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",
1799                         cifs_sb->mnt_file_mode,cifs_sb->mnt_dir_mode));
1800
1801                 if(volume_info.noperm)
1802                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
1803                 if(volume_info.setuids)
1804                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
1805                 if(volume_info.server_ino)
1806                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
1807                 if(volume_info.remap)
1808                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
1809                 if(volume_info.no_xattr)
1810                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
1811                 if(volume_info.sfu_emul)
1812                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
1813                 if(volume_info.nobrl)
1814                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
1815                 if(volume_info.cifs_acl)
1816                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
1817
1818                 if(volume_info.direct_io) {
1819                         cFYI(1,("mounting share using direct i/o"));
1820                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
1821                 }
1822
1823                 tcon =
1824                     find_unc(sin_server.sin_addr.s_addr, volume_info.UNC,
1825                              volume_info.username);
1826                 if (tcon) {
1827                         cFYI(1, ("Found match on UNC path"));
1828                         /* we can have only one retry value for a connection
1829                            to a share so for resources mounted more than once
1830                            to the same server share the last value passed in
1831                            for the retry flag is used */
1832                         tcon->retry = volume_info.retry;
1833                         tcon->nocase = volume_info.nocase;
1834                 } else {
1835                         tcon = tconInfoAlloc();
1836                         if (tcon == NULL)
1837                                 rc = -ENOMEM;
1838                         else {
1839                                 /* check for null share name ie connect to dfs root */
1840
1841                                 /* BB check if this works for exactly length three strings */
1842                                 if ((strchr(volume_info.UNC + 3, '\\') == NULL)
1843                                     && (strchr(volume_info.UNC + 3, '/') ==
1844                                         NULL)) {
1845                                         rc = connect_to_dfs_path(xid, pSesInfo,
1846                                                         "", cifs_sb->local_nls,
1847                                                         cifs_sb->mnt_cifs_flags &
1848                                                           CIFS_MOUNT_MAP_SPECIAL_CHR);
1849                                         kfree(volume_info.UNC);
1850                                         FreeXid(xid);
1851                                         return -ENODEV;
1852                                 } else {
1853                                         rc = CIFSTCon(xid, pSesInfo,
1854                                                 volume_info.UNC,
1855                                                 tcon, cifs_sb->local_nls);
1856                                         cFYI(1, ("CIFS Tcon rc = %d", rc));
1857                                 }
1858                                 if (!rc) {
1859                                         atomic_inc(&pSesInfo->inUse);
1860                                         tcon->retry = volume_info.retry;
1861                                         tcon->nocase = volume_info.nocase;
1862                                 }
1863                         }
1864                 }
1865         }
1866         if(pSesInfo) {
1867                 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
1868                         sb->s_maxbytes = (u64) 1 << 63;
1869                 } else
1870                         sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
1871         }
1872
1873         sb->s_time_gran = 100;
1874
1875 /* on error free sesinfo and tcon struct if needed */
1876         if (rc) {
1877                 /* if session setup failed, use count is zero but
1878                 we still need to free cifsd thread */
1879                 if(atomic_read(&srvTcp->socketUseCount) == 0) {
1880                         spin_lock(&GlobalMid_Lock);
1881                         srvTcp->tcpStatus = CifsExiting;
1882                         spin_unlock(&GlobalMid_Lock);
1883                         if(srvTcp->tsk) {
1884                                 send_sig(SIGKILL,srvTcp->tsk,1);
1885                                 wait_for_completion(&cifsd_complete);
1886                         }
1887                 }
1888                  /* If find_unc succeeded then rc == 0 so we can not end */
1889                 if (tcon)  /* up accidently freeing someone elses tcon struct */
1890                         tconInfoFree(tcon);
1891                 if (existingCifsSes == NULL) {
1892                         if (pSesInfo) {
1893                                 if ((pSesInfo->server) &&
1894                                     (pSesInfo->status == CifsGood)) {
1895                                         int temp_rc;
1896                                         temp_rc = CIFSSMBLogoff(xid, pSesInfo);
1897                                         /* if the socketUseCount is now zero */
1898                                         if((temp_rc == -ESHUTDOWN) &&
1899                                            (pSesInfo->server->tsk)) {
1900                                                 send_sig(SIGKILL,pSesInfo->server->tsk,1);
1901                                                 wait_for_completion(&cifsd_complete);
1902                                         }
1903                                 } else
1904                                         cFYI(1, ("No session or bad tcon"));
1905                                 sesInfoFree(pSesInfo);
1906                                 /* pSesInfo = NULL; */
1907                         }
1908                 }
1909         } else {
1910                 atomic_inc(&tcon->useCount);
1911                 cifs_sb->tcon = tcon;
1912                 tcon->ses = pSesInfo;
1913
1914                 /* do not care if following two calls succeed - informational only */
1915                 CIFSSMBQFSDeviceInfo(xid, tcon);
1916                 CIFSSMBQFSAttributeInfo(xid, tcon);
1917                 if (tcon->ses->capabilities & CAP_UNIX) {
1918                         if(!CIFSSMBQFSUnixInfo(xid, tcon)) {
1919                                 if(!volume_info.no_psx_acl) {
1920                                         if(CIFS_UNIX_POSIX_ACL_CAP &
1921                                            le64_to_cpu(tcon->fsUnixInfo.Capability))
1922                                                 cFYI(1,("server negotiated posix acl support"));
1923                                                 sb->s_flags |= MS_POSIXACL;
1924                                 }
1925
1926                                 /* Try and negotiate POSIX pathnames if we can. */
1927                                 if (volume_info.posix_paths && (CIFS_UNIX_POSIX_PATHNAMES_CAP &
1928                                     le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1929                                         if (!CIFSSMBSetFSUnixInfo(xid, tcon, CIFS_UNIX_POSIX_PATHNAMES_CAP))  {
1930                                                 cFYI(1,("negotiated posix pathnames support"));
1931                                                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_POSIX_PATHS;
1932                                         } else {
1933                                                 cFYI(1,("posix pathnames support requested but not supported"));
1934                                         }
1935                                 }
1936                         }
1937                 }
1938                 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
1939                         cifs_sb->wsize = min(cifs_sb->wsize,
1940                                              (tcon->ses->server->maxBuf -
1941                                               MAX_CIFS_HDR_SIZE));
1942                 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
1943                         cifs_sb->rsize = min(cifs_sb->rsize,
1944                                              (tcon->ses->server->maxBuf -
1945                                               MAX_CIFS_HDR_SIZE));
1946         }
1947
1948         /* volume_info.password is freed above when existing session found
1949         (in which case it is not needed anymore) but when new sesion is created
1950         the password ptr is put in the new session structure (in which case the
1951         password will be freed at unmount time) */
1952         kfree(volume_info.UNC);
1953         FreeXid(xid);
1954         return rc;
1955 }
1956
1957 static int
1958 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
1959               char session_key[CIFS_SESSION_KEY_SIZE],
1960               const struct nls_table *nls_codepage)
1961 {
1962         struct smb_hdr *smb_buffer;
1963         struct smb_hdr *smb_buffer_response;
1964         SESSION_SETUP_ANDX *pSMB;
1965         SESSION_SETUP_ANDX *pSMBr;
1966         char *bcc_ptr;
1967         char *user;
1968         char *domain;
1969         int rc = 0;
1970         int remaining_words = 0;
1971         int bytes_returned = 0;
1972         int len;
1973         __u32 capabilities;
1974         __u16 count;
1975
1976         cFYI(1, ("In sesssetup"));
1977         if(ses == NULL)
1978                 return -EINVAL;
1979         user = ses->userName;
1980         domain = ses->domainName;
1981         smb_buffer = cifs_buf_get();
1982         if (smb_buffer == NULL) {
1983                 return -ENOMEM;
1984         }
1985         smb_buffer_response = smb_buffer;
1986         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
1987
1988         /* send SMBsessionSetup here */
1989         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
1990                         NULL /* no tCon exists yet */ , 13 /* wct */ );
1991
1992         smb_buffer->Mid = GetNextMid(ses->server);
1993         pSMB->req_no_secext.AndXCommand = 0xFF;
1994         pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
1995         pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
1996
1997         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
1998                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
1999
2000         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2001                 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2002         if (ses->capabilities & CAP_UNICODE) {
2003                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2004                 capabilities |= CAP_UNICODE;
2005         }
2006         if (ses->capabilities & CAP_STATUS32) {
2007                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2008                 capabilities |= CAP_STATUS32;
2009         }
2010         if (ses->capabilities & CAP_DFS) {
2011                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2012                 capabilities |= CAP_DFS;
2013         }
2014         pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2015
2016         pSMB->req_no_secext.CaseInsensitivePasswordLength =
2017                 cpu_to_le16(CIFS_SESSION_KEY_SIZE);
2018
2019         pSMB->req_no_secext.CaseSensitivePasswordLength =
2020             cpu_to_le16(CIFS_SESSION_KEY_SIZE);
2021         bcc_ptr = pByteArea(smb_buffer);
2022         memcpy(bcc_ptr, (char *) session_key, CIFS_SESSION_KEY_SIZE);
2023         bcc_ptr += CIFS_SESSION_KEY_SIZE;
2024         memcpy(bcc_ptr, (char *) session_key, CIFS_SESSION_KEY_SIZE);
2025         bcc_ptr += CIFS_SESSION_KEY_SIZE;
2026
2027         if (ses->capabilities & CAP_UNICODE) {
2028                 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2029                         *bcc_ptr = 0;
2030                         bcc_ptr++;
2031                 }
2032                 if(user == NULL)
2033                         bytes_returned = 0; /* skill null user */
2034                 else
2035                         bytes_returned =
2036                                 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2037                                         nls_codepage);
2038                 /* convert number of 16 bit words to bytes */
2039                 bcc_ptr += 2 * bytes_returned;
2040                 bcc_ptr += 2;   /* trailing null */
2041                 if (domain == NULL)
2042                         bytes_returned =
2043                             cifs_strtoUCS((__le16 *) bcc_ptr,
2044                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2045                 else
2046                         bytes_returned =
2047                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2048                                           nls_codepage);
2049                 bcc_ptr += 2 * bytes_returned;
2050                 bcc_ptr += 2;
2051                 bytes_returned =
2052                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2053                                   32, nls_codepage);
2054                 bcc_ptr += 2 * bytes_returned;
2055                 bytes_returned =
2056                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release,
2057                                   32, nls_codepage);
2058                 bcc_ptr += 2 * bytes_returned;
2059                 bcc_ptr += 2;
2060                 bytes_returned =
2061                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2062                                   64, nls_codepage);
2063                 bcc_ptr += 2 * bytes_returned;
2064                 bcc_ptr += 2;
2065         } else {
2066                 if(user != NULL) {
2067                     strncpy(bcc_ptr, user, 200);
2068                     bcc_ptr += strnlen(user, 200);
2069                 }
2070                 *bcc_ptr = 0;
2071                 bcc_ptr++;
2072                 if (domain == NULL) {
2073                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2074                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2075                 } else {
2076                         strncpy(bcc_ptr, domain, 64);
2077                         bcc_ptr += strnlen(domain, 64);
2078                         *bcc_ptr = 0;
2079                         bcc_ptr++;
2080                 }
2081                 strcpy(bcc_ptr, "Linux version ");
2082                 bcc_ptr += strlen("Linux version ");
2083                 strcpy(bcc_ptr, system_utsname.release);
2084                 bcc_ptr += strlen(system_utsname.release) + 1;
2085                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2086                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2087         }
2088         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2089         smb_buffer->smb_buf_length += count;
2090         pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2091
2092         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2093                          &bytes_returned, 1);
2094         if (rc) {
2095 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2096         } else if ((smb_buffer_response->WordCount == 3)
2097                    || (smb_buffer_response->WordCount == 4)) {
2098                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2099                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2100                 if (action & GUEST_LOGIN)
2101                         cFYI(1, (" Guest login"));      /* do we want to mark SesInfo struct ? */
2102                 ses->Suid = smb_buffer_response->Uid;   /* UID left in wire format (le) */
2103                 cFYI(1, ("UID = %d ", ses->Suid));
2104          /* response can have either 3 or 4 word count - Samba sends 3 */
2105                 bcc_ptr = pByteArea(smb_buffer_response);
2106                 if ((pSMBr->resp.hdr.WordCount == 3)
2107                     || ((pSMBr->resp.hdr.WordCount == 4)
2108                         && (blob_len < pSMBr->resp.ByteCount))) {
2109                         if (pSMBr->resp.hdr.WordCount == 4)
2110                                 bcc_ptr += blob_len;
2111
2112                         if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2113                                 if ((long) (bcc_ptr) % 2) {
2114                                         remaining_words =
2115                                             (BCC(smb_buffer_response) - 1) /2;
2116                                         bcc_ptr++;      /* Unicode strings must be word aligned */
2117                                 } else {
2118                                         remaining_words =
2119                                                 BCC(smb_buffer_response) / 2;
2120                                 }
2121                                 len =
2122                                     UniStrnlen((wchar_t *) bcc_ptr,
2123                                                remaining_words - 1);
2124 /* We look for obvious messed up bcc or strings in response so we do not go off
2125    the end since (at least) WIN2K and Windows XP have a major bug in not null
2126    terminating last Unicode string in response  */
2127                                 ses->serverOS = kzalloc(2 * (len + 1), GFP_KERNEL);
2128                                 if(ses->serverOS == NULL)
2129                                         goto sesssetup_nomem;
2130                                 cifs_strfromUCS_le(ses->serverOS,
2131                                            (__le16 *)bcc_ptr, len,nls_codepage);
2132                                 bcc_ptr += 2 * (len + 1);
2133                                 remaining_words -= len + 1;
2134                                 ses->serverOS[2 * len] = 0;
2135                                 ses->serverOS[1 + (2 * len)] = 0;
2136                                 if (remaining_words > 0) {
2137                                         len = UniStrnlen((wchar_t *)bcc_ptr,
2138                                                          remaining_words-1);
2139                                         ses->serverNOS = kzalloc(2 * (len + 1),GFP_KERNEL);
2140                                         if(ses->serverNOS == NULL)
2141                                                 goto sesssetup_nomem;
2142                                         cifs_strfromUCS_le(ses->serverNOS,
2143                                                            (__le16 *)bcc_ptr,len,nls_codepage);
2144                                         bcc_ptr += 2 * (len + 1);
2145                                         ses->serverNOS[2 * len] = 0;
2146                                         ses->serverNOS[1 + (2 * len)] = 0;
2147                                         if(strncmp(ses->serverNOS,
2148                                                 "NT LAN Manager 4",16) == 0) {
2149                                                 cFYI(1,("NT4 server"));
2150                                                 ses->flags |= CIFS_SES_NT4;
2151                                         }
2152                                         remaining_words -= len + 1;
2153                                         if (remaining_words > 0) {
2154                                                 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2155           /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2156                                                 ses->serverDomain =
2157                                                     kzalloc(2*(len+1),GFP_KERNEL);
2158                                                 if(ses->serverDomain == NULL)
2159                                                         goto sesssetup_nomem;
2160                                                 cifs_strfromUCS_le(ses->serverDomain,
2161                                                      (__le16 *)bcc_ptr,len,nls_codepage);
2162                                                 bcc_ptr += 2 * (len + 1);
2163                                                 ses->serverDomain[2*len] = 0;
2164                                                 ses->serverDomain[1+(2*len)] = 0;
2165                                         } /* else no more room so create dummy domain string */
2166                                         else
2167                                                 ses->serverDomain =
2168                                                         kzalloc(2, GFP_KERNEL);
2169                                 } else {        /* no room so create dummy domain and NOS string */
2170                                         /* if these kcallocs fail not much we
2171                                            can do, but better to not fail the
2172                                            sesssetup itself */
2173                                         ses->serverDomain =
2174                                             kzalloc(2, GFP_KERNEL);
2175                                         ses->serverNOS =
2176                                             kzalloc(2, GFP_KERNEL);
2177                                 }
2178                         } else {        /* ASCII */
2179                                 len = strnlen(bcc_ptr, 1024);
2180                                 if (((long) bcc_ptr + len) - (long)
2181                                     pByteArea(smb_buffer_response)
2182                                             <= BCC(smb_buffer_response)) {
2183                                         ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
2184                                         if(ses->serverOS == NULL)
2185                                                 goto sesssetup_nomem;
2186                                         strncpy(ses->serverOS,bcc_ptr, len);
2187
2188                                         bcc_ptr += len;
2189                                         bcc_ptr[0] = 0; /* null terminate the string */
2190                                         bcc_ptr++;
2191
2192                                         len = strnlen(bcc_ptr, 1024);
2193                                         ses->serverNOS = kzalloc(len + 1,GFP_KERNEL);
2194                                         if(ses->serverNOS == NULL)
2195                                                 goto sesssetup_nomem;
2196                                         strncpy(ses->serverNOS, bcc_ptr, len);
2197                                         bcc_ptr += len;
2198                                         bcc_ptr[0] = 0;
2199                                         bcc_ptr++;
2200
2201                                         len = strnlen(bcc_ptr, 1024);
2202                                         ses->serverDomain = kzalloc(len + 1,GFP_KERNEL);
2203                                         if(ses->serverDomain == NULL)
2204                                                 goto sesssetup_nomem;
2205                                         strncpy(ses->serverDomain, bcc_ptr, len);
2206                                         bcc_ptr += len;
2207                                         bcc_ptr[0] = 0;
2208                                         bcc_ptr++;
2209                                 } else
2210                                         cFYI(1,
2211                                              ("Variable field of length %d extends beyond end of smb ",
2212                                               len));
2213                         }
2214                 } else {
2215                         cERROR(1,
2216                                (" Security Blob Length extends beyond end of SMB"));
2217                 }
2218         } else {
2219                 cERROR(1,
2220                        (" Invalid Word count %d: ",
2221                         smb_buffer_response->WordCount));
2222                 rc = -EIO;
2223         }
2224 sesssetup_nomem:        /* do not return an error on nomem for the info strings,
2225                            since that could make reconnection harder, and
2226                            reconnection might be needed to free memory */
2227         if (smb_buffer)
2228                 cifs_buf_release(smb_buffer);
2229
2230         return rc;
2231 }
2232
2233 static int
2234 CIFSSpnegoSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2235                 char *SecurityBlob,int SecurityBlobLength,
2236                 const struct nls_table *nls_codepage)
2237 {
2238         struct smb_hdr *smb_buffer;
2239         struct smb_hdr *smb_buffer_response;
2240         SESSION_SETUP_ANDX *pSMB;
2241         SESSION_SETUP_ANDX *pSMBr;
2242         char *bcc_ptr;
2243         char *user;
2244         char *domain;
2245         int rc = 0;
2246         int remaining_words = 0;
2247         int bytes_returned = 0;
2248         int len;
2249         __u32 capabilities;
2250         __u16 count;
2251
2252         cFYI(1, ("In spnego sesssetup "));
2253         if(ses == NULL)
2254                 return -EINVAL;
2255         user = ses->userName;
2256         domain = ses->domainName;
2257
2258         smb_buffer = cifs_buf_get();
2259         if (smb_buffer == NULL) {
2260                 return -ENOMEM;
2261         }
2262         smb_buffer_response = smb_buffer;
2263         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2264
2265         /* send SMBsessionSetup here */
2266         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2267                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2268
2269         smb_buffer->Mid = GetNextMid(ses->server);
2270         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2271         pSMB->req.AndXCommand = 0xFF;
2272         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2273         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2274
2275         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2276                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2277
2278         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2279             CAP_EXTENDED_SECURITY;
2280         if (ses->capabilities & CAP_UNICODE) {
2281                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2282                 capabilities |= CAP_UNICODE;
2283         }
2284         if (ses->capabilities & CAP_STATUS32) {
2285                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2286                 capabilities |= CAP_STATUS32;
2287         }
2288         if (ses->capabilities & CAP_DFS) {
2289                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2290                 capabilities |= CAP_DFS;
2291         }
2292         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2293
2294         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2295         bcc_ptr = pByteArea(smb_buffer);
2296         memcpy(bcc_ptr, SecurityBlob, SecurityBlobLength);
2297         bcc_ptr += SecurityBlobLength;
2298
2299         if (ses->capabilities & CAP_UNICODE) {
2300                 if ((long) bcc_ptr % 2) {       /* must be word aligned for Unicode strings */
2301                         *bcc_ptr = 0;
2302                         bcc_ptr++;
2303                 }
2304                 bytes_returned =
2305                     cifs_strtoUCS((__le16 *) bcc_ptr, user, 100, nls_codepage);
2306                 bcc_ptr += 2 * bytes_returned;  /* convert num of 16 bit words to bytes */
2307                 bcc_ptr += 2;   /* trailing null */
2308                 if (domain == NULL)
2309                         bytes_returned =
2310                             cifs_strtoUCS((__le16 *) bcc_ptr,
2311                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2312                 else
2313                         bytes_returned =
2314                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2315                                           nls_codepage);
2316                 bcc_ptr += 2 * bytes_returned;
2317                 bcc_ptr += 2;
2318                 bytes_returned =
2319                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2320                                   32, nls_codepage);
2321                 bcc_ptr += 2 * bytes_returned;
2322                 bytes_returned =
2323                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release, 32,
2324                                   nls_codepage);
2325                 bcc_ptr += 2 * bytes_returned;
2326                 bcc_ptr += 2;
2327                 bytes_returned =
2328                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2329                                   64, nls_codepage);
2330                 bcc_ptr += 2 * bytes_returned;
2331                 bcc_ptr += 2;
2332         } else {
2333                 strncpy(bcc_ptr, user, 200);
2334                 bcc_ptr += strnlen(user, 200);
2335                 *bcc_ptr = 0;
2336                 bcc_ptr++;
2337                 if (domain == NULL) {
2338                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2339                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2340                 } else {
2341                         strncpy(bcc_ptr, domain, 64);
2342                         bcc_ptr += strnlen(domain, 64);
2343                         *bcc_ptr = 0;
2344                         bcc_ptr++;
2345                 }
2346                 strcpy(bcc_ptr, "Linux version ");
2347                 bcc_ptr += strlen("Linux version ");
2348                 strcpy(bcc_ptr, system_utsname.release);
2349                 bcc_ptr += strlen(system_utsname.release) + 1;
2350                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2351                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2352         }
2353         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2354         smb_buffer->smb_buf_length += count;
2355         pSMB->req.ByteCount = cpu_to_le16(count);
2356
2357         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2358                          &bytes_returned, 1);
2359         if (rc) {
2360 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2361         } else if ((smb_buffer_response->WordCount == 3)
2362                    || (smb_buffer_response->WordCount == 4)) {
2363                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2364                 __u16 blob_len =
2365                     le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2366                 if (action & GUEST_LOGIN)
2367                         cFYI(1, (" Guest login"));      /* BB do we want to set anything in SesInfo struct ? */
2368                 if (ses) {
2369                         ses->Suid = smb_buffer_response->Uid;   /* UID left in wire format (le) */
2370                         cFYI(1, ("UID = %d ", ses->Suid));
2371                         bcc_ptr = pByteArea(smb_buffer_response);       /* response can have either 3 or 4 word count - Samba sends 3 */
2372
2373                         /* BB Fix below to make endian neutral !! */
2374
2375                         if ((pSMBr->resp.hdr.WordCount == 3)
2376                             || ((pSMBr->resp.hdr.WordCount == 4)
2377                                 && (blob_len <
2378                                     pSMBr->resp.ByteCount))) {
2379                                 if (pSMBr->resp.hdr.WordCount == 4) {
2380                                         bcc_ptr +=
2381                                             blob_len;
2382                                         cFYI(1,
2383                                              ("Security Blob Length %d ",
2384                                               blob_len));
2385                                 }
2386
2387                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2388                                         if ((long) (bcc_ptr) % 2) {
2389                                                 remaining_words =
2390                                                     (BCC(smb_buffer_response)
2391                                                      - 1) / 2;
2392                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
2393                                         } else {
2394                                                 remaining_words =
2395                                                     BCC
2396                                                     (smb_buffer_response) / 2;
2397                                         }
2398                                         len =
2399                                             UniStrnlen((wchar_t *) bcc_ptr,
2400                                                        remaining_words - 1);
2401 /* We look for obvious messed up bcc or strings in response so we do not go off
2402    the end since (at least) WIN2K and Windows XP have a major bug in not null
2403    terminating last Unicode string in response  */
2404                                         ses->serverOS =
2405                                             kzalloc(2 * (len + 1), GFP_KERNEL);
2406                                         cifs_strfromUCS_le(ses->serverOS,
2407                                                            (__le16 *)
2408                                                            bcc_ptr, len,
2409                                                            nls_codepage);
2410                                         bcc_ptr += 2 * (len + 1);
2411                                         remaining_words -= len + 1;
2412                                         ses->serverOS[2 * len] = 0;
2413                                         ses->serverOS[1 + (2 * len)] = 0;
2414                                         if (remaining_words > 0) {
2415                                                 len = UniStrnlen((wchar_t *)bcc_ptr,
2416                                                                  remaining_words
2417                                                                  - 1);
2418                                                 ses->serverNOS =
2419                                                     kzalloc(2 * (len + 1),
2420                                                             GFP_KERNEL);
2421                                                 cifs_strfromUCS_le(ses->serverNOS,
2422                                                                    (__le16 *)bcc_ptr,
2423                                                                    len,
2424                                                                    nls_codepage);
2425                                                 bcc_ptr += 2 * (len + 1);
2426                                                 ses->serverNOS[2 * len] = 0;
2427                                                 ses->serverNOS[1 + (2 * len)] = 0;
2428                                                 remaining_words -= len + 1;
2429                                                 if (remaining_words > 0) {
2430                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2431                             /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2432                                                         ses->serverDomain = kzalloc(2*(len+1),GFP_KERNEL);
2433                                                         cifs_strfromUCS_le(ses->serverDomain,
2434                                                              (__le16 *)bcc_ptr,
2435                                                              len, nls_codepage);
2436                                                         bcc_ptr += 2*(len+1);
2437                                                         ses->serverDomain[2*len] = 0;
2438                                                         ses->serverDomain[1+(2*len)] = 0;
2439                                                 } /* else no more room so create dummy domain string */
2440                                                 else
2441                                                         ses->serverDomain =
2442                                                             kzalloc(2,GFP_KERNEL);
2443                                         } else {        /* no room so create dummy domain and NOS string */
2444                                                 ses->serverDomain = kzalloc(2, GFP_KERNEL);
2445                                                 ses->serverNOS = kzalloc(2, GFP_KERNEL);
2446                                         }
2447                                 } else {        /* ASCII */
2448
2449                                         len = strnlen(bcc_ptr, 1024);
2450                                         if (((long) bcc_ptr + len) - (long)
2451                                             pByteArea(smb_buffer_response)
2452                                             <= BCC(smb_buffer_response)) {
2453                                                 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
2454                                                 strncpy(ses->serverOS, bcc_ptr, len);
2455
2456                                                 bcc_ptr += len;
2457                                                 bcc_ptr[0] = 0; /* null terminate the string */
2458                                                 bcc_ptr++;
2459
2460                                                 len = strnlen(bcc_ptr, 1024);
2461                                                 ses->serverNOS = kzalloc(len + 1,GFP_KERNEL);
2462                                                 strncpy(ses->serverNOS, bcc_ptr, len);
2463                                                 bcc_ptr += len;
2464                                                 bcc_ptr[0] = 0;
2465                                                 bcc_ptr++;
2466
2467                                                 len = strnlen(bcc_ptr, 1024);
2468                                                 ses->serverDomain = kzalloc(len + 1, GFP_KERNEL);
2469                                                 strncpy(ses->serverDomain, bcc_ptr, len);
2470                                                 bcc_ptr += len;
2471                                                 bcc_ptr[0] = 0;
2472                                                 bcc_ptr++;
2473                                         } else
2474                                                 cFYI(1,
2475                                                      ("Variable field of length %d extends beyond end of smb ",
2476                                                       len));
2477                                 }
2478                         } else {
2479                                 cERROR(1,
2480                                        (" Security Blob Length extends beyond end of SMB"));
2481                         }
2482                 } else {
2483                         cERROR(1, ("No session structure passed in."));
2484                 }
2485         } else {
2486                 cERROR(1,
2487                        (" Invalid Word count %d: ",
2488                         smb_buffer_response->WordCount));
2489                 rc = -EIO;
2490         }
2491
2492         if (smb_buffer)
2493                 cifs_buf_release(smb_buffer);
2494
2495         return rc;
2496 }
2497
2498 static int
2499 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2500                               struct cifsSesInfo *ses, int * pNTLMv2_flag,
2501                               const struct nls_table *nls_codepage)
2502 {
2503         struct smb_hdr *smb_buffer;
2504         struct smb_hdr *smb_buffer_response;
2505         SESSION_SETUP_ANDX *pSMB;
2506         SESSION_SETUP_ANDX *pSMBr;
2507         char *bcc_ptr;
2508         char *domain;
2509         int rc = 0;
2510         int remaining_words = 0;
2511         int bytes_returned = 0;
2512         int len;
2513         int SecurityBlobLength = sizeof (NEGOTIATE_MESSAGE);
2514         PNEGOTIATE_MESSAGE SecurityBlob;
2515         PCHALLENGE_MESSAGE SecurityBlob2;
2516         __u32 negotiate_flags, capabilities;
2517         __u16 count;
2518
2519         cFYI(1, ("In NTLMSSP sesssetup (negotiate) "));
2520         if(ses == NULL)
2521                 return -EINVAL;
2522         domain = ses->domainName;
2523         *pNTLMv2_flag = FALSE;
2524         smb_buffer = cifs_buf_get();
2525         if (smb_buffer == NULL) {
2526                 return -ENOMEM;
2527         }
2528         smb_buffer_response = smb_buffer;
2529         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2530         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2531
2532         /* send SMBsessionSetup here */
2533         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2534                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2535
2536         smb_buffer->Mid = GetNextMid(ses->server);
2537         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2538         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2539
2540         pSMB->req.AndXCommand = 0xFF;
2541         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2542         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2543
2544         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2545                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2546
2547         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2548             CAP_EXTENDED_SECURITY;
2549         if (ses->capabilities & CAP_UNICODE) {
2550                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2551                 capabilities |= CAP_UNICODE;
2552         }
2553         if (ses->capabilities & CAP_STATUS32) {
2554                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2555                 capabilities |= CAP_STATUS32;
2556         }
2557         if (ses->capabilities & CAP_DFS) {
2558                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2559                 capabilities |= CAP_DFS;
2560         }
2561         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2562
2563         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2564         SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2565         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2566         SecurityBlob->MessageType = NtLmNegotiate;
2567         negotiate_flags =
2568             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2569             NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM | 0x80000000 |
2570             /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2571         if(sign_CIFS_PDUs)
2572                 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2573         if(ntlmv2_support)
2574                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
2575         /* setup pointers to domain name and workstation name */
2576         bcc_ptr += SecurityBlobLength;
2577
2578         SecurityBlob->WorkstationName.Buffer = 0;
2579         SecurityBlob->WorkstationName.Length = 0;
2580         SecurityBlob->WorkstationName.MaximumLength = 0;
2581
2582         if (domain == NULL) {
2583                 SecurityBlob->DomainName.Buffer = 0;
2584                 SecurityBlob->DomainName.Length = 0;
2585                 SecurityBlob->DomainName.MaximumLength = 0;
2586         } else {
2587                 __u16 len;
2588                 negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
2589                 strncpy(bcc_ptr, domain, 63);
2590                 len = strnlen(domain, 64);
2591                 SecurityBlob->DomainName.MaximumLength =
2592                     cpu_to_le16(len);
2593                 SecurityBlob->DomainName.Buffer =
2594                     cpu_to_le32((long) &SecurityBlob->
2595                                 DomainString -
2596                                 (long) &SecurityBlob->Signature);
2597                 bcc_ptr += len;
2598                 SecurityBlobLength += len;
2599                 SecurityBlob->DomainName.Length =
2600                     cpu_to_le16(len);
2601         }
2602         if (ses->capabilities & CAP_UNICODE) {
2603                 if ((long) bcc_ptr % 2) {
2604                         *bcc_ptr = 0;
2605                         bcc_ptr++;
2606                 }
2607
2608                 bytes_returned =
2609                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2610                                   32, nls_codepage);
2611                 bcc_ptr += 2 * bytes_returned;
2612                 bytes_returned =
2613                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release, 32,
2614                                   nls_codepage);
2615                 bcc_ptr += 2 * bytes_returned;
2616                 bcc_ptr += 2;   /* null terminate Linux version */
2617                 bytes_returned =
2618                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2619                                   64, nls_codepage);
2620                 bcc_ptr += 2 * bytes_returned;
2621                 *(bcc_ptr + 1) = 0;
2622                 *(bcc_ptr + 2) = 0;
2623                 bcc_ptr += 2;   /* null terminate network opsys string */
2624                 *(bcc_ptr + 1) = 0;
2625                 *(bcc_ptr + 2) = 0;
2626                 bcc_ptr += 2;   /* null domain */
2627         } else {                /* ASCII */
2628                 strcpy(bcc_ptr, "Linux version ");
2629                 bcc_ptr += strlen("Linux version ");
2630                 strcpy(bcc_ptr, system_utsname.release);
2631                 bcc_ptr += strlen(system_utsname.release) + 1;
2632                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2633                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2634                 bcc_ptr++;      /* empty domain field */
2635                 *bcc_ptr = 0;
2636         }
2637         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2638         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2639         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2640         smb_buffer->smb_buf_length += count;
2641         pSMB->req.ByteCount = cpu_to_le16(count);
2642
2643         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2644                          &bytes_returned, 1);
2645
2646         if (smb_buffer_response->Status.CifsError ==
2647             cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
2648                 rc = 0;
2649
2650         if (rc) {
2651 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2652         } else if ((smb_buffer_response->WordCount == 3)
2653                    || (smb_buffer_response->WordCount == 4)) {
2654                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2655                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2656
2657                 if (action & GUEST_LOGIN)
2658                         cFYI(1, (" Guest login"));
2659         /* Do we want to set anything in SesInfo struct when guest login? */
2660
2661                 bcc_ptr = pByteArea(smb_buffer_response);
2662         /* response can have either 3 or 4 word count - Samba sends 3 */
2663
2664                 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
2665                 if (SecurityBlob2->MessageType != NtLmChallenge) {
2666                         cFYI(1,
2667                              ("Unexpected NTLMSSP message type received %d",
2668                               SecurityBlob2->MessageType));
2669                 } else if (ses) {
2670                         ses->Suid = smb_buffer_response->Uid; /* UID left in le format */
2671                         cFYI(1, ("UID = %d ", ses->Suid));
2672                         if ((pSMBr->resp.hdr.WordCount == 3)
2673                             || ((pSMBr->resp.hdr.WordCount == 4)
2674                                 && (blob_len <
2675                                     pSMBr->resp.ByteCount))) {
2676
2677                                 if (pSMBr->resp.hdr.WordCount == 4) {
2678                                         bcc_ptr += blob_len;
2679                                         cFYI(1,
2680                                              ("Security Blob Length %d ",
2681                                               blob_len));
2682                                 }
2683
2684                                 cFYI(1, ("NTLMSSP Challenge rcvd "));
2685
2686                                 memcpy(ses->server->cryptKey,
2687                                        SecurityBlob2->Challenge,
2688                                        CIFS_CRYPTO_KEY_SIZE);
2689                                 if(SecurityBlob2->NegotiateFlags & cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
2690                                         *pNTLMv2_flag = TRUE;
2691
2692                                 if((SecurityBlob2->NegotiateFlags &
2693                                         cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN))
2694                                         || (sign_CIFS_PDUs > 1))
2695                                                 ses->server->secMode |=
2696                                                         SECMODE_SIGN_REQUIRED;
2697                                 if ((SecurityBlob2->NegotiateFlags &
2698                                         cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
2699                                                 ses->server->secMode |=
2700                                                         SECMODE_SIGN_ENABLED;
2701
2702                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2703                                         if ((long) (bcc_ptr) % 2) {
2704                                                 remaining_words =
2705                                                     (BCC(smb_buffer_response)
2706                                                      - 1) / 2;
2707                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
2708                                         } else {
2709                                                 remaining_words =
2710                                                     BCC
2711                                                     (smb_buffer_response) / 2;
2712                                         }
2713                                         len =
2714                                             UniStrnlen((wchar_t *) bcc_ptr,
2715                                                        remaining_words - 1);
2716 /* We look for obvious messed up bcc or strings in response so we do not go off
2717    the end since (at least) WIN2K and Windows XP have a major bug in not null
2718    terminating last Unicode string in response  */
2719                                         ses->serverOS =
2720                                             kzalloc(2 * (len + 1), GFP_KERNEL);
2721                                         cifs_strfromUCS_le(ses->serverOS,
2722                                                            (__le16 *)
2723                                                            bcc_ptr, len,
2724                                                            nls_codepage);
2725                                         bcc_ptr += 2 * (len + 1);
2726                                         remaining_words -= len + 1;
2727                                         ses->serverOS[2 * len] = 0;
2728                                         ses->serverOS[1 + (2 * len)] = 0;
2729                                         if (remaining_words > 0) {
2730                                                 len = UniStrnlen((wchar_t *)
2731                                                                  bcc_ptr,
2732                                                                  remaining_words
2733                                                                  - 1);
2734                                                 ses->serverNOS =
2735                                                     kzalloc(2 * (len + 1),
2736                                                             GFP_KERNEL);
2737                                                 cifs_strfromUCS_le(ses->
2738                                                                    serverNOS,
2739                                                                    (__le16 *)
2740                                                                    bcc_ptr,
2741                                                                    len,
2742                                                                    nls_codepage);
2743                                                 bcc_ptr += 2 * (len + 1);
2744                                                 ses->serverNOS[2 * len] = 0;
2745                                                 ses->serverNOS[1 +
2746                                                                (2 * len)] = 0;
2747                                                 remaining_words -= len + 1;
2748                                                 if (remaining_words > 0) {
2749                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2750            /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2751                                                         ses->serverDomain =
2752                                                             kzalloc(2 *
2753                                                                     (len +
2754                                                                      1),
2755                                                                     GFP_KERNEL);
2756                                                         cifs_strfromUCS_le
2757                                                             (ses->serverDomain,
2758                                                              (__le16 *)bcc_ptr,
2759                                                              len, nls_codepage);
2760                                                         bcc_ptr +=
2761                                                             2 * (len + 1);
2762                                                         ses->serverDomain[2*len]
2763                                                             = 0;
2764                                                         ses->serverDomain
2765                                                                 [1 + (2 * len)]
2766                                                             = 0;
2767                                                 } /* else no more room so create dummy domain string */
2768                                                 else
2769                                                         ses->serverDomain =
2770                                                             kzalloc(2,
2771                                                                     GFP_KERNEL);
2772                                         } else {        /* no room so create dummy domain and NOS string */
2773                                                 ses->serverDomain =
2774                                                     kzalloc(2, GFP_KERNEL);
2775                                                 ses->serverNOS =
2776                                                     kzalloc(2, GFP_KERNEL);
2777                                         }
2778                                 } else {        /* ASCII */
2779                                         len = strnlen(bcc_ptr, 1024);
2780                                         if (((long) bcc_ptr + len) - (long)
2781                                             pByteArea(smb_buffer_response)
2782                                             <= BCC(smb_buffer_response)) {
2783                                                 ses->serverOS =
2784                                                     kzalloc(len + 1,
2785                                                             GFP_KERNEL);
2786                                                 strncpy(ses->serverOS,
2787                                                         bcc_ptr, len);
2788
2789                                                 bcc_ptr += len;
2790                                                 bcc_ptr[0] = 0; /* null terminate string */
2791                                                 bcc_ptr++;
2792
2793                                                 len = strnlen(bcc_ptr, 1024);
2794                                                 ses->serverNOS =
2795                                                     kzalloc(len + 1,
2796                                                             GFP_KERNEL);
2797                                                 strncpy(ses->serverNOS, bcc_ptr, len);
2798                                                 bcc_ptr += len;
2799                                                 bcc_ptr[0] = 0;
2800                                                 bcc_ptr++;
2801
2802                                                 len = strnlen(bcc_ptr, 1024);
2803                                                 ses->serverDomain =
2804                                                     kzalloc(len + 1,
2805                                                             GFP_KERNEL);
2806                                                 strncpy(ses->serverDomain, bcc_ptr, len);
2807                                                 bcc_ptr += len;
2808                                                 bcc_ptr[0] = 0;
2809                                                 bcc_ptr++;
2810                                         } else
2811                                                 cFYI(1,
2812                                                      ("Variable field of length %d extends beyond end of smb ",
2813                                                       len));
2814                                 }
2815                         } else {
2816                                 cERROR(1,
2817                                        (" Security Blob Length extends beyond end of SMB"));
2818                         }
2819                 } else {
2820                         cERROR(1, ("No session structure passed in."));
2821                 }
2822         } else {
2823                 cERROR(1,
2824                        (" Invalid Word count %d: ",
2825                         smb_buffer_response->WordCount));
2826                 rc = -EIO;
2827         }
2828
2829         if (smb_buffer)
2830                 cifs_buf_release(smb_buffer);
2831
2832         return rc;
2833 }
2834 static int
2835 CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2836                 char *ntlm_session_key, int ntlmv2_flag,
2837                 const struct nls_table *nls_codepage)
2838 {
2839         struct smb_hdr *smb_buffer;
2840         struct smb_hdr *smb_buffer_response;
2841         SESSION_SETUP_ANDX *pSMB;
2842         SESSION_SETUP_ANDX *pSMBr;
2843         char *bcc_ptr;
2844         char *user;
2845         char *domain;
2846         int rc = 0;
2847         int remaining_words = 0;
2848         int bytes_returned = 0;
2849         int len;
2850         int SecurityBlobLength = sizeof (AUTHENTICATE_MESSAGE);
2851         PAUTHENTICATE_MESSAGE SecurityBlob;
2852         __u32 negotiate_flags, capabilities;
2853         __u16 count;
2854
2855         cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
2856         if(ses == NULL)
2857                 return -EINVAL;
2858         user = ses->userName;
2859         domain = ses->domainName;
2860         smb_buffer = cifs_buf_get();
2861         if (smb_buffer == NULL) {
2862                 return -ENOMEM;
2863         }
2864         smb_buffer_response = smb_buffer;
2865         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2866         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2867
2868         /* send SMBsessionSetup here */
2869         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2870                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2871
2872         smb_buffer->Mid = GetNextMid(ses->server);
2873         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2874         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2875         pSMB->req.AndXCommand = 0xFF;
2876         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2877         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2878
2879         pSMB->req.hdr.Uid = ses->Suid;
2880
2881         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2882                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2883
2884         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2885             CAP_EXTENDED_SECURITY;
2886         if (ses->capabilities & CAP_UNICODE) {
2887                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2888                 capabilities |= CAP_UNICODE;
2889         }
2890         if (ses->capabilities & CAP_STATUS32) {
2891                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2892                 capabilities |= CAP_STATUS32;
2893         }
2894         if (ses->capabilities & CAP_DFS) {
2895                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2896                 capabilities |= CAP_DFS;
2897         }
2898         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2899
2900         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2901         SecurityBlob = (PAUTHENTICATE_MESSAGE) bcc_ptr;
2902         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2903         SecurityBlob->MessageType = NtLmAuthenticate;
2904         bcc_ptr += SecurityBlobLength;
2905         negotiate_flags =
2906             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
2907             NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
2908             0x80000000 | NTLMSSP_NEGOTIATE_128;
2909         if(sign_CIFS_PDUs)
2910                 negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
2911         if(ntlmv2_flag)
2912                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
2913
2914 /* setup pointers to domain name and workstation name */
2915
2916         SecurityBlob->WorkstationName.Buffer = 0;
2917         SecurityBlob->WorkstationName.Length = 0;
2918         SecurityBlob->WorkstationName.MaximumLength = 0;
2919         SecurityBlob->SessionKey.Length = 0;
2920         SecurityBlob->SessionKey.MaximumLength = 0;
2921         SecurityBlob->SessionKey.Buffer = 0;
2922
2923         SecurityBlob->LmChallengeResponse.Length = 0;
2924         SecurityBlob->LmChallengeResponse.MaximumLength = 0;
2925         SecurityBlob->LmChallengeResponse.Buffer = 0;
2926
2927         SecurityBlob->NtChallengeResponse.Length =
2928             cpu_to_le16(CIFS_SESSION_KEY_SIZE);
2929         SecurityBlob->NtChallengeResponse.MaximumLength =
2930             cpu_to_le16(CIFS_SESSION_KEY_SIZE);
2931         memcpy(bcc_ptr, ntlm_session_key, CIFS_SESSION_KEY_SIZE);
2932         SecurityBlob->NtChallengeResponse.Buffer =
2933             cpu_to_le32(SecurityBlobLength);
2934         SecurityBlobLength += CIFS_SESSION_KEY_SIZE;
2935         bcc_ptr += CIFS_SESSION_KEY_SIZE;
2936
2937         if (ses->capabilities & CAP_UNICODE) {
2938                 if (domain == NULL) {
2939                         SecurityBlob->DomainName.Buffer = 0;
2940                         SecurityBlob->DomainName.Length = 0;
2941                         SecurityBlob->DomainName.MaximumLength = 0;
2942                 } else {
2943                         __u16 len =
2944                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2945                                           nls_codepage);
2946                         len *= 2;
2947                         SecurityBlob->DomainName.MaximumLength =
2948                             cpu_to_le16(len);
2949                         SecurityBlob->DomainName.Buffer =
2950                             cpu_to_le32(SecurityBlobLength);
2951                         bcc_ptr += len;
2952                         SecurityBlobLength += len;
2953                         SecurityBlob->DomainName.Length =
2954                             cpu_to_le16(len);
2955                 }
2956                 if (user == NULL) {
2957                         SecurityBlob->UserName.Buffer = 0;
2958                         SecurityBlob->UserName.Length = 0;
2959                         SecurityBlob->UserName.MaximumLength = 0;
2960                 } else {
2961                         __u16 len =
2962                             cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
2963                                           nls_codepage);
2964                         len *= 2;
2965                         SecurityBlob->UserName.MaximumLength =
2966                             cpu_to_le16(len);
2967                         SecurityBlob->UserName.Buffer =
2968                             cpu_to_le32(SecurityBlobLength);
2969                         bcc_ptr += len;
2970                         SecurityBlobLength += len;
2971                         SecurityBlob->UserName.Length =
2972                             cpu_to_le16(len);
2973                 }
2974
2975                 /* SecurityBlob->WorkstationName.Length = cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
2976                    SecurityBlob->WorkstationName.Length *= 2;
2977                    SecurityBlob->WorkstationName.MaximumLength = cpu_to_le16(SecurityBlob->WorkstationName.Length);
2978                    SecurityBlob->WorkstationName.Buffer = cpu_to_le32(SecurityBlobLength);
2979                    bcc_ptr += SecurityBlob->WorkstationName.Length;
2980                    SecurityBlobLength += SecurityBlob->WorkstationName.Length;
2981                    SecurityBlob->WorkstationName.Length = cpu_to_le16(SecurityBlob->WorkstationName.Length);  */
2982
2983                 if ((long) bcc_ptr % 2) {
2984                         *bcc_ptr = 0;
2985                         bcc_ptr++;
2986                 }
2987                 bytes_returned =
2988                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2989                                   32, nls_codepage);
2990                 bcc_ptr += 2 * bytes_returned;
2991                 bytes_returned =
2992                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release, 32,
2993                                   nls_codepage);
2994                 bcc_ptr += 2 * bytes_returned;
2995                 bcc_ptr += 2;   /* null term version string */
2996                 bytes_returned =
2997                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2998                                   64, nls_codepage);
2999                 bcc_ptr += 2 * bytes_returned;
3000                 *(bcc_ptr + 1) = 0;
3001                 *(bcc_ptr + 2) = 0;
3002                 bcc_ptr += 2;   /* null terminate network opsys string */
3003                 *(bcc_ptr + 1) = 0;
3004                 *(bcc_ptr + 2) = 0;
3005                 bcc_ptr += 2;   /* null domain */
3006         } else {                /* ASCII */
3007                 if (domain == NULL) {
3008                         SecurityBlob->DomainName.Buffer = 0;
3009                         SecurityBlob->DomainName.Length = 0;
3010                         SecurityBlob->DomainName.MaximumLength = 0;
3011                 } else {
3012                         __u16 len;
3013                         negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
3014                         strncpy(bcc_ptr, domain, 63);
3015                         len = strnlen(domain, 64);
3016                         SecurityBlob->DomainName.MaximumLength =
3017                             cpu_to_le16(len);
3018                         SecurityBlob->DomainName.Buffer =
3019                             cpu_to_le32(SecurityBlobLength);
3020                         bcc_ptr += len;
3021                         SecurityBlobLength += len;
3022                         SecurityBlob->DomainName.Length = cpu_to_le16(len);
3023                 }
3024                 if (user == NULL) {
3025                         SecurityBlob->UserName.Buffer = 0;
3026                         SecurityBlob->UserName.Length = 0;
3027                         SecurityBlob->UserName.MaximumLength = 0;
3028                 } else {
3029                         __u16 len;
3030                         strncpy(bcc_ptr, user, 63);
3031                         len = strnlen(user, 64);
3032                         SecurityBlob->UserName.MaximumLength =
3033                             cpu_to_le16(len);
3034                         SecurityBlob->UserName.Buffer =
3035                             cpu_to_le32(SecurityBlobLength);
3036                         bcc_ptr += len;
3037                         SecurityBlobLength += len;
3038                         SecurityBlob->UserName.Length = cpu_to_le16(len);
3039                 }
3040                 /* BB fill in our workstation name if known BB */
3041
3042                 strcpy(bcc_ptr, "Linux version ");
3043                 bcc_ptr += strlen("Linux version ");
3044                 strcpy(bcc_ptr, system_utsname.release);
3045                 bcc_ptr += strlen(system_utsname.release) + 1;
3046                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
3047                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
3048                 bcc_ptr++;      /* null domain */
3049                 *bcc_ptr = 0;
3050         }
3051         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
3052         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
3053         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
3054         smb_buffer->smb_buf_length += count;
3055         pSMB->req.ByteCount = cpu_to_le16(count);
3056
3057         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
3058                          &bytes_returned, 1);
3059         if (rc) {
3060 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
3061         } else if ((smb_buffer_response->WordCount == 3)
3062                    || (smb_buffer_response->WordCount == 4)) {
3063                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
3064                 __u16 blob_len =
3065                     le16_to_cpu(pSMBr->resp.SecurityBlobLength);
3066                 if (action & GUEST_LOGIN)
3067                         cFYI(1, (" Guest login"));      /* BB do we want to set anything in SesInfo struct ? */
3068 /*        if(SecurityBlob2->MessageType != NtLm??){
3069                  cFYI("Unexpected message type on auth response is %d "));
3070         } */
3071                 if (ses) {
3072                         cFYI(1,
3073                              ("Does UID on challenge %d match auth response UID %d ",
3074                               ses->Suid, smb_buffer_response->Uid));
3075                         ses->Suid = smb_buffer_response->Uid; /* UID left in wire format */
3076                         bcc_ptr = pByteArea(smb_buffer_response);
3077             /* response can have either 3 or 4 word count - Samba sends 3 */
3078                         if ((pSMBr->resp.hdr.WordCount == 3)
3079                             || ((pSMBr->resp.hdr.WordCount == 4)
3080                                 && (blob_len <
3081                                     pSMBr->resp.ByteCount))) {
3082                                 if (pSMBr->resp.hdr.WordCount == 4) {
3083                                         bcc_ptr +=
3084                                             blob_len;
3085                                         cFYI(1,
3086                                              ("Security Blob Length %d ",
3087                                               blob_len));
3088                                 }
3089
3090                                 cFYI(1,
3091                                      ("NTLMSSP response to Authenticate "));
3092
3093                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3094                                         if ((long) (bcc_ptr) % 2) {
3095                                                 remaining_words =
3096                                                     (BCC(smb_buffer_response)
3097                                                      - 1) / 2;
3098                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
3099                                         } else {
3100                                                 remaining_words = BCC(smb_buffer_response) / 2;
3101                                         }
3102                                         len =
3103                                             UniStrnlen((wchar_t *) bcc_ptr,remaining_words - 1);
3104 /* We look for obvious messed up bcc or strings in response so we do not go off
3105   the end since (at least) WIN2K and Windows XP have a major bug in not null
3106   terminating last Unicode string in response  */
3107                                         ses->serverOS =
3108                                             kzalloc(2 * (len + 1), GFP_KERNEL);
3109                                         cifs_strfromUCS_le(ses->serverOS,
3110                                                            (__le16 *)
3111                                                            bcc_ptr, len,
3112                                                            nls_codepage);
3113                                         bcc_ptr += 2 * (len + 1);
3114                                         remaining_words -= len + 1;
3115                                         ses->serverOS[2 * len] = 0;
3116                                         ses->serverOS[1 + (2 * len)] = 0;
3117                                         if (remaining_words > 0) {
3118                                                 len = UniStrnlen((wchar_t *)
3119                                                                  bcc_ptr,
3120                                                                  remaining_words
3121                                                                  - 1);
3122                                                 ses->serverNOS =
3123                                                     kzalloc(2 * (len + 1),
3124                                                             GFP_KERNEL);
3125                                                 cifs_strfromUCS_le(ses->
3126                                                                    serverNOS,
3127                                                                    (__le16 *)
3128                                                                    bcc_ptr,
3129                                                                    len,
3130                                                                    nls_codepage);
3131                                                 bcc_ptr += 2 * (len + 1);
3132                                                 ses->serverNOS[2 * len] = 0;
3133                                                 ses->serverNOS[1+(2*len)] = 0;
3134                                                 remaining_words -= len + 1;
3135                                                 if (remaining_words > 0) {
3136                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3137      /* last string not always null terminated (e.g. for Windows XP & 2000) */
3138                                                         ses->serverDomain =
3139                                                             kzalloc(2 *
3140                                                                     (len +
3141                                                                      1),
3142                                                                     GFP_KERNEL);
3143                                                         cifs_strfromUCS_le
3144                                                             (ses->
3145                                                              serverDomain,
3146                                                              (__le16 *)
3147                                                              bcc_ptr, len,
3148                                                              nls_codepage);
3149                                                         bcc_ptr +=
3150                                                             2 * (len + 1);
3151                                                         ses->
3152                                                             serverDomain[2
3153                                                                          * len]
3154                                                             = 0;
3155                                                         ses->
3156                                                             serverDomain[1
3157                                                                          +
3158                                                                          (2
3159                                                                           *
3160                                                                           len)]
3161                                                             = 0;
3162                                                 } /* else no more room so create dummy domain string */
3163                                                 else
3164                                                         ses->serverDomain = kzalloc(2,GFP_KERNEL);
3165                                         } else {  /* no room so create dummy domain and NOS string */
3166                                                 ses->serverDomain = kzalloc(2, GFP_KERNEL);
3167                                                 ses->serverNOS = kzalloc(2, GFP_KERNEL);
3168                                         }
3169                                 } else {        /* ASCII */
3170                                         len = strnlen(bcc_ptr, 1024);
3171                                         if (((long) bcc_ptr + len) -
3172                         (long) pByteArea(smb_buffer_response)
3173                             <= BCC(smb_buffer_response)) {
3174                                                 ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
3175                                                 strncpy(ses->serverOS,bcc_ptr, len);
3176
3177                                                 bcc_ptr += len;
3178                                                 bcc_ptr[0] = 0; /* null terminate the string */
3179                                                 bcc_ptr++;
3180
3181                                                 len = strnlen(bcc_ptr, 1024);
3182                                                 ses->serverNOS = kzalloc(len+1,GFP_KERNEL);
3183                                                 strncpy(ses->serverNOS, bcc_ptr, len);
3184                                                 bcc_ptr += len;
3185                                                 bcc_ptr[0] = 0;
3186                                                 bcc_ptr++;
3187
3188                                                 len = strnlen(bcc_ptr, 1024);
3189                                                 ses->serverDomain = kzalloc(len+1,GFP_KERNEL);
3190                                                 strncpy(ses->serverDomain, bcc_ptr, len);
3191                                                 bcc_ptr += len;
3192                                                 bcc_ptr[0] = 0;
3193                                                 bcc_ptr++;
3194                                         } else
3195                                                 cFYI(1,
3196                                                      ("Variable field of length %d extends beyond end of smb ",
3197                                                       len));
3198                                 }
3199                         } else {
3200                                 cERROR(1,
3201                                        (" Security Blob Length extends beyond end of SMB"));
3202                         }
3203                 } else {
3204                         cERROR(1, ("No session structure passed in."));
3205                 }
3206         } else {
3207                 cERROR(1,
3208                        (" Invalid Word count %d: ",
3209                         smb_buffer_response->WordCount));
3210                 rc = -EIO;
3211         }
3212
3213         if (smb_buffer)
3214                 cifs_buf_release(smb_buffer);
3215
3216         return rc;
3217 }
3218
3219 int
3220 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
3221          const char *tree, struct cifsTconInfo *tcon,
3222          const struct nls_table *nls_codepage)
3223 {
3224         struct smb_hdr *smb_buffer;
3225         struct smb_hdr *smb_buffer_response;
3226         TCONX_REQ *pSMB;
3227         TCONX_RSP *pSMBr;
3228         unsigned char *bcc_ptr;
3229         int rc = 0;
3230         int length;
3231         __u16 count;
3232
3233         if (ses == NULL)
3234                 return -EIO;
3235
3236         smb_buffer = cifs_buf_get();
3237         if (smb_buffer == NULL) {
3238                 return -ENOMEM;
3239         }
3240         smb_buffer_response = smb_buffer;
3241
3242         header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3243                         NULL /*no tid */ , 4 /*wct */ );
3244
3245         smb_buffer->Mid = GetNextMid(ses->server);
3246         smb_buffer->Uid = ses->Suid;
3247         pSMB = (TCONX_REQ *) smb_buffer;
3248         pSMBr = (TCONX_RSP *) smb_buffer_response;
3249
3250         pSMB->AndXCommand = 0xFF;
3251         pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3252         bcc_ptr = &pSMB->Password[0];
3253         if((ses->server->secMode) & SECMODE_USER) {
3254                 pSMB->PasswordLength = cpu_to_le16(1);  /* minimum */
3255                 bcc_ptr++;              /* skip password */
3256         } else {
3257                 pSMB->PasswordLength = cpu_to_le16(CIFS_SESSION_KEY_SIZE);
3258                 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3259                    specified as required (when that support is added to
3260                    the vfs in the future) as only NTLM or the much
3261                    weaker LANMAN (which we do not send) is accepted
3262                    by Samba (not sure whether other servers allow
3263                    NTLMv2 password here) */
3264                 SMBNTencrypt(ses->password,
3265                              ses->server->cryptKey,
3266                              bcc_ptr);
3267
3268                 bcc_ptr += CIFS_SESSION_KEY_SIZE;
3269                 *bcc_ptr = 0;
3270                 bcc_ptr++; /* align */
3271         }
3272
3273         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3274                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3275
3276         if (ses->capabilities & CAP_STATUS32) {
3277                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3278         }
3279         if (ses->capabilities & CAP_DFS) {
3280                 smb_buffer->Flags2 |= SMBFLG2_DFS;
3281         }
3282         if (ses->capabilities & CAP_UNICODE) {
3283                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3284                 length =
3285                     cifs_strtoUCS((__le16 *) bcc_ptr, tree, 100, nls_codepage);
3286                 bcc_ptr += 2 * length;  /* convert num of 16 bit words to bytes */
3287                 bcc_ptr += 2;   /* skip trailing null */
3288         } else {                /* ASCII */
3289                 strcpy(bcc_ptr, tree);
3290                 bcc_ptr += strlen(tree) + 1;
3291         }
3292         strcpy(bcc_ptr, "?????");
3293         bcc_ptr += strlen("?????");
3294         bcc_ptr += 1;
3295         count = bcc_ptr - &pSMB->Password[0];
3296         pSMB->hdr.smb_buf_length += count;
3297         pSMB->ByteCount = cpu_to_le16(count);
3298
3299         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, 0);
3300
3301         /* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
3302         /* above now done in SendReceive */
3303         if ((rc == 0) && (tcon != NULL)) {
3304                 tcon->tidStatus = CifsGood;
3305                 tcon->tid = smb_buffer_response->Tid;
3306                 bcc_ptr = pByteArea(smb_buffer_response);
3307                 length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
3308         /* skip service field (NB: this field is always ASCII) */
3309                 bcc_ptr += length + 1;
3310                 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3311                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3312                         length = UniStrnlen((wchar_t *) bcc_ptr, 512);
3313                         if ((bcc_ptr + (2 * length)) -
3314                              pByteArea(smb_buffer_response) <=
3315                             BCC(smb_buffer_response)) {
3316                                 kfree(tcon->nativeFileSystem);
3317                                 tcon->nativeFileSystem =
3318                                     kzalloc(length + 2, GFP_KERNEL);
3319                                 cifs_strfromUCS_le(tcon->nativeFileSystem,
3320                                                    (__le16 *) bcc_ptr,
3321                                                    length, nls_codepage);
3322                                 bcc_ptr += 2 * length;
3323                                 bcc_ptr[0] = 0; /* null terminate the string */
3324                                 bcc_ptr[1] = 0;
3325                                 bcc_ptr += 2;
3326                         }
3327                         /* else do not bother copying these informational fields */
3328                 } else {
3329                         length = strnlen(bcc_ptr, 1024);
3330                         if ((bcc_ptr + length) -
3331                             pByteArea(smb_buffer_response) <=
3332                             BCC(smb_buffer_response)) {
3333                                 kfree(tcon->nativeFileSystem);
3334                                 tcon->nativeFileSystem =
3335                                     kzalloc(length + 1, GFP_KERNEL);
3336                                 strncpy(tcon->nativeFileSystem, bcc_ptr,
3337                                         length);
3338                         }
3339                         /* else do not bother copying these informational fields */
3340                 }
3341                 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3342                 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
3343         } else if ((rc == 0) && tcon == NULL) {
3344         /* all we need to save for IPC$ connection */
3345                 ses->ipc_tid = smb_buffer_response->Tid;
3346         }
3347
3348         if (smb_buffer)
3349                 cifs_buf_release(smb_buffer);
3350         return rc;
3351 }
3352
3353 int
3354 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3355 {
3356         int rc = 0;
3357         int xid;
3358         struct cifsSesInfo *ses = NULL;
3359         struct task_struct *cifsd_task;
3360
3361         xid = GetXid();
3362
3363         if (cifs_sb->tcon) {
3364                 ses = cifs_sb->tcon->ses; /* save ptr to ses before delete tcon!*/
3365                 rc = CIFSSMBTDis(xid, cifs_sb->tcon);
3366                 if (rc == -EBUSY) {
3367                         FreeXid(xid);
3368                         return 0;
3369                 }
3370                 tconInfoFree(cifs_sb->tcon);
3371                 if ((ses) && (ses->server)) {
3372                         /* save off task so we do not refer to ses later */
3373                         cifsd_task = ses->server->tsk;
3374                         cFYI(1, ("About to do SMBLogoff "));
3375                         rc = CIFSSMBLogoff(xid, ses);
3376                         if (rc == -EBUSY) {
3377                                 FreeXid(xid);
3378                                 return 0;
3379                         } else if (rc == -ESHUTDOWN) {
3380                                 cFYI(1,("Waking up socket by sending it signal"));
3381                                 if(cifsd_task) {
3382                                         send_sig(SIGKILL,cifsd_task,1);
3383                                         wait_for_completion(&cifsd_complete);
3384                                 }
3385                                 rc = 0;
3386                         } /* else - we have an smb session
3387                                 left on this socket do not kill cifsd */
3388                 } else
3389                         cFYI(1, ("No session or bad tcon"));
3390         }
3391
3392         cifs_sb->tcon = NULL;
3393         if (ses)
3394                 schedule_timeout_interruptible(msecs_to_jiffies(500));
3395         if (ses)
3396                 sesInfoFree(ses);
3397
3398         FreeXid(xid);
3399         return rc;              /* BB check if we should always return zero here */
3400 }
3401
3402 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3403                                            struct nls_table * nls_info)
3404 {
3405         int rc = 0;
3406         char ntlm_session_key[CIFS_SESSION_KEY_SIZE];
3407         int ntlmv2_flag = FALSE;
3408         int first_time = 0;
3409
3410         /* what if server changes its buffer size after dropping the session? */
3411         if(pSesInfo->server->maxBuf == 0) /* no need to send on reconnect */ {
3412                 rc = CIFSSMBNegotiate(xid, pSesInfo);
3413                 if(rc == -EAGAIN) /* retry only once on 1st time connection */ {
3414                         rc = CIFSSMBNegotiate(xid, pSesInfo);
3415                         if(rc == -EAGAIN)
3416                                 rc = -EHOSTDOWN;
3417                 }
3418                 if(rc == 0) {
3419                         spin_lock(&GlobalMid_Lock);
3420                         if(pSesInfo->server->tcpStatus != CifsExiting)
3421                                 pSesInfo->server->tcpStatus = CifsGood;
3422                         else
3423                                 rc = -EHOSTDOWN;
3424                         spin_unlock(&GlobalMid_Lock);
3425
3426                 }
3427                 first_time = 1;
3428         }
3429         if (!rc) {
3430                 pSesInfo->capabilities = pSesInfo->server->capabilities;
3431                 if(linuxExtEnabled == 0)
3432                         pSesInfo->capabilities &= (~CAP_UNIX);
3433         /*      pSesInfo->sequence_number = 0;*/
3434                 cFYI(1,("Security Mode: 0x%x Capabilities: 0x%x Time Zone: %d",
3435                         pSesInfo->server->secMode,
3436                         pSesInfo->server->capabilities,
3437                         pSesInfo->server->timeZone));
3438                 if (extended_security
3439                                 && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3440                                 && (pSesInfo->server->secType == NTLMSSP)) {
3441                         cFYI(1, ("New style sesssetup "));
3442                         rc = CIFSSpnegoSessSetup(xid, pSesInfo,
3443                                 NULL /* security blob */,
3444                                 0 /* blob length */,
3445                                 nls_info);
3446                 } else if (extended_security
3447                            && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3448                            && (pSesInfo->server->secType == RawNTLMSSP)) {
3449                         cFYI(1, ("NTLMSSP sesssetup "));
3450                         rc = CIFSNTLMSSPNegotiateSessSetup(xid,
3451                                                 pSesInfo,
3452                                                 &ntlmv2_flag,
3453                                                 nls_info);
3454                         if (!rc) {
3455                                 if(ntlmv2_flag) {
3456                                         char * v2_response;
3457                                         cFYI(1,("Can use more secure NTLM version 2 password hash"));
3458                                         if(CalcNTLMv2_partial_mac_key(pSesInfo,
3459                                                 nls_info)) {
3460                                                 rc = -ENOMEM;
3461                                                 goto ss_err_exit;
3462                                         } else
3463                                                 v2_response = kmalloc(16 + 64 /* blob */, GFP_KERNEL);
3464                                         if(v2_response) {
3465                                                 CalcNTLMv2_response(pSesInfo,v2_response);
3466                                 /*              if(first_time)
3467                                                         cifs_calculate_ntlmv2_mac_key(
3468                                                           pSesInfo->server->mac_signing_key,
3469                                                           response, ntlm_session_key, */
3470                                                 kfree(v2_response);
3471                                         /* BB Put dummy sig in SessSetup PDU? */
3472                                         } else {
3473                                                 rc = -ENOMEM;
3474                                                 goto ss_err_exit;
3475                                         }
3476
3477                                 } else {
3478                                         SMBNTencrypt(pSesInfo->password,
3479                                                 pSesInfo->server->cryptKey,
3480                                                 ntlm_session_key);
3481
3482                                         if(first_time)
3483                                                 cifs_calculate_mac_key(
3484                                                         pSesInfo->server->mac_signing_key,
3485                                                         ntlm_session_key,
3486                                                         pSesInfo->password);
3487                                 }
3488                         /* for better security the weaker lanman hash not sent
3489                            in AuthSessSetup so we no longer calculate it */
3490
3491                                 rc = CIFSNTLMSSPAuthSessSetup(xid,
3492                                         pSesInfo,
3493                                         ntlm_session_key,
3494                                         ntlmv2_flag,
3495                                         nls_info);
3496                         }
3497                 } else { /* old style NTLM 0.12 session setup */
3498                         SMBNTencrypt(pSesInfo->password,
3499                                 pSesInfo->server->cryptKey,
3500                                 ntlm_session_key);
3501
3502                         if(first_time)
3503                                 cifs_calculate_mac_key(
3504                                         pSesInfo->server->mac_signing_key,
3505                                         ntlm_session_key, pSesInfo->password);
3506
3507                         rc = CIFSSessSetup(xid, pSesInfo,
3508                                 ntlm_session_key, nls_info);
3509                 }
3510                 if (rc) {
3511                         cERROR(1,("Send error in SessSetup = %d",rc));
3512                 } else {
3513                         cFYI(1,("CIFS Session Established successfully"));
3514                         pSesInfo->status = CifsGood;
3515                 }
3516         }
3517 ss_err_exit:
3518         return rc;
3519 }
3520