fs/cifs/connect.c

   1 /*
   2  *   fs/cifs/connect.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2007
   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/kthread.h>
  34 #include <linux/pagevec.h>
  35 #include <linux/freezer.h>
  36 #include <asm/uaccess.h>
  37 #include <asm/processor.h>
  38 #include "cifspdu.h"
  39 #include "cifsglob.h"
  40 #include "cifsproto.h"
  41 #include "cifs_unicode.h"
  42 #include "cifs_debug.h"
  43 #include "cifs_fs_sb.h"
  44 #include "ntlmssp.h"
  45 #include "nterr.h"
  46 #include "rfc1002pdu.h"
  47 #include "cn_cifs.h"
  48
  49 #define CIFS_PORT 445
  50 #define RFC1001_PORT 139
  51
  52 static DECLARE_COMPLETION(cifsd_complete);
  53
  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 secFlg;
  74         unsigned rw:1;
  75         unsigned retry:1;
  76         unsigned intr:1;
  77         unsigned setuids:1;
  78         unsigned override_uid:1;
  79         unsigned override_gid:1;
  80         unsigned noperm:1;
  81         unsigned no_psx_acl:1; /* set if posix acl support should be disabled */
  82         unsigned cifs_acl:1;
  83         unsigned no_xattr:1;   /* set if xattr (EA) support should be disabled*/
  84         unsigned server_ino:1; /* use inode numbers from server ie UniqueId */
  85         unsigned direct_io:1;
  86         unsigned remap:1;   /* set to remap seven reserved chars in filenames */
  87         unsigned posix_paths:1;   /* unset to not ask for posix pathnames. */
  88         unsigned sfu_emul:1;
  89         unsigned nullauth:1; /* attempt to authenticate with null user */
  90         unsigned nocase;     /* request case insensitive filenames */
  91         unsigned nobrl;      /* disable sending byte range locks to srv */
  92         unsigned int rsize;
  93         unsigned int wsize;
  94         unsigned int sockopt;
  95         unsigned short int port;
  96         char * prepath;
  97 };
  98
  99 static int ipv4_connect(struct sockaddr_in *psin_server,
 100                         struct socket **csocket,
 101                         char * netb_name,
 102                         char * server_netb_name);
 103 static int ipv6_connect(struct sockaddr_in6 *psin_server,
 104                         struct socket **csocket);
 105
 106
 107         /*
 108          * cifs tcp session reconnection
 109          *
 110          * mark tcp session as reconnecting so temporarily locked
 111          * mark all smb sessions as reconnecting for tcp session
 112          * reconnect tcp session
 113          * wake up waiters on reconnection? - (not needed currently)
 114          */
 115
 116 static int
 117 cifs_reconnect(struct TCP_Server_Info *server)
 118 {
 119         int rc = 0;
 120         struct list_head *tmp;
 121         struct cifsSesInfo *ses;
 122         struct cifsTconInfo *tcon;
 123         struct mid_q_entry * mid_entry;
 124
 125         spin_lock(&GlobalMid_Lock);
 126         if( kthread_should_stop() ) {
 127                 /* the demux thread will exit normally
 128                 next time through the loop */
 129                 spin_unlock(&GlobalMid_Lock);
 130                 return rc;
 131         } else
 132                 server->tcpStatus = CifsNeedReconnect;
 133         spin_unlock(&GlobalMid_Lock);
 134         server->maxBuf = 0;
 135
 136         cFYI(1, ("Reconnecting tcp session"));
 137
 138         /* before reconnecting the tcp session, mark the smb session (uid)
 139                 and the tid bad so they are not used until reconnected */
 140         read_lock(&GlobalSMBSeslock);
 141         list_for_each(tmp, &GlobalSMBSessionList) {
 142                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
 143                 if (ses->server) {
 144                         if (ses->server == server) {
 145                                 ses->status = CifsNeedReconnect;
 146                                 ses->ipc_tid = 0;
 147                         }
 148                 }
 149                 /* else tcp and smb sessions need reconnection */
 150         }
 151         list_for_each(tmp, &GlobalTreeConnectionList) {
 152                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
 153                 if((tcon) && (tcon->ses) && (tcon->ses->server == server)) {
 154                         tcon->tidStatus = CifsNeedReconnect;
 155                 }
 156         }
 157         read_unlock(&GlobalSMBSeslock);
 158         /* do not want to be sending data on a socket we are freeing */
 159         down(&server->tcpSem);
 160         if(server->ssocket) {
 161                 cFYI(1, ("State: 0x%x Flags: 0x%lx", server->ssocket->state,
 162                         server->ssocket->flags));
 163                 server->ssocket->ops->shutdown(server->ssocket,SEND_SHUTDOWN);
 164                 cFYI(1, ("Post shutdown state: 0x%x Flags: 0x%lx",
 165                         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 ( (!kthread_should_stop()) && (server->tcpStatus != CifsGood))
 190         {
 191                 try_to_freeze();
 192                 if(server->protocolType == IPV6) {
 193                         rc = ipv6_connect(&server->addr.sockAddr6,&server->ssocket);
 194                 } else {
 195                         rc = ipv4_connect(&server->addr.sockAddr,
 196                                         &server->ssocket,
 197                                         server->workstation_RFC1001_name,
 198                                         server->server_RFC1001_name);
 199                 }
 200                 if(rc) {
 201                         cFYI(1, ("reconnect error %d",rc));
 202                         msleep(3000);
 203                 } else {
 204                         atomic_inc(&tcpSesReconnectCount);
 205                         spin_lock(&GlobalMid_Lock);
 206                         if( !kthread_should_stop() )
 207                                 server->tcpStatus = CifsGood;
 208                         server->sequence_number = 0;
 209                         spin_unlock(&GlobalMid_Lock);
 210         /*              atomic_set(&server->inFlight,0);*/
 211                         wake_up(&server->response_q);
 212                 }
 213         }
 214         return rc;
 215 }
 216
 217 /*
 218         return codes:
 219                 0       not a transact2, or all data present
 220                 >0      transact2 with that much data missing
 221                 -EINVAL = invalid transact2
 222
 223  */
 224 static int check2ndT2(struct smb_hdr * pSMB, unsigned int maxBufSize)
 225 {
 226         struct smb_t2_rsp * pSMBt;
 227         int total_data_size;
 228         int data_in_this_rsp;
 229         int remaining;
 230
 231         if(pSMB->Command != SMB_COM_TRANSACTION2)
 232                 return 0;
 233
 234         /* check for plausible wct, bcc and t2 data and parm sizes */
 235         /* check for parm and data offset going beyond end of smb */
 236         if(pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
 237                 cFYI(1, ("invalid transact2 word count"));
 238                 return -EINVAL;
 239         }
 240
 241         pSMBt = (struct smb_t2_rsp *)pSMB;
 242
 243         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 244         data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 245
 246         remaining = total_data_size - data_in_this_rsp;
 247
 248         if(remaining == 0)
 249                 return 0;
 250         else if(remaining < 0) {
 251                 cFYI(1, ("total data %d smaller than data in frame %d",
 252                         total_data_size, data_in_this_rsp));
 253                 return -EINVAL;
 254         } else {
 255                 cFYI(1, ("missing %d bytes from transact2, check next response",
 256                         remaining));
 257                 if(total_data_size > maxBufSize) {
 258                         cERROR(1,("TotalDataSize %d is over maximum buffer %d",
 259                                 total_data_size,maxBufSize));
 260                         return -EINVAL;
 261                 }
 262                 return remaining;
 263         }
 264 }
 265
 266 static int coalesce_t2(struct smb_hdr * psecond, struct smb_hdr *pTargetSMB)
 267 {
 268         struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
 269         struct smb_t2_rsp *pSMBt  = (struct smb_t2_rsp *)pTargetSMB;
 270         int total_data_size;
 271         int total_in_buf;
 272         int remaining;
 273         int total_in_buf2;
 274         char * data_area_of_target;
 275         char * data_area_of_buf2;
 276         __u16 byte_count;
 277
 278         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 279
 280         if(total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
 281                 cFYI(1,("total data sizes of primary and secondary t2 differ"));
 282         }
 283
 284         total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 285
 286         remaining = total_data_size - total_in_buf;
 287
 288         if(remaining < 0)
 289                 return -EINVAL;
 290
 291         if(remaining == 0) /* nothing to do, ignore */
 292                 return 0;
 293
 294         total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
 295         if(remaining < total_in_buf2) {
 296                 cFYI(1, ("transact2 2nd response contains too much data"));
 297         }
 298
 299         /* find end of first SMB data area */
 300         data_area_of_target = (char *)&pSMBt->hdr.Protocol +
 301                                 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
 302         /* validate target area */
 303
 304         data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
 305                                         le16_to_cpu(pSMB2->t2_rsp.DataOffset);
 306
 307         data_area_of_target += total_in_buf;
 308
 309         /* copy second buffer into end of first buffer */
 310         memcpy(data_area_of_target,data_area_of_buf2,total_in_buf2);
 311         total_in_buf += total_in_buf2;
 312         pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
 313         byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
 314         byte_count += total_in_buf2;
 315         BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
 316
 317         byte_count = pTargetSMB->smb_buf_length;
 318         byte_count += total_in_buf2;
 319
 320         /* BB also add check that we are not beyond maximum buffer size */
 321
 322         pTargetSMB->smb_buf_length = byte_count;
 323
 324         if(remaining == total_in_buf2) {
 325                 cFYI(1, ("found the last secondary response"));
 326                 return 0; /* we are done */
 327         } else /* more responses to go */
 328                 return 1;
 329
 330 }
 331
 332 static int
 333 cifs_demultiplex_thread(struct TCP_Server_Info *server)
 334 {
 335         int length;
 336         unsigned int pdu_length, total_read;
 337         struct smb_hdr *smb_buffer = NULL;
 338         struct smb_hdr *bigbuf = NULL;
 339         struct smb_hdr *smallbuf = NULL;
 340         struct msghdr smb_msg;
 341         struct kvec iov;
 342         struct socket *csocket = server->ssocket;
 343         struct list_head *tmp;
 344         struct cifsSesInfo *ses;
 345         struct task_struct *task_to_wake = NULL;
 346         struct mid_q_entry *mid_entry;
 347         char temp;
 348         int isLargeBuf = FALSE;
 349         int isMultiRsp;
 350         int reconnect;
 351
 352         current->flags |= PF_MEMALLOC;
 353         server->tsk = current;  /* save process info to wake at shutdown */
 354         cFYI(1, ("Demultiplex PID: %d", current->pid));
 355         write_lock(&GlobalSMBSeslock);
 356         atomic_inc(&tcpSesAllocCount);
 357         length = tcpSesAllocCount.counter;
 358         write_unlock(&GlobalSMBSeslock);
 359         complete(&cifsd_complete);
 360         if(length  > 1) {
 361                 mempool_resize(cifs_req_poolp,
 362                         length + cifs_min_rcv,
 363                         GFP_KERNEL);
 364         }
 365
 366         while (!kthread_should_stop()) {
 367                 if (try_to_freeze())
 368                         continue;
 369                 if (bigbuf == NULL) {
 370                         bigbuf = cifs_buf_get();
 371                         if (!bigbuf) {
 372                                 cERROR(1, ("No memory for large SMB response"));
 373                                 msleep(3000);
 374                                 /* retry will check if exiting */
 375                                 continue;
 376                         }
 377                 } else if (isLargeBuf) {
 378                         /* we are reusing a dirty large buf, clear its start */
 379                         memset(bigbuf, 0, sizeof (struct smb_hdr));
 380                 }
 381
 382                 if (smallbuf == NULL) {
 383                         smallbuf = cifs_small_buf_get();
 384                         if (!smallbuf) {
 385                                 cERROR(1, ("No memory for SMB response"));
 386                                 msleep(1000);
 387                                 /* retry will check if exiting */
 388                                 continue;
 389                         }
 390                         /* beginning of smb buffer is cleared in our buf_get */
 391                 } else /* if existing small buf clear beginning */
 392                         memset(smallbuf, 0, sizeof (struct smb_hdr));
 393
 394                 isLargeBuf = FALSE;
 395                 isMultiRsp = FALSE;
 396                 smb_buffer = smallbuf;
 397                 iov.iov_base = smb_buffer;
 398                 iov.iov_len = 4;
 399                 smb_msg.msg_control = NULL;
 400                 smb_msg.msg_controllen = 0;
 401                 length =
 402                     kernel_recvmsg(csocket, &smb_msg,
 403                                  &iov, 1, 4, 0 /* BB see socket.h flags */);
 404
 405                 if ( kthread_should_stop() ) {
 406                         break;
 407                 } else if (server->tcpStatus == CifsNeedReconnect) {
 408                         cFYI(1, ("Reconnect after server stopped responding"));
 409                         cifs_reconnect(server);
 410                         cFYI(1, ("call to reconnect done"));
 411                         csocket = server->ssocket;
 412                         continue;
 413                 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
 414                         msleep(1); /* minimum sleep to prevent looping
 415                                 allowing socket to clear and app threads to set
 416                                 tcpStatus CifsNeedReconnect if server hung */
 417                         continue;
 418                 } else if (length <= 0) {
 419                         if (server->tcpStatus == CifsNew) {
 420                                 cFYI(1, ("tcp session abend after SMBnegprot"));
 421                                 /* some servers kill the TCP session rather than
 422                                    returning an SMB negprot error, in which
 423                                    case reconnecting here is not going to help,
 424                                    and so simply return error to mount */
 425                                 break;
 426                         }
 427                         if (!try_to_freeze() && (length == -EINTR)) {
 428                                 cFYI(1, ("cifsd thread killed"));
 429                                 break;
 430                         }
 431                         cFYI(1, ("Reconnect after unexpected peek error %d",
 432                                 length));
 433                         cifs_reconnect(server);
 434                         csocket = server->ssocket;
 435                         wake_up(&server->response_q);
 436                         continue;
 437                 } else if (length < 4) {
 438                         cFYI(1,
 439                             ("Frame under four bytes received (%d bytes long)",
 440                               length));
 441                         cifs_reconnect(server);
 442                         csocket = server->ssocket;
 443                         wake_up(&server->response_q);
 444                         continue;
 445                 }
 446
 447                 /* The right amount was read from socket - 4 bytes */
 448                 /* so we can now interpret the length field */
 449
 450                 /* the first byte big endian of the length field,
 451                 is actually not part of the length but the type
 452                 with the most common, zero, as regular data */
 453                 temp = *((char *) smb_buffer);
 454
 455                 /* Note that FC 1001 length is big endian on the wire,
 456                 but we convert it here so it is always manipulated
 457                 as host byte order */
 458                 pdu_length = ntohl(smb_buffer->smb_buf_length);
 459                 smb_buffer->smb_buf_length = pdu_length;
 460
 461                 cFYI(1, ("rfc1002 length 0x%x", pdu_length+4));
 462
 463                 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
 464                         continue;
 465                 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
 466                         cFYI(1, ("Good RFC 1002 session rsp"));
 467                         continue;
 468                 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
 469                         /* we get this from Windows 98 instead of
 470                            an error on SMB negprot response */
 471                         cFYI(1,("Negative RFC1002 Session Response Error 0x%x)",
 472                                 pdu_length));
 473                         if(server->tcpStatus == CifsNew) {
 474                                 /* if nack on negprot (rather than
 475                                 ret of smb negprot error) reconnecting
 476                                 not going to help, ret error to mount */
 477                                 break;
 478                         } else {
 479                                 /* give server a second to
 480                                 clean up before reconnect attempt */
 481                                 msleep(1000);
 482                                 /* always try 445 first on reconnect
 483                                 since we get NACK on some if we ever
 484                                 connected to port 139 (the NACK is
 485                                 since we do not begin with RFC1001
 486                                 session initialize frame) */
 487                                 server->addr.sockAddr.sin_port =
 488                                         htons(CIFS_PORT);
 489                                 cifs_reconnect(server);
 490                                 csocket = server->ssocket;
 491                                 wake_up(&server->response_q);
 492                                 continue;
 493                         }
 494                 } else if (temp != (char) 0) {
 495                         cERROR(1,("Unknown RFC 1002 frame"));
 496                         cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
 497                                       length);
 498                         cifs_reconnect(server);
 499                         csocket = server->ssocket;
 500                         continue;
 501                 }
 502
 503                 /* else we have an SMB response */
 504                 if((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
 505                             (pdu_length < sizeof (struct smb_hdr) - 1 - 4)) {
 506                         cERROR(1, ("Invalid size SMB length %d pdu_length %d",
 507                                         length, pdu_length+4));
 508                         cifs_reconnect(server);
 509                         csocket = server->ssocket;
 510                         wake_up(&server->response_q);
 511                         continue;
 512                 }
 513
 514                 /* else length ok */
 515                 reconnect = 0;
 516
 517                 if(pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
 518                         isLargeBuf = TRUE;
 519                         memcpy(bigbuf, smallbuf, 4);
 520                         smb_buffer = bigbuf;
 521                 }
 522                 length = 0;
 523                 iov.iov_base = 4 + (char *)smb_buffer;
 524                 iov.iov_len = pdu_length;
 525                 for (total_read = 0; total_read < pdu_length;
 526                      total_read += length) {
 527                         length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
 528                                                 pdu_length - total_read, 0);
 529                         if( kthread_should_stop() ||
 530                             (length == -EINTR)) {
 531                                 /* then will exit */
 532                                 reconnect = 2;
 533                                 break;
 534                         } else if (server->tcpStatus == CifsNeedReconnect) {
 535                                 cifs_reconnect(server);
 536                                 csocket = server->ssocket;
 537                                 /* Reconnect wakes up rspns q */
 538                                 /* Now we will reread sock */
 539                                 reconnect = 1;
 540                                 break;
 541                         } else if ((length == -ERESTARTSYS) ||
 542                                    (length == -EAGAIN)) {
 543                                 msleep(1); /* minimum sleep to prevent looping,
 544                                               allowing socket to clear and app
 545                                               threads to set tcpStatus
 546                                               CifsNeedReconnect if server hung*/
 547                                 continue;
 548                         } else if (length <= 0) {
 549                                 cERROR(1,("Received no data, expecting %d",
 550                                               pdu_length - total_read));
 551                                 cifs_reconnect(server);
 552                                 csocket = server->ssocket;
 553                                 reconnect = 1;
 554                                 break;
 555                         }
 556                 }
 557                 if(reconnect == 2)
 558                         break;
 559                 else if(reconnect == 1)
 560                         continue;
 561
 562                 length += 4; /* account for rfc1002 hdr */
 563
 564
 565                 dump_smb(smb_buffer, length);
 566                 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
 567                         cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
 568                         continue;
 569                 }
 570
 571
 572                 task_to_wake = NULL;
 573                 spin_lock(&GlobalMid_Lock);
 574                 list_for_each(tmp, &server->pending_mid_q) {
 575                         mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 576
 577                         if ((mid_entry->mid == smb_buffer->Mid) &&
 578                             (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
 579                             (mid_entry->command == smb_buffer->Command)) {
 580                                 if(check2ndT2(smb_buffer,server->maxBuf) > 0) {
 581                                         /* We have a multipart transact2 resp */
 582                                         isMultiRsp = TRUE;
 583                                         if(mid_entry->resp_buf) {
 584                                                 /* merge response - fix up 1st*/
 585                                                 if(coalesce_t2(smb_buffer,
 586                                                         mid_entry->resp_buf)) {
 587                                                         mid_entry->multiRsp = 1;
 588                                                         break;
 589                                                 } else {
 590                                                         /* all parts received */
 591                                                         mid_entry->multiEnd = 1;
 592                                                         goto multi_t2_fnd;
 593                                                 }
 594                                         } else {
 595                                                 if(!isLargeBuf) {
 596                                                         cERROR(1,("1st trans2 resp needs bigbuf"));
 597                                         /* BB maybe we can fix this up,  switch
 598                                            to already allocated large buffer? */
 599                                                 } else {
 600                                                         /* Have first buffer */
 601                                                         mid_entry->resp_buf =
 602                                                                  smb_buffer;
 603                                                         mid_entry->largeBuf = 1;
 604                                                         bigbuf = NULL;
 605                                                 }
 606                                         }
 607                                         break;
 608                                 }
 609                                 mid_entry->resp_buf = smb_buffer;
 610                                 if(isLargeBuf)
 611                                         mid_entry->largeBuf = 1;
 612                                 else
 613                                         mid_entry->largeBuf = 0;
 614 multi_t2_fnd:
 615                                 task_to_wake = mid_entry->tsk;
 616                                 mid_entry->midState = MID_RESPONSE_RECEIVED;
 617 #ifdef CONFIG_CIFS_STATS2
 618                                 mid_entry->when_received = jiffies;
 619 #endif
 620                                 /* so we do not time out requests to  server
 621                                 which is still responding (since server could
 622                                 be busy but not dead) */
 623                                 server->lstrp = jiffies;
 624                                 break;
 625                         }
 626                 }
 627                 spin_unlock(&GlobalMid_Lock);
 628                 if (task_to_wake) {
 629                         /* Was previous buf put in mpx struct for multi-rsp? */
 630                         if(!isMultiRsp) {
 631                                 /* smb buffer will be freed by user thread */
 632                                 if(isLargeBuf) {
 633                                         bigbuf = NULL;
 634                                 } else
 635                                         smallbuf = NULL;
 636                         }
 637                         wake_up_process(task_to_wake);
 638                 } else if ((is_valid_oplock_break(smb_buffer, server) == FALSE)
 639                     && (isMultiRsp == FALSE)) {
 640                         cERROR(1, ("No task to wake, unknown frame rcvd! NumMids %d", midCount.counter));
 641                         cifs_dump_mem("Received Data is: ",(char *)smb_buffer,
 642                                       sizeof(struct smb_hdr));
 643 #ifdef CONFIG_CIFS_DEBUG2
 644                         cifs_dump_detail(smb_buffer);
 645                         cifs_dump_mids(server);
 646 #endif /* CIFS_DEBUG2 */
 647
 648                 }
 649         } /* end while !EXITING */
 650
 651         spin_lock(&GlobalMid_Lock);
 652         server->tcpStatus = CifsExiting;
 653         server->tsk = NULL;
 654         /* check if we have blocked requests that need to free */
 655         /* Note that cifs_max_pending is normally 50, but
 656         can be set at module install time to as little as two */
 657         if(atomic_read(&server->inFlight) >= cifs_max_pending)
 658                 atomic_set(&server->inFlight, cifs_max_pending - 1);
 659         /* We do not want to set the max_pending too low or we
 660         could end up with the counter going negative */
 661         spin_unlock(&GlobalMid_Lock);
 662         /* Although there should not be any requests blocked on
 663         this queue it can not hurt to be paranoid and try to wake up requests
 664         that may haven been blocked when more than 50 at time were on the wire
 665         to the same server - they now will see the session is in exit state
 666         and get out of SendReceive.  */
 667         wake_up_all(&server->request_q);
 668         /* give those requests time to exit */
 669         msleep(125);
 670
 671         if(server->ssocket) {
 672                 sock_release(csocket);
 673                 server->ssocket = NULL;
 674         }
 675         /* buffer usuallly freed in free_mid - need to free it here on exit */
 676         if (bigbuf != NULL)
 677                 cifs_buf_release(bigbuf);
 678         if (smallbuf != NULL)
 679                 cifs_small_buf_release(smallbuf);
 680
 681         read_lock(&GlobalSMBSeslock);
 682         if (list_empty(&server->pending_mid_q)) {
 683                 /* loop through server session structures attached to this and
 684                     mark them dead */
 685                 list_for_each(tmp, &GlobalSMBSessionList) {
 686                         ses =
 687                             list_entry(tmp, struct cifsSesInfo,
 688                                        cifsSessionList);
 689                         if (ses->server == server) {
 690                                 ses->status = CifsExiting;
 691                                 ses->server = NULL;
 692                         }
 693                 }
 694                 read_unlock(&GlobalSMBSeslock);
 695         } else {
 696                 /* although we can not zero the server struct pointer yet,
 697                 since there are active requests which may depnd on them,
 698                 mark the corresponding SMB sessions as exiting too */
 699                 list_for_each(tmp, &GlobalSMBSessionList) {
 700                         ses = list_entry(tmp, struct cifsSesInfo,
 701                                          cifsSessionList);
 702                         if (ses->server == server) {
 703                                 ses->status = CifsExiting;
 704                         }
 705                 }
 706
 707                 spin_lock(&GlobalMid_Lock);
 708                 list_for_each(tmp, &server->pending_mid_q) {
 709                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 710                         if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
 711                                 cFYI(1,
 712                                   ("Clearing Mid 0x%x - waking up ",mid_entry->mid));
 713                                 task_to_wake = mid_entry->tsk;
 714                                 if(task_to_wake) {
 715                                         wake_up_process(task_to_wake);
 716                                 }
 717                         }
 718                 }
 719                 spin_unlock(&GlobalMid_Lock);
 720                 read_unlock(&GlobalSMBSeslock);
 721                 /* 1/8th of sec is more than enough time for them to exit */
 722                 msleep(125);
 723         }
 724
 725         if (!list_empty(&server->pending_mid_q)) {
 726                 /* mpx threads have not exited yet give them
 727                 at least the smb send timeout time for long ops */
 728                 /* due to delays on oplock break requests, we need
 729                 to wait at least 45 seconds before giving up
 730                 on a request getting a response and going ahead
 731                 and killing cifsd */
 732                 cFYI(1, ("Wait for exit from demultiplex thread"));
 733                 msleep(46000);
 734                 /* if threads still have not exited they are probably never
 735                 coming home not much else we can do but free the memory */
 736         }
 737
 738         write_lock(&GlobalSMBSeslock);
 739         atomic_dec(&tcpSesAllocCount);
 740         length = tcpSesAllocCount.counter;
 741
 742         /* last chance to mark ses pointers invalid
 743         if there are any pointing to this (e.g
 744         if a crazy root user tried to kill cifsd
 745         kernel thread explicitly this might happen) */
 746         list_for_each(tmp, &GlobalSMBSessionList) {
 747                 ses = list_entry(tmp, struct cifsSesInfo,
 748                                 cifsSessionList);
 749                 if (ses->server == server) {
 750                         ses->server = NULL;
 751                 }
 752         }
 753         write_unlock(&GlobalSMBSeslock);
 754
 755         kfree(server);
 756         if(length  > 0) {
 757                 mempool_resize(cifs_req_poolp,
 758                         length + cifs_min_rcv,
 759                         GFP_KERNEL);
 760         }
 761
 762         return 0;
 763 }
 764
 765 static int
 766 cifs_parse_mount_options(char *options, const char *devname,struct smb_vol *vol)
 767 {
 768         char *value;
 769         char *data;
 770         unsigned int  temp_len, i, j;
 771         char separator[2];
 772
 773         separator[0] = ',';
 774         separator[1] = 0;
 775
 776         if (Local_System_Name[0] != 0)
 777                 memcpy(vol->source_rfc1001_name, Local_System_Name,15);
 778         else {
 779                 char *nodename = utsname()->nodename;
 780                 int n = strnlen(nodename,15);
 781                 memset(vol->source_rfc1001_name,0x20,15);
 782                 for(i=0 ; i < n ; i++) {
 783                         /* does not have to be perfect mapping since field is
 784                         informational, only used for servers that do not support
 785                         port 445 and it can be overridden at mount time */
 786                         vol->source_rfc1001_name[i] = toupper(nodename[i]);
 787                 }
 788         }
 789         vol->source_rfc1001_name[15] = 0;
 790         /* null target name indicates to use *SMBSERVR default called name
 791            if we end up sending RFC1001 session initialize */
 792         vol->target_rfc1001_name[0] = 0;
 793         vol->linux_uid = current->uid;  /* current->euid instead? */
 794         vol->linux_gid = current->gid;
 795         vol->dir_mode = S_IRWXUGO;
 796         /* 2767 perms indicate mandatory locking support */
 797         vol->file_mode = S_IALLUGO & ~(S_ISUID | S_IXGRP);
 798
 799         /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
 800         vol->rw = TRUE;
 801         /* default is always to request posix paths. */
 802         vol->posix_paths = 1;
 803
 804         if (!options)
 805                 return 1;
 806
 807         if(strncmp(options,"sep=",4) == 0) {
 808                 if(options[4] != 0) {
 809                         separator[0] = options[4];
 810                         options += 5;
 811                 } else {
 812                         cFYI(1, ("Null separator not allowed"));
 813                 }
 814         }
 815
 816         while ((data = strsep(&options, separator)) != NULL) {
 817                 if (!*data)
 818                         continue;
 819                 if ((value = strchr(data, '=')) != NULL)
 820                         *value++ = '\0';
 821
 822                 if (strnicmp(data, "user_xattr",10) == 0) {/*parse before user*/
 823                         vol->no_xattr = 0;
 824                 } else if (strnicmp(data, "nouser_xattr",12) == 0) {
 825                         vol->no_xattr = 1;
 826                 } else if (strnicmp(data, "user", 4) == 0) {
 827                         if (!value) {
 828                                 printk(KERN_WARNING
 829                                        "CIFS: invalid or missing username\n");
 830                                 return 1;       /* needs_arg; */
 831                         } else if(!*value) {
 832                                 /* null user, ie anonymous, authentication */
 833                                 vol->nullauth = 1;
 834                         }
 835                         if (strnlen(value, 200) < 200) {
 836                                 vol->username = value;
 837                         } else {
 838                                 printk(KERN_WARNING "CIFS: username too long\n");
 839                                 return 1;
 840                         }
 841                 } else if (strnicmp(data, "pass", 4) == 0) {
 842                         if (!value) {
 843                                 vol->password = NULL;
 844                                 continue;
 845                         } else if(value[0] == 0) {
 846                                 /* check if string begins with double comma
 847                                    since that would mean the password really
 848                                    does start with a comma, and would not
 849                                    indicate an empty string */
 850                                 if(value[1] != separator[0]) {
 851                                         vol->password = NULL;
 852                                         continue;
 853                                 }
 854                         }
 855                         temp_len = strlen(value);
 856                         /* removed password length check, NTLM passwords
 857                                 can be arbitrarily long */
 858
 859                         /* if comma in password, the string will be
 860                         prematurely null terminated.  Commas in password are
 861                         specified across the cifs mount interface by a double
 862                         comma ie ,, and a comma used as in other cases ie ','
 863                         as a parameter delimiter/separator is single and due
 864                         to the strsep above is temporarily zeroed. */
 865
 866                         /* NB: password legally can have multiple commas and
 867                         the only illegal character in a password is null */
 868
 869                         if ((value[temp_len] == 0) &&
 870                             (value[temp_len+1] == separator[0])) {
 871                                 /* reinsert comma */
 872                                 value[temp_len] = separator[0];
 873                                 temp_len+=2;  /* move after the second comma */
 874                                 while(value[temp_len] != 0)  {
 875                                         if (value[temp_len] == separator[0]) {
 876                                                 if (value[temp_len+1] ==
 877                                                      separator[0]) {
 878                                                 /* skip second comma */
 879                                                         temp_len++;
 880                                                 } else {
 881                                                 /* single comma indicating start
 882                                                          of next parm */
 883                                                         break;
 884                                                 }
 885                                         }
 886                                         temp_len++;
 887                                 }
 888                                 if(value[temp_len] == 0) {
 889                                         options = NULL;
 890                                 } else {
 891                                         value[temp_len] = 0;
 892                                         /* point option to start of next parm */
 893                                         options = value + temp_len + 1;
 894                                 }
 895                                 /* go from value to value + temp_len condensing
 896                                 double commas to singles. Note that this ends up
 897                                 allocating a few bytes too many, which is ok */
 898                                 vol->password = kzalloc(temp_len, GFP_KERNEL);
 899                                 if(vol->password == NULL) {
 900                                         printk("CIFS: no memory for pass\n");
 901                                         return 1;
 902                                 }
 903                                 for(i=0,j=0;i<temp_len;i++,j++) {
 904                                         vol->password[j] = value[i];
 905                                         if(value[i] == separator[0]
 906                                                 && value[i+1] == separator[0]) {
 907                                                 /* skip second comma */
 908                                                 i++;
 909                                         }
 910                                 }
 911                                 vol->password[j] = 0;
 912                         } else {
 913                                 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
 914                                 if(vol->password == NULL) {
 915                                         printk("CIFS: no memory for pass\n");
 916                                         return 1;
 917                                 }
 918                                 strcpy(vol->password, value);
 919                         }
 920                 } else if (strnicmp(data, "ip", 2) == 0) {
 921                         if (!value || !*value) {
 922                                 vol->UNCip = NULL;
 923                         } else if (strnlen(value, 35) < 35) {
 924                                 vol->UNCip = value;
 925                         } else {
 926                                 printk(KERN_WARNING "CIFS: ip address too long\n");
 927                                 return 1;
 928                         }
 929                 } else if (strnicmp(data, "sec", 3) == 0) {
 930                         if (!value || !*value) {
 931                                 cERROR(1,("no security value specified"));
 932                                 continue;
 933                         } else if (strnicmp(value, "krb5i", 5) == 0) {
 934                                 vol->secFlg |= CIFSSEC_MAY_KRB5 |
 935                                         CIFSSEC_MUST_SIGN;
 936                         } else if (strnicmp(value, "krb5p", 5) == 0) {
 937                                 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
 938                                         CIFSSEC_MAY_KRB5; */
 939                                 cERROR(1,("Krb5 cifs privacy not supported"));
 940                                 return 1;
 941                         } else if (strnicmp(value, "krb5", 4) == 0) {
 942                                 vol->secFlg |= CIFSSEC_MAY_KRB5;
 943                         } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
 944                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
 945                                         CIFSSEC_MUST_SIGN;
 946                         } else if (strnicmp(value, "ntlmv2", 6) == 0) {
 947                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
 948                         } else if (strnicmp(value, "ntlmi", 5) == 0) {
 949                                 vol->secFlg |= CIFSSEC_MAY_NTLM |
 950                                         CIFSSEC_MUST_SIGN;
 951                         } else if (strnicmp(value, "ntlm", 4) == 0) {
 952                                 /* ntlm is default so can be turned off too */
 953                                 vol->secFlg |= CIFSSEC_MAY_NTLM;
 954                         } else if (strnicmp(value, "nontlm", 6) == 0) {
 955                                 /* BB is there a better way to do this? */
 956                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
 957 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 958                         } else if (strnicmp(value, "lanman", 6) == 0) {
 959                                 vol->secFlg |= CIFSSEC_MAY_LANMAN;
 960 #endif
 961                         } else if (strnicmp(value, "none", 4) == 0) {
 962                                 vol->nullauth = 1;
 963                         } else {
 964                                 cERROR(1,("bad security option: %s", value));
 965                                 return 1;
 966                         }
 967                 } else if ((strnicmp(data, "unc", 3) == 0)
 968                            || (strnicmp(data, "target", 6) == 0)
 969                            || (strnicmp(data, "path", 4) == 0)) {
 970                         if (!value || !*value) {
 971                                 printk(KERN_WARNING
 972                                        "CIFS: invalid path to network resource\n");
 973                                 return 1;       /* needs_arg; */
 974                         }
 975                         if ((temp_len = strnlen(value, 300)) < 300) {
 976                                 vol->UNC = kmalloc(temp_len+1,GFP_KERNEL);
 977                                 if (vol->UNC == NULL)
 978                                         return 1;
 979                                 strcpy(vol->UNC,value);
 980                                 if (strncmp(vol->UNC, "//", 2) == 0) {
 981                                         vol->UNC[0] = '\\';
 982                                         vol->UNC[1] = '\\';
 983                                 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
 984                                         printk(KERN_WARNING
 985                                                "CIFS: UNC Path does not begin with // or \\\\ \n");
 986                                         return 1;
 987                                 }
 988                         } else {
 989                                 printk(KERN_WARNING "CIFS: UNC name too long\n");
 990                                 return 1;
 991                         }
 992                 } else if ((strnicmp(data, "domain", 3) == 0)
 993                            || (strnicmp(data, "workgroup", 5) == 0)) {
 994                         if (!value || !*value) {
 995                                 printk(KERN_WARNING "CIFS: invalid domain name\n");
 996                                 return 1;       /* needs_arg; */
 997                         }
 998                         /* BB are there cases in which a comma can be valid in
 999                         a domain name and need special handling? */
1000                         if (strnlen(value, 256) < 256) {
1001                                 vol->domainname = value;
1002                                 cFYI(1, ("Domain name set"));
1003                         } else {
1004                                 printk(KERN_WARNING "CIFS: domain name too long\n");
1005                                 return 1;
1006                         }
1007                 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1008                         if (!value || !*value) {
1009                                 printk(KERN_WARNING
1010                                        "CIFS: invalid path prefix\n");
1011                                 return 1;       /* needs_arg; */
1012                         }
1013                         if ((temp_len = strnlen(value, 1024)) < 1024) {
1014                                 if (value[0] != '/')
1015                                         temp_len++;  /* missing leading slash */
1016                                 vol->prepath = kmalloc(temp_len+1,GFP_KERNEL);
1017                                 if (vol->prepath == NULL)
1018                                         return 1;
1019                                 if (value[0] != '/') {
1020                                         vol->prepath[0] = '/';
1021                                         strcpy(vol->prepath+1,value);
1022                                 } else
1023                                         strcpy(vol->prepath,value);
1024                                 cFYI(1, ("prefix path %s",vol->prepath));
1025                         } else {
1026                                 printk(KERN_WARNING "CIFS: prefix too long\n");
1027                                 return 1;
1028                         }
1029                 } else if (strnicmp(data, "iocharset", 9) == 0) {
1030                         if (!value || !*value) {
1031                                 printk(KERN_WARNING "CIFS: invalid iocharset specified\n");
1032                                 return 1;       /* needs_arg; */
1033                         }
1034                         if (strnlen(value, 65) < 65) {
1035                                 if (strnicmp(value,"default",7))
1036                                         vol->iocharset = value;
1037                                 /* if iocharset not set load_nls_default used by caller */
1038                                 cFYI(1, ("iocharset set to %s",value));
1039                         } else {
1040                                 printk(KERN_WARNING "CIFS: iocharset name too long.\n");
1041                                 return 1;
1042                         }
1043                 } else if (strnicmp(data, "uid", 3) == 0) {
1044                         if (value && *value) {
1045                                 vol->linux_uid =
1046                                         simple_strtoul(value, &value, 0);
1047                                 vol->override_uid = 1;
1048                         }
1049                 } else if (strnicmp(data, "gid", 3) == 0) {
1050                         if (value && *value) {
1051                                 vol->linux_gid =
1052                                         simple_strtoul(value, &value, 0);
1053                                 vol->override_gid = 1;
1054                         }
1055                 } else if (strnicmp(data, "file_mode", 4) == 0) {
1056                         if (value && *value) {
1057                                 vol->file_mode =
1058                                         simple_strtoul(value, &value, 0);
1059                         }
1060                 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1061                         if (value && *value) {
1062                                 vol->dir_mode =
1063                                         simple_strtoul(value, &value, 0);
1064                         }
1065                 } else if (strnicmp(data, "dirmode", 4) == 0) {
1066                         if (value && *value) {
1067                                 vol->dir_mode =
1068                                         simple_strtoul(value, &value, 0);
1069                         }
1070                 } else if (strnicmp(data, "port", 4) == 0) {
1071                         if (value && *value) {
1072                                 vol->port =
1073                                         simple_strtoul(value, &value, 0);
1074                         }
1075                 } else if (strnicmp(data, "rsize", 5) == 0) {
1076                         if (value && *value) {
1077                                 vol->rsize =
1078                                         simple_strtoul(value, &value, 0);
1079                         }
1080                 } else if (strnicmp(data, "wsize", 5) == 0) {
1081                         if (value && *value) {
1082                                 vol->wsize =
1083                                         simple_strtoul(value, &value, 0);
1084                         }
1085                 } else if (strnicmp(data, "sockopt", 5) == 0) {
1086                         if (value && *value) {
1087                                 vol->sockopt =
1088                                         simple_strtoul(value, &value, 0);
1089                         }
1090                 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1091                         if (!value || !*value || (*value == ' ')) {
1092                                 cFYI(1,("invalid (empty) netbiosname specified"));
1093                         } else {
1094                                 memset(vol->source_rfc1001_name,0x20,15);
1095                                 for(i=0;i<15;i++) {
1096                                 /* BB are there cases in which a comma can be
1097                                 valid in this workstation netbios name (and need
1098                                 special handling)? */
1099
1100                                 /* We do not uppercase netbiosname for user */
1101                                         if (value[i]==0)
1102                                                 break;
1103                                         else
1104                                                 vol->source_rfc1001_name[i] = value[i];
1105                                 }
1106                                 /* The string has 16th byte zero still from
1107                                 set at top of the function  */
1108                                 if ((i==15) && (value[i] != 0))
1109                                         printk(KERN_WARNING "CIFS: netbiosname longer than 15 truncated.\n");
1110                         }
1111                 } else if (strnicmp(data, "servern", 7) == 0) {
1112                         /* servernetbiosname specified override *SMBSERVER */
1113                         if (!value || !*value || (*value == ' ')) {
1114                                 cFYI(1, ("empty server netbiosname specified"));
1115                         } else {
1116                                 /* last byte, type, is 0x20 for servr type */
1117                                 memset(vol->target_rfc1001_name,0x20,16);
1118
1119                                 for(i=0;i<15;i++) {
1120                                 /* BB are there cases in which a comma can be
1121                                    valid in this workstation netbios name (and need
1122                                    special handling)? */
1123
1124                                 /* user or mount helper must uppercase netbiosname */
1125                                         if (value[i]==0)
1126                                                 break;
1127                                         else
1128                                                 vol->target_rfc1001_name[i] = value[i];
1129                                 }
1130                                 /* The string has 16th byte zero still from
1131                                    set at top of the function  */
1132                                 if ((i==15) && (value[i] != 0))
1133                                         printk(KERN_WARNING "CIFS: server netbiosname longer than 15 truncated.\n");
1134                         }
1135                 } else if (strnicmp(data, "credentials", 4) == 0) {
1136                         /* ignore */
1137                 } else if (strnicmp(data, "version", 3) == 0) {
1138                         /* ignore */
1139                 } else if (strnicmp(data, "guest",5) == 0) {
1140                         /* ignore */
1141                 } else if (strnicmp(data, "rw", 2) == 0) {
1142                         vol->rw = TRUE;
1143                 } else if ((strnicmp(data, "suid", 4) == 0) ||
1144                                    (strnicmp(data, "nosuid", 6) == 0) ||
1145                                    (strnicmp(data, "exec", 4) == 0) ||
1146                                    (strnicmp(data, "noexec", 6) == 0) ||
1147                                    (strnicmp(data, "nodev", 5) == 0) ||
1148                                    (strnicmp(data, "noauto", 6) == 0) ||
1149                                    (strnicmp(data, "dev", 3) == 0)) {
1150                         /*  The mount tool or mount.cifs helper (if present)
1151                                 uses these opts to set flags, and the flags are read
1152                                 by the kernel vfs layer before we get here (ie
1153                                 before read super) so there is no point trying to
1154                                 parse these options again and set anything and it
1155                                 is ok to just ignore them */
1156                         continue;
1157                 } else if (strnicmp(data, "ro", 2) == 0) {
1158                         vol->rw = FALSE;
1159                 } else if (strnicmp(data, "hard", 4) == 0) {
1160                         vol->retry = 1;
1161                 } else if (strnicmp(data, "soft", 4) == 0) {
1162                         vol->retry = 0;
1163                 } else if (strnicmp(data, "perm", 4) == 0) {
1164                         vol->noperm = 0;
1165                 } else if (strnicmp(data, "noperm", 6) == 0) {
1166                         vol->noperm = 1;
1167                 } else if (strnicmp(data, "mapchars", 8) == 0) {
1168                         vol->remap = 1;
1169                 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1170                         vol->remap = 0;
1171                 } else if (strnicmp(data, "sfu", 3) == 0) {
1172                         vol->sfu_emul = 1;
1173                 } else if (strnicmp(data, "nosfu", 5) == 0) {
1174                         vol->sfu_emul = 0;
1175                 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1176                         vol->posix_paths = 1;
1177                 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1178                         vol->posix_paths = 0;
1179                 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1180                            (strnicmp(data, "ignorecase", 10)  == 0)) {
1181                         vol->nocase = 1;
1182                 } else if (strnicmp(data, "brl", 3) == 0) {
1183                         vol->nobrl =  0;
1184                 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1185                            (strnicmp(data, "nolock", 6) == 0)) {
1186                         vol->nobrl =  1;
1187                         /* turn off mandatory locking in mode
1188                         if remote locking is turned off since the
1189                         local vfs will do advisory */
1190                         if(vol->file_mode == (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1191                                 vol->file_mode = S_IALLUGO;
1192                 } else if (strnicmp(data, "setuids", 7) == 0) {
1193                         vol->setuids = 1;
1194                 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1195                         vol->setuids = 0;
1196                 } else if (strnicmp(data, "nohard", 6) == 0) {
1197                         vol->retry = 0;
1198                 } else if (strnicmp(data, "nosoft", 6) == 0) {
1199                         vol->retry = 1;
1200                 } else if (strnicmp(data, "nointr", 6) == 0) {
1201                         vol->intr = 0;
1202                 } else if (strnicmp(data, "intr", 4) == 0) {
1203                         vol->intr = 1;
1204                 } else if (strnicmp(data, "serverino",7) == 0) {
1205                         vol->server_ino = 1;
1206                 } else if (strnicmp(data, "noserverino",9) == 0) {
1207                         vol->server_ino = 0;
1208                 } else if (strnicmp(data, "cifsacl",7) == 0) {
1209                         vol->cifs_acl = 1;
1210                 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1211                         vol->cifs_acl = 0;
1212                 } else if (strnicmp(data, "acl",3) == 0) {
1213                         vol->no_psx_acl = 0;
1214                 } else if (strnicmp(data, "noacl",5) == 0) {
1215                         vol->no_psx_acl = 1;
1216                 } else if (strnicmp(data, "sign",4) == 0) {
1217                         vol->secFlg |= CIFSSEC_MUST_SIGN;
1218 /*              } else if (strnicmp(data, "seal",4) == 0) {
1219                         vol->secFlg |= CIFSSEC_MUST_SEAL; */
1220                 } else if (strnicmp(data, "direct",6) == 0) {
1221                         vol->direct_io = 1;
1222                 } else if (strnicmp(data, "forcedirectio",13) == 0) {
1223                         vol->direct_io = 1;
1224                 } else if (strnicmp(data, "in6_addr",8) == 0) {
1225                         if (!value || !*value) {
1226                                 vol->in6_addr = NULL;
1227                         } else if (strnlen(value, 49) == 48) {
1228                                 vol->in6_addr = value;
1229                         } else {
1230                                 printk(KERN_WARNING "CIFS: ip v6 address not 48 characters long\n");
1231                                 return 1;
1232                         }
1233                 } else if (strnicmp(data, "noac", 4) == 0) {
1234                         printk(KERN_WARNING "CIFS: Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n");
1235                 } else
1236                         printk(KERN_WARNING "CIFS: Unknown mount option %s\n",data);
1237         }
1238         if (vol->UNC == NULL) {
1239                 if (devname == NULL) {
1240                         printk(KERN_WARNING "CIFS: Missing UNC name for mount target\n");
1241                         return 1;
1242                 }
1243                 if ((temp_len = strnlen(devname, 300)) < 300) {
1244                         vol->UNC = kmalloc(temp_len+1,GFP_KERNEL);
1245                         if (vol->UNC == NULL)
1246                                 return 1;
1247                         strcpy(vol->UNC,devname);
1248                         if (strncmp(vol->UNC, "//", 2) == 0) {
1249                                 vol->UNC[0] = '\\';
1250                                 vol->UNC[1] = '\\';
1251                         } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1252                                 printk(KERN_WARNING "CIFS: UNC Path does not begin with // or \\\\ \n");
1253                                 return 1;
1254                         }
1255                 } else {
1256                         printk(KERN_WARNING "CIFS: UNC name too long\n");
1257                         return 1;
1258                 }
1259         }
1260         if(vol->UNCip == NULL)
1261                 vol->UNCip = &vol->UNC[2];
1262
1263         return 0;
1264 }
1265
1266 static struct cifsSesInfo *
1267 cifs_find_tcp_session(struct in_addr * target_ip_addr,
1268                 struct in6_addr *target_ip6_addr,
1269                  char *userName, struct TCP_Server_Info **psrvTcp)
1270 {
1271         struct list_head *tmp;
1272         struct cifsSesInfo *ses;
1273         *psrvTcp = NULL;
1274         read_lock(&GlobalSMBSeslock);
1275
1276         list_for_each(tmp, &GlobalSMBSessionList) {
1277                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
1278                 if (ses->server) {
1279                         if((target_ip_addr &&
1280                                 (ses->server->addr.sockAddr.sin_addr.s_addr
1281                                   == target_ip_addr->s_addr)) || (target_ip6_addr
1282                                 && memcmp(&ses->server->addr.sockAddr6.sin6_addr,
1283                                         target_ip6_addr,sizeof(*target_ip6_addr)))){
1284                                 /* BB lock server and tcp session and increment use count here?? */
1285                                 *psrvTcp = ses->server; /* found a match on the TCP session */
1286                                 /* BB check if reconnection needed */
1287                                 if (strncmp
1288                                     (ses->userName, userName,
1289                                      MAX_USERNAME_SIZE) == 0){
1290                                         read_unlock(&GlobalSMBSeslock);
1291                                         return ses;     /* found exact match on both tcp and SMB sessions */
1292                                 }
1293                         }
1294                 }
1295                 /* else tcp and smb sessions need reconnection */
1296         }
1297         read_unlock(&GlobalSMBSeslock);
1298         return NULL;
1299 }
1300
1301 static struct cifsTconInfo *
1302 find_unc(__be32 new_target_ip_addr, char *uncName, char *userName)
1303 {
1304         struct list_head *tmp;
1305         struct cifsTconInfo *tcon;
1306
1307         read_lock(&GlobalSMBSeslock);
1308         list_for_each(tmp, &GlobalTreeConnectionList) {
1309                 cFYI(1, ("Next tcon"));
1310                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
1311                 if (tcon->ses) {
1312                         if (tcon->ses->server) {
1313                                 cFYI(1,
1314                                      ("old ip addr: %x == new ip %x ?",
1315                                       tcon->ses->server->addr.sockAddr.sin_addr.
1316                                       s_addr, new_target_ip_addr));
1317                                 if (tcon->ses->server->addr.sockAddr.sin_addr.
1318                                     s_addr == new_target_ip_addr) {
1319         /* BB lock tcon, server and tcp session and increment use count here? */
1320                                         /* found a match on the TCP session */
1321                                         /* BB check if reconnection needed */
1322                                         cFYI(1,("IP match, old UNC: %s new: %s",
1323                                               tcon->treeName, uncName));
1324                                         if (strncmp
1325                                             (tcon->treeName, uncName,
1326                                              MAX_TREE_SIZE) == 0) {
1327                                                 cFYI(1,
1328                                                      ("and old usr: %s new: %s",
1329                                                       tcon->treeName, uncName));
1330                                                 if (strncmp
1331                                                     (tcon->ses->userName,
1332                                                      userName,
1333                                                      MAX_USERNAME_SIZE) == 0) {
1334                                                         read_unlock(&GlobalSMBSeslock);
1335                                                         /* matched smb session
1336                                                         (user name */
1337                                                         return tcon;
1338                                                 }
1339                                         }
1340                                 }
1341                         }
1342                 }
1343         }
1344         read_unlock(&GlobalSMBSeslock);
1345         return NULL;
1346 }
1347
1348 int
1349 connect_to_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1350                     const char *old_path, const struct nls_table *nls_codepage,
1351                     int remap)
1352 {
1353         unsigned char *referrals = NULL;
1354         unsigned int num_referrals;
1355         int rc = 0;
1356
1357         rc = get_dfs_path(xid, pSesInfo,old_path, nls_codepage,
1358                         &num_referrals, &referrals, remap);
1359
1360         /* BB Add in code to: if valid refrl, if not ip address contact
1361                 the helper that resolves tcp names, mount to it, try to
1362                 tcon to it unmount it if fail */
1363
1364         kfree(referrals);
1365
1366         return rc;
1367 }
1368
1369 int
1370 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1371                         const char *old_path, const struct nls_table *nls_codepage,
1372                         unsigned int *pnum_referrals,
1373                         unsigned char ** preferrals, int remap)
1374 {
1375         char *temp_unc;
1376         int rc = 0;
1377
1378         *pnum_referrals = 0;
1379
1380         if (pSesInfo->ipc_tid == 0) {
1381                 temp_unc = kmalloc(2 /* for slashes */ +
1382                         strnlen(pSesInfo->serverName,SERVER_NAME_LEN_WITH_NULL * 2)
1383                                  + 1 + 4 /* slash IPC$ */  + 2,
1384                                 GFP_KERNEL);
1385                 if (temp_unc == NULL)
1386                         return -ENOMEM;
1387                 temp_unc[0] = '\\';
1388                 temp_unc[1] = '\\';
1389                 strcpy(temp_unc + 2, pSesInfo->serverName);
1390                 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1391                 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1392                 cFYI(1,
1393                      ("CIFS Tcon rc = %d ipc_tid = %d", rc,pSesInfo->ipc_tid));
1394                 kfree(temp_unc);
1395         }
1396         if (rc == 0)
1397                 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1398                                      pnum_referrals, nls_codepage, remap);
1399
1400         return rc;
1401 }
1402
1403 /* See RFC1001 section 14 on representation of Netbios names */
1404 static void rfc1002mangle(char * target,char * source, unsigned int length)
1405 {
1406         unsigned int i,j;
1407
1408         for(i=0,j=0;i<(length);i++) {
1409                 /* mask a nibble at a time and encode */
1410                 target[j] = 'A' + (0x0F & (source[i] >> 4));
1411                 target[j+1] = 'A' + (0x0F & source[i]);
1412                 j+=2;
1413         }
1414
1415 }
1416
1417
1418 static int
1419 ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
1420              char * netbios_name, char * target_name)
1421 {
1422         int rc = 0;
1423         int connected = 0;
1424         __be16 orig_port = 0;
1425
1426         if(*csocket == NULL) {
1427                 rc = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, csocket);
1428                 if (rc < 0) {
1429                         cERROR(1, ("Error %d creating socket",rc));
1430                         *csocket = NULL;
1431                         return rc;
1432                 } else {
1433                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1434                         cFYI(1, ("Socket created"));
1435                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1436                 }
1437         }
1438
1439         psin_server->sin_family = AF_INET;
1440         if(psin_server->sin_port) { /* user overrode default port */
1441                 rc = (*csocket)->ops->connect(*csocket,
1442                                 (struct sockaddr *) psin_server,
1443                                 sizeof (struct sockaddr_in),0);
1444                 if (rc >= 0)
1445                         connected = 1;
1446         }
1447
1448         if(!connected) {
1449                 /* save original port so we can retry user specified port
1450                         later if fall back ports fail this time  */
1451                 orig_port = psin_server->sin_port;
1452
1453                 /* do not retry on the same port we just failed on */
1454                 if(psin_server->sin_port != htons(CIFS_PORT)) {
1455                         psin_server->sin_port = htons(CIFS_PORT);
1456
1457                         rc = (*csocket)->ops->connect(*csocket,
1458                                         (struct sockaddr *) psin_server,
1459                                         sizeof (struct sockaddr_in),0);
1460                         if (rc >= 0)
1461                                 connected = 1;
1462                 }
1463         }
1464         if (!connected) {
1465                 psin_server->sin_port = htons(RFC1001_PORT);
1466                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1467                                               psin_server, sizeof (struct sockaddr_in),0);
1468                 if (rc >= 0)
1469                         connected = 1;
1470         }
1471
1472         /* give up here - unless we want to retry on different
1473                 protocol families some day */
1474         if (!connected) {
1475                 if(orig_port)
1476                         psin_server->sin_port = orig_port;
1477                 cFYI(1,("Error %d connecting to server via ipv4",rc));
1478                 sock_release(*csocket);
1479                 *csocket = NULL;
1480                 return rc;
1481         }
1482         /* Eventually check for other socket options to change from
1483                 the default. sock_setsockopt not used because it expects
1484                 user space buffer */
1485          cFYI(1,("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",(*csocket)->sk->sk_sndbuf,
1486                  (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
1487         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1488         /* make the bufsizes depend on wsize/rsize and max requests */
1489         if((*csocket)->sk->sk_sndbuf < (200 * 1024))
1490                 (*csocket)->sk->sk_sndbuf = 200 * 1024;
1491         if((*csocket)->sk->sk_rcvbuf < (140 * 1024))
1492                 (*csocket)->sk->sk_rcvbuf = 140 * 1024;
1493
1494         /* send RFC1001 sessinit */
1495         if(psin_server->sin_port == htons(RFC1001_PORT)) {
1496                 /* some servers require RFC1001 sessinit before sending
1497                 negprot - BB check reconnection in case where second
1498                 sessinit is sent but no second negprot */
1499                 struct rfc1002_session_packet * ses_init_buf;
1500                 struct smb_hdr * smb_buf;
1501                 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), GFP_KERNEL);
1502                 if(ses_init_buf) {
1503                         ses_init_buf->trailer.session_req.called_len = 32;
1504                         if(target_name && (target_name[0] != 0)) {
1505                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1506                                         target_name, 16);
1507                         } else {
1508                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1509                                         DEFAULT_CIFS_CALLED_NAME,16);
1510                         }
1511
1512                         ses_init_buf->trailer.session_req.calling_len = 32;
1513                         /* calling name ends in null (byte 16) from old smb
1514                         convention. */
1515                         if(netbios_name && (netbios_name[0] !=0)) {
1516                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1517                                         netbios_name,16);
1518                         } else {
1519                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1520                                         "LINUX_CIFS_CLNT",16);
1521                         }
1522                         ses_init_buf->trailer.session_req.scope1 = 0;
1523                         ses_init_buf->trailer.session_req.scope2 = 0;
1524                         smb_buf = (struct smb_hdr *)ses_init_buf;
1525                         /* sizeof RFC1002_SESSION_REQUEST with no scope */
1526                         smb_buf->smb_buf_length = 0x81000044;
1527                         rc = smb_send(*csocket, smb_buf, 0x44,
1528                                 (struct sockaddr *)psin_server);
1529                         kfree(ses_init_buf);
1530                         msleep(1); /* RFC1001 layer in at least one server
1531                                       requires very short break before negprot
1532                                       presumably because not expecting negprot
1533                                       to follow so fast.  This is a simple
1534                                       solution that works without
1535                                       complicating the code and causes no
1536                                       significant slowing down on mount
1537                                       for everyone else */
1538                 }
1539                 /* else the negprot may still work without this
1540                 even though malloc failed */
1541
1542         }
1543
1544         return rc;
1545 }
1546
1547 static int
1548 ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
1549 {
1550         int rc = 0;
1551         int connected = 0;
1552         __be16 orig_port = 0;
1553
1554         if(*csocket == NULL) {
1555                 rc = sock_create_kern(PF_INET6, SOCK_STREAM, IPPROTO_TCP, csocket);
1556                 if (rc < 0) {
1557                         cERROR(1, ("Error %d creating ipv6 socket",rc));
1558                         *csocket = NULL;
1559                         return rc;
1560                 } else {
1561                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1562                          cFYI(1,("ipv6 Socket created"));
1563                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1564                 }
1565         }
1566
1567         psin_server->sin6_family = AF_INET6;
1568
1569         if(psin_server->sin6_port) { /* user overrode default port */
1570                 rc = (*csocket)->ops->connect(*csocket,
1571                                 (struct sockaddr *) psin_server,
1572                                 sizeof (struct sockaddr_in6),0);
1573                 if (rc >= 0)
1574                         connected = 1;
1575         }
1576
1577         if(!connected) {
1578                 /* save original port so we can retry user specified port
1579                         later if fall back ports fail this time  */
1580
1581                 orig_port = psin_server->sin6_port;
1582                 /* do not retry on the same port we just failed on */
1583                 if(psin_server->sin6_port != htons(CIFS_PORT)) {
1584                         psin_server->sin6_port = htons(CIFS_PORT);
1585
1586                         rc = (*csocket)->ops->connect(*csocket,
1587                                         (struct sockaddr *) psin_server,
1588                                         sizeof (struct sockaddr_in6),0);
1589                         if (rc >= 0)
1590                                 connected = 1;
1591                 }
1592         }
1593         if (!connected) {
1594                 psin_server->sin6_port = htons(RFC1001_PORT);
1595                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1596                                          psin_server, sizeof (struct sockaddr_in6),0);
1597                 if (rc >= 0)
1598                         connected = 1;
1599         }
1600
1601         /* give up here - unless we want to retry on different
1602                 protocol families some day */
1603         if (!connected) {
1604                 if(orig_port)
1605                         psin_server->sin6_port = orig_port;
1606                 cFYI(1,("Error %d connecting to server via ipv6",rc));
1607                 sock_release(*csocket);
1608                 *csocket = NULL;
1609                 return rc;
1610         }
1611         /* Eventually check for other socket options to change from
1612                 the default. sock_setsockopt not used because it expects
1613                 user space buffer */
1614         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1615
1616         return rc;
1617 }
1618
1619 void reset_cifs_unix_caps(int xid, struct cifsTconInfo * tcon,
1620                           struct super_block * sb, struct smb_vol * vol_info)
1621 {
1622         /* if we are reconnecting then should we check to see if
1623          * any requested capabilities changed locally e.g. via
1624          * remount but we can not do much about it here
1625          * if they have (even if we could detect it by the following)
1626          * Perhaps we could add a backpointer to array of sb from tcon
1627          * or if we change to make all sb to same share the same
1628          * sb as NFS - then we only have one backpointer to sb.
1629          * What if we wanted to mount the server share twice once with
1630          * and once without posixacls or posix paths? */
1631         __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1632
1633
1634         if(!CIFSSMBQFSUnixInfo(xid, tcon)) {
1635                 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1636
1637                 /* check for reconnect case in which we do not
1638                    want to change the mount behavior if we can avoid it */
1639                 if(vol_info == NULL) {
1640                         /* turn off POSIX ACL and PATHNAMES if not set
1641                            originally at mount time */
1642                         if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
1643                                 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1644                         if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0)
1645                                 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1646
1647
1648
1649
1650                 }
1651
1652                 cap &= CIFS_UNIX_CAP_MASK;
1653                 if (vol_info && vol_info->no_psx_acl)
1654                         cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1655                 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
1656                         cFYI(1,("negotiated posix acl support"));
1657                         if(sb)
1658                                 sb->s_flags |= MS_POSIXACL;
1659                 }
1660
1661                 if (vol_info && vol_info->posix_paths == 0)
1662                         cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1663                 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
1664                         cFYI(1,("negotiate posix pathnames"));
1665                         if (sb)
1666                                 CIFS_SB(sb)->mnt_cifs_flags |=
1667                                         CIFS_MOUNT_POSIX_PATHS;
1668                 }
1669
1670                 /* We might be setting the path sep back to a different
1671                 form if we are reconnecting and the server switched its
1672                 posix path capability for this share */
1673                 if (sb && (CIFS_SB(sb)->prepathlen > 0))
1674                         CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
1675
1676                 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
1677                         if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
1678                                 CIFS_SB(sb)->rsize = 127 * 1024;
1679 #ifdef CONFIG_CIFS_DEBUG2
1680                                 cFYI(1,("larger reads not supported by srv"));
1681 #endif
1682                         }
1683                 }
1684
1685
1686                 cFYI(1,("Negotiate caps 0x%x",(int)cap));
1687 #ifdef CONFIG_CIFS_DEBUG2
1688                 if (cap & CIFS_UNIX_FCNTL_CAP)
1689                         cFYI(1,("FCNTL cap"));
1690                 if (cap & CIFS_UNIX_EXTATTR_CAP)
1691                         cFYI(1,("EXTATTR cap"));
1692                 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
1693                         cFYI(1,("POSIX path cap"));
1694                 if (cap & CIFS_UNIX_XATTR_CAP)
1695                         cFYI(1,("XATTR cap"));
1696                 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
1697                         cFYI(1,("POSIX ACL cap"));
1698                 if (cap & CIFS_UNIX_LARGE_READ_CAP)
1699                         cFYI(1,("very large read cap"));
1700                 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
1701                         cFYI(1,("very large write cap"));
1702 #endif /* CIFS_DEBUG2 */
1703                 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
1704                         cFYI(1,("setting capabilities failed"));
1705                 }
1706         }
1707 }
1708
1709 int
1710 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
1711            char *mount_data, const char *devname)
1712 {
1713         int rc = 0;
1714         int xid;
1715         int address_type = AF_INET;
1716         struct socket *csocket = NULL;
1717         struct sockaddr_in sin_server;
1718         struct sockaddr_in6 sin_server6;
1719         struct smb_vol volume_info;
1720         struct cifsSesInfo *pSesInfo = NULL;
1721         struct cifsSesInfo *existingCifsSes = NULL;
1722         struct cifsTconInfo *tcon = NULL;
1723         struct TCP_Server_Info *srvTcp = NULL;
1724
1725         xid = GetXid();
1726
1727 /* cFYI(1, ("Entering cifs_mount. Xid: %d with: %s", xid, mount_data)); */
1728
1729         memset(&volume_info,0,sizeof(struct smb_vol));
1730         if (cifs_parse_mount_options(mount_data, devname, &volume_info)) {
1731                 kfree(volume_info.UNC);
1732                 kfree(volume_info.password);
1733                 kfree(volume_info.prepath);
1734                 FreeXid(xid);
1735                 return -EINVAL;
1736         }
1737
1738         if (volume_info.nullauth) {
1739                 cFYI(1,("null user"));
1740                 volume_info.username = NULL;
1741         } else if (volume_info.username) {
1742                 /* BB fixme parse for domain name here */
1743                 cFYI(1, ("Username: %s", volume_info.username));
1744         } else {
1745                 cifserror("No username specified");
1746         /* In userspace mount helper we can get user name from alternate
1747            locations such as env variables and files on disk */
1748                 kfree(volume_info.UNC);
1749                 kfree(volume_info.password);
1750                 kfree(volume_info.prepath);
1751                 FreeXid(xid);
1752                 return -EINVAL;
1753         }
1754
1755         if (volume_info.UNCip && volume_info.UNC) {
1756                 rc = cifs_inet_pton(AF_INET, volume_info.UNCip,&sin_server.sin_addr.s_addr);
1757
1758                 if(rc <= 0) {
1759                         /* not ipv4 address, try ipv6 */
1760                         rc = cifs_inet_pton(AF_INET6,volume_info.UNCip,&sin_server6.sin6_addr.in6_u);
1761                         if(rc > 0)
1762                                 address_type = AF_INET6;
1763                 } else {
1764                         address_type = AF_INET;
1765                 }
1766
1767                 if(rc <= 0) {
1768                         /* we failed translating address */
1769                         kfree(volume_info.UNC);
1770                         kfree(volume_info.password);
1771                         kfree(volume_info.prepath);
1772                         FreeXid(xid);
1773                         return -EINVAL;
1774                 }
1775
1776                 cFYI(1, ("UNC: %s ip: %s", volume_info.UNC, volume_info.UNCip));
1777                 /* success */
1778                 rc = 0;
1779         } else if (volume_info.UNCip){
1780                 /* BB using ip addr as server name connect to the DFS root below */
1781                 cERROR(1,("Connecting to DFS root not implemented yet"));
1782                 kfree(volume_info.UNC);
1783                 kfree(volume_info.password);
1784                 kfree(volume_info.prepath);
1785                 FreeXid(xid);
1786                 return -EINVAL;
1787         } else /* which servers DFS root would we conect to */ {
1788                 cERROR(1,
1789                        ("CIFS mount error: No UNC path (e.g. -o unc=//192.168.1.100/public) specified"));
1790                 kfree(volume_info.UNC);
1791                 kfree(volume_info.password);
1792                 kfree(volume_info.prepath);
1793                 FreeXid(xid);
1794                 return -EINVAL;
1795         }
1796
1797         /* this is needed for ASCII cp to Unicode converts */
1798         if(volume_info.iocharset == NULL) {
1799                 cifs_sb->local_nls = load_nls_default();
1800         /* load_nls_default can not return null */
1801         } else {
1802                 cifs_sb->local_nls = load_nls(volume_info.iocharset);
1803                 if(cifs_sb->local_nls == NULL) {
1804                         cERROR(1,("CIFS mount error: iocharset %s not found",volume_info.iocharset));
1805                         kfree(volume_info.UNC);
1806                         kfree(volume_info.password);
1807                         kfree(volume_info.prepath);
1808                         FreeXid(xid);
1809                         return -ELIBACC;
1810                 }
1811         }
1812
1813         if(address_type == AF_INET)
1814                 existingCifsSes = cifs_find_tcp_session(&sin_server.sin_addr,
1815                         NULL /* no ipv6 addr */,
1816                         volume_info.username, &srvTcp);
1817         else if(address_type == AF_INET6) {
1818                 cFYI(1,("looking for ipv6 address"));
1819                 existingCifsSes = cifs_find_tcp_session(NULL /* no ipv4 addr */,
1820                         &sin_server6.sin6_addr,
1821                         volume_info.username, &srvTcp);
1822         } else {
1823                 kfree(volume_info.UNC);
1824                 kfree(volume_info.password);
1825                 kfree(volume_info.prepath);
1826                 FreeXid(xid);
1827                 return -EINVAL;
1828         }
1829
1830
1831         if (srvTcp) {
1832                 cFYI(1, ("Existing tcp session with server found"));
1833         } else {        /* create socket */
1834                 if (volume_info.port)
1835                         sin_server.sin_port = htons(volume_info.port);
1836                 else
1837                         sin_server.sin_port = 0;
1838                 if (address_type == AF_INET6) {
1839                         cFYI(1,("attempting ipv6 connect"));
1840                         /* BB should we allow ipv6 on port 139? */
1841                         /* other OS never observed in Wild doing 139 with v6 */
1842                         rc = ipv6_connect(&sin_server6,&csocket);
1843                 } else
1844                         rc = ipv4_connect(&sin_server,&csocket,
1845                                   volume_info.source_rfc1001_name,
1846                                   volume_info.target_rfc1001_name);
1847                 if (rc < 0) {
1848                         cERROR(1,
1849                                ("Error connecting to IPv4 socket. Aborting operation"));
1850                         if (csocket != NULL)
1851                                 sock_release(csocket);
1852                         kfree(volume_info.UNC);
1853                         kfree(volume_info.password);
1854                         kfree(volume_info.prepath);
1855                         FreeXid(xid);
1856                         return rc;
1857                 }
1858
1859                 srvTcp = kmalloc(sizeof (struct TCP_Server_Info), GFP_KERNEL);
1860                 if (srvTcp == NULL) {
1861                         rc = -ENOMEM;
1862                         sock_release(csocket);
1863                         kfree(volume_info.UNC);
1864                         kfree(volume_info.password);
1865                         kfree(volume_info.prepath);
1866                         FreeXid(xid);
1867                         return rc;
1868                 } else {
1869                         memset(srvTcp, 0, sizeof (struct TCP_Server_Info));
1870                         memcpy(&srvTcp->addr.sockAddr, &sin_server, sizeof (struct sockaddr_in));
1871                         atomic_set(&srvTcp->inFlight,0);
1872                         /* BB Add code for ipv6 case too */
1873                         srvTcp->ssocket = csocket;
1874                         srvTcp->protocolType = IPV4;
1875                         init_waitqueue_head(&srvTcp->response_q);
1876                         init_waitqueue_head(&srvTcp->request_q);
1877                         INIT_LIST_HEAD(&srvTcp->pending_mid_q);
1878                         /* at this point we are the only ones with the pointer
1879                         to the struct since the kernel thread not created yet
1880                         so no need to spinlock this init of tcpStatus */
1881                         srvTcp->tcpStatus = CifsNew;
1882                         init_MUTEX(&srvTcp->tcpSem);
1883                         srvTcp->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, srvTcp, "cifsd");
1884                         if ( IS_ERR(srvTcp->tsk) ) {
1885                                 rc = PTR_ERR(srvTcp->tsk);
1886                                 cERROR(1,("error %d create cifsd thread", rc));
1887                                 srvTcp->tsk = NULL;
1888                                 sock_release(csocket);
1889                                 kfree(volume_info.UNC);
1890                                 kfree(volume_info.password);
1891                                 kfree(volume_info.prepath);
1892                                 FreeXid(xid);
1893                                 return rc;
1894                         }
1895                         wait_for_completion(&cifsd_complete);
1896                         rc = 0;
1897                         memcpy(srvTcp->workstation_RFC1001_name, volume_info.source_rfc1001_name,16);
1898                         memcpy(srvTcp->server_RFC1001_name, volume_info.target_rfc1001_name,16);
1899                         srvTcp->sequence_number = 0;
1900                 }
1901         }
1902
1903         if (existingCifsSes) {
1904                 pSesInfo = existingCifsSes;
1905                 cFYI(1, ("Existing smb sess found"));
1906                 kfree(volume_info.password);
1907                 /* volume_info.UNC freed at end of function */
1908         } else if (!rc) {
1909                 cFYI(1, ("Existing smb sess not found"));
1910                 pSesInfo = sesInfoAlloc();
1911                 if (pSesInfo == NULL)
1912                         rc = -ENOMEM;
1913                 else {
1914                         pSesInfo->server = srvTcp;
1915                         sprintf(pSesInfo->serverName, "%u.%u.%u.%u",
1916                                 NIPQUAD(sin_server.sin_addr.s_addr));
1917                 }
1918
1919                 if (!rc){
1920                         /* volume_info.password freed at unmount */
1921                         if (volume_info.password)
1922                                 pSesInfo->password = volume_info.password;
1923                         if (volume_info.username)
1924                                 strncpy(pSesInfo->userName,
1925                                         volume_info.username,MAX_USERNAME_SIZE);
1926                         if (volume_info.domainname) {
1927                                 int len = strlen(volume_info.domainname);
1928                                 pSesInfo->domainName =
1929                                         kmalloc(len + 1, GFP_KERNEL);
1930                                 if (pSesInfo->domainName)
1931                                         strcpy(pSesInfo->domainName,
1932                                                 volume_info.domainname);
1933                         }
1934                         pSesInfo->linux_uid = volume_info.linux_uid;
1935                         pSesInfo->overrideSecFlg = volume_info.secFlg;
1936                         down(&pSesInfo->sesSem);
1937                         /* BB FIXME need to pass vol->secFlgs BB */
1938                         rc = cifs_setup_session(xid,pSesInfo, cifs_sb->local_nls);
1939                         up(&pSesInfo->sesSem);
1940                         if (!rc)
1941                                 atomic_inc(&srvTcp->socketUseCount);
1942                 } else
1943                         kfree(volume_info.password);
1944         }
1945
1946         /* search for existing tcon to this server share */
1947         if (!rc) {
1948                 if (volume_info.rsize > CIFSMaxBufSize) {
1949                         cERROR(1,("rsize %d too large, using MaxBufSize",
1950                                 volume_info.rsize));
1951                         cifs_sb->rsize = CIFSMaxBufSize;
1952                 } else if ((volume_info.rsize) &&
1953                                 (volume_info.rsize <= CIFSMaxBufSize))
1954                         cifs_sb->rsize = volume_info.rsize;
1955                 else /* default */
1956                         cifs_sb->rsize = CIFSMaxBufSize;
1957
1958                 if (volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
1959                         cERROR(1,("wsize %d too large, using 4096 instead",
1960                                   volume_info.wsize));
1961                         cifs_sb->wsize = 4096;
1962                 } else if (volume_info.wsize)
1963                         cifs_sb->wsize = volume_info.wsize;
1964                 else
1965                         cifs_sb->wsize =
1966                                 min_t(const int, PAGEVEC_SIZE * PAGE_CACHE_SIZE,
1967                                         127*1024);
1968                         /* old default of CIFSMaxBufSize was too small now
1969                            that SMB Write2 can send multiple pages in kvec.
1970                            RFC1001 does not describe what happens when frame
1971                            bigger than 128K is sent so use that as max in
1972                            conjunction with 52K kvec constraint on arch with 4K
1973                            page size  */
1974
1975                 if (cifs_sb->rsize < 2048) {
1976                         cifs_sb->rsize = 2048;
1977                         /* Windows ME may prefer this */
1978                         cFYI(1, ("readsize set to minimum: 2048"));
1979                 }
1980                 /* calculate prepath */
1981                 cifs_sb->prepath = volume_info.prepath;
1982                 if (cifs_sb->prepath) {
1983                         cifs_sb->prepathlen = strlen(cifs_sb->prepath);
1984                         cifs_sb->prepath[0] = CIFS_DIR_SEP(cifs_sb);
1985                         volume_info.prepath = NULL;
1986                 } else
1987                         cifs_sb->prepathlen = 0;
1988                 cifs_sb->mnt_uid = volume_info.linux_uid;
1989                 cifs_sb->mnt_gid = volume_info.linux_gid;
1990                 cifs_sb->mnt_file_mode = volume_info.file_mode;
1991                 cifs_sb->mnt_dir_mode = volume_info.dir_mode;
1992                 cFYI(1, ("file mode: 0x%x  dir mode: 0x%x",
1993                         cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode));
1994
1995                 if (volume_info.noperm)
1996                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
1997                 if (volume_info.setuids)
1998                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
1999                 if (volume_info.server_ino)
2000                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2001                 if (volume_info.remap)
2002                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2003                 if (volume_info.no_xattr)
2004                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2005                 if (volume_info.sfu_emul)
2006                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2007                 if (volume_info.nobrl)
2008                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2009                 if (volume_info.cifs_acl)
2010                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2011                 if (volume_info.override_uid)
2012                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2013                 if (volume_info.override_gid)
2014                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2015                 if (volume_info.direct_io) {
2016                         cFYI(1, ("mounting share using direct i/o"));
2017                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2018                 }
2019
2020                 tcon =
2021                     find_unc(sin_server.sin_addr.s_addr, volume_info.UNC,
2022                              volume_info.username);
2023                 if (tcon) {
2024                         cFYI(1, ("Found match on UNC path"));
2025                         /* we can have only one retry value for a connection
2026                            to a share so for resources mounted more than once
2027                            to the same server share the last value passed in
2028                            for the retry flag is used */
2029                         tcon->retry = volume_info.retry;
2030                         tcon->nocase = volume_info.nocase;
2031                 } else {
2032                         tcon = tconInfoAlloc();
2033                         if (tcon == NULL)
2034                                 rc = -ENOMEM;
2035                         else {
2036                                 /* check for null share name ie connecting to
2037                                  * dfs root */
2038
2039                                 /* BB check if this works for exactly length
2040                                  * three strings */
2041                                 if ((strchr(volume_info.UNC + 3, '\\') == NULL)
2042                                     && (strchr(volume_info.UNC + 3, '/') ==
2043                                         NULL)) {
2044                                         rc = connect_to_dfs_path(xid, pSesInfo,
2045                                                 "", cifs_sb->local_nls,
2046                                                 cifs_sb->mnt_cifs_flags &
2047                                                   CIFS_MOUNT_MAP_SPECIAL_CHR);
2048                                         kfree(volume_info.UNC);
2049                                         FreeXid(xid);
2050                                         return -ENODEV;
2051                                 } else {
2052                                         /* BB Do we need to wrap sesSem around
2053                                          * this TCon call and Unix SetFS as
2054                                          * we do on SessSetup and reconnect? */
2055                                         rc = CIFSTCon(xid, pSesInfo,
2056                                                 volume_info.UNC,
2057                                                 tcon, cifs_sb->local_nls);
2058                                         cFYI(1, ("CIFS Tcon rc = %d", rc));
2059                                 }
2060                                 if (!rc) {
2061                                         atomic_inc(&pSesInfo->inUse);
2062                                         tcon->retry = volume_info.retry;
2063                                         tcon->nocase = volume_info.nocase;
2064                                 }
2065                         }
2066                 }
2067         }
2068         if (pSesInfo) {
2069                 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
2070                         sb->s_maxbytes = (u64) 1 << 63;
2071                 } else
2072                         sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
2073         }
2074
2075         /* BB FIXME fix time_gran to be larger for LANMAN sessions */
2076         sb->s_time_gran = 100;
2077
2078 /* on error free sesinfo and tcon struct if needed */
2079         if (rc) {
2080                 /* if session setup failed, use count is zero but
2081                 we still need to free cifsd thread */
2082                 if (atomic_read(&srvTcp->socketUseCount) == 0) {
2083                         spin_lock(&GlobalMid_Lock);
2084                         srvTcp->tcpStatus = CifsExiting;
2085                         spin_unlock(&GlobalMid_Lock);
2086                         if (srvTcp->tsk) {
2087                                 struct task_struct *tsk;
2088                                 /* If we could verify that kthread_stop would
2089                                    always wake up processes blocked in
2090                                    tcp in recv_mesg then we could remove the
2091                                    send_sig call */
2092                                 force_sig(SIGKILL,srvTcp->tsk);
2093                                 tsk = srvTcp->tsk;
2094                                 if(tsk)
2095                                         kthread_stop(tsk);
2096                         }
2097                 }
2098                  /* If find_unc succeeded then rc == 0 so we can not end */
2099                 if (tcon)  /* up accidently freeing someone elses tcon struct */
2100                         tconInfoFree(tcon);
2101                 if (existingCifsSes == NULL) {
2102                         if (pSesInfo) {
2103                                 if ((pSesInfo->server) &&
2104                                     (pSesInfo->status == CifsGood)) {
2105                                         int temp_rc;
2106                                         temp_rc = CIFSSMBLogoff(xid, pSesInfo);
2107                                         /* if the socketUseCount is now zero */
2108                                         if ((temp_rc == -ESHUTDOWN) &&
2109                                             (pSesInfo->server) &&
2110                                             (pSesInfo->server->tsk)) {
2111                                                 struct task_struct *tsk;
2112                                                 force_sig(SIGKILL,
2113                                                         pSesInfo->server->tsk);
2114                                                 tsk = pSesInfo->server->tsk;
2115                                                 if (tsk)
2116                                                         kthread_stop(tsk);
2117                                         }
2118                                 } else
2119                                         cFYI(1, ("No session or bad tcon"));
2120                                 sesInfoFree(pSesInfo);
2121                                 /* pSesInfo = NULL; */
2122                         }
2123                 }
2124         } else {
2125                 atomic_inc(&tcon->useCount);
2126                 cifs_sb->tcon = tcon;
2127                 tcon->ses = pSesInfo;
2128
2129                 /* do not care if following two calls succeed - informational */
2130                 CIFSSMBQFSDeviceInfo(xid, tcon);
2131                 CIFSSMBQFSAttributeInfo(xid, tcon);
2132
2133                 /* tell server which Unix caps we support */
2134                 if (tcon->ses->capabilities & CAP_UNIX)
2135                         reset_cifs_unix_caps(xid, tcon, sb, &volume_info);
2136                 else if(cifs_sb->rsize > (1024 * 127)) {
2137                         cifs_sb->rsize = 1024 * 127;
2138 #ifdef CONFIG_CIFS_DEBUG2
2139                         cFYI(1, ("no very large read support, rsize 127K"));
2140 #endif
2141
2142                 }
2143                 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2144                         cifs_sb->wsize = min(cifs_sb->wsize,
2145                                              (tcon->ses->server->maxBuf -
2146                                               MAX_CIFS_HDR_SIZE));
2147                 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2148                         cifs_sb->rsize = min(cifs_sb->rsize,
2149                                              (tcon->ses->server->maxBuf -
2150                                               MAX_CIFS_HDR_SIZE));
2151         }
2152
2153         /* volume_info.password is freed above when existing session found
2154         (in which case it is not needed anymore) but when new sesion is created
2155         the password ptr is put in the new session structure (in which case the
2156         password will be freed at unmount time) */
2157         kfree(volume_info.UNC);
2158         kfree(volume_info.prepath);
2159         FreeXid(xid);
2160         return rc;
2161 }
2162
2163 static int
2164 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2165               char session_key[CIFS_SESS_KEY_SIZE],
2166               const struct nls_table *nls_codepage)
2167 {
2168         struct smb_hdr *smb_buffer;
2169         struct smb_hdr *smb_buffer_response;
2170         SESSION_SETUP_ANDX *pSMB;
2171         SESSION_SETUP_ANDX *pSMBr;
2172         char *bcc_ptr;
2173         char *user;
2174         char *domain;
2175         int rc = 0;
2176         int remaining_words = 0;
2177         int bytes_returned = 0;
2178         int len;
2179         __u32 capabilities;
2180         __u16 count;
2181
2182         cFYI(1, ("In sesssetup"));
2183         if (ses == NULL)
2184                 return -EINVAL;
2185         user = ses->userName;
2186         domain = ses->domainName;
2187         smb_buffer = cifs_buf_get();
2188         if (smb_buffer == NULL) {
2189                 return -ENOMEM;
2190         }
2191         smb_buffer_response = smb_buffer;
2192         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2193
2194         /* send SMBsessionSetup here */
2195         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2196                         NULL /* no tCon exists yet */ , 13 /* wct */ );
2197
2198         smb_buffer->Mid = GetNextMid(ses->server);
2199         pSMB->req_no_secext.AndXCommand = 0xFF;
2200         pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2201         pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2202
2203         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2204                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2205
2206         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2207                 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2208         if (ses->capabilities & CAP_UNICODE) {
2209                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2210                 capabilities |= CAP_UNICODE;
2211         }
2212         if (ses->capabilities & CAP_STATUS32) {
2213                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2214                 capabilities |= CAP_STATUS32;
2215         }
2216         if (ses->capabilities & CAP_DFS) {
2217                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2218                 capabilities |= CAP_DFS;
2219         }
2220         pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2221
2222         pSMB->req_no_secext.CaseInsensitivePasswordLength =
2223                 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2224
2225         pSMB->req_no_secext.CaseSensitivePasswordLength =
2226             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2227         bcc_ptr = pByteArea(smb_buffer);
2228         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2229         bcc_ptr += CIFS_SESS_KEY_SIZE;
2230         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2231         bcc_ptr += CIFS_SESS_KEY_SIZE;
2232
2233         if (ses->capabilities & CAP_UNICODE) {
2234                 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2235                         *bcc_ptr = 0;
2236                         bcc_ptr++;
2237                 }
2238                 if (user == NULL)
2239                         bytes_returned = 0; /* skip null user */
2240                 else
2241                         bytes_returned =
2242                                 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2243                                         nls_codepage);
2244                 /* convert number of 16 bit words to bytes */
2245                 bcc_ptr += 2 * bytes_returned;
2246                 bcc_ptr += 2;   /* trailing null */
2247                 if (domain == NULL)
2248                         bytes_returned =
2249                             cifs_strtoUCS((__le16 *) bcc_ptr,
2250                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2251                 else
2252                         bytes_returned =
2253                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2254                                           nls_codepage);
2255                 bcc_ptr += 2 * bytes_returned;
2256                 bcc_ptr += 2;
2257                 bytes_returned =
2258                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2259                                   32, nls_codepage);
2260                 bcc_ptr += 2 * bytes_returned;
2261                 bytes_returned =
2262                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release,
2263                                   32, nls_codepage);
2264                 bcc_ptr += 2 * bytes_returned;
2265                 bcc_ptr += 2;
2266                 bytes_returned =
2267                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2268                                   64, nls_codepage);
2269                 bcc_ptr += 2 * bytes_returned;
2270                 bcc_ptr += 2;
2271         } else {
2272                 if (user != NULL) {
2273                     strncpy(bcc_ptr, user, 200);
2274                     bcc_ptr += strnlen(user, 200);
2275                 }
2276                 *bcc_ptr = 0;
2277                 bcc_ptr++;
2278                 if (domain == NULL) {
2279                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2280                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2281                 } else {
2282                         strncpy(bcc_ptr, domain, 64);
2283                         bcc_ptr += strnlen(domain, 64);
2284                         *bcc_ptr = 0;
2285                         bcc_ptr++;
2286                 }
2287                 strcpy(bcc_ptr, "Linux version ");
2288                 bcc_ptr += strlen("Linux version ");
2289                 strcpy(bcc_ptr, utsname()->release);
2290                 bcc_ptr += strlen(utsname()->release) + 1;
2291                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2292                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2293         }
2294         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2295         smb_buffer->smb_buf_length += count;
2296         pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2297
2298         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2299                          &bytes_returned, 1);
2300         if (rc) {
2301 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2302         } else if ((smb_buffer_response->WordCount == 3)
2303                    || (smb_buffer_response->WordCount == 4)) {
2304                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2305                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2306                 if (action & GUEST_LOGIN)
2307                         cFYI(1, (" Guest login"));      /* do we want to mark SesInfo struct ? */
2308                 ses->Suid = smb_buffer_response->Uid;   /* UID left in wire format (le) */
2309                 cFYI(1, ("UID = %d ", ses->Suid));
2310          /* response can have either 3 or 4 word count - Samba sends 3 */
2311                 bcc_ptr = pByteArea(smb_buffer_response);
2312                 if ((pSMBr->resp.hdr.WordCount == 3)
2313                     || ((pSMBr->resp.hdr.WordCount == 4)
2314                         && (blob_len < pSMBr->resp.ByteCount))) {
2315                         if (pSMBr->resp.hdr.WordCount == 4)
2316                                 bcc_ptr += blob_len;
2317
2318                         if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2319                                 if ((long) (bcc_ptr) % 2) {
2320                                         remaining_words =
2321                                             (BCC(smb_buffer_response) - 1) /2;
2322                                         bcc_ptr++;      /* Unicode strings must be word aligned */
2323                                 } else {
2324                                         remaining_words =
2325                                                 BCC(smb_buffer_response) / 2;
2326                                 }
2327                                 len =
2328                                     UniStrnlen((wchar_t *) bcc_ptr,
2329                                                remaining_words - 1);
2330 /* We look for obvious messed up bcc or strings in response so we do not go off
2331    the end since (at least) WIN2K and Windows XP have a major bug in not null
2332    terminating last Unicode string in response  */
2333                                 if(ses->serverOS)
2334                                         kfree(ses->serverOS);
2335                                 ses->serverOS = kzalloc(2 * (len + 1), GFP_KERNEL);
2336                                 if(ses->serverOS == NULL)
2337                                         goto sesssetup_nomem;
2338                                 cifs_strfromUCS_le(ses->serverOS,
2339                                            (__le16 *)bcc_ptr, len,nls_codepage);
2340                                 bcc_ptr += 2 * (len + 1);
2341                                 remaining_words -= len + 1;
2342                                 ses->serverOS[2 * len] = 0;
2343                                 ses->serverOS[1 + (2 * len)] = 0;
2344                                 if (remaining_words > 0) {
2345                                         len = UniStrnlen((wchar_t *)bcc_ptr,
2346                                                          remaining_words-1);
2347                                         kfree(ses->serverNOS);
2348                                         ses->serverNOS = kzalloc(2 * (len + 1),GFP_KERNEL);
2349                                         if(ses->serverNOS == NULL)
2350                                                 goto sesssetup_nomem;
2351                                         cifs_strfromUCS_le(ses->serverNOS,
2352                                                            (__le16 *)bcc_ptr,len,nls_codepage);
2353                                         bcc_ptr += 2 * (len + 1);
2354                                         ses->serverNOS[2 * len] = 0;
2355                                         ses->serverNOS[1 + (2 * len)] = 0;
2356                                         if(strncmp(ses->serverNOS,
2357                                                 "NT LAN Manager 4",16) == 0) {
2358                                                 cFYI(1, ("NT4 server"));
2359                                                 ses->flags |= CIFS_SES_NT4;
2360                                         }
2361                                         remaining_words -= len + 1;
2362                                         if (remaining_words > 0) {
2363                                                 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2364           /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2365                                                 if(ses->serverDomain)
2366                                                         kfree(ses->serverDomain);
2367                                                 ses->serverDomain =
2368                                                     kzalloc(2*(len+1),GFP_KERNEL);
2369                                                 if(ses->serverDomain == NULL)
2370                                                         goto sesssetup_nomem;
2371                                                 cifs_strfromUCS_le(ses->serverDomain,
2372                                                      (__le16 *)bcc_ptr,len,nls_codepage);
2373                                                 bcc_ptr += 2 * (len + 1);
2374                                                 ses->serverDomain[2*len] = 0;
2375                                                 ses->serverDomain[1+(2*len)] = 0;
2376                                         } /* else no more room so create dummy domain string */
2377                                         else {
2378                                                 if(ses->serverDomain)
2379                                                         kfree(ses->serverDomain);
2380                                                 ses->serverDomain =
2381                                                         kzalloc(2, GFP_KERNEL);
2382                                         }
2383                                 } else {        /* no room so create dummy domain and NOS string */
2384                                         /* if these kcallocs fail not much we
2385                                            can do, but better to not fail the
2386                                            sesssetup itself */
2387                                         kfree(ses->serverDomain);
2388                                         ses->serverDomain =
2389                                             kzalloc(2, GFP_KERNEL);
2390                                         kfree(ses->serverNOS);
2391                                         ses->serverNOS =
2392                                             kzalloc(2, GFP_KERNEL);
2393                                 }
2394                         } else {        /* ASCII */
2395                                 len = strnlen(bcc_ptr, 1024);
2396                                 if (((long) bcc_ptr + len) - (long)
2397                                     pByteArea(smb_buffer_response)
2398                                             <= BCC(smb_buffer_response)) {
2399                                         kfree(ses->serverOS);
2400                                         ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
2401                                         if(ses->serverOS == NULL)
2402                                                 goto sesssetup_nomem;
2403                                         strncpy(ses->serverOS,bcc_ptr, len);
2404
2405                                         bcc_ptr += len;
2406                                         bcc_ptr[0] = 0; /* null terminate the string */
2407                                         bcc_ptr++;
2408
2409                                         len = strnlen(bcc_ptr, 1024);
2410                                         kfree(ses->serverNOS);
2411                                         ses->serverNOS = kzalloc(len + 1,GFP_KERNEL);
2412                                         if(ses->serverNOS == NULL)
2413                                                 goto sesssetup_nomem;
2414                                         strncpy(ses->serverNOS, bcc_ptr, len);
2415                                         bcc_ptr += len;
2416                                         bcc_ptr[0] = 0;
2417                                         bcc_ptr++;
2418
2419                                         len = strnlen(bcc_ptr, 1024);
2420                                         if(ses->serverDomain)
2421                                                 kfree(ses->serverDomain);
2422                                         ses->serverDomain = kzalloc(len + 1,GFP_KERNEL);
2423                                         if(ses->serverDomain == NULL)
2424                                                 goto sesssetup_nomem;
2425                                         strncpy(ses->serverDomain, bcc_ptr, len);
2426                                         bcc_ptr += len;
2427                                         bcc_ptr[0] = 0;
2428                                         bcc_ptr++;
2429                                 } else
2430                                         cFYI(1,
2431                                              ("Variable field of length %d extends beyond end of smb ",
2432                                               len));
2433                         }
2434                 } else {
2435                         cERROR(1,
2436                                (" Security Blob Length extends beyond end of SMB"));
2437                 }
2438         } else {
2439                 cERROR(1,
2440                        (" Invalid Word count %d: ",
2441                         smb_buffer_response->WordCount));
2442                 rc = -EIO;
2443         }
2444 sesssetup_nomem:        /* do not return an error on nomem for the info strings,
2445                            since that could make reconnection harder, and
2446                            reconnection might be needed to free memory */
2447         if (smb_buffer)
2448                 cifs_buf_release(smb_buffer);
2449
2450         return rc;
2451 }
2452
2453 static int
2454 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2455                               struct cifsSesInfo *ses, int * pNTLMv2_flag,
2456                               const struct nls_table *nls_codepage)
2457 {
2458         struct smb_hdr *smb_buffer;
2459         struct smb_hdr *smb_buffer_response;
2460         SESSION_SETUP_ANDX *pSMB;
2461         SESSION_SETUP_ANDX *pSMBr;
2462         char *bcc_ptr;
2463         char *domain;
2464         int rc = 0;
2465         int remaining_words = 0;
2466         int bytes_returned = 0;
2467         int len;
2468         int SecurityBlobLength = sizeof (NEGOTIATE_MESSAGE);
2469         PNEGOTIATE_MESSAGE SecurityBlob;
2470         PCHALLENGE_MESSAGE SecurityBlob2;
2471         __u32 negotiate_flags, capabilities;
2472         __u16 count;
2473
2474         cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
2475         if(ses == NULL)
2476                 return -EINVAL;
2477         domain = ses->domainName;
2478         *pNTLMv2_flag = FALSE;
2479         smb_buffer = cifs_buf_get();
2480         if (smb_buffer == NULL) {
2481                 return -ENOMEM;
2482         }
2483         smb_buffer_response = smb_buffer;
2484         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2485         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2486
2487         /* send SMBsessionSetup here */
2488         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2489                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2490
2491         smb_buffer->Mid = GetNextMid(ses->server);
2492         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2493         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2494
2495         pSMB->req.AndXCommand = 0xFF;
2496         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2497         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2498
2499         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2500                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2501
2502         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2503             CAP_EXTENDED_SECURITY;
2504         if (ses->capabilities & CAP_UNICODE) {
2505                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2506                 capabilities |= CAP_UNICODE;
2507         }
2508         if (ses->capabilities & CAP_STATUS32) {
2509                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2510                 capabilities |= CAP_STATUS32;
2511         }
2512         if (ses->capabilities & CAP_DFS) {
2513                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2514                 capabilities |= CAP_DFS;
2515         }
2516         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2517
2518         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2519         SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2520         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2521         SecurityBlob->MessageType = NtLmNegotiate;
2522         negotiate_flags =
2523             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2524             NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
2525             NTLMSSP_NEGOTIATE_56 |
2526             /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2527         if(sign_CIFS_PDUs)
2528                 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2529 /*      if(ntlmv2_support)
2530                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;*/
2531         /* setup pointers to domain name and workstation name */
2532         bcc_ptr += SecurityBlobLength;
2533
2534         SecurityBlob->WorkstationName.Buffer = 0;
2535         SecurityBlob->WorkstationName.Length = 0;
2536         SecurityBlob->WorkstationName.MaximumLength = 0;
2537
2538         /* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
2539         along with username on auth request (ie the response to challenge) */
2540         SecurityBlob->DomainName.Buffer = 0;
2541         SecurityBlob->DomainName.Length = 0;
2542         SecurityBlob->DomainName.MaximumLength = 0;
2543         if (ses->capabilities & CAP_UNICODE) {
2544                 if ((long) bcc_ptr % 2) {
2545                         *bcc_ptr = 0;
2546                         bcc_ptr++;
2547                 }
2548
2549                 bytes_returned =
2550                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2551                                   32, nls_codepage);
2552                 bcc_ptr += 2 * bytes_returned;
2553                 bytes_returned =
2554                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
2555                                   nls_codepage);
2556                 bcc_ptr += 2 * bytes_returned;
2557                 bcc_ptr += 2;   /* null terminate Linux version */
2558                 bytes_returned =
2559                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2560                                   64, nls_codepage);
2561                 bcc_ptr += 2 * bytes_returned;
2562                 *(bcc_ptr + 1) = 0;
2563                 *(bcc_ptr + 2) = 0;
2564                 bcc_ptr += 2;   /* null terminate network opsys string */
2565                 *(bcc_ptr + 1) = 0;
2566                 *(bcc_ptr + 2) = 0;
2567                 bcc_ptr += 2;   /* null domain */
2568         } else {                /* ASCII */
2569                 strcpy(bcc_ptr, "Linux version ");
2570                 bcc_ptr += strlen("Linux version ");
2571                 strcpy(bcc_ptr, utsname()->release);
2572                 bcc_ptr += strlen(utsname()->release) + 1;
2573                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2574                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2575                 bcc_ptr++;      /* empty domain field */
2576                 *bcc_ptr = 0;
2577         }
2578         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2579         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2580         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2581         smb_buffer->smb_buf_length += count;
2582         pSMB->req.ByteCount = cpu_to_le16(count);
2583
2584         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2585                          &bytes_returned, 1);
2586
2587         if (smb_buffer_response->Status.CifsError ==
2588             cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
2589                 rc = 0;
2590
2591         if (rc) {
2592 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2593         } else if ((smb_buffer_response->WordCount == 3)
2594                    || (smb_buffer_response->WordCount == 4)) {
2595                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2596                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2597
2598                 if (action & GUEST_LOGIN)
2599                         cFYI(1, (" Guest login"));
2600         /* Do we want to set anything in SesInfo struct when guest login? */
2601
2602                 bcc_ptr = pByteArea(smb_buffer_response);
2603         /* response can have either 3 or 4 word count - Samba sends 3 */
2604
2605                 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
2606                 if (SecurityBlob2->MessageType != NtLmChallenge) {
2607                         cFYI(1,
2608                              ("Unexpected NTLMSSP message type received %d",
2609                               SecurityBlob2->MessageType));
2610                 } else if (ses) {
2611                         ses->Suid = smb_buffer_response->Uid; /* UID left in le format */
2612                         cFYI(1, ("UID = %d", ses->Suid));
2613                         if ((pSMBr->resp.hdr.WordCount == 3)
2614                             || ((pSMBr->resp.hdr.WordCount == 4)
2615                                 && (blob_len <
2616                                     pSMBr->resp.ByteCount))) {
2617
2618                                 if (pSMBr->resp.hdr.WordCount == 4) {
2619                                         bcc_ptr += blob_len;
2620                                         cFYI(1, ("Security Blob Length %d",
2621                                               blob_len));
2622                                 }
2623
2624                                 cFYI(1, ("NTLMSSP Challenge rcvd"));
2625
2626                                 memcpy(ses->server->cryptKey,
2627                                        SecurityBlob2->Challenge,
2628                                        CIFS_CRYPTO_KEY_SIZE);
2629                                 if(SecurityBlob2->NegotiateFlags &
2630                                         cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
2631                                         *pNTLMv2_flag = TRUE;
2632
2633                                 if((SecurityBlob2->NegotiateFlags &
2634                                         cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN))
2635                                         || (sign_CIFS_PDUs > 1))
2636                                                 ses->server->secMode |=
2637                                                         SECMODE_SIGN_REQUIRED;
2638                                 if ((SecurityBlob2->NegotiateFlags &
2639                                         cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
2640                                                 ses->server->secMode |=
2641                                                         SECMODE_SIGN_ENABLED;
2642
2643                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2644                                         if ((long) (bcc_ptr) % 2) {
2645                                                 remaining_words =
2646                                                     (BCC(smb_buffer_response)
2647                                                      - 1) / 2;
2648                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
2649                                         } else {
2650                                                 remaining_words =
2651                                                     BCC
2652                                                     (smb_buffer_response) / 2;
2653                                         }
2654                                         len =
2655                                             UniStrnlen((wchar_t *) bcc_ptr,
2656                                                        remaining_words - 1);
2657 /* We look for obvious messed up bcc or strings in response so we do not go off
2658    the end since (at least) WIN2K and Windows XP have a major bug in not null
2659    terminating last Unicode string in response  */
2660                                         if(ses->serverOS)
2661                                                 kfree(ses->serverOS);
2662                                         ses->serverOS =
2663                                             kzalloc(2 * (len + 1), GFP_KERNEL);
2664                                         cifs_strfromUCS_le(ses->serverOS,
2665                                                            (__le16 *)
2666                                                            bcc_ptr, len,
2667                                                            nls_codepage);
2668                                         bcc_ptr += 2 * (len + 1);
2669                                         remaining_words -= len + 1;
2670                                         ses->serverOS[2 * len] = 0;
2671                                         ses->serverOS[1 + (2 * len)] = 0;
2672                                         if (remaining_words > 0) {
2673                                                 len = UniStrnlen((wchar_t *)
2674                                                                  bcc_ptr,
2675                                                                  remaining_words
2676                                                                  - 1);
2677                                                 kfree(ses->serverNOS);
2678                                                 ses->serverNOS =
2679                                                     kzalloc(2 * (len + 1),
2680                                                             GFP_KERNEL);
2681                                                 cifs_strfromUCS_le(ses->
2682                                                                    serverNOS,
2683                                                                    (__le16 *)
2684                                                                    bcc_ptr,
2685                                                                    len,
2686                                                                    nls_codepage);
2687                                                 bcc_ptr += 2 * (len + 1);
2688                                                 ses->serverNOS[2 * len] = 0;
2689                                                 ses->serverNOS[1 +
2690                                                                (2 * len)] = 0;
2691                                                 remaining_words -= len + 1;
2692                                                 if (remaining_words > 0) {
2693                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2694            /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2695                                                         kfree(ses->serverDomain);
2696                                                         ses->serverDomain =
2697                                                             kzalloc(2 *
2698                                                                     (len +
2699                                                                      1),
2700                                                                     GFP_KERNEL);
2701                                                         cifs_strfromUCS_le
2702                                                             (ses->serverDomain,
2703                                                              (__le16 *)bcc_ptr,
2704                                                              len, nls_codepage);
2705                                                         bcc_ptr +=
2706                                                             2 * (len + 1);
2707                                                         ses->serverDomain[2*len]
2708                                                             = 0;
2709                                                         ses->serverDomain
2710                                                                 [1 + (2 * len)]
2711                                                             = 0;
2712                                                 } /* else no more room so create dummy domain string */
2713                                                 else {
2714                                                         kfree(ses->serverDomain);
2715                                                         ses->serverDomain =
2716                                                             kzalloc(2,
2717                                                                     GFP_KERNEL);
2718                                                 }
2719                                         } else {        /* no room so create dummy domain and NOS string */
2720                                                 kfree(ses->serverDomain);
2721                                                 ses->serverDomain =
2722                                                     kzalloc(2, GFP_KERNEL);
2723                                                 kfree(ses->serverNOS);
2724                                                 ses->serverNOS =
2725                                                     kzalloc(2, GFP_KERNEL);
2726                                         }
2727                                 } else {        /* ASCII */
2728                                         len = strnlen(bcc_ptr, 1024);
2729                                         if (((long) bcc_ptr + len) - (long)
2730                                             pByteArea(smb_buffer_response)
2731                                             <= BCC(smb_buffer_response)) {
2732                                                 if(ses->serverOS)
2733                                                         kfree(ses->serverOS);
2734                                                 ses->serverOS =
2735                                                     kzalloc(len + 1,
2736                                                             GFP_KERNEL);
2737                                                 strncpy(ses->serverOS,
2738                                                         bcc_ptr, len);
2739
2740                                                 bcc_ptr += len;
2741                                                 bcc_ptr[0] = 0; /* null terminate string */
2742                                                 bcc_ptr++;
2743
2744                                                 len = strnlen(bcc_ptr, 1024);
2745                                                 kfree(ses->serverNOS);
2746                                                 ses->serverNOS =
2747                                                     kzalloc(len + 1,
2748                                                             GFP_KERNEL);
2749                                                 strncpy(ses->serverNOS, bcc_ptr, len);
2750                                                 bcc_ptr += len;
2751                                                 bcc_ptr[0] = 0;
2752                                                 bcc_ptr++;
2753
2754                                                 len = strnlen(bcc_ptr, 1024);
2755                                                 kfree(ses->serverDomain);
2756                                                 ses->serverDomain =
2757                                                     kzalloc(len + 1,
2758                                                             GFP_KERNEL);
2759                                                 strncpy(ses->serverDomain, bcc_ptr, len);
2760                                                 bcc_ptr += len;
2761                                                 bcc_ptr[0] = 0;
2762                                                 bcc_ptr++;
2763                                         } else
2764                                                 cFYI(1,
2765                                                      ("Variable field of length %d extends beyond end of smb",
2766                                                       len));
2767                                 }
2768                         } else {
2769                                 cERROR(1,
2770                                        (" Security Blob Length extends beyond end of SMB"));
2771                         }
2772                 } else {
2773                         cERROR(1, ("No session structure passed in."));
2774                 }
2775         } else {
2776                 cERROR(1,
2777                        (" Invalid Word count %d:",
2778                         smb_buffer_response->WordCount));
2779                 rc = -EIO;
2780         }
2781
2782         if (smb_buffer)
2783                 cifs_buf_release(smb_buffer);
2784
2785         return rc;
2786 }
2787 static int
2788 CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2789                 char *ntlm_session_key, int ntlmv2_flag,
2790                 const struct nls_table *nls_codepage)
2791 {
2792         struct smb_hdr *smb_buffer;
2793         struct smb_hdr *smb_buffer_response;
2794         SESSION_SETUP_ANDX *pSMB;
2795         SESSION_SETUP_ANDX *pSMBr;
2796         char *bcc_ptr;
2797         char *user;
2798         char *domain;
2799         int rc = 0;
2800         int remaining_words = 0;
2801         int bytes_returned = 0;
2802         int len;
2803         int SecurityBlobLength = sizeof (AUTHENTICATE_MESSAGE);
2804         PAUTHENTICATE_MESSAGE SecurityBlob;
2805         __u32 negotiate_flags, capabilities;
2806         __u16 count;
2807
2808         cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
2809         if(ses == NULL)
2810                 return -EINVAL;
2811         user = ses->userName;
2812         domain = ses->domainName;
2813         smb_buffer = cifs_buf_get();
2814         if (smb_buffer == NULL) {
2815                 return -ENOMEM;
2816         }
2817         smb_buffer_response = smb_buffer;
2818         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2819         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2820
2821         /* send SMBsessionSetup here */
2822         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2823                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2824
2825         smb_buffer->Mid = GetNextMid(ses->server);
2826         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2827         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2828         pSMB->req.AndXCommand = 0xFF;
2829         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2830         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2831
2832         pSMB->req.hdr.Uid = ses->Suid;
2833
2834         if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2835                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2836
2837         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2838             CAP_EXTENDED_SECURITY;
2839         if (ses->capabilities & CAP_UNICODE) {
2840                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2841                 capabilities |= CAP_UNICODE;
2842         }
2843         if (ses->capabilities & CAP_STATUS32) {
2844                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2845                 capabilities |= CAP_STATUS32;
2846         }
2847         if (ses->capabilities & CAP_DFS) {
2848                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2849                 capabilities |= CAP_DFS;
2850         }
2851         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2852
2853         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2854         SecurityBlob = (PAUTHENTICATE_MESSAGE) bcc_ptr;
2855         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2856         SecurityBlob->MessageType = NtLmAuthenticate;
2857         bcc_ptr += SecurityBlobLength;
2858         negotiate_flags =
2859             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
2860             NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
2861             0x80000000 | NTLMSSP_NEGOTIATE_128;
2862         if(sign_CIFS_PDUs)
2863                 negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
2864         if(ntlmv2_flag)
2865                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
2866
2867 /* setup pointers to domain name and workstation name */
2868
2869         SecurityBlob->WorkstationName.Buffer = 0;
2870         SecurityBlob->WorkstationName.Length = 0;
2871         SecurityBlob->WorkstationName.MaximumLength = 0;
2872         SecurityBlob->SessionKey.Length = 0;
2873         SecurityBlob->SessionKey.MaximumLength = 0;
2874         SecurityBlob->SessionKey.Buffer = 0;
2875
2876         SecurityBlob->LmChallengeResponse.Length = 0;
2877         SecurityBlob->LmChallengeResponse.MaximumLength = 0;
2878         SecurityBlob->LmChallengeResponse.Buffer = 0;
2879
2880         SecurityBlob->NtChallengeResponse.Length =
2881             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2882         SecurityBlob->NtChallengeResponse.MaximumLength =
2883             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2884         memcpy(bcc_ptr, ntlm_session_key, CIFS_SESS_KEY_SIZE);
2885         SecurityBlob->NtChallengeResponse.Buffer =
2886             cpu_to_le32(SecurityBlobLength);
2887         SecurityBlobLength += CIFS_SESS_KEY_SIZE;
2888         bcc_ptr += CIFS_SESS_KEY_SIZE;
2889
2890         if (ses->capabilities & CAP_UNICODE) {
2891                 if (domain == NULL) {
2892                         SecurityBlob->DomainName.Buffer = 0;
2893                         SecurityBlob->DomainName.Length = 0;
2894                         SecurityBlob->DomainName.MaximumLength = 0;
2895                 } else {
2896                         __u16 len =
2897                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2898                                           nls_codepage);
2899                         len *= 2;
2900                         SecurityBlob->DomainName.MaximumLength =
2901                             cpu_to_le16(len);
2902                         SecurityBlob->DomainName.Buffer =
2903                             cpu_to_le32(SecurityBlobLength);
2904                         bcc_ptr += len;
2905                         SecurityBlobLength += len;
2906                         SecurityBlob->DomainName.Length =
2907                             cpu_to_le16(len);
2908                 }
2909                 if (user == NULL) {
2910                         SecurityBlob->UserName.Buffer = 0;
2911                         SecurityBlob->UserName.Length = 0;
2912                         SecurityBlob->UserName.MaximumLength = 0;
2913                 } else {
2914                         __u16 len =
2915                             cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
2916                                           nls_codepage);
2917                         len *= 2;
2918                         SecurityBlob->UserName.MaximumLength =
2919                             cpu_to_le16(len);
2920                         SecurityBlob->UserName.Buffer =
2921                             cpu_to_le32(SecurityBlobLength);
2922                         bcc_ptr += len;
2923                         SecurityBlobLength += len;
2924                         SecurityBlob->UserName.Length =
2925                             cpu_to_le16(len);
2926                 }
2927
2928                 /* SecurityBlob->WorkstationName.Length = cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
2929                    SecurityBlob->WorkstationName.Length *= 2;
2930                    SecurityBlob->WorkstationName.MaximumLength = cpu_to_le16(SecurityBlob->WorkstationName.Length);
2931                    SecurityBlob->WorkstationName.Buffer = cpu_to_le32(SecurityBlobLength);
2932                    bcc_ptr += SecurityBlob->WorkstationName.Length;
2933                    SecurityBlobLength += SecurityBlob->WorkstationName.Length;
2934                    SecurityBlob->WorkstationName.Length = cpu_to_le16(SecurityBlob->WorkstationName.Length);  */
2935
2936                 if ((long) bcc_ptr % 2) {
2937                         *bcc_ptr = 0;
2938                         bcc_ptr++;
2939                 }
2940                 bytes_returned =
2941                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2942                                   32, nls_codepage);
2943                 bcc_ptr += 2 * bytes_returned;
2944                 bytes_returned =
2945                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
2946                                   nls_codepage);
2947                 bcc_ptr += 2 * bytes_returned;
2948                 bcc_ptr += 2;   /* null term version string */
2949                 bytes_returned =
2950                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2951                                   64, nls_codepage);
2952                 bcc_ptr += 2 * bytes_returned;
2953                 *(bcc_ptr + 1) = 0;
2954                 *(bcc_ptr + 2) = 0;
2955                 bcc_ptr += 2;   /* null terminate network opsys string */
2956                 *(bcc_ptr + 1) = 0;
2957                 *(bcc_ptr + 2) = 0;
2958                 bcc_ptr += 2;   /* null domain */
2959         } else {                /* ASCII */
2960                 if (domain == NULL) {
2961                         SecurityBlob->DomainName.Buffer = 0;
2962                         SecurityBlob->DomainName.Length = 0;
2963                         SecurityBlob->DomainName.MaximumLength = 0;
2964                 } else {
2965                         __u16 len;
2966                         negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
2967                         strncpy(bcc_ptr, domain, 63);
2968                         len = strnlen(domain, 64);
2969                         SecurityBlob->DomainName.MaximumLength =
2970                             cpu_to_le16(len);
2971                         SecurityBlob->DomainName.Buffer =
2972                             cpu_to_le32(SecurityBlobLength);
2973                         bcc_ptr += len;
2974                         SecurityBlobLength += len;
2975                         SecurityBlob->DomainName.Length = cpu_to_le16(len);
2976                 }
2977                 if (user == NULL) {
2978                         SecurityBlob->UserName.Buffer = 0;
2979                         SecurityBlob->UserName.Length = 0;
2980                         SecurityBlob->UserName.MaximumLength = 0;
2981                 } else {
2982                         __u16 len;
2983                         strncpy(bcc_ptr, user, 63);
2984                         len = strnlen(user, 64);
2985                         SecurityBlob->UserName.MaximumLength =
2986                             cpu_to_le16(len);
2987                         SecurityBlob->UserName.Buffer =
2988                             cpu_to_le32(SecurityBlobLength);
2989                         bcc_ptr += len;
2990                         SecurityBlobLength += len;
2991                         SecurityBlob->UserName.Length = cpu_to_le16(len);
2992                 }
2993                 /* BB fill in our workstation name if known BB */
2994
2995                 strcpy(bcc_ptr, "Linux version ");
2996                 bcc_ptr += strlen("Linux version ");
2997                 strcpy(bcc_ptr, utsname()->release);
2998                 bcc_ptr += strlen(utsname()->release) + 1;
2999                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
3000                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
3001                 bcc_ptr++;      /* null domain */
3002                 *bcc_ptr = 0;
3003         }
3004         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
3005         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
3006         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
3007         smb_buffer->smb_buf_length += count;
3008         pSMB->req.ByteCount = cpu_to_le16(count);
3009
3010         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
3011                          &bytes_returned, 1);
3012         if (rc) {
3013 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
3014         } else if ((smb_buffer_response->WordCount == 3)
3015                    || (smb_buffer_response->WordCount == 4)) {
3016                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
3017                 __u16 blob_len =
3018                     le16_to_cpu(pSMBr->resp.SecurityBlobLength);
3019                 if (action & GUEST_LOGIN)
3020                         cFYI(1, (" Guest login"));      /* BB do we want to set anything in SesInfo struct ? */
3021 /*        if(SecurityBlob2->MessageType != NtLm??){
3022                  cFYI("Unexpected message type on auth response is %d "));
3023         } */
3024                 if (ses) {
3025                         cFYI(1,
3026                              ("Does UID on challenge %d match auth response UID %d ",
3027                               ses->Suid, smb_buffer_response->Uid));
3028                         ses->Suid = smb_buffer_response->Uid; /* UID left in wire format */
3029                         bcc_ptr = pByteArea(smb_buffer_response);
3030             /* response can have either 3 or 4 word count - Samba sends 3 */
3031                         if ((pSMBr->resp.hdr.WordCount == 3)
3032                             || ((pSMBr->resp.hdr.WordCount == 4)
3033                                 && (blob_len <
3034                                     pSMBr->resp.ByteCount))) {
3035                                 if (pSMBr->resp.hdr.WordCount == 4) {
3036                                         bcc_ptr +=
3037                                             blob_len;
3038                                         cFYI(1,
3039                                              ("Security Blob Length %d ",
3040                                               blob_len));
3041                                 }
3042
3043                                 cFYI(1,
3044                                      ("NTLMSSP response to Authenticate "));
3045
3046                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3047                                         if ((long) (bcc_ptr) % 2) {
3048                                                 remaining_words =
3049                                                     (BCC(smb_buffer_response)
3050                                                      - 1) / 2;
3051                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
3052                                         } else {
3053                                                 remaining_words = BCC(smb_buffer_response) / 2;
3054                                         }
3055                                         len =
3056                                             UniStrnlen((wchar_t *) bcc_ptr,remaining_words - 1);
3057 /* We look for obvious messed up bcc or strings in response so we do not go off
3058   the end since (at least) WIN2K and Windows XP have a major bug in not null
3059   terminating last Unicode string in response  */
3060                                         if(ses->serverOS)
3061                                                 kfree(ses->serverOS);
3062                                         ses->serverOS =
3063                                             kzalloc(2 * (len + 1), GFP_KERNEL);
3064                                         cifs_strfromUCS_le(ses->serverOS,
3065                                                            (__le16 *)
3066                                                            bcc_ptr, len,
3067                                                            nls_codepage);
3068                                         bcc_ptr += 2 * (len + 1);
3069                                         remaining_words -= len + 1;
3070                                         ses->serverOS[2 * len] = 0;
3071                                         ses->serverOS[1 + (2 * len)] = 0;
3072                                         if (remaining_words > 0) {
3073                                                 len = UniStrnlen((wchar_t *)
3074                                                                  bcc_ptr,
3075                                                                  remaining_words
3076                                                                  - 1);
3077                                                 kfree(ses->serverNOS);
3078                                                 ses->serverNOS =
3079                                                     kzalloc(2 * (len + 1),
3080                                                             GFP_KERNEL);
3081                                                 cifs_strfromUCS_le(ses->
3082                                                                    serverNOS,
3083                                                                    (__le16 *)
3084                                                                    bcc_ptr,
3085                                                                    len,
3086                                                                    nls_codepage);
3087                                                 bcc_ptr += 2 * (len + 1);
3088                                                 ses->serverNOS[2 * len] = 0;
3089                                                 ses->serverNOS[1+(2*len)] = 0;
3090                                                 remaining_words -= len + 1;
3091                                                 if (remaining_words > 0) {
3092                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3093      /* last string not always null terminated (e.g. for Windows XP & 2000) */
3094                                                         if(ses->serverDomain)
3095                                                                 kfree(ses->serverDomain);
3096                                                         ses->serverDomain =
3097                                                             kzalloc(2 *
3098                                                                     (len +
3099                                                                      1),
3100                                                                     GFP_KERNEL);
3101                                                         cifs_strfromUCS_le
3102                                                             (ses->
3103                                                              serverDomain,
3104                                                              (__le16 *)
3105                                                              bcc_ptr, len,
3106                                                              nls_codepage);
3107                                                         bcc_ptr +=
3108                                                             2 * (len + 1);
3109                                                         ses->
3110                                                             serverDomain[2
3111                                                                          * len]
3112                                                             = 0;
3113                                                         ses->
3114                                                             serverDomain[1
3115                                                                          +
3116                                                                          (2
3117                                                                           *
3118                                                                           len)]
3119                                                             = 0;
3120                                                 } /* else no more room so create dummy domain string */
3121                                                 else {
3122                                                         if(ses->serverDomain)
3123                                                                 kfree(ses->serverDomain);
3124                                                         ses->serverDomain = kzalloc(2,GFP_KERNEL);
3125                                                 }
3126                                         } else {  /* no room so create dummy domain and NOS string */
3127                                                 if(ses->serverDomain)
3128                                                         kfree(ses->serverDomain);
3129                                                 ses->serverDomain = kzalloc(2, GFP_KERNEL);
3130                                                 kfree(ses->serverNOS);
3131                                                 ses->serverNOS = kzalloc(2, GFP_KERNEL);
3132                                         }
3133                                 } else {        /* ASCII */
3134                                         len = strnlen(bcc_ptr, 1024);
3135                                         if (((long) bcc_ptr + len) -
3136                         (long) pByteArea(smb_buffer_response)
3137                             <= BCC(smb_buffer_response)) {
3138                                                 if(ses->serverOS)
3139                                                         kfree(ses->serverOS);
3140                                                 ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
3141                                                 strncpy(ses->serverOS,bcc_ptr, len);
3142
3143                                                 bcc_ptr += len;
3144                                                 bcc_ptr[0] = 0; /* null terminate the string */
3145                                                 bcc_ptr++;
3146
3147                                                 len = strnlen(bcc_ptr, 1024);
3148                                                 kfree(ses->serverNOS);
3149                                                 ses->serverNOS = kzalloc(len+1,GFP_KERNEL);
3150                                                 strncpy(ses->serverNOS, bcc_ptr, len);
3151                                                 bcc_ptr += len;
3152                                                 bcc_ptr[0] = 0;
3153                                                 bcc_ptr++;
3154
3155                                                 len = strnlen(bcc_ptr, 1024);
3156                                                 if(ses->serverDomain)
3157                                                         kfree(ses->serverDomain);
3158                                                 ses->serverDomain = kzalloc(len+1,GFP_KERNEL);
3159                                                 strncpy(ses->serverDomain, bcc_ptr, len);
3160                                                 bcc_ptr += len;
3161                                                 bcc_ptr[0] = 0;
3162                                                 bcc_ptr++;
3163                                         } else
3164                                                 cFYI(1,
3165                                                      ("Variable field of length %d extends beyond end of smb ",
3166                                                       len));
3167                                 }
3168                         } else {
3169                                 cERROR(1,
3170                                        (" Security Blob Length extends beyond end of SMB"));
3171                         }
3172                 } else {
3173                         cERROR(1, ("No session structure passed in."));
3174                 }
3175         } else {
3176                 cERROR(1,
3177                        (" Invalid Word count %d: ",
3178                         smb_buffer_response->WordCount));
3179                 rc = -EIO;
3180         }
3181
3182         if (smb_buffer)
3183                 cifs_buf_release(smb_buffer);
3184
3185         return rc;
3186 }
3187
3188 int
3189 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
3190          const char *tree, struct cifsTconInfo *tcon,
3191          const struct nls_table *nls_codepage)
3192 {
3193         struct smb_hdr *smb_buffer;
3194         struct smb_hdr *smb_buffer_response;
3195         TCONX_REQ *pSMB;
3196         TCONX_RSP *pSMBr;
3197         unsigned char *bcc_ptr;
3198         int rc = 0;
3199         int length;
3200         __u16 count;
3201
3202         if (ses == NULL)
3203                 return -EIO;
3204
3205         smb_buffer = cifs_buf_get();
3206         if (smb_buffer == NULL) {
3207                 return -ENOMEM;
3208         }
3209         smb_buffer_response = smb_buffer;
3210
3211         header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3212                         NULL /*no tid */ , 4 /*wct */ );
3213
3214         smb_buffer->Mid = GetNextMid(ses->server);
3215         smb_buffer->Uid = ses->Suid;
3216         pSMB = (TCONX_REQ *) smb_buffer;
3217         pSMBr = (TCONX_RSP *) smb_buffer_response;
3218
3219         pSMB->AndXCommand = 0xFF;
3220         pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3221         bcc_ptr = &pSMB->Password[0];
3222         if((ses->server->secMode) & SECMODE_USER) {
3223                 pSMB->PasswordLength = cpu_to_le16(1);  /* minimum */
3224                 *bcc_ptr = 0; /* password is null byte */
3225                 bcc_ptr++;              /* skip password */
3226                 /* already aligned so no need to do it below */
3227         } else {
3228                 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
3229                 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3230                    specified as required (when that support is added to
3231                    the vfs in the future) as only NTLM or the much
3232                    weaker LANMAN (which we do not send by default) is accepted
3233                    by Samba (not sure whether other servers allow
3234                    NTLMv2 password here) */
3235 #ifdef CONFIG_CIFS_WEAK_PW_HASH
3236                 if((extended_security & CIFSSEC_MAY_LANMAN) &&
3237                         (ses->server->secType == LANMAN))
3238                         calc_lanman_hash(ses, bcc_ptr);
3239                 else
3240 #endif /* CIFS_WEAK_PW_HASH */
3241                 SMBNTencrypt(ses->password,
3242                              ses->server->cryptKey,
3243                              bcc_ptr);
3244
3245                 bcc_ptr += CIFS_SESS_KEY_SIZE;
3246                 if(ses->capabilities & CAP_UNICODE) {
3247                         /* must align unicode strings */
3248                         *bcc_ptr = 0; /* null byte password */
3249                         bcc_ptr++;
3250                 }
3251         }
3252
3253         if(ses->server->secMode &
3254                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3255                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3256
3257         if (ses->capabilities & CAP_STATUS32) {
3258                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3259         }
3260         if (ses->capabilities & CAP_DFS) {
3261                 smb_buffer->Flags2 |= SMBFLG2_DFS;
3262         }
3263         if (ses->capabilities & CAP_UNICODE) {
3264                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3265                 length =
3266                     cifs_strtoUCS((__le16 *) bcc_ptr, tree,
3267                         6 /* max utf8 char length in bytes */ *
3268                         (/* server len*/ + 256 /* share len */), nls_codepage);
3269                 bcc_ptr += 2 * length;  /* convert num 16 bit words to bytes */
3270                 bcc_ptr += 2;   /* skip trailing null */
3271         } else {                /* ASCII */
3272                 strcpy(bcc_ptr, tree);
3273                 bcc_ptr += strlen(tree) + 1;
3274         }
3275         strcpy(bcc_ptr, "?????");
3276         bcc_ptr += strlen("?????");
3277         bcc_ptr += 1;
3278         count = bcc_ptr - &pSMB->Password[0];
3279         pSMB->hdr.smb_buf_length += count;
3280         pSMB->ByteCount = cpu_to_le16(count);
3281
3282         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, 0);
3283
3284         /* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
3285         /* above now done in SendReceive */
3286         if ((rc == 0) && (tcon != NULL)) {
3287                 tcon->tidStatus = CifsGood;
3288                 tcon->tid = smb_buffer_response->Tid;
3289                 bcc_ptr = pByteArea(smb_buffer_response);
3290                 length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
3291         /* skip service field (NB: this field is always ASCII) */
3292                 bcc_ptr += length + 1;
3293                 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3294                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3295                         length = UniStrnlen((wchar_t *) bcc_ptr, 512);
3296                         if ((bcc_ptr + (2 * length)) -
3297                              pByteArea(smb_buffer_response) <=
3298                             BCC(smb_buffer_response)) {
3299                                 kfree(tcon->nativeFileSystem);
3300                                 tcon->nativeFileSystem =
3301                                     kzalloc(length + 2, GFP_KERNEL);
3302                                 cifs_strfromUCS_le(tcon->nativeFileSystem,
3303                                                    (__le16 *) bcc_ptr,
3304                                                    length, nls_codepage);
3305                                 bcc_ptr += 2 * length;
3306                                 bcc_ptr[0] = 0; /* null terminate the string */
3307                                 bcc_ptr[1] = 0;
3308                                 bcc_ptr += 2;
3309                         }
3310                         /* else do not bother copying these informational fields */
3311                 } else {
3312                         length = strnlen(bcc_ptr, 1024);
3313                         if ((bcc_ptr + length) -
3314                             pByteArea(smb_buffer_response) <=
3315                             BCC(smb_buffer_response)) {
3316                                 kfree(tcon->nativeFileSystem);
3317                                 tcon->nativeFileSystem =
3318                                     kzalloc(length + 1, GFP_KERNEL);
3319                                 strncpy(tcon->nativeFileSystem, bcc_ptr,
3320                                         length);
3321                         }
3322                         /* else do not bother copying these informational fields */
3323                 }
3324                 if((smb_buffer_response->WordCount == 3) ||
3325                          (smb_buffer_response->WordCount == 7))
3326                         /* field is in same location */
3327                         tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3328                 else
3329                         tcon->Flags = 0;
3330                 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
3331         } else if ((rc == 0) && tcon == NULL) {
3332         /* all we need to save for IPC$ connection */
3333                 ses->ipc_tid = smb_buffer_response->Tid;
3334         }
3335
3336         if (smb_buffer)
3337                 cifs_buf_release(smb_buffer);
3338         return rc;
3339 }
3340
3341 int
3342 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3343 {
3344         int rc = 0;
3345         int xid;
3346         struct cifsSesInfo *ses = NULL;
3347         struct task_struct *cifsd_task;
3348         char * tmp;
3349
3350         xid = GetXid();
3351
3352         if (cifs_sb->tcon) {
3353                 ses = cifs_sb->tcon->ses; /* save ptr to ses before delete tcon!*/
3354                 rc = CIFSSMBTDis(xid, cifs_sb->tcon);
3355                 if (rc == -EBUSY) {
3356                         FreeXid(xid);
3357                         return 0;
3358                 }
3359                 tconInfoFree(cifs_sb->tcon);
3360                 if ((ses) && (ses->server)) {
3361                         /* save off task so we do not refer to ses later */
3362                         cifsd_task = ses->server->tsk;
3363                         cFYI(1, ("About to do SMBLogoff "));
3364                         rc = CIFSSMBLogoff(xid, ses);
3365                         if (rc == -EBUSY) {
3366                                 FreeXid(xid);
3367                                 return 0;
3368                         } else if (rc == -ESHUTDOWN) {
3369                                 cFYI(1, ("Waking up socket by sending signal"));
3370                                 if (cifsd_task) {
3371                                         force_sig(SIGKILL,cifsd_task);
3372                                         kthread_stop(cifsd_task);
3373                                 }
3374                                 rc = 0;
3375                         } /* else - we have an smb session
3376                                 left on this socket do not kill cifsd */
3377                 } else
3378                         cFYI(1, ("No session or bad tcon"));
3379         }
3380
3381         cifs_sb->tcon = NULL;
3382         tmp = cifs_sb->prepath;
3383         cifs_sb->prepathlen = 0;
3384         cifs_sb->prepath = NULL;
3385         kfree(tmp);
3386         if (ses)
3387                 schedule_timeout_interruptible(msecs_to_jiffies(500));
3388         if (ses)
3389                 sesInfoFree(ses);
3390
3391         FreeXid(xid);
3392         return rc;              /* BB check if we should always return zero here */
3393 }
3394
3395 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3396                                            struct nls_table * nls_info)
3397 {
3398         int rc = 0;
3399         char ntlm_session_key[CIFS_SESS_KEY_SIZE];
3400         int ntlmv2_flag = FALSE;
3401         int first_time = 0;
3402
3403         /* what if server changes its buffer size after dropping the session? */
3404         if(pSesInfo->server->maxBuf == 0) /* no need to send on reconnect */ {
3405                 rc = CIFSSMBNegotiate(xid, pSesInfo);
3406                 if(rc == -EAGAIN) /* retry only once on 1st time connection */ {
3407                         rc = CIFSSMBNegotiate(xid, pSesInfo);
3408                         if(rc == -EAGAIN)
3409                                 rc = -EHOSTDOWN;
3410                 }
3411                 if(rc == 0) {
3412                         spin_lock(&GlobalMid_Lock);
3413                         if(pSesInfo->server->tcpStatus != CifsExiting)
3414                                 pSesInfo->server->tcpStatus = CifsGood;
3415                         else
3416                                 rc = -EHOSTDOWN;
3417                         spin_unlock(&GlobalMid_Lock);
3418
3419                 }
3420                 first_time = 1;
3421         }
3422         if (!rc) {
3423                 pSesInfo->flags = 0;
3424                 pSesInfo->capabilities = pSesInfo->server->capabilities;
3425                 if(linuxExtEnabled == 0)
3426                         pSesInfo->capabilities &= (~CAP_UNIX);
3427         /*      pSesInfo->sequence_number = 0;*/
3428                 cFYI(1,("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3429                         pSesInfo->server->secMode,
3430                         pSesInfo->server->capabilities,
3431                         pSesInfo->server->timeAdj));
3432                 if(experimEnabled < 2)
3433                         rc = CIFS_SessSetup(xid, pSesInfo,
3434                                             first_time, nls_info);
3435                 else if (extended_security
3436                                 && (pSesInfo->capabilities
3437                                         & CAP_EXTENDED_SECURITY)
3438                                 && (pSesInfo->server->secType == NTLMSSP)) {
3439                         rc = -EOPNOTSUPP;
3440                 } else if (extended_security
3441                            && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3442                            && (pSesInfo->server->secType == RawNTLMSSP)) {
3443                         cFYI(1, ("NTLMSSP sesssetup"));
3444                         rc = CIFSNTLMSSPNegotiateSessSetup(xid,
3445                                                 pSesInfo,
3446                                                 &ntlmv2_flag,
3447                                                 nls_info);
3448                         if (!rc) {
3449                                 if(ntlmv2_flag) {
3450                                         char * v2_response;
3451                                         cFYI(1, ("more secure NTLM ver2 hash"));
3452                                         if(CalcNTLMv2_partial_mac_key(pSesInfo,
3453                                                 nls_info)) {
3454                                                 rc = -ENOMEM;
3455                                                 goto ss_err_exit;
3456                                         } else
3457                                                 v2_response = kmalloc(16 + 64 /* blob */, GFP_KERNEL);
3458                                         if(v2_response) {
3459                                                 CalcNTLMv2_response(pSesInfo,v2_response);
3460                                 /*              if(first_time)
3461                                                         cifs_calculate_ntlmv2_mac_key(
3462                                                           pSesInfo->server->mac_signing_key,
3463                                                           response, ntlm_session_key, */
3464                                                 kfree(v2_response);
3465                                         /* BB Put dummy sig in SessSetup PDU? */
3466                                         } else {
3467                                                 rc = -ENOMEM;
3468                                                 goto ss_err_exit;
3469                                         }
3470
3471                                 } else {
3472                                         SMBNTencrypt(pSesInfo->password,
3473                                                 pSesInfo->server->cryptKey,
3474                                                 ntlm_session_key);
3475
3476                                         if(first_time)
3477                                                 cifs_calculate_mac_key(
3478                                                         pSesInfo->server->mac_signing_key,
3479                                                         ntlm_session_key,
3480                                                         pSesInfo->password);
3481                                 }
3482                         /* for better security the weaker lanman hash not sent
3483                            in AuthSessSetup so we no longer calculate it */
3484
3485                                 rc = CIFSNTLMSSPAuthSessSetup(xid,
3486                                         pSesInfo,
3487                                         ntlm_session_key,
3488                                         ntlmv2_flag,
3489                                         nls_info);
3490                         }
3491                 } else { /* old style NTLM 0.12 session setup */
3492                         SMBNTencrypt(pSesInfo->password,
3493                                 pSesInfo->server->cryptKey,
3494                                 ntlm_session_key);
3495
3496                         if(first_time)
3497                                 cifs_calculate_mac_key(
3498                                         pSesInfo->server->mac_signing_key,
3499                                         ntlm_session_key, pSesInfo->password);
3500
3501                         rc = CIFSSessSetup(xid, pSesInfo,
3502                                 ntlm_session_key, nls_info);
3503                 }
3504                 if (rc) {
3505                         cERROR(1,("Send error in SessSetup = %d",rc));
3506                 } else {
3507                         cFYI(1, ("CIFS Session Established successfully"));
3508                         pSesInfo->status = CifsGood;
3509                 }
3510         }
3511 ss_err_exit:
3512         return rc;
3513 }
3514