err.no Git - linux-2.6/blob - fs/cifs/connect.c

   1 /*
   2  *   fs/cifs/connect.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2005
   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 SMBencrypt(unsigned char *passwd, unsigned char *c8,
  53                        unsigned char *p24);
  54 extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
  55                          unsigned char *p24);
  56
  57 extern mempool_t *cifs_req_poolp;
  58
  59 struct smb_vol {
  60         char *username;
  61         char *password;
  62         char *domainname;
  63         char *UNC;
  64         char *UNCip;
  65         char *in6_addr;  /* ipv6 address as human readable form of in6_addr */
  66         char *iocharset;  /* local code page for mapping to and from Unicode */
  67         char source_rfc1001_name[16]; /* netbios name of client */
  68         char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
  69         uid_t linux_uid;
  70         gid_t linux_gid;
  71         mode_t file_mode;
  72         mode_t dir_mode;
  73         unsigned rw:1;
  74         unsigned retry:1;
  75         unsigned intr:1;
  76         unsigned setuids:1;
  77         unsigned noperm:1;
  78         unsigned no_psx_acl:1; /* set if posix acl support should be disabled */
  79         unsigned cifs_acl:1;
  80         unsigned no_xattr:1;   /* set if xattr (EA) support should be disabled*/
  81         unsigned server_ino:1; /* use inode numbers from server ie UniqueId */
  82         unsigned direct_io:1;
  83         unsigned remap:1;   /* set to remap seven reserved chars in filenames */
  84         unsigned posix_paths:1;   /* unset to not ask for posix pathnames. */
  85         unsigned sfu_emul:1;
  86         unsigned krb5:1;
  87         unsigned ntlm:1;
  88         unsigned ntlmv2:1;
  89         unsigned nullauth:1; /* attempt to authenticate with null user */
  90         unsigned sign:1;
  91         unsigned seal:1;     /* encrypt */
  92         unsigned nocase;     /* request case insensitive filenames */
  93         unsigned nobrl;      /* disable sending byte range locks to srv */
  94         unsigned int rsize;
  95         unsigned int wsize;
  96         unsigned int sockopt;
  97         unsigned short int port;
  98 };
  99
 100 static int ipv4_connect(struct sockaddr_in *psin_server,
 101                         struct socket **csocket,
 102                         char * netb_name,
 103                         char * server_netb_name);
 104 static int ipv6_connect(struct sockaddr_in6 *psin_server,
 105                         struct socket **csocket);
 106
 107
 108         /*
 109          * cifs tcp session reconnection
 110          *
 111          * mark tcp session as reconnecting so temporarily locked
 112          * mark all smb sessions as reconnecting for tcp session
 113          * reconnect tcp session
 114          * wake up waiters on reconnection? - (not needed currently)
 115          */
 116
 117 int
 118 cifs_reconnect(struct TCP_Server_Info *server)
 119 {
 120         int rc = 0;
 121         struct list_head *tmp;
 122         struct cifsSesInfo *ses;
 123         struct cifsTconInfo *tcon;
 124         struct mid_q_entry * mid_entry;
 125
 126         spin_lock(&GlobalMid_Lock);
 127         if(server->tcpStatus == CifsExiting) {
 128                 /* the demux thread will exit normally
 129                 next time through the loop */
 130                 spin_unlock(&GlobalMid_Lock);
 131                 return rc;
 132         } else
 133                 server->tcpStatus = CifsNeedReconnect;
 134         spin_unlock(&GlobalMid_Lock);
 135         server->maxBuf = 0;
 136
 137         cFYI(1, ("Reconnecting tcp session"));
 138
 139         /* before reconnecting the tcp session, mark the smb session (uid)
 140                 and the tid bad so they are not used until reconnected */
 141         read_lock(&GlobalSMBSeslock);
 142         list_for_each(tmp, &GlobalSMBSessionList) {
 143                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
 144                 if (ses->server) {
 145                         if (ses->server == server) {
 146                                 ses->status = CifsNeedReconnect;
 147                                 ses->ipc_tid = 0;
 148                         }
 149                 }
 150                 /* else tcp and smb sessions need reconnection */
 151         }
 152         list_for_each(tmp, &GlobalTreeConnectionList) {
 153                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
 154                 if((tcon) && (tcon->ses) && (tcon->ses->server == server)) {
 155                         tcon->tidStatus = CifsNeedReconnect;
 156                 }
 157         }
 158         read_unlock(&GlobalSMBSeslock);
 159         /* do not want to be sending data on a socket we are freeing */
 160         down(&server->tcpSem);
 161         if(server->ssocket) {
 162                 cFYI(1,("State: 0x%x Flags: 0x%lx", server->ssocket->state,
 163                         server->ssocket->flags));
 164                 server->ssocket->ops->shutdown(server->ssocket,SEND_SHUTDOWN);
 165                 cFYI(1,("Post shutdown state: 0x%x Flags: 0x%lx", server->ssocket->state,
 166                         server->ssocket->flags));
 167                 sock_release(server->ssocket);
 168                 server->ssocket = NULL;
 169         }
 170
 171         spin_lock(&GlobalMid_Lock);
 172         list_for_each(tmp, &server->pending_mid_q) {
 173                 mid_entry = list_entry(tmp, struct
 174                                         mid_q_entry,
 175                                         qhead);
 176                 if(mid_entry) {
 177                         if(mid_entry->midState == MID_REQUEST_SUBMITTED) {
 178                                 /* Mark other intransit requests as needing
 179                                    retry so we do not immediately mark the
 180                                    session bad again (ie after we reconnect
 181                                    below) as they timeout too */
 182                                 mid_entry->midState = MID_RETRY_NEEDED;
 183                         }
 184                 }
 185         }
 186         spin_unlock(&GlobalMid_Lock);
 187         up(&server->tcpSem);
 188
 189         while ((server->tcpStatus != CifsExiting) && (server->tcpStatus != CifsGood))
 190         {
 191                 if(server->protocolType == IPV6) {
 192                         rc = ipv6_connect(&server->addr.sockAddr6,&server->ssocket);
 193                 } else {
 194                         rc = ipv4_connect(&server->addr.sockAddr,
 195                                         &server->ssocket,
 196                                         server->workstation_RFC1001_name,
 197                                         server->server_RFC1001_name);
 198                 }
 199                 if(rc) {
 200                         cFYI(1,("reconnect error %d",rc));
 201                         msleep(3000);
 202                 } else {
 203                         atomic_inc(&tcpSesReconnectCount);
 204                         spin_lock(&GlobalMid_Lock);
 205                         if(server->tcpStatus != CifsExiting)
 206                                 server->tcpStatus = CifsGood;
 207                         server->sequence_number = 0;
 208                         spin_unlock(&GlobalMid_Lock);
 209         /*              atomic_set(&server->inFlight,0);*/
 210                         wake_up(&server->response_q);
 211                 }
 212         }
 213         return rc;
 214 }
 215
 216 /*
 217         return codes:
 218                 0       not a transact2, or all data present
 219                 >0      transact2 with that much data missing
 220                 -EINVAL = invalid transact2
 221
 222  */
 223 static int check2ndT2(struct smb_hdr * pSMB, unsigned int maxBufSize)
 224 {
 225         struct smb_t2_rsp * pSMBt;
 226         int total_data_size;
 227         int data_in_this_rsp;
 228         int remaining;
 229
 230         if(pSMB->Command != SMB_COM_TRANSACTION2)
 231                 return 0;
 232
 233         /* check for plausible wct, bcc and t2 data and parm sizes */
 234         /* check for parm and data offset going beyond end of smb */
 235         if(pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
 236                 cFYI(1,("invalid transact2 word count"));
 237                 return -EINVAL;
 238         }
 239
 240         pSMBt = (struct smb_t2_rsp *)pSMB;
 241
 242         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 243         data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 244
 245         remaining = total_data_size - data_in_this_rsp;
 246
 247         if(remaining == 0)
 248                 return 0;
 249         else if(remaining < 0) {
 250                 cFYI(1,("total data %d smaller than data in frame %d",
 251                         total_data_size, data_in_this_rsp));
 252                 return -EINVAL;
 253         } else {
 254                 cFYI(1,("missing %d bytes from transact2, check next response",
 255                         remaining));
 256                 if(total_data_size > maxBufSize) {
 257                         cERROR(1,("TotalDataSize %d is over maximum buffer %d",
 258                                 total_data_size,maxBufSize));
 259                         return -EINVAL;
 260                 }
 261                 return remaining;
 262         }
 263 }
 264
 265 static int coalesce_t2(struct smb_hdr * psecond, struct smb_hdr *pTargetSMB)
 266 {
 267         struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
 268         struct smb_t2_rsp *pSMBt  = (struct smb_t2_rsp *)pTargetSMB;
 269         int total_data_size;
 270         int total_in_buf;
 271         int remaining;
 272         int total_in_buf2;
 273         char * data_area_of_target;
 274         char * data_area_of_buf2;
 275         __u16 byte_count;
 276
 277         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 278
 279         if(total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
 280                 cFYI(1,("total data sizes of primary and secondary t2 differ"));
 281         }
 282
 283         total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 284
 285         remaining = total_data_size - total_in_buf;
 286
 287         if(remaining < 0)
 288                 return -EINVAL;
 289
 290         if(remaining == 0) /* nothing to do, ignore */
 291                 return 0;
 292
 293         total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
 294         if(remaining < total_in_buf2) {
 295                 cFYI(1,("transact2 2nd response contains too much data"));
 296         }
 297
 298         /* find end of first SMB data area */
 299         data_area_of_target = (char *)&pSMBt->hdr.Protocol +
 300                                 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
 301         /* validate target area */
 302
 303         data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
 304                                         le16_to_cpu(pSMB2->t2_rsp.DataOffset);
 305
 306         data_area_of_target += total_in_buf;
 307
 308         /* copy second buffer into end of first buffer */
 309         memcpy(data_area_of_target,data_area_of_buf2,total_in_buf2);
 310         total_in_buf += total_in_buf2;
 311         pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
 312         byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
 313         byte_count += total_in_buf2;
 314         BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
 315
 316         byte_count = pTargetSMB->smb_buf_length;
 317         byte_count += total_in_buf2;
 318
 319         /* BB also add check that we are not beyond maximum buffer size */
 320
 321         pTargetSMB->smb_buf_length = byte_count;
 322
 323         if(remaining == total_in_buf2) {
 324                 cFYI(1,("found the last secondary response"));
 325                 return 0; /* we are done */
 326         } else /* more responses to go */
 327                 return 1;
 328
 329 }
 330
 331 static int
 332 cifs_demultiplex_thread(struct TCP_Server_Info *server)
 333 {
 334         int length;
 335         unsigned int pdu_length, total_read;
 336         struct smb_hdr *smb_buffer = NULL;
 337         struct smb_hdr *bigbuf = NULL;
 338         struct smb_hdr *smallbuf = NULL;
 339         struct msghdr smb_msg;
 340         struct kvec iov;
 341         struct socket *csocket = server->ssocket;
 342         struct list_head *tmp;
 343         struct cifsSesInfo *ses;
 344         struct task_struct *task_to_wake = NULL;
 345         struct mid_q_entry *mid_entry;
 346         char temp;
 347         int isLargeBuf = FALSE;
 348         int isMultiRsp;
 349         int reconnect;
 350
 351         daemonize("cifsd");
 352         allow_signal(SIGKILL);
 353         current->flags |= PF_MEMALLOC;
 354         server->tsk = current;  /* save process info to wake at shutdown */
 355         cFYI(1, ("Demultiplex PID: %d", current->pid));
 356         write_lock(&GlobalSMBSeslock);
 357         atomic_inc(&tcpSesAllocCount);
 358         length = tcpSesAllocCount.counter;
 359         write_unlock(&GlobalSMBSeslock);
 360         complete(&cifsd_complete);
 361         if(length  > 1) {
 362                 mempool_resize(cifs_req_poolp,
 363                         length + cifs_min_rcv,
 364                         GFP_KERNEL);
 365         }
 366
 367         while (server->tcpStatus != CifsExiting) {
 368                 if (try_to_freeze())
 369                         continue;
 370                 if (bigbuf == NULL) {
 371                         bigbuf = cifs_buf_get();
 372                         if(bigbuf == NULL) {
 373                                 cERROR(1,("No memory for large SMB response"));
 374                                 msleep(3000);
 375                                 /* retry will check if exiting */
 376                                 continue;
 377                         }
 378                 } else if(isLargeBuf) {
 379                         /* we are reusing a dirtry large buf, clear its start */
 380                         memset(bigbuf, 0, sizeof (struct smb_hdr));
 381                 }
 382
 383                 if (smallbuf == NULL) {
 384                         smallbuf = cifs_small_buf_get();
 385                         if(smallbuf == NULL) {
 386                                 cERROR(1,("No memory for SMB response"));
 387                                 msleep(1000);
 388                                 /* retry will check if exiting */
 389                                 continue;
 390                         }
 391                         /* beginning of smb buffer is cleared in our buf_get */
 392                 } else /* if existing small buf clear beginning */
 393                         memset(smallbuf, 0, sizeof (struct smb_hdr));
 394
 395                 isLargeBuf = FALSE;
 396                 isMultiRsp = FALSE;
 397                 smb_buffer = smallbuf;
 398                 iov.iov_base = smb_buffer;
 399                 iov.iov_len = 4;
 400                 smb_msg.msg_control = NULL;
 401                 smb_msg.msg_controllen = 0;
 402                 length =
 403                     kernel_recvmsg(csocket, &smb_msg,
 404                                  &iov, 1, 4, 0 /* BB see socket.h flags */);
 405
 406                 if(server->tcpStatus == CifsExiting) {
 407                         break;
 408                 } else if (server->tcpStatus == CifsNeedReconnect) {
 409                         cFYI(1,("Reconnect after server stopped responding"));
 410                         cifs_reconnect(server);
 411                         cFYI(1,("call to reconnect done"));
 412                         csocket = server->ssocket;
 413                         continue;
 414                 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
 415                         msleep(1); /* minimum sleep to prevent looping
 416                                 allowing socket to clear and app threads to set
 417                                 tcpStatus CifsNeedReconnect if server hung */
 418                         continue;
 419                 } else if (length <= 0) {
 420                         if(server->tcpStatus == CifsNew) {
 421                                 cFYI(1,("tcp session abend after SMBnegprot"));
 422                                 /* some servers kill the TCP session rather than
 423                                    returning an SMB negprot error, in which
 424                                    case reconnecting here is not going to help,
 425                                    and so simply return error to mount */
 426                                 break;
 427                         }
 428                         if(length == -EINTR) {
 429                                 cFYI(1,("cifsd thread killed"));
 430                                 break;
 431                         }
 432                         cFYI(1,("Reconnect after unexpected peek error %d",
 433                                 length));
 434                         cifs_reconnect(server);
 435                         csocket = server->ssocket;
 436                         wake_up(&server->response_q);
 437                         continue;
 438                 } else if (length < 4) {
 439                         cFYI(1,
 440                             ("Frame under four bytes received (%d bytes long)",
 441                               length));
 442                         cifs_reconnect(server);
 443                         csocket = server->ssocket;
 444                         wake_up(&server->response_q);
 445                         continue;
 446                 }
 447
 448                 /* The right amount was read from socket - 4 bytes */
 449                 /* so we can now interpret the length field */
 450
 451                 /* the first byte big endian of the length field,
 452                 is actually not part of the length but the type
 453                 with the most common, zero, as regular data */
 454                 temp = *((char *) smb_buffer);
 455
 456                 /* Note that FC 1001 length is big endian on the wire,
 457                 but we convert it here so it is always manipulated
 458                 as host byte order */
 459                 pdu_length = ntohl(smb_buffer->smb_buf_length);
 460                 smb_buffer->smb_buf_length = pdu_length;
 461
 462                 cFYI(1,("rfc1002 length 0x%x)", pdu_length+4));
 463
 464                 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
 465                         continue;
 466                 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
 467                         cFYI(1,("Good RFC 1002 session rsp"));
 468                         continue;
 469                 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
 470                         /* we get this from Windows 98 instead of
 471                            an error on SMB negprot response */
 472                         cFYI(1,("Negative RFC1002 Session Response Error 0x%x)",
 473                                 pdu_length));
 474                         if(server->tcpStatus == CifsNew) {
 475                                 /* if nack on negprot (rather than
 476                                 ret of smb negprot error) reconnecting
 477                                 not going to help, ret error to mount */
 478                                 break;
 479                         } else {
 480                                 /* give server a second to
 481                                 clean up before reconnect attempt */
 482                                 msleep(1000);
 483                                 /* always try 445 first on reconnect
 484                                 since we get NACK on some if we ever
 485                                 connected to port 139 (the NACK is
 486                                 since we do not begin with RFC1001
 487                                 session initialize frame) */
 488                                 server->addr.sockAddr.sin_port =
 489                                         htons(CIFS_PORT);
 490                                 cifs_reconnect(server);
 491                                 csocket = server->ssocket;
 492                                 wake_up(&server->response_q);
 493                                 continue;
 494                         }
 495                 } else if (temp != (char) 0) {
 496                         cERROR(1,("Unknown RFC 1002 frame"));
 497                         cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
 498                                       length);
 499                         cifs_reconnect(server);
 500                         csocket = server->ssocket;
 501                         continue;
 502                 }
 503
 504                 /* else we have an SMB response */
 505                 if((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
 506                             (pdu_length < sizeof (struct smb_hdr) - 1 - 4)) {
 507                         cERROR(1, ("Invalid size SMB length %d pdu_length %d",
 508                                         length, pdu_length+4));
 509                         cifs_reconnect(server);
 510                         csocket = server->ssocket;
 511                         wake_up(&server->response_q);
 512                         continue;
 513                 }
 514
 515                 /* else length ok */
 516                 reconnect = 0;
 517
 518                 if(pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
 519                         isLargeBuf = TRUE;
 520                         memcpy(bigbuf, smallbuf, 4);
 521                         smb_buffer = bigbuf;
 522                 }
 523                 length = 0;
 524                 iov.iov_base = 4 + (char *)smb_buffer;
 525                 iov.iov_len = pdu_length;
 526                 for (total_read = 0; total_read < pdu_length;
 527                      total_read += length) {
 528                         length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
 529                                                 pdu_length - total_read, 0);
 530                         if((server->tcpStatus == CifsExiting) ||
 531                             (length == -EINTR)) {
 532                                 /* then will exit */
 533                                 reconnect = 2;
 534                                 break;
 535                         } else if (server->tcpStatus == CifsNeedReconnect) {
 536                                 cifs_reconnect(server);
 537                                 csocket = server->ssocket;
 538                                 /* Reconnect wakes up rspns q */
 539                                 /* Now we will reread sock */
 540                                 reconnect = 1;
 541                                 break;
 542                         } else if ((length == -ERESTARTSYS) ||
 543                                    (length == -EAGAIN)) {
 544                                 msleep(1); /* minimum sleep to prevent looping,
 545                                               allowing socket to clear and app
 546                                               threads to set tcpStatus
 547                                               CifsNeedReconnect if server hung*/
 548                                 continue;
 549                         } else if (length <= 0) {
 550                                 cERROR(1,("Received no data, expecting %d",
 551                                               pdu_length - total_read));
 552                                 cifs_reconnect(server);
 553                                 csocket = server->ssocket;
 554                                 reconnect = 1;
 555                                 break;
 556                         }
 557                 }
 558                 if(reconnect == 2)
 559                         break;
 560                 else if(reconnect == 1)
 561                         continue;
 562
 563                 length += 4; /* account for rfc1002 hdr */
 564
 565
 566                 dump_smb(smb_buffer, length);
 567                 if (checkSMB (smb_buffer, smb_buffer->Mid, total_read+4)) {
 568                         cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
 569                         continue;
 570                 }
 571
 572
 573                 task_to_wake = NULL;
 574                 spin_lock(&GlobalMid_Lock);
 575                 list_for_each(tmp, &server->pending_mid_q) {
 576                         mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 577
 578                         if ((mid_entry->mid == smb_buffer->Mid) &&
 579                             (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
 580                             (mid_entry->command == smb_buffer->Command)) {
 581                                 if(check2ndT2(smb_buffer,server->maxBuf) > 0) {
 582                                         /* We have a multipart transact2 resp */
 583                                         isMultiRsp = TRUE;
 584                                         if(mid_entry->resp_buf) {
 585                                                 /* merge response - fix up 1st*/
 586                                                 if(coalesce_t2(smb_buffer,
 587                                                         mid_entry->resp_buf)) {
 588                                                         break;
 589                                                 } else {
 590                                                         /* all parts received */
 591                                                         goto multi_t2_fnd;
 592                                                 }
 593                                         } else {
 594                                                 if(!isLargeBuf) {
 595                                                         cERROR(1,("1st trans2 resp needs bigbuf"));
 596                                         /* BB maybe we can fix this up,  switch
 597                                            to already allocated large buffer? */
 598                                                 } else {
 599                                                         /* Have first buffer */
 600                                                         mid_entry->resp_buf =
 601                                                                  smb_buffer;
 602                                                         mid_entry->largeBuf = 1;
 603                                                         bigbuf = NULL;
 604                                                 }
 605                                         }
 606                                         break;
 607                                 }
 608                                 mid_entry->resp_buf = smb_buffer;
 609                                 if(isLargeBuf)
 610                                         mid_entry->largeBuf = 1;
 611                                 else
 612                                         mid_entry->largeBuf = 0;
 613 multi_t2_fnd:
 614                                 task_to_wake = mid_entry->tsk;
 615                                 mid_entry->midState = MID_RESPONSE_RECEIVED;
 616 #ifdef CONFIG_CIFS_STATS2
 617                                 mid_entry->when_received = jiffies;
 618 #endif
 619                                 break;
 620                         }
 621                 }
 622                 spin_unlock(&GlobalMid_Lock);
 623                 if (task_to_wake) {
 624                         /* Was previous buf put in mpx struct for multi-rsp? */
 625                         if(!isMultiRsp) {
 626                                 /* smb buffer will be freed by user thread */
 627                                 if(isLargeBuf) {
 628                                         bigbuf = NULL;
 629                                 } else
 630                                         smallbuf = NULL;
 631                         }
 632                         wake_up_process(task_to_wake);
 633                 } else if ((is_valid_oplock_break(smb_buffer) == FALSE)
 634                     && (isMultiRsp == FALSE)) {
 635                         cERROR(1, ("No task to wake, unknown frame rcvd!"));
 636                         cifs_dump_mem("Received Data is: ",(char *)smb_buffer,
 637                                       sizeof(struct smb_hdr));
 638                 }
 639         } /* end while !EXITING */
 640
 641         spin_lock(&GlobalMid_Lock);
 642         server->tcpStatus = CifsExiting;
 643         server->tsk = NULL;
 644         /* check if we have blocked requests that need to free */
 645         /* Note that cifs_max_pending is normally 50, but
 646         can be set at module install time to as little as two */
 647         if(atomic_read(&server->inFlight) >= cifs_max_pending)
 648                 atomic_set(&server->inFlight, cifs_max_pending - 1);
 649         /* We do not want to set the max_pending too low or we
 650         could end up with the counter going negative */
 651         spin_unlock(&GlobalMid_Lock);
 652         /* Although there should not be any requests blocked on
 653         this queue it can not hurt to be paranoid and try to wake up requests
 654         that may haven been blocked when more than 50 at time were on the wire
 655         to the same server - they now will see the session is in exit state
 656         and get out of SendReceive.  */
 657         wake_up_all(&server->request_q);
 658         /* give those requests time to exit */
 659         msleep(125);
 660
 661         if(server->ssocket) {
 662                 sock_release(csocket);
 663                 server->ssocket = NULL;
 664         }
 665         /* buffer usuallly freed in free_mid - need to free it here on exit */
 666         if (bigbuf != NULL)
 667                 cifs_buf_release(bigbuf);
 668         if (smallbuf != NULL)
 669                 cifs_small_buf_release(smallbuf);
 670
 671         read_lock(&GlobalSMBSeslock);
 672         if (list_empty(&server->pending_mid_q)) {
 673                 /* loop through server session structures attached to this and
 674                     mark them dead */
 675                 list_for_each(tmp, &GlobalSMBSessionList) {
 676                         ses =
 677                             list_entry(tmp, struct cifsSesInfo,
 678                                        cifsSessionList);
 679                         if (ses->server == server) {
 680                                 ses->status = CifsExiting;
 681                                 ses->server = NULL;
 682                         }
 683                 }
 684                 read_unlock(&GlobalSMBSeslock);
 685         } else {
 686                 /* although we can not zero the server struct pointer yet,
 687                 since there are active requests which may depnd on them,
 688                 mark the corresponding SMB sessions as exiting too */
 689                 list_for_each(tmp, &GlobalSMBSessionList) {
 690                         ses = list_entry(tmp, struct cifsSesInfo,
 691                                          cifsSessionList);
 692                         if (ses->server == server) {
 693                                 ses->status = CifsExiting;
 694                         }
 695                 }
 696
 697                 spin_lock(&GlobalMid_Lock);
 698                 list_for_each(tmp, &server->pending_mid_q) {
 699                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 700                         if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
 701                                 cFYI(1,
 702                                   ("Clearing Mid 0x%x - waking up ",mid_entry->mid));
 703                                 task_to_wake = mid_entry->tsk;
 704                                 if(task_to_wake) {
 705                                         wake_up_process(task_to_wake);
 706                                 }
 707                         }
 708                 }
 709                 spin_unlock(&GlobalMid_Lock);
 710                 read_unlock(&GlobalSMBSeslock);
 711                 /* 1/8th of sec is more than enough time for them to exit */
 712                 msleep(125);
 713         }
 714
 715         if (!list_empty(&server->pending_mid_q)) {
 716                 /* mpx threads have not exited yet give them
 717                 at least the smb send timeout time for long ops */
 718                 /* due to delays on oplock break requests, we need
 719                 to wait at least 45 seconds before giving up
 720                 on a request getting a response and going ahead
 721                 and killing cifsd */
 722                 cFYI(1, ("Wait for exit from demultiplex thread"));
 723                 msleep(46000);
 724                 /* if threads still have not exited they are probably never
 725                 coming home not much else we can do but free the memory */
 726         }
 727
 728         write_lock(&GlobalSMBSeslock);
 729         atomic_dec(&tcpSesAllocCount);
 730         length = tcpSesAllocCount.counter;
 731
 732         /* last chance to mark ses pointers invalid
 733         if there are any pointing to this (e.g
 734         if a crazy root user tried to kill cifsd
 735         kernel thread explicitly this might happen) */
 736         list_for_each(tmp, &GlobalSMBSessionList) {
 737                 ses = list_entry(tmp, struct cifsSesInfo,
 738                                 cifsSessionList);
 739                 if (ses->server == server) {
 740                         ses->server = NULL;
 741                 }
 742         }
 743         write_unlock(&GlobalSMBSeslock);
 744
 745         kfree(server);
 746         if(length  > 0) {
 747                 mempool_resize(cifs_req_poolp,
 748                         length + cifs_min_rcv,
 749                         GFP_KERNEL);
 750         }
 751
 752         complete_and_exit(&cifsd_complete, 0);
 753         return 0;
 754 }
 755
 756 static int
 757 cifs_parse_mount_options(char *options, const char *devname,struct smb_vol *vol)
 758 {
 759         char *value;
 760         char *data;
 761         unsigned int  temp_len, i, j;
 762         char separator[2];
 763
 764         separator[0] = ',';
 765         separator[1] = 0;
 766
 767         memset(vol->source_rfc1001_name,0x20,15);
 768         for(i=0;i < strnlen(system_utsname.nodename,15);i++) {
 769                 /* does not have to be a perfect mapping since the field is
 770                 informational, only used for servers that do not support
 771                 port 445 and it can be overridden at mount time */
 772                 vol->source_rfc1001_name[i] =
 773                         toupper(system_utsname.nodename[i]);
 774         }
 775         vol->source_rfc1001_name[15] = 0;
 776         /* null target name indicates to use *SMBSERVR default called name
 777            if we end up sending RFC1001 session initialize */
 778         vol->target_rfc1001_name[0] = 0;
 779         vol->linux_uid = current->uid;  /* current->euid instead? */
 780         vol->linux_gid = current->gid;
 781         vol->dir_mode = S_IRWXUGO;
 782         /* 2767 perms indicate mandatory locking support */
 783         vol->file_mode = S_IALLUGO & ~(S_ISUID | S_IXGRP);
 784
 785         /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
 786         vol->rw = TRUE;
 787         vol->ntlm = 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->sign = 1;
 919                                 vol->krb5 = 1;
 920                         } else if (strnicmp(value, "krb5p", 5) == 0) {
 921                                 /* vol->seal = 1;
 922                                    vol->krb5 = 1; */
 923                                 cERROR(1,("Krb5 cifs privacy not supported"));
 924                                 return 1;
 925                         } else if (strnicmp(value, "krb5", 4) == 0) {
 926                                 vol->krb5 = 1;
 927                         } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
 928                                 vol->ntlmv2 = 1;
 929                                 vol->sign = 1;
 930                         } else if (strnicmp(value, "ntlmv2", 6) == 0) {
 931                                 vol->ntlmv2 = 1;
 932                         } else if (strnicmp(value, "ntlmi", 5) == 0) {
 933                                 vol->ntlm = 1;
 934                                 vol->sign = 1;
 935                         } else if (strnicmp(value, "ntlm", 4) == 0) {
 936                                 /* ntlm is default so can be turned off too */
 937                                 vol->ntlm = 1;
 938                         } else if (strnicmp(value, "nontlm", 6) == 0) {
 939                                 vol->ntlm = 0;
 940                         } else if (strnicmp(value, "none", 4) == 0) {
 941                                 vol->nullauth = 1;
 942                         } else {
 943                                 cERROR(1,("bad security option: %s", value));
 944                                 return 1;
 945                         }
 946                 } else if ((strnicmp(data, "unc", 3) == 0)
 947                            || (strnicmp(data, "target", 6) == 0)
 948                            || (strnicmp(data, "path", 4) == 0)) {
 949                         if (!value || !*value) {
 950                                 printk(KERN_WARNING
 951                                        "CIFS: invalid path to network resource\n");
 952                                 return 1;       /* needs_arg; */
 953                         }
 954                         if ((temp_len = strnlen(value, 300)) < 300) {
 955                                 vol->UNC = kmalloc(temp_len+1,GFP_KERNEL);
 956                                 if(vol->UNC == NULL)
 957                                         return 1;
 958                                 strcpy(vol->UNC,value);
 959                                 if (strncmp(vol->UNC, "//", 2) == 0) {
 960                                         vol->UNC[0] = '\\';
 961                                         vol->UNC[1] = '\\';
 962                                 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
 963                                         printk(KERN_WARNING
 964                                                "CIFS: UNC Path does not begin with // or \\\\ \n");
 965                                         return 1;
 966                                 }
 967                         } else {
 968                                 printk(KERN_WARNING "CIFS: UNC name too long\n");
 969                                 return 1;
 970                         }
 971                 } else if ((strnicmp(data, "domain", 3) == 0)
 972                            || (strnicmp(data, "workgroup", 5) == 0)) {
 973                         if (!value || !*value) {
 974                                 printk(KERN_WARNING "CIFS: invalid domain name\n");
 975                                 return 1;       /* needs_arg; */
 976                         }
 977                         /* BB are there cases in which a comma can be valid in
 978                         a domain name and need special handling? */
 979                         if (strnlen(value, 65) < 65) {
 980                                 vol->domainname = value;
 981                                 cFYI(1, ("Domain name set"));
 982                         } else {
 983                                 printk(KERN_WARNING "CIFS: domain name too long\n");
 984                                 return 1;
 985                         }
 986                 } else if (strnicmp(data, "iocharset", 9) == 0) {
 987                         if (!value || !*value) {
 988                                 printk(KERN_WARNING "CIFS: invalid iocharset specified\n");
 989                                 return 1;       /* needs_arg; */
 990                         }
 991                         if (strnlen(value, 65) < 65) {
 992                                 if(strnicmp(value,"default",7))
 993                                         vol->iocharset = value;
 994                                 /* if iocharset not set load_nls_default used by caller */
 995                                 cFYI(1, ("iocharset set to %s",value));
 996                         } else {
 997                                 printk(KERN_WARNING "CIFS: iocharset name too long.\n");
 998                                 return 1;
 999                         }
1000                 } else if (strnicmp(data, "uid", 3) == 0) {
1001                         if (value && *value) {
1002                                 vol->linux_uid =
1003                                         simple_strtoul(value, &value, 0);
1004                         }
1005                 } else if (strnicmp(data, "gid", 3) == 0) {
1006                         if (value && *value) {
1007                                 vol->linux_gid =
1008                                         simple_strtoul(value, &value, 0);
1009                         }
1010                 } else if (strnicmp(data, "file_mode", 4) == 0) {
1011                         if (value && *value) {
1012                                 vol->file_mode =
1013                                         simple_strtoul(value, &value, 0);
1014                         }
1015                 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1016                         if (value && *value) {
1017                                 vol->dir_mode =
1018                                         simple_strtoul(value, &value, 0);
1019                         }
1020                 } else if (strnicmp(data, "dirmode", 4) == 0) {
1021                         if (value && *value) {
1022                                 vol->dir_mode =
1023                                         simple_strtoul(value, &value, 0);
1024                         }
1025                 } else if (strnicmp(data, "port", 4) == 0) {
1026                         if (value && *value) {
1027                                 vol->port =
1028                                         simple_strtoul(value, &value, 0);
1029                         }
1030                 } else if (strnicmp(data, "rsize", 5) == 0) {
1031                         if (value && *value) {
1032                                 vol->rsize =
1033                                         simple_strtoul(value, &value, 0);
1034                         }
1035                 } else if (strnicmp(data, "wsize", 5) == 0) {
1036                         if (value && *value) {
1037                                 vol->wsize =
1038                                         simple_strtoul(value, &value, 0);
1039                         }
1040                 } else if (strnicmp(data, "sockopt", 5) == 0) {
1041                         if (value && *value) {
1042                                 vol->sockopt =
1043                                         simple_strtoul(value, &value, 0);
1044                         }
1045                 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1046                         if (!value || !*value || (*value == ' ')) {
1047                                 cFYI(1,("invalid (empty) netbiosname specified"));
1048                         } else {
1049                                 memset(vol->source_rfc1001_name,0x20,15);
1050                                 for(i=0;i<15;i++) {
1051                                 /* BB are there cases in which a comma can be
1052                                 valid in this workstation netbios name (and need
1053                                 special handling)? */
1054
1055                                 /* We do not uppercase netbiosname for user */
1056                                         if (value[i]==0)
1057                                                 break;
1058                                         else
1059                                                 vol->source_rfc1001_name[i] = value[i];
1060                                 }
1061                                 /* The string has 16th byte zero still from
1062                                 set at top of the function  */
1063                                 if((i==15) && (value[i] != 0))
1064                                         printk(KERN_WARNING "CIFS: netbiosname longer than 15 truncated.\n");
1065                         }
1066                 } else if (strnicmp(data, "servern", 7) == 0) {
1067                         /* servernetbiosname specified override *SMBSERVER */
1068                         if (!value || !*value || (*value == ' ')) {
1069                                 cFYI(1,("empty server netbiosname specified"));
1070                         } else {
1071                                 /* last byte, type, is 0x20 for servr type */
1072                                 memset(vol->target_rfc1001_name,0x20,16);
1073
1074                                 for(i=0;i<15;i++) {
1075                                 /* BB are there cases in which a comma can be
1076                                    valid in this workstation netbios name (and need
1077                                    special handling)? */
1078
1079                                 /* user or mount helper must uppercase netbiosname */
1080                                         if (value[i]==0)
1081                                                 break;
1082                                         else
1083                                                 vol->target_rfc1001_name[i] = value[i];
1084                                 }
1085                                 /* The string has 16th byte zero still from
1086                                    set at top of the function  */
1087                                 if((i==15) && (value[i] != 0))
1088                                         printk(KERN_WARNING "CIFS: server netbiosname longer than 15 truncated.\n");
1089                         }
1090                 } else if (strnicmp(data, "credentials", 4) == 0) {
1091                         /* ignore */
1092                 } else if (strnicmp(data, "version", 3) == 0) {
1093                         /* ignore */
1094                 } else if (strnicmp(data, "guest",5) == 0) {
1095                         /* ignore */
1096                 } else if (strnicmp(data, "rw", 2) == 0) {
1097                         vol->rw = TRUE;
1098                 } else if ((strnicmp(data, "suid", 4) == 0) ||
1099                                    (strnicmp(data, "nosuid", 6) == 0) ||
1100                                    (strnicmp(data, "exec", 4) == 0) ||
1101                                    (strnicmp(data, "noexec", 6) == 0) ||
1102                                    (strnicmp(data, "nodev", 5) == 0) ||
1103                                    (strnicmp(data, "noauto", 6) == 0) ||
1104                                    (strnicmp(data, "dev", 3) == 0)) {
1105                         /*  The mount tool or mount.cifs helper (if present)
1106                                 uses these opts to set flags, and the flags are read
1107                                 by the kernel vfs layer before we get here (ie
1108                                 before read super) so there is no point trying to
1109                                 parse these options again and set anything and it
1110                                 is ok to just ignore them */
1111                         continue;
1112                 } else if (strnicmp(data, "ro", 2) == 0) {
1113                         vol->rw = FALSE;
1114                 } else if (strnicmp(data, "hard", 4) == 0) {
1115                         vol->retry = 1;
1116                 } else if (strnicmp(data, "soft", 4) == 0) {
1117                         vol->retry = 0;
1118                 } else if (strnicmp(data, "perm", 4) == 0) {
1119                         vol->noperm = 0;
1120                 } else if (strnicmp(data, "noperm", 6) == 0) {
1121                         vol->noperm = 1;
1122                 } else if (strnicmp(data, "mapchars", 8) == 0) {
1123                         vol->remap = 1;
1124                 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1125                         vol->remap = 0;
1126                 } else if (strnicmp(data, "sfu", 3) == 0) {
1127                         vol->sfu_emul = 1;
1128                 } else if (strnicmp(data, "nosfu", 5) == 0) {
1129                         vol->sfu_emul = 0;
1130                 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1131                         vol->posix_paths = 1;
1132                 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1133                         vol->posix_paths = 0;
1134                 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1135                            (strnicmp(data, "ignorecase", 10)  == 0)) {
1136                         vol->nocase = 1;
1137                 } else if (strnicmp(data, "brl", 3) == 0) {
1138                         vol->nobrl =  0;
1139                 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1140                            (strnicmp(data, "nolock", 6) == 0)) {
1141                         vol->nobrl =  1;
1142                         /* turn off mandatory locking in mode
1143                         if remote locking is turned off since the
1144                         local vfs will do advisory */
1145                         if(vol->file_mode == (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1146                                 vol->file_mode = S_IALLUGO;
1147                 } else if (strnicmp(data, "setuids", 7) == 0) {
1148                         vol->setuids = 1;
1149                 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1150                         vol->setuids = 0;
1151                 } else if (strnicmp(data, "nohard", 6) == 0) {
1152                         vol->retry = 0;
1153                 } else if (strnicmp(data, "nosoft", 6) == 0) {
1154                         vol->retry = 1;
1155                 } else if (strnicmp(data, "nointr", 6) == 0) {
1156                         vol->intr = 0;
1157                 } else if (strnicmp(data, "intr", 4) == 0) {
1158                         vol->intr = 1;
1159                 } else if (strnicmp(data, "serverino",7) == 0) {
1160                         vol->server_ino = 1;
1161                 } else if (strnicmp(data, "noserverino",9) == 0) {
1162                         vol->server_ino = 0;
1163                 } else if (strnicmp(data, "cifsacl",7) == 0) {
1164                         vol->cifs_acl = 1;
1165                 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1166                         vol->cifs_acl = 0;
1167                 } else if (strnicmp(data, "acl",3) == 0) {
1168                         vol->no_psx_acl = 0;
1169                 } else if (strnicmp(data, "noacl",5) == 0) {
1170                         vol->no_psx_acl = 1;
1171                 } else if (strnicmp(data, "direct",6) == 0) {
1172                         vol->direct_io = 1;
1173                 } else if (strnicmp(data, "forcedirectio",13) == 0) {
1174                         vol->direct_io = 1;
1175                 } else if (strnicmp(data, "in6_addr",8) == 0) {
1176                         if (!value || !*value) {
1177                                 vol->in6_addr = NULL;
1178                         } else if (strnlen(value, 49) == 48) {
1179                                 vol->in6_addr = value;
1180                         } else {
1181                                 printk(KERN_WARNING "CIFS: ip v6 address not 48 characters long\n");
1182                                 return 1;
1183                         }
1184                 } else if (strnicmp(data, "noac", 4) == 0) {
1185                         printk(KERN_WARNING "CIFS: Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n");
1186                 } else
1187                         printk(KERN_WARNING "CIFS: Unknown mount option %s\n",data);
1188         }
1189         if (vol->UNC == NULL) {
1190                 if(devname == NULL) {
1191                         printk(KERN_WARNING "CIFS: Missing UNC name for mount target\n");
1192                         return 1;
1193                 }
1194                 if ((temp_len = strnlen(devname, 300)) < 300) {
1195                         vol->UNC = kmalloc(temp_len+1,GFP_KERNEL);
1196                         if(vol->UNC == NULL)
1197                                 return 1;
1198                         strcpy(vol->UNC,devname);
1199                         if (strncmp(vol->UNC, "//", 2) == 0) {
1200                                 vol->UNC[0] = '\\';
1201                                 vol->UNC[1] = '\\';
1202                         } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1203                                 printk(KERN_WARNING "CIFS: UNC Path does not begin with // or \\\\ \n");
1204                                 return 1;
1205                         }
1206                 } else {
1207                         printk(KERN_WARNING "CIFS: UNC name too long\n");
1208                         return 1;
1209                 }
1210         }
1211         if(vol->UNCip == NULL)
1212                 vol->UNCip = &vol->UNC[2];
1213
1214         return 0;
1215 }
1216
1217 static struct cifsSesInfo *
1218 cifs_find_tcp_session(struct in_addr * target_ip_addr,
1219                 struct in6_addr *target_ip6_addr,
1220                  char *userName, struct TCP_Server_Info **psrvTcp)
1221 {
1222         struct list_head *tmp;
1223         struct cifsSesInfo *ses;
1224         *psrvTcp = NULL;
1225         read_lock(&GlobalSMBSeslock);
1226
1227         list_for_each(tmp, &GlobalSMBSessionList) {
1228                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
1229                 if (ses->server) {
1230                         if((target_ip_addr &&
1231                                 (ses->server->addr.sockAddr.sin_addr.s_addr
1232                                   == target_ip_addr->s_addr)) || (target_ip6_addr
1233                                 && memcmp(&ses->server->addr.sockAddr6.sin6_addr,
1234                                         target_ip6_addr,sizeof(*target_ip6_addr)))){
1235                                 /* BB lock server and tcp session and increment use count here?? */
1236                                 *psrvTcp = ses->server; /* found a match on the TCP session */
1237                                 /* BB check if reconnection needed */
1238                                 if (strncmp
1239                                     (ses->userName, userName,
1240                                      MAX_USERNAME_SIZE) == 0){
1241                                         read_unlock(&GlobalSMBSeslock);
1242                                         return ses;     /* found exact match on both tcp and SMB sessions */
1243                                 }
1244                         }
1245                 }
1246                 /* else tcp and smb sessions need reconnection */
1247         }
1248         read_unlock(&GlobalSMBSeslock);
1249         return NULL;
1250 }
1251
1252 static struct cifsTconInfo *
1253 find_unc(__be32 new_target_ip_addr, char *uncName, char *userName)
1254 {
1255         struct list_head *tmp;
1256         struct cifsTconInfo *tcon;
1257
1258         read_lock(&GlobalSMBSeslock);
1259         list_for_each(tmp, &GlobalTreeConnectionList) {
1260                 cFYI(1, ("Next tcon - "));
1261                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
1262                 if (tcon->ses) {
1263                         if (tcon->ses->server) {
1264                                 cFYI(1,
1265                                      (" old ip addr: %x == new ip %x ?",
1266                                       tcon->ses->server->addr.sockAddr.sin_addr.
1267                                       s_addr, new_target_ip_addr));
1268                                 if (tcon->ses->server->addr.sockAddr.sin_addr.
1269                                     s_addr == new_target_ip_addr) {
1270         /* BB lock tcon and server and tcp session and increment use count here? */
1271                                         /* found a match on the TCP session */
1272                                         /* BB check if reconnection needed */
1273                                         cFYI(1,("Matched ip, old UNC: %s == new: %s ?",
1274                                               tcon->treeName, uncName));
1275                                         if (strncmp
1276                                             (tcon->treeName, uncName,
1277                                              MAX_TREE_SIZE) == 0) {
1278                                                 cFYI(1,
1279                                                      ("Matched UNC, old user: %s == new: %s ?",
1280                                                       tcon->treeName, uncName));
1281                                                 if (strncmp
1282                                                     (tcon->ses->userName,
1283                                                      userName,
1284                                                      MAX_USERNAME_SIZE) == 0) {
1285                                                         read_unlock(&GlobalSMBSeslock);
1286                                                         return tcon;/* also matched user (smb session)*/
1287                                                 }
1288                                         }
1289                                 }
1290                         }
1291                 }
1292         }
1293         read_unlock(&GlobalSMBSeslock);
1294         return NULL;
1295 }
1296
1297 int
1298 connect_to_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1299                     const char *old_path, const struct nls_table *nls_codepage,
1300                     int remap)
1301 {
1302         unsigned char *referrals = NULL;
1303         unsigned int num_referrals;
1304         int rc = 0;
1305
1306         rc = get_dfs_path(xid, pSesInfo,old_path, nls_codepage,
1307                         &num_referrals, &referrals, remap);
1308
1309         /* BB Add in code to: if valid refrl, if not ip address contact
1310                 the helper that resolves tcp names, mount to it, try to
1311                 tcon to it unmount it if fail */
1312
1313         kfree(referrals);
1314
1315         return rc;
1316 }
1317
1318 int
1319 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1320                         const char *old_path, const struct nls_table *nls_codepage,
1321                         unsigned int *pnum_referrals,
1322                         unsigned char ** preferrals, int remap)
1323 {
1324         char *temp_unc;
1325         int rc = 0;
1326
1327         *pnum_referrals = 0;
1328
1329         if (pSesInfo->ipc_tid == 0) {
1330                 temp_unc = kmalloc(2 /* for slashes */ +
1331                         strnlen(pSesInfo->serverName,SERVER_NAME_LEN_WITH_NULL * 2)
1332                                  + 1 + 4 /* slash IPC$ */  + 2,
1333                                 GFP_KERNEL);
1334                 if (temp_unc == NULL)
1335                         return -ENOMEM;
1336                 temp_unc[0] = '\\';
1337                 temp_unc[1] = '\\';
1338                 strcpy(temp_unc + 2, pSesInfo->serverName);
1339                 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1340                 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1341                 cFYI(1,
1342                      ("CIFS Tcon rc = %d ipc_tid = %d", rc,pSesInfo->ipc_tid));
1343                 kfree(temp_unc);
1344         }
1345         if (rc == 0)
1346                 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1347                                      pnum_referrals, nls_codepage, remap);
1348
1349         return rc;
1350 }
1351
1352 /* See RFC1001 section 14 on representation of Netbios names */
1353 static void rfc1002mangle(char * target,char * source, unsigned int length)
1354 {
1355         unsigned int i,j;
1356
1357         for(i=0,j=0;i<(length);i++) {
1358                 /* mask a nibble at a time and encode */
1359                 target[j] = 'A' + (0x0F & (source[i] >> 4));
1360                 target[j+1] = 'A' + (0x0F & source[i]);
1361                 j+=2;
1362         }
1363
1364 }
1365
1366
1367 static int
1368 ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
1369              char * netbios_name, char * target_name)
1370 {
1371         int rc = 0;
1372         int connected = 0;
1373         __be16 orig_port = 0;
1374
1375         if(*csocket == NULL) {
1376                 rc = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, csocket);
1377                 if (rc < 0) {
1378                         cERROR(1, ("Error %d creating socket",rc));
1379                         *csocket = NULL;
1380                         return rc;
1381                 } else {
1382                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1383                         cFYI(1,("Socket created"));
1384                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1385                 }
1386         }
1387
1388         psin_server->sin_family = AF_INET;
1389         if(psin_server->sin_port) { /* user overrode default port */
1390                 rc = (*csocket)->ops->connect(*csocket,
1391                                 (struct sockaddr *) psin_server,
1392                                 sizeof (struct sockaddr_in),0);
1393                 if (rc >= 0)
1394                         connected = 1;
1395         }
1396
1397         if(!connected) {
1398                 /* save original port so we can retry user specified port
1399                         later if fall back ports fail this time  */
1400                 orig_port = psin_server->sin_port;
1401
1402                 /* do not retry on the same port we just failed on */
1403                 if(psin_server->sin_port != htons(CIFS_PORT)) {
1404                         psin_server->sin_port = htons(CIFS_PORT);
1405
1406                         rc = (*csocket)->ops->connect(*csocket,
1407                                         (struct sockaddr *) psin_server,
1408                                         sizeof (struct sockaddr_in),0);
1409                         if (rc >= 0)
1410                                 connected = 1;
1411                 }
1412         }
1413         if (!connected) {
1414                 psin_server->sin_port = htons(RFC1001_PORT);
1415                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1416                                               psin_server, sizeof (struct sockaddr_in),0);
1417                 if (rc >= 0)
1418                         connected = 1;
1419         }
1420
1421         /* give up here - unless we want to retry on different
1422                 protocol families some day */
1423         if (!connected) {
1424                 if(orig_port)
1425                         psin_server->sin_port = orig_port;
1426                 cFYI(1,("Error %d connecting to server via ipv4",rc));
1427                 sock_release(*csocket);
1428                 *csocket = NULL;
1429                 return rc;
1430         }
1431         /* Eventually check for other socket options to change from
1432                 the default. sock_setsockopt not used because it expects
1433                 user space buffer */
1434          cFYI(1,("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",(*csocket)->sk->sk_sndbuf,
1435                  (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
1436         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1437         /* make the bufsizes depend on wsize/rsize and max requests */
1438         if((*csocket)->sk->sk_sndbuf < (200 * 1024))
1439                 (*csocket)->sk->sk_sndbuf = 200 * 1024;
1440         if((*csocket)->sk->sk_rcvbuf < (140 * 1024))
1441                 (*csocket)->sk->sk_rcvbuf = 140 * 1024;
1442
1443         /* send RFC1001 sessinit */
1444         if(psin_server->sin_port == htons(RFC1001_PORT)) {
1445                 /* some servers require RFC1001 sessinit before sending
1446                 negprot - BB check reconnection in case where second
1447                 sessinit is sent but no second negprot */
1448                 struct rfc1002_session_packet * ses_init_buf;
1449                 struct smb_hdr * smb_buf;
1450                 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), GFP_KERNEL);
1451                 if(ses_init_buf) {
1452                         ses_init_buf->trailer.session_req.called_len = 32;
1453                         if(target_name && (target_name[0] != 0)) {
1454                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1455                                         target_name, 16);
1456                         } else {
1457                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1458                                         DEFAULT_CIFS_CALLED_NAME,16);
1459                         }
1460
1461                         ses_init_buf->trailer.session_req.calling_len = 32;
1462                         /* calling name ends in null (byte 16) from old smb
1463                         convention. */
1464                         if(netbios_name && (netbios_name[0] !=0)) {
1465                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1466                                         netbios_name,16);
1467                         } else {
1468                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1469                                         "LINUX_CIFS_CLNT",16);
1470                         }
1471                         ses_init_buf->trailer.session_req.scope1 = 0;
1472                         ses_init_buf->trailer.session_req.scope2 = 0;
1473                         smb_buf = (struct smb_hdr *)ses_init_buf;
1474                         /* sizeof RFC1002_SESSION_REQUEST with no scope */
1475                         smb_buf->smb_buf_length = 0x81000044;
1476                         rc = smb_send(*csocket, smb_buf, 0x44,
1477                                 (struct sockaddr *)psin_server);
1478                         kfree(ses_init_buf);
1479                 }
1480                 /* else the negprot may still work without this
1481                 even though malloc failed */
1482
1483         }
1484
1485         return rc;
1486 }
1487
1488 static int
1489 ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
1490 {
1491         int rc = 0;
1492         int connected = 0;
1493         __be16 orig_port = 0;
1494
1495         if(*csocket == NULL) {
1496                 rc = sock_create_kern(PF_INET6, SOCK_STREAM, IPPROTO_TCP, csocket);
1497                 if (rc < 0) {
1498                         cERROR(1, ("Error %d creating ipv6 socket",rc));
1499                         *csocket = NULL;
1500                         return rc;
1501                 } else {
1502                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1503                          cFYI(1,("ipv6 Socket created"));
1504                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1505                 }
1506         }
1507
1508         psin_server->sin6_family = AF_INET6;
1509
1510         if(psin_server->sin6_port) { /* user overrode default port */
1511                 rc = (*csocket)->ops->connect(*csocket,
1512                                 (struct sockaddr *) psin_server,
1513                                 sizeof (struct sockaddr_in6),0);
1514                 if (rc >= 0)
1515                         connected = 1;
1516         }
1517
1518         if(!connected) {
1519                 /* save original port so we can retry user specified port
1520                         later if fall back ports fail this time  */
1521
1522                 orig_port = psin_server->sin6_port;
1523                 /* do not retry on the same port we just failed on */
1524                 if(psin_server->sin6_port != htons(CIFS_PORT)) {
1525                         psin_server->sin6_port = htons(CIFS_PORT);
1526
1527                         rc = (*csocket)->ops->connect(*csocket,
1528                                         (struct sockaddr *) psin_server,
1529                                         sizeof (struct sockaddr_in6),0);
1530                         if (rc >= 0)
1531                                 connected = 1;
1532                 }
1533         }
1534         if (!connected) {
1535                 psin_server->sin6_port = htons(RFC1001_PORT);
1536                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1537                                          psin_server, sizeof (struct sockaddr_in6),0);
1538                 if (rc >= 0)
1539                         connected = 1;
1540         }
1541
1542         /* give up here - unless we want to retry on different
1543                 protocol families some day */
1544         if (!connected) {
1545                 if(orig_port)
1546                         psin_server->sin6_port = orig_port;
1547                 cFYI(1,("Error %d connecting to server via ipv6",rc));
1548                 sock_release(*csocket);
1549                 *csocket = NULL;
1550                 return rc;
1551         }
1552         /* Eventually check for other socket options to change from
1553                 the default. sock_setsockopt not used because it expects
1554                 user space buffer */
1555         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1556
1557         return rc;
1558 }
1559
1560 int
1561 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
1562            char *mount_data, const char *devname)
1563 {
1564         int rc = 0;
1565         int xid;
1566         int address_type = AF_INET;
1567         struct socket *csocket = NULL;
1568         struct sockaddr_in sin_server;
1569         struct sockaddr_in6 sin_server6;
1570         struct smb_vol volume_info;
1571         struct cifsSesInfo *pSesInfo = NULL;
1572         struct cifsSesInfo *existingCifsSes = NULL;
1573         struct cifsTconInfo *tcon = NULL;
1574         struct TCP_Server_Info *srvTcp = NULL;
1575
1576         xid = GetXid();
1577
1578 /* cFYI(1, ("Entering cifs_mount. Xid: %d with: %s", xid, mount_data)); */
1579
1580         memset(&volume_info,0,sizeof(struct smb_vol));
1581         if (cifs_parse_mount_options(mount_data, devname, &volume_info)) {
1582                 kfree(volume_info.UNC);
1583                 kfree(volume_info.password);
1584                 FreeXid(xid);
1585                 return -EINVAL;
1586         }
1587
1588         if (volume_info.username) {
1589                 /* BB fixme parse for domain name here */
1590                 cFYI(1, ("Username: %s ", volume_info.username));
1591
1592         } else {
1593                 cifserror("No username specified");
1594         /* In userspace mount helper we can get user name from alternate
1595            locations such as env variables and files on disk */
1596                 kfree(volume_info.UNC);
1597                 kfree(volume_info.password);
1598                 FreeXid(xid);
1599                 return -EINVAL;
1600         }
1601
1602         if (volume_info.UNCip && volume_info.UNC) {
1603                 rc = cifs_inet_pton(AF_INET, volume_info.UNCip,&sin_server.sin_addr.s_addr);
1604
1605                 if(rc <= 0) {
1606                         /* not ipv4 address, try ipv6 */
1607                         rc = cifs_inet_pton(AF_INET6,volume_info.UNCip,&sin_server6.sin6_addr.in6_u);
1608                         if(rc > 0)
1609                                 address_type = AF_INET6;
1610                 } else {
1611                         address_type = AF_INET;
1612                 }
1613
1614                 if(rc <= 0) {
1615                         /* we failed translating address */
1616                         kfree(volume_info.UNC);
1617                         kfree(volume_info.password);
1618                         FreeXid(xid);
1619                         return -EINVAL;
1620                 }
1621
1622                 cFYI(1, ("UNC: %s ip: %s", volume_info.UNC, volume_info.UNCip));
1623                 /* success */
1624                 rc = 0;
1625         } else if (volume_info.UNCip){
1626                 /* BB using ip addr as server name connect to the DFS root below */
1627                 cERROR(1,("Connecting to DFS root not implemented yet"));
1628                 kfree(volume_info.UNC);
1629                 kfree(volume_info.password);
1630                 FreeXid(xid);
1631                 return -EINVAL;
1632         } else /* which servers DFS root would we conect to */ {
1633                 cERROR(1,
1634                        ("CIFS mount error: No UNC path (e.g. -o unc=//192.168.1.100/public) specified"));
1635                 kfree(volume_info.UNC);
1636                 kfree(volume_info.password);
1637                 FreeXid(xid);
1638                 return -EINVAL;
1639         }
1640
1641         /* this is needed for ASCII cp to Unicode converts */
1642         if(volume_info.iocharset == NULL) {
1643                 cifs_sb->local_nls = load_nls_default();
1644         /* load_nls_default can not return null */
1645         } else {
1646                 cifs_sb->local_nls = load_nls(volume_info.iocharset);
1647                 if(cifs_sb->local_nls == NULL) {
1648                         cERROR(1,("CIFS mount error: iocharset %s not found",volume_info.iocharset));
1649                         kfree(volume_info.UNC);
1650                         kfree(volume_info.password);
1651                         FreeXid(xid);
1652                         return -ELIBACC;
1653                 }
1654         }
1655
1656         if(address_type == AF_INET)
1657                 existingCifsSes = cifs_find_tcp_session(&sin_server.sin_addr,
1658                         NULL /* no ipv6 addr */,
1659                         volume_info.username, &srvTcp);
1660         else if(address_type == AF_INET6)
1661                 existingCifsSes = cifs_find_tcp_session(NULL /* no ipv4 addr */,
1662                         &sin_server6.sin6_addr,
1663                         volume_info.username, &srvTcp);
1664         else {
1665                 kfree(volume_info.UNC);
1666                 kfree(volume_info.password);
1667                 FreeXid(xid);
1668                 return -EINVAL;
1669         }
1670
1671
1672         if (srvTcp) {
1673                 cFYI(1, ("Existing tcp session with server found"));
1674         } else {        /* create socket */
1675                 if(volume_info.port)
1676                         sin_server.sin_port = htons(volume_info.port);
1677                 else
1678                         sin_server.sin_port = 0;
1679                 rc = ipv4_connect(&sin_server,&csocket,
1680                                   volume_info.source_rfc1001_name,
1681                                   volume_info.target_rfc1001_name);
1682                 if (rc < 0) {
1683                         cERROR(1,
1684                                ("Error connecting to IPv4 socket. Aborting operation"));
1685                         if(csocket != NULL)
1686                                 sock_release(csocket);
1687                         kfree(volume_info.UNC);
1688                         kfree(volume_info.password);
1689                         FreeXid(xid);
1690                         return rc;
1691                 }
1692
1693                 srvTcp = kmalloc(sizeof (struct TCP_Server_Info), GFP_KERNEL);
1694                 if (srvTcp == NULL) {
1695                         rc = -ENOMEM;
1696                         sock_release(csocket);
1697                         kfree(volume_info.UNC);
1698                         kfree(volume_info.password);
1699                         FreeXid(xid);
1700                         return rc;
1701                 } else {
1702                         memset(srvTcp, 0, sizeof (struct TCP_Server_Info));
1703                         memcpy(&srvTcp->addr.sockAddr, &sin_server, sizeof (struct sockaddr_in));
1704                         atomic_set(&srvTcp->inFlight,0);
1705                         /* BB Add code for ipv6 case too */
1706                         srvTcp->ssocket = csocket;
1707                         srvTcp->protocolType = IPV4;
1708                         init_waitqueue_head(&srvTcp->response_q);
1709                         init_waitqueue_head(&srvTcp->request_q);
1710                         INIT_LIST_HEAD(&srvTcp->pending_mid_q);
1711                         /* at this point we are the only ones with the pointer
1712                         to the struct since the kernel thread not created yet
1713                         so no need to spinlock this init of tcpStatus */
1714                         srvTcp->tcpStatus = CifsNew;
1715                         init_MUTEX(&srvTcp->tcpSem);
1716                         rc = (int)kernel_thread((void *)(void *)cifs_demultiplex_thread, srvTcp,
1717                                       CLONE_FS | CLONE_FILES | CLONE_VM);
1718                         if(rc < 0) {
1719                                 rc = -ENOMEM;
1720                                 sock_release(csocket);
1721                                 kfree(volume_info.UNC);
1722                                 kfree(volume_info.password);
1723                                 FreeXid(xid);
1724                                 return rc;
1725                         }
1726                         wait_for_completion(&cifsd_complete);
1727                         rc = 0;
1728                         memcpy(srvTcp->workstation_RFC1001_name, volume_info.source_rfc1001_name,16);
1729                         memcpy(srvTcp->server_RFC1001_name, volume_info.target_rfc1001_name,16);
1730                         srvTcp->sequence_number = 0;
1731                 }
1732         }
1733
1734         if (existingCifsSes) {
1735                 pSesInfo = existingCifsSes;
1736                 cFYI(1, ("Existing smb sess found"));
1737                 kfree(volume_info.password);
1738                 /* volume_info.UNC freed at end of function */
1739         } else if (!rc) {
1740                 cFYI(1, ("Existing smb sess not found"));
1741                 pSesInfo = sesInfoAlloc();
1742                 if (pSesInfo == NULL)
1743                         rc = -ENOMEM;
1744                 else {
1745                         pSesInfo->server = srvTcp;
1746                         sprintf(pSesInfo->serverName, "%u.%u.%u.%u",
1747                                 NIPQUAD(sin_server.sin_addr.s_addr));
1748                 }
1749
1750                 if (!rc){
1751                         /* volume_info.password freed at unmount */
1752                         if (volume_info.password)
1753                                 pSesInfo->password = volume_info.password;
1754                         if (volume_info.username)
1755                                 strncpy(pSesInfo->userName,
1756                                         volume_info.username,MAX_USERNAME_SIZE);
1757                         if (volume_info.domainname)
1758                                 strncpy(pSesInfo->domainName,
1759                                         volume_info.domainname,MAX_USERNAME_SIZE);
1760                         pSesInfo->linux_uid = volume_info.linux_uid;
1761                         down(&pSesInfo->sesSem);
1762                         rc = cifs_setup_session(xid,pSesInfo, cifs_sb->local_nls);
1763                         up(&pSesInfo->sesSem);
1764                         if(!rc)
1765                                 atomic_inc(&srvTcp->socketUseCount);
1766                 } else
1767                         kfree(volume_info.password);
1768         }
1769
1770         /* search for existing tcon to this server share */
1771         if (!rc) {
1772                 if(volume_info.rsize > CIFSMaxBufSize) {
1773                         cERROR(1,("rsize %d too large, using MaxBufSize",
1774                                 volume_info.rsize));
1775                         cifs_sb->rsize = CIFSMaxBufSize;
1776                 } else if((volume_info.rsize) && (volume_info.rsize <= CIFSMaxBufSize))
1777                         cifs_sb->rsize = volume_info.rsize;
1778                 else /* default */
1779                         cifs_sb->rsize = CIFSMaxBufSize;
1780
1781                 if(volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
1782                         cERROR(1,("wsize %d too large using 4096 instead",
1783                                   volume_info.wsize));
1784                         cifs_sb->wsize = 4096;
1785                 } else if(volume_info.wsize)
1786                         cifs_sb->wsize = volume_info.wsize;
1787                 else
1788                         cifs_sb->wsize =
1789                                 min(PAGEVEC_SIZE * PAGE_CACHE_SIZE, 127*1024);
1790                         /* old default of CIFSMaxBufSize was too small now
1791                            that SMB Write2 can send multiple pages in kvec.
1792                            RFC1001 does not describe what happens when frame
1793                            bigger than 128K is sent so use that as max in
1794                            conjunction with 52K kvec constraint on arch with 4K
1795                            page size  */
1796
1797                 if(cifs_sb->rsize < PAGE_CACHE_SIZE) {
1798                         cifs_sb->rsize = PAGE_CACHE_SIZE;
1799                         /* Windows ME does this */
1800                         cFYI(1,("Attempt to set readsize for mount to less than one page (4096)"));
1801                 }
1802                 cifs_sb->mnt_uid = volume_info.linux_uid;
1803                 cifs_sb->mnt_gid = volume_info.linux_gid;
1804                 cifs_sb->mnt_file_mode = volume_info.file_mode;
1805                 cifs_sb->mnt_dir_mode = volume_info.dir_mode;
1806                 cFYI(1,("file mode: 0x%x  dir mode: 0x%x",
1807                         cifs_sb->mnt_file_mode,cifs_sb->mnt_dir_mode));
1808
1809                 if(volume_info.noperm)
1810                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
1811                 if(volume_info.setuids)
1812                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
1813                 if(volume_info.server_ino)
1814                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
1815                 if(volume_info.remap)
1816                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
1817                 if(volume_info.no_xattr)
1818                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
1819                 if(volume_info.sfu_emul)
1820                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
1821                 if(volume_info.nobrl)
1822                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
1823                 if(volume_info.cifs_acl)
1824                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
1825
1826                 if(volume_info.direct_io) {
1827                         cFYI(1,("mounting share using direct i/o"));
1828                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
1829                 }
1830
1831                 tcon =
1832                     find_unc(sin_server.sin_addr.s_addr, volume_info.UNC,
1833                              volume_info.username);
1834                 if (tcon) {
1835                         cFYI(1, ("Found match on UNC path"));
1836                         /* we can have only one retry value for a connection
1837                            to a share so for resources mounted more than once
1838                            to the same server share the last value passed in
1839                            for the retry flag is used */
1840                         tcon->retry = volume_info.retry;
1841                         tcon->nocase = volume_info.nocase;
1842                 } else {
1843                         tcon = tconInfoAlloc();
1844                         if (tcon == NULL)
1845                                 rc = -ENOMEM;
1846                         else {
1847                                 /* check for null share name ie connect to dfs root */
1848
1849                                 /* BB check if this works for exactly length three strings */
1850                                 if ((strchr(volume_info.UNC + 3, '\\') == NULL)
1851                                     && (strchr(volume_info.UNC + 3, '/') ==
1852                                         NULL)) {
1853                                         rc = connect_to_dfs_path(xid, pSesInfo,
1854                                                         "", cifs_sb->local_nls,
1855                                                         cifs_sb->mnt_cifs_flags &
1856                                                           CIFS_MOUNT_MAP_SPECIAL_CHR);
1857                                         kfree(volume_info.UNC);
1858                                         FreeXid(xid);
1859                                         return -ENODEV;
1860                                 } else {
1861                                         rc = CIFSTCon(xid, pSesInfo,
1862                                                 volume_info.UNC,
1863                                                 tcon, cifs_sb->local_nls);
1864                                         cFYI(1, ("CIFS Tcon rc = %d", rc));
1865                                 }
1866                                 if (!rc) {
1867                                         atomic_inc(&pSesInfo->inUse);
1868                                         tcon->retry = volume_info.retry;
1869                                         tcon->nocase = volume_info.nocase;
1870                                 }
1871                         }
1872                 }
1873         }
1874         if(pSesInfo) {
1875                 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
1876                         sb->s_maxbytes = (u64) 1 << 63;
1877                 } else
1878                         sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
1879         }
1880
1881         sb->s_time_gran = 100;
1882
1883 /* on error free sesinfo and tcon struct if needed */
1884         if (rc) {
1885                 /* if session setup failed, use count is zero but
1886                 we still need to free cifsd thread */
1887                 if(atomic_read(&srvTcp->socketUseCount) == 0) {
1888                         spin_lock(&GlobalMid_Lock);
1889                         srvTcp->tcpStatus = CifsExiting;
1890                         spin_unlock(&GlobalMid_Lock);
1891                         if(srvTcp->tsk) {
1892                                 send_sig(SIGKILL,srvTcp->tsk,1);
1893                                 wait_for_completion(&cifsd_complete);
1894                         }
1895                 }
1896                  /* If find_unc succeeded then rc == 0 so we can not end */
1897                 if (tcon)  /* up accidently freeing someone elses tcon struct */
1898                         tconInfoFree(tcon);
1899                 if (existingCifsSes == NULL) {
1900                         if (pSesInfo) {
1901                                 if ((pSesInfo->server) &&
1902                                     (pSesInfo->status == CifsGood)) {
1903                                         int temp_rc;
1904                                         temp_rc = CIFSSMBLogoff(xid, pSesInfo);
1905                                         /* if the socketUseCount is now zero */
1906                                         if((temp_rc == -ESHUTDOWN) &&
1907                                            (pSesInfo->server->tsk)) {
1908                                                 send_sig(SIGKILL,pSesInfo->server->tsk,1);
1909                                                 wait_for_completion(&cifsd_complete);
1910                                         }
1911                                 } else
1912                                         cFYI(1, ("No session or bad tcon"));
1913                                 sesInfoFree(pSesInfo);
1914                                 /* pSesInfo = NULL; */
1915                         }
1916                 }
1917         } else {
1918                 atomic_inc(&tcon->useCount);
1919                 cifs_sb->tcon = tcon;
1920                 tcon->ses = pSesInfo;
1921
1922                 /* do not care if following two calls succeed - informational only */
1923                 CIFSSMBQFSDeviceInfo(xid, tcon);
1924                 CIFSSMBQFSAttributeInfo(xid, tcon);
1925                 if (tcon->ses->capabilities & CAP_UNIX) {
1926                         if(!CIFSSMBQFSUnixInfo(xid, tcon)) {
1927                                 if(!volume_info.no_psx_acl) {
1928                                         if(CIFS_UNIX_POSIX_ACL_CAP &
1929                                            le64_to_cpu(tcon->fsUnixInfo.Capability))
1930                                                 cFYI(1,("server negotiated posix acl support"));
1931                                                 sb->s_flags |= MS_POSIXACL;
1932                                 }
1933
1934                                 /* Try and negotiate POSIX pathnames if we can. */
1935                                 if (volume_info.posix_paths && (CIFS_UNIX_POSIX_PATHNAMES_CAP &
1936                                     le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1937                                         if (!CIFSSMBSetFSUnixInfo(xid, tcon, CIFS_UNIX_POSIX_PATHNAMES_CAP))  {
1938                                                 cFYI(1,("negotiated posix pathnames support"));
1939                                                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_POSIX_PATHS;
1940                                         } else {
1941                                                 cFYI(1,("posix pathnames support requested but not supported"));
1942                                         }
1943                                 }
1944                         }
1945                 }
1946                 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
1947                         cifs_sb->wsize = min(cifs_sb->wsize,
1948                                              (tcon->ses->server->maxBuf -
1949                                               MAX_CIFS_HDR_SIZE));
1950                 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
1951                         cifs_sb->rsize = min(cifs_sb->rsize,
1952                                              (tcon->ses->server->maxBuf -
1953                                               MAX_CIFS_HDR_SIZE));
1954         }
1955
1956         /* volume_info.password is freed above when existing session found
1957         (in which case it is not needed anymore) but when new sesion is created
1958         the password ptr is put in the new session structure (in which case the
1959         password will be freed at unmount time) */
1960         kfree(volume_info.UNC);
1961         FreeXid(xid);
1962         return rc;
1963 }
1964
1965 static int
1966 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
1967               char session_key[CIFS_SESSION_KEY_SIZE],
1968               const struct nls_table *nls_codepage)
1969 {
1970         struct smb_hdr *smb_buffer;
1971         struct smb_hdr *smb_buffer_response;
1972         SESSION_SETUP_ANDX *pSMB;
1973         SESSION_SETUP_ANDX *pSMBr;
1974         char *bcc_ptr;
1975         char *user;
1976         char *domain;
1977         int rc = 0;
1978         int remaining_words = 0;
1979         int bytes_returned = 0;
1980         int len;
1981         __u32 capabilities;
1982         __u16 count;
1983
1984         cFYI(1, ("In sesssetup"));
1985         if(ses == NULL)
1986                 return -EINVAL;
1987         user = ses->userName;
1988         domain = ses->domainName;
1989         smb_buffer = cifs_buf_get();
1990         if (smb_buffer == NULL) {
1991                 return -ENOMEM;
1992         }
1993         smb_buffer_response = smb_buffer;
1994         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
1995
1996         /* send SMBsessionSetup here */
1997         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
1998                         NULL /* no tCon exists yet */ , 13 /* wct */ );
1999
2000         smb_buffer->Mid = GetNextMid(ses->server);
2001         pSMB->req_no_secext.AndXCommand = 0xFF;
2002         pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2003         pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2004
2005         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2006                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2007
2008         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2009                 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2010         if (ses->capabilities & CAP_UNICODE) {
2011                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2012                 capabilities |= CAP_UNICODE;
2013         }
2014         if (ses->capabilities & CAP_STATUS32) {
2015                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2016                 capabilities |= CAP_STATUS32;
2017         }
2018         if (ses->capabilities & CAP_DFS) {
2019                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2020                 capabilities |= CAP_DFS;
2021         }
2022         pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2023
2024         pSMB->req_no_secext.CaseInsensitivePasswordLength =
2025                 cpu_to_le16(CIFS_SESSION_KEY_SIZE);
2026
2027         pSMB->req_no_secext.CaseSensitivePasswordLength =
2028             cpu_to_le16(CIFS_SESSION_KEY_SIZE);
2029         bcc_ptr = pByteArea(smb_buffer);
2030         memcpy(bcc_ptr, (char *) session_key, CIFS_SESSION_KEY_SIZE);
2031         bcc_ptr += CIFS_SESSION_KEY_SIZE;
2032         memcpy(bcc_ptr, (char *) session_key, CIFS_SESSION_KEY_SIZE);
2033         bcc_ptr += CIFS_SESSION_KEY_SIZE;
2034
2035         if (ses->capabilities & CAP_UNICODE) {
2036                 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2037                         *bcc_ptr = 0;
2038                         bcc_ptr++;
2039                 }
2040                 if(user == NULL)
2041                         bytes_returned = 0; /* skill null user */
2042                 else
2043                         bytes_returned =
2044                                 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2045                                         nls_codepage);
2046                 /* convert number of 16 bit words to bytes */
2047                 bcc_ptr += 2 * bytes_returned;
2048                 bcc_ptr += 2;   /* trailing null */
2049                 if (domain == NULL)
2050                         bytes_returned =
2051                             cifs_strtoUCS((__le16 *) bcc_ptr,
2052                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2053                 else
2054                         bytes_returned =
2055                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2056                                           nls_codepage);
2057                 bcc_ptr += 2 * bytes_returned;
2058                 bcc_ptr += 2;
2059                 bytes_returned =
2060                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2061                                   32, nls_codepage);
2062                 bcc_ptr += 2 * bytes_returned;
2063                 bytes_returned =
2064                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release,
2065                                   32, nls_codepage);
2066                 bcc_ptr += 2 * bytes_returned;
2067                 bcc_ptr += 2;
2068                 bytes_returned =
2069                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2070                                   64, nls_codepage);
2071                 bcc_ptr += 2 * bytes_returned;
2072                 bcc_ptr += 2;
2073         } else {
2074                 if(user != NULL) {
2075                     strncpy(bcc_ptr, user, 200);
2076                     bcc_ptr += strnlen(user, 200);
2077                 }
2078                 *bcc_ptr = 0;
2079                 bcc_ptr++;
2080                 if (domain == NULL) {
2081                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2082                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2083                 } else {
2084                         strncpy(bcc_ptr, domain, 64);
2085                         bcc_ptr += strnlen(domain, 64);
2086                         *bcc_ptr = 0;
2087                         bcc_ptr++;
2088                 }
2089                 strcpy(bcc_ptr, "Linux version ");
2090                 bcc_ptr += strlen("Linux version ");
2091                 strcpy(bcc_ptr, system_utsname.release);
2092                 bcc_ptr += strlen(system_utsname.release) + 1;
2093                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2094                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2095         }
2096         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2097         smb_buffer->smb_buf_length += count;
2098         pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2099
2100         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2101                          &bytes_returned, 1);
2102         if (rc) {
2103 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2104         } else if ((smb_buffer_response->WordCount == 3)
2105                    || (smb_buffer_response->WordCount == 4)) {
2106                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2107                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2108                 if (action & GUEST_LOGIN)
2109                         cFYI(1, (" Guest login"));      /* do we want to mark SesInfo struct ? */
2110                 ses->Suid = smb_buffer_response->Uid;   /* UID left in wire format (le) */
2111                 cFYI(1, ("UID = %d ", ses->Suid));
2112          /* response can have either 3 or 4 word count - Samba sends 3 */
2113                 bcc_ptr = pByteArea(smb_buffer_response);
2114                 if ((pSMBr->resp.hdr.WordCount == 3)
2115                     || ((pSMBr->resp.hdr.WordCount == 4)
2116                         && (blob_len < pSMBr->resp.ByteCount))) {
2117                         if (pSMBr->resp.hdr.WordCount == 4)
2118                                 bcc_ptr += blob_len;
2119
2120                         if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2121                                 if ((long) (bcc_ptr) % 2) {
2122                                         remaining_words =
2123                                             (BCC(smb_buffer_response) - 1) /2;
2124                                         bcc_ptr++;      /* Unicode strings must be word aligned */
2125                                 } else {
2126                                         remaining_words =
2127                                                 BCC(smb_buffer_response) / 2;
2128                                 }
2129                                 len =
2130                                     UniStrnlen((wchar_t *) bcc_ptr,
2131                                                remaining_words - 1);
2132 /* We look for obvious messed up bcc or strings in response so we do not go off
2133    the end since (at least) WIN2K and Windows XP have a major bug in not null
2134    terminating last Unicode string in response  */
2135                                 ses->serverOS = kzalloc(2 * (len + 1), GFP_KERNEL);
2136                                 if(ses->serverOS == NULL)
2137                                         goto sesssetup_nomem;
2138                                 cifs_strfromUCS_le(ses->serverOS,
2139                                            (__le16 *)bcc_ptr, len,nls_codepage);
2140                                 bcc_ptr += 2 * (len + 1);
2141                                 remaining_words -= len + 1;
2142                                 ses->serverOS[2 * len] = 0;
2143                                 ses->serverOS[1 + (2 * len)] = 0;
2144                                 if (remaining_words > 0) {
2145                                         len = UniStrnlen((wchar_t *)bcc_ptr,
2146                                                          remaining_words-1);
2147                                         ses->serverNOS = kzalloc(2 * (len + 1),GFP_KERNEL);
2148                                         if(ses->serverNOS == NULL)
2149                                                 goto sesssetup_nomem;
2150                                         cifs_strfromUCS_le(ses->serverNOS,
2151                                                            (__le16 *)bcc_ptr,len,nls_codepage);
2152                                         bcc_ptr += 2 * (len + 1);
2153                                         ses->serverNOS[2 * len] = 0;
2154                                         ses->serverNOS[1 + (2 * len)] = 0;
2155                                         if(strncmp(ses->serverNOS,
2156                                                 "NT LAN Manager 4",16) == 0) {
2157                                                 cFYI(1,("NT4 server"));
2158                                                 ses->flags |= CIFS_SES_NT4;
2159                                         }
2160                                         remaining_words -= len + 1;
2161                                         if (remaining_words > 0) {
2162                                                 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2163           /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2164                                                 ses->serverDomain =
2165                                                     kzalloc(2*(len+1),GFP_KERNEL);
2166                                                 if(ses->serverDomain == NULL)
2167                                                         goto sesssetup_nomem;
2168                                                 cifs_strfromUCS_le(ses->serverDomain,
2169                                                      (__le16 *)bcc_ptr,len,nls_codepage);
2170                                                 bcc_ptr += 2 * (len + 1);
2171                                                 ses->serverDomain[2*len] = 0;
2172                                                 ses->serverDomain[1+(2*len)] = 0;
2173                                         } /* else no more room so create dummy domain string */
2174                                         else
2175                                                 ses->serverDomain =
2176                                                         kzalloc(2, GFP_KERNEL);
2177                                 } else {        /* no room so create dummy domain and NOS string */
2178                                         /* if these kcallocs fail not much we
2179                                            can do, but better to not fail the
2180                                            sesssetup itself */
2181                                         ses->serverDomain =
2182                                             kzalloc(2, GFP_KERNEL);
2183                                         ses->serverNOS =
2184                                             kzalloc(2, GFP_KERNEL);
2185                                 }
2186                         } else {        /* ASCII */
2187                                 len = strnlen(bcc_ptr, 1024);
2188                                 if (((long) bcc_ptr + len) - (long)
2189                                     pByteArea(smb_buffer_response)
2190                                             <= BCC(smb_buffer_response)) {
2191                                         ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
2192                                         if(ses->serverOS == NULL)
2193                                                 goto sesssetup_nomem;
2194                                         strncpy(ses->serverOS,bcc_ptr, len);
2195
2196                                         bcc_ptr += len;
2197                                         bcc_ptr[0] = 0; /* null terminate the string */
2198                                         bcc_ptr++;
2199
2200                                         len = strnlen(bcc_ptr, 1024);
2201                                         ses->serverNOS = kzalloc(len + 1,GFP_KERNEL);
2202                                         if(ses->serverNOS == NULL)
2203                                                 goto sesssetup_nomem;
2204                                         strncpy(ses->serverNOS, bcc_ptr, len);
2205                                         bcc_ptr += len;
2206                                         bcc_ptr[0] = 0;
2207                                         bcc_ptr++;
2208
2209                                         len = strnlen(bcc_ptr, 1024);
2210                                         ses->serverDomain = kzalloc(len + 1,GFP_KERNEL);
2211                                         if(ses->serverDomain == NULL)
2212                                                 goto sesssetup_nomem;
2213                                         strncpy(ses->serverDomain, bcc_ptr, len);
2214                                         bcc_ptr += len;
2215                                         bcc_ptr[0] = 0;
2216                                         bcc_ptr++;
2217                                 } else
2218                                         cFYI(1,
2219                                              ("Variable field of length %d extends beyond end of smb ",
2220                                               len));
2221                         }
2222                 } else {
2223                         cERROR(1,
2224                                (" Security Blob Length extends beyond end of SMB"));
2225                 }
2226         } else {
2227                 cERROR(1,
2228                        (" Invalid Word count %d: ",
2229                         smb_buffer_response->WordCount));
2230                 rc = -EIO;
2231         }
2232 sesssetup_nomem:        /* do not return an error on nomem for the info strings,
2233                            since that could make reconnection harder, and
2234                            reconnection might be needed to free memory */
2235         if (smb_buffer)
2236                 cifs_buf_release(smb_buffer);
2237
2238         return rc;
2239 }
2240
2241 static int
2242 CIFSSpnegoSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2243                 char *SecurityBlob,int SecurityBlobLength,
2244                 const struct nls_table *nls_codepage)
2245 {
2246         struct smb_hdr *smb_buffer;
2247         struct smb_hdr *smb_buffer_response;
2248         SESSION_SETUP_ANDX *pSMB;
2249         SESSION_SETUP_ANDX *pSMBr;
2250         char *bcc_ptr;
2251         char *user;
2252         char *domain;
2253         int rc = 0;
2254         int remaining_words = 0;
2255         int bytes_returned = 0;
2256         int len;
2257         __u32 capabilities;
2258         __u16 count;
2259
2260         cFYI(1, ("In spnego sesssetup "));
2261         if(ses == NULL)
2262                 return -EINVAL;
2263         user = ses->userName;
2264         domain = ses->domainName;
2265
2266         smb_buffer = cifs_buf_get();
2267         if (smb_buffer == NULL) {
2268                 return -ENOMEM;
2269         }
2270         smb_buffer_response = smb_buffer;
2271         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2272
2273         /* send SMBsessionSetup here */
2274         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2275                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2276
2277         smb_buffer->Mid = GetNextMid(ses->server);
2278         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2279         pSMB->req.AndXCommand = 0xFF;
2280         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2281         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2282
2283         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2284                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2285
2286         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2287             CAP_EXTENDED_SECURITY;
2288         if (ses->capabilities & CAP_UNICODE) {
2289                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2290                 capabilities |= CAP_UNICODE;
2291         }
2292         if (ses->capabilities & CAP_STATUS32) {
2293                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2294                 capabilities |= CAP_STATUS32;
2295         }
2296         if (ses->capabilities & CAP_DFS) {
2297                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2298                 capabilities |= CAP_DFS;
2299         }
2300         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2301
2302         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2303         bcc_ptr = pByteArea(smb_buffer);
2304         memcpy(bcc_ptr, SecurityBlob, SecurityBlobLength);
2305         bcc_ptr += SecurityBlobLength;
2306
2307         if (ses->capabilities & CAP_UNICODE) {
2308                 if ((long) bcc_ptr % 2) {       /* must be word aligned for Unicode strings */
2309                         *bcc_ptr = 0;
2310                         bcc_ptr++;
2311                 }
2312                 bytes_returned =
2313                     cifs_strtoUCS((__le16 *) bcc_ptr, user, 100, nls_codepage);
2314                 bcc_ptr += 2 * bytes_returned;  /* convert num of 16 bit words to bytes */
2315                 bcc_ptr += 2;   /* trailing null */
2316                 if (domain == NULL)
2317                         bytes_returned =
2318                             cifs_strtoUCS((__le16 *) bcc_ptr,
2319                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2320                 else
2321                         bytes_returned =
2322                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2323                                           nls_codepage);
2324                 bcc_ptr += 2 * bytes_returned;
2325                 bcc_ptr += 2;
2326                 bytes_returned =
2327                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2328                                   32, nls_codepage);
2329                 bcc_ptr += 2 * bytes_returned;
2330                 bytes_returned =
2331                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release, 32,
2332                                   nls_codepage);
2333                 bcc_ptr += 2 * bytes_returned;
2334                 bcc_ptr += 2;
2335                 bytes_returned =
2336                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2337                                   64, nls_codepage);
2338                 bcc_ptr += 2 * bytes_returned;
2339                 bcc_ptr += 2;
2340         } else {
2341                 strncpy(bcc_ptr, user, 200);
2342                 bcc_ptr += strnlen(user, 200);
2343                 *bcc_ptr = 0;
2344                 bcc_ptr++;
2345                 if (domain == NULL) {
2346                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2347                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2348                 } else {
2349                         strncpy(bcc_ptr, domain, 64);
2350                         bcc_ptr += strnlen(domain, 64);
2351                         *bcc_ptr = 0;
2352                         bcc_ptr++;
2353                 }
2354                 strcpy(bcc_ptr, "Linux version ");
2355                 bcc_ptr += strlen("Linux version ");
2356                 strcpy(bcc_ptr, system_utsname.release);
2357                 bcc_ptr += strlen(system_utsname.release) + 1;
2358                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2359                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2360         }
2361         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2362         smb_buffer->smb_buf_length += count;
2363         pSMB->req.ByteCount = cpu_to_le16(count);
2364
2365         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2366                          &bytes_returned, 1);
2367         if (rc) {
2368 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2369         } else if ((smb_buffer_response->WordCount == 3)
2370                    || (smb_buffer_response->WordCount == 4)) {
2371                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2372                 __u16 blob_len =
2373                     le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2374                 if (action & GUEST_LOGIN)
2375                         cFYI(1, (" Guest login"));      /* BB do we want to set anything in SesInfo struct ? */
2376                 if (ses) {
2377                         ses->Suid = smb_buffer_response->Uid;   /* UID left in wire format (le) */
2378                         cFYI(1, ("UID = %d ", ses->Suid));
2379                         bcc_ptr = pByteArea(smb_buffer_response);       /* response can have either 3 or 4 word count - Samba sends 3 */
2380
2381                         /* BB Fix below to make endian neutral !! */
2382
2383                         if ((pSMBr->resp.hdr.WordCount == 3)
2384                             || ((pSMBr->resp.hdr.WordCount == 4)
2385                                 && (blob_len <
2386                                     pSMBr->resp.ByteCount))) {
2387                                 if (pSMBr->resp.hdr.WordCount == 4) {
2388                                         bcc_ptr +=
2389                                             blob_len;
2390                                         cFYI(1,
2391                                              ("Security Blob Length %d ",
2392                                               blob_len));
2393                                 }
2394
2395                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2396                                         if ((long) (bcc_ptr) % 2) {
2397                                                 remaining_words =
2398                                                     (BCC(smb_buffer_response)
2399                                                      - 1) / 2;
2400                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
2401                                         } else {
2402                                                 remaining_words =
2403                                                     BCC
2404                                                     (smb_buffer_response) / 2;
2405                                         }
2406                                         len =
2407                                             UniStrnlen((wchar_t *) bcc_ptr,
2408                                                        remaining_words - 1);
2409 /* We look for obvious messed up bcc or strings in response so we do not go off
2410    the end since (at least) WIN2K and Windows XP have a major bug in not null
2411    terminating last Unicode string in response  */
2412                                         ses->serverOS =
2413                                             kzalloc(2 * (len + 1), GFP_KERNEL);
2414                                         cifs_strfromUCS_le(ses->serverOS,
2415                                                            (__le16 *)
2416                                                            bcc_ptr, len,
2417                                                            nls_codepage);
2418                                         bcc_ptr += 2 * (len + 1);
2419                                         remaining_words -= len + 1;
2420                                         ses->serverOS[2 * len] = 0;
2421                                         ses->serverOS[1 + (2 * len)] = 0;
2422                                         if (remaining_words > 0) {
2423                                                 len = UniStrnlen((wchar_t *)bcc_ptr,
2424                                                                  remaining_words
2425                                                                  - 1);
2426                                                 ses->serverNOS =
2427                                                     kzalloc(2 * (len + 1),
2428                                                             GFP_KERNEL);
2429                                                 cifs_strfromUCS_le(ses->serverNOS,
2430                                                                    (__le16 *)bcc_ptr,
2431                                                                    len,
2432                                                                    nls_codepage);
2433                                                 bcc_ptr += 2 * (len + 1);
2434                                                 ses->serverNOS[2 * len] = 0;
2435                                                 ses->serverNOS[1 + (2 * len)] = 0;
2436                                                 remaining_words -= len + 1;
2437                                                 if (remaining_words > 0) {
2438                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2439                             /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2440                                                         ses->serverDomain = kzalloc(2*(len+1),GFP_KERNEL);
2441                                                         cifs_strfromUCS_le(ses->serverDomain,
2442                                                              (__le16 *)bcc_ptr,
2443                                                              len, nls_codepage);
2444                                                         bcc_ptr += 2*(len+1);
2445                                                         ses->serverDomain[2*len] = 0;
2446                                                         ses->serverDomain[1+(2*len)] = 0;
2447                                                 } /* else no more room so create dummy domain string */
2448                                                 else
2449                                                         ses->serverDomain =
2450                                                             kzalloc(2,GFP_KERNEL);
2451                                         } else {        /* no room so create dummy domain and NOS string */
2452                                                 ses->serverDomain = kzalloc(2, GFP_KERNEL);
2453                                                 ses->serverNOS = kzalloc(2, GFP_KERNEL);
2454                                         }
2455                                 } else {        /* ASCII */
2456
2457                                         len = strnlen(bcc_ptr, 1024);
2458                                         if (((long) bcc_ptr + len) - (long)
2459                                             pByteArea(smb_buffer_response)
2460                                             <= BCC(smb_buffer_response)) {
2461                                                 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
2462                                                 strncpy(ses->serverOS, bcc_ptr, len);
2463
2464                                                 bcc_ptr += len;
2465                                                 bcc_ptr[0] = 0; /* null terminate the string */
2466                                                 bcc_ptr++;
2467
2468                                                 len = strnlen(bcc_ptr, 1024);
2469                                                 ses->serverNOS = kzalloc(len + 1,GFP_KERNEL);
2470                                                 strncpy(ses->serverNOS, bcc_ptr, len);
2471                                                 bcc_ptr += len;
2472                                                 bcc_ptr[0] = 0;
2473                                                 bcc_ptr++;
2474
2475                                                 len = strnlen(bcc_ptr, 1024);
2476                                                 ses->serverDomain = kzalloc(len + 1, GFP_KERNEL);
2477                                                 strncpy(ses->serverDomain, bcc_ptr, len);
2478                                                 bcc_ptr += len;
2479                                                 bcc_ptr[0] = 0;
2480                                                 bcc_ptr++;
2481                                         } else
2482                                                 cFYI(1,
2483                                                      ("Variable field of length %d extends beyond end of smb ",
2484                                                       len));
2485                                 }
2486                         } else {
2487                                 cERROR(1,
2488                                        (" Security Blob Length extends beyond end of SMB"));
2489                         }
2490                 } else {
2491                         cERROR(1, ("No session structure passed in."));
2492                 }
2493         } else {
2494                 cERROR(1,
2495                        (" Invalid Word count %d: ",
2496                         smb_buffer_response->WordCount));
2497                 rc = -EIO;
2498         }
2499
2500         if (smb_buffer)
2501                 cifs_buf_release(smb_buffer);
2502
2503         return rc;
2504 }
2505
2506 static int
2507 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2508                               struct cifsSesInfo *ses, int * pNTLMv2_flag,
2509                               const struct nls_table *nls_codepage)
2510 {
2511         struct smb_hdr *smb_buffer;
2512         struct smb_hdr *smb_buffer_response;
2513         SESSION_SETUP_ANDX *pSMB;
2514         SESSION_SETUP_ANDX *pSMBr;
2515         char *bcc_ptr;
2516         char *domain;
2517         int rc = 0;
2518         int remaining_words = 0;
2519         int bytes_returned = 0;
2520         int len;
2521         int SecurityBlobLength = sizeof (NEGOTIATE_MESSAGE);
2522         PNEGOTIATE_MESSAGE SecurityBlob;
2523         PCHALLENGE_MESSAGE SecurityBlob2;
2524         __u32 negotiate_flags, capabilities;
2525         __u16 count;
2526
2527         cFYI(1, ("In NTLMSSP sesssetup (negotiate) "));
2528         if(ses == NULL)
2529                 return -EINVAL;
2530         domain = ses->domainName;
2531         *pNTLMv2_flag = FALSE;
2532         smb_buffer = cifs_buf_get();
2533         if (smb_buffer == NULL) {
2534                 return -ENOMEM;
2535         }
2536         smb_buffer_response = smb_buffer;
2537         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2538         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2539
2540         /* send SMBsessionSetup here */
2541         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2542                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2543
2544         smb_buffer->Mid = GetNextMid(ses->server);
2545         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2546         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2547
2548         pSMB->req.AndXCommand = 0xFF;
2549         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2550         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2551
2552         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2553                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2554
2555         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2556             CAP_EXTENDED_SECURITY;
2557         if (ses->capabilities & CAP_UNICODE) {
2558                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2559                 capabilities |= CAP_UNICODE;
2560         }
2561         if (ses->capabilities & CAP_STATUS32) {
2562                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2563                 capabilities |= CAP_STATUS32;
2564         }
2565         if (ses->capabilities & CAP_DFS) {
2566                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2567                 capabilities |= CAP_DFS;
2568         }
2569         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2570
2571         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2572         SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2573         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2574         SecurityBlob->MessageType = NtLmNegotiate;
2575         negotiate_flags =
2576             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2577             NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM | 0x80000000 |
2578             /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2579         if(sign_CIFS_PDUs)
2580                 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2581         if(ntlmv2_support)
2582                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
2583         /* setup pointers to domain name and workstation name */
2584         bcc_ptr += SecurityBlobLength;
2585
2586         SecurityBlob->WorkstationName.Buffer = 0;
2587         SecurityBlob->WorkstationName.Length = 0;
2588         SecurityBlob->WorkstationName.MaximumLength = 0;
2589
2590         if (domain == NULL) {
2591                 SecurityBlob->DomainName.Buffer = 0;
2592                 SecurityBlob->DomainName.Length = 0;
2593                 SecurityBlob->DomainName.MaximumLength = 0;
2594         } else {
2595                 __u16 len;
2596                 negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
2597                 strncpy(bcc_ptr, domain, 63);
2598                 len = strnlen(domain, 64);
2599                 SecurityBlob->DomainName.MaximumLength =
2600                     cpu_to_le16(len);
2601                 SecurityBlob->DomainName.Buffer =
2602                     cpu_to_le32((long) &SecurityBlob->
2603                                 DomainString -
2604                                 (long) &SecurityBlob->Signature);
2605                 bcc_ptr += len;
2606                 SecurityBlobLength += len;
2607                 SecurityBlob->DomainName.Length =
2608                     cpu_to_le16(len);
2609         }
2610         if (ses->capabilities & CAP_UNICODE) {
2611                 if ((long) bcc_ptr % 2) {
2612                         *bcc_ptr = 0;
2613                         bcc_ptr++;
2614                 }
2615
2616                 bytes_returned =
2617                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2618                                   32, nls_codepage);
2619                 bcc_ptr += 2 * bytes_returned;
2620                 bytes_returned =
2621                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release, 32,
2622                                   nls_codepage);
2623                 bcc_ptr += 2 * bytes_returned;
2624                 bcc_ptr += 2;   /* null terminate Linux version */
2625                 bytes_returned =
2626                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2627                                   64, nls_codepage);
2628                 bcc_ptr += 2 * bytes_returned;
2629                 *(bcc_ptr + 1) = 0;
2630                 *(bcc_ptr + 2) = 0;
2631                 bcc_ptr += 2;   /* null terminate network opsys string */
2632                 *(bcc_ptr + 1) = 0;
2633                 *(bcc_ptr + 2) = 0;
2634                 bcc_ptr += 2;   /* null domain */
2635         } else {                /* ASCII */
2636                 strcpy(bcc_ptr, "Linux version ");
2637                 bcc_ptr += strlen("Linux version ");
2638                 strcpy(bcc_ptr, system_utsname.release);
2639                 bcc_ptr += strlen(system_utsname.release) + 1;
2640                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2641                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2642                 bcc_ptr++;      /* empty domain field */
2643                 *bcc_ptr = 0;
2644         }
2645         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2646         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2647         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2648         smb_buffer->smb_buf_length += count;
2649         pSMB->req.ByteCount = cpu_to_le16(count);
2650
2651         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2652                          &bytes_returned, 1);
2653
2654         if (smb_buffer_response->Status.CifsError ==
2655             cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
2656                 rc = 0;
2657
2658         if (rc) {
2659 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2660         } else if ((smb_buffer_response->WordCount == 3)
2661                    || (smb_buffer_response->WordCount == 4)) {
2662                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2663                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2664
2665                 if (action & GUEST_LOGIN)
2666                         cFYI(1, (" Guest login"));
2667         /* Do we want to set anything in SesInfo struct when guest login? */
2668
2669                 bcc_ptr = pByteArea(smb_buffer_response);
2670         /* response can have either 3 or 4 word count - Samba sends 3 */
2671
2672                 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
2673                 if (SecurityBlob2->MessageType != NtLmChallenge) {
2674                         cFYI(1,
2675                              ("Unexpected NTLMSSP message type received %d",
2676                               SecurityBlob2->MessageType));
2677                 } else if (ses) {
2678                         ses->Suid = smb_buffer_response->Uid; /* UID left in le format */
2679                         cFYI(1, ("UID = %d ", ses->Suid));
2680                         if ((pSMBr->resp.hdr.WordCount == 3)
2681                             || ((pSMBr->resp.hdr.WordCount == 4)
2682                                 && (blob_len <
2683                                     pSMBr->resp.ByteCount))) {
2684
2685                                 if (pSMBr->resp.hdr.WordCount == 4) {
2686                                         bcc_ptr += blob_len;
2687                                         cFYI(1,
2688                                              ("Security Blob Length %d ",
2689                                               blob_len));
2690                                 }
2691
2692                                 cFYI(1, ("NTLMSSP Challenge rcvd "));
2693
2694                                 memcpy(ses->server->cryptKey,
2695                                        SecurityBlob2->Challenge,
2696                                        CIFS_CRYPTO_KEY_SIZE);
2697                                 if(SecurityBlob2->NegotiateFlags & cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
2698                                         *pNTLMv2_flag = TRUE;
2699
2700                                 if((SecurityBlob2->NegotiateFlags &
2701                                         cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN))
2702                                         || (sign_CIFS_PDUs > 1))
2703                                                 ses->server->secMode |=
2704                                                         SECMODE_SIGN_REQUIRED;
2705                                 if ((SecurityBlob2->NegotiateFlags &
2706                                         cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
2707                                                 ses->server->secMode |=
2708                                                         SECMODE_SIGN_ENABLED;
2709
2710                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2711                                         if ((long) (bcc_ptr) % 2) {
2712                                                 remaining_words =
2713                                                     (BCC(smb_buffer_response)
2714                                                      - 1) / 2;
2715                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
2716                                         } else {
2717                                                 remaining_words =
2718                                                     BCC
2719                                                     (smb_buffer_response) / 2;
2720                                         }
2721                                         len =
2722                                             UniStrnlen((wchar_t *) bcc_ptr,
2723                                                        remaining_words - 1);
2724 /* We look for obvious messed up bcc or strings in response so we do not go off
2725    the end since (at least) WIN2K and Windows XP have a major bug in not null
2726    terminating last Unicode string in response  */
2727                                         ses->serverOS =
2728                                             kzalloc(2 * (len + 1), GFP_KERNEL);
2729                                         cifs_strfromUCS_le(ses->serverOS,
2730                                                            (__le16 *)
2731                                                            bcc_ptr, len,
2732                                                            nls_codepage);
2733                                         bcc_ptr += 2 * (len + 1);
2734                                         remaining_words -= len + 1;
2735                                         ses->serverOS[2 * len] = 0;
2736                                         ses->serverOS[1 + (2 * len)] = 0;
2737                                         if (remaining_words > 0) {
2738                                                 len = UniStrnlen((wchar_t *)
2739                                                                  bcc_ptr,
2740                                                                  remaining_words
2741                                                                  - 1);
2742                                                 ses->serverNOS =
2743                                                     kzalloc(2 * (len + 1),
2744                                                             GFP_KERNEL);
2745                                                 cifs_strfromUCS_le(ses->
2746                                                                    serverNOS,
2747                                                                    (__le16 *)
2748                                                                    bcc_ptr,
2749                                                                    len,
2750                                                                    nls_codepage);
2751                                                 bcc_ptr += 2 * (len + 1);
2752                                                 ses->serverNOS[2 * len] = 0;
2753                                                 ses->serverNOS[1 +
2754                                                                (2 * len)] = 0;
2755                                                 remaining_words -= len + 1;
2756                                                 if (remaining_words > 0) {
2757                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2758            /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2759                                                         ses->serverDomain =
2760                                                             kzalloc(2 *
2761                                                                     (len +
2762                                                                      1),
2763                                                                     GFP_KERNEL);
2764                                                         cifs_strfromUCS_le
2765                                                             (ses->serverDomain,
2766                                                              (__le16 *)bcc_ptr,
2767                                                              len, nls_codepage);
2768                                                         bcc_ptr +=
2769                                                             2 * (len + 1);
2770                                                         ses->serverDomain[2*len]
2771                                                             = 0;
2772                                                         ses->serverDomain
2773                                                                 [1 + (2 * len)]
2774                                                             = 0;
2775                                                 } /* else no more room so create dummy domain string */
2776                                                 else
2777                                                         ses->serverDomain =
2778                                                             kzalloc(2,
2779                                                                     GFP_KERNEL);
2780                                         } else {        /* no room so create dummy domain and NOS string */
2781                                                 ses->serverDomain =
2782                                                     kzalloc(2, GFP_KERNEL);
2783                                                 ses->serverNOS =
2784                                                     kzalloc(2, GFP_KERNEL);
2785                                         }
2786                                 } else {        /* ASCII */
2787                                         len = strnlen(bcc_ptr, 1024);
2788                                         if (((long) bcc_ptr + len) - (long)
2789                                             pByteArea(smb_buffer_response)
2790                                             <= BCC(smb_buffer_response)) {
2791                                                 ses->serverOS =
2792                                                     kzalloc(len + 1,
2793                                                             GFP_KERNEL);
2794                                                 strncpy(ses->serverOS,
2795                                                         bcc_ptr, len);
2796
2797                                                 bcc_ptr += len;
2798                                                 bcc_ptr[0] = 0; /* null terminate string */
2799                                                 bcc_ptr++;
2800
2801                                                 len = strnlen(bcc_ptr, 1024);
2802                                                 ses->serverNOS =
2803                                                     kzalloc(len + 1,
2804                                                             GFP_KERNEL);
2805                                                 strncpy(ses->serverNOS, bcc_ptr, len);
2806                                                 bcc_ptr += len;
2807                                                 bcc_ptr[0] = 0;
2808                                                 bcc_ptr++;
2809
2810                                                 len = strnlen(bcc_ptr, 1024);
2811                                                 ses->serverDomain =
2812                                                     kzalloc(len + 1,
2813                                                             GFP_KERNEL);
2814                                                 strncpy(ses->serverDomain, bcc_ptr, len);
2815                                                 bcc_ptr += len;
2816                                                 bcc_ptr[0] = 0;
2817                                                 bcc_ptr++;
2818                                         } else
2819                                                 cFYI(1,
2820                                                      ("Variable field of length %d extends beyond end of smb ",
2821                                                       len));
2822                                 }
2823                         } else {
2824                                 cERROR(1,
2825                                        (" Security Blob Length extends beyond end of SMB"));
2826                         }
2827                 } else {
2828                         cERROR(1, ("No session structure passed in."));
2829                 }
2830         } else {
2831                 cERROR(1,
2832                        (" Invalid Word count %d: ",
2833                         smb_buffer_response->WordCount));
2834                 rc = -EIO;
2835         }
2836
2837         if (smb_buffer)
2838                 cifs_buf_release(smb_buffer);
2839
2840         return rc;
2841 }
2842 static int
2843 CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2844                 char *ntlm_session_key, int ntlmv2_flag,
2845                 const struct nls_table *nls_codepage)
2846 {
2847         struct smb_hdr *smb_buffer;
2848         struct smb_hdr *smb_buffer_response;
2849         SESSION_SETUP_ANDX *pSMB;
2850         SESSION_SETUP_ANDX *pSMBr;
2851         char *bcc_ptr;
2852         char *user;
2853         char *domain;
2854         int rc = 0;
2855         int remaining_words = 0;
2856         int bytes_returned = 0;
2857         int len;
2858         int SecurityBlobLength = sizeof (AUTHENTICATE_MESSAGE);
2859         PAUTHENTICATE_MESSAGE SecurityBlob;
2860         __u32 negotiate_flags, capabilities;
2861         __u16 count;
2862
2863         cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
2864         if(ses == NULL)
2865                 return -EINVAL;
2866         user = ses->userName;
2867         domain = ses->domainName;
2868         smb_buffer = cifs_buf_get();
2869         if (smb_buffer == NULL) {
2870                 return -ENOMEM;
2871         }
2872         smb_buffer_response = smb_buffer;
2873         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2874         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2875
2876         /* send SMBsessionSetup here */
2877         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2878                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2879
2880         smb_buffer->Mid = GetNextMid(ses->server);
2881         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2882         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2883         pSMB->req.AndXCommand = 0xFF;
2884         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2885         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2886
2887         pSMB->req.hdr.Uid = ses->Suid;
2888
2889         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2890                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2891
2892         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2893             CAP_EXTENDED_SECURITY;
2894         if (ses->capabilities & CAP_UNICODE) {
2895                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2896                 capabilities |= CAP_UNICODE;
2897         }
2898         if (ses->capabilities & CAP_STATUS32) {
2899                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2900                 capabilities |= CAP_STATUS32;
2901         }
2902         if (ses->capabilities & CAP_DFS) {
2903                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2904                 capabilities |= CAP_DFS;
2905         }
2906         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2907
2908         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2909         SecurityBlob = (PAUTHENTICATE_MESSAGE) bcc_ptr;
2910         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2911         SecurityBlob->MessageType = NtLmAuthenticate;
2912         bcc_ptr += SecurityBlobLength;
2913         negotiate_flags =
2914             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
2915             NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
2916             0x80000000 | NTLMSSP_NEGOTIATE_128;
2917         if(sign_CIFS_PDUs)
2918                 negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
2919         if(ntlmv2_flag)
2920                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
2921
2922 /* setup pointers to domain name and workstation name */
2923
2924         SecurityBlob->WorkstationName.Buffer = 0;
2925         SecurityBlob->WorkstationName.Length = 0;
2926         SecurityBlob->WorkstationName.MaximumLength = 0;
2927         SecurityBlob->SessionKey.Length = 0;
2928         SecurityBlob->SessionKey.MaximumLength = 0;
2929         SecurityBlob->SessionKey.Buffer = 0;
2930
2931         SecurityBlob->LmChallengeResponse.Length = 0;
2932         SecurityBlob->LmChallengeResponse.MaximumLength = 0;
2933         SecurityBlob->LmChallengeResponse.Buffer = 0;
2934
2935         SecurityBlob->NtChallengeResponse.Length =
2936             cpu_to_le16(CIFS_SESSION_KEY_SIZE);
2937         SecurityBlob->NtChallengeResponse.MaximumLength =
2938             cpu_to_le16(CIFS_SESSION_KEY_SIZE);
2939         memcpy(bcc_ptr, ntlm_session_key, CIFS_SESSION_KEY_SIZE);
2940         SecurityBlob->NtChallengeResponse.Buffer =
2941             cpu_to_le32(SecurityBlobLength);
2942         SecurityBlobLength += CIFS_SESSION_KEY_SIZE;
2943         bcc_ptr += CIFS_SESSION_KEY_SIZE;
2944
2945         if (ses->capabilities & CAP_UNICODE) {
2946                 if (domain == NULL) {
2947                         SecurityBlob->DomainName.Buffer = 0;
2948                         SecurityBlob->DomainName.Length = 0;
2949                         SecurityBlob->DomainName.MaximumLength = 0;
2950                 } else {
2951                         __u16 len =
2952                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2953                                           nls_codepage);
2954                         len *= 2;
2955                         SecurityBlob->DomainName.MaximumLength =
2956                             cpu_to_le16(len);
2957                         SecurityBlob->DomainName.Buffer =
2958                             cpu_to_le32(SecurityBlobLength);
2959                         bcc_ptr += len;
2960                         SecurityBlobLength += len;
2961                         SecurityBlob->DomainName.Length =
2962                             cpu_to_le16(len);
2963                 }
2964                 if (user == NULL) {
2965                         SecurityBlob->UserName.Buffer = 0;
2966                         SecurityBlob->UserName.Length = 0;
2967                         SecurityBlob->UserName.MaximumLength = 0;
2968                 } else {
2969                         __u16 len =
2970                             cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
2971                                           nls_codepage);
2972                         len *= 2;
2973                         SecurityBlob->UserName.MaximumLength =
2974                             cpu_to_le16(len);
2975                         SecurityBlob->UserName.Buffer =
2976                             cpu_to_le32(SecurityBlobLength);
2977                         bcc_ptr += len;
2978                         SecurityBlobLength += len;
2979                         SecurityBlob->UserName.Length =
2980                             cpu_to_le16(len);
2981                 }
2982
2983                 /* SecurityBlob->WorkstationName.Length = cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
2984                    SecurityBlob->WorkstationName.Length *= 2;
2985                    SecurityBlob->WorkstationName.MaximumLength = cpu_to_le16(SecurityBlob->WorkstationName.Length);
2986                    SecurityBlob->WorkstationName.Buffer = cpu_to_le32(SecurityBlobLength);
2987                    bcc_ptr += SecurityBlob->WorkstationName.Length;
2988                    SecurityBlobLength += SecurityBlob->WorkstationName.Length;
2989                    SecurityBlob->WorkstationName.Length = cpu_to_le16(SecurityBlob->WorkstationName.Length);  */
2990
2991                 if ((long) bcc_ptr % 2) {
2992                         *bcc_ptr = 0;
2993                         bcc_ptr++;
2994                 }
2995                 bytes_returned =
2996                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2997                                   32, nls_codepage);
2998                 bcc_ptr += 2 * bytes_returned;
2999                 bytes_returned =
3000                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release, 32,
3001                                   nls_codepage);
3002                 bcc_ptr += 2 * bytes_returned;
3003                 bcc_ptr += 2;   /* null term version string */
3004                 bytes_returned =
3005                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
3006                                   64, nls_codepage);
3007                 bcc_ptr += 2 * bytes_returned;
3008                 *(bcc_ptr + 1) = 0;
3009                 *(bcc_ptr + 2) = 0;
3010                 bcc_ptr += 2;   /* null terminate network opsys string */
3011                 *(bcc_ptr + 1) = 0;
3012                 *(bcc_ptr + 2) = 0;
3013                 bcc_ptr += 2;   /* null domain */
3014         } else {                /* ASCII */
3015                 if (domain == NULL) {
3016                         SecurityBlob->DomainName.Buffer = 0;
3017                         SecurityBlob->DomainName.Length = 0;
3018                         SecurityBlob->DomainName.MaximumLength = 0;
3019                 } else {
3020                         __u16 len;
3021                         negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
3022                         strncpy(bcc_ptr, domain, 63);
3023                         len = strnlen(domain, 64);
3024                         SecurityBlob->DomainName.MaximumLength =
3025                             cpu_to_le16(len);
3026                         SecurityBlob->DomainName.Buffer =
3027                             cpu_to_le32(SecurityBlobLength);
3028                         bcc_ptr += len;
3029                         SecurityBlobLength += len;
3030                         SecurityBlob->DomainName.Length = cpu_to_le16(len);
3031                 }
3032                 if (user == NULL) {
3033                         SecurityBlob->UserName.Buffer = 0;
3034                         SecurityBlob->UserName.Length = 0;
3035                         SecurityBlob->UserName.MaximumLength = 0;
3036                 } else {
3037                         __u16 len;
3038                         strncpy(bcc_ptr, user, 63);
3039                         len = strnlen(user, 64);
3040                         SecurityBlob->UserName.MaximumLength =
3041                             cpu_to_le16(len);
3042                         SecurityBlob->UserName.Buffer =
3043                             cpu_to_le32(SecurityBlobLength);
3044                         bcc_ptr += len;
3045                         SecurityBlobLength += len;
3046                         SecurityBlob->UserName.Length = cpu_to_le16(len);
3047                 }
3048                 /* BB fill in our workstation name if known BB */
3049
3050                 strcpy(bcc_ptr, "Linux version ");
3051                 bcc_ptr += strlen("Linux version ");
3052                 strcpy(bcc_ptr, system_utsname.release);
3053                 bcc_ptr += strlen(system_utsname.release) + 1;
3054                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
3055                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
3056                 bcc_ptr++;      /* null domain */
3057                 *bcc_ptr = 0;
3058         }
3059         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
3060         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
3061         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
3062         smb_buffer->smb_buf_length += count;
3063         pSMB->req.ByteCount = cpu_to_le16(count);
3064
3065         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
3066                          &bytes_returned, 1);
3067         if (rc) {
3068 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
3069         } else if ((smb_buffer_response->WordCount == 3)
3070                    || (smb_buffer_response->WordCount == 4)) {
3071                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
3072                 __u16 blob_len =
3073                     le16_to_cpu(pSMBr->resp.SecurityBlobLength);
3074                 if (action & GUEST_LOGIN)
3075                         cFYI(1, (" Guest login"));      /* BB do we want to set anything in SesInfo struct ? */
3076 /*        if(SecurityBlob2->MessageType != NtLm??){
3077                  cFYI("Unexpected message type on auth response is %d "));
3078         } */
3079                 if (ses) {
3080                         cFYI(1,
3081                              ("Does UID on challenge %d match auth response UID %d ",
3082                               ses->Suid, smb_buffer_response->Uid));
3083                         ses->Suid = smb_buffer_response->Uid; /* UID left in wire format */
3084                         bcc_ptr = pByteArea(smb_buffer_response);
3085             /* response can have either 3 or 4 word count - Samba sends 3 */
3086                         if ((pSMBr->resp.hdr.WordCount == 3)
3087                             || ((pSMBr->resp.hdr.WordCount == 4)
3088                                 && (blob_len <
3089                                     pSMBr->resp.ByteCount))) {
3090                                 if (pSMBr->resp.hdr.WordCount == 4) {
3091                                         bcc_ptr +=
3092                                             blob_len;
3093                                         cFYI(1,
3094                                              ("Security Blob Length %d ",
3095                                               blob_len));
3096                                 }
3097
3098                                 cFYI(1,
3099                                      ("NTLMSSP response to Authenticate "));
3100
3101                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3102                                         if ((long) (bcc_ptr) % 2) {
3103                                                 remaining_words =
3104                                                     (BCC(smb_buffer_response)
3105                                                      - 1) / 2;
3106                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
3107                                         } else {
3108                                                 remaining_words = BCC(smb_buffer_response) / 2;
3109                                         }
3110                                         len =
3111                                             UniStrnlen((wchar_t *) bcc_ptr,remaining_words - 1);
3112 /* We look for obvious messed up bcc or strings in response so we do not go off
3113   the end since (at least) WIN2K and Windows XP have a major bug in not null
3114   terminating last Unicode string in response  */
3115                                         ses->serverOS =
3116                                             kzalloc(2 * (len + 1), GFP_KERNEL);
3117                                         cifs_strfromUCS_le(ses->serverOS,
3118                                                            (__le16 *)
3119                                                            bcc_ptr, len,
3120                                                            nls_codepage);
3121                                         bcc_ptr += 2 * (len + 1);
3122                                         remaining_words -= len + 1;
3123                                         ses->serverOS[2 * len] = 0;
3124                                         ses->serverOS[1 + (2 * len)] = 0;
3125                                         if (remaining_words > 0) {
3126                                                 len = UniStrnlen((wchar_t *)
3127                                                                  bcc_ptr,
3128                                                                  remaining_words
3129                                                                  - 1);
3130                                                 ses->serverNOS =
3131                                                     kzalloc(2 * (len + 1),
3132                                                             GFP_KERNEL);
3133                                                 cifs_strfromUCS_le(ses->
3134                                                                    serverNOS,
3135                                                                    (__le16 *)
3136                                                                    bcc_ptr,
3137                                                                    len,
3138                                                                    nls_codepage);
3139                                                 bcc_ptr += 2 * (len + 1);
3140                                                 ses->serverNOS[2 * len] = 0;
3141                                                 ses->serverNOS[1+(2*len)] = 0;
3142                                                 remaining_words -= len + 1;
3143                                                 if (remaining_words > 0) {
3144                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3145      /* last string not always null terminated (e.g. for Windows XP & 2000) */
3146                                                         ses->serverDomain =
3147                                                             kzalloc(2 *
3148                                                                     (len +
3149                                                                      1),
3150                                                                     GFP_KERNEL);
3151                                                         cifs_strfromUCS_le
3152                                                             (ses->
3153                                                              serverDomain,
3154                                                              (__le16 *)
3155                                                              bcc_ptr, len,
3156                                                              nls_codepage);
3157                                                         bcc_ptr +=
3158                                                             2 * (len + 1);
3159                                                         ses->
3160                                                             serverDomain[2
3161                                                                          * len]
3162                                                             = 0;
3163                                                         ses->
3164                                                             serverDomain[1
3165                                                                          +
3166                                                                          (2
3167                                                                           *
3168                                                                           len)]
3169                                                             = 0;
3170                                                 } /* else no more room so create dummy domain string */
3171                                                 else
3172                                                         ses->serverDomain = kzalloc(2,GFP_KERNEL);
3173                                         } else {  /* no room so create dummy domain and NOS string */
3174                                                 ses->serverDomain = kzalloc(2, GFP_KERNEL);
3175                                                 ses->serverNOS = kzalloc(2, GFP_KERNEL);
3176                                         }
3177                                 } else {        /* ASCII */
3178                                         len = strnlen(bcc_ptr, 1024);
3179                                         if (((long) bcc_ptr + len) -
3180                         (long) pByteArea(smb_buffer_response)
3181                             <= BCC(smb_buffer_response)) {
3182                                                 ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
3183                                                 strncpy(ses->serverOS,bcc_ptr, len);
3184
3185                                                 bcc_ptr += len;
3186                                                 bcc_ptr[0] = 0; /* null terminate the string */
3187                                                 bcc_ptr++;
3188
3189                                                 len = strnlen(bcc_ptr, 1024);
3190                                                 ses->serverNOS = kzalloc(len+1,GFP_KERNEL);
3191                                                 strncpy(ses->serverNOS, bcc_ptr, len);
3192                                                 bcc_ptr += len;
3193                                                 bcc_ptr[0] = 0;
3194                                                 bcc_ptr++;
3195
3196                                                 len = strnlen(bcc_ptr, 1024);
3197                                                 ses->serverDomain = kzalloc(len+1,GFP_KERNEL);
3198                                                 strncpy(ses->serverDomain, bcc_ptr, len);
3199                                                 bcc_ptr += len;
3200                                                 bcc_ptr[0] = 0;
3201                                                 bcc_ptr++;
3202                                         } else
3203                                                 cFYI(1,
3204                                                      ("Variable field of length %d extends beyond end of smb ",
3205                                                       len));
3206                                 }
3207                         } else {
3208                                 cERROR(1,
3209                                        (" Security Blob Length extends beyond end of SMB"));
3210                         }
3211                 } else {
3212                         cERROR(1, ("No session structure passed in."));
3213                 }
3214         } else {
3215                 cERROR(1,
3216                        (" Invalid Word count %d: ",
3217                         smb_buffer_response->WordCount));
3218                 rc = -EIO;
3219         }
3220
3221         if (smb_buffer)
3222                 cifs_buf_release(smb_buffer);
3223
3224         return rc;
3225 }
3226
3227 int
3228 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
3229          const char *tree, struct cifsTconInfo *tcon,
3230          const struct nls_table *nls_codepage)
3231 {
3232         struct smb_hdr *smb_buffer;
3233         struct smb_hdr *smb_buffer_response;
3234         TCONX_REQ *pSMB;
3235         TCONX_RSP *pSMBr;
3236         unsigned char *bcc_ptr;
3237         int rc = 0;
3238         int length;
3239         __u16 count;
3240
3241         if (ses == NULL)
3242                 return -EIO;
3243
3244         smb_buffer = cifs_buf_get();
3245         if (smb_buffer == NULL) {
3246                 return -ENOMEM;
3247         }
3248         smb_buffer_response = smb_buffer;
3249
3250         header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3251                         NULL /*no tid */ , 4 /*wct */ );
3252
3253         smb_buffer->Mid = GetNextMid(ses->server);
3254         smb_buffer->Uid = ses->Suid;
3255         pSMB = (TCONX_REQ *) smb_buffer;
3256         pSMBr = (TCONX_RSP *) smb_buffer_response;
3257
3258         pSMB->AndXCommand = 0xFF;
3259         pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3260         bcc_ptr = &pSMB->Password[0];
3261         if((ses->server->secMode) & SECMODE_USER) {
3262                 pSMB->PasswordLength = cpu_to_le16(1);  /* minimum */
3263                 bcc_ptr++;              /* skip password */
3264         } else {
3265                 pSMB->PasswordLength = cpu_to_le16(CIFS_SESSION_KEY_SIZE);
3266                 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3267                    specified as required (when that support is added to
3268                    the vfs in the future) as only NTLM or the much
3269                    weaker LANMAN (which we do not send) is accepted
3270                    by Samba (not sure whether other servers allow
3271                    NTLMv2 password here) */
3272                 SMBNTencrypt(ses->password,
3273                              ses->server->cryptKey,
3274                              bcc_ptr);
3275
3276                 bcc_ptr += CIFS_SESSION_KEY_SIZE;
3277                 *bcc_ptr = 0;
3278                 bcc_ptr++; /* align */
3279         }
3280
3281         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3282                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3283
3284         if (ses->capabilities & CAP_STATUS32) {
3285                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3286         }
3287         if (ses->capabilities & CAP_DFS) {
3288                 smb_buffer->Flags2 |= SMBFLG2_DFS;
3289         }
3290         if (ses->capabilities & CAP_UNICODE) {
3291                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3292                 length =
3293                     cifs_strtoUCS((__le16 *) bcc_ptr, tree, 100, nls_codepage);
3294                 bcc_ptr += 2 * length;  /* convert num of 16 bit words to bytes */
3295                 bcc_ptr += 2;   /* skip trailing null */
3296         } else {                /* ASCII */
3297                 strcpy(bcc_ptr, tree);
3298                 bcc_ptr += strlen(tree) + 1;
3299         }
3300         strcpy(bcc_ptr, "?????");
3301         bcc_ptr += strlen("?????");
3302         bcc_ptr += 1;
3303         count = bcc_ptr - &pSMB->Password[0];
3304         pSMB->hdr.smb_buf_length += count;
3305         pSMB->ByteCount = cpu_to_le16(count);
3306
3307         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, 0);
3308
3309         /* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
3310         /* above now done in SendReceive */
3311         if ((rc == 0) && (tcon != NULL)) {
3312                 tcon->tidStatus = CifsGood;
3313                 tcon->tid = smb_buffer_response->Tid;
3314                 bcc_ptr = pByteArea(smb_buffer_response);
3315                 length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
3316         /* skip service field (NB: this field is always ASCII) */
3317                 bcc_ptr += length + 1;
3318                 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3319                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3320                         length = UniStrnlen((wchar_t *) bcc_ptr, 512);
3321                         if ((bcc_ptr + (2 * length)) -
3322                              pByteArea(smb_buffer_response) <=
3323                             BCC(smb_buffer_response)) {
3324                                 kfree(tcon->nativeFileSystem);
3325                                 tcon->nativeFileSystem =
3326                                     kzalloc(length + 2, GFP_KERNEL);
3327                                 cifs_strfromUCS_le(tcon->nativeFileSystem,
3328                                                    (__le16 *) bcc_ptr,
3329                                                    length, nls_codepage);
3330                                 bcc_ptr += 2 * length;
3331                                 bcc_ptr[0] = 0; /* null terminate the string */
3332                                 bcc_ptr[1] = 0;
3333                                 bcc_ptr += 2;
3334                         }
3335                         /* else do not bother copying these informational fields */
3336                 } else {
3337                         length = strnlen(bcc_ptr, 1024);
3338                         if ((bcc_ptr + length) -
3339                             pByteArea(smb_buffer_response) <=
3340                             BCC(smb_buffer_response)) {
3341                                 kfree(tcon->nativeFileSystem);
3342                                 tcon->nativeFileSystem =
3343                                     kzalloc(length + 1, GFP_KERNEL);
3344                                 strncpy(tcon->nativeFileSystem, bcc_ptr,
3345                                         length);
3346                         }
3347                         /* else do not bother copying these informational fields */
3348                 }
3349                 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3350                 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
3351         } else if ((rc == 0) && tcon == NULL) {
3352         /* all we need to save for IPC$ connection */
3353                 ses->ipc_tid = smb_buffer_response->Tid;
3354         }
3355
3356         if (smb_buffer)
3357                 cifs_buf_release(smb_buffer);
3358         return rc;
3359 }
3360
3361 int
3362 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3363 {
3364         int rc = 0;
3365         int xid;
3366         struct cifsSesInfo *ses = NULL;
3367         struct task_struct *cifsd_task;
3368
3369         xid = GetXid();
3370
3371         if (cifs_sb->tcon) {
3372                 ses = cifs_sb->tcon->ses; /* save ptr to ses before delete tcon!*/
3373                 rc = CIFSSMBTDis(xid, cifs_sb->tcon);
3374                 if (rc == -EBUSY) {
3375                         FreeXid(xid);
3376                         return 0;
3377                 }
3378                 tconInfoFree(cifs_sb->tcon);
3379                 if ((ses) && (ses->server)) {
3380                         /* save off task so we do not refer to ses later */
3381                         cifsd_task = ses->server->tsk;
3382                         cFYI(1, ("About to do SMBLogoff "));
3383                         rc = CIFSSMBLogoff(xid, ses);
3384                         if (rc == -EBUSY) {
3385                                 FreeXid(xid);
3386                                 return 0;
3387                         } else if (rc == -ESHUTDOWN) {
3388                                 cFYI(1,("Waking up socket by sending it signal"));
3389                                 if(cifsd_task) {
3390                                         send_sig(SIGKILL,cifsd_task,1);
3391                                         wait_for_completion(&cifsd_complete);
3392                                 }
3393                                 rc = 0;
3394                         } /* else - we have an smb session
3395                                 left on this socket do not kill cifsd */
3396                 } else
3397                         cFYI(1, ("No session or bad tcon"));
3398         }
3399
3400         cifs_sb->tcon = NULL;
3401         if (ses)
3402                 schedule_timeout_interruptible(msecs_to_jiffies(500));
3403         if (ses)
3404                 sesInfoFree(ses);
3405
3406         FreeXid(xid);
3407         return rc;              /* BB check if we should always return zero here */
3408 }
3409
3410 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3411                                            struct nls_table * nls_info)
3412 {
3413         int rc = 0;
3414         char ntlm_session_key[CIFS_SESSION_KEY_SIZE];
3415         int ntlmv2_flag = FALSE;
3416         int first_time = 0;
3417
3418         /* what if server changes its buffer size after dropping the session? */
3419         if(pSesInfo->server->maxBuf == 0) /* no need to send on reconnect */ {
3420                 rc = CIFSSMBNegotiate(xid, pSesInfo);
3421                 if(rc == -EAGAIN) /* retry only once on 1st time connection */ {
3422                         rc = CIFSSMBNegotiate(xid, pSesInfo);
3423                         if(rc == -EAGAIN)
3424                                 rc = -EHOSTDOWN;
3425                 }
3426                 if(rc == 0) {
3427                         spin_lock(&GlobalMid_Lock);
3428                         if(pSesInfo->server->tcpStatus != CifsExiting)
3429                                 pSesInfo->server->tcpStatus = CifsGood;
3430                         else
3431                                 rc = -EHOSTDOWN;
3432                         spin_unlock(&GlobalMid_Lock);
3433
3434                 }
3435                 first_time = 1;
3436         }
3437         if (!rc) {
3438                 pSesInfo->capabilities = pSesInfo->server->capabilities;
3439                 if(linuxExtEnabled == 0)
3440                         pSesInfo->capabilities &= (~CAP_UNIX);
3441         /*      pSesInfo->sequence_number = 0;*/
3442                 cFYI(1,("Security Mode: 0x%x Capabilities: 0x%x Time Zone: %d",
3443                         pSesInfo->server->secMode,
3444                         pSesInfo->server->capabilities,
3445                         pSesInfo->server->timeZone));
3446                 if (extended_security
3447                                 && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3448                                 && (pSesInfo->server->secType == NTLMSSP)) {
3449                         cFYI(1, ("New style sesssetup "));
3450                         rc = CIFSSpnegoSessSetup(xid, pSesInfo,
3451                                 NULL /* security blob */,
3452                                 0 /* blob length */,
3453                                 nls_info);
3454                 } else if (extended_security
3455                            && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3456                            && (pSesInfo->server->secType == RawNTLMSSP)) {
3457                         cFYI(1, ("NTLMSSP sesssetup "));
3458                         rc = CIFSNTLMSSPNegotiateSessSetup(xid,
3459                                                 pSesInfo,
3460                                                 &ntlmv2_flag,
3461                                                 nls_info);
3462                         if (!rc) {
3463                                 if(ntlmv2_flag) {
3464                                         char * v2_response;
3465                                         cFYI(1,("Can use more secure NTLM version 2 password hash"));
3466                                         if(CalcNTLMv2_partial_mac_key(pSesInfo,
3467                                                 nls_info)) {
3468                                                 rc = -ENOMEM;
3469                                                 goto ss_err_exit;
3470                                         } else
3471                                                 v2_response = kmalloc(16 + 64 /* blob */, GFP_KERNEL);
3472                                         if(v2_response) {
3473                                                 CalcNTLMv2_response(pSesInfo,v2_response);
3474                                 /*              if(first_time)
3475                                                         cifs_calculate_ntlmv2_mac_key(
3476                                                           pSesInfo->server->mac_signing_key,
3477                                                           response, ntlm_session_key, */
3478                                                 kfree(v2_response);
3479                                         /* BB Put dummy sig in SessSetup PDU? */
3480                                         } else {
3481                                                 rc = -ENOMEM;
3482                                                 goto ss_err_exit;
3483                                         }
3484
3485                                 } else {
3486                                         SMBNTencrypt(pSesInfo->password,
3487                                                 pSesInfo->server->cryptKey,
3488                                                 ntlm_session_key);
3489
3490                                         if(first_time)
3491                                                 cifs_calculate_mac_key(
3492                                                         pSesInfo->server->mac_signing_key,
3493                                                         ntlm_session_key,
3494                                                         pSesInfo->password);
3495                                 }
3496                         /* for better security the weaker lanman hash not sent
3497                            in AuthSessSetup so we no longer calculate it */
3498
3499                                 rc = CIFSNTLMSSPAuthSessSetup(xid,
3500                                         pSesInfo,
3501                                         ntlm_session_key,
3502                                         ntlmv2_flag,
3503                                         nls_info);
3504                         }
3505                 } else { /* old style NTLM 0.12 session setup */
3506                         SMBNTencrypt(pSesInfo->password,
3507                                 pSesInfo->server->cryptKey,
3508                                 ntlm_session_key);
3509
3510                         if(first_time)
3511                                 cifs_calculate_mac_key(
3512                                         pSesInfo->server->mac_signing_key,
3513                                         ntlm_session_key, pSesInfo->password);
3514
3515                         rc = CIFSSessSetup(xid, pSesInfo,
3516                                 ntlm_session_key, nls_info);
3517                 }
3518                 if (rc) {
3519                         cERROR(1,("Send error in SessSetup = %d",rc));
3520                 } else {
3521                         cFYI(1,("CIFS Session Established successfully"));
3522                         pSesInfo->status = CifsGood;
3523                 }
3524         }
3525 ss_err_exit:
3526         return rc;
3527 }
3528