                  char *userName, struct TCP_Server_Info **psrvTcp)
1230 {
1231         struct list_head *tmp;
1232         struct cifsSesInfo *ses;
1233         *psrvTcp = NULL;
1234         read_lock(&GlobalSMBSeslock);
1235
1236         list_for_each(tmp, &GlobalSMBSessionList) {
1237                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
1238                 if (ses->server) {
1239                         if((target_ip_addr &&
1240                                 (ses->server->addr.sockAddr.sin_addr.s_addr
1241                                   == target_ip_addr->s_addr)) || (target_ip6_addr
1242                                 && memcmp(&ses->server->addr.sockAddr6.sin6_addr,
1243                                         target_ip6_addr,sizeof(*target_ip6_addr)))){
1244                                 /* BB lock server and tcp session and increment use count here?? */
1245                                 *psrvTcp = ses->server; /* found a match on the TCP session */
1246                                 /* BB check if reconnection needed */
1247                                 if (strncmp
1248                                     (ses->userName, userName,
1249                                      MAX_USERNAME_SIZE) == 0){
1250                                         read_unlock(&GlobalSMBSeslock);
1251                                         return ses;     /* found exact match on both tcp and SMB sessions */
1252                                 }
1253                         }
1254                 }
1255                 /* else tcp and smb sessions need reconnection */
1256         }
1257         read_unlock(&GlobalSMBSeslock);
1258         return NULL;
1259 }
1260
1261 static struct cifsTconInfo *
1262 find_unc(__be32 new_target_ip_addr, char *uncName, char *userName)
1263 {
1264         struct list_head *tmp;
1265         struct cifsTconInfo *tcon;
1266
1267         read_lock(&GlobalSMBSeslock);
1268         list_for_each(tmp, &GlobalTreeConnectionList) {
1269                 cFYI(1, ("Next tcon - "));
1270                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
1271                 if (tcon->ses) {
1272                         if (tcon->ses->server) {
1273                                 cFYI(1,
1274                                      (" old ip addr: %x == new ip %x ?",
1275                                       tcon->ses->server->addr.sockAddr.sin_addr.
1276                                       s_addr, new_target_ip_addr));
1277                                 if (tcon->ses->server->addr.sockAddr.sin_addr.
1278                                     s_addr == new_target_ip_addr) {
1279         /* BB lock tcon and server and tcp session and increment use count here? */
1280                                         /* found a match on the TCP session */
1281                                         /* BB check if reconnection needed */
1282                                         cFYI(1,("Matched ip, old UNC: %s == new: %s ?",
1283                                               tcon->treeName, uncName));
1284                                         if (strncmp
1285                                             (tcon->treeName, uncName,
1286                                              MAX_TREE_SIZE) == 0) {
1287                                                 cFYI(1,
1288                                                      ("Matched UNC, old user: %s == new: %s ?",
1289                                                       tcon->treeName, uncName));
1290                                                 if (strncmp
1291                                                     (tcon->ses->userName,
1292                                                      userName,
1293                                                      MAX_USERNAME_SIZE) == 0) {
1294                                                         read_unlock(&GlobalSMBSeslock);
1295                                                         return tcon;/* also matched user (smb session)*/
1296                                                 }
1297                                         }
1298                                 }
1299                         }
1300                 }
1301         }
1302         read_unlock(&GlobalSMBSeslock);
1303         return NULL;
1304 }
1305
1306 int
1307 connect_to_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1308                     const char *old_path, const struct nls_table *nls_codepage,
1309                     int remap)
1310 {
1311         unsigned char *referrals = NULL;
1312         unsigned int num_referrals;
1313         int rc = 0;
1314
1315         rc = get_dfs_path(xid, pSesInfo,old_path, nls_codepage,
1316                         &num_referrals, &referrals, remap);
1317
1318         /* BB Add in code to: if valid refrl, if not ip address contact
1319                 the helper that resolves tcp names, mount to it, try to
1320                 tcon to it unmount it if fail */
1321
1322         kfree(referrals);
1323
1324         return rc;
1325 }
1326
1327 int
1328 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1329                         const char *old_path, const struct nls_table *nls_codepage,
1330                         unsigned int *pnum_referrals,
1331                         unsigned char ** preferrals, int remap)
1332 {
1333         char *temp_unc;
1334         int rc = 0;
1335
1336         *pnum_referrals = 0;
1337
1338         if (pSesInfo->ipc_tid == 0) {
1339                 temp_unc = kmalloc(2 /* for slashes */ +
1340                         strnlen(pSesInfo->serverName,SERVER_NAME_LEN_WITH_NULL * 2)
1341                                  + 1 + 4 /* slash IPC$ */  + 2,
1342                                 GFP_KERNEL);
1343                 if (temp_unc == NULL)
1344                         return -ENOMEM;
1345                 temp_unc[0] = '\\';
1346                 temp_unc[1] = '\\';
1347                 strcpy(temp_unc + 2, pSesInfo->serverName);
1348                 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1349                 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1350                 cFYI(1,
1351                      ("CIFS Tcon rc = %d ipc_tid = %d", rc,pSesInfo->ipc_tid));
1352                 kfree(temp_unc);
1353         }
1354         if (rc == 0)
1355                 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1356                                      pnum_referrals, nls_codepage, remap);
1357
1358         return rc;
1359 }
1360
1361 /* See RFC1001 section 14 on representation of Netbios names */
1362 static void rfc1002mangle(char * target,char * source, unsigned int length)
1363 {
1364         unsigned int i,j;
1365
1366         for(i=0,j=0;i<(length);i++) {
1367                 /* mask a nibble at a time and encode */
1368                 target[j] = 'A' + (0x0F & (source[i] >> 4));
1369                 target[j+1] = 'A' + (0x0F & source[i]);
1370                 j+=2;
1371         }
1372
1373 }
1374
1375
1376 static int
1377 ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
1378              char * netbios_name, char * target_name)
1379 {
1380         int rc = 0;
1381         int connected = 0;
1382         __be16 orig_port = 0;
1383
1384         if(*csocket == NULL) {
1385                 rc = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, csocket);
1386                 if (rc < 0) {
1387                         cERROR(1, ("Error %d creating socket",rc));
1388                         *csocket = NULL;
1389                         return rc;
1390                 } else {
1391                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1392                         cFYI(1,("Socket created"));
1393                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1394                 }
1395         }
1396
1397         psin_server->sin_family = AF_INET;
1398         if(psin_server->sin_port) { /* user overrode default port */
1399                 rc = (*csocket)->ops->connect(*csocket,
1400                                 (struct sockaddr *) psin_server,
1401                                 sizeof (struct sockaddr_in),0);
1402                 if (rc >= 0)
1403                         connected = 1;
1404         }
1405
1406         if(!connected) {
1407                 /* save original port so we can retry user specified port
1408                         later if fall back ports fail this time  */
1409                 orig_port = psin_server->sin_port;
1410
1411                 /* do not retry on the same port we just failed on */
1412                 if(psin_server->sin_port != htons(CIFS_PORT)) {
1413                         psin_server->sin_port = htons(CIFS_PORT);
1414
1415                         rc = (*csocket)->ops->connect(*csocket,
1416                                         (struct sockaddr *) psin_server,
1417                                         sizeof (struct sockaddr_in),0);
1418                         if (rc >= 0)
1419                                 connected = 1;
1420                 }
1421         }
1422         if (!connected) {
1423                 psin_server->sin_port = htons(RFC1001_PORT);
1424                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1425                                               psin_server, sizeof (struct sockaddr_in),0);
1426                 if (rc >= 0)
1427                         connected = 1;
1428         }
1429
1430         /* give up here - unless we want to retry on different
1431                 protocol families some day */
1432         if (!connected) {
1433                 if(orig_port)
1434                         psin_server->sin_port = orig_port;
1435                 cFYI(1,("Error %d connecting to server via ipv4",rc));
1436                 sock_release(*csocket);
1437                 *csocket = NULL;
1438                 return rc;
1439         }
1440         /* Eventually check for other socket options to change from
1441                 the default. sock_setsockopt not used because it expects
1442                 user space buffer */
1443          cFYI(1,("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",(*csocket)->sk->sk_sndbuf,
1444                  (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
1445         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1446         /* make the bufsizes depend on wsize/rsize and max requests */
1447         if((*csocket)->sk->sk_sndbuf < (200 * 1024))
1448                 (*csocket)->sk->sk_sndbuf = 200 * 1024;
1449         if((*csocket)->sk->sk_rcvbuf < (140 * 1024))
1450                 (*csocket)->sk->sk_rcvbuf = 140 * 1024;
1451
1452         /* send RFC1001 sessinit */
1453         if(psin_server->sin_port == htons(RFC1001_PORT)) {
1454                 /* some servers require RFC1001 sessinit before sending
1455                 negprot - BB check reconnection in case where second
1456                 sessinit is sent but no second negprot */
1457                 struct rfc1002_session_packet * ses_init_buf;
1458                 struct smb_hdr * smb_buf;
1459                 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), GFP_KERNEL);
1460                 if(ses_init_buf) {
1461                         ses_init_buf->trailer.session_req.called_len = 32;
1462                         if(target_name && (target_name[0] != 0)) {
1463                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1464                                         target_name, 16);
1465                         } else {
1466                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1467                                         DEFAULT_CIFS_CALLED_NAME,16);
1468                         }
1469
1470                         ses_init_buf->trailer.session_req.calling_len = 32;
1471                         /* calling name ends in null (byte 16) from old smb
1472                         convention. */
1473                         if(netbios_name && (netbios_name[0] !=0)) {
1474                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1475                                         netbios_name,16);
1476                         } else {
1477                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1478                                         "LINUX_CIFS_CLNT",16);
1479                         }
1480                         ses_init_buf->trailer.session_req.scope1 = 0;
1481                         ses_init_buf->trailer.session_req.scope2 = 0;
1482                         smb_buf = (struct smb_hdr *)ses_init_buf;
1483                         /* sizeof RFC1002_SESSION_REQUEST with no scope */
1484                         smb_buf->smb_buf_length = 0x81000044;
1485                         rc = smb_send(*csocket, smb_buf, 0x44,
1486                                 (struct sockaddr *)psin_server);
1487                         kfree(ses_init_buf);
1488                         msleep(1); /* RFC1001 layer in at least one server
1489                                       requires very short break before negprot
1490                                       presumably because not expecting negprot
1491                                       to follow so fast.  This is a simple
1492                                       solution that works without
1493                                       complicating the code and causes no
1494                                       significant slowing down on mount
1495                                       for everyone else */
1496                 }
1497                 /* else the negprot may still work without this
1498                 even though malloc failed */
1499
1500         }
1501
1502         return rc;
1503 }
1504
1505 static int
1506 ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
1507 {
1508         int rc = 0;
1509         int connected = 0;
1510         __be16 orig_port = 0;
1511
1512         if(*csocket == NULL) {
1513                 rc = sock_create_kern(PF_INET6, SOCK_STREAM, IPPROTO_TCP, csocket);
1514                 if (rc < 0) {
1515                         cERROR(1, ("Error %d creating ipv6 socket",rc));
1516                         *csocket = NULL;
1517                         return rc;
1518                 } else {
1519                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1520                          cFYI(1,("ipv6 Socket created"));
1521                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1522                 }
1523         }
1524
1525         psin_server->sin6_family = AF_INET6;
1526
1527         if(psin_server->sin6_port) { /* user overrode default port */
1528                 rc = (*csocket)->ops->connect(*csocket,
1529                                 (struct sockaddr *) psin_server,
1530                                 sizeof (struct sockaddr_in6),0);
1531                 if (rc >= 0)
1532                         connected = 1;
1533         }
1534
1535         if(!connected) {
1536                 /* save original port so we can retry user specified port
1537                         later if fall back ports fail this time  */
1538
1539                 orig_port = psin_server->sin6_port;
1540                 /* do not retry on the same port we just failed on */
1541                 if(psin_server->sin6_port != htons(CIFS_PORT)) {
1542                         psin_server->sin6_port = htons(CIFS_PORT);
1543
1544                         rc = (*csocket)->ops->connect(*csocket,
1545                                         (struct sockaddr *) psin_server,
1546                                         sizeof (struct sockaddr_in6),0);
1547                         if (rc >= 0)
1548                                 connected = 1;
1549                 }
1550         }
1551         if (!connected) {
1552                 psin_server->sin6_port = htons(RFC1001_PORT);
1553                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1554                                          psin_server, sizeof (struct sockaddr_in6),0);
1555                 if (rc >= 0)
1556                         connected = 1;
1557         }
1558
1559         /* give up here - unless we want to retry on different
1560                 protocol families some day */
1561         if (!connected) {
1562                 if(orig_port)
1563                         psin_server->sin6_port = orig_port;
1564                 cFYI(1,("Error %d connecting to server via ipv6",rc));
1565                 sock_release(*csocket);
1566                 *csocket = NULL;
1567                 return rc;
1568         }
1569         /* Eventually check for other socket options to change from
1570                 the default. sock_setsockopt not used because it expects
1571                 user space buffer */
1572         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1573
1574         return rc;
1575 }
1576
1577 int
1578 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
1579            char *mount_data, const char *devname)
1580 {
1581         int rc = 0;
1582         int xid;
1583         int address_type = AF_INET;
1584         struct socket *csocket = NULL;
1585         struct sockaddr_in sin_server;
1586         struct sockaddr_in6 sin_server6;
1587         struct smb_vol volume_info;
1588         struct cifsSesInfo *pSesInfo = NULL;
1589         struct cifsSesInfo *existingCifsSes = NULL;
1590         struct cifsTconInfo *tcon = NULL;
1591         struct TCP_Server_Info *srvTcp = NULL;
1592
1593         xid = GetXid();
1594
1595 /* cFYI(1, ("Entering cifs_mount. Xid: %d with: %s", xid, mount_data)); */
1596
1597         memset(&volume_info,0,sizeof(struct smb_vol));
1598         if (cifs_parse_mount_options(mount_data, devname, &volume_info)) {
1599                 kfree(volume_info.UNC);
1600                 kfree(volume_info.password);
1601                 FreeXid(xid);
1602                 return -EINVAL;
1603         }
1604
1605         if (volume_info.username) {
1606                 /* BB fixme parse for domain name here */
1607                 cFYI(1, ("Username: %s ", volume_info.username));
1608
1609         } else {
1610                 cifserror("No username specified");
1611         /* In userspace mount helper we can get user name from alternate
1612            locations such as env variables and files on disk */
1613                 kfree(volume_info.UNC);
1614                 kfree(volume_info.password);
1615                 FreeXid(xid);
1616                 return -EINVAL;
1617         }
1618
1619         if (volume_info.UNCip && volume_info.UNC) {
1620                 rc = cifs_inet_pton(AF_INET, volume_info.UNCip,&sin_server.sin_addr.s_addr);
1621
1622                 if(rc <= 0) {
1623                         /* not ipv4 address, try ipv6 */
1624                         rc = cifs_inet_pton(AF_INET6,volume_info.UNCip,&sin_server6.sin6_addr.in6_u);
1625                         if(rc > 0)
1626                                 address_type = AF_INET6;
1627                 } else {
1628                         address_type = AF_INET;
1629                 }
1630
1631                 if(rc <= 0) {
1632                         /* we failed translating address */
1633                         kfree(volume_info.UNC);
1634                         kfree(volume_info.password);
1635                         FreeXid(xid);
1636                         return -EINVAL;
1637                 }
1638
1639                 cFYI(1, ("UNC: %s ip: %s", volume_info.UNC, volume_info.UNCip));
1640                 /* success */
1641                 rc = 0;
1642         } else if (volume_info.UNCip){
1643                 /* BB using ip addr as server name connect to the DFS root below */
1644                 cERROR(1,("Connecting to DFS root not implemented yet"));
1645                 kfree(volume_info.UNC);
1646                 kfree(volume_info.password);
1647                 FreeXid(xid);
1648                 return -EINVAL;
1649         } else /* which servers DFS root would we conect to */ {
1650                 cERROR(1,
1651                        ("CIFS mount error: No UNC path (e.g. -o unc=//192.168.1.100/public) specified"));
1652                 kfree(volume_info.UNC);
1653                 kfree(volume_info.password);
1654                 FreeXid(xid);
1655                 return -EINVAL;
1656         }
1657
1658         /* this is needed for ASCII cp to Unicode converts */
1659         if(volume_info.iocharset == NULL) {
1660                 cifs_sb->local_nls = load_nls_default();
1661         /* load_nls_default can not return null */
1662         } else {
1663                 cifs_sb->local_nls = load_nls(volume_info.iocharset);
1664                 if(cifs_sb->local_nls == NULL) {
1665                         cERROR(1,("CIFS mount error: iocharset %s not found",volume_info.iocharset));
1666                         kfree(volume_info.UNC);
1667                         kfree(volume_info.password);
1668                         FreeXid(xid);
1669                         return -ELIBACC;
1670                 }
1671         }
1672
1673         if(address_type == AF_INET)
1674                 existingCifsSes = cifs_find_tcp_session(&sin_server.sin_addr,
1675                         NULL /* no ipv6 addr */,
1676                         volume_info.username, &srvTcp);
1677         else if(address_type == AF_INET6)
1678                 existingCifsSes = cifs_find_tcp_session(NULL /* no ipv4 addr */,
1679                         &sin_server6.sin6_addr,
1680                         volume_info.username, &srvTcp);
1681         else {
1682                 kfree(volume_info.UNC);
1683                 kfree(volume_info.password);
1684                 FreeXid(xid);
1685                 return -EINVAL;
1686         }
1687
1688
1689         if (srvTcp) {
1690                 cFYI(1, ("Existing tcp session with server found"));
1691         } else {        /* create socket */
1692                 if(volume_info.port)
1693                         sin_server.sin_port = htons(volume_info.port);
1694                 else
1695                         sin_server.sin_port = 0;
1696                 rc = ipv4_connect(&sin_server,&csocket,
1697                                   volume_info.source_rfc1001_name,
1698                                   volume_info.target_rfc1001_name);
1699                 if (rc < 0) {
1700                         cERROR(1,
1701                                ("Error connecting to IPv4 socket. Aborting operation"));
1702                         if(csocket != NULL)
1703                                 sock_release(csocket);
1704                         kfree(volume_info.UNC);
1705                         kfree(volume_info.password);
1706                         FreeXid(xid);
1707                         return rc;
1708                 }
1709
1710                 srvTcp = kmalloc(sizeof (struct TCP_Server_Info), GFP_KERNEL);
1711                 if (srvTcp == NULL) {
1712                         rc = -ENOMEM;
1713                         sock_release(csocket);
1714                         kfree(volume_info.UNC);
1715                         kfree(volume_info.password);
1716                         FreeXid(xid);
1717                         return rc;
1718                 } else {
1719                         memset(srvTcp, 0, sizeof (struct TCP_Server_Info));
1720                         memcpy(&srvTcp->addr.sockAddr, &sin_server, sizeof (struct sockaddr_in));
1721                         atomic_set(&srvTcp->inFlight,0);
1722                         /* BB Add code for ipv6 case too */
1723                         srvTcp->ssocket = csocket;
1724                         srvTcp->protocolType = IPV4;
1725                         init_waitqueue_head(&srvTcp->response_q);
1726                         init_waitqueue_head(&srvTcp->request_q);
1727                         INIT_LIST_HEAD(&srvTcp->pending_mid_q);
1728                         /* at this point we are the only ones with the pointer
1729                         to the struct since the kernel thread not created yet
1730                         so no need to spinlock this init of tcpStatus */
1731                         srvTcp->tcpStatus = CifsNew;
1732                         init_MUTEX(&srvTcp->tcpSem);
1733                         rc = (int)kernel_thread((void *)(void *)cifs_demultiplex_thread, srvTcp,
1734                                       CLONE_FS | CLONE_FILES | CLONE_VM);
1735                         if(rc < 0) {
1736                                 rc = -ENOMEM;
1737                                 sock_release(csocket);
1738                                 kfree(volume_info.UNC);
1739                                 kfree(volume_info.password);
1740                                 FreeXid(xid);
1741                                 return rc;
1742                         }
1743                         wait_for_completion(&cifsd_complete);
1744                         rc = 0;
1745                         memcpy(srvTcp->workstation_RFC1001_name, volume_info.source_rfc1001_name,16);
1746                         memcpy(srvTcp->server_RFC1001_name, volume_info.target_rfc1001_name,16);
1747                         srvTcp->sequence_number = 0;
1748                 }
1749         }
1750
1751         if (existingCifsSes) {
1752                 pSesInfo = existingCifsSes;
1753                 cFYI(1, ("Existing smb sess found"));
1754                 kfree(volume_info.password);
1755                 /* volume_info.UNC freed at end of function */
1756         } else if (!rc) {
1757                 cFYI(1, ("Existing smb sess not found"));
1758                 pSesInfo = sesInfoAlloc();
1759                 if (pSesInfo == NULL)
1760                         rc = -ENOMEM;
1761                 else {
1762                         pSesInfo->server = srvTcp;
1763                         sprintf(pSesInfo->serverName, "%u.%u.%u.%u",
1764                                 NIPQUAD(sin_server.sin_addr.s_addr));
1765                 }
1766
1767                 if (!rc){
1768                         /* volume_info.password freed at unmount */
1769                         if (volume_info.password)
1770                                 pSesInfo->password = volume_info.password;
1771                         if (volume_info.username)
1772                                 strncpy(pSesInfo->userName,
1773                                         volume_info.username,MAX_USERNAME_SIZE);
1774                         if (volume_info.domainname) {
1775                                 int len = strlen(volume_info.domainname);
1776                                 pSesInfo->domainName =
1777                                         kmalloc(len + 1, GFP_KERNEL);
1778                                 if(pSesInfo->domainName)
1779                                         strcpy(pSesInfo->domainName,
1780                                                 volume_info.domainname);
1781                         }
1782                         pSesInfo->linux_uid = volume_info.linux_uid;
1783                         pSesInfo->overrideSecFlg = volume_info.secFlg;
1784                         down(&pSesInfo->sesSem);
1785                         /* BB FIXME need to pass vol->secFlgs BB */
1786                         rc = cifs_setup_session(xid,pSesInfo, cifs_sb->local_nls);
1787                         up(&pSesInfo->sesSem);
1788                         if(!rc)
1789                                 atomic_inc(&srvTcp->socketUseCount);
1790                 } else
1791                         kfree(volume_info.password);
1792         }
1793
1794         /* search for existing tcon to this server share */
1795         if (!rc) {
1796                 if(volume_info.rsize > CIFSMaxBufSize) {
1797                         cERROR(1,("rsize %d too large, using MaxBufSize",
1798                                 volume_info.rsize));
1799                         cifs_sb->rsize = CIFSMaxBufSize;
1800                 } else if((volume_info.rsize) && (volume_info.rsize <= CIFSMaxBufSize))
1801                         cifs_sb->rsize = volume_info.rsize;
1802                 else /* default */
1803                         cifs_sb->rsize = CIFSMaxBufSize;
1804
1805                 if(volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
1806                         cERROR(1,("wsize %d too large using 4096 instead",
1807                                   volume_info.wsize));
1808                         cifs_sb->wsize = 4096;
1809                 } else if(volume_info.wsize)
1810                         cifs_sb->wsize = volume_info.wsize;
1811                 else
1812                         cifs_sb->wsize =
1813                                 min_t(const int, PAGEVEC_SIZE * PAGE_CACHE_SIZE,
1814                                         127*1024);
1815                         /* old default of CIFSMaxBufSize was too small now
1816                            that SMB Write2 can send multiple pages in kvec.
1817                            RFC1001 does not describe what happens when frame
1818                            bigger than 128K is sent so use that as max in
1819                            conjunction with 52K kvec constraint on arch with 4K
1820                            page size  */
1821
1822                 if(cifs_sb->rsize < 2048) {
1823                         cifs_sb->rsize = 2048;
1824                         /* Windows ME may prefer this */
1825                         cFYI(1,("readsize set to minimum 2048"));
1826                 }
1827                 cifs_sb->mnt_uid = volume_info.linux_uid;
1828                 cifs_sb->mnt_gid = volume_info.linux_gid;
1829                 cifs_sb->mnt_file_mode = volume_info.file_mode;
1830                 cifs_sb->mnt_dir_mode = volume_info.dir_mode;
1831                 cFYI(1,("file mode: 0x%x  dir mode: 0x%x",
1832                         cifs_sb->mnt_file_mode,cifs_sb->mnt_dir_mode));
1833
1834                 if(volume_info.noperm)
1835                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
1836                 if(volume_info.setuids)
1837                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
1838                 if(volume_info.server_ino)
1839                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
1840                 if(volume_info.remap)
1841                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
1842                 if(volume_info.no_xattr)
1843                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
1844                 if(volume_info.sfu_emul)
1845                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
1846                 if(volume_info.nobrl)
1847                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
1848                 if(volume_info.cifs_acl)
1849                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
1850
1851                 if(volume_info.direct_io) {
1852                         cFYI(1,("mounting share using direct i/o"));
1853                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
1854                 }
1855
1856                 tcon =
1857                     find_unc(sin_server.sin_addr.s_addr, volume_info.UNC,
1858                              volume_info.username);
1859                 if (tcon) {
1860                         cFYI(1, ("Found match on UNC path"));
1861                         /* we can have only one retry value for a connection
1862                            to a share so for resources mounted more than once
1863                            to the same server share the last value passed in
1864                            for the retry flag is used */
1865                         tcon->retry = volume_info.retry;
1866                         tcon->nocase = volume_info.nocase;
1867                 } else {
1868                         tcon = tconInfoAlloc();
1869                         if (tcon == NULL)
1870                                 rc = -ENOMEM;
1871                         else {
1872                                 /* check for null share name ie connect to dfs root */
1873
1874                                 /* BB check if this works for exactly length three strings */
1875                                 if ((strchr(volume_info.UNC + 3, '\\') == NULL)
1876                                     && (strchr(volume_info.UNC + 3, '/') ==
1877                                         NULL)) {
1878                                         rc = connect_to_dfs_path(xid, pSesInfo,
1879                                                         "", cifs_sb->local_nls,
1880                                                         cifs_sb->mnt_cifs_flags &
1881                                                           CIFS_MOUNT_MAP_SPECIAL_CHR);
1882                                         kfree(volume_info.UNC);
1883                                         FreeXid(xid);
1884                                         return -ENODEV;
1885                                 } else {
1886                                         rc = CIFSTCon(xid, pSesInfo,
1887                                                 volume_info.UNC,
1888                                                 tcon, cifs_sb->local_nls);
1889                                         cFYI(1, ("CIFS Tcon rc = %d", rc));
1890                                 }
1891                                 if (!rc) {
1892                                         atomic_inc(&pSesInfo->inUse);
1893                                         tcon->retry = volume_info.retry;
1894                                         tcon->nocase = volume_info.nocase;
1895                                 }
1896                         }
1897                 }
1898         }
1899         if(pSesInfo) {
1900                 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
1901                         sb->s_maxbytes = (u64) 1 << 63;
1902                 } else
1903                         sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
1904         }
1905
1906         sb->s_time_gran = 100;
1907
1908 /* on error free sesinfo and tcon struct if needed */
1909         if (rc) {
1910                 /* if session setup failed, use count is zero but
1911                 we still need to free cifsd thread */
1912                 if(atomic_read(&srvTcp->socketUseCount) == 0) {
1913                         spin_lock(&GlobalMid_Lock);
1914                         srvTcp->tcpStatus = CifsExiting;
1915                         spin_unlock(&GlobalMid_Lock);
1916                         if(srvTcp->tsk) {
1917                                 send_sig(SIGKILL,srvTcp->tsk,1);
1918                                 wait_for_completion(&cifsd_complete);
1919                         }
1920                 }
1921                  /* If find_unc succeeded then rc == 0 so we can not end */
1922                 if (tcon)  /* up accidently freeing someone elses tcon struct */
1923                         tconInfoFree(tcon);
1924                 if (existingCifsSes == NULL) {
1925                         if (pSesInfo) {
1926                                 if ((pSesInfo->server) &&
1927                                     (pSesInfo->status == CifsGood)) {
1928                                         int temp_rc;
1929                                         temp_rc = CIFSSMBLogoff(xid, pSesInfo);
1930                                         /* if the socketUseCount is now zero */
1931                                         if((temp_rc == -ESHUTDOWN) &&
1932                                            (pSesInfo->server->tsk)) {
1933                                                 send_sig(SIGKILL,pSesInfo->server->tsk,1);
1934                                                 wait_for_completion(&cifsd_complete);
1935                                         }
1936                                 } else
1937                                         cFYI(1, ("No session or bad tcon"));
1938                                 sesInfoFree(pSesInfo);
1939                                 /* pSesInfo = NULL; */
1940                         }
1941                 }
1942         } else {
1943                 atomic_inc(&tcon->useCount);
1944                 cifs_sb->tcon = tcon;
1945                 tcon->ses = pSesInfo;
1946
1947                 /* do not care if following two calls succeed - informational */
1948                 CIFSSMBQFSDeviceInfo(xid, tcon);
1949                 CIFSSMBQFSAttributeInfo(xid, tcon);
1950
1951                 if (tcon->ses->capabilities & CAP_UNIX) {
1952                         if(!CIFSSMBQFSUnixInfo(xid, tcon)) {
1953                                 __u64 cap =
1954                                        le64_to_cpu(tcon->fsUnixInfo.Capability);
1955                                 cap &= CIFS_UNIX_CAP_MASK;
1956                                 if(volume_info.no_psx_acl)
1957                                         cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1958                                 else if(CIFS_UNIX_POSIX_ACL_CAP & cap) {
1959                                         cFYI(1,("negotiated posix acl support"));
1960                                         sb->s_flags |= MS_POSIXACL;
1961                                 }
1962
1963                                 if(volume_info.posix_paths == 0)
1964                                         cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1965                                 else if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
1966                                         cFYI(1,("negotiate posix pathnames"));
1967                                         cifs_sb->mnt_cifs_flags |=
1968                                                 CIFS_MOUNT_POSIX_PATHS;
1969                                 }
1970
1971                                 cFYI(1,("Negotiate caps 0x%x",(int)cap));
1972
1973                                 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
1974                                         cFYI(1,("setting capabilities failed"));
1975                                 }
1976                         }
1977                 }
1978                 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
1979                         cifs_sb->wsize = min(cifs_sb->wsize,
1980                                              (tcon->ses->server->maxBuf -
1981                                               MAX_CIFS_HDR_SIZE));
1982                 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
1983                         cifs_sb->rsize = min(cifs_sb->rsize,
1984                                              (tcon->ses->server->maxBuf -
1985                                               MAX_CIFS_HDR_SIZE));
1986         }
1987
1988         /* volume_info.password is freed above when existing session found
1989         (in which case it is not needed anymore) but when new sesion is created
1990         the password ptr is put in the new session structure (in which case the
1991         password will be freed at unmount time) */
1992         kfree(volume_info.UNC);
1993         FreeXid(xid);
1994         return rc;
1995 }
1996
1997 static int
1998 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
1999               char session_key[CIFS_SESS_KEY_SIZE],
2000               const struct nls_table *nls_codepage)
2001 {
2002         struct smb_hdr *smb_buffer;
2003         struct smb_hdr *smb_buffer_response;
2004         SESSION_SETUP_ANDX *pSMB;
2005         SESSION_SETUP_ANDX *pSMBr;
2006         char *bcc_ptr;
2007         char *user;
2008         char *domain;
2009         int rc = 0;
2010         int remaining_words = 0;
2011         int bytes_returned = 0;
2012         int len;
2013         __u32 capabilities;
2014         __u16 count;
2015
2016         cFYI(1, ("In sesssetup"));
2017         if(ses == NULL)
2018                 return -EINVAL;
2019         user = ses->userName;
2020         domain = ses->domainName;
2021         smb_buffer = cifs_buf_get();
2022         if (smb_buffer == NULL) {
2023                 return -ENOMEM;
2024         }
2025         smb_buffer_response = smb_buffer;
2026         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2027
2028         /* send SMBsessionSetup here */
2029         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2030                         NULL /* no tCon exists yet */ , 13 /* wct */ );
2031
2032         smb_buffer->Mid = GetNextMid(ses->server);
2033         pSMB->req_no_secext.AndXCommand = 0xFF;
2034         pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2035         pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2036
2037         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2038                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2039
2040         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2041                 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2042         if (ses->capabilities & CAP_UNICODE) {
2043                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2044                 capabilities |= CAP_UNICODE;
2045         }
2046         if (ses->capabilities & CAP_STATUS32) {
2047                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2048                 capabilities |= CAP_STATUS32;
2049         }
2050         if (ses->capabilities & CAP_DFS) {
2051                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2052                 capabilities |= CAP_DFS;
2053         }
2054         pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2055
2056         pSMB->req_no_secext.CaseInsensitivePasswordLength =
2057                 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2058
2059         pSMB->req_no_secext.CaseSensitivePasswordLength =
2060             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2061         bcc_ptr = pByteArea(smb_buffer);
2062         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2063         bcc_ptr += CIFS_SESS_KEY_SIZE;
2064         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2065         bcc_ptr += CIFS_SESS_KEY_SIZE;
2066
2067         if (ses->capabilities & CAP_UNICODE) {
2068                 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2069                         *bcc_ptr = 0;
2070                         bcc_ptr++;
2071                 }
2072                 if(user == NULL)
2073                         bytes_returned = 0; /* skip null user */
2074                 else
2075                         bytes_returned =
2076                                 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2077                                         nls_codepage);
2078                 /* convert number of 16 bit words to bytes */
2079                 bcc_ptr += 2 * bytes_returned;
2080                 bcc_ptr += 2;   /* trailing null */
2081                 if (domain == NULL)
2082                         bytes_returned =
2083                             cifs_strtoUCS((__le16 *) bcc_ptr,
2084                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2085                 else
2086                         bytes_returned =
2087                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2088                                           nls_codepage);
2089                 bcc_ptr += 2 * bytes_returned;
2090                 bcc_ptr += 2;
2091                 bytes_returned =
2092                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2093                                   32, nls_codepage);
2094                 bcc_ptr += 2 * bytes_returned;
2095                 bytes_returned =
2096                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release,
2097                                   32, nls_codepage);
2098                 bcc_ptr += 2 * bytes_returned;
2099                 bcc_ptr += 2;
2100                 bytes_returned =
2101                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2102                                   64, nls_codepage);
2103                 bcc_ptr += 2 * bytes_returned;
2104                 bcc_ptr += 2;
2105         } else {
2106                 if(user != NULL) {
2107                     strncpy(bcc_ptr, user, 200);
2108                     bcc_ptr += strnlen(user, 200);
2109                 }
2110                 *bcc_ptr = 0;
2111                 bcc_ptr++;
2112                 if (domain == NULL) {
2113                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2114                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2115                 } else {
2116                         strncpy(bcc_ptr, domain, 64);
2117                         bcc_ptr += strnlen(domain, 64);
2118                         *bcc_ptr = 0;
2119                         bcc_ptr++;
2120                 }
2121                 strcpy(bcc_ptr, "Linux version ");
2122                 bcc_ptr += strlen("Linux version ");
2123                 strcpy(bcc_ptr, system_utsname.release);
2124                 bcc_ptr += strlen(system_utsname.release) + 1;
2125                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2126                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2127         }
2128         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2129         smb_buffer->smb_buf_length += count;
2130         pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2131
2132         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2133                          &bytes_returned, 1);
2134         if (rc) {
2135 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2136         } else if ((smb_buffer_response->WordCount == 3)
2137                    || (smb_buffer_response->WordCount == 4)) {
2138                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2139                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2140                 if (action & GUEST_LOGIN)
2141                         cFYI(1, (" Guest login"));      /* do we want to mark SesInfo struct ? */
2142                 ses->Suid = smb_buffer_response->Uid;   /* UID left in wire format (le) */
2143                 cFYI(1, ("UID = %d ", ses->Suid));
2144          /* response can have either 3 or 4 word count - Samba sends 3 */
2145                 bcc_ptr = pByteArea(smb_buffer_response);
2146                 if ((pSMBr->resp.hdr.WordCount == 3)
2147                     || ((pSMBr->resp.hdr.WordCount == 4)
2148                         && (blob_len < pSMBr->resp.ByteCount))) {
2149                         if (pSMBr->resp.hdr.WordCount == 4)
2150                                 bcc_ptr += blob_len;
2151
2152                         if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2153                                 if ((long) (bcc_ptr) % 2) {
2154                                         remaining_words =
2155                                             (BCC(smb_buffer_response) - 1) /2;
2156                                         bcc_ptr++;      /* Unicode strings must be word aligned */
2157                                 } else {
2158                                         remaining_words =
2159                                                 BCC(smb_buffer_response) / 2;
2160                                 }
2161                                 len =
2162                                     UniStrnlen((wchar_t *) bcc_ptr,
2163                                                remaining_words - 1);
2164 /* We look for obvious messed up bcc or strings in response so we do not go off
2165    the end since (at least) WIN2K and Windows XP have a major bug in not null
2166    terminating last Unicode string in response  */
2167                                 if(ses->serverOS)
2168                                         kfree(ses->serverOS);
2169                                 ses->serverOS = kzalloc(2 * (len + 1), GFP_KERNEL);
2170                                 if(ses->serverOS == NULL)
2171                                         goto sesssetup_nomem;
2172                                 cifs_strfromUCS_le(ses->serverOS,
2173                                            (__le16 *)bcc_ptr, len,nls_codepage);
2174                                 bcc_ptr += 2 * (len + 1);
2175                                 remaining_words -= len + 1;
2176                                 ses->serverOS[2 * len] = 0;
2177                                 ses->serverOS[1 + (2 * len)] = 0;
2178                                 if (remaining_words > 0) {
2179                                         len = UniStrnlen((wchar_t *)bcc_ptr,
2180                                                          remaining_words-1);
2181                                         kfree(ses->serverNOS);
2182                                         ses->serverNOS = kzalloc(2 * (len + 1),GFP_KERNEL);
2183                                         if(ses->serverNOS == NULL)
2184                                                 goto sesssetup_nomem;
2185                                         cifs_strfromUCS_le(ses->serverNOS,
2186                                                            (__le16 *)bcc_ptr,len,nls_codepage);
2187                                         bcc_ptr += 2 * (len + 1);
2188                                         ses->serverNOS[2 * len] = 0;
2189                                         ses->serverNOS[1 + (2 * len)] = 0;
2190                                         if(strncmp(ses->serverNOS,
2191                                                 "NT LAN Manager 4",16) == 0) {
2192                                                 cFYI(1,("NT4 server"));
2193                                                 ses->flags |= CIFS_SES_NT4;
2194                                         }
2195                                         remaining_words -= len + 1;
2196                                         if (remaining_words > 0) {
2197                                                 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2198           /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2199                                                 if(ses->serverDomain)
2200                                                         kfree(ses->serverDomain);
2201                                                 ses->serverDomain =
2202                                                     kzalloc(2*(len+1),GFP_KERNEL);
2203                                                 if(ses->serverDomain == NULL)
2204                                                         goto sesssetup_nomem;
2205                                                 cifs_strfromUCS_le(ses->serverDomain,
2206                                                      (__le16 *)bcc_ptr,len,nls_codepage);
2207                                                 bcc_ptr += 2 * (len + 1);
2208                                                 ses->serverDomain[2*len] = 0;
2209                                                 ses->serverDomain[1+(2*len)] = 0;
2210                                         } /* else no more room so create dummy domain string */
2211                                         else {
2212                                                 if(ses->serverDomain)
2213                                                         kfree(ses->serverDomain);
2214                                                 ses->serverDomain =
2215                                                         kzalloc(2, GFP_KERNEL);
2216                                         }
2217                                 } else {        /* no room so create dummy domain and NOS string */
2218                                         /* if these kcallocs fail not much we
2219                                            can do, but better to not fail the
2220                                            sesssetup itself */
2221                                         kfree(ses->serverDomain);
2222                                         ses->serverDomain =
2223                                             kzalloc(2, GFP_KERNEL);
2224                                         kfree(ses->serverNOS);
2225                                         ses->serverNOS =
2226                                             kzalloc(2, GFP_KERNEL);
2227                                 }
2228                         } else {        /* ASCII */
2229                                 len = strnlen(bcc_ptr, 1024);
2230                                 if (((long) bcc_ptr + len) - (long)
2231                                     pByteArea(smb_buffer_response)
2232                                             <= BCC(smb_buffer_response)) {
2233                                         kfree(ses->serverOS);
2234                                         ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
2235                                         if(ses->serverOS == NULL)
2236                                                 goto sesssetup_nomem;
2237                                         strncpy(ses->serverOS,bcc_ptr, len);
2238
2239                                         bcc_ptr += len;
2240                                         bcc_ptr[0] = 0; /* null terminate the string */
2241                                         bcc_ptr++;
2242
2243                                         len = strnlen(bcc_ptr, 1024);
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                                                 kfree(ses->serverNOS);
2512                                                 ses->serverNOS =
2513                                                     kzalloc(2 * (len + 1),
2514                                                             GFP_KERNEL);
2515                                                 cifs_strfromUCS_le(ses->
2516                                                                    serverNOS,
2517                                                                    (__le16 *)
2518                                                                    bcc_ptr,
2519                                                                    len,
2520                                                                    nls_codepage);
2521                                                 bcc_ptr += 2 * (len + 1);
2522                                                 ses->serverNOS[2 * len] = 0;
2523                                                 ses->serverNOS[1 +
2524                                                                (2 * len)] = 0;
2525                                                 remaining_words -= len + 1;
2526                                                 if (remaining_words > 0) {
2527                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2528            /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2529                                                         kfree(ses->serverDomain);
2530                                                         ses->serverDomain =
2531                                                             kzalloc(2 *
2532                                                                     (len +
2533                                                                      1),
2534                                                                     GFP_KERNEL);
2535                                                         cifs_strfromUCS_le
2536                                                             (ses->serverDomain,
2537                                                              (__le16 *)bcc_ptr,
2538                                                              len, nls_codepage);
2539                                                         bcc_ptr +=
2540                                                             2 * (len + 1);
2541                                                         ses->serverDomain[2*len]
2542                                                             = 0;
2543                                                         ses->serverDomain
2544                                                                 [1 + (2 * len)]
2545                                                             = 0;
2546                                                 } /* else no more room so create dummy domain string */
2547                                                 else {
2548                                                         kfree(ses->serverDomain);
2549                                                         ses->serverDomain =
2550                                                             kzalloc(2,
2551                                                                     GFP_KERNEL);
2552                                                 }
2553                                         } else {        /* no room so create dummy domain and NOS string */
2554                                                 kfree(ses->serverDomain);
2555                                                 ses->serverDomain =
2556                                                     kzalloc(2, GFP_KERNEL);
2557                                                 kfree(ses->serverNOS);
2558                                                 ses->serverNOS =
2559                                                     kzalloc(2, GFP_KERNEL);
2560                                         }
2561                                 } else {        /* ASCII */
2562                                         len = strnlen(bcc_ptr, 1024);
2563                                         if (((long) bcc_ptr + len) - (long)
2564                                             pByteArea(smb_buffer_response)
2565                                             <= BCC(smb_buffer_response)) {
2566                                                 if(ses->serverOS)
2567                                                         kfree(ses->serverOS);
2568                                                 ses->serverOS =
2569                                                     kzalloc(len + 1,
2570                                                             GFP_KERNEL);
2571                                                 strncpy(ses->serverOS,
2572                                                         bcc_ptr, len);
2573
2574                                                 bcc_ptr += len;
2575                                                 bcc_ptr[0] = 0; /* null terminate string */
2576                                                 bcc_ptr++;
2577
2578                                                 len = strnlen(bcc_ptr, 1024);
2579                                                 kfree(ses->serverNOS);
2580                                                 ses->serverNOS =
2581                                                     kzalloc(len + 1,
2582                                                             GFP_KERNEL);
2583                                                 strncpy(ses->serverNOS, bcc_ptr, len);
2584                                                 bcc_ptr += len;
2585                                                 bcc_ptr[0] = 0;
2586                                                 bcc_ptr++;
2587
2588                                                 len = strnlen(bcc_ptr, 1024);
2589                                                 kfree(ses->serverDomain);
2590                                                 ses->serverDomain =
2591                                                     kzalloc(len + 1,
2592                                                             GFP_KERNEL);
2593                                                 strncpy(ses->serverDomain, bcc_ptr, len);
2594                                                 bcc_ptr += len;
2595                                                 bcc_ptr[0] = 0;
2596                                                 bcc_ptr++;
2597                                         } else
2598                                                 cFYI(1,
2599                                                      ("Variable field of length %d extends beyond end of smb",
2600                                                       len));
2601                                 }
2602                         } else {
2603                                 cERROR(1,
2604                                        (" Security Blob Length extends beyond end of SMB"));
2605                         }
2606                 } else {
2607                         cERROR(1, ("No session structure passed in."));
2608                 }
2609         } else {
2610                 cERROR(1,
2611                        (" Invalid Word count %d:",
2612                         smb_buffer_response->WordCount));
2613                 rc = -EIO;
2614         }
2615
2616         if (smb_buffer)
2617                 cifs_buf_release(smb_buffer);
2618
2619         return rc;
2620 }
2621 static int
2622 CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2623                 char *ntlm_session_key, int ntlmv2_flag,
2624                 const struct nls_table *nls_codepage)
2625 {
2626         struct smb_hdr *smb_buffer;
2627         struct smb_hdr *smb_buffer_response;
2628         SESSION_SETUP_ANDX *pSMB;
2629         SESSION_SETUP_ANDX *pSMBr;
2630         char *bcc_ptr;
2631         char *user;
2632         char *domain;
2633         int rc = 0;
2634         int remaining_words = 0;
2635         int bytes_returned = 0;
2636         int len;
2637         int SecurityBlobLength = sizeof (AUTHENTICATE_MESSAGE);
2638         PAUTHENTICATE_MESSAGE SecurityBlob;
2639         __u32 negotiate_flags, capabilities;
2640         __u16 count;
2641
2642         cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
2643         if(ses == NULL)
2644                 return -EINVAL;
2645         user = ses->userName;
2646         domain = ses->domainName;
2647         smb_buffer = cifs_buf_get();
2648         if (smb_buffer == NULL) {
2649                 return -ENOMEM;
2650         }
2651         smb_buffer_response = smb_buffer;
2652         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2653         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2654
2655         /* send SMBsessionSetup here */
2656         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2657                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2658
2659         smb_buffer->Mid = GetNextMid(ses->server);
2660         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2661         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2662         pSMB->req.AndXCommand = 0xFF;
2663         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2664         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2665
2666         pSMB->req.hdr.Uid = ses->Suid;
2667
2668         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2669                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2670
2671         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2672             CAP_EXTENDED_SECURITY;
2673         if (ses->capabilities & CAP_UNICODE) {
2674                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2675                 capabilities |= CAP_UNICODE;
2676         }
2677         if (ses->capabilities & CAP_STATUS32) {
2678                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2679                 capabilities |= CAP_STATUS32;
2680         }
2681         if (ses->capabilities & CAP_DFS) {
2682                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2683                 capabilities |= CAP_DFS;
2684         }
2685         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2686
2687         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2688         SecurityBlob = (PAUTHENTICATE_MESSAGE) bcc_ptr;
2689         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2690         SecurityBlob->MessageType = NtLmAuthenticate;
2691         bcc_ptr += SecurityBlobLength;
2692         negotiate_flags =
2693             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
2694             NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
2695             0x80000000 | NTLMSSP_NEGOTIATE_128;
2696         if(sign_CIFS_PDUs)
2697                 negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
2698         if(ntlmv2_flag)
2699                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
2700
2701 /* setup pointers to domain name and workstation name */
2702
2703         SecurityBlob->WorkstationName.Buffer = 0;
2704         SecurityBlob->WorkstationName.Length = 0;
2705         SecurityBlob->WorkstationName.MaximumLength = 0;
2706         SecurityBlob->SessionKey.Length = 0;
2707         SecurityBlob->SessionKey.MaximumLength = 0;
2708         SecurityBlob->SessionKey.Buffer = 0;
2709
2710         SecurityBlob->LmChallengeResponse.Length = 0;
2711         SecurityBlob->LmChallengeResponse.MaximumLength = 0;
2712         SecurityBlob->LmChallengeResponse.Buffer = 0;
2713
2714         SecurityBlob->NtChallengeResponse.Length =
2715             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2716         SecurityBlob->NtChallengeResponse.MaximumLength =
2717             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2718         memcpy(bcc_ptr, ntlm_session_key, CIFS_SESS_KEY_SIZE);
2719         SecurityBlob->NtChallengeResponse.Buffer =
2720             cpu_to_le32(SecurityBlobLength);
2721         SecurityBlobLength += CIFS_SESS_KEY_SIZE;
2722         bcc_ptr += CIFS_SESS_KEY_SIZE;
2723
2724         if (ses->capabilities & CAP_UNICODE) {
2725                 if (domain == NULL) {
2726                         SecurityBlob->DomainName.Buffer = 0;
2727                         SecurityBlob->DomainName.Length = 0;
2728                         SecurityBlob->DomainName.MaximumLength = 0;
2729                 } else {
2730                         __u16 len =
2731                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2732                                           nls_codepage);
2733                         len *= 2;
2734                         SecurityBlob->DomainName.MaximumLength =
2735                             cpu_to_le16(len);
2736                         SecurityBlob->DomainName.Buffer =
2737                             cpu_to_le32(SecurityBlobLength);
2738                         bcc_ptr += len;
2739                         SecurityBlobLength += len;
2740                         SecurityBlob->DomainName.Length =
2741                             cpu_to_le16(len);
2742                 }
2743                 if (user == NULL) {
2744                         SecurityBlob->UserName.Buffer = 0;
2745                         SecurityBlob->UserName.Length = 0;
2746                         SecurityBlob->UserName.MaximumLength = 0;
2747                 } else {
2748                         __u16 len =
2749                             cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
2750                                           nls_codepage);
2751                         len *= 2;
2752                         SecurityBlob->UserName.MaximumLength =
2753                             cpu_to_le16(len);
2754                         SecurityBlob->UserName.Buffer =
2755                             cpu_to_le32(SecurityBlobLength);
2756                         bcc_ptr += len;
2757                         SecurityBlobLength += len;
2758                         SecurityBlob->UserName.Length =
2759                             cpu_to_le16(len);
2760                 }
2761
2762                 /* SecurityBlob->WorkstationName.Length = cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
2763                    SecurityBlob->WorkstationName.Length *= 2;
2764                    SecurityBlob->WorkstationName.MaximumLength = cpu_to_le16(SecurityBlob->WorkstationName.Length);
2765                    SecurityBlob->WorkstationName.Buffer = cpu_to_le32(SecurityBlobLength);
2766                    bcc_ptr += SecurityBlob->WorkstationName.Length;
2767                    SecurityBlobLength += SecurityBlob->WorkstationName.Length;
2768                    SecurityBlob->WorkstationName.Length = cpu_to_le16(SecurityBlob->WorkstationName.Length);  */
2769
2770                 if ((long) bcc_ptr % 2) {
2771                         *bcc_ptr = 0;
2772                         bcc_ptr++;
2773                 }
2774                 bytes_returned =
2775                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2776                                   32, nls_codepage);
2777                 bcc_ptr += 2 * bytes_returned;
2778                 bytes_returned =
2779                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release, 32,
2780                                   nls_codepage);
2781                 bcc_ptr += 2 * bytes_returned;
2782                 bcc_ptr += 2;   /* null term version string */
2783                 bytes_returned =
2784                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2785                                   64, nls_codepage);
2786                 bcc_ptr += 2 * bytes_returned;
2787                 *(bcc_ptr + 1) = 0;
2788                 *(bcc_ptr + 2) = 0;
2789                 bcc_ptr += 2;   /* null terminate network opsys string */
2790                 *(bcc_ptr + 1) = 0;
2791                 *(bcc_ptr + 2) = 0;
2792                 bcc_ptr += 2;   /* null domain */
2793         } else {                /* ASCII */
2794                 if (domain == NULL) {
2795                         SecurityBlob->DomainName.Buffer = 0;
2796                         SecurityBlob->DomainName.Length = 0;
2797                         SecurityBlob->DomainName.MaximumLength = 0;
2798                 } else {
2799                         __u16 len;
2800                         negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
2801                         strncpy(bcc_ptr, domain, 63);
2802                         len = strnlen(domain, 64);
2803                         SecurityBlob->DomainName.MaximumLength =
2804                             cpu_to_le16(len);
2805                         SecurityBlob->DomainName.Buffer =
2806                             cpu_to_le32(SecurityBlobLength);
2807                         bcc_ptr += len;
2808                         SecurityBlobLength += len;
2809                         SecurityBlob->DomainName.Length = cpu_to_le16(len);
2810                 }
2811                 if (user == NULL) {
2812                         SecurityBlob->UserName.Buffer = 0;
2813                         SecurityBlob->UserName.Length = 0;
2814                         SecurityBlob->UserName.MaximumLength = 0;
2815                 } else {
2816                         __u16 len;
2817                         strncpy(bcc_ptr, user, 63);
2818                         len = strnlen(user, 64);
2819                         SecurityBlob->UserName.MaximumLength =
2820                             cpu_to_le16(len);
2821                         SecurityBlob->UserName.Buffer =
2822                             cpu_to_le32(SecurityBlobLength);
2823                         bcc_ptr += len;
2824                         SecurityBlobLength += len;
2825                         SecurityBlob->UserName.Length = cpu_to_le16(len);
2826                 }
2827                 /* BB fill in our workstation name if known BB */
2828
2829                 strcpy(bcc_ptr, "Linux version ");
2830                 bcc_ptr += strlen("Linux version ");
2831                 strcpy(bcc_ptr, system_utsname.release);
2832                 bcc_ptr += strlen(system_utsname.release) + 1;
2833                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2834                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2835                 bcc_ptr++;      /* null domain */
2836                 *bcc_ptr = 0;
2837         }
2838         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2839         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2840         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2841         smb_buffer->smb_buf_length += count;
2842         pSMB->req.ByteCount = cpu_to_le16(count);
2843
2844         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2845                          &bytes_returned, 1);
2846         if (rc) {
2847 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2848         } else if ((smb_buffer_response->WordCount == 3)
2849                    || (smb_buffer_response->WordCount == 4)) {
2850                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2851                 __u16 blob_len =
2852                     le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2853                 if (action & GUEST_LOGIN)
2854                         cFYI(1, (" Guest login"));      /* BB do we want to set anything in SesInfo struct ? */
2855 /*        if(SecurityBlob2->MessageType != NtLm??){
2856                  cFYI("Unexpected message type on auth response is %d "));
2857         } */
2858                 if (ses) {
2859                         cFYI(1,
2860                              ("Does UID on challenge %d match auth response UID %d ",
2861                               ses->Suid, smb_buffer_response->Uid));
2862                         ses->Suid = smb_buffer_response->Uid; /* UID left in wire format */
2863                         bcc_ptr = pByteArea(smb_buffer_response);
2864             /* response can have either 3 or 4 word count - Samba sends 3 */
2865                         if ((pSMBr->resp.hdr.WordCount == 3)
2866                             || ((pSMBr->resp.hdr.WordCount == 4)
2867                                 && (blob_len <
2868                                     pSMBr->resp.ByteCount))) {
2869                                 if (pSMBr->resp.hdr.WordCount == 4) {
2870                                         bcc_ptr +=
2871                                             blob_len;
2872                                         cFYI(1,
2873                                              ("Security Blob Length %d ",
2874                                               blob_len));
2875                                 }
2876
2877                                 cFYI(1,
2878                                      ("NTLMSSP response to Authenticate "));
2879
2880                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2881                                         if ((long) (bcc_ptr) % 2) {
2882                                                 remaining_words =
2883                                                     (BCC(smb_buffer_response)
2884                                                      - 1) / 2;
2885                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
2886                                         } else {
2887                                                 remaining_words = BCC(smb_buffer_response) / 2;
2888                                         }
2889                                         len =
2890                                             UniStrnlen((wchar_t *) bcc_ptr,remaining_words - 1);
2891 /* We look for obvious messed up bcc or strings in response so we do not go off
2892   the end since (at least) WIN2K and Windows XP have a major bug in not null
2893   terminating last Unicode string in response  */
2894                                         if(ses->serverOS)
2895                                                 kfree(ses->serverOS);
2896                                         ses->serverOS =
2897                                             kzalloc(2 * (len + 1), GFP_KERNEL);
2898                                         cifs_strfromUCS_le(ses->serverOS,
2899                                                            (__le16 *)
2900                                                            bcc_ptr, len,
2901                                                            nls_codepage);
2902                                         bcc_ptr += 2 * (len + 1);
2903                                         remaining_words -= len + 1;
2904                                         ses->serverOS[2 * len] = 0;
2905                                         ses->serverOS[1 + (2 * len)] = 0;
2906                                         if (remaining_words > 0) {
2907                                                 len = UniStrnlen((wchar_t *)
2908                                                                  bcc_ptr,
2909                                                                  remaining_words
2910                                                                  - 1);
2911                                                 kfree(ses->serverNOS);
2912                                                 ses->serverNOS =
2913                                                     kzalloc(2 * (len + 1),
2914                                                             GFP_KERNEL);
2915                                                 cifs_strfromUCS_le(ses->
2916                                                                    serverNOS,
2917                                                                    (__le16 *)
2918                                                                    bcc_ptr,
2919                                                                    len,
2920                                                                    nls_codepage);
2921                                                 bcc_ptr += 2 * (len + 1);
2922                                                 ses->serverNOS[2 * len] = 0;
2923                                                 ses->serverNOS[1+(2*len)] = 0;
2924                                                 remaining_words -= len + 1;
2925                                                 if (remaining_words > 0) {
2926                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2927      /* last string not always null terminated (e.g. for Windows XP & 2000) */
2928                                                         if(ses->serverDomain)
2929                                                                 kfree(ses->serverDomain);
2930                                                         ses->serverDomain =
2931                                                             kzalloc(2 *
2932                                                                     (len +
2933                                                                      1),
2934                                                                     GFP_KERNEL);
2935                                                         cifs_strfromUCS_le
2936                                                             (ses->
2937                                                              serverDomain,
2938                                                              (__le16 *)
2939                                                              bcc_ptr, len,
2940                                                              nls_codepage);
2941                                                         bcc_ptr +=
2942                                                             2 * (len + 1);
2943                                                         ses->
2944                                                             serverDomain[2
2945                                                                          * len]
2946                                                             = 0;
2947                                                         ses->
2948                                                             serverDomain[1
2949                                                                          +
2950                                                                          (2
2951                                                                           *
2952                                                                           len)]
2953                                                             = 0;
2954                                                 } /* else no more room so create dummy domain string */
2955                                                 else {
2956                                                         if(ses->serverDomain)
2957                                                                 kfree(ses->serverDomain);
2958                                                         ses->serverDomain = kzalloc(2,GFP_KERNEL);
2959                                                 }
2960                                         } else {  /* no room so create dummy domain and NOS string */
2961                                                 if(ses->serverDomain)
2962                                                         kfree(ses->serverDomain);
2963                                                 ses->serverDomain = kzalloc(2, GFP_KERNEL);
2964                                                 kfree(ses->serverNOS);
2965                                                 ses->serverNOS = kzalloc(2, GFP_KERNEL);
2966                                         }
2967                                 } else {        /* ASCII */
2968                                         len = strnlen(bcc_ptr, 1024);
2969                                         if (((long) bcc_ptr + len) -
2970                         (long) pByteArea(smb_buffer_response)
2971                             <= BCC(smb_buffer_response)) {
2972                                                 if(ses->serverOS)
2973                                                         kfree(ses->serverOS);
2974                                                 ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
2975                                                 strncpy(ses->serverOS,bcc_ptr, len);
2976
2977                                                 bcc_ptr += len;
2978                                                 bcc_ptr[0] = 0; /* null terminate the string */
2979                                                 bcc_ptr++;
2980
2981                                                 len = strnlen(bcc_ptr, 1024);
2982                                                 kfree(ses->serverNOS);
2983                                                 ses->serverNOS = kzalloc(len+1,GFP_KERNEL);
2984                                                 strncpy(ses->serverNOS, bcc_ptr, len);
2985                                                 bcc_ptr += len;
2986                                                 bcc_ptr[0] = 0;
2987                                                 bcc_ptr++;
2988
2989                                                 len = strnlen(bcc_ptr, 1024);
2990                                                 if(ses->serverDomain)
2991                                                         kfree(ses->serverDomain);
2992                                                 ses->serverDomain = kzalloc(len+1,GFP_KERNEL);
2993                                                 strncpy(ses->serverDomain, bcc_ptr, len);
2994                                                 bcc_ptr += len;
2995                                                 bcc_ptr[0] = 0;
2996                                                 bcc_ptr++;
2997                                         } else
2998                                                 cFYI(1,
2999                                                      ("Variable field of length %d extends beyond end of smb ",
3000                                                       len));
3001                                 }
3002                         } else {
3003                                 cERROR(1,
3004                                        (" Security Blob Length extends beyond end of SMB"));
3005                         }
3006                 } else {
3007                         cERROR(1, ("No session structure passed in."));
3008                 }
3009         } else {
3010                 cERROR(1,
3011                        (" Invalid Word count %d: ",
3012                         smb_buffer_response->WordCount));
3013                 rc = -EIO;
3014         }
3015
3016         if (smb_buffer)
3017                 cifs_buf_release(smb_buffer);
3018
3019         return rc;
3020 }
3021
3022 int
3023 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
3024          const char *tree, struct cifsTconInfo *tcon,
3025          const struct nls_table *nls_codepage)
3026 {
3027         struct smb_hdr *smb_buffer;
3028         struct smb_hdr *smb_buffer_response;
3029         TCONX_REQ *pSMB;
3030         TCONX_RSP *pSMBr;
3031         unsigned char *bcc_ptr;
3032         int rc = 0;
3033         int length;
3034         __u16 count;
3035
3036         if (ses == NULL)
3037                 return -EIO;
3038
3039         smb_buffer = cifs_buf_get();
3040         if (smb_buffer == NULL) {
3041                 return -ENOMEM;
3042         }
3043         smb_buffer_response = smb_buffer;
3044
3045         header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3046                         NULL /*no tid */ , 4 /*wct */ );
3047
3048         smb_buffer->Mid = GetNextMid(ses->server);
3049         smb_buffer->Uid = ses->Suid;
3050         pSMB = (TCONX_REQ *) smb_buffer;
3051         pSMBr = (TCONX_RSP *) smb_buffer_response;
3052
3053         pSMB->AndXCommand = 0xFF;
3054         pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3055         bcc_ptr = &pSMB->Password[0];
3056         if((ses->server->secMode) & SECMODE_USER) {
3057                 pSMB->PasswordLength = cpu_to_le16(1);  /* minimum */
3058                 *bcc_ptr = 0; /* password is null byte */
3059                 bcc_ptr++;              /* skip password */
3060                 /* already aligned so no need to do it below */
3061         } else {
3062                 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
3063                 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3064                    specified as required (when that support is added to
3065                    the vfs in the future) as only NTLM or the much
3066                    weaker LANMAN (which we do not send by default) is accepted
3067                    by Samba (not sure whether other servers allow
3068                    NTLMv2 password here) */
3069 #ifdef CONFIG_CIFS_WEAK_PW_HASH
3070                 if((extended_security & CIFSSEC_MAY_LANMAN) &&
3071                         (ses->server->secType == LANMAN))
3072                         calc_lanman_hash(ses, bcc_ptr);
3073                 else
3074 #endif /* CIFS_WEAK_PW_HASH */
3075                 SMBNTencrypt(ses->password,
3076                              ses->server->cryptKey,
3077                              bcc_ptr);
3078
3079                 bcc_ptr += CIFS_SESS_KEY_SIZE;
3080                 if(ses->capabilities & CAP_UNICODE) {
3081                         /* must align unicode strings */
3082                         *bcc_ptr = 0; /* null byte password */
3083                         bcc_ptr++;
3084                 }
3085         }
3086
3087         if(ses->server->secMode &
3088                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3089                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3090
3091         if (ses->capabilities & CAP_STATUS32) {
3092                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3093         }
3094         if (ses->capabilities & CAP_DFS) {
3095                 smb_buffer->Flags2 |= SMBFLG2_DFS;
3096         }
3097         if (ses->capabilities & CAP_UNICODE) {
3098                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3099                 length =
3100                     cifs_strtoUCS((__le16 *) bcc_ptr, tree,
3101                         6 /* max utf8 char length in bytes */ *
3102                         (/* server len*/ + 256 /* share len */), nls_codepage);
3103                 bcc_ptr += 2 * length;  /* convert num 16 bit words to bytes */
3104                 bcc_ptr += 2;   /* skip trailing null */
3105         } else {                /* ASCII */
3106                 strcpy(bcc_ptr, tree);
3107                 bcc_ptr += strlen(tree) + 1;
3108         }
3109         strcpy(bcc_ptr, "?????");
3110         bcc_ptr += strlen("?????");
3111         bcc_ptr += 1;
3112         count = bcc_ptr - &pSMB->Password[0];
3113         pSMB->hdr.smb_buf_length += count;
3114         pSMB->ByteCount = cpu_to_le16(count);
3115
3116         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, 0);
3117
3118         /* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
3119         /* above now done in SendReceive */
3120         if ((rc == 0) && (tcon != NULL)) {
3121                 tcon->tidStatus = CifsGood;
3122                 tcon->tid = smb_buffer_response->Tid;
3123                 bcc_ptr = pByteArea(smb_buffer_response);
3124                 length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
3125         /* skip service field (NB: this field is always ASCII) */
3126                 bcc_ptr += length + 1;
3127                 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3128                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3129                         length = UniStrnlen((wchar_t *) bcc_ptr, 512);
3130                         if ((bcc_ptr + (2 * length)) -
3131                              pByteArea(smb_buffer_response) <=
3132                             BCC(smb_buffer_response)) {
3133                                 kfree(tcon->nativeFileSystem);
3134                                 tcon->nativeFileSystem =
3135                                     kzalloc(length + 2, GFP_KERNEL);
3136                                 cifs_strfromUCS_le(tcon->nativeFileSystem,
3137                                                    (__le16 *) bcc_ptr,
3138                                                    length, nls_codepage);
3139                                 bcc_ptr += 2 * length;
3140                                 bcc_ptr[0] = 0; /* null terminate the string */
3141                                 bcc_ptr[1] = 0;
3142                                 bcc_ptr += 2;
3143                         }
3144                         /* else do not bother copying these informational fields */
3145                 } else {
3146                         length = strnlen(bcc_ptr, 1024);
3147                         if ((bcc_ptr + length) -
3148                             pByteArea(smb_buffer_response) <=
3149                             BCC(smb_buffer_response)) {
3150                                 kfree(tcon->nativeFileSystem);
3151                                 tcon->nativeFileSystem =
3152                                     kzalloc(length + 1, GFP_KERNEL);
3153                                 strncpy(tcon->nativeFileSystem, bcc_ptr,
3154                                         length);
3155                         }
3156                         /* else do not bother copying these informational fields */
3157                 }
3158                 if(smb_buffer_response->WordCount == 3)
3159                         tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3160                 else
3161                         tcon->Flags = 0;
3162                 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
3163         } else if ((rc == 0) && tcon == NULL) {
3164         /* all we need to save for IPC$ connection */
3165                 ses->ipc_tid = smb_buffer_response->Tid;
3166         }
3167
3168         if (smb_buffer)
3169                 cifs_buf_release(smb_buffer);
3170         return rc;
3171 }
3172
3173 int
3174 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3175 {
3176         int rc = 0;
3177         int xid;
3178         struct cifsSesInfo *ses = NULL;
3179         struct task_struct *cifsd_task;
3180
3181         xid = GetXid();
3182
3183         if (cifs_sb->tcon) {
3184                 ses = cifs_sb->tcon->ses; /* save ptr to ses before delete tcon!*/
3185                 rc = CIFSSMBTDis(xid, cifs_sb->tcon);
3186                 if (rc == -EBUSY) {
3187                         FreeXid(xid);
3188                         return 0;
3189                 }
3190                 tconInfoFree(cifs_sb->tcon);
3191                 if ((ses) && (ses->server)) {
3192                         /* save off task so we do not refer to ses later */
3193                         cifsd_task = ses->server->tsk;
3194                         cFYI(1, ("About to do SMBLogoff "));
3195                         rc = CIFSSMBLogoff(xid, ses);
3196                         if (rc == -EBUSY) {
3197                                 FreeXid(xid);
3198                                 return 0;
3199                         } else if (rc == -ESHUTDOWN) {
3200                                 cFYI(1,("Waking up socket by sending it signal"));
3201                                 if(cifsd_task) {
3202                                         send_sig(SIGKILL,cifsd_task,1);
3203                                         wait_for_completion(&cifsd_complete);
3204                                 }
3205                                 rc = 0;
3206                         } /* else - we have an smb session
3207                                 left on this socket do not kill cifsd */
3208                 } else
3209                         cFYI(1, ("No session or bad tcon"));
3210         }
3211
3212         cifs_sb->tcon = NULL;
3213         if (ses)
3214                 schedule_timeout_interruptible(msecs_to_jiffies(500));
3215         if (ses)
3216                 sesInfoFree(ses);
3217
3218         FreeXid(xid);
3219         return rc;              /* BB check if we should always return zero here */
3220 }
3221
3222 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3223                                            struct nls_table * nls_info)
3224 {
3225         int rc = 0;
3226         char ntlm_session_key[CIFS_SESS_KEY_SIZE];
3227         int ntlmv2_flag = FALSE;
3228         int first_time = 0;
3229
3230         /* what if server changes its buffer size after dropping the session? */
3231         if(pSesInfo->server->maxBuf == 0) /* no need to send on reconnect */ {
3232                 rc = CIFSSMBNegotiate(xid, pSesInfo);
3233                 if(rc == -EAGAIN) /* retry only once on 1st time connection */ {
3234                         rc = CIFSSMBNegotiate(xid, pSesInfo);
3235                         if(rc == -EAGAIN)
3236                                 rc = -EHOSTDOWN;
3237                 }
3238                 if(rc == 0) {
3239                         spin_lock(&GlobalMid_Lock);
3240                         if(pSesInfo->server->tcpStatus != CifsExiting)
3241                                 pSesInfo->server->tcpStatus = CifsGood;
3242                         else
3243                                 rc = -EHOSTDOWN;
3244                         spin_unlock(&GlobalMid_Lock);
3245
3246                 }
3247                 first_time = 1;
3248         }
3249         if (!rc) {
3250                 pSesInfo->capabilities = pSesInfo->server->capabilities;
3251                 if(linuxExtEnabled == 0)
3252                         pSesInfo->capabilities &= (~CAP_UNIX);
3253         /*      pSesInfo->sequence_number = 0;*/
3254                 cFYI(1,("Security Mode: 0x%x Capabilities: 0x%x Time Zone: %d",
3255                         pSesInfo->server->secMode,
3256                         pSesInfo->server->capabilities,
3257                         pSesInfo->server->timeZone));
3258                 if(experimEnabled < 2)
3259                         rc = CIFS_SessSetup(xid, pSesInfo,
3260                                             first_time, nls_info);
3261                 else if (extended_security
3262                                 && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3263                                 && (pSesInfo->server->secType == NTLMSSP)) {
3264                         rc = -EOPNOTSUPP;
3265                 } else if (extended_security
3266                            && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3267                            && (pSesInfo->server->secType == RawNTLMSSP)) {
3268                         cFYI(1, ("NTLMSSP sesssetup"));
3269                         rc = CIFSNTLMSSPNegotiateSessSetup(xid,
3270                                                 pSesInfo,
3271                                                 &ntlmv2_flag,
3272                                                 nls_info);
3273                         if (!rc) {
3274                                 if(ntlmv2_flag) {
3275                                         char * v2_response;
3276                                         cFYI(1,("Can use more secure NTLM version 2 password hash"));
3277                                         if(CalcNTLMv2_partial_mac_key(pSesInfo,
3278                                                 nls_info)) {
3279                                                 rc = -ENOMEM;
3280                                                 goto ss_err_exit;
3281                                         } else
3282                                                 v2_response = kmalloc(16 + 64 /* blob */, GFP_KERNEL);
3283                                         if(v2_response) {
3284                                                 CalcNTLMv2_response(pSesInfo,v2_response);
3285                                 /*              if(first_time)
3286                                                         cifs_calculate_ntlmv2_mac_key(
3287                                                           pSesInfo->server->mac_signing_key,
3288                                                           response, ntlm_session_key, */
3289                                                 kfree(v2_response);
3290                                         /* BB Put dummy sig in SessSetup PDU? */
3291                                         } else {
3292                                                 rc = -ENOMEM;
3293                                                 goto ss_err_exit;
3294                                         }
3295
3296                                 } else {
3297                                         SMBNTencrypt(pSesInfo->password,
3298                                                 pSesInfo->server->cryptKey,
3299                                                 ntlm_session_key);
3300
3301                                         if(first_time)
3302                                                 cifs_calculate_mac_key(
3303                                                         pSesInfo->server->mac_signing_key,
3304                                                         ntlm_session_key,
3305                                                         pSesInfo->password);
3306                                 }
3307                         /* for better security the weaker lanman hash not sent
3308                            in AuthSessSetup so we no longer calculate it */
3309
3310                                 rc = CIFSNTLMSSPAuthSessSetup(xid,
3311                                         pSesInfo,
3312                                         ntlm_session_key,
3313                                         ntlmv2_flag,
3314                                         nls_info);
3315                         }
3316                 } else { /* old style NTLM 0.12 session setup */
3317                         SMBNTencrypt(pSesInfo->password,
3318                                 pSesInfo->server->cryptKey,
3319                                 ntlm_session_key);
3320
3321                         if(first_time)
3322                                 cifs_calculate_mac_key(
3323                                         pSesInfo->server->mac_signing_key,
3324                                         ntlm_session_key, pSesInfo->password);
3325
3326                         rc = CIFSSessSetup(xid, pSesInfo,
3327                                 ntlm_session_key, nls_info);
3328                 }
3329                 if (rc) {
3330                         cERROR(1,("Send error in SessSetup = %d",rc));
3331                 } else {
3332                         cFYI(1,("CIFS Session Established successfully"));
3333                         pSesInfo->status = CifsGood;
3334                 }
3335         }
3336 ss_err_exit:
3337         return rc;
3338 }
3339