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 = CIFSMaxBufSize; /* default */
1789                 if(cifs_sb->rsize < PAGE_CACHE_SIZE) {
1790                         cifs_sb->rsize = PAGE_CACHE_SIZE;
1791                         /* Windows ME does this */
1792                         cFYI(1,("Attempt to set readsize for mount to less than one page (4096)"));
1793                 }
1794                 cifs_sb->mnt_uid = volume_info.linux_uid;
1795                 cifs_sb->mnt_gid = volume_info.linux_gid;
1796                 cifs_sb->mnt_file_mode = volume_info.file_mode;
1797                 cifs_sb->mnt_dir_mode = volume_info.dir_mode;
1798                 cFYI(1,("file mode: 0x%x  dir mode: 0x%x",cifs_sb->mnt_file_mode,cifs_sb->mnt_dir_mode));
1799
1800                 if(volume_info.noperm)
1801                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
1802                 if(volume_info.setuids)
1803                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
1804                 if(volume_info.server_ino)
1805                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
1806                 if(volume_info.remap)
1807                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
1808                 if(volume_info.no_xattr)
1809                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
1810                 if(volume_info.sfu_emul)
1811                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
1812                 if(volume_info.nobrl)
1813                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
1814                 if(volume_info.cifs_acl)
1815                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
1816
1817                 if(volume_info.direct_io) {
1818                         cFYI(1,("mounting share using direct i/o"));
1819                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
1820                 }
1821
1822                 tcon =
1823                     find_unc(sin_server.sin_addr.s_addr, volume_info.UNC,
1824                              volume_info.username);
1825                 if (tcon) {
1826                         cFYI(1, ("Found match on UNC path"));
1827                         /* we can have only one retry value for a connection
1828                            to a share so for resources mounted more than once
1829                            to the same server share the last value passed in
1830                            for the retry flag is used */
1831                         tcon->retry = volume_info.retry;
1832                         tcon->nocase = volume_info.nocase;
1833                 } else {
1834                         tcon = tconInfoAlloc();
1835                         if (tcon == NULL)
1836                                 rc = -ENOMEM;
1837                         else {
1838                                 /* check for null share name ie connect to dfs root */
1839
1840                                 /* BB check if this works for exactly length three strings */
1841                                 if ((strchr(volume_info.UNC + 3, '\\') == NULL)
1842                                     && (strchr(volume_info.UNC + 3, '/') ==
1843                                         NULL)) {
1844                                         rc = connect_to_dfs_path(xid, pSesInfo,
1845                                                         "", cifs_sb->local_nls,
1846                                                         cifs_sb->mnt_cifs_flags &
1847                                                           CIFS_MOUNT_MAP_SPECIAL_CHR);
1848                                         kfree(volume_info.UNC);
1849                                         FreeXid(xid);
1850                                         return -ENODEV;
1851                                 } else {
1852                                         rc = CIFSTCon(xid, pSesInfo,
1853                                                 volume_info.UNC,
1854                                                 tcon, cifs_sb->local_nls);
1855                                         cFYI(1, ("CIFS Tcon rc = %d", rc));
1856                                 }
1857                                 if (!rc) {
1858                                         atomic_inc(&pSesInfo->inUse);
1859                                         tcon->retry = volume_info.retry;
1860                                         tcon->nocase = volume_info.nocase;
1861                                 }
1862                         }
1863                 }
1864         }
1865         if(pSesInfo) {
1866                 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
1867                         sb->s_maxbytes = (u64) 1 << 63;
1868                 } else
1869                         sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
1870         }
1871
1872         sb->s_time_gran = 100;
1873
1874 /* on error free sesinfo and tcon struct if needed */
1875         if (rc) {
1876                 /* if session setup failed, use count is zero but
1877                 we still need to free cifsd thread */
1878                 if(atomic_read(&srvTcp->socketUseCount) == 0) {
1879                         spin_lock(&GlobalMid_Lock);
1880                         srvTcp->tcpStatus = CifsExiting;
1881                         spin_unlock(&GlobalMid_Lock);
1882                         if(srvTcp->tsk) {
1883                                 send_sig(SIGKILL,srvTcp->tsk,1);
1884                                 wait_for_completion(&cifsd_complete);
1885                         }
1886                 }
1887                  /* If find_unc succeeded then rc == 0 so we can not end */
1888                 if (tcon)  /* up accidently freeing someone elses tcon struct */
1889                         tconInfoFree(tcon);
1890                 if (existingCifsSes == NULL) {
1891                         if (pSesInfo) {
1892                                 if ((pSesInfo->server) &&
1893                                     (pSesInfo->status == CifsGood)) {
1894                                         int temp_rc;
1895                                         temp_rc = CIFSSMBLogoff(xid, pSesInfo);
1896                                         /* if the socketUseCount is now zero */
1897                                         if((temp_rc == -ESHUTDOWN) &&
1898                                            (pSesInfo->server->tsk)) {
1899                                                 send_sig(SIGKILL,pSesInfo->server->tsk,1);
1900                                                 wait_for_completion(&cifsd_complete);
1901                                         }
1902                                 } else
1903                                         cFYI(1, ("No session or bad tcon"));
1904                                 sesInfoFree(pSesInfo);
1905                                 /* pSesInfo = NULL; */
1906                         }
1907                 }
1908         } else {
1909                 atomic_inc(&tcon->useCount);
1910                 cifs_sb->tcon = tcon;
1911                 tcon->ses = pSesInfo;
1912
1913                 /* do not care if following two calls succeed - informational only */
1914                 CIFSSMBQFSDeviceInfo(xid, tcon);
1915                 CIFSSMBQFSAttributeInfo(xid, tcon);
1916                 if (tcon->ses->capabilities & CAP_UNIX) {
1917                         if(!CIFSSMBQFSUnixInfo(xid, tcon)) {
1918                                 if(!volume_info.no_psx_acl) {
1919                                         if(CIFS_UNIX_POSIX_ACL_CAP &
1920                                            le64_to_cpu(tcon->fsUnixInfo.Capability))
1921                                                 cFYI(1,("server negotiated posix acl support"));
1922                                                 sb->s_flags |= MS_POSIXACL;
1923                                 }
1924
1925                                 /* Try and negotiate POSIX pathnames if we can. */
1926                                 if (volume_info.posix_paths && (CIFS_UNIX_POSIX_PATHNAMES_CAP &
1927                                     le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1928                                         if (!CIFSSMBSetFSUnixInfo(xid, tcon, CIFS_UNIX_POSIX_PATHNAMES_CAP))  {
1929                                                 cFYI(1,("negotiated posix pathnames support"));
1930                                                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_POSIX_PATHS;
1931                                         } else {
1932                                                 cFYI(1,("posix pathnames support requested but not supported"));
1933                                         }
1934                                 }
1935                         }
1936                 }
1937                 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
1938                         cifs_sb->wsize = min(cifs_sb->wsize,
1939                                              (tcon->ses->server->maxBuf -
1940                                               MAX_CIFS_HDR_SIZE));
1941                 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
1942                         cifs_sb->rsize = min(cifs_sb->rsize,
1943                                              (tcon->ses->server->maxBuf -
1944                                               MAX_CIFS_HDR_SIZE));
1945         }
1946
1947         /* volume_info.password is freed above when existing session found
1948         (in which case it is not needed anymore) but when new sesion is created
1949         the password ptr is put in the new session structure (in which case the
1950         password will be freed at unmount time) */
1951         kfree(volume_info.UNC);
1952         FreeXid(xid);
1953         return rc;
1954 }
1955
1956 static int
1957 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
1958               char session_key[CIFS_SESSION_KEY_SIZE],
1959               const struct nls_table *nls_codepage)
1960 {
1961         struct smb_hdr *smb_buffer;
1962         struct smb_hdr *smb_buffer_response;
1963         SESSION_SETUP_ANDX *pSMB;
1964         SESSION_SETUP_ANDX *pSMBr;
1965         char *bcc_ptr;
1966         char *user;
1967         char *domain;
1968         int rc = 0;
1969         int remaining_words = 0;
1970         int bytes_returned = 0;
1971         int len;
1972         __u32 capabilities;
1973         __u16 count;
1974
1975         cFYI(1, ("In sesssetup "));
1976         if(ses == NULL)
1977                 return -EINVAL;
1978         user = ses->userName;
1979         domain = ses->domainName;
1980         smb_buffer = cifs_buf_get();
1981         if (smb_buffer == NULL) {
1982                 return -ENOMEM;
1983         }
1984         smb_buffer_response = smb_buffer;
1985         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
1986
1987         /* send SMBsessionSetup here */
1988         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
1989                         NULL /* no tCon exists yet */ , 13 /* wct */ );
1990
1991         smb_buffer->Mid = GetNextMid(ses->server);
1992         pSMB->req_no_secext.AndXCommand = 0xFF;
1993         pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
1994         pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
1995
1996         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
1997                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
1998
1999         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2000                 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2001         if (ses->capabilities & CAP_UNICODE) {
2002                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2003                 capabilities |= CAP_UNICODE;
2004         }
2005         if (ses->capabilities & CAP_STATUS32) {
2006                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2007                 capabilities |= CAP_STATUS32;
2008         }
2009         if (ses->capabilities & CAP_DFS) {
2010                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2011                 capabilities |= CAP_DFS;
2012         }
2013         pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2014
2015         pSMB->req_no_secext.CaseInsensitivePasswordLength =
2016                 cpu_to_le16(CIFS_SESSION_KEY_SIZE);
2017
2018         pSMB->req_no_secext.CaseSensitivePasswordLength =
2019             cpu_to_le16(CIFS_SESSION_KEY_SIZE);
2020         bcc_ptr = pByteArea(smb_buffer);
2021         memcpy(bcc_ptr, (char *) session_key, CIFS_SESSION_KEY_SIZE);
2022         bcc_ptr += CIFS_SESSION_KEY_SIZE;
2023         memcpy(bcc_ptr, (char *) session_key, CIFS_SESSION_KEY_SIZE);
2024         bcc_ptr += CIFS_SESSION_KEY_SIZE;
2025
2026         if (ses->capabilities & CAP_UNICODE) {
2027                 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2028                         *bcc_ptr = 0;
2029                         bcc_ptr++;
2030                 }
2031                 if(user == NULL)
2032                         bytes_returned = 0; /* skill null user */
2033                 else
2034                         bytes_returned =
2035                                 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2036                                         nls_codepage);
2037                 /* convert number of 16 bit words to bytes */
2038                 bcc_ptr += 2 * bytes_returned;
2039                 bcc_ptr += 2;   /* trailing null */
2040                 if (domain == NULL)
2041                         bytes_returned =
2042                             cifs_strtoUCS((__le16 *) bcc_ptr,
2043                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2044                 else
2045                         bytes_returned =
2046                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2047                                           nls_codepage);
2048                 bcc_ptr += 2 * bytes_returned;
2049                 bcc_ptr += 2;
2050                 bytes_returned =
2051                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2052                                   32, nls_codepage);
2053                 bcc_ptr += 2 * bytes_returned;
2054                 bytes_returned =
2055                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release,
2056                                   32, nls_codepage);
2057                 bcc_ptr += 2 * bytes_returned;
2058                 bcc_ptr += 2;
2059                 bytes_returned =
2060                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2061                                   64, nls_codepage);
2062                 bcc_ptr += 2 * bytes_returned;
2063                 bcc_ptr += 2;
2064         } else {
2065                 if(user != NULL) {
2066                     strncpy(bcc_ptr, user, 200);
2067                     bcc_ptr += strnlen(user, 200);
2068                 }
2069                 *bcc_ptr = 0;
2070                 bcc_ptr++;
2071                 if (domain == NULL) {
2072                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2073                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2074                 } else {
2075                         strncpy(bcc_ptr, domain, 64);
2076                         bcc_ptr += strnlen(domain, 64);
2077                         *bcc_ptr = 0;
2078                         bcc_ptr++;
2079                 }
2080                 strcpy(bcc_ptr, "Linux version ");
2081                 bcc_ptr += strlen("Linux version ");
2082                 strcpy(bcc_ptr, system_utsname.release);
2083                 bcc_ptr += strlen(system_utsname.release) + 1;
2084                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2085                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2086         }
2087         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2088         smb_buffer->smb_buf_length += count;
2089         pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2090
2091         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2092                          &bytes_returned, 1);
2093         if (rc) {
2094 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2095         } else if ((smb_buffer_response->WordCount == 3)
2096                    || (smb_buffer_response->WordCount == 4)) {
2097                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2098                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2099                 if (action & GUEST_LOGIN)
2100                         cFYI(1, (" Guest login"));      /* do we want to mark SesInfo struct ? */
2101                 ses->Suid = smb_buffer_response->Uid;   /* UID left in wire format (le) */
2102                 cFYI(1, ("UID = %d ", ses->Suid));
2103          /* response can have either 3 or 4 word count - Samba sends 3 */
2104                 bcc_ptr = pByteArea(smb_buffer_response);
2105                 if ((pSMBr->resp.hdr.WordCount == 3)
2106                     || ((pSMBr->resp.hdr.WordCount == 4)
2107                         && (blob_len < pSMBr->resp.ByteCount))) {
2108                         if (pSMBr->resp.hdr.WordCount == 4)
2109                                 bcc_ptr += blob_len;
2110
2111                         if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2112                                 if ((long) (bcc_ptr) % 2) {
2113                                         remaining_words =
2114                                             (BCC(smb_buffer_response) - 1) /2;
2115                                         bcc_ptr++;      /* Unicode strings must be word aligned */
2116                                 } else {
2117                                         remaining_words =
2118                                                 BCC(smb_buffer_response) / 2;
2119                                 }
2120                                 len =
2121                                     UniStrnlen((wchar_t *) bcc_ptr,
2122                                                remaining_words - 1);
2123 /* We look for obvious messed up bcc or strings in response so we do not go off
2124    the end since (at least) WIN2K and Windows XP have a major bug in not null
2125    terminating last Unicode string in response  */
2126                                 ses->serverOS = kzalloc(2 * (len + 1), GFP_KERNEL);
2127                                 if(ses->serverOS == NULL)
2128                                         goto sesssetup_nomem;
2129                                 cifs_strfromUCS_le(ses->serverOS,
2130                                            (__le16 *)bcc_ptr, len,nls_codepage);
2131                                 bcc_ptr += 2 * (len + 1);
2132                                 remaining_words -= len + 1;
2133                                 ses->serverOS[2 * len] = 0;
2134                                 ses->serverOS[1 + (2 * len)] = 0;
2135                                 if (remaining_words > 0) {
2136                                         len = UniStrnlen((wchar_t *)bcc_ptr,
2137                                                          remaining_words-1);
2138                                         ses->serverNOS = kzalloc(2 * (len + 1),GFP_KERNEL);
2139                                         if(ses->serverNOS == NULL)
2140                                                 goto sesssetup_nomem;
2141                                         cifs_strfromUCS_le(ses->serverNOS,
2142                                                            (__le16 *)bcc_ptr,len,nls_codepage);
2143                                         bcc_ptr += 2 * (len + 1);
2144                                         ses->serverNOS[2 * len] = 0;
2145                                         ses->serverNOS[1 + (2 * len)] = 0;
2146                                         if(strncmp(ses->serverNOS,
2147                                                 "NT LAN Manager 4",16) == 0) {
2148                                                 cFYI(1,("NT4 server"));
2149                                                 ses->flags |= CIFS_SES_NT4;
2150                                         }
2151                                         remaining_words -= len + 1;
2152                                         if (remaining_words > 0) {
2153                                                 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2154           /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2155                                                 ses->serverDomain =
2156                                                     kzalloc(2*(len+1),GFP_KERNEL);
2157                                                 if(ses->serverDomain == NULL)
2158                                                         goto sesssetup_nomem;
2159                                                 cifs_strfromUCS_le(ses->serverDomain,
2160                                                      (__le16 *)bcc_ptr,len,nls_codepage);
2161                                                 bcc_ptr += 2 * (len + 1);
2162                                                 ses->serverDomain[2*len] = 0;
2163                                                 ses->serverDomain[1+(2*len)] = 0;
2164                                         } /* else no more room so create dummy domain string */
2165                                         else
2166                                                 ses->serverDomain =
2167                                                         kzalloc(2, GFP_KERNEL);
2168                                 } else {        /* no room so create dummy domain and NOS string */
2169                                         /* if these kcallocs fail not much we
2170                                            can do, but better to not fail the
2171                                            sesssetup itself */
2172                                         ses->serverDomain =
2173                                             kzalloc(2, GFP_KERNEL);
2174                                         ses->serverNOS =
2175                                             kzalloc(2, GFP_KERNEL);
2176                                 }
2177                         } else {        /* ASCII */
2178                                 len = strnlen(bcc_ptr, 1024);
2179                                 if (((long) bcc_ptr + len) - (long)
2180                                     pByteArea(smb_buffer_response)
2181                                             <= BCC(smb_buffer_response)) {
2182                                         ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
2183                                         if(ses->serverOS == NULL)
2184                                                 goto sesssetup_nomem;
2185                                         strncpy(ses->serverOS,bcc_ptr, len);
2186
2187                                         bcc_ptr += len;
2188                                         bcc_ptr[0] = 0; /* null terminate the string */
2189                                         bcc_ptr++;
2190
2191                                         len = strnlen(bcc_ptr, 1024);
2192                                         ses->serverNOS = kzalloc(len + 1,GFP_KERNEL);
2193                                         if(ses->serverNOS == NULL)
2194                                                 goto sesssetup_nomem;
2195                                         strncpy(ses->serverNOS, bcc_ptr, len);
2196                                         bcc_ptr += len;
2197                                         bcc_ptr[0] = 0;
2198                                         bcc_ptr++;
2199
2200                                         len = strnlen(bcc_ptr, 1024);
2201                                         ses->serverDomain = kzalloc(len + 1,GFP_KERNEL);
2202                                         if(ses->serverDomain == NULL)
2203                                                 goto sesssetup_nomem;
2204                                         strncpy(ses->serverDomain, bcc_ptr, len);
2205                                         bcc_ptr += len;
2206                                         bcc_ptr[0] = 0;
2207                                         bcc_ptr++;
2208                                 } else
2209                                         cFYI(1,
2210                                              ("Variable field of length %d extends beyond end of smb ",
2211                                               len));
2212                         }
2213                 } else {
2214                         cERROR(1,
2215                                (" Security Blob Length extends beyond end of SMB"));
2216                 }
2217         } else {
2218                 cERROR(1,
2219                        (" Invalid Word count %d: ",
2220                         smb_buffer_response->WordCount));
2221                 rc = -EIO;
2222         }
2223 sesssetup_nomem:        /* do not return an error on nomem for the info strings,
2224                            since that could make reconnection harder, and
2225                            reconnection might be needed to free memory */
2226         if (smb_buffer)
2227                 cifs_buf_release(smb_buffer);
2228
2229         return rc;
2230 }
2231
2232 static int
2233 CIFSSpnegoSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2234                 char *SecurityBlob,int SecurityBlobLength,
2235                 const struct nls_table *nls_codepage)
2236 {
2237         struct smb_hdr *smb_buffer;
2238         struct smb_hdr *smb_buffer_response;
2239         SESSION_SETUP_ANDX *pSMB;
2240         SESSION_SETUP_ANDX *pSMBr;
2241         char *bcc_ptr;
2242         char *user;
2243         char *domain;
2244         int rc = 0;
2245         int remaining_words = 0;
2246         int bytes_returned = 0;
2247         int len;
2248         __u32 capabilities;
2249         __u16 count;
2250
2251         cFYI(1, ("In spnego sesssetup "));
2252         if(ses == NULL)
2253                 return -EINVAL;
2254         user = ses->userName;
2255         domain = ses->domainName;
2256
2257         smb_buffer = cifs_buf_get();
2258         if (smb_buffer == NULL) {
2259                 return -ENOMEM;
2260         }
2261         smb_buffer_response = smb_buffer;
2262         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2263
2264         /* send SMBsessionSetup here */
2265         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2266                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2267
2268         smb_buffer->Mid = GetNextMid(ses->server);
2269         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2270         pSMB->req.AndXCommand = 0xFF;
2271         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2272         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2273
2274         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2275                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2276
2277         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2278             CAP_EXTENDED_SECURITY;
2279         if (ses->capabilities & CAP_UNICODE) {
2280                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2281                 capabilities |= CAP_UNICODE;
2282         }
2283         if (ses->capabilities & CAP_STATUS32) {
2284                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2285                 capabilities |= CAP_STATUS32;
2286         }
2287         if (ses->capabilities & CAP_DFS) {
2288                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2289                 capabilities |= CAP_DFS;
2290         }
2291         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2292
2293         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2294         bcc_ptr = pByteArea(smb_buffer);
2295         memcpy(bcc_ptr, SecurityBlob, SecurityBlobLength);
2296         bcc_ptr += SecurityBlobLength;
2297
2298         if (ses->capabilities & CAP_UNICODE) {
2299                 if ((long) bcc_ptr % 2) {       /* must be word aligned for Unicode strings */
2300                         *bcc_ptr = 0;
2301                         bcc_ptr++;
2302                 }
2303                 bytes_returned =
2304                     cifs_strtoUCS((__le16 *) bcc_ptr, user, 100, nls_codepage);
2305                 bcc_ptr += 2 * bytes_returned;  /* convert num of 16 bit words to bytes */
2306                 bcc_ptr += 2;   /* trailing null */
2307                 if (domain == NULL)
2308                         bytes_returned =
2309                             cifs_strtoUCS((__le16 *) bcc_ptr,
2310                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2311                 else
2312                         bytes_returned =
2313                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2314                                           nls_codepage);
2315                 bcc_ptr += 2 * bytes_returned;
2316                 bcc_ptr += 2;
2317                 bytes_returned =
2318                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2319                                   32, nls_codepage);
2320                 bcc_ptr += 2 * bytes_returned;
2321                 bytes_returned =
2322                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release, 32,
2323                                   nls_codepage);
2324                 bcc_ptr += 2 * bytes_returned;
2325                 bcc_ptr += 2;
2326                 bytes_returned =
2327                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2328                                   64, nls_codepage);
2329                 bcc_ptr += 2 * bytes_returned;
2330                 bcc_ptr += 2;
2331         } else {
2332                 strncpy(bcc_ptr, user, 200);
2333                 bcc_ptr += strnlen(user, 200);
2334                 *bcc_ptr = 0;
2335                 bcc_ptr++;
2336                 if (domain == NULL) {
2337                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2338                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2339                 } else {
2340                         strncpy(bcc_ptr, domain, 64);
2341                         bcc_ptr += strnlen(domain, 64);
2342                         *bcc_ptr = 0;
2343                         bcc_ptr++;
2344                 }
2345                 strcpy(bcc_ptr, "Linux version ");
2346                 bcc_ptr += strlen("Linux version ");
2347                 strcpy(bcc_ptr, system_utsname.release);
2348                 bcc_ptr += strlen(system_utsname.release) + 1;
2349                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2350                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2351         }
2352         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2353         smb_buffer->smb_buf_length += count;
2354         pSMB->req.ByteCount = cpu_to_le16(count);
2355
2356         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2357                          &bytes_returned, 1);
2358         if (rc) {
2359 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2360         } else if ((smb_buffer_response->WordCount == 3)
2361                    || (smb_buffer_response->WordCount == 4)) {
2362                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2363                 __u16 blob_len =
2364                     le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2365                 if (action & GUEST_LOGIN)
2366                         cFYI(1, (" Guest login"));      /* BB do we want to set anything in SesInfo struct ? */
2367                 if (ses) {
2368                         ses->Suid = smb_buffer_response->Uid;   /* UID left in wire format (le) */
2369                         cFYI(1, ("UID = %d ", ses->Suid));
2370                         bcc_ptr = pByteArea(smb_buffer_response);       /* response can have either 3 or 4 word count - Samba sends 3 */
2371
2372                         /* BB Fix below to make endian neutral !! */
2373
2374                         if ((pSMBr->resp.hdr.WordCount == 3)
2375                             || ((pSMBr->resp.hdr.WordCount == 4)
2376                                 && (blob_len <
2377                                     pSMBr->resp.ByteCount))) {
2378                                 if (pSMBr->resp.hdr.WordCount == 4) {
2379                                         bcc_ptr +=
2380                                             blob_len;
2381                                         cFYI(1,
2382                                              ("Security Blob Length %d ",
2383                                               blob_len));
2384                                 }
2385
2386                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2387                                         if ((long) (bcc_ptr) % 2) {
2388                                                 remaining_words =
2389                                                     (BCC(smb_buffer_response)
2390                                                      - 1) / 2;
2391                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
2392                                         } else {
2393                                                 remaining_words =
2394                                                     BCC
2395                                                     (smb_buffer_response) / 2;
2396                                         }
2397                                         len =
2398                                             UniStrnlen((wchar_t *) bcc_ptr,
2399                                                        remaining_words - 1);
2400 /* We look for obvious messed up bcc or strings in response so we do not go off
2401    the end since (at least) WIN2K and Windows XP have a major bug in not null
2402    terminating last Unicode string in response  */
2403                                         ses->serverOS =
2404                                             kzalloc(2 * (len + 1), GFP_KERNEL);
2405                                         cifs_strfromUCS_le(ses->serverOS,
2406                                                            (__le16 *)
2407                                                            bcc_ptr, len,
2408                                                            nls_codepage);
2409                                         bcc_ptr += 2 * (len + 1);
2410                                         remaining_words -= len + 1;
2411                                         ses->serverOS[2 * len] = 0;
2412                                         ses->serverOS[1 + (2 * len)] = 0;
2413                                         if (remaining_words > 0) {
2414                                                 len = UniStrnlen((wchar_t *)bcc_ptr,
2415                                                                  remaining_words
2416                                                                  - 1);
2417                                                 ses->serverNOS =
2418                                                     kzalloc(2 * (len + 1),
2419                                                             GFP_KERNEL);
2420                                                 cifs_strfromUCS_le(ses->serverNOS,
2421                                                                    (__le16 *)bcc_ptr,
2422                                                                    len,
2423                                                                    nls_codepage);
2424                                                 bcc_ptr += 2 * (len + 1);
2425                                                 ses->serverNOS[2 * len] = 0;
2426                                                 ses->serverNOS[1 + (2 * len)] = 0;
2427                                                 remaining_words -= len + 1;
2428                                                 if (remaining_words > 0) {
2429                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2430                             /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2431                                                         ses->serverDomain = kzalloc(2*(len+1),GFP_KERNEL);
2432                                                         cifs_strfromUCS_le(ses->serverDomain,
2433                                                              (__le16 *)bcc_ptr,
2434                                                              len, nls_codepage);
2435                                                         bcc_ptr += 2*(len+1);
2436                                                         ses->serverDomain[2*len] = 0;
2437                                                         ses->serverDomain[1+(2*len)] = 0;
2438                                                 } /* else no more room so create dummy domain string */
2439                                                 else
2440                                                         ses->serverDomain =
2441                                                             kzalloc(2,GFP_KERNEL);
2442                                         } else {        /* no room so create dummy domain and NOS string */
2443                                                 ses->serverDomain = kzalloc(2, GFP_KERNEL);
2444                                                 ses->serverNOS = kzalloc(2, GFP_KERNEL);
2445                                         }
2446                                 } else {        /* ASCII */
2447
2448                                         len = strnlen(bcc_ptr, 1024);
2449                                         if (((long) bcc_ptr + len) - (long)
2450                                             pByteArea(smb_buffer_response)
2451                                             <= BCC(smb_buffer_response)) {
2452                                                 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
2453                                                 strncpy(ses->serverOS, bcc_ptr, len);
2454
2455                                                 bcc_ptr += len;
2456                                                 bcc_ptr[0] = 0; /* null terminate the string */
2457                                                 bcc_ptr++;
2458
2459                                                 len = strnlen(bcc_ptr, 1024);
2460                                                 ses->serverNOS = kzalloc(len + 1,GFP_KERNEL);
2461                                                 strncpy(ses->serverNOS, bcc_ptr, len);
2462                                                 bcc_ptr += len;
2463                                                 bcc_ptr[0] = 0;
2464                                                 bcc_ptr++;
2465
2466                                                 len = strnlen(bcc_ptr, 1024);
2467                                                 ses->serverDomain = kzalloc(len + 1, GFP_KERNEL);
2468                                                 strncpy(ses->serverDomain, bcc_ptr, len);
2469                                                 bcc_ptr += len;
2470                                                 bcc_ptr[0] = 0;
2471                                                 bcc_ptr++;
2472                                         } else
2473                                                 cFYI(1,
2474                                                      ("Variable field of length %d extends beyond end of smb ",
2475                                                       len));
2476                                 }
2477                         } else {
2478                                 cERROR(1,
2479                                        (" Security Blob Length extends beyond end of SMB"));
2480                         }
2481                 } else {
2482                         cERROR(1, ("No session structure passed in."));
2483                 }
2484         } else {
2485                 cERROR(1,
2486                        (" Invalid Word count %d: ",
2487                         smb_buffer_response->WordCount));
2488                 rc = -EIO;
2489         }
2490
2491         if (smb_buffer)
2492                 cifs_buf_release(smb_buffer);
2493
2494         return rc;
2495 }
2496
2497 static int
2498 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2499                               struct cifsSesInfo *ses, int * pNTLMv2_flag,
2500                               const struct nls_table *nls_codepage)
2501 {
2502         struct smb_hdr *smb_buffer;
2503         struct smb_hdr *smb_buffer_response;
2504         SESSION_SETUP_ANDX *pSMB;
2505         SESSION_SETUP_ANDX *pSMBr;
2506         char *bcc_ptr;
2507         char *domain;
2508         int rc = 0;
2509         int remaining_words = 0;
2510         int bytes_returned = 0;
2511         int len;
2512         int SecurityBlobLength = sizeof (NEGOTIATE_MESSAGE);
2513         PNEGOTIATE_MESSAGE SecurityBlob;
2514         PCHALLENGE_MESSAGE SecurityBlob2;
2515         __u32 negotiate_flags, capabilities;
2516         __u16 count;
2517
2518         cFYI(1, ("In NTLMSSP sesssetup (negotiate) "));
2519         if(ses == NULL)
2520                 return -EINVAL;
2521         domain = ses->domainName;
2522         *pNTLMv2_flag = FALSE;
2523         smb_buffer = cifs_buf_get();
2524         if (smb_buffer == NULL) {
2525                 return -ENOMEM;
2526         }
2527         smb_buffer_response = smb_buffer;
2528         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2529         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2530
2531         /* send SMBsessionSetup here */
2532         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2533                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2534
2535         smb_buffer->Mid = GetNextMid(ses->server);
2536         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2537         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2538
2539         pSMB->req.AndXCommand = 0xFF;
2540         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2541         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2542
2543         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2544                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2545
2546         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2547             CAP_EXTENDED_SECURITY;
2548         if (ses->capabilities & CAP_UNICODE) {
2549                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2550                 capabilities |= CAP_UNICODE;
2551         }
2552         if (ses->capabilities & CAP_STATUS32) {
2553                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2554                 capabilities |= CAP_STATUS32;
2555         }
2556         if (ses->capabilities & CAP_DFS) {
2557                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2558                 capabilities |= CAP_DFS;
2559         }
2560         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2561
2562         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2563         SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2564         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2565         SecurityBlob->MessageType = NtLmNegotiate;
2566         negotiate_flags =
2567             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2568             NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM | 0x80000000 |
2569             /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2570         if(sign_CIFS_PDUs)
2571                 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2572         if(ntlmv2_support)
2573                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
2574         /* setup pointers to domain name and workstation name */
2575         bcc_ptr += SecurityBlobLength;
2576
2577         SecurityBlob->WorkstationName.Buffer = 0;
2578         SecurityBlob->WorkstationName.Length = 0;
2579         SecurityBlob->WorkstationName.MaximumLength = 0;
2580
2581         if (domain == NULL) {
2582                 SecurityBlob->DomainName.Buffer = 0;
2583                 SecurityBlob->DomainName.Length = 0;
2584                 SecurityBlob->DomainName.MaximumLength = 0;
2585         } else {
2586                 __u16 len;
2587                 negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
2588                 strncpy(bcc_ptr, domain, 63);
2589                 len = strnlen(domain, 64);
2590                 SecurityBlob->DomainName.MaximumLength =
2591                     cpu_to_le16(len);
2592                 SecurityBlob->DomainName.Buffer =
2593                     cpu_to_le32((long) &SecurityBlob->
2594                                 DomainString -
2595                                 (long) &SecurityBlob->Signature);
2596                 bcc_ptr += len;
2597                 SecurityBlobLength += len;
2598                 SecurityBlob->DomainName.Length =
2599                     cpu_to_le16(len);
2600         }
2601         if (ses->capabilities & CAP_UNICODE) {
2602                 if ((long) bcc_ptr % 2) {
2603                         *bcc_ptr = 0;
2604                         bcc_ptr++;
2605                 }
2606
2607                 bytes_returned =
2608                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2609                                   32, nls_codepage);
2610                 bcc_ptr += 2 * bytes_returned;
2611                 bytes_returned =
2612                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release, 32,
2613                                   nls_codepage);
2614                 bcc_ptr += 2 * bytes_returned;
2615                 bcc_ptr += 2;   /* null terminate Linux version */
2616                 bytes_returned =
2617                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2618                                   64, nls_codepage);
2619                 bcc_ptr += 2 * bytes_returned;
2620                 *(bcc_ptr + 1) = 0;
2621                 *(bcc_ptr + 2) = 0;
2622                 bcc_ptr += 2;   /* null terminate network opsys string */
2623                 *(bcc_ptr + 1) = 0;
2624                 *(bcc_ptr + 2) = 0;
2625                 bcc_ptr += 2;   /* null domain */
2626         } else {                /* ASCII */
2627                 strcpy(bcc_ptr, "Linux version ");
2628                 bcc_ptr += strlen("Linux version ");
2629                 strcpy(bcc_ptr, system_utsname.release);
2630                 bcc_ptr += strlen(system_utsname.release) + 1;
2631                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2632                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2633                 bcc_ptr++;      /* empty domain field */
2634                 *bcc_ptr = 0;
2635         }
2636         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2637         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2638         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2639         smb_buffer->smb_buf_length += count;
2640         pSMB->req.ByteCount = cpu_to_le16(count);
2641
2642         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2643                          &bytes_returned, 1);
2644
2645         if (smb_buffer_response->Status.CifsError ==
2646             cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
2647                 rc = 0;
2648
2649         if (rc) {
2650 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2651         } else if ((smb_buffer_response->WordCount == 3)
2652                    || (smb_buffer_response->WordCount == 4)) {
2653                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2654                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2655
2656                 if (action & GUEST_LOGIN)
2657                         cFYI(1, (" Guest login"));
2658         /* Do we want to set anything in SesInfo struct when guest login? */
2659
2660                 bcc_ptr = pByteArea(smb_buffer_response);
2661         /* response can have either 3 or 4 word count - Samba sends 3 */
2662
2663                 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
2664                 if (SecurityBlob2->MessageType != NtLmChallenge) {
2665                         cFYI(1,
2666                              ("Unexpected NTLMSSP message type received %d",
2667                               SecurityBlob2->MessageType));
2668                 } else if (ses) {
2669                         ses->Suid = smb_buffer_response->Uid; /* UID left in le format */
2670                         cFYI(1, ("UID = %d ", ses->Suid));
2671                         if ((pSMBr->resp.hdr.WordCount == 3)
2672                             || ((pSMBr->resp.hdr.WordCount == 4)
2673                                 && (blob_len <
2674                                     pSMBr->resp.ByteCount))) {
2675
2676                                 if (pSMBr->resp.hdr.WordCount == 4) {
2677                                         bcc_ptr += blob_len;
2678                                         cFYI(1,
2679                                              ("Security Blob Length %d ",
2680                                               blob_len));
2681                                 }
2682
2683                                 cFYI(1, ("NTLMSSP Challenge rcvd "));
2684
2685                                 memcpy(ses->server->cryptKey,
2686                                        SecurityBlob2->Challenge,
2687                                        CIFS_CRYPTO_KEY_SIZE);
2688                                 if(SecurityBlob2->NegotiateFlags & cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
2689                                         *pNTLMv2_flag = TRUE;
2690
2691                                 if((SecurityBlob2->NegotiateFlags &
2692                                         cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN))
2693                                         || (sign_CIFS_PDUs > 1))
2694                                                 ses->server->secMode |=
2695                                                         SECMODE_SIGN_REQUIRED;
2696                                 if ((SecurityBlob2->NegotiateFlags &
2697                                         cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
2698                                                 ses->server->secMode |=
2699                                                         SECMODE_SIGN_ENABLED;
2700
2701                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2702                                         if ((long) (bcc_ptr) % 2) {
2703                                                 remaining_words =
2704                                                     (BCC(smb_buffer_response)
2705                                                      - 1) / 2;
2706                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
2707                                         } else {
2708                                                 remaining_words =
2709                                                     BCC
2710                                                     (smb_buffer_response) / 2;
2711                                         }
2712                                         len =
2713                                             UniStrnlen((wchar_t *) bcc_ptr,
2714                                                        remaining_words - 1);
2715 /* We look for obvious messed up bcc or strings in response so we do not go off
2716    the end since (at least) WIN2K and Windows XP have a major bug in not null
2717    terminating last Unicode string in response  */
2718                                         ses->serverOS =
2719                                             kzalloc(2 * (len + 1), GFP_KERNEL);
2720                                         cifs_strfromUCS_le(ses->serverOS,
2721                                                            (__le16 *)
2722                                                            bcc_ptr, len,
2723                                                            nls_codepage);
2724                                         bcc_ptr += 2 * (len + 1);
2725                                         remaining_words -= len + 1;
2726                                         ses->serverOS[2 * len] = 0;
2727                                         ses->serverOS[1 + (2 * len)] = 0;
2728                                         if (remaining_words > 0) {
2729                                                 len = UniStrnlen((wchar_t *)
2730                                                                  bcc_ptr,
2731                                                                  remaining_words
2732                                                                  - 1);
2733                                                 ses->serverNOS =
2734                                                     kzalloc(2 * (len + 1),
2735                                                             GFP_KERNEL);
2736                                                 cifs_strfromUCS_le(ses->
2737                                                                    serverNOS,
2738                                                                    (__le16 *)
2739                                                                    bcc_ptr,
2740                                                                    len,
2741                                                                    nls_codepage);
2742                                                 bcc_ptr += 2 * (len + 1);
2743                                                 ses->serverNOS[2 * len] = 0;
2744                                                 ses->serverNOS[1 +
2745                                                                (2 * len)] = 0;
2746                                                 remaining_words -= len + 1;
2747                                                 if (remaining_words > 0) {
2748                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2749            /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2750                                                         ses->serverDomain =
2751                                                             kzalloc(2 *
2752                                                                     (len +
2753                                                                      1),
2754                                                                     GFP_KERNEL);
2755                                                         cifs_strfromUCS_le
2756                                                             (ses->serverDomain,
2757                                                              (__le16 *)bcc_ptr,
2758                                                              len, nls_codepage);
2759                                                         bcc_ptr +=
2760                                                             2 * (len + 1);
2761                                                         ses->serverDomain[2*len]
2762                                                             = 0;
2763                                                         ses->serverDomain
2764                                                                 [1 + (2 * len)]
2765                                                             = 0;
2766                                                 } /* else no more room so create dummy domain string */
2767                                                 else
2768                                                         ses->serverDomain =
2769                                                             kzalloc(2,
2770                                                                     GFP_KERNEL);
2771                                         } else {        /* no room so create dummy domain and NOS string */
2772                                                 ses->serverDomain =
2773                                                     kzalloc(2, GFP_KERNEL);
2774                                                 ses->serverNOS =
2775                                                     kzalloc(2, GFP_KERNEL);
2776                                         }
2777                                 } else {        /* ASCII */
2778                                         len = strnlen(bcc_ptr, 1024);
2779                                         if (((long) bcc_ptr + len) - (long)
2780                                             pByteArea(smb_buffer_response)
2781                                             <= BCC(smb_buffer_response)) {
2782                                                 ses->serverOS =
2783                                                     kzalloc(len + 1,
2784                                                             GFP_KERNEL);
2785                                                 strncpy(ses->serverOS,
2786                                                         bcc_ptr, len);
2787
2788                                                 bcc_ptr += len;
2789                                                 bcc_ptr[0] = 0; /* null terminate string */
2790                                                 bcc_ptr++;
2791
2792                                                 len = strnlen(bcc_ptr, 1024);
2793                                                 ses->serverNOS =
2794                                                     kzalloc(len + 1,
2795                                                             GFP_KERNEL);
2796                                                 strncpy(ses->serverNOS, bcc_ptr, len);
2797                                                 bcc_ptr += len;
2798                                                 bcc_ptr[0] = 0;
2799                                                 bcc_ptr++;
2800
2801                                                 len = strnlen(bcc_ptr, 1024);
2802                                                 ses->serverDomain =
2803                                                     kzalloc(len + 1,
2804                                                             GFP_KERNEL);
2805                                                 strncpy(ses->serverDomain, bcc_ptr, len);
2806                                                 bcc_ptr += len;
2807                                                 bcc_ptr[0] = 0;
2808                                                 bcc_ptr++;
2809                                         } else
2810                                                 cFYI(1,
2811                                                      ("Variable field of length %d extends beyond end of smb ",
2812                                                       len));
2813                                 }
2814                         } else {
2815                                 cERROR(1,
2816                                        (" Security Blob Length extends beyond end of SMB"));
2817                         }
2818                 } else {
2819                         cERROR(1, ("No session structure passed in."));
2820                 }
2821         } else {
2822                 cERROR(1,
2823                        (" Invalid Word count %d: ",
2824                         smb_buffer_response->WordCount));
2825                 rc = -EIO;
2826         }
2827
2828         if (smb_buffer)
2829                 cifs_buf_release(smb_buffer);
2830
2831         return rc;
2832 }
2833 static int
2834 CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2835                 char *ntlm_session_key, int ntlmv2_flag,
2836                 const struct nls_table *nls_codepage)
2837 {
2838         struct smb_hdr *smb_buffer;
2839         struct smb_hdr *smb_buffer_response;
2840         SESSION_SETUP_ANDX *pSMB;
2841         SESSION_SETUP_ANDX *pSMBr;
2842         char *bcc_ptr;
2843         char *user;
2844         char *domain;
2845         int rc = 0;
2846         int remaining_words = 0;
2847         int bytes_returned = 0;
2848         int len;
2849         int SecurityBlobLength = sizeof (AUTHENTICATE_MESSAGE);
2850         PAUTHENTICATE_MESSAGE SecurityBlob;
2851         __u32 negotiate_flags, capabilities;
2852         __u16 count;
2853
2854         cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
2855         if(ses == NULL)
2856                 return -EINVAL;
2857         user = ses->userName;
2858         domain = ses->domainName;
2859         smb_buffer = cifs_buf_get();
2860         if (smb_buffer == NULL) {
2861                 return -ENOMEM;
2862         }
2863         smb_buffer_response = smb_buffer;
2864         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2865         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2866
2867         /* send SMBsessionSetup here */
2868         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2869                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2870
2871         smb_buffer->Mid = GetNextMid(ses->server);
2872         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2873         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2874         pSMB->req.AndXCommand = 0xFF;
2875         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2876         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2877
2878         pSMB->req.hdr.Uid = ses->Suid;
2879
2880         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2881                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2882
2883         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2884             CAP_EXTENDED_SECURITY;
2885         if (ses->capabilities & CAP_UNICODE) {
2886                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2887                 capabilities |= CAP_UNICODE;
2888         }
2889         if (ses->capabilities & CAP_STATUS32) {
2890                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2891                 capabilities |= CAP_STATUS32;
2892         }
2893         if (ses->capabilities & CAP_DFS) {
2894                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2895                 capabilities |= CAP_DFS;
2896         }
2897         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2898
2899         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2900         SecurityBlob = (PAUTHENTICATE_MESSAGE) bcc_ptr;
2901         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2902         SecurityBlob->MessageType = NtLmAuthenticate;
2903         bcc_ptr += SecurityBlobLength;
2904         negotiate_flags =
2905             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
2906             NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
2907             0x80000000 | NTLMSSP_NEGOTIATE_128;
2908         if(sign_CIFS_PDUs)
2909                 negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
2910         if(ntlmv2_flag)
2911                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
2912
2913 /* setup pointers to domain name and workstation name */
2914
2915         SecurityBlob->WorkstationName.Buffer = 0;
2916         SecurityBlob->WorkstationName.Length = 0;
2917         SecurityBlob->WorkstationName.MaximumLength = 0;
2918         SecurityBlob->SessionKey.Length = 0;
2919         SecurityBlob->SessionKey.MaximumLength = 0;
2920         SecurityBlob->SessionKey.Buffer = 0;
2921
2922         SecurityBlob->LmChallengeResponse.Length = 0;
2923         SecurityBlob->LmChallengeResponse.MaximumLength = 0;
2924         SecurityBlob->LmChallengeResponse.Buffer = 0;
2925
2926         SecurityBlob->NtChallengeResponse.Length =
2927             cpu_to_le16(CIFS_SESSION_KEY_SIZE);
2928         SecurityBlob->NtChallengeResponse.MaximumLength =
2929             cpu_to_le16(CIFS_SESSION_KEY_SIZE);
2930         memcpy(bcc_ptr, ntlm_session_key, CIFS_SESSION_KEY_SIZE);
2931         SecurityBlob->NtChallengeResponse.Buffer =
2932             cpu_to_le32(SecurityBlobLength);
2933         SecurityBlobLength += CIFS_SESSION_KEY_SIZE;
2934         bcc_ptr += CIFS_SESSION_KEY_SIZE;
2935
2936         if (ses->capabilities & CAP_UNICODE) {
2937                 if (domain == NULL) {
2938                         SecurityBlob->DomainName.Buffer = 0;
2939                         SecurityBlob->DomainName.Length = 0;
2940                         SecurityBlob->DomainName.MaximumLength = 0;
2941                 } else {
2942                         __u16 len =
2943                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2944                                           nls_codepage);
2945                         len *= 2;
2946                         SecurityBlob->DomainName.MaximumLength =
2947                             cpu_to_le16(len);
2948                         SecurityBlob->DomainName.Buffer =
2949                             cpu_to_le32(SecurityBlobLength);
2950                         bcc_ptr += len;
2951                         SecurityBlobLength += len;
2952                         SecurityBlob->DomainName.Length =
2953                             cpu_to_le16(len);
2954                 }
2955                 if (user == NULL) {
2956                         SecurityBlob->UserName.Buffer = 0;
2957                         SecurityBlob->UserName.Length = 0;
2958                         SecurityBlob->UserName.MaximumLength = 0;
2959                 } else {
2960                         __u16 len =
2961                             cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
2962                                           nls_codepage);
2963                         len *= 2;
2964                         SecurityBlob->UserName.MaximumLength =
2965                             cpu_to_le16(len);
2966                         SecurityBlob->UserName.Buffer =
2967                             cpu_to_le32(SecurityBlobLength);
2968                         bcc_ptr += len;
2969                         SecurityBlobLength += len;
2970                         SecurityBlob->UserName.Length =
2971                             cpu_to_le16(len);
2972                 }
2973
2974                 /* SecurityBlob->WorkstationName.Length = cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
2975                    SecurityBlob->WorkstationName.Length *= 2;
2976                    SecurityBlob->WorkstationName.MaximumLength = cpu_to_le16(SecurityBlob->WorkstationName.Length);
2977                    SecurityBlob->WorkstationName.Buffer = cpu_to_le32(SecurityBlobLength);
2978                    bcc_ptr += SecurityBlob->WorkstationName.Length;
2979                    SecurityBlobLength += SecurityBlob->WorkstationName.Length;
2980                    SecurityBlob->WorkstationName.Length = cpu_to_le16(SecurityBlob->WorkstationName.Length);  */
2981
2982                 if ((long) bcc_ptr % 2) {
2983                         *bcc_ptr = 0;
2984                         bcc_ptr++;
2985                 }
2986                 bytes_returned =
2987                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2988                                   32, nls_codepage);
2989                 bcc_ptr += 2 * bytes_returned;
2990                 bytes_returned =
2991                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release, 32,
2992                                   nls_codepage);
2993                 bcc_ptr += 2 * bytes_returned;
2994                 bcc_ptr += 2;   /* null term version string */
2995                 bytes_returned =
2996                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2997                                   64, nls_codepage);
2998                 bcc_ptr += 2 * bytes_returned;
2999                 *(bcc_ptr + 1) = 0;
3000                 *(bcc_ptr + 2) = 0;
3001                 bcc_ptr += 2;   /* null terminate network opsys string */
3002                 *(bcc_ptr + 1) = 0;
3003                 *(bcc_ptr + 2) = 0;
3004                 bcc_ptr += 2;   /* null domain */
3005         } else {                /* ASCII */
3006                 if (domain == NULL) {
3007                         SecurityBlob->DomainName.Buffer = 0;
3008                         SecurityBlob->DomainName.Length = 0;
3009                         SecurityBlob->DomainName.MaximumLength = 0;
3010                 } else {
3011                         __u16 len;
3012                         negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
3013                         strncpy(bcc_ptr, domain, 63);
3014                         len = strnlen(domain, 64);
3015                         SecurityBlob->DomainName.MaximumLength =
3016                             cpu_to_le16(len);
3017                         SecurityBlob->DomainName.Buffer =
3018                             cpu_to_le32(SecurityBlobLength);
3019                         bcc_ptr += len;
3020                         SecurityBlobLength += len;
3021                         SecurityBlob->DomainName.Length = cpu_to_le16(len);
3022                 }
3023                 if (user == NULL) {
3024                         SecurityBlob->UserName.Buffer = 0;
3025                         SecurityBlob->UserName.Length = 0;
3026                         SecurityBlob->UserName.MaximumLength = 0;
3027                 } else {
3028                         __u16 len;
3029                         strncpy(bcc_ptr, user, 63);
3030                         len = strnlen(user, 64);
3031                         SecurityBlob->UserName.MaximumLength =
3032                             cpu_to_le16(len);
3033                         SecurityBlob->UserName.Buffer =
3034                             cpu_to_le32(SecurityBlobLength);
3035                         bcc_ptr += len;
3036                         SecurityBlobLength += len;
3037                         SecurityBlob->UserName.Length = cpu_to_le16(len);
3038                 }
3039                 /* BB fill in our workstation name if known BB */
3040
3041                 strcpy(bcc_ptr, "Linux version ");
3042                 bcc_ptr += strlen("Linux version ");
3043                 strcpy(bcc_ptr, system_utsname.release);
3044                 bcc_ptr += strlen(system_utsname.release) + 1;
3045                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
3046                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
3047                 bcc_ptr++;      /* null domain */
3048                 *bcc_ptr = 0;
3049         }
3050         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
3051         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
3052         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
3053         smb_buffer->smb_buf_length += count;
3054         pSMB->req.ByteCount = cpu_to_le16(count);
3055
3056         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
3057                          &bytes_returned, 1);
3058         if (rc) {
3059 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
3060         } else if ((smb_buffer_response->WordCount == 3)
3061                    || (smb_buffer_response->WordCount == 4)) {
3062                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
3063                 __u16 blob_len =
3064                     le16_to_cpu(pSMBr->resp.SecurityBlobLength);
3065                 if (action & GUEST_LOGIN)
3066                         cFYI(1, (" Guest login"));      /* BB do we want to set anything in SesInfo struct ? */
3067 /*        if(SecurityBlob2->MessageType != NtLm??){
3068                  cFYI("Unexpected message type on auth response is %d "));
3069         } */
3070                 if (ses) {
3071                         cFYI(1,
3072                              ("Does UID on challenge %d match auth response UID %d ",
3073                               ses->Suid, smb_buffer_response->Uid));
3074                         ses->Suid = smb_buffer_response->Uid; /* UID left in wire format */
3075                         bcc_ptr = pByteArea(smb_buffer_response);
3076             /* response can have either 3 or 4 word count - Samba sends 3 */
3077                         if ((pSMBr->resp.hdr.WordCount == 3)
3078                             || ((pSMBr->resp.hdr.WordCount == 4)
3079                                 && (blob_len <
3080                                     pSMBr->resp.ByteCount))) {
3081                                 if (pSMBr->resp.hdr.WordCount == 4) {
3082                                         bcc_ptr +=
3083                                             blob_len;
3084                                         cFYI(1,
3085                                              ("Security Blob Length %d ",
3086                                               blob_len));
3087                                 }
3088
3089                                 cFYI(1,
3090                                      ("NTLMSSP response to Authenticate "));
3091
3092                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3093                                         if ((long) (bcc_ptr) % 2) {
3094                                                 remaining_words =
3095                                                     (BCC(smb_buffer_response)
3096                                                      - 1) / 2;
3097                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
3098                                         } else {
3099                                                 remaining_words = BCC(smb_buffer_response) / 2;
3100                                         }
3101                                         len =
3102                                             UniStrnlen((wchar_t *) bcc_ptr,remaining_words - 1);
3103 /* We look for obvious messed up bcc or strings in response so we do not go off
3104   the end since (at least) WIN2K and Windows XP have a major bug in not null
3105   terminating last Unicode string in response  */
3106                                         ses->serverOS =
3107                                             kzalloc(2 * (len + 1), GFP_KERNEL);
3108                                         cifs_strfromUCS_le(ses->serverOS,
3109                                                            (__le16 *)
3110                                                            bcc_ptr, len,
3111                                                            nls_codepage);
3112                                         bcc_ptr += 2 * (len + 1);
3113                                         remaining_words -= len + 1;
3114                                         ses->serverOS[2 * len] = 0;
3115                                         ses->serverOS[1 + (2 * len)] = 0;
3116                                         if (remaining_words > 0) {
3117                                                 len = UniStrnlen((wchar_t *)
3118                                                                  bcc_ptr,
3119                                                                  remaining_words
3120                                                                  - 1);
3121                                                 ses->serverNOS =
3122                                                     kzalloc(2 * (len + 1),
3123                                                             GFP_KERNEL);
3124                                                 cifs_strfromUCS_le(ses->
3125                                                                    serverNOS,
3126                                                                    (__le16 *)
3127                                                                    bcc_ptr,
3128                                                                    len,
3129                                                                    nls_codepage);
3130                                                 bcc_ptr += 2 * (len + 1);
3131                                                 ses->serverNOS[2 * len] = 0;
3132                                                 ses->serverNOS[1+(2*len)] = 0;
3133                                                 remaining_words -= len + 1;
3134                                                 if (remaining_words > 0) {
3135                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3136      /* last string not always null terminated (e.g. for Windows XP & 2000) */
3137                                                         ses->serverDomain =
3138                                                             kzalloc(2 *
3139                                                                     (len +
3140                                                                      1),
3141                                                                     GFP_KERNEL);
3142                                                         cifs_strfromUCS_le
3143                                                             (ses->
3144                                                              serverDomain,
3145                                                              (__le16 *)
3146                                                              bcc_ptr, len,
3147                                                              nls_codepage);
3148                                                         bcc_ptr +=
3149                                                             2 * (len + 1);
3150                                                         ses->
3151                                                             serverDomain[2
3152                                                                          * len]
3153                                                             = 0;
3154                                                         ses->
3155                                                             serverDomain[1
3156                                                                          +
3157                                                                          (2
3158                                                                           *
3159                                                                           len)]
3160                                                             = 0;
3161                                                 } /* else no more room so create dummy domain string */
3162                                                 else
3163                                                         ses->serverDomain = kzalloc(2,GFP_KERNEL);
3164                                         } else {  /* no room so create dummy domain and NOS string */
3165                                                 ses->serverDomain = kzalloc(2, GFP_KERNEL);
3166                                                 ses->serverNOS = kzalloc(2, GFP_KERNEL);
3167                                         }
3168                                 } else {        /* ASCII */
3169                                         len = strnlen(bcc_ptr, 1024);
3170                                         if (((long) bcc_ptr + len) -
3171                         (long) pByteArea(smb_buffer_response)
3172                             <= BCC(smb_buffer_response)) {
3173                                                 ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
3174                                                 strncpy(ses->serverOS,bcc_ptr, len);
3175
3176                                                 bcc_ptr += len;
3177                                                 bcc_ptr[0] = 0; /* null terminate the string */
3178                                                 bcc_ptr++;
3179
3180                                                 len = strnlen(bcc_ptr, 1024);
3181                                                 ses->serverNOS = kzalloc(len+1,GFP_KERNEL);
3182                                                 strncpy(ses->serverNOS, bcc_ptr, len);
3183                                                 bcc_ptr += len;
3184                                                 bcc_ptr[0] = 0;
3185                                                 bcc_ptr++;
3186
3187                                                 len = strnlen(bcc_ptr, 1024);
3188                                                 ses->serverDomain = kzalloc(len+1,GFP_KERNEL);
3189                                                 strncpy(ses->serverDomain, bcc_ptr, len);
3190                                                 bcc_ptr += len;
3191                                                 bcc_ptr[0] = 0;
3192                                                 bcc_ptr++;
3193                                         } else
3194                                                 cFYI(1,
3195                                                      ("Variable field of length %d extends beyond end of smb ",
3196                                                       len));
3197                                 }
3198                         } else {
3199                                 cERROR(1,
3200                                        (" Security Blob Length extends beyond end of SMB"));
3201                         }
3202                 } else {
3203                         cERROR(1, ("No session structure passed in."));
3204                 }
3205         } else {
3206                 cERROR(1,
3207                        (" Invalid Word count %d: ",
3208                         smb_buffer_response->WordCount));
3209                 rc = -EIO;
3210         }
3211
3212         if (smb_buffer)
3213                 cifs_buf_release(smb_buffer);
3214
3215         return rc;
3216 }
3217
3218 int
3219 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
3220          const char *tree, struct cifsTconInfo *tcon,
3221          const struct nls_table *nls_codepage)
3222 {
3223         struct smb_hdr *smb_buffer;
3224         struct smb_hdr *smb_buffer_response;
3225         TCONX_REQ *pSMB;
3226         TCONX_RSP *pSMBr;
3227         unsigned char *bcc_ptr;
3228         int rc = 0;
3229         int length;
3230         __u16 count;
3231
3232         if (ses == NULL)
3233                 return -EIO;
3234
3235         smb_buffer = cifs_buf_get();
3236         if (smb_buffer == NULL) {
3237                 return -ENOMEM;
3238         }
3239         smb_buffer_response = smb_buffer;
3240
3241         header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3242                         NULL /*no tid */ , 4 /*wct */ );
3243
3244         smb_buffer->Mid = GetNextMid(ses->server);
3245         smb_buffer->Uid = ses->Suid;
3246         pSMB = (TCONX_REQ *) smb_buffer;
3247         pSMBr = (TCONX_RSP *) smb_buffer_response;
3248
3249         pSMB->AndXCommand = 0xFF;
3250         pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3251         pSMB->PasswordLength = cpu_to_le16(1);  /* minimum */
3252         bcc_ptr = &pSMB->Password[0];
3253         bcc_ptr++;              /* skip password */
3254
3255         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3256                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3257
3258         if (ses->capabilities & CAP_STATUS32) {
3259                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3260         }
3261         if (ses->capabilities & CAP_DFS) {
3262                 smb_buffer->Flags2 |= SMBFLG2_DFS;
3263         }
3264         if (ses->capabilities & CAP_UNICODE) {
3265                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3266                 length =
3267                     cifs_strtoUCS((__le16 *) bcc_ptr, tree, 100, nls_codepage);
3268                 bcc_ptr += 2 * length;  /* convert num of 16 bit words to bytes */
3269                 bcc_ptr += 2;   /* skip trailing null */
3270         } else {                /* ASCII */
3271
3272                 strcpy(bcc_ptr, tree);
3273                 bcc_ptr += strlen(tree) + 1;
3274         }
3275         strcpy(bcc_ptr, "?????");
3276         bcc_ptr += strlen("?????");
3277         bcc_ptr += 1;
3278         count = bcc_ptr - &pSMB->Password[0];
3279         pSMB->hdr.smb_buf_length += count;
3280         pSMB->ByteCount = cpu_to_le16(count);
3281
3282         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, 0);
3283
3284         /* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
3285         /* above now done in SendReceive */
3286         if ((rc == 0) && (tcon != NULL)) {
3287                 tcon->tidStatus = CifsGood;
3288                 tcon->tid = smb_buffer_response->Tid;
3289                 bcc_ptr = pByteArea(smb_buffer_response);
3290                 length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
3291         /* skip service field (NB: this field is always ASCII) */
3292                 bcc_ptr += length + 1;
3293                 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3294                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3295                         length = UniStrnlen((wchar_t *) bcc_ptr, 512);
3296                         if ((bcc_ptr + (2 * length)) -
3297                              pByteArea(smb_buffer_response) <=
3298                             BCC(smb_buffer_response)) {
3299                                 kfree(tcon->nativeFileSystem);
3300                                 tcon->nativeFileSystem =
3301                                     kzalloc(length + 2, GFP_KERNEL);
3302                                 cifs_strfromUCS_le(tcon->nativeFileSystem,
3303                                                    (__le16 *) bcc_ptr,
3304                                                    length, nls_codepage);
3305                                 bcc_ptr += 2 * length;
3306                                 bcc_ptr[0] = 0; /* null terminate the string */
3307                                 bcc_ptr[1] = 0;
3308                                 bcc_ptr += 2;
3309                         }
3310                         /* else do not bother copying these informational fields */
3311                 } else {
3312                         length = strnlen(bcc_ptr, 1024);
3313                         if ((bcc_ptr + length) -
3314                             pByteArea(smb_buffer_response) <=
3315                             BCC(smb_buffer_response)) {
3316                                 kfree(tcon->nativeFileSystem);
3317                                 tcon->nativeFileSystem =
3318                                     kzalloc(length + 1, GFP_KERNEL);
3319                                 strncpy(tcon->nativeFileSystem, bcc_ptr,
3320                                         length);
3321                         }
3322                         /* else do not bother copying these informational fields */
3323                 }
3324                 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3325                 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
3326         } else if ((rc == 0) && tcon == NULL) {
3327         /* all we need to save for IPC$ connection */
3328                 ses->ipc_tid = smb_buffer_response->Tid;
3329         }
3330
3331         if (smb_buffer)
3332                 cifs_buf_release(smb_buffer);
3333         return rc;
3334 }
3335
3336 int
3337 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3338 {
3339         int rc = 0;
3340         int xid;
3341         struct cifsSesInfo *ses = NULL;
3342         struct task_struct *cifsd_task;
3343
3344         xid = GetXid();
3345
3346         if (cifs_sb->tcon) {
3347                 ses = cifs_sb->tcon->ses; /* save ptr to ses before delete tcon!*/
3348                 rc = CIFSSMBTDis(xid, cifs_sb->tcon);
3349                 if (rc == -EBUSY) {
3350                         FreeXid(xid);
3351                         return 0;
3352                 }
3353                 tconInfoFree(cifs_sb->tcon);
3354                 if ((ses) && (ses->server)) {
3355                         /* save off task so we do not refer to ses later */
3356                         cifsd_task = ses->server->tsk;
3357                         cFYI(1, ("About to do SMBLogoff "));
3358                         rc = CIFSSMBLogoff(xid, ses);
3359                         if (rc == -EBUSY) {
3360                                 FreeXid(xid);
3361                                 return 0;
3362                         } else if (rc == -ESHUTDOWN) {
3363                                 cFYI(1,("Waking up socket by sending it signal"));
3364                                 if(cifsd_task) {
3365                                         send_sig(SIGKILL,cifsd_task,1);
3366                                         wait_for_completion(&cifsd_complete);
3367                                 }
3368                                 rc = 0;
3369                         } /* else - we have an smb session
3370                                 left on this socket do not kill cifsd */
3371                 } else
3372                         cFYI(1, ("No session or bad tcon"));
3373         }
3374
3375         cifs_sb->tcon = NULL;
3376         if (ses)
3377                 schedule_timeout_interruptible(msecs_to_jiffies(500));
3378         if (ses)
3379                 sesInfoFree(ses);
3380
3381         FreeXid(xid);
3382         return rc;              /* BB check if we should always return zero here */
3383 }
3384
3385 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3386                                            struct nls_table * nls_info)
3387 {
3388         int rc = 0;
3389         char ntlm_session_key[CIFS_SESSION_KEY_SIZE];
3390         int ntlmv2_flag = FALSE;
3391         int first_time = 0;
3392
3393         /* what if server changes its buffer size after dropping the session? */
3394         if(pSesInfo->server->maxBuf == 0) /* no need to send on reconnect */ {
3395                 rc = CIFSSMBNegotiate(xid, pSesInfo);
3396                 if(rc == -EAGAIN) /* retry only once on 1st time connection */ {
3397                         rc = CIFSSMBNegotiate(xid, pSesInfo);
3398                         if(rc == -EAGAIN)
3399                                 rc = -EHOSTDOWN;
3400                 }
3401                 if(rc == 0) {
3402                         spin_lock(&GlobalMid_Lock);
3403                         if(pSesInfo->server->tcpStatus != CifsExiting)
3404                                 pSesInfo->server->tcpStatus = CifsGood;
3405                         else
3406                                 rc = -EHOSTDOWN;
3407                         spin_unlock(&GlobalMid_Lock);
3408
3409                 }
3410                 first_time = 1;
3411         }
3412         if (!rc) {
3413                 pSesInfo->capabilities = pSesInfo->server->capabilities;
3414                 if(linuxExtEnabled == 0)
3415                         pSesInfo->capabilities &= (~CAP_UNIX);
3416         /*      pSesInfo->sequence_number = 0;*/
3417                 cFYI(1,("Security Mode: 0x%x Capabilities: 0x%x Time Zone: %d",
3418                         pSesInfo->server->secMode,
3419                         pSesInfo->server->capabilities,
3420                         pSesInfo->server->timeZone));
3421                 if (extended_security
3422                                 && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3423                                 && (pSesInfo->server->secType == NTLMSSP)) {
3424                         cFYI(1, ("New style sesssetup "));
3425                         rc = CIFSSpnegoSessSetup(xid, pSesInfo,
3426                                 NULL /* security blob */,
3427                                 0 /* blob length */,
3428                                 nls_info);
3429                 } else if (extended_security
3430                            && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3431                            && (pSesInfo->server->secType == RawNTLMSSP)) {
3432                         cFYI(1, ("NTLMSSP sesssetup "));
3433                         rc = CIFSNTLMSSPNegotiateSessSetup(xid,
3434                                                 pSesInfo,
3435                                                 &ntlmv2_flag,
3436                                                 nls_info);
3437                         if (!rc) {
3438                                 if(ntlmv2_flag) {
3439                                         char * v2_response;
3440                                         cFYI(1,("Can use more secure NTLM version 2 password hash"));
3441                                         if(CalcNTLMv2_partial_mac_key(pSesInfo,
3442                                                 nls_info)) {
3443                                                 rc = -ENOMEM;
3444                                                 goto ss_err_exit;
3445                                         } else
3446                                                 v2_response = kmalloc(16 + 64 /* blob */, GFP_KERNEL);
3447                                         if(v2_response) {
3448                                                 CalcNTLMv2_response(pSesInfo,v2_response);
3449                                 /*              if(first_time)
3450                                                         cifs_calculate_ntlmv2_mac_key(
3451                                                           pSesInfo->server->mac_signing_key,
3452                                                           response, ntlm_session_key, */
3453                                                 kfree(v2_response);
3454                                         /* BB Put dummy sig in SessSetup PDU? */
3455                                         } else {
3456                                                 rc = -ENOMEM;
3457                                                 goto ss_err_exit;
3458                                         }
3459
3460                                 } else {
3461                                         SMBNTencrypt(pSesInfo->password,
3462                                                 pSesInfo->server->cryptKey,
3463                                                 ntlm_session_key);
3464
3465                                         if(first_time)
3466                                                 cifs_calculate_mac_key(
3467                                                         pSesInfo->server->mac_signing_key,
3468                                                         ntlm_session_key,
3469                                                         pSesInfo->password);
3470                                 }
3471                         /* for better security the weaker lanman hash not sent
3472                            in AuthSessSetup so we no longer calculate it */
3473
3474                                 rc = CIFSNTLMSSPAuthSessSetup(xid,
3475                                         pSesInfo,
3476                                         ntlm_session_key,
3477                                         ntlmv2_flag,
3478                                         nls_info);
3479                         }
3480                 } else { /* old style NTLM 0.12 session setup */
3481                         SMBNTencrypt(pSesInfo->password,
3482                                 pSesInfo->server->cryptKey,
3483                                 ntlm_session_key);
3484
3485                         if(first_time)
3486                                 cifs_calculate_mac_key(
3487                                         pSesInfo->server->mac_signing_key,
3488                                         ntlm_session_key, pSesInfo->password);
3489
3490                         rc = CIFSSessSetup(xid, pSesInfo,
3491                                 ntlm_session_key, nls_info);
3492                 }
3493                 if (rc) {
3494                         cERROR(1,("Send error in SessSetup = %d",rc));
3495                 } else {
3496                         cFYI(1,("CIFS Session Established successfully"));
3497                         pSesInfo->status = CifsGood;
3498                 }
3499         }
3500 ss_err_exit:
3501         return rc;
3502 }
3503