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   1 /*
   2  *   fs/cifs/connect.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2005
   5  *   Author(s): Steve French (sfrench@us.ibm.com)
   6  *
   7  *   This library is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU Lesser General Public License as published
   9  *   by the Free Software Foundation; either version 2.1 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This library is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  15  *   the GNU Lesser General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU Lesser General Public License
  18  *   along with this library; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21 #include <linux/fs.h>
  22 #include <linux/net.h>
  23 #include <linux/string.h>
  24 #include <linux/list.h>
  25 #include <linux/wait.h>
  26 #include <linux/ipv6.h>
  27 #include <linux/pagemap.h>
  28 #include <linux/ctype.h>
  29 #include <linux/utsname.h>
  30 #include <linux/mempool.h>
  31 #include <linux/delay.h>
  32 #include <linux/completion.h>
  33 #include <linux/pagevec.h>
  34 #include <asm/uaccess.h>
  35 #include <asm/processor.h>
  36 #include "cifspdu.h"
  37 #include "cifsglob.h"
  38 #include "cifsproto.h"
  39 #include "cifs_unicode.h"
  40 #include "cifs_debug.h"
  41 #include "cifs_fs_sb.h"
  42 #include "ntlmssp.h"
  43 #include "nterr.h"
  44 #include "rfc1002pdu.h"
  45 #include "cn_cifs.h"
  46
  47 #define CIFS_PORT 445
  48 #define RFC1001_PORT 139
  49
  50 static DECLARE_COMPLETION(cifsd_complete);
  51
  52 extern void SMBencrypt(unsigned char *passwd, unsigned char *c8,
  53                        unsigned char *p24);
  54 extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
  55                          unsigned char *p24);
  56
  57 extern mempool_t *cifs_req_poolp;
  58
  59 struct smb_vol {
  60         char *username;
  61         char *password;
  62         char *domainname;
  63         char *UNC;
  64         char *UNCip;
  65         char *in6_addr;  /* ipv6 address as human readable form of in6_addr */
  66         char *iocharset;  /* local code page for mapping to and from Unicode */
  67         char source_rfc1001_name[16]; /* netbios name of client */
  68         char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
  69         uid_t linux_uid;
  70         gid_t linux_gid;
  71         mode_t file_mode;
  72         mode_t dir_mode;
  73         unsigned rw:1;
  74         unsigned retry:1;
  75         unsigned intr:1;
  76         unsigned setuids:1;
  77         unsigned noperm:1;
  78         unsigned no_psx_acl:1; /* set if posix acl support should be disabled */
  79         unsigned cifs_acl:1;
  80         unsigned no_xattr:1;   /* set if xattr (EA) support should be disabled*/
  81         unsigned server_ino:1; /* use inode numbers from server ie UniqueId */
  82         unsigned direct_io:1;
  83         unsigned remap:1;   /* set to remap seven reserved chars in filenames */
  84         unsigned posix_paths:1;   /* unset to not ask for posix pathnames. */
  85         unsigned sfu_emul:1;
  86         unsigned krb5:1;
  87         unsigned ntlm:1;
  88         unsigned ntlmv2:1;
  89         unsigned nullauth:1; /* attempt to authenticate with null user */
  90         unsigned sign:1;
  91         unsigned seal:1;     /* encrypt */
  92         unsigned nocase;     /* request case insensitive filenames */
  93         unsigned nobrl;      /* disable sending byte range locks to srv */
  94         unsigned int rsize;
  95         unsigned int wsize;
  96         unsigned int sockopt;
  97         unsigned short int port;
  98 };
  99
 100 static int ipv4_connect(struct sockaddr_in *psin_server,
 101                         struct socket **csocket,
 102                         char * netb_name,
 103                         char * server_netb_name);
 104 static int ipv6_connect(struct sockaddr_in6 *psin_server,
 105                         struct socket **csocket);
 106
 107
 108         /*
 109          * cifs tcp session reconnection
 110          *
 111          * mark tcp session as reconnecting so temporarily locked
 112          * mark all smb sessions as reconnecting for tcp session
 113          * reconnect tcp session
 114          * wake up waiters on reconnection? - (not needed currently)
 115          */
 116
 117 int
 118 cifs_reconnect(struct TCP_Server_Info *server)
 119 {
 120         int rc = 0;
 121         struct list_head *tmp;
 122         struct cifsSesInfo *ses;
 123         struct cifsTconInfo *tcon;
 124         struct mid_q_entry * mid_entry;
 125
 126         spin_lock(&GlobalMid_Lock);
 127         if(server->tcpStatus == CifsExiting) {
 128                 /* the demux thread will exit normally
 129                 next time through the loop */
 130                 spin_unlock(&GlobalMid_Lock);
 131                 return rc;
 132         } else
 133                 server->tcpStatus = CifsNeedReconnect;
 134         spin_unlock(&GlobalMid_Lock);
 135         server->maxBuf = 0;
 136
 137         cFYI(1, ("Reconnecting tcp session"));
 138
 139         /* before reconnecting the tcp session, mark the smb session (uid)
 140                 and the tid bad so they are not used until reconnected */
 141         read_lock(&GlobalSMBSeslock);
 142         list_for_each(tmp, &GlobalSMBSessionList) {
 143                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
 144                 if (ses->server) {
 145                         if (ses->server == server) {
 146                                 ses->status = CifsNeedReconnect;
 147                                 ses->ipc_tid = 0;
 148                         }
 149                 }
 150                 /* else tcp and smb sessions need reconnection */
 151         }
 152         list_for_each(tmp, &GlobalTreeConnectionList) {
 153                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
 154                 if((tcon) && (tcon->ses) && (tcon->ses->server == server)) {
 155                         tcon->tidStatus = CifsNeedReconnect;
 156                 }
 157         }
 158         read_unlock(&GlobalSMBSeslock);
 159         /* do not want to be sending data on a socket we are freeing */
 160         down(&server->tcpSem);
 161         if(server->ssocket) {
 162                 cFYI(1,("State: 0x%x Flags: 0x%lx", server->ssocket->state,
 163                         server->ssocket->flags));
 164                 server->ssocket->ops->shutdown(server->ssocket,SEND_SHUTDOWN);
 165                 cFYI(1,("Post shutdown state: 0x%x Flags: 0x%lx", server->ssocket->state,
 166                         server->ssocket->flags));
 167                 sock_release(server->ssocket);
 168                 server->ssocket = NULL;
 169         }
 170
 171         spin_lock(&GlobalMid_Lock);
 172         list_for_each(tmp, &server->pending_mid_q) {
 173                 mid_entry = list_entry(tmp, struct
 174                                         mid_q_entry,
 175                                         qhead);
 176                 if(mid_entry) {
 177                         if(mid_entry->midState == MID_REQUEST_SUBMITTED) {
 178                                 /* Mark other intransit requests as needing
 179                                    retry so we do not immediately mark the
 180                                    session bad again (ie after we reconnect
 181                                    below) as they timeout too */
 182                                 mid_entry->midState = MID_RETRY_NEEDED;
 183                         }
 184                 }
 185         }
 186         spin_unlock(&GlobalMid_Lock);
 187         up(&server->tcpSem);
 188
 189         while ((server->tcpStatus != CifsExiting) && (server->tcpStatus != CifsGood))
 190         {
 191                 if(server->protocolType == IPV6) {
 192                         rc = ipv6_connect(&server->addr.sockAddr6,&server->ssocket);
 193                 } else {
 194                         rc = ipv4_connect(&server->addr.sockAddr,
 195                                         &server->ssocket,
 196                                         server->workstation_RFC1001_name,
 197                                         server->server_RFC1001_name);
 198                 }
 199                 if(rc) {
 200                         cFYI(1,("reconnect error %d",rc));
 201                         msleep(3000);
 202                 } else {
 203                         atomic_inc(&tcpSesReconnectCount);
 204                         spin_lock(&GlobalMid_Lock);
 205                         if(server->tcpStatus != CifsExiting)
 206                                 server->tcpStatus = CifsGood;
 207                         server->sequence_number = 0;
 208                         spin_unlock(&GlobalMid_Lock);
 209         /*              atomic_set(&server->inFlight,0);*/
 210                         wake_up(&server->response_q);
 211                 }
 212         }
 213         return rc;
 214 }
 215
 216 /*
 217         return codes:
 218                 0       not a transact2, or all data present
 219                 >0      transact2 with that much data missing
 220                 -EINVAL = invalid transact2
 221
 222  */
 223 static int check2ndT2(struct smb_hdr * pSMB, unsigned int maxBufSize)
 224 {
 225         struct smb_t2_rsp * pSMBt;
 226         int total_data_size;
 227         int data_in_this_rsp;
 228         int remaining;
 229
 230         if(pSMB->Command != SMB_COM_TRANSACTION2)
 231                 return 0;
 232
 233         /* check for plausible wct, bcc and t2 data and parm sizes */
 234         /* check for parm and data offset going beyond end of smb */
 235         if(pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
 236                 cFYI(1,("invalid transact2 word count"));
 237                 return -EINVAL;
 238         }
 239
 240         pSMBt = (struct smb_t2_rsp *)pSMB;
 241
 242         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 243         data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 244
 245         remaining = total_data_size - data_in_this_rsp;
 246
 247         if(remaining == 0)
 248                 return 0;
 249         else if(remaining < 0) {
 250                 cFYI(1,("total data %d smaller than data in frame %d",
 251                         total_data_size, data_in_this_rsp));
 252                 return -EINVAL;
 253         } else {
 254                 cFYI(1,("missing %d bytes from transact2, check next response",
 255                         remaining));
 256                 if(total_data_size > maxBufSize) {
 257                         cERROR(1,("TotalDataSize %d is over maximum buffer %d",
 258                                 total_data_size,maxBufSize));
 259                         return -EINVAL;
 260                 }
 261                 return remaining;
 262         }
 263 }
 264
 265 static int coalesce_t2(struct smb_hdr * psecond, struct smb_hdr *pTargetSMB)
 266 {
 267         struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
 268         struct smb_t2_rsp *pSMBt  = (struct smb_t2_rsp *)pTargetSMB;
 269         int total_data_size;
 270         int total_in_buf;
 271         int remaining;
 272         int total_in_buf2;
 273         char * data_area_of_target;
 274         char * data_area_of_buf2;
 275         __u16 byte_count;
 276
 277         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 278
 279         if(total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
 280                 cFYI(1,("total data sizes of primary and secondary t2 differ"));
 281         }
 282
 283         total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 284
 285         remaining = total_data_size - total_in_buf;
 286
 287         if(remaining < 0)
 288                 return -EINVAL;
 289
 290         if(remaining == 0) /* nothing to do, ignore */
 291                 return 0;
 292
 293         total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
 294         if(remaining < total_in_buf2) {
 295                 cFYI(1,("transact2 2nd response contains too much data"));
 296         }
 297
 298         /* find end of first SMB data area */
 299         data_area_of_target = (char *)&pSMBt->hdr.Protocol +
 300                                 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
 301         /* validate target area */
 302
 303         data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
 304                                         le16_to_cpu(pSMB2->t2_rsp.DataOffset);
 305
 306         data_area_of_target += total_in_buf;
 307
 308         /* copy second buffer into end of first buffer */
 309         memcpy(data_area_of_target,data_area_of_buf2,total_in_buf2);
 310         total_in_buf += total_in_buf2;
 311         pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
 312         byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
 313         byte_count += total_in_buf2;
 314         BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
 315
 316         byte_count = pTargetSMB->smb_buf_length;
 317         byte_count += total_in_buf2;
 318
 319         /* BB also add check that we are not beyond maximum buffer size */
 320
 321         pTargetSMB->smb_buf_length = byte_count;
 322
 323         if(remaining == total_in_buf2) {
 324                 cFYI(1,("found the last secondary response"));
 325                 return 0; /* we are done */
 326         } else /* more responses to go */
 327                 return 1;
 328
 329 }
 330
 331 static int
 332 cifs_demultiplex_thread(struct TCP_Server_Info *server)
 333 {
 334         int length;
 335         unsigned int pdu_length, total_read;
 336         struct smb_hdr *smb_buffer = NULL;
 337         struct smb_hdr *bigbuf = NULL;
 338         struct smb_hdr *smallbuf = NULL;
 339         struct msghdr smb_msg;
 340         struct kvec iov;
 341         struct socket *csocket = server->ssocket;
 342         struct list_head *tmp;
 343         struct cifsSesInfo *ses;
 344         struct task_struct *task_to_wake = NULL;
 345         struct mid_q_entry *mid_entry;
 346         char temp;
 347         int isLargeBuf = FALSE;
 348         int isMultiRsp;
 349         int reconnect;
 350
 351         daemonize("cifsd");
 352         allow_signal(SIGKILL);
 353         current->flags |= PF_MEMALLOC;
 354         server->tsk = current;  /* save process info to wake at shutdown */
 355         cFYI(1, ("Demultiplex PID: %d", current->pid));
 356         write_lock(&GlobalSMBSeslock);
 357         atomic_inc(&tcpSesAllocCount);
 358         length = tcpSesAllocCount.counter;
 359         write_unlock(&GlobalSMBSeslock);
 360         complete(&cifsd_complete);
 361         if(length  > 1) {
 362                 mempool_resize(cifs_req_poolp,
 363                         length + cifs_min_rcv,
 364                         GFP_KERNEL);
 365         }
 366
 367         while (server->tcpStatus != CifsExiting) {
 368                 if (try_to_freeze())
 369                         continue;
 370                 if (bigbuf == NULL) {
 371                         bigbuf = cifs_buf_get();
 372                         if(bigbuf == NULL) {
 373                                 cERROR(1,("No memory for large SMB response"));
 374                                 msleep(3000);
 375                                 /* retry will check if exiting */
 376                                 continue;
 377                         }
 378                 } else if(isLargeBuf) {
 379                         /* we are reusing a dirtry large buf, clear its start */
 380                         memset(bigbuf, 0, sizeof (struct smb_hdr));
 381                 }
 382
 383                 if (smallbuf == NULL) {
 384                         smallbuf = cifs_small_buf_get();
 385                         if(smallbuf == NULL) {
 386                                 cERROR(1,("No memory for SMB response"));
 387                                 msleep(1000);
 388                                 /* retry will check if exiting */
 389                                 continue;
 390                         }
 391                         /* beginning of smb buffer is cleared in our buf_get */
 392                 } else /* if existing small buf clear beginning */
 393                         memset(smallbuf, 0, sizeof (struct smb_hdr));
 394
 395                 isLargeBuf = FALSE;
 396                 isMultiRsp = FALSE;
 397                 smb_buffer = smallbuf;
 398                 iov.iov_base = smb_buffer;
 399                 iov.iov_len = 4;
 400                 smb_msg.msg_control = NULL;
 401                 smb_msg.msg_controllen = 0;
 402                 length =
 403                     kernel_recvmsg(csocket, &smb_msg,
 404                                  &iov, 1, 4, 0 /* BB see socket.h flags */);
 405
 406                 if(server->tcpStatus == CifsExiting) {
 407                         break;
 408                 } else if (server->tcpStatus == CifsNeedReconnect) {
 409                         cFYI(1,("Reconnect after server stopped responding"));
 410                         cifs_reconnect(server);
 411                         cFYI(1,("call to reconnect done"));
 412                         csocket = server->ssocket;
 413                         continue;
 414                 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
 415                         msleep(1); /* minimum sleep to prevent looping
 416                                 allowing socket to clear and app threads to set
 417                                 tcpStatus CifsNeedReconnect if server hung */
 418                         continue;
 419                 } else if (length <= 0) {
 420                         if(server->tcpStatus == CifsNew) {
 421                                 cFYI(1,("tcp session abend after SMBnegprot"));
 422                                 /* some servers kill the TCP session rather than
 423                                    returning an SMB negprot error, in which
 424                                    case reconnecting here is not going to help,
 425                                    and so simply return error to mount */
 426                                 break;
 427                         }
 428                         if(length == -EINTR) {
 429                                 cFYI(1,("cifsd thread killed"));
 430                                 break;
 431                         }
 432                         cFYI(1,("Reconnect after unexpected peek error %d",
 433                                 length));
 434                         cifs_reconnect(server);
 435                         csocket = server->ssocket;
 436                         wake_up(&server->response_q);
 437                         continue;
 438                 } else if (length < 4) {
 439                         cFYI(1,
 440                             ("Frame under four bytes received (%d bytes long)",
 441                               length));
 442                         cifs_reconnect(server);
 443                         csocket = server->ssocket;
 444                         wake_up(&server->response_q);
 445                         continue;
 446                 }
 447
 448                 /* The right amount was read from socket - 4 bytes */
 449                 /* so we can now interpret the length field */
 450
 451                 /* the first byte big endian of the length field,
 452                 is actually not part of the length but the type
 453                 with the most common, zero, as regular data */
 454                 temp = *((char *) smb_buffer);
 455
 456                 /* Note that FC 1001 length is big endian on the wire,
 457                 but we convert it here so it is always manipulated
 458                 as host byte order */
 459                 pdu_length = ntohl(smb_buffer->smb_buf_length);
 460                 smb_buffer->smb_buf_length = pdu_length;
 461
 462                 cFYI(1,("rfc1002 length 0x%x)", pdu_length+4));
 463
 464                 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
 465                         continue;
 466                 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
 467                         cFYI(1,("Good RFC 1002 session rsp"));
 468                         continue;
 469                 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
 470                         /* we get this from Windows 98 instead of
 471                            an error on SMB negprot response */
 472                         cFYI(1,("Negative RFC1002 Session Response Error 0x%x)",
 473                                 pdu_length));
 474                         if(server->tcpStatus == CifsNew) {
 475                                 /* if nack on negprot (rather than
 476                                 ret of smb negprot error) reconnecting
 477                                 not going to help, ret error to mount */
 478                                 break;
 479                         } else {
 480                                 /* give server a second to
 481                                 clean up before reconnect attempt */
 482                                 msleep(1000);
 483                                 /* always try 445 first on reconnect
 484                                 since we get NACK on some if we ever
 485                                 connected to port 139 (the NACK is
 486                                 since we do not begin with RFC1001
 487                                 session initialize frame) */
 488                                 server->addr.sockAddr.sin_port =
 489                                         htons(CIFS_PORT);
 490                                 cifs_reconnect(server);
 491                                 csocket = server->ssocket;
 492                                 wake_up(&server->response_q);
 493                                 continue;
 494                         }
 495                 } else if (temp != (char) 0) {
 496                         cERROR(1,("Unknown RFC 1002 frame"));
 497                         cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
 498                                       length);
 499                         cifs_reconnect(server);
 500                         csocket = server->ssocket;
 501                         continue;
 502                 }
 503
 504                 /* else we have an SMB response */
 505                 if((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
 506                             (pdu_length < sizeof (struct smb_hdr) - 1 - 4)) {
 507                         cERROR(1, ("Invalid size SMB length %d pdu_length %d",
 508                                         length, pdu_length+4));
 509                         cifs_reconnect(server);
 510                         csocket = server->ssocket;
 511                         wake_up(&server->response_q);
 512                         continue;
 513                 }
 514
 515                 /* else length ok */
 516                 reconnect = 0;
 517
 518                 if(pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
 519                         isLargeBuf = TRUE;
 520                         memcpy(bigbuf, smallbuf, 4);
 521                         smb_buffer = bigbuf;
 522                 }
 523                 length = 0;
 524                 iov.iov_base = 4 + (char *)smb_buffer;
 525                 iov.iov_len = pdu_length;
 526                 for (total_read = 0; total_read < pdu_length;
 527                      total_read += length) {
 528                         length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
 529                                                 pdu_length - total_read, 0);
 530                         if((server->tcpStatus == CifsExiting) ||
 531                             (length == -EINTR)) {
 532                                 /* then will exit */
 533                                 reconnect = 2;
 534                                 break;
 535                         } else if (server->tcpStatus == CifsNeedReconnect) {
 536                                 cifs_reconnect(server);
 537                                 csocket = server->ssocket;
 538                                 /* Reconnect wakes up rspns q */
 539                                 /* Now we will reread sock */
 540                                 reconnect = 1;
 541                                 break;
 542                         } else if ((length == -ERESTARTSYS) ||
 543                                    (length == -EAGAIN)) {
 544                                 msleep(1); /* minimum sleep to prevent looping,
 545                                               allowing socket to clear and app
 546                                               threads to set tcpStatus
 547                                               CifsNeedReconnect if server hung*/
 548                                 continue;
 549                         } else if (length <= 0) {
 550                                 cERROR(1,("Received no data, expecting %d",
 551                                               pdu_length - total_read));
 552                                 cifs_reconnect(server);
 553                                 csocket = server->ssocket;
 554                                 reconnect = 1;
 555                                 break;
 556                         }
 557                 }
 558                 if(reconnect == 2)
 559                         break;
 560                 else if(reconnect == 1)
 561                         continue;
 562
 563                 length += 4; /* account for rfc1002 hdr */
 564
 565
 566                 dump_smb(smb_buffer, length);
 567                 if (checkSMB (smb_buffer, smb_buffer->Mid, total_read+4)) {
 568                         cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
 569                         continue;
 570                 }
 571
 572
 573                 task_to_wake = NULL;
 574                 spin_lock(&GlobalMid_Lock);
 575                 list_for_each(tmp, &server->pending_mid_q) {
 576                         mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 577
 578                         if ((mid_entry->mid == smb_buffer->Mid) &&
 579                             (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
 580                             (mid_entry->command == smb_buffer->Command)) {
 581                                 if(check2ndT2(smb_buffer,server->maxBuf) > 0) {
 582                                         /* We have a multipart transact2 resp */
 583                                         isMultiRsp = TRUE;
 584                                         if(mid_entry->resp_buf) {
 585                                                 /* merge response - fix up 1st*/
 586                                                 if(coalesce_t2(smb_buffer,
 587                                                         mid_entry->resp_buf)) {
 588                                                         break;
 589                                                 } else {
 590                                                         /* all parts received */
 591                                                         goto multi_t2_fnd;
 592                                                 }
 593                                         } else {
 594                                                 if(!isLargeBuf) {
 595                                                         cERROR(1,("1st trans2 resp needs bigbuf"));
 596                                         /* BB maybe we can fix this up,  switch
 597                                            to already allocated large buffer? */
 598                                                 } else {
 599                                                         /* Have first buffer */
 600                                                         mid_entry->resp_buf =
 601                                                                  smb_buffer;
 602                                                         mid_entry->largeBuf = 1;
 603                                                         bigbuf = NULL;
 604                                                 }
 605                                         }
 606                                         break;
 607                                 }
 608                                 mid_entry->resp_buf = smb_buffer;
 609                                 if(isLargeBuf)
 610                                         mid_entry->largeBuf = 1;
 611                                 else
 612                                         mid_entry->largeBuf = 0;
 613 multi_t2_fnd:
 614                                 task_to_wake = mid_entry->tsk;
 615                                 mid_entry->midState = MID_RESPONSE_RECEIVED;
 616 #ifdef CONFIG_CIFS_STATS2
 617                                 mid_entry->when_received = jiffies;
 618 #endif
 619                                 break;
 620                         }
 621                 }
 622                 spin_unlock(&GlobalMid_Lock);
 623                 if (task_to_wake) {
 624                         /* Was previous buf put in mpx struct for multi-rsp? */
 625                         if(!isMultiRsp) {
 626                                 /* smb buffer will be freed by user thread */
 627                                 if(isLargeBuf) {
 628                                         bigbuf = NULL;
 629                                 } else
 630                                         smallbuf = NULL;
 631                         }
 632                         wake_up_process(task_to_wake);
 633                 } else if ((is_valid_oplock_break(smb_buffer) == FALSE)
 634                     && (isMultiRsp == FALSE)) {
 635                         cERROR(1, ("No task to wake, unknown frame rcvd!"));
 636                         cifs_dump_mem("Received Data is: ",(char *)smb_buffer,
 637                                       sizeof(struct smb_hdr));
 638                 }
 639         } /* end while !EXITING */
 640
 641         spin_lock(&GlobalMid_Lock);
 642         server->tcpStatus = CifsExiting;
 643         server->tsk = NULL;
 644         /* check if we have blocked requests that need to free */
 645         /* Note that cifs_max_pending is normally 50, but
 646         can be set at module install time to as little as two */
 647         if(atomic_read(&server->inFlight) >= cifs_max_pending)
 648                 atomic_set(&server->inFlight, cifs_max_pending - 1);
 649         /* We do not want to set the max_pending too low or we
 650         could end up with the counter going negative */
 651         spin_unlock(&GlobalMid_Lock);
 652         /* Although there should not be any requests blocked on
 653         this queue it can not hurt to be paranoid and try to wake up requests
 654         that may haven been blocked when more than 50 at time were on the wire
 655         to the same server - they now will see the session is in exit state
 656         and get out of SendReceive.  */
 657         wake_up_all(&server->request_q);
 658         /* give those requests time to exit */
 659         msleep(125);
 660
 661         if(server->ssocket) {
 662                 sock_release(csocket);
 663                 server->ssocket = NULL;
 664         }
 665         /* buffer usuallly freed in free_mid - need to free it here on exit */
 666         if (bigbuf != NULL)
 667                 cifs_buf_release(bigbuf);
 668         if (smallbuf != NULL)
 669                 cifs_small_buf_release(smallbuf);
 670
 671         read_lock(&GlobalSMBSeslock);
 672         if (list_empty(&server->pending_mid_q)) {
 673                 /* loop through server session structures attached to this and
 674                     mark them dead */
 675                 list_for_each(tmp, &GlobalSMBSessionList) {
 676                         ses =
 677                             list_entry(tmp, struct cifsSesInfo,
 678                                        cifsSessionList);
 679                         if (ses->server == server) {
 680                                 ses->status = CifsExiting;
 681                                 ses->server = NULL;
 682                         }
 683                 }
 684                 read_unlock(&GlobalSMBSeslock);
 685         } else {
 686                 /* although we can not zero the server struct pointer yet,
 687                 since there are active requests which may depnd on them,
 688                 mark the corresponding SMB sessions as exiting too */
 689                 list_for_each(tmp, &GlobalSMBSessionList) {
 690                         ses = list_entry(tmp, struct cifsSesInfo,
 691                                          cifsSessionList);
 692                         if (ses->server == server) {
 693                                 ses->status = CifsExiting;
 694                         }
 695                 }
 696
 697                 spin_lock(&GlobalMid_Lock);
 698                 list_for_each(tmp, &server->pending_mid_q) {
 699                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 700                         if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
 701                                 cFYI(1,
 702                                   ("Clearing Mid 0x%x - waking up ",mid_entry->mid));
 703                                 task_to_wake = mid_entry->tsk;
 704                                 if(task_to_wake) {
 705                                         wake_up_process(task_to_wake);
 706                                 }
 707                         }
 708                 }
 709                 spin_unlock(&GlobalMid_Lock);
 710                 read_unlock(&GlobalSMBSeslock);
 711                 /* 1/8th of sec is more than enough time for them to exit */
 712                 msleep(125);
 713         }
 714
 715         if (!list_empty(&server->pending_mid_q)) {
 716                 /* mpx threads have not exited yet give them
 717                 at least the smb send timeout time for long ops */
 718                 /* due to delays on oplock break requests, we need
 719                 to wait at least 45 seconds before giving up
 720                 on a request getting a response and going ahead
 721                 and killing cifsd */
 722                 cFYI(1, ("Wait for exit from demultiplex thread"));
 723                 msleep(46000);
 724                 /* if threads still have not exited they are probably never
 725                 coming home not much else we can do but free the memory */
 726         }
 727
 728         write_lock(&GlobalSMBSeslock);
 729         atomic_dec(&tcpSesAllocCount);
 730         length = tcpSesAllocCount.counter;
 731
 732         /* last chance to mark ses pointers invalid
 733         if there are any pointing to this (e.g
 734         if a crazy root user tried to kill cifsd
 735         kernel thread explicitly this might happen) */
 736         list_for_each(tmp, &GlobalSMBSessionList) {
 737                 ses = list_entry(tmp, struct cifsSesInfo,
 738                                 cifsSessionList);
 739                 if (ses->server == server) {
 740                         ses->server = NULL;
 741                 }
 742         }
 743         write_unlock(&GlobalSMBSeslock);
 744
 745         kfree(server);
 746         if(length  > 0) {
 747                 mempool_resize(cifs_req_poolp,
 748                         length + cifs_min_rcv,
 749                         GFP_KERNEL);
 750         }
 751
 752         complete_and_exit(&cifsd_complete, 0);
 753         return 0;
 754 }
 755
 756 static int
 757 cifs_parse_mount_options(char *options, const char *devname,struct smb_vol *vol)
 758 {
 759         char *value;
 760         char *data;
 761         unsigned int  temp_len, i, j;
 762         char separator[2];
 763
 764         separator[0] = ',';
 765         separator[1] = 0;
 766
 767         memset(vol->source_rfc1001_name,0x20,15);
 768         for(i=0;i < strnlen(system_utsname.nodename,15);i++) {
 769                 /* does not have to be a perfect mapping since the field is
 770                 informational, only used for servers that do not support
 771                 port 445 and it can be overridden at mount time */
 772                 vol->source_rfc1001_name[i] =
 773                         toupper(system_utsname.nodename[i]);
 774         }
 775         vol->source_rfc1001_name[15] = 0;
 776         /* null target name indicates to use *SMBSERVR default called name
 777            if we end up sending RFC1001 session initialize */
 778         vol->target_rfc1001_name[0] = 0;
 779         vol->linux_uid = current->uid;  /* current->euid instead? */
 780         vol->linux_gid = current->gid;
 781         vol->dir_mode = S_IRWXUGO;
 782         /* 2767 perms indicate mandatory locking support */
 783         vol->file_mode = S_IALLUGO & ~(S_ISUID | S_IXGRP);
 784
 785         /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
 786         vol->rw = TRUE;
 787         vol->ntlm = TRUE;
 788         /* default is always to request posix paths. */
 789         vol->posix_paths = 1;
 790
 791         if (!options)
 792                 return 1;
 793
 794         if(strncmp(options,"sep=",4) == 0) {
 795                 if(options[4] != 0) {
 796                         separator[0] = options[4];
 797                         options += 5;
 798                 } else {
 799                         cFYI(1,("Null separator not allowed"));
 800                 }
 801         }
 802
 803         while ((data = strsep(&options, separator)) != NULL) {
 804                 if (!*data)
 805                         continue;
 806                 if ((value = strchr(data, '=')) != NULL)
 807                         *value++ = '\0';
 808
 809                 if (strnicmp(data, "user_xattr",10) == 0) {/*parse before user*/
 810                         vol->no_xattr = 0;
 811                 } else if (strnicmp(data, "nouser_xattr",12) == 0) {
 812                         vol->no_xattr = 1;
 813                 } else if (strnicmp(data, "user", 4) == 0) {
 814                         if (!value || !*value) {
 815                                 printk(KERN_WARNING
 816                                        "CIFS: invalid or missing username\n");
 817                                 return 1;       /* needs_arg; */
 818                         }
 819                         if (strnlen(value, 200) < 200) {
 820                                 vol->username = value;
 821                         } else {
 822                                 printk(KERN_WARNING "CIFS: username too long\n");
 823                                 return 1;
 824                         }
 825                 } else if (strnicmp(data, "pass", 4) == 0) {
 826                         if (!value) {
 827                                 vol->password = NULL;
 828                                 continue;
 829                         } else if(value[0] == 0) {
 830                                 /* check if string begins with double comma
 831                                    since that would mean the password really
 832                                    does start with a comma, and would not
 833                                    indicate an empty string */
 834                                 if(value[1] != separator[0]) {
 835                                         vol->password = NULL;
 836                                         continue;
 837                                 }
 838                         }
 839                         temp_len = strlen(value);
 840                         /* removed password length check, NTLM passwords
 841                                 can be arbitrarily long */
 842
 843                         /* if comma in password, the string will be
 844                         prematurely null terminated.  Commas in password are
 845                         specified across the cifs mount interface by a double
 846                         comma ie ,, and a comma used as in other cases ie ','
 847                         as a parameter delimiter/separator is single and due
 848                         to the strsep above is temporarily zeroed. */
 849
 850                         /* NB: password legally can have multiple commas and
 851                         the only illegal character in a password is null */
 852
 853                         if ((value[temp_len] == 0) &&
 854                             (value[temp_len+1] == separator[0])) {
 855                                 /* reinsert comma */
 856                                 value[temp_len] = separator[0];
 857                                 temp_len+=2;  /* move after the second comma */
 858                                 while(value[temp_len] != 0)  {
 859                                         if (value[temp_len] == separator[0]) {
 860                                                 if (value[temp_len+1] ==
 861                                                      separator[0]) {
 862                                                 /* skip second comma */
 863                                                         temp_len++;
 864                                                 } else {
 865                                                 /* single comma indicating start
 866                                                          of next parm */
 867                                                         break;
 868                                                 }
 869                                         }
 870                                         temp_len++;
 871                                 }
 872                                 if(value[temp_len] == 0) {
 873                                         options = NULL;
 874                                 } else {
 875                                         value[temp_len] = 0;
 876                                         /* point option to start of next parm */
 877                                         options = value + temp_len + 1;
 878                                 }
 879                                 /* go from value to value + temp_len condensing
 880                                 double commas to singles. Note that this ends up
 881                                 allocating a few bytes too many, which is ok */
 882                                 vol->password = kzalloc(temp_len, GFP_KERNEL);
 883                                 if(vol->password == NULL) {
 884                                         printk("CIFS: no memory for pass\n");
 885                                         return 1;
 886                                 }
 887                                 for(i=0,j=0;i<temp_len;i++,j++) {
 888                                         vol->password[j] = value[i];
 889                                         if(value[i] == separator[0]
 890                                                 && value[i+1] == separator[0]) {
 891                                                 /* skip second comma */
 892                                                 i++;
 893                                         }
 894                                 }
 895                                 vol->password[j] = 0;
 896                         } else {
 897                                 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
 898                                 if(vol->password == NULL) {
 899                                         printk("CIFS: no memory for pass\n");
 900                                         return 1;
 901                                 }
 902                                 strcpy(vol->password, value);
 903                         }
 904                 } else if (strnicmp(data, "ip", 2) == 0) {
 905                         if (!value || !*value) {
 906                                 vol->UNCip = NULL;
 907                         } else if (strnlen(value, 35) < 35) {
 908                                 vol->UNCip = value;
 909                         } else {
 910                                 printk(KERN_WARNING "CIFS: ip address too long\n");
 911                                 return 1;
 912                         }
 913                 } else if (strnicmp(data, "sec", 3) == 0) {
 914                         if (!value || !*value) {
 915                                 cERROR(1,("no security value specified"));
 916                                 continue;
 917                         } else if (strnicmp(value, "krb5i", 5) == 0) {
 918                                 vol->sign = 1;
 919                                 vol->krb5 = 1;
 920                         } else if (strnicmp(value, "krb5p", 5) == 0) {
 921                                 /* vol->seal = 1;
 922                                    vol->krb5 = 1; */
 923                                 cERROR(1,("Krb5 cifs privacy not supported"));
 924                                 return 1;
 925                         } else if (strnicmp(value, "krb5", 4) == 0) {
 926                                 vol->krb5 = 1;
 927                         } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
 928                                 vol->ntlmv2 = 1;
 929                                 vol->sign = 1;
 930                         } else if (strnicmp(value, "ntlmv2", 6) == 0) {
 931                                 vol->ntlmv2 = 1;
 932                         } else if (strnicmp(value, "ntlmi", 5) == 0) {
 933                                 vol->ntlm = 1;
 934                                 vol->sign = 1;
 935                         } else if (strnicmp(value, "ntlm", 4) == 0) {
 936                                 /* ntlm is default so can be turned off too */
 937                                 vol->ntlm = 1;
 938                         } else if (strnicmp(value, "nontlm", 6) == 0) {
 939                                 vol->ntlm = 0;
 940                         } else if (strnicmp(value, "none", 4) == 0) {
 941                                 vol->nullauth = 1;
 942                         } else {
 943                                 cERROR(1,("bad security option: %s", value));
 944                                 return 1;
 945                         }
 946                 } else if ((strnicmp(data, "unc", 3) == 0)
 947                            || (strnicmp(data, "target", 6) == 0)
 948                            || (strnicmp(data, "path", 4) == 0)) {
 949                         if (!value || !*value) {
 950                                 printk(KERN_WARNING
 951                                        "CIFS: invalid path to network resource\n");
 952                                 return 1;       /* needs_arg; */
 953                         }
 954                         if ((temp_len = strnlen(value, 300)) < 300) {
 955                                 vol->UNC = kmalloc(temp_len+1,GFP_KERNEL);
 956                                 if(vol->UNC == NULL)
 957                                         return 1;
 958                                 strcpy(vol->UNC,value);
 959                                 if (strncmp(vol->UNC, "//", 2) == 0) {
 960                                         vol->UNC[0] = '\\';
 961                                         vol->UNC[1] = '\\';
 962                                 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
 963                                         printk(KERN_WARNING
 964                                                "CIFS: UNC Path does not begin with // or \\\\ \n");
 965                                         return 1;
 966                                 }
 967                         } else {
 968                                 printk(KERN_WARNING "CIFS: UNC name too long\n");
 969                                 return 1;
 970                         }
 971                 } else if ((strnicmp(data, "domain", 3) == 0)
 972                            || (strnicmp(data, "workgroup", 5) == 0)) {
 973                         if (!value || !*value) {
 974                                 printk(KERN_WARNING "CIFS: invalid domain name\n");
 975                                 return 1;       /* needs_arg; */
 976                         }
 977                         /* BB are there cases in which a comma can be valid in
 978                         a domain name and need special handling? */
 979                         if (strnlen(value, 65) < 65) {
 980                                 vol->domainname = value;
 981                                 cFYI(1, ("Domain name set"));
 982                         } else {
 983                                 printk(KERN_WARNING "CIFS: domain name too long\n");
 984                                 return 1;
 985                         }
 986                 } else if (strnicmp(data, "iocharset", 9) == 0) {
 987                         if (!value || !*value) {
 988                                 printk(KERN_WARNING "CIFS: invalid iocharset specified\n");
 989                                 return 1;       /* needs_arg; */
 990                         }
 991                         if (strnlen(value, 65) < 65) {
 992                                 if(strnicmp(value,"default",7))
 993                                         vol->iocharset = value;
 994                                 /* if iocharset not set load_nls_default used by caller */
 995                                 cFYI(1, ("iocharset set to %s",value));
 996                         } else {
 997                                 printk(KERN_WARNING "CIFS: iocharset name too long.\n");
 998                                 return 1;
 999                         }
1000                 } else if (strnicmp(data, "uid", 3) == 0) {
1001                         if (value && *value) {
1002                                 vol->linux_uid =
1003                                         simple_strtoul(value, &value, 0);
1004                         }
1005                 } else if (strnicmp(data, "gid", 3) == 0) {
1006                         if (value && *value) {
1007                                 vol->linux_gid =
1008                                         simple_strtoul(value, &value, 0);
1009                         }
1010                 } else if (strnicmp(data, "file_mode", 4) == 0) {
1011                         if (value && *value) {
1012                                 vol->file_mode =
1013                                         simple_strtoul(value, &value, 0);
1014                         }
1015                 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1016                         if (value && *value) {
1017                                 vol->dir_mode =
1018                                         simple_strtoul(value, &value, 0);
1019                         }
1020                 } else if (strnicmp(data, "dirmode", 4) == 0) {
1021                         if (value && *value) {
1022                                 vol->dir_mode =
1023                                         simple_strtoul(value, &value, 0);
1024                         }
1025                 } else if (strnicmp(data, "port", 4) == 0) {
1026                         if (value && *value) {
1027                                 vol->port =
1028                                         simple_strtoul(value, &value, 0);
1029                         }
1030                 } else if (strnicmp(data, "rsize", 5) == 0) {
1031                         if (value && *value) {
1032                                 vol->rsize =
1033                                         simple_strtoul(value, &value, 0);
1034                         }
1035                 } else if (strnicmp(data, "wsize", 5) == 0) {
1036                         if (value && *value) {
1037                                 vol->wsize =
1038                                         simple_strtoul(value, &value, 0);
1039                         }
1040                 } else if (strnicmp(data, "sockopt", 5) == 0) {
1041                         if (value && *value) {
1042                                 vol->sockopt =
1043                                         simple_strtoul(value, &value, 0);
1044                         }
1045                 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1046                         if (!value || !*value || (*value == ' ')) {
1047                                 cFYI(1,("invalid (empty) netbiosname specified"));
1048                         } else {
1049                                 memset(vol->source_rfc1001_name,0x20,15);
1050                                 for(i=0;i<15;i++) {
1051                                 /* BB are there cases in which a comma can be
1052                                 valid in this workstation netbios name (and need
1053                                 special handling)? */
1054
1055                                 /* We do not uppercase netbiosname for user */
1056                                         if (value[i]==0)
1057                                                 break;
1058                                         else
1059                                                 vol->source_rfc1001_name[i] = value[i];
1060                                 }
1061                                 /* The string has 16th byte zero still from
1062                                 set at top of the function  */
1063                                 if((i==15) && (value[i] != 0))
1064                                         printk(KERN_WARNING "CIFS: netbiosname longer than 15 truncated.\n");
1065                         }
1066                 } else if (strnicmp(data, "servern", 7) == 0) {
1067                         /* servernetbiosname specified override *SMBSERVER */
1068                         if (!value || !*value || (*value == ' ')) {
1069                                 cFYI(1,("empty server netbiosname specified"));
1070                         } else {
1071                                 /* last byte, type, is 0x20 for servr type */
1072                                 memset(vol->target_rfc1001_name,0x20,16);
1073
1074                                 for(i=0;i<15;i++) {
1075                                 /* BB are there cases in which a comma can be
1076                                    valid in this workstation netbios name (and need
1077                                    special handling)? */
1078
1079                                 /* user or mount helper must uppercase netbiosname */
1080                                         if (value[i]==0)
1081                                                 break;
1082                                         else
1083                                                 vol->target_rfc1001_name[i] = value[i];
1084                                 }
1085                                 /* The string has 16th byte zero still from
1086                                    set at top of the function  */
1087                                 if((i==15) && (value[i] != 0))
1088                                         printk(KERN_WARNING "CIFS: server netbiosname longer than 15 truncated.\n");
1089                         }
1090                 } else if (strnicmp(data, "credentials", 4) == 0) {
1091                         /* ignore */
1092                 } else if (strnicmp(data, "version", 3) == 0) {
1093                         /* ignore */
1094                 } else if (strnicmp(data, "guest",5) == 0) {
1095                         /* ignore */
1096                 } else if (strnicmp(data, "rw", 2) == 0) {
1097                         vol->rw = TRUE;
1098                 } else if ((strnicmp(data, "suid", 4) == 0) ||
1099                                    (strnicmp(data, "nosuid", 6) == 0) ||
1100                                    (strnicmp(data, "exec", 4) == 0) ||
1101                                    (strnicmp(data, "noexec", 6) == 0) ||
1102                                    (strnicmp(data, "nodev", 5) == 0) ||
1103                                    (strnicmp(data, "noauto", 6) == 0) ||
1104                                    (strnicmp(data, "dev", 3) == 0)) {
1105                         /*  The mount tool or mount.cifs helper (if present)
1106                                 uses these opts to set flags, and the flags are read
1107                                 by the kernel vfs layer before we get here (ie
1108                                 before read super) so there is no point trying to
1109                                 parse these options again and set anything and it
1110                                 is ok to just ignore them */
1111                         continue;
1112                 } else if (strnicmp(data, "ro", 2) == 0) {
1113                         vol->rw = FALSE;
1114                 } else if (strnicmp(data, "hard", 4) == 0) {
1115                         vol->retry = 1;
1116                 } else if (strnicmp(data, "soft", 4) == 0) {
1117                         vol->retry = 0;
1118                 } else if (strnicmp(data, "perm", 4) == 0) {
1119                         vol->noperm = 0;
1120                 } else if (strnicmp(data, "noperm", 6) == 0) {
1121                         vol->noperm = 1;
1122                 } else if (strnicmp(data, "mapchars", 8) == 0) {
1123                         vol->remap = 1;
1124                 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1125                         vol->remap = 0;
1126                 } else if (strnicmp(data, "sfu", 3) == 0) {
1127                         vol->sfu_emul = 1;
1128                 } else if (strnicmp(data, "nosfu", 5) == 0) {
1129                         vol->sfu_emul = 0;
1130                 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1131                         vol->posix_paths = 1;
1132                 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1133                         vol->posix_paths = 0;
1134                 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1135                            (strnicmp(data, "ignorecase", 10)  == 0)) {
1136                         vol->nocase = 1;
1137                 } else if (strnicmp(data, "brl", 3) == 0) {
1138                         vol->nobrl =  0;
1139                 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1140                            (strnicmp(data, "nolock", 6) == 0)) {
1141                         vol->nobrl =  1;
1142                         /* turn off mandatory locking in mode
1143                         if remote locking is turned off since the
1144                         local vfs will do advisory */
1145                         if(vol->file_mode == (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1146                                 vol->file_mode = S_IALLUGO;
1147                 } else if (strnicmp(data, "setuids", 7) == 0) {
1148                         vol->setuids = 1;
1149                 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1150                         vol->setuids = 0;
1151                 } else if (strnicmp(data, "nohard", 6) == 0) {
1152                         vol->retry = 0;
1153                 } else if (strnicmp(data, "nosoft", 6) == 0) {
1154                         vol->retry = 1;
1155                 } else if (strnicmp(data, "nointr", 6) == 0) {
1156                         vol->intr = 0;
1157                 } else if (strnicmp(data, "intr", 4) == 0) {
1158                         vol->intr = 1;
1159                 } else if (strnicmp(data, "serverino",7) == 0) {
1160                         vol->server_ino = 1;
1161                 } else if (strnicmp(data, "noserverino",9) == 0) {
1162                         vol->server_ino = 0;
1163                 } else if (strnicmp(data, "cifsacl",7) == 0) {
1164                         vol->cifs_acl = 1;
1165                 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1166                         vol->cifs_acl = 0;
1167                 } else if (strnicmp(data, "acl",3) == 0) {
1168                         vol->no_psx_acl = 0;
1169                 } else if (strnicmp(data, "noacl",5) == 0) {
1170                         vol->no_psx_acl = 1;
1171                 } else if (strnicmp(data, "direct",6) == 0) {
1172                         vol->direct_io = 1;
1173                 } else if (strnicmp(data, "forcedirectio",13) == 0) {
1174                         vol->direct_io = 1;
1175                 } else if (strnicmp(data, "in6_addr",8) == 0) {
1176                         if (!value || !*value) {
1177                                 vol->in6_addr = NULL;
1178                         } else if (strnlen(value, 49) == 48) {
1179                                 vol->in6_addr = value;
1180                         } else {
1181                                 printk(KERN_WARNING "CIFS: ip v6 address not 48 characters long\n");
1182                                 return 1;
1183                         }
1184                 } else if (strnicmp(data, "noac", 4) == 0) {
1185                         printk(KERN_WARNING "CIFS: Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n");
1186                 } else
1187                         printk(KERN_WARNING "CIFS: Unknown mount option %s\n",data);
1188         }
1189         if (vol->UNC == NULL) {
1190                 if(devname == NULL) {
1191                         printk(KERN_WARNING "CIFS: Missing UNC name for mount target\n");
1192                         return 1;
1193                 }
1194                 if ((temp_len = strnlen(devname, 300)) < 300) {
1195                         vol->UNC = kmalloc(temp_len+1,GFP_KERNEL);
1196                         if(vol->UNC == NULL)
1197                                 return 1;
1198                         strcpy(vol->UNC,devname);
1199                         if (strncmp(vol->UNC, "//", 2) == 0) {
1200                                 vol->UNC[0] = '\\';
1201                                 vol->UNC[1] = '\\';
1202                         } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1203                                 printk(KERN_WARNING "CIFS: UNC Path does not begin with // or \\\\ \n");
1204                                 return 1;
1205                         }
1206                 } else {
1207                         printk(KERN_WARNING "CIFS: UNC name too long\n");
1208                         return 1;
1209                 }
1210         }
1211         if(vol->UNCip == NULL)
1212                 vol->UNCip = &vol->UNC[2];
1213
1214         return 0;
1215 }
1216
1217 static struct cifsSesInfo *
1218 cifs_find_tcp_session(struct in_addr * target_ip_addr,
1219                 struct in6_addr *target_ip6_addr,
1220                  char *userName, struct TCP_Server_Info **psrvTcp)
1221 {
1222         struct list_head *tmp;
1223         struct cifsSesInfo *ses;
1224         *psrvTcp = NULL;
1225         read_lock(&GlobalSMBSeslock);
1226
1227         list_for_each(tmp, &GlobalSMBSessionList) {
1228                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
1229                 if (ses->server) {
1230                         if((target_ip_addr &&
1231                                 (ses->server->addr.sockAddr.sin_addr.s_addr
1232                                   == target_ip_addr->s_addr)) || (target_ip6_addr
1233                                 && memcmp(&ses->server->addr.sockAddr6.sin6_addr,
1234                                         target_ip6_addr,sizeof(*target_ip6_addr)))){
1235                                 /* BB lock server and tcp session and increment use count here?? */
1236                                 *psrvTcp = ses->server; /* found a match on the TCP session */
1237                                 /* BB check if reconnection needed */
1238                                 if (strncmp
1239                                     (ses->userName, userName,
1240                                      MAX_USERNAME_SIZE) == 0){
1241                                         read_unlock(&GlobalSMBSeslock);
1242                                         return ses;     /* found exact match on both tcp and SMB sessions */
1243                                 }
1244                         }
1245                 }
1246                 /* else tcp and smb sessions need reconnection */
1247         }
1248         read_unlock(&GlobalSMBSeslock);
1249         return NULL;
1250 }
1251
1252 static struct cifsTconInfo *
1253 find_unc(__be32 new_target_ip_addr, char *uncName, char *userName)
1254 {
1255         struct list_head *tmp;
1256         struct cifsTconInfo *tcon;
1257
1258         read_lock(&GlobalSMBSeslock);
1259         list_for_each(tmp, &GlobalTreeConnectionList) {
1260                 cFYI(1, ("Next tcon - "));
1261                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
1262                 if (tcon->ses) {
1263                         if (tcon->ses->server) {
1264                                 cFYI(1,
1265                                      (" old ip addr: %x == new ip %x ?",
1266                                       tcon->ses->server->addr.sockAddr.sin_addr.
1267                                       s_addr, new_target_ip_addr));
1268                                 if (tcon->ses->server->addr.sockAddr.sin_addr.
1269                                     s_addr == new_target_ip_addr) {
1270         /* BB lock tcon and server and tcp session and increment use count here? */
1271                                         /* found a match on the TCP session */
1272                                         /* BB check if reconnection needed */
1273                                         cFYI(1,("Matched ip, old UNC: %s == new: %s ?",
1274                                               tcon->treeName, uncName));
1275                                         if (strncmp
1276                                             (tcon->treeName, uncName,
1277                                              MAX_TREE_SIZE) == 0) {
1278                                                 cFYI(1,
1279                                                      ("Matched UNC, old user: %s == new: %s ?",
1280                                                       tcon->treeName, uncName));
1281                                                 if (strncmp
1282                                                     (tcon->ses->userName,
1283                                                      userName,
1284                                                      MAX_USERNAME_SIZE) == 0) {
1285                                                         read_unlock(&GlobalSMBSeslock);
1286                                                         return tcon;/* also matched user (smb session)*/
1287                                                 }
1288                                         }
1289                                 }
1290                         }
1291                 }
1292         }
1293         read_unlock(&GlobalSMBSeslock);
1294         return NULL;
1295 }
1296
1297 int
1298 connect_to_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1299                     const char *old_path, const struct nls_table *nls_codepage,
1300                     int remap)
1301 {
1302         unsigned char *referrals = NULL;
1303         unsigned int num_referrals;
1304         int rc = 0;
1305
1306         rc = get_dfs_path(xid, pSesInfo,old_path, nls_codepage,
1307                         &num_referrals, &referrals, remap);
1308
1309         /* BB Add in code to: if valid refrl, if not ip address contact
1310                 the helper that resolves tcp names, mount to it, try to
1311                 tcon to it unmount it if fail */
1312
1313         kfree(referrals);
1314
1315         return rc;
1316 }
1317
1318 int
1319 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1320                         const char *old_path, const struct nls_table *nls_codepage,
1321                         unsigned int *pnum_referrals,
1322                         unsigned char ** preferrals, int remap)
1323 {
1324         char *temp_unc;
1325         int rc = 0;
1326
1327         *pnum_referrals = 0;
1328
1329         if (pSesInfo->ipc_tid == 0) {
1330                 temp_unc = kmalloc(2 /* for slashes */ +
1331                         strnlen(pSesInfo->serverName,SERVER_NAME_LEN_WITH_NULL * 2)
1332                                  + 1 + 4 /* slash IPC$ */  + 2,
1333                                 GFP_KERNEL);
1334                 if (temp_unc == NULL)
1335                         return -ENOMEM;
1336                 temp_unc[0] = '\\';
1337                 temp_unc[1] = '\\';
1338                 strcpy(temp_unc + 2, pSesInfo->serverName);
1339                 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1340                 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1341                 cFYI(1,
1342                      ("CIFS Tcon rc = %d ipc_tid = %d", rc,pSesInfo->ipc_tid));
1343                 kfree(temp_unc);
1344         }
1345         if (rc == 0)
1346                 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1347                                      pnum_referrals, nls_codepage, remap);
1348
1349         return rc;
1350 }
1351
1352 /* See RFC1001 section 14 on representation of Netbios names */
1353 static void rfc1002mangle(char * target,char * source, unsigned int length)
1354 {
1355         unsigned int i,j;
1356
1357         for(i=0,j=0;i<(length);i++) {
1358                 /* mask a nibble at a time and encode */
1359                 target[j] = 'A' + (0x0F & (source[i] >> 4));
1360                 target[j+1] = 'A' + (0x0F & source[i]);
1361                 j+=2;
1362         }
1363
1364 }
1365
1366
1367 static int
1368 ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
1369              char * netbios_name, char * target_name)
1370 {
1371         int rc = 0;
1372         int connected = 0;
1373         __be16 orig_port = 0;
1374
1375         if(*csocket == NULL) {
1376                 rc = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, csocket);
1377                 if (rc < 0) {
1378                         cERROR(1, ("Error %d creating socket",rc));
1379                         *csocket = NULL;
1380                         return rc;
1381                 } else {
1382                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1383                         cFYI(1,("Socket created"));
1384                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1385                 }
1386         }
1387
1388         psin_server->sin_family = AF_INET;
1389         if(psin_server->sin_port) { /* user overrode default port */
1390                 rc = (*csocket)->ops->connect(*csocket,
1391                                 (struct sockaddr *) psin_server,
1392                                 sizeof (struct sockaddr_in),0);
1393                 if (rc >= 0)
1394                         connected = 1;
1395         }
1396
1397         if(!connected) {
1398                 /* save original port so we can retry user specified port
1399                         later if fall back ports fail this time  */
1400                 orig_port = psin_server->sin_port;
1401
1402                 /* do not retry on the same port we just failed on */
1403                 if(psin_server->sin_port != htons(CIFS_PORT)) {
1404                         psin_server->sin_port = htons(CIFS_PORT);
1405
1406                         rc = (*csocket)->ops->connect(*csocket,
1407                                         (struct sockaddr *) psin_server,
1408                                         sizeof (struct sockaddr_in),0);
1409                         if (rc >= 0)
1410                                 connected = 1;
1411                 }
1412         }
1413         if (!connected) {
1414                 psin_server->sin_port = htons(RFC1001_PORT);
1415                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1416                                               psin_server, sizeof (struct sockaddr_in),0);
1417                 if (rc >= 0)
1418                         connected = 1;
1419         }
1420
1421         /* give up here - unless we want to retry on different
1422                 protocol families some day */
1423         if (!connected) {
1424                 if(orig_port)
1425                         psin_server->sin_port = orig_port;
1426                 cFYI(1,("Error %d connecting to server via ipv4",rc));
1427                 sock_release(*csocket);
1428                 *csocket = NULL;
1429                 return rc;
1430         }
1431         /* Eventually check for other socket options to change from
1432                 the default. sock_setsockopt not used because it expects
1433                 user space buffer */
1434          cFYI(1,("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",(*csocket)->sk->sk_sndbuf,
1435                  (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
1436         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1437         /* make the bufsizes depend on wsize/rsize and max requests */
1438         if((*csocket)->sk->sk_sndbuf < (200 * 1024))
1439                 (*csocket)->sk->sk_sndbuf = 200 * 1024;
1440         if((*csocket)->sk->sk_rcvbuf < (140 * 1024))
1441                 (*csocket)->sk->sk_rcvbuf = 140 * 1024;
1442
1443         /* send RFC1001 sessinit */
1444         if(psin_server->sin_port == htons(RFC1001_PORT)) {
1445                 /* some servers require RFC1001 sessinit before sending
1446                 negprot - BB check reconnection in case where second
1447                 sessinit is sent but no second negprot */
1448                 struct rfc1002_session_packet * ses_init_buf;
1449                 struct smb_hdr * smb_buf;
1450                 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), GFP_KERNEL);
1451                 if(ses_init_buf) {
1452                         ses_init_buf->trailer.session_req.called_len = 32;
1453                         if(target_name && (target_name[0] != 0)) {
1454                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1455                                         target_name, 16);
1456                         } else {
1457                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1458                                         DEFAULT_CIFS_CALLED_NAME,16);
1459                         }
1460
1461                         ses_init_buf->trailer.session_req.calling_len = 32;
1462                         /* calling name ends in null (byte 16) from old smb
1463                         convention. */
1464                         if(netbios_name && (netbios_name[0] !=0)) {
1465                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1466                                         netbios_name,16);
1467                         } else {
1468                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1469                                         "LINUX_CIFS_CLNT",16);
1470                         }
1471                         ses_init_buf->trailer.session_req.scope1 = 0;
1472                         ses_init_buf->trailer.session_req.scope2 = 0;
1473                         smb_buf = (struct smb_hdr *)ses_init_buf;
1474                         /* sizeof RFC1002_SESSION_REQUEST with no scope */
1475                         smb_buf->smb_buf_length = 0x81000044;
1476                         rc = smb_send(*csocket, smb_buf, 0x44,
1477                                 (struct sockaddr *)psin_server);
1478                         kfree(ses_init_buf);
1479                 }
1480                 /* else the negprot may still work without this
1481                 even though malloc failed */
1482
1483         }
1484
1485         return rc;
1486 }
1487
1488 static int
1489 ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
1490 {
1491         int rc = 0;
1492         int connected = 0;
1493         __be16 orig_port = 0;
1494
1495         if(*csocket == NULL) {
1496                 rc = sock_create_kern(PF_INET6, SOCK_STREAM, IPPROTO_TCP, csocket);
1497                 if (rc < 0) {
1498                         cERROR(1, ("Error %d creating ipv6 socket",rc));
1499                         *csocket = NULL;
1500                         return rc;
1501                 } else {
1502                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1503                          cFYI(1,("ipv6 Socket created"));
1504                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1505                 }
1506         }
1507
1508         psin_server->sin6_family = AF_INET6;
1509
1510         if(psin_server->sin6_port) { /* user overrode default port */
1511                 rc = (*csocket)->ops->connect(*csocket,
1512                                 (struct sockaddr *) psin_server,
1513                                 sizeof (struct sockaddr_in6),0);
1514                 if (rc >= 0)
1515                         connected = 1;
1516         }
1517
1518         if(!connected) {
1519                 /* save original port so we can retry user specified port
1520                         later if fall back ports fail this time  */
1521
1522                 orig_port = psin_server->sin6_port;
1523                 /* do not retry on the same port we just failed on */
1524                 if(psin_server->sin6_port != htons(CIFS_PORT)) {
1525                         psin_server->sin6_port = htons(CIFS_PORT);
1526
1527                         rc = (*csocket)->ops->connect(*csocket,
1528                                         (struct sockaddr *) psin_server,
1529                                         sizeof (struct sockaddr_in6),0);
1530                         if (rc >= 0)
1531                                 connected = 1;
1532                 }
1533         }
1534         if (!connected) {
1535                 psin_server->sin6_port = htons(RFC1001_PORT);
1536                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1537                                          psin_server, sizeof (struct sockaddr_in6),0);
1538                 if (rc >= 0)
1539                         connected = 1;
1540         }
1541
1542         /* give up here - unless we want to retry on different
1543                 protocol families some day */
1544         if (!connected) {
1545                 if(orig_port)
1546                         psin_server->sin6_port = orig_port;
1547                 cFYI(1,("Error %d connecting to server via ipv6",rc));
1548                 sock_release(*csocket);
1549                 *csocket = NULL;
1550                 return rc;
1551         }
1552         /* Eventually check for other socket options to change from
1553                 the default. sock_setsockopt not used because it expects
1554                 user space buffer */
1555         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1556
1557         return rc;
1558 }
1559
1560 int
1561 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
1562            char *mount_data, const char *devname)
1563 {
1564         int rc = 0;
1565         int xid;
1566         int address_type = AF_INET;
1567         struct socket *csocket = NULL;
1568         struct sockaddr_in sin_server;
1569         struct sockaddr_in6 sin_server6;
1570         struct smb_vol volume_info;
1571         struct cifsSesInfo *pSesInfo = NULL;
1572         struct cifsSesInfo *existingCifsSes = NULL;
1573         struct cifsTconInfo *tcon = NULL;
1574         struct TCP_Server_Info *srvTcp = NULL;
1575
1576         xid = GetXid();
1577
1578 /* cFYI(1, ("Entering cifs_mount. Xid: %d with: %s", xid, mount_data)); */
1579
1580         memset(&volume_info,0,sizeof(struct smb_vol));
1581         if (cifs_parse_mount_options(mount_data, devname, &volume_info)) {
1582                 kfree(volume_info.UNC);
1583                 kfree(volume_info.password);
1584                 FreeXid(xid);
1585                 return -EINVAL;
1586         }
1587
1588         if (volume_info.username) {
1589                 /* BB fixme parse for domain name here */
1590                 cFYI(1, ("Username: %s ", volume_info.username));
1591
1592         } else {
1593                 cifserror("No username specified");
1594         /* In userspace mount helper we can get user name from alternate
1595            locations such as env variables and files on disk */
1596                 kfree(volume_info.UNC);
1597                 kfree(volume_info.password);
1598                 FreeXid(xid);
1599                 return -EINVAL;
1600         }
1601
1602         if (volume_info.UNCip && volume_info.UNC) {
1603                 rc = cifs_inet_pton(AF_INET, volume_info.UNCip,&sin_server.sin_addr.s_addr);
1604
1605                 if(rc <= 0) {
1606                         /* not ipv4 address, try ipv6 */
1607                         rc = cifs_inet_pton(AF_INET6,volume_info.UNCip,&sin_server6.sin6_addr.in6_u);
1608                         if(rc > 0)
1609                                 address_type = AF_INET6;
1610                 } else {
1611                         address_type = AF_INET;
1612                 }
1613
1614                 if(rc <= 0) {
1615                         /* we failed translating address */
1616                         kfree(volume_info.UNC);
1617                         kfree(volume_info.password);
1618                         FreeXid(xid);
1619                         return -EINVAL;
1620                 }
1621
1622                 cFYI(1, ("UNC: %s ip: %s", volume_info.UNC, volume_info.UNCip));
1623                 /* success */
1624                 rc = 0;
1625         } else if (volume_info.UNCip){
1626                 /* BB using ip addr as server name connect to the DFS root below */
1627                 cERROR(1,("Connecting to DFS root not implemented yet"));
1628                 kfree(volume_info.UNC);
1629                 kfree(volume_info.password);
1630                 FreeXid(xid);
1631                 return -EINVAL;
1632         } else /* which servers DFS root would we conect to */ {
1633                 cERROR(1,
1634                        ("CIFS mount error: No UNC path (e.g. -o unc=//192.168.1.100/public) specified"));
1635                 kfree(volume_info.UNC);
1636                 kfree(volume_info.password);
1637                 FreeXid(xid);
1638                 return -EINVAL;
1639         }
1640
1641         /* this is needed for ASCII cp to Unicode converts */
1642         if(volume_info.iocharset == NULL) {
1643                 cifs_sb->local_nls = load_nls_default();
1644         /* load_nls_default can not return null */
1645         } else {
1646                 cifs_sb->local_nls = load_nls(volume_info.iocharset);
1647                 if(cifs_sb->local_nls == NULL) {
1648                         cERROR(1,("CIFS mount error: iocharset %s not found",volume_info.iocharset));
1649                         kfree(volume_info.UNC);
1650                         kfree(volume_info.password);
1651                         FreeXid(xid);
1652                         return -ELIBACC;
1653                 }
1654         }
1655
1656         if(address_type == AF_INET)
1657                 existingCifsSes = cifs_find_tcp_session(&sin_server.sin_addr,
1658                         NULL /* no ipv6 addr */,
1659                         volume_info.username, &srvTcp);
1660         else if(address_type == AF_INET6)
1661                 existingCifsSes = cifs_find_tcp_session(NULL /* no ipv4 addr */,
1662                         &sin_server6.sin6_addr,
1663                         volume_info.username, &srvTcp);
1664         else {
1665                 kfree(volume_info.UNC);
1666                 kfree(volume_info.password);
1667                 FreeXid(xid);
1668                 return -EINVAL;
1669         }
1670
1671
1672         if (srvTcp) {
1673                 cFYI(1, ("Existing tcp session with server found"));
1674         } else {        /* create socket */
1675                 if(volume_info.port)
1676                         sin_server.sin_port = htons(volume_info.port);
1677                 else
1678                         sin_server.sin_port = 0;
1679                 rc = ipv4_connect(&sin_server,&csocket,
1680                                   volume_info.source_rfc1001_name,
1681                                   volume_info.target_rfc1001_name);
1682                 if (rc < 0) {
1683                         cERROR(1,
1684                                ("Error connecting to IPv4 socket. Aborting operation"));
1685                         if(csocket != NULL)
1686                                 sock_release(csocket);
1687                         kfree(volume_info.UNC);
1688                         kfree(volume_info.password);
1689                         FreeXid(xid);
1690                         return rc;
1691                 }
1692
1693                 srvTcp = kmalloc(sizeof (struct TCP_Server_Info), GFP_KERNEL);
1694                 if (srvTcp == NULL) {
1695                         rc = -ENOMEM;
1696                         sock_release(csocket);
1697                         kfree(volume_info.UNC);
1698                         kfree(volume_info.password);
1699                         FreeXid(xid);
1700                         return rc;
1701                 } else {
1702                         memset(srvTcp, 0, sizeof (struct TCP_Server_Info));
1703                         memcpy(&srvTcp->addr.sockAddr, &sin_server, sizeof (struct sockaddr_in));
1704                         atomic_set(&srvTcp->inFlight,0);
1705                         /* BB Add code for ipv6 case too */
1706                         srvTcp->ssocket = csocket;
1707                         srvTcp->protocolType = IPV4;
1708                         init_waitqueue_head(&srvTcp->response_q);
1709                         init_waitqueue_head(&srvTcp->request_q);
1710                         INIT_LIST_HEAD(&srvTcp->pending_mid_q);
1711                         /* at this point we are the only ones with the pointer
1712                         to the struct since the kernel thread not created yet
1713                         so no need to spinlock this init of tcpStatus */
1714                         srvTcp->tcpStatus = CifsNew;
1715                         init_MUTEX(&srvTcp->tcpSem);
1716                         rc = (int)kernel_thread((void *)(void *)cifs_demultiplex_thread, srvTcp,
1717                                       CLONE_FS | CLONE_FILES | CLONE_VM);
1718                         if(rc < 0) {
1719                                 rc = -ENOMEM;
1720                                 sock_release(csocket);
1721                                 kfree(volume_info.UNC);
1722                                 kfree(volume_info.password);
1723                                 FreeXid(xid);
1724                                 return rc;
1725                         }
1726                         wait_for_completion(&cifsd_complete);
1727                         rc = 0;
1728                         memcpy(srvTcp->workstation_RFC1001_name, volume_info.source_rfc1001_name,16);
1729                         memcpy(srvTcp->server_RFC1001_name, volume_info.target_rfc1001_name,16);
1730                         srvTcp->sequence_number = 0;
1731                 }
1732         }
1733
1734         if (existingCifsSes) {
1735                 pSesInfo = existingCifsSes;
1736                 cFYI(1, ("Existing smb sess found"));
1737                 kfree(volume_info.password);
1738                 /* volume_info.UNC freed at end of function */
1739         } else if (!rc) {
1740                 cFYI(1, ("Existing smb sess not found"));
1741                 pSesInfo = sesInfoAlloc();
1742                 if (pSesInfo == NULL)
1743                         rc = -ENOMEM;
1744                 else {
1745                         pSesInfo->server = srvTcp;
1746                         sprintf(pSesInfo->serverName, "%u.%u.%u.%u",
1747                                 NIPQUAD(sin_server.sin_addr.s_addr));
1748                 }
1749
1750                 if (!rc){
1751                         /* volume_info.password freed at unmount */
1752                         if (volume_info.password)
1753                                 pSesInfo->password = volume_info.password;
1754                         if (volume_info.username)
1755                                 strncpy(pSesInfo->userName,
1756                                         volume_info.username,MAX_USERNAME_SIZE);
1757                         if (volume_info.domainname)
1758                                 strncpy(pSesInfo->domainName,
1759                                         volume_info.domainname,MAX_USERNAME_SIZE);
1760                         pSesInfo->linux_uid = volume_info.linux_uid;
1761                         down(&pSesInfo->sesSem);
1762                         rc = cifs_setup_session(xid,pSesInfo, cifs_sb->local_nls);
1763                         up(&pSesInfo->sesSem);
1764                         if(!rc)
1765                                 atomic_inc(&srvTcp->socketUseCount);
1766                 } else
1767                         kfree(volume_info.password);
1768         }
1769
1770         /* search for existing tcon to this server share */
1771         if (!rc) {
1772                 if(volume_info.rsize > CIFSMaxBufSize) {
1773                         cERROR(1,("rsize %d too large, using MaxBufSize",
1774                                 volume_info.rsize));
1775                         cifs_sb->rsize = CIFSMaxBufSize;
1776                 } else if((volume_info.rsize) && (volume_info.rsize <= CIFSMaxBufSize))
1777                         cifs_sb->rsize = volume_info.rsize;
1778                 else /* default */
1779                         cifs_sb->rsize = CIFSMaxBufSize;
1780
1781                 if(volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
1782                         cERROR(1,("wsize %d too large using 4096 instead",
1783                                   volume_info.wsize));
1784                         cifs_sb->wsize = 4096;
1785                 } else if(volume_info.wsize)
1786                         cifs_sb->wsize = volume_info.wsize;
1787                 else
1788                         cifs_sb->wsize =
1789                                 min_t(const int, PAGEVEC_SIZE * PAGE_CACHE_SIZE,
1790                                         127*1024);
1791                         /* old default of CIFSMaxBufSize was too small now
1792                            that SMB Write2 can send multiple pages in kvec.
1793                            RFC1001 does not describe what happens when frame
1794                            bigger than 128K is sent so use that as max in
1795                            conjunction with 52K kvec constraint on arch with 4K
1796                            page size  */
1797
1798                 if(cifs_sb->rsize < 2048) {
1799                         cifs_sb->rsize = 2048;
1800                         /* Windows ME may prefer this */
1801                         cFYI(1,("readsize set to minimum 2048"));
1802                 }
1803                 cifs_sb->mnt_uid = volume_info.linux_uid;
1804                 cifs_sb->mnt_gid = volume_info.linux_gid;
1805                 cifs_sb->mnt_file_mode = volume_info.file_mode;
1806                 cifs_sb->mnt_dir_mode = volume_info.dir_mode;
1807                 cFYI(1,("file mode: 0x%x  dir mode: 0x%x",
1808                         cifs_sb->mnt_file_mode,cifs_sb->mnt_dir_mode));
1809
1810                 if(volume_info.noperm)
1811                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
1812                 if(volume_info.setuids)
1813                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
1814                 if(volume_info.server_ino)
1815                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
1816                 if(volume_info.remap)
1817                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
1818                 if(volume_info.no_xattr)
1819                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
1820                 if(volume_info.sfu_emul)
1821                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
1822                 if(volume_info.nobrl)
1823                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
1824                 if(volume_info.cifs_acl)
1825                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
1826
1827                 if(volume_info.direct_io) {
1828                         cFYI(1,("mounting share using direct i/o"));
1829                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
1830                 }
1831
1832                 tcon =
1833                     find_unc(sin_server.sin_addr.s_addr, volume_info.UNC,
1834                              volume_info.username);
1835                 if (tcon) {
1836                         cFYI(1, ("Found match on UNC path"));
1837                         /* we can have only one retry value for a connection
1838                            to a share so for resources mounted more than once
1839                            to the same server share the last value passed in
1840                            for the retry flag is used */
1841                         tcon->retry = volume_info.retry;
1842                         tcon->nocase = volume_info.nocase;
1843                 } else {
1844                         tcon = tconInfoAlloc();
1845                         if (tcon == NULL)
1846                                 rc = -ENOMEM;
1847                         else {
1848                                 /* check for null share name ie connect to dfs root */
1849
1850                                 /* BB check if this works for exactly length three strings */
1851                                 if ((strchr(volume_info.UNC + 3, '\\') == NULL)
1852                                     && (strchr(volume_info.UNC + 3, '/') ==
1853                                         NULL)) {
1854                                         rc = connect_to_dfs_path(xid, pSesInfo,
1855                                                         "", cifs_sb->local_nls,
1856                                                         cifs_sb->mnt_cifs_flags &
1857                                                           CIFS_MOUNT_MAP_SPECIAL_CHR);
1858                                         kfree(volume_info.UNC);
1859                                         FreeXid(xid);
1860                                         return -ENODEV;
1861                                 } else {
1862                                         rc = CIFSTCon(xid, pSesInfo,
1863                                                 volume_info.UNC,
1864                                                 tcon, cifs_sb->local_nls);
1865                                         cFYI(1, ("CIFS Tcon rc = %d", rc));
1866                                 }
1867                                 if (!rc) {
1868                                         atomic_inc(&pSesInfo->inUse);
1869                                         tcon->retry = volume_info.retry;
1870                                         tcon->nocase = volume_info.nocase;
1871                                 }
1872                         }
1873                 }
1874         }
1875         if(pSesInfo) {
1876                 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
1877                         sb->s_maxbytes = (u64) 1 << 63;
1878                 } else
1879                         sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
1880         }
1881
1882         sb->s_time_gran = 100;
1883
1884 /* on error free sesinfo and tcon struct if needed */
1885         if (rc) {
1886                 /* if session setup failed, use count is zero but
1887                 we still need to free cifsd thread */
1888                 if(atomic_read(&srvTcp->socketUseCount) == 0) {
1889                         spin_lock(&GlobalMid_Lock);
1890                         srvTcp->tcpStatus = CifsExiting;
1891                         spin_unlock(&GlobalMid_Lock);
1892                         if(srvTcp->tsk) {
1893                                 send_sig(SIGKILL,srvTcp->tsk,1);
1894                                 wait_for_completion(&cifsd_complete);
1895                         }
1896                 }
1897                  /* If find_unc succeeded then rc == 0 so we can not end */
1898                 if (tcon)  /* up accidently freeing someone elses tcon struct */
1899                         tconInfoFree(tcon);
1900                 if (existingCifsSes == NULL) {
1901                         if (pSesInfo) {
1902                                 if ((pSesInfo->server) &&
1903                                     (pSesInfo->status == CifsGood)) {
1904                                         int temp_rc;
1905                                         temp_rc = CIFSSMBLogoff(xid, pSesInfo);
1906                                         /* if the socketUseCount is now zero */
1907                                         if((temp_rc == -ESHUTDOWN) &&
1908                                            (pSesInfo->server->tsk)) {
1909                                                 send_sig(SIGKILL,pSesInfo->server->tsk,1);
1910                                                 wait_for_completion(&cifsd_complete);
1911                                         }
1912                                 } else
1913                                         cFYI(1, ("No session or bad tcon"));
1914                                 sesInfoFree(pSesInfo);
1915                                 /* pSesInfo = NULL; */
1916                         }
1917                 }
1918         } else {
1919                 atomic_inc(&tcon->useCount);
1920                 cifs_sb->tcon = tcon;
1921                 tcon->ses = pSesInfo;
1922
1923                 /* do not care if following two calls succeed - informational only */
1924                 CIFSSMBQFSDeviceInfo(xid, tcon);
1925                 CIFSSMBQFSAttributeInfo(xid, tcon);
1926                 if (tcon->ses->capabilities & CAP_UNIX) {
1927                         if(!CIFSSMBQFSUnixInfo(xid, tcon)) {
1928                                 if(!volume_info.no_psx_acl) {
1929                                         if(CIFS_UNIX_POSIX_ACL_CAP &
1930                                            le64_to_cpu(tcon->fsUnixInfo.Capability))
1931                                                 cFYI(1,("server negotiated posix acl support"));
1932                                                 sb->s_flags |= MS_POSIXACL;
1933                                 }
1934
1935                                 /* Try and negotiate POSIX pathnames if we can. */
1936                                 if (volume_info.posix_paths && (CIFS_UNIX_POSIX_PATHNAMES_CAP &
1937                                     le64_to_cpu(tcon->fsUnixInfo.Capability))) {
1938                                         if (!CIFSSMBSetFSUnixInfo(xid, tcon, CIFS_UNIX_POSIX_PATHNAMES_CAP))  {
1939                                                 cFYI(1,("negotiated posix pathnames support"));
1940                                                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_POSIX_PATHS;
1941                                         } else {
1942                                                 cFYI(1,("posix pathnames support requested but not supported"));
1943                                         }
1944                                 }
1945                         }
1946                 }
1947                 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
1948                         cifs_sb->wsize = min(cifs_sb->wsize,
1949                                              (tcon->ses->server->maxBuf -
1950                                               MAX_CIFS_HDR_SIZE));
1951                 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
1952                         cifs_sb->rsize = min(cifs_sb->rsize,
1953                                              (tcon->ses->server->maxBuf -
1954                                               MAX_CIFS_HDR_SIZE));
1955         }
1956
1957         /* volume_info.password is freed above when existing session found
1958         (in which case it is not needed anymore) but when new sesion is created
1959         the password ptr is put in the new session structure (in which case the
1960         password will be freed at unmount time) */
1961         kfree(volume_info.UNC);
1962         FreeXid(xid);
1963         return rc;
1964 }
1965
1966 static int
1967 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
1968               char session_key[CIFS_SESSION_KEY_SIZE],
1969               const struct nls_table *nls_codepage)
1970 {
1971         struct smb_hdr *smb_buffer;
1972         struct smb_hdr *smb_buffer_response;
1973         SESSION_SETUP_ANDX *pSMB;
1974         SESSION_SETUP_ANDX *pSMBr;
1975         char *bcc_ptr;
1976         char *user;
1977         char *domain;
1978         int rc = 0;
1979         int remaining_words = 0;
1980         int bytes_returned = 0;
1981         int len;
1982         __u32 capabilities;
1983         __u16 count;
1984
1985         cFYI(1, ("In sesssetup"));
1986         if(ses == NULL)
1987                 return -EINVAL;
1988         user = ses->userName;
1989         domain = ses->domainName;
1990         smb_buffer = cifs_buf_get();
1991         if (smb_buffer == NULL) {
1992                 return -ENOMEM;
1993         }
1994         smb_buffer_response = smb_buffer;
1995         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
1996
1997         /* send SMBsessionSetup here */
1998         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
1999                         NULL /* no tCon exists yet */ , 13 /* wct */ );
2000
2001         smb_buffer->Mid = GetNextMid(ses->server);
2002         pSMB->req_no_secext.AndXCommand = 0xFF;
2003         pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2004         pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2005
2006         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2007                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2008
2009         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2010                 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2011         if (ses->capabilities & CAP_UNICODE) {
2012                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2013                 capabilities |= CAP_UNICODE;
2014         }
2015         if (ses->capabilities & CAP_STATUS32) {
2016                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2017                 capabilities |= CAP_STATUS32;
2018         }
2019         if (ses->capabilities & CAP_DFS) {
2020                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2021                 capabilities |= CAP_DFS;
2022         }
2023         pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2024
2025         pSMB->req_no_secext.CaseInsensitivePasswordLength =
2026                 cpu_to_le16(CIFS_SESSION_KEY_SIZE);
2027
2028         pSMB->req_no_secext.CaseSensitivePasswordLength =
2029             cpu_to_le16(CIFS_SESSION_KEY_SIZE);
2030         bcc_ptr = pByteArea(smb_buffer);
2031         memcpy(bcc_ptr, (char *) session_key, CIFS_SESSION_KEY_SIZE);
2032         bcc_ptr += CIFS_SESSION_KEY_SIZE;
2033         memcpy(bcc_ptr, (char *) session_key, CIFS_SESSION_KEY_SIZE);
2034         bcc_ptr += CIFS_SESSION_KEY_SIZE;
2035
2036         if (ses->capabilities & CAP_UNICODE) {
2037                 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2038                         *bcc_ptr = 0;
2039                         bcc_ptr++;
2040                 }
2041                 if(user == NULL)
2042                         bytes_returned = 0; /* skill null user */
2043                 else
2044                         bytes_returned =
2045                                 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2046                                         nls_codepage);
2047                 /* convert number of 16 bit words to bytes */
2048                 bcc_ptr += 2 * bytes_returned;
2049                 bcc_ptr += 2;   /* trailing null */
2050                 if (domain == NULL)
2051                         bytes_returned =
2052                             cifs_strtoUCS((__le16 *) bcc_ptr,
2053                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2054                 else
2055                         bytes_returned =
2056                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2057                                           nls_codepage);
2058                 bcc_ptr += 2 * bytes_returned;
2059                 bcc_ptr += 2;
2060                 bytes_returned =
2061                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2062                                   32, nls_codepage);
2063                 bcc_ptr += 2 * bytes_returned;
2064                 bytes_returned =
2065                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release,
2066                                   32, nls_codepage);
2067                 bcc_ptr += 2 * bytes_returned;
2068                 bcc_ptr += 2;
2069                 bytes_returned =
2070                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2071                                   64, nls_codepage);
2072                 bcc_ptr += 2 * bytes_returned;
2073                 bcc_ptr += 2;
2074         } else {
2075                 if(user != NULL) {
2076                     strncpy(bcc_ptr, user, 200);
2077                     bcc_ptr += strnlen(user, 200);
2078                 }
2079                 *bcc_ptr = 0;
2080                 bcc_ptr++;
2081                 if (domain == NULL) {
2082                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2083                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2084                 } else {
2085                         strncpy(bcc_ptr, domain, 64);
2086                         bcc_ptr += strnlen(domain, 64);
2087                         *bcc_ptr = 0;
2088                         bcc_ptr++;
2089                 }
2090                 strcpy(bcc_ptr, "Linux version ");
2091                 bcc_ptr += strlen("Linux version ");
2092                 strcpy(bcc_ptr, system_utsname.release);
2093                 bcc_ptr += strlen(system_utsname.release) + 1;
2094                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2095                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2096         }
2097         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2098         smb_buffer->smb_buf_length += count;
2099         pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2100
2101         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2102                          &bytes_returned, 1);
2103         if (rc) {
2104 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2105         } else if ((smb_buffer_response->WordCount == 3)
2106                    || (smb_buffer_response->WordCount == 4)) {
2107                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2108                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2109                 if (action & GUEST_LOGIN)
2110                         cFYI(1, (" Guest login"));      /* do we want to mark SesInfo struct ? */
2111                 ses->Suid = smb_buffer_response->Uid;   /* UID left in wire format (le) */
2112                 cFYI(1, ("UID = %d ", ses->Suid));
2113          /* response can have either 3 or 4 word count - Samba sends 3 */
2114                 bcc_ptr = pByteArea(smb_buffer_response);
2115                 if ((pSMBr->resp.hdr.WordCount == 3)
2116                     || ((pSMBr->resp.hdr.WordCount == 4)
2117                         && (blob_len < pSMBr->resp.ByteCount))) {
2118                         if (pSMBr->resp.hdr.WordCount == 4)
2119                                 bcc_ptr += blob_len;
2120
2121                         if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2122                                 if ((long) (bcc_ptr) % 2) {
2123                                         remaining_words =
2124                                             (BCC(smb_buffer_response) - 1) /2;
2125                                         bcc_ptr++;      /* Unicode strings must be word aligned */
2126                                 } else {
2127                                         remaining_words =
2128                                                 BCC(smb_buffer_response) / 2;
2129                                 }
2130                                 len =
2131                                     UniStrnlen((wchar_t *) bcc_ptr,
2132                                                remaining_words - 1);
2133 /* We look for obvious messed up bcc or strings in response so we do not go off
2134    the end since (at least) WIN2K and Windows XP have a major bug in not null
2135    terminating last Unicode string in response  */
2136                                 ses->serverOS = kzalloc(2 * (len + 1), GFP_KERNEL);
2137                                 if(ses->serverOS == NULL)
2138                                         goto sesssetup_nomem;
2139                                 cifs_strfromUCS_le(ses->serverOS,
2140                                            (__le16 *)bcc_ptr, len,nls_codepage);
2141                                 bcc_ptr += 2 * (len + 1);
2142                                 remaining_words -= len + 1;
2143                                 ses->serverOS[2 * len] = 0;
2144                                 ses->serverOS[1 + (2 * len)] = 0;
2145                                 if (remaining_words > 0) {
2146                                         len = UniStrnlen((wchar_t *)bcc_ptr,
2147                                                          remaining_words-1);
2148                                         ses->serverNOS = kzalloc(2 * (len + 1),GFP_KERNEL);
2149                                         if(ses->serverNOS == NULL)
2150                                                 goto sesssetup_nomem;
2151                                         cifs_strfromUCS_le(ses->serverNOS,
2152                                                            (__le16 *)bcc_ptr,len,nls_codepage);
2153                                         bcc_ptr += 2 * (len + 1);
2154                                         ses->serverNOS[2 * len] = 0;
2155                                         ses->serverNOS[1 + (2 * len)] = 0;
2156                                         if(strncmp(ses->serverNOS,
2157                                                 "NT LAN Manager 4",16) == 0) {
2158                                                 cFYI(1,("NT4 server"));
2159                                                 ses->flags |= CIFS_SES_NT4;
2160                                         }
2161                                         remaining_words -= len + 1;
2162                                         if (remaining_words > 0) {
2163                                                 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2164           /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2165                                                 ses->serverDomain =
2166                                                     kzalloc(2*(len+1),GFP_KERNEL);
2167                                                 if(ses->serverDomain == NULL)
2168                                                         goto sesssetup_nomem;
2169                                                 cifs_strfromUCS_le(ses->serverDomain,
2170                                                      (__le16 *)bcc_ptr,len,nls_codepage);
2171                                                 bcc_ptr += 2 * (len + 1);
2172                                                 ses->serverDomain[2*len] = 0;
2173                                                 ses->serverDomain[1+(2*len)] = 0;
2174                                         } /* else no more room so create dummy domain string */
2175                                         else
2176                                                 ses->serverDomain =
2177                                                         kzalloc(2, GFP_KERNEL);
2178                                 } else {        /* no room so create dummy domain and NOS string */
2179                                         /* if these kcallocs fail not much we
2180                                            can do, but better to not fail the
2181                                            sesssetup itself */
2182                                         ses->serverDomain =
2183                                             kzalloc(2, GFP_KERNEL);
2184                                         ses->serverNOS =
2185                                             kzalloc(2, GFP_KERNEL);
2186                                 }
2187                         } else {        /* ASCII */
2188                                 len = strnlen(bcc_ptr, 1024);
2189                                 if (((long) bcc_ptr + len) - (long)
2190                                     pByteArea(smb_buffer_response)
2191                                             <= BCC(smb_buffer_response)) {
2192                                         ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
2193                                         if(ses->serverOS == NULL)
2194                                                 goto sesssetup_nomem;
2195                                         strncpy(ses->serverOS,bcc_ptr, len);
2196
2197                                         bcc_ptr += len;
2198                                         bcc_ptr[0] = 0; /* null terminate the string */
2199                                         bcc_ptr++;
2200
2201                                         len = strnlen(bcc_ptr, 1024);
2202                                         ses->serverNOS = kzalloc(len + 1,GFP_KERNEL);
2203                                         if(ses->serverNOS == NULL)
2204                                                 goto sesssetup_nomem;
2205                                         strncpy(ses->serverNOS, bcc_ptr, len);
2206                                         bcc_ptr += len;
2207                                         bcc_ptr[0] = 0;
2208                                         bcc_ptr++;
2209
2210                                         len = strnlen(bcc_ptr, 1024);
2211                                         ses->serverDomain = kzalloc(len + 1,GFP_KERNEL);
2212                                         if(ses->serverDomain == NULL)
2213                                                 goto sesssetup_nomem;
2214                                         strncpy(ses->serverDomain, bcc_ptr, len);
2215                                         bcc_ptr += len;
2216                                         bcc_ptr[0] = 0;
2217                                         bcc_ptr++;
2218                                 } else
2219                                         cFYI(1,
2220                                              ("Variable field of length %d extends beyond end of smb ",
2221                                               len));
2222                         }
2223                 } else {
2224                         cERROR(1,
2225                                (" Security Blob Length extends beyond end of SMB"));
2226                 }
2227         } else {
2228                 cERROR(1,
2229                        (" Invalid Word count %d: ",
2230                         smb_buffer_response->WordCount));
2231                 rc = -EIO;
2232         }
2233 sesssetup_nomem:        /* do not return an error on nomem for the info strings,
2234                            since that could make reconnection harder, and
2235                            reconnection might be needed to free memory */
2236         if (smb_buffer)
2237                 cifs_buf_release(smb_buffer);
2238
2239         return rc;
2240 }
2241
2242 static int
2243 CIFSSpnegoSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2244                 char *SecurityBlob,int SecurityBlobLength,
2245                 const struct nls_table *nls_codepage)
2246 {
2247         struct smb_hdr *smb_buffer;
2248         struct smb_hdr *smb_buffer_response;
2249         SESSION_SETUP_ANDX *pSMB;
2250         SESSION_SETUP_ANDX *pSMBr;
2251         char *bcc_ptr;
2252         char *user;
2253         char *domain;
2254         int rc = 0;
2255         int remaining_words = 0;
2256         int bytes_returned = 0;
2257         int len;
2258         __u32 capabilities;
2259         __u16 count;
2260
2261         cFYI(1, ("In spnego sesssetup "));
2262         if(ses == NULL)
2263                 return -EINVAL;
2264         user = ses->userName;
2265         domain = ses->domainName;
2266
2267         smb_buffer = cifs_buf_get();
2268         if (smb_buffer == NULL) {
2269                 return -ENOMEM;
2270         }
2271         smb_buffer_response = smb_buffer;
2272         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2273
2274         /* send SMBsessionSetup here */
2275         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2276                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2277
2278         smb_buffer->Mid = GetNextMid(ses->server);
2279         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2280         pSMB->req.AndXCommand = 0xFF;
2281         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2282         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2283
2284         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2285                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2286
2287         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2288             CAP_EXTENDED_SECURITY;
2289         if (ses->capabilities & CAP_UNICODE) {
2290                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2291                 capabilities |= CAP_UNICODE;
2292         }
2293         if (ses->capabilities & CAP_STATUS32) {
2294                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2295                 capabilities |= CAP_STATUS32;
2296         }
2297         if (ses->capabilities & CAP_DFS) {
2298                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2299                 capabilities |= CAP_DFS;
2300         }
2301         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2302
2303         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2304         bcc_ptr = pByteArea(smb_buffer);
2305         memcpy(bcc_ptr, SecurityBlob, SecurityBlobLength);
2306         bcc_ptr += SecurityBlobLength;
2307
2308         if (ses->capabilities & CAP_UNICODE) {
2309                 if ((long) bcc_ptr % 2) {       /* must be word aligned for Unicode strings */
2310                         *bcc_ptr = 0;
2311                         bcc_ptr++;
2312                 }
2313                 bytes_returned =
2314                     cifs_strtoUCS((__le16 *) bcc_ptr, user, 100, nls_codepage);
2315                 bcc_ptr += 2 * bytes_returned;  /* convert num of 16 bit words to bytes */
2316                 bcc_ptr += 2;   /* trailing null */
2317                 if (domain == NULL)
2318                         bytes_returned =
2319                             cifs_strtoUCS((__le16 *) bcc_ptr,
2320                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2321                 else
2322                         bytes_returned =
2323                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2324                                           nls_codepage);
2325                 bcc_ptr += 2 * bytes_returned;
2326                 bcc_ptr += 2;
2327                 bytes_returned =
2328                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2329                                   32, nls_codepage);
2330                 bcc_ptr += 2 * bytes_returned;
2331                 bytes_returned =
2332                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release, 32,
2333                                   nls_codepage);
2334                 bcc_ptr += 2 * bytes_returned;
2335                 bcc_ptr += 2;
2336                 bytes_returned =
2337                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2338                                   64, nls_codepage);
2339                 bcc_ptr += 2 * bytes_returned;
2340                 bcc_ptr += 2;
2341         } else {
2342                 strncpy(bcc_ptr, user, 200);
2343                 bcc_ptr += strnlen(user, 200);
2344                 *bcc_ptr = 0;
2345                 bcc_ptr++;
2346                 if (domain == NULL) {
2347                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2348                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2349                 } else {
2350                         strncpy(bcc_ptr, domain, 64);
2351                         bcc_ptr += strnlen(domain, 64);
2352                         *bcc_ptr = 0;
2353                         bcc_ptr++;
2354                 }
2355                 strcpy(bcc_ptr, "Linux version ");
2356                 bcc_ptr += strlen("Linux version ");
2357                 strcpy(bcc_ptr, system_utsname.release);
2358                 bcc_ptr += strlen(system_utsname.release) + 1;
2359                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2360                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2361         }
2362         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2363         smb_buffer->smb_buf_length += count;
2364         pSMB->req.ByteCount = cpu_to_le16(count);
2365
2366         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2367                          &bytes_returned, 1);
2368         if (rc) {
2369 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2370         } else if ((smb_buffer_response->WordCount == 3)
2371                    || (smb_buffer_response->WordCount == 4)) {
2372                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2373                 __u16 blob_len =
2374                     le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2375                 if (action & GUEST_LOGIN)
2376                         cFYI(1, (" Guest login"));      /* BB do we want to set anything in SesInfo struct ? */
2377                 if (ses) {
2378                         ses->Suid = smb_buffer_response->Uid;   /* UID left in wire format (le) */
2379                         cFYI(1, ("UID = %d ", ses->Suid));
2380                         bcc_ptr = pByteArea(smb_buffer_response);       /* response can have either 3 or 4 word count - Samba sends 3 */
2381
2382                         /* BB Fix below to make endian neutral !! */
2383
2384                         if ((pSMBr->resp.hdr.WordCount == 3)
2385                             || ((pSMBr->resp.hdr.WordCount == 4)
2386                                 && (blob_len <
2387                                     pSMBr->resp.ByteCount))) {
2388                                 if (pSMBr->resp.hdr.WordCount == 4) {
2389                                         bcc_ptr +=
2390                                             blob_len;
2391                                         cFYI(1,
2392                                              ("Security Blob Length %d ",
2393                                               blob_len));
2394                                 }
2395
2396                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2397                                         if ((long) (bcc_ptr) % 2) {
2398                                                 remaining_words =
2399                                                     (BCC(smb_buffer_response)
2400                                                      - 1) / 2;
2401                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
2402                                         } else {
2403                                                 remaining_words =
2404                                                     BCC
2405                                                     (smb_buffer_response) / 2;
2406                                         }
2407                                         len =
2408                                             UniStrnlen((wchar_t *) bcc_ptr,
2409                                                        remaining_words - 1);
2410 /* We look for obvious messed up bcc or strings in response so we do not go off
2411    the end since (at least) WIN2K and Windows XP have a major bug in not null
2412    terminating last Unicode string in response  */
2413                                         ses->serverOS =
2414                                             kzalloc(2 * (len + 1), GFP_KERNEL);
2415                                         cifs_strfromUCS_le(ses->serverOS,
2416                                                            (__le16 *)
2417                                                            bcc_ptr, len,
2418                                                            nls_codepage);
2419                                         bcc_ptr += 2 * (len + 1);
2420                                         remaining_words -= len + 1;
2421                                         ses->serverOS[2 * len] = 0;
2422                                         ses->serverOS[1 + (2 * len)] = 0;
2423                                         if (remaining_words > 0) {
2424                                                 len = UniStrnlen((wchar_t *)bcc_ptr,
2425                                                                  remaining_words
2426                                                                  - 1);
2427                                                 ses->serverNOS =
2428                                                     kzalloc(2 * (len + 1),
2429                                                             GFP_KERNEL);
2430                                                 cifs_strfromUCS_le(ses->serverNOS,
2431                                                                    (__le16 *)bcc_ptr,
2432                                                                    len,
2433                                                                    nls_codepage);
2434                                                 bcc_ptr += 2 * (len + 1);
2435                                                 ses->serverNOS[2 * len] = 0;
2436                                                 ses->serverNOS[1 + (2 * len)] = 0;
2437                                                 remaining_words -= len + 1;
2438                                                 if (remaining_words > 0) {
2439                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2440                             /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2441                                                         ses->serverDomain = kzalloc(2*(len+1),GFP_KERNEL);
2442                                                         cifs_strfromUCS_le(ses->serverDomain,
2443                                                              (__le16 *)bcc_ptr,
2444                                                              len, nls_codepage);
2445                                                         bcc_ptr += 2*(len+1);
2446                                                         ses->serverDomain[2*len] = 0;
2447                                                         ses->serverDomain[1+(2*len)] = 0;
2448                                                 } /* else no more room so create dummy domain string */
2449                                                 else
2450                                                         ses->serverDomain =
2451                                                             kzalloc(2,GFP_KERNEL);
2452                                         } else {        /* no room so create dummy domain and NOS string */
2453                                                 ses->serverDomain = kzalloc(2, GFP_KERNEL);
2454                                                 ses->serverNOS = kzalloc(2, GFP_KERNEL);
2455                                         }
2456                                 } else {        /* ASCII */
2457
2458                                         len = strnlen(bcc_ptr, 1024);
2459                                         if (((long) bcc_ptr + len) - (long)
2460                                             pByteArea(smb_buffer_response)
2461                                             <= BCC(smb_buffer_response)) {
2462                                                 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
2463                                                 strncpy(ses->serverOS, bcc_ptr, len);
2464
2465                                                 bcc_ptr += len;
2466                                                 bcc_ptr[0] = 0; /* null terminate the string */
2467                                                 bcc_ptr++;
2468
2469                                                 len = strnlen(bcc_ptr, 1024);
2470                                                 ses->serverNOS = kzalloc(len + 1,GFP_KERNEL);
2471                                                 strncpy(ses->serverNOS, bcc_ptr, len);
2472                                                 bcc_ptr += len;
2473                                                 bcc_ptr[0] = 0;
2474                                                 bcc_ptr++;
2475
2476                                                 len = strnlen(bcc_ptr, 1024);
2477                                                 ses->serverDomain = kzalloc(len + 1, GFP_KERNEL);
2478                                                 strncpy(ses->serverDomain, bcc_ptr, len);
2479                                                 bcc_ptr += len;
2480                                                 bcc_ptr[0] = 0;
2481                                                 bcc_ptr++;
2482                                         } else
2483                                                 cFYI(1,
2484                                                      ("Variable field of length %d extends beyond end of smb ",
2485                                                       len));
2486                                 }
2487                         } else {
2488                                 cERROR(1,
2489                                        (" Security Blob Length extends beyond end of SMB"));
2490                         }
2491                 } else {
2492                         cERROR(1, ("No session structure passed in."));
2493                 }
2494         } else {
2495                 cERROR(1,
2496                        (" Invalid Word count %d: ",
2497                         smb_buffer_response->WordCount));
2498                 rc = -EIO;
2499         }
2500
2501         if (smb_buffer)
2502                 cifs_buf_release(smb_buffer);
2503
2504         return rc;
2505 }
2506
2507 static int
2508 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2509                               struct cifsSesInfo *ses, int * pNTLMv2_flag,
2510                               const struct nls_table *nls_codepage)
2511 {
2512         struct smb_hdr *smb_buffer;
2513         struct smb_hdr *smb_buffer_response;
2514         SESSION_SETUP_ANDX *pSMB;
2515         SESSION_SETUP_ANDX *pSMBr;
2516         char *bcc_ptr;
2517         char *domain;
2518         int rc = 0;
2519         int remaining_words = 0;
2520         int bytes_returned = 0;
2521         int len;
2522         int SecurityBlobLength = sizeof (NEGOTIATE_MESSAGE);
2523         PNEGOTIATE_MESSAGE SecurityBlob;
2524         PCHALLENGE_MESSAGE SecurityBlob2;
2525         __u32 negotiate_flags, capabilities;
2526         __u16 count;
2527
2528         cFYI(1, ("In NTLMSSP sesssetup (negotiate) "));
2529         if(ses == NULL)
2530                 return -EINVAL;
2531         domain = ses->domainName;
2532         *pNTLMv2_flag = FALSE;
2533         smb_buffer = cifs_buf_get();
2534         if (smb_buffer == NULL) {
2535                 return -ENOMEM;
2536         }
2537         smb_buffer_response = smb_buffer;
2538         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2539         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2540
2541         /* send SMBsessionSetup here */
2542         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2543                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2544
2545         smb_buffer->Mid = GetNextMid(ses->server);
2546         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2547         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2548
2549         pSMB->req.AndXCommand = 0xFF;
2550         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2551         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2552
2553         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2554                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2555
2556         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2557             CAP_EXTENDED_SECURITY;
2558         if (ses->capabilities & CAP_UNICODE) {
2559                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2560                 capabilities |= CAP_UNICODE;
2561         }
2562         if (ses->capabilities & CAP_STATUS32) {
2563                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2564                 capabilities |= CAP_STATUS32;
2565         }
2566         if (ses->capabilities & CAP_DFS) {
2567                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2568                 capabilities |= CAP_DFS;
2569         }
2570         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2571
2572         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2573         SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2574         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2575         SecurityBlob->MessageType = NtLmNegotiate;
2576         negotiate_flags =
2577             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2578             NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM | 0x80000000 |
2579             /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2580         if(sign_CIFS_PDUs)
2581                 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2582         if(ntlmv2_support)
2583                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
2584         /* setup pointers to domain name and workstation name */
2585         bcc_ptr += SecurityBlobLength;
2586
2587         SecurityBlob->WorkstationName.Buffer = 0;
2588         SecurityBlob->WorkstationName.Length = 0;
2589         SecurityBlob->WorkstationName.MaximumLength = 0;
2590
2591         if (domain == NULL) {
2592                 SecurityBlob->DomainName.Buffer = 0;
2593                 SecurityBlob->DomainName.Length = 0;
2594                 SecurityBlob->DomainName.MaximumLength = 0;
2595         } else {
2596                 __u16 len;
2597                 negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
2598                 strncpy(bcc_ptr, domain, 63);
2599                 len = strnlen(domain, 64);
2600                 SecurityBlob->DomainName.MaximumLength =
2601                     cpu_to_le16(len);
2602                 SecurityBlob->DomainName.Buffer =
2603                     cpu_to_le32((long) &SecurityBlob->
2604                                 DomainString -
2605                                 (long) &SecurityBlob->Signature);
2606                 bcc_ptr += len;
2607                 SecurityBlobLength += len;
2608                 SecurityBlob->DomainName.Length =
2609                     cpu_to_le16(len);
2610         }
2611         if (ses->capabilities & CAP_UNICODE) {
2612                 if ((long) bcc_ptr % 2) {
2613                         *bcc_ptr = 0;
2614                         bcc_ptr++;
2615                 }
2616
2617                 bytes_returned =
2618                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2619                                   32, nls_codepage);
2620                 bcc_ptr += 2 * bytes_returned;
2621                 bytes_returned =
2622                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release, 32,
2623                                   nls_codepage);
2624                 bcc_ptr += 2 * bytes_returned;
2625                 bcc_ptr += 2;   /* null terminate Linux version */
2626                 bytes_returned =
2627                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2628                                   64, nls_codepage);
2629                 bcc_ptr += 2 * bytes_returned;
2630                 *(bcc_ptr + 1) = 0;
2631                 *(bcc_ptr + 2) = 0;
2632                 bcc_ptr += 2;   /* null terminate network opsys string */
2633                 *(bcc_ptr + 1) = 0;
2634                 *(bcc_ptr + 2) = 0;
2635                 bcc_ptr += 2;   /* null domain */
2636         } else {                /* ASCII */
2637                 strcpy(bcc_ptr, "Linux version ");
2638                 bcc_ptr += strlen("Linux version ");
2639                 strcpy(bcc_ptr, system_utsname.release);
2640                 bcc_ptr += strlen(system_utsname.release) + 1;
2641                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2642                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2643                 bcc_ptr++;      /* empty domain field */
2644                 *bcc_ptr = 0;
2645         }
2646         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2647         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2648         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2649         smb_buffer->smb_buf_length += count;
2650         pSMB->req.ByteCount = cpu_to_le16(count);
2651
2652         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2653                          &bytes_returned, 1);
2654
2655         if (smb_buffer_response->Status.CifsError ==
2656             cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
2657                 rc = 0;
2658
2659         if (rc) {
2660 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2661         } else if ((smb_buffer_response->WordCount == 3)
2662                    || (smb_buffer_response->WordCount == 4)) {
2663                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2664                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2665
2666                 if (action & GUEST_LOGIN)
2667                         cFYI(1, (" Guest login"));
2668         /* Do we want to set anything in SesInfo struct when guest login? */
2669
2670                 bcc_ptr = pByteArea(smb_buffer_response);
2671         /* response can have either 3 or 4 word count - Samba sends 3 */
2672
2673                 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
2674                 if (SecurityBlob2->MessageType != NtLmChallenge) {
2675                         cFYI(1,
2676                              ("Unexpected NTLMSSP message type received %d",
2677                               SecurityBlob2->MessageType));
2678                 } else if (ses) {
2679                         ses->Suid = smb_buffer_response->Uid; /* UID left in le format */
2680                         cFYI(1, ("UID = %d ", ses->Suid));
2681                         if ((pSMBr->resp.hdr.WordCount == 3)
2682                             || ((pSMBr->resp.hdr.WordCount == 4)
2683                                 && (blob_len <
2684                                     pSMBr->resp.ByteCount))) {
2685
2686                                 if (pSMBr->resp.hdr.WordCount == 4) {
2687                                         bcc_ptr += blob_len;
2688                                         cFYI(1,
2689                                              ("Security Blob Length %d ",
2690                                               blob_len));
2691                                 }
2692
2693                                 cFYI(1, ("NTLMSSP Challenge rcvd "));
2694
2695                                 memcpy(ses->server->cryptKey,
2696                                        SecurityBlob2->Challenge,
2697                                        CIFS_CRYPTO_KEY_SIZE);
2698                                 if(SecurityBlob2->NegotiateFlags & cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
2699                                         *pNTLMv2_flag = TRUE;
2700
2701                                 if((SecurityBlob2->NegotiateFlags &
2702                                         cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN))
2703                                         || (sign_CIFS_PDUs > 1))
2704                                                 ses->server->secMode |=
2705                                                         SECMODE_SIGN_REQUIRED;
2706                                 if ((SecurityBlob2->NegotiateFlags &
2707                                         cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
2708                                                 ses->server->secMode |=
2709                                                         SECMODE_SIGN_ENABLED;
2710
2711                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2712                                         if ((long) (bcc_ptr) % 2) {
2713                                                 remaining_words =
2714                                                     (BCC(smb_buffer_response)
2715                                                      - 1) / 2;
2716                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
2717                                         } else {
2718                                                 remaining_words =
2719                                                     BCC
2720                                                     (smb_buffer_response) / 2;
2721                                         }
2722                                         len =
2723                                             UniStrnlen((wchar_t *) bcc_ptr,
2724                                                        remaining_words - 1);
2725 /* We look for obvious messed up bcc or strings in response so we do not go off
2726    the end since (at least) WIN2K and Windows XP have a major bug in not null
2727    terminating last Unicode string in response  */
2728                                         ses->serverOS =
2729                                             kzalloc(2 * (len + 1), GFP_KERNEL);
2730                                         cifs_strfromUCS_le(ses->serverOS,
2731                                                            (__le16 *)
2732                                                            bcc_ptr, len,
2733                                                            nls_codepage);
2734                                         bcc_ptr += 2 * (len + 1);
2735                                         remaining_words -= len + 1;
2736                                         ses->serverOS[2 * len] = 0;
2737                                         ses->serverOS[1 + (2 * len)] = 0;
2738                                         if (remaining_words > 0) {
2739                                                 len = UniStrnlen((wchar_t *)
2740                                                                  bcc_ptr,
2741                                                                  remaining_words
2742                                                                  - 1);
2743                                                 ses->serverNOS =
2744                                                     kzalloc(2 * (len + 1),
2745                                                             GFP_KERNEL);
2746                                                 cifs_strfromUCS_le(ses->
2747                                                                    serverNOS,
2748                                                                    (__le16 *)
2749                                                                    bcc_ptr,
2750                                                                    len,
2751                                                                    nls_codepage);
2752                                                 bcc_ptr += 2 * (len + 1);
2753                                                 ses->serverNOS[2 * len] = 0;
2754                                                 ses->serverNOS[1 +
2755                                                                (2 * len)] = 0;
2756                                                 remaining_words -= len + 1;
2757                                                 if (remaining_words > 0) {
2758                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2759            /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2760                                                         ses->serverDomain =
2761                                                             kzalloc(2 *
2762                                                                     (len +
2763                                                                      1),
2764                                                                     GFP_KERNEL);
2765                                                         cifs_strfromUCS_le
2766                                                             (ses->serverDomain,
2767                                                              (__le16 *)bcc_ptr,
2768                                                              len, nls_codepage);
2769                                                         bcc_ptr +=
2770                                                             2 * (len + 1);
2771                                                         ses->serverDomain[2*len]
2772                                                             = 0;
2773                                                         ses->serverDomain
2774                                                                 [1 + (2 * len)]
2775                                                             = 0;
2776                                                 } /* else no more room so create dummy domain string */
2777                                                 else
2778                                                         ses->serverDomain =
2779                                                             kzalloc(2,
2780                                                                     GFP_KERNEL);
2781                                         } else {        /* no room so create dummy domain and NOS string */
2782                                                 ses->serverDomain =
2783                                                     kzalloc(2, GFP_KERNEL);
2784                                                 ses->serverNOS =
2785                                                     kzalloc(2, GFP_KERNEL);
2786                                         }
2787                                 } else {        /* ASCII */
2788                                         len = strnlen(bcc_ptr, 1024);
2789                                         if (((long) bcc_ptr + len) - (long)
2790                                             pByteArea(smb_buffer_response)
2791                                             <= BCC(smb_buffer_response)) {
2792                                                 ses->serverOS =
2793                                                     kzalloc(len + 1,
2794                                                             GFP_KERNEL);
2795                                                 strncpy(ses->serverOS,
2796                                                         bcc_ptr, len);
2797
2798                                                 bcc_ptr += len;
2799                                                 bcc_ptr[0] = 0; /* null terminate string */
2800                                                 bcc_ptr++;
2801
2802                                                 len = strnlen(bcc_ptr, 1024);
2803                                                 ses->serverNOS =
2804                                                     kzalloc(len + 1,
2805                                                             GFP_KERNEL);
2806                                                 strncpy(ses->serverNOS, bcc_ptr, len);
2807                                                 bcc_ptr += len;
2808                                                 bcc_ptr[0] = 0;
2809                                                 bcc_ptr++;
2810
2811                                                 len = strnlen(bcc_ptr, 1024);
2812                                                 ses->serverDomain =
2813                                                     kzalloc(len + 1,
2814                                                             GFP_KERNEL);
2815                                                 strncpy(ses->serverDomain, bcc_ptr, len);
2816                                                 bcc_ptr += len;
2817                                                 bcc_ptr[0] = 0;
2818                                                 bcc_ptr++;
2819                                         } else
2820                                                 cFYI(1,
2821                                                      ("Variable field of length %d extends beyond end of smb ",
2822                                                       len));
2823                                 }
2824                         } else {
2825                                 cERROR(1,
2826                                        (" Security Blob Length extends beyond end of SMB"));
2827                         }
2828                 } else {
2829                         cERROR(1, ("No session structure passed in."));
2830                 }
2831         } else {
2832                 cERROR(1,
2833                        (" Invalid Word count %d: ",
2834                         smb_buffer_response->WordCount));
2835                 rc = -EIO;
2836         }
2837
2838         if (smb_buffer)
2839                 cifs_buf_release(smb_buffer);
2840
2841         return rc;
2842 }
2843 static int
2844 CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2845                 char *ntlm_session_key, int ntlmv2_flag,
2846                 const struct nls_table *nls_codepage)
2847 {
2848         struct smb_hdr *smb_buffer;
2849         struct smb_hdr *smb_buffer_response;
2850         SESSION_SETUP_ANDX *pSMB;
2851         SESSION_SETUP_ANDX *pSMBr;
2852         char *bcc_ptr;
2853         char *user;
2854         char *domain;
2855         int rc = 0;
2856         int remaining_words = 0;
2857         int bytes_returned = 0;
2858         int len;
2859         int SecurityBlobLength = sizeof (AUTHENTICATE_MESSAGE);
2860         PAUTHENTICATE_MESSAGE SecurityBlob;
2861         __u32 negotiate_flags, capabilities;
2862         __u16 count;
2863
2864         cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
2865         if(ses == NULL)
2866                 return -EINVAL;
2867         user = ses->userName;
2868         domain = ses->domainName;
2869         smb_buffer = cifs_buf_get();
2870         if (smb_buffer == NULL) {
2871                 return -ENOMEM;
2872         }
2873         smb_buffer_response = smb_buffer;
2874         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2875         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2876
2877         /* send SMBsessionSetup here */
2878         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2879                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2880
2881         smb_buffer->Mid = GetNextMid(ses->server);
2882         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2883         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2884         pSMB->req.AndXCommand = 0xFF;
2885         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2886         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2887
2888         pSMB->req.hdr.Uid = ses->Suid;
2889
2890         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2891                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2892
2893         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2894             CAP_EXTENDED_SECURITY;
2895         if (ses->capabilities & CAP_UNICODE) {
2896                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2897                 capabilities |= CAP_UNICODE;
2898         }
2899         if (ses->capabilities & CAP_STATUS32) {
2900                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2901                 capabilities |= CAP_STATUS32;
2902         }
2903         if (ses->capabilities & CAP_DFS) {
2904                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2905                 capabilities |= CAP_DFS;
2906         }
2907         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2908
2909         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2910         SecurityBlob = (PAUTHENTICATE_MESSAGE) bcc_ptr;
2911         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2912         SecurityBlob->MessageType = NtLmAuthenticate;
2913         bcc_ptr += SecurityBlobLength;
2914         negotiate_flags =
2915             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
2916             NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
2917             0x80000000 | NTLMSSP_NEGOTIATE_128;
2918         if(sign_CIFS_PDUs)
2919                 negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
2920         if(ntlmv2_flag)
2921                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
2922
2923 /* setup pointers to domain name and workstation name */
2924
2925         SecurityBlob->WorkstationName.Buffer = 0;
2926         SecurityBlob->WorkstationName.Length = 0;
2927         SecurityBlob->WorkstationName.MaximumLength = 0;
2928         SecurityBlob->SessionKey.Length = 0;
2929         SecurityBlob->SessionKey.MaximumLength = 0;
2930         SecurityBlob->SessionKey.Buffer = 0;
2931
2932         SecurityBlob->LmChallengeResponse.Length = 0;
2933         SecurityBlob->LmChallengeResponse.MaximumLength = 0;
2934         SecurityBlob->LmChallengeResponse.Buffer = 0;
2935
2936         SecurityBlob->NtChallengeResponse.Length =
2937             cpu_to_le16(CIFS_SESSION_KEY_SIZE);
2938         SecurityBlob->NtChallengeResponse.MaximumLength =
2939             cpu_to_le16(CIFS_SESSION_KEY_SIZE);
2940         memcpy(bcc_ptr, ntlm_session_key, CIFS_SESSION_KEY_SIZE);
2941         SecurityBlob->NtChallengeResponse.Buffer =
2942             cpu_to_le32(SecurityBlobLength);
2943         SecurityBlobLength += CIFS_SESSION_KEY_SIZE;
2944         bcc_ptr += CIFS_SESSION_KEY_SIZE;
2945
2946         if (ses->capabilities & CAP_UNICODE) {
2947                 if (domain == NULL) {
2948                         SecurityBlob->DomainName.Buffer = 0;
2949                         SecurityBlob->DomainName.Length = 0;
2950                         SecurityBlob->DomainName.MaximumLength = 0;
2951                 } else {
2952                         __u16 len =
2953                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2954                                           nls_codepage);
2955                         len *= 2;
2956                         SecurityBlob->DomainName.MaximumLength =
2957                             cpu_to_le16(len);
2958                         SecurityBlob->DomainName.Buffer =
2959                             cpu_to_le32(SecurityBlobLength);
2960                         bcc_ptr += len;
2961                         SecurityBlobLength += len;
2962                         SecurityBlob->DomainName.Length =
2963                             cpu_to_le16(len);
2964                 }
2965                 if (user == NULL) {
2966                         SecurityBlob->UserName.Buffer = 0;
2967                         SecurityBlob->UserName.Length = 0;
2968                         SecurityBlob->UserName.MaximumLength = 0;
2969                 } else {
2970                         __u16 len =
2971                             cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
2972                                           nls_codepage);
2973                         len *= 2;
2974                         SecurityBlob->UserName.MaximumLength =
2975                             cpu_to_le16(len);
2976                         SecurityBlob->UserName.Buffer =
2977                             cpu_to_le32(SecurityBlobLength);
2978                         bcc_ptr += len;
2979                         SecurityBlobLength += len;
2980                         SecurityBlob->UserName.Length =
2981                             cpu_to_le16(len);
2982                 }
2983
2984                 /* SecurityBlob->WorkstationName.Length = cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
2985                    SecurityBlob->WorkstationName.Length *= 2;
2986                    SecurityBlob->WorkstationName.MaximumLength = cpu_to_le16(SecurityBlob->WorkstationName.Length);
2987                    SecurityBlob->WorkstationName.Buffer = cpu_to_le32(SecurityBlobLength);
2988                    bcc_ptr += SecurityBlob->WorkstationName.Length;
2989                    SecurityBlobLength += SecurityBlob->WorkstationName.Length;
2990                    SecurityBlob->WorkstationName.Length = cpu_to_le16(SecurityBlob->WorkstationName.Length);  */
2991
2992                 if ((long) bcc_ptr % 2) {
2993                         *bcc_ptr = 0;
2994                         bcc_ptr++;
2995                 }
2996                 bytes_returned =
2997                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2998                                   32, nls_codepage);
2999                 bcc_ptr += 2 * bytes_returned;
3000                 bytes_returned =
3001                     cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release, 32,
3002                                   nls_codepage);
3003                 bcc_ptr += 2 * bytes_returned;
3004                 bcc_ptr += 2;   /* null term version string */
3005                 bytes_returned =
3006                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
3007                                   64, nls_codepage);
3008                 bcc_ptr += 2 * bytes_returned;
3009                 *(bcc_ptr + 1) = 0;
3010                 *(bcc_ptr + 2) = 0;
3011                 bcc_ptr += 2;   /* null terminate network opsys string */
3012                 *(bcc_ptr + 1) = 0;
3013                 *(bcc_ptr + 2) = 0;
3014                 bcc_ptr += 2;   /* null domain */
3015         } else {                /* ASCII */
3016                 if (domain == NULL) {
3017                         SecurityBlob->DomainName.Buffer = 0;
3018                         SecurityBlob->DomainName.Length = 0;
3019                         SecurityBlob->DomainName.MaximumLength = 0;
3020                 } else {
3021                         __u16 len;
3022                         negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
3023                         strncpy(bcc_ptr, domain, 63);
3024                         len = strnlen(domain, 64);
3025                         SecurityBlob->DomainName.MaximumLength =
3026                             cpu_to_le16(len);
3027                         SecurityBlob->DomainName.Buffer =
3028                             cpu_to_le32(SecurityBlobLength);
3029                         bcc_ptr += len;
3030                         SecurityBlobLength += len;
3031                         SecurityBlob->DomainName.Length = cpu_to_le16(len);
3032                 }
3033                 if (user == NULL) {
3034                         SecurityBlob->UserName.Buffer = 0;
3035                         SecurityBlob->UserName.Length = 0;
3036                         SecurityBlob->UserName.MaximumLength = 0;
3037                 } else {
3038                         __u16 len;
3039                         strncpy(bcc_ptr, user, 63);
3040                         len = strnlen(user, 64);
3041                         SecurityBlob->UserName.MaximumLength =
3042                             cpu_to_le16(len);
3043                         SecurityBlob->UserName.Buffer =
3044                             cpu_to_le32(SecurityBlobLength);
3045                         bcc_ptr += len;
3046                         SecurityBlobLength += len;
3047                         SecurityBlob->UserName.Length = cpu_to_le16(len);
3048                 }
3049                 /* BB fill in our workstation name if known BB */
3050
3051                 strcpy(bcc_ptr, "Linux version ");
3052                 bcc_ptr += strlen("Linux version ");
3053                 strcpy(bcc_ptr, system_utsname.release);
3054                 bcc_ptr += strlen(system_utsname.release) + 1;
3055                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
3056                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
3057                 bcc_ptr++;      /* null domain */
3058                 *bcc_ptr = 0;
3059         }
3060         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
3061         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
3062         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
3063         smb_buffer->smb_buf_length += count;
3064         pSMB->req.ByteCount = cpu_to_le16(count);
3065
3066         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
3067                          &bytes_returned, 1);
3068         if (rc) {
3069 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
3070         } else if ((smb_buffer_response->WordCount == 3)
3071                    || (smb_buffer_response->WordCount == 4)) {
3072                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
3073                 __u16 blob_len =
3074                     le16_to_cpu(pSMBr->resp.SecurityBlobLength);
3075                 if (action & GUEST_LOGIN)
3076                         cFYI(1, (" Guest login"));      /* BB do we want to set anything in SesInfo struct ? */
3077 /*        if(SecurityBlob2->MessageType != NtLm??){
3078                  cFYI("Unexpected message type on auth response is %d "));
3079         } */
3080                 if (ses) {
3081                         cFYI(1,
3082                              ("Does UID on challenge %d match auth response UID %d ",
3083                               ses->Suid, smb_buffer_response->Uid));
3084                         ses->Suid = smb_buffer_response->Uid; /* UID left in wire format */
3085                         bcc_ptr = pByteArea(smb_buffer_response);
3086             /* response can have either 3 or 4 word count - Samba sends 3 */
3087                         if ((pSMBr->resp.hdr.WordCount == 3)
3088                             || ((pSMBr->resp.hdr.WordCount == 4)
3089                                 && (blob_len <
3090                                     pSMBr->resp.ByteCount))) {
3091                                 if (pSMBr->resp.hdr.WordCount == 4) {
3092                                         bcc_ptr +=
3093                                             blob_len;
3094                                         cFYI(1,
3095                                              ("Security Blob Length %d ",
3096                                               blob_len));
3097                                 }
3098
3099                                 cFYI(1,
3100                                      ("NTLMSSP response to Authenticate "));
3101
3102                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3103                                         if ((long) (bcc_ptr) % 2) {
3104                                                 remaining_words =
3105                                                     (BCC(smb_buffer_response)
3106                                                      - 1) / 2;
3107                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
3108                                         } else {
3109                                                 remaining_words = BCC(smb_buffer_response) / 2;
3110                                         }
3111                                         len =
3112                                             UniStrnlen((wchar_t *) bcc_ptr,remaining_words - 1);
3113 /* We look for obvious messed up bcc or strings in response so we do not go off
3114   the end since (at least) WIN2K and Windows XP have a major bug in not null
3115   terminating last Unicode string in response  */
3116                                         ses->serverOS =
3117                                             kzalloc(2 * (len + 1), GFP_KERNEL);
3118                                         cifs_strfromUCS_le(ses->serverOS,
3119                                                            (__le16 *)
3120                                                            bcc_ptr, len,
3121                                                            nls_codepage);
3122                                         bcc_ptr += 2 * (len + 1);
3123                                         remaining_words -= len + 1;
3124                                         ses->serverOS[2 * len] = 0;
3125                                         ses->serverOS[1 + (2 * len)] = 0;
3126                                         if (remaining_words > 0) {
3127                                                 len = UniStrnlen((wchar_t *)
3128                                                                  bcc_ptr,
3129                                                                  remaining_words
3130                                                                  - 1);
3131                                                 ses->serverNOS =
3132                                                     kzalloc(2 * (len + 1),
3133                                                             GFP_KERNEL);
3134                                                 cifs_strfromUCS_le(ses->
3135                                                                    serverNOS,
3136                                                                    (__le16 *)
3137                                                                    bcc_ptr,
3138                                                                    len,
3139                                                                    nls_codepage);
3140                                                 bcc_ptr += 2 * (len + 1);
3141                                                 ses->serverNOS[2 * len] = 0;
3142                                                 ses->serverNOS[1+(2*len)] = 0;
3143                                                 remaining_words -= len + 1;
3144                                                 if (remaining_words > 0) {
3145                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3146      /* last string not always null terminated (e.g. for Windows XP & 2000) */
3147                                                         ses->serverDomain =
3148                                                             kzalloc(2 *
3149                                                                     (len +
3150                                                                      1),
3151                                                                     GFP_KERNEL);
3152                                                         cifs_strfromUCS_le
3153                                                             (ses->
3154                                                              serverDomain,
3155                                                              (__le16 *)
3156                                                              bcc_ptr, len,
3157                                                              nls_codepage);
3158                                                         bcc_ptr +=
3159                                                             2 * (len + 1);
3160                                                         ses->
3161                                                             serverDomain[2
3162                                                                          * len]
3163                                                             = 0;
3164                                                         ses->
3165                                                             serverDomain[1
3166                                                                          +
3167                                                                          (2
3168                                                                           *
3169                                                                           len)]
3170                                                             = 0;
3171                                                 } /* else no more room so create dummy domain string */
3172                                                 else
3173                                                         ses->serverDomain = kzalloc(2,GFP_KERNEL);
3174                                         } else {  /* no room so create dummy domain and NOS string */
3175                                                 ses->serverDomain = kzalloc(2, GFP_KERNEL);
3176                                                 ses->serverNOS = kzalloc(2, GFP_KERNEL);
3177                                         }
3178                                 } else {        /* ASCII */
3179                                         len = strnlen(bcc_ptr, 1024);
3180                                         if (((long) bcc_ptr + len) -
3181                         (long) pByteArea(smb_buffer_response)
3182                             <= BCC(smb_buffer_response)) {
3183                                                 ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
3184                                                 strncpy(ses->serverOS,bcc_ptr, len);
3185
3186                                                 bcc_ptr += len;
3187                                                 bcc_ptr[0] = 0; /* null terminate the string */
3188                                                 bcc_ptr++;
3189
3190                                                 len = strnlen(bcc_ptr, 1024);
3191                                                 ses->serverNOS = kzalloc(len+1,GFP_KERNEL);
3192                                                 strncpy(ses->serverNOS, bcc_ptr, len);
3193                                                 bcc_ptr += len;
3194                                                 bcc_ptr[0] = 0;
3195                                                 bcc_ptr++;
3196
3197                                                 len = strnlen(bcc_ptr, 1024);
3198                                                 ses->serverDomain = kzalloc(len+1,GFP_KERNEL);
3199                                                 strncpy(ses->serverDomain, bcc_ptr, len);
3200                                                 bcc_ptr += len;
3201                                                 bcc_ptr[0] = 0;
3202                                                 bcc_ptr++;
3203                                         } else
3204                                                 cFYI(1,
3205                                                      ("Variable field of length %d extends beyond end of smb ",
3206                                                       len));
3207                                 }
3208                         } else {
3209                                 cERROR(1,
3210                                        (" Security Blob Length extends beyond end of SMB"));
3211                         }
3212                 } else {
3213                         cERROR(1, ("No session structure passed in."));
3214                 }
3215         } else {
3216                 cERROR(1,
3217                        (" Invalid Word count %d: ",
3218                         smb_buffer_response->WordCount));
3219                 rc = -EIO;
3220         }
3221
3222         if (smb_buffer)
3223                 cifs_buf_release(smb_buffer);
3224
3225         return rc;
3226 }
3227
3228 int
3229 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
3230          const char *tree, struct cifsTconInfo *tcon,
3231          const struct nls_table *nls_codepage)
3232 {
3233         struct smb_hdr *smb_buffer;
3234         struct smb_hdr *smb_buffer_response;
3235         TCONX_REQ *pSMB;
3236         TCONX_RSP *pSMBr;
3237         unsigned char *bcc_ptr;
3238         int rc = 0;
3239         int length;
3240         __u16 count;
3241
3242         if (ses == NULL)
3243                 return -EIO;
3244
3245         smb_buffer = cifs_buf_get();
3246         if (smb_buffer == NULL) {
3247                 return -ENOMEM;
3248         }
3249         smb_buffer_response = smb_buffer;
3250
3251         header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3252                         NULL /*no tid */ , 4 /*wct */ );
3253
3254         smb_buffer->Mid = GetNextMid(ses->server);
3255         smb_buffer->Uid = ses->Suid;
3256         pSMB = (TCONX_REQ *) smb_buffer;
3257         pSMBr = (TCONX_RSP *) smb_buffer_response;
3258
3259         pSMB->AndXCommand = 0xFF;
3260         pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3261         bcc_ptr = &pSMB->Password[0];
3262         if((ses->server->secMode) & SECMODE_USER) {
3263                 pSMB->PasswordLength = cpu_to_le16(1);  /* minimum */
3264                 bcc_ptr++;              /* skip password */
3265         } else {
3266                 pSMB->PasswordLength = cpu_to_le16(CIFS_SESSION_KEY_SIZE);
3267                 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3268                    specified as required (when that support is added to
3269                    the vfs in the future) as only NTLM or the much
3270                    weaker LANMAN (which we do not send) is accepted
3271                    by Samba (not sure whether other servers allow
3272                    NTLMv2 password here) */
3273                 SMBNTencrypt(ses->password,
3274                              ses->server->cryptKey,
3275                              bcc_ptr);
3276
3277                 bcc_ptr += CIFS_SESSION_KEY_SIZE;
3278                 *bcc_ptr = 0;
3279                 bcc_ptr++; /* align */
3280         }
3281
3282         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3283                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3284
3285         if (ses->capabilities & CAP_STATUS32) {
3286                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3287         }
3288         if (ses->capabilities & CAP_DFS) {
3289                 smb_buffer->Flags2 |= SMBFLG2_DFS;
3290         }
3291         if (ses->capabilities & CAP_UNICODE) {
3292                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3293                 length =
3294                     cifs_strtoUCS((__le16 *) bcc_ptr, tree, 100, nls_codepage);
3295                 bcc_ptr += 2 * length;  /* convert num of 16 bit words to bytes */
3296                 bcc_ptr += 2;   /* skip trailing null */
3297         } else {                /* ASCII */
3298                 strcpy(bcc_ptr, tree);
3299                 bcc_ptr += strlen(tree) + 1;
3300         }
3301         strcpy(bcc_ptr, "?????");
3302         bcc_ptr += strlen("?????");
3303         bcc_ptr += 1;
3304         count = bcc_ptr - &pSMB->Password[0];
3305         pSMB->hdr.smb_buf_length += count;
3306         pSMB->ByteCount = cpu_to_le16(count);
3307
3308         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, 0);
3309
3310         /* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
3311         /* above now done in SendReceive */
3312         if ((rc == 0) && (tcon != NULL)) {
3313                 tcon->tidStatus = CifsGood;
3314                 tcon->tid = smb_buffer_response->Tid;
3315                 bcc_ptr = pByteArea(smb_buffer_response);
3316                 length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
3317         /* skip service field (NB: this field is always ASCII) */
3318                 bcc_ptr += length + 1;
3319                 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3320                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3321                         length = UniStrnlen((wchar_t *) bcc_ptr, 512);
3322                         if ((bcc_ptr + (2 * length)) -
3323                              pByteArea(smb_buffer_response) <=
3324                             BCC(smb_buffer_response)) {
3325                                 kfree(tcon->nativeFileSystem);
3326                                 tcon->nativeFileSystem =
3327                                     kzalloc(length + 2, GFP_KERNEL);
3328                                 cifs_strfromUCS_le(tcon->nativeFileSystem,
3329                                                    (__le16 *) bcc_ptr,
3330                                                    length, nls_codepage);
3331                                 bcc_ptr += 2 * length;
3332                                 bcc_ptr[0] = 0; /* null terminate the string */
3333                                 bcc_ptr[1] = 0;
3334                                 bcc_ptr += 2;
3335                         }
3336                         /* else do not bother copying these informational fields */
3337                 } else {
3338                         length = strnlen(bcc_ptr, 1024);
3339                         if ((bcc_ptr + length) -
3340                             pByteArea(smb_buffer_response) <=
3341                             BCC(smb_buffer_response)) {
3342                                 kfree(tcon->nativeFileSystem);
3343                                 tcon->nativeFileSystem =
3344                                     kzalloc(length + 1, GFP_KERNEL);
3345                                 strncpy(tcon->nativeFileSystem, bcc_ptr,
3346                                         length);
3347                         }
3348                         /* else do not bother copying these informational fields */
3349                 }
3350                 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3351                 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
3352         } else if ((rc == 0) && tcon == NULL) {
3353         /* all we need to save for IPC$ connection */
3354                 ses->ipc_tid = smb_buffer_response->Tid;
3355         }
3356
3357         if (smb_buffer)
3358                 cifs_buf_release(smb_buffer);
3359         return rc;
3360 }
3361
3362 int
3363 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3364 {
3365         int rc = 0;
3366         int xid;
3367         struct cifsSesInfo *ses = NULL;
3368         struct task_struct *cifsd_task;
3369
3370         xid = GetXid();
3371
3372         if (cifs_sb->tcon) {
3373                 ses = cifs_sb->tcon->ses; /* save ptr to ses before delete tcon!*/
3374                 rc = CIFSSMBTDis(xid, cifs_sb->tcon);
3375                 if (rc == -EBUSY) {
3376                         FreeXid(xid);
3377                         return 0;
3378                 }
3379                 tconInfoFree(cifs_sb->tcon);
3380                 if ((ses) && (ses->server)) {
3381                         /* save off task so we do not refer to ses later */
3382                         cifsd_task = ses->server->tsk;
3383                         cFYI(1, ("About to do SMBLogoff "));
3384                         rc = CIFSSMBLogoff(xid, ses);
3385                         if (rc == -EBUSY) {
3386                                 FreeXid(xid);
3387                                 return 0;
3388                         } else if (rc == -ESHUTDOWN) {
3389                                 cFYI(1,("Waking up socket by sending it signal"));
3390                                 if(cifsd_task) {
3391                                         send_sig(SIGKILL,cifsd_task,1);
3392                                         wait_for_completion(&cifsd_complete);
3393                                 }
3394                                 rc = 0;
3395                         } /* else - we have an smb session
3396                                 left on this socket do not kill cifsd */
3397                 } else
3398                         cFYI(1, ("No session or bad tcon"));
3399         }
3400
3401         cifs_sb->tcon = NULL;
3402         if (ses)
3403                 schedule_timeout_interruptible(msecs_to_jiffies(500));
3404         if (ses)
3405                 sesInfoFree(ses);
3406
3407         FreeXid(xid);
3408         return rc;              /* BB check if we should always return zero here */
3409 }
3410
3411 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3412                                            struct nls_table * nls_info)
3413 {
3414         int rc = 0;
3415         char ntlm_session_key[CIFS_SESSION_KEY_SIZE];
3416         int ntlmv2_flag = FALSE;
3417         int first_time = 0;
3418
3419         /* what if server changes its buffer size after dropping the session? */
3420         if(pSesInfo->server->maxBuf == 0) /* no need to send on reconnect */ {
3421                 rc = CIFSSMBNegotiate(xid, pSesInfo);
3422                 if(rc == -EAGAIN) /* retry only once on 1st time connection */ {
3423                         rc = CIFSSMBNegotiate(xid, pSesInfo);
3424                         if(rc == -EAGAIN)
3425                                 rc = -EHOSTDOWN;
3426                 }
3427                 if(rc == 0) {
3428                         spin_lock(&GlobalMid_Lock);
3429                         if(pSesInfo->server->tcpStatus != CifsExiting)
3430                                 pSesInfo->server->tcpStatus = CifsGood;
3431                         else
3432                                 rc = -EHOSTDOWN;
3433                         spin_unlock(&GlobalMid_Lock);
3434
3435                 }
3436                 first_time = 1;
3437         }
3438         if (!rc) {
3439                 pSesInfo->capabilities = pSesInfo->server->capabilities;
3440                 if(linuxExtEnabled == 0)
3441                         pSesInfo->capabilities &= (~CAP_UNIX);
3442         /*      pSesInfo->sequence_number = 0;*/
3443                 cFYI(1,("Security Mode: 0x%x Capabilities: 0x%x Time Zone: %d",
3444                         pSesInfo->server->secMode,
3445                         pSesInfo->server->capabilities,
3446                         pSesInfo->server->timeZone));
3447                 if (extended_security
3448                                 && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3449                                 && (pSesInfo->server->secType == NTLMSSP)) {
3450                         cFYI(1, ("New style sesssetup "));
3451                         rc = CIFSSpnegoSessSetup(xid, pSesInfo,
3452                                 NULL /* security blob */,
3453                                 0 /* blob length */,
3454                                 nls_info);
3455                 } else if (extended_security
3456                            && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3457                            && (pSesInfo->server->secType == RawNTLMSSP)) {
3458                         cFYI(1, ("NTLMSSP sesssetup "));
3459                         rc = CIFSNTLMSSPNegotiateSessSetup(xid,
3460                                                 pSesInfo,
3461                                                 &ntlmv2_flag,
3462                                                 nls_info);
3463                         if (!rc) {
3464                                 if(ntlmv2_flag) {
3465                                         char * v2_response;
3466                                         cFYI(1,("Can use more secure NTLM version 2 password hash"));
3467                                         if(CalcNTLMv2_partial_mac_key(pSesInfo,
3468                                                 nls_info)) {
3469                                                 rc = -ENOMEM;
3470                                                 goto ss_err_exit;
3471                                         } else
3472                                                 v2_response = kmalloc(16 + 64 /* blob */, GFP_KERNEL);
3473                                         if(v2_response) {
3474                                                 CalcNTLMv2_response(pSesInfo,v2_response);
3475                                 /*              if(first_time)
3476                                                         cifs_calculate_ntlmv2_mac_key(
3477                                                           pSesInfo->server->mac_signing_key,
3478                                                           response, ntlm_session_key, */
3479                                                 kfree(v2_response);
3480                                         /* BB Put dummy sig in SessSetup PDU? */
3481                                         } else {
3482                                                 rc = -ENOMEM;
3483                                                 goto ss_err_exit;
3484                                         }
3485
3486                                 } else {
3487                                         SMBNTencrypt(pSesInfo->password,
3488                                                 pSesInfo->server->cryptKey,
3489                                                 ntlm_session_key);
3490
3491                                         if(first_time)
3492                                                 cifs_calculate_mac_key(
3493                                                         pSesInfo->server->mac_signing_key,
3494                                                         ntlm_session_key,
3495                                                         pSesInfo->password);
3496                                 }
3497                         /* for better security the weaker lanman hash not sent
3498                            in AuthSessSetup so we no longer calculate it */
3499
3500                                 rc = CIFSNTLMSSPAuthSessSetup(xid,
3501                                         pSesInfo,
3502                                         ntlm_session_key,
3503                                         ntlmv2_flag,
3504                                         nls_info);
3505                         }
3506                 } else { /* old style NTLM 0.12 session setup */
3507                         SMBNTencrypt(pSesInfo->password,
3508                                 pSesInfo->server->cryptKey,
3509                                 ntlm_session_key);
3510
3511                         if(first_time)
3512                                 cifs_calculate_mac_key(
3513                                         pSesInfo->server->mac_signing_key,
3514                                         ntlm_session_key, pSesInfo->password);
3515
3516                         rc = CIFSSessSetup(xid, pSesInfo,
3517                                 ntlm_session_key, nls_info);
3518                 }
3519                 if (rc) {
3520                         cERROR(1,("Send error in SessSetup = %d",rc));
3521                 } else {
3522                         cFYI(1,("CIFS Session Established successfully"));
3523                         pSesInfo->status = CifsGood;
3524                 }
3525         }
3526 ss_err_exit:
3527         return rc;
3528 }
3529