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   1 /*
   2  *   fs/cifs/connect.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2008
   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 no_linux_ext:1;
  89         unsigned sfu_emul:1;
  90         unsigned nullauth:1; /* attempt to authenticate with null user */
  91         unsigned nocase;     /* request case insensitive filenames */
  92         unsigned nobrl;      /* disable sending byte range locks to srv */
  93         unsigned int rsize;
  94         unsigned int wsize;
  95         unsigned int sockopt;
  96         unsigned short int port;
  97         char *prepath;
  98 };
  99
 100 static int ipv4_connect(struct sockaddr_in *psin_server,
 101                         struct socket **csocket,
 102                         char *netb_name,
 103                         char *server_netb_name);
 104 static int ipv6_connect(struct sockaddr_in6 *psin_server,
 105                         struct socket **csocket);
 106
 107
 108         /*
 109          * cifs tcp session reconnection
 110          *
 111          * mark tcp session as reconnecting so temporarily locked
 112          * mark all smb sessions as reconnecting for tcp session
 113          * reconnect tcp session
 114          * wake up waiters on reconnection? - (not needed currently)
 115          */
 116
 117 static int
 118 cifs_reconnect(struct TCP_Server_Info *server)
 119 {
 120         int rc = 0;
 121         struct list_head *tmp;
 122         struct cifsSesInfo *ses;
 123         struct cifsTconInfo *tcon;
 124         struct mid_q_entry *mid_entry;
 125
 126         spin_lock(&GlobalMid_Lock);
 127         if (kthread_should_stop()) {
 128                 /* the demux thread will exit normally
 129                 next time through the loop */
 130                 spin_unlock(&GlobalMid_Lock);
 131                 return rc;
 132         } else
 133                 server->tcpStatus = CifsNeedReconnect;
 134         spin_unlock(&GlobalMid_Lock);
 135         server->maxBuf = 0;
 136
 137         cFYI(1, ("Reconnecting tcp session"));
 138
 139         /* before reconnecting the tcp session, mark the smb session (uid)
 140                 and the tid bad so they are not used until reconnected */
 141         read_lock(&GlobalSMBSeslock);
 142         list_for_each(tmp, &GlobalSMBSessionList) {
 143                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
 144                 if (ses->server) {
 145                         if (ses->server == server) {
 146                                 ses->status = CifsNeedReconnect;
 147                                 ses->ipc_tid = 0;
 148                         }
 149                 }
 150                 /* else tcp and smb sessions need reconnection */
 151         }
 152         list_for_each(tmp, &GlobalTreeConnectionList) {
 153                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
 154                 if ((tcon) && (tcon->ses) && (tcon->ses->server == server))
 155                         tcon->tidStatus = CifsNeedReconnect;
 156         }
 157         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                 kernel_sock_shutdown(server->ssocket, SHUT_WR);
 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                 try_to_freeze();
 191                 if (server->protocolType == IPV6) {
 192                         rc = ipv6_connect(&server->addr.sockAddr6,
 193                                           &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 size 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", task_pid_nr(current)));
 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, length + cifs_min_rcv,
 362                                 GFP_KERNEL);
 363
 364         set_freezable();
 365         while (!kthread_should_stop()) {
 366                 if (try_to_freeze())
 367                         continue;
 368                 if (bigbuf == NULL) {
 369                         bigbuf = cifs_buf_get();
 370                         if (!bigbuf) {
 371                                 cERROR(1, ("No memory for large SMB response"));
 372                                 msleep(3000);
 373                                 /* retry will check if exiting */
 374                                 continue;
 375                         }
 376                 } else if (isLargeBuf) {
 377                         /* we are reusing a dirty large buf, clear its start */
 378                         memset(bigbuf, 0, sizeof(struct smb_hdr));
 379                 }
 380
 381                 if (smallbuf == NULL) {
 382                         smallbuf = cifs_small_buf_get();
 383                         if (!smallbuf) {
 384                                 cERROR(1, ("No memory for SMB response"));
 385                                 msleep(1000);
 386                                 /* retry will check if exiting */
 387                                 continue;
 388                         }
 389                         /* beginning of smb buffer is cleared in our buf_get */
 390                 } else /* if existing small buf clear beginning */
 391                         memset(smallbuf, 0, sizeof(struct smb_hdr));
 392
 393                 isLargeBuf = FALSE;
 394                 isMultiRsp = FALSE;
 395                 smb_buffer = smallbuf;
 396                 iov.iov_base = smb_buffer;
 397                 iov.iov_len = 4;
 398                 smb_msg.msg_control = NULL;
 399                 smb_msg.msg_controllen = 0;
 400                 pdu_length = 4; /* enough to get RFC1001 header */
 401 incomplete_rcv:
 402                 length =
 403                     kernel_recvmsg(csocket, &smb_msg,
 404                                 &iov, 1, pdu_length, 0 /* BB other flags? */);
 405
 406                 if (kthread_should_stop()) {
 407                         break;
 408                 } else if (server->tcpStatus == CifsNeedReconnect) {
 409                         cFYI(1, ("Reconnect after server stopped responding"));
 410                         cifs_reconnect(server);
 411                         cFYI(1, ("call to reconnect done"));
 412                         csocket = server->ssocket;
 413                         continue;
 414                 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
 415                         msleep(1); /* minimum sleep to prevent looping
 416                                 allowing socket to clear and app threads to set
 417                                 tcpStatus CifsNeedReconnect if server hung */
 418                         if (pdu_length < 4)
 419                                 goto incomplete_rcv;
 420                         else
 421                                 continue;
 422                 } else if (length <= 0) {
 423                         if (server->tcpStatus == CifsNew) {
 424                                 cFYI(1, ("tcp session abend after SMBnegprot"));
 425                                 /* some servers kill the TCP session rather than
 426                                    returning an SMB negprot error, in which
 427                                    case reconnecting here is not going to help,
 428                                    and so simply return error to mount */
 429                                 break;
 430                         }
 431                         if (!try_to_freeze() && (length == -EINTR)) {
 432                                 cFYI(1, ("cifsd thread killed"));
 433                                 break;
 434                         }
 435                         cFYI(1, ("Reconnect after unexpected peek error %d",
 436                                 length));
 437                         cifs_reconnect(server);
 438                         csocket = server->ssocket;
 439                         wake_up(&server->response_q);
 440                         continue;
 441                 } else if (length < pdu_length) {
 442                         cFYI(1, ("requested %d bytes but only got %d bytes",
 443                                   pdu_length, length));
 444                         pdu_length -= length;
 445                         msleep(1);
 446                         goto incomplete_rcv;
 447                 }
 448
 449                 /* The right amount was read from socket - 4 bytes */
 450                 /* so we can now interpret the length field */
 451
 452                 /* the first byte big endian of the length field,
 453                 is actually not part of the length but the type
 454                 with the most common, zero, as regular data */
 455                 temp = *((char *) smb_buffer);
 456
 457                 /* Note that FC 1001 length is big endian on the wire,
 458                 but we convert it here so it is always manipulated
 459                 as host byte order */
 460                 pdu_length = ntohl(smb_buffer->smb_buf_length);
 461                 smb_buffer->smb_buf_length = pdu_length;
 462
 463                 cFYI(1, ("rfc1002 length 0x%x", pdu_length+4));
 464
 465                 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
 466                         continue;
 467                 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
 468                         cFYI(1, ("Good RFC 1002 session rsp"));
 469                         continue;
 470                 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
 471                         /* we get this from Windows 98 instead of
 472                            an error on SMB negprot response */
 473                         cFYI(1, ("Negative RFC1002 Session Response Error 0x%x)",
 474                                 pdu_length));
 475                         if (server->tcpStatus == CifsNew) {
 476                                 /* if nack on negprot (rather than
 477                                 ret of smb negprot error) reconnecting
 478                                 not going to help, ret error to mount */
 479                                 break;
 480                         } else {
 481                                 /* give server a second to
 482                                 clean up before reconnect attempt */
 483                                 msleep(1000);
 484                                 /* always try 445 first on reconnect
 485                                 since we get NACK on some if we ever
 486                                 connected to port 139 (the NACK is
 487                                 since we do not begin with RFC1001
 488                                 session initialize frame) */
 489                                 server->addr.sockAddr.sin_port =
 490                                         htons(CIFS_PORT);
 491                                 cifs_reconnect(server);
 492                                 csocket = server->ssocket;
 493                                 wake_up(&server->response_q);
 494                                 continue;
 495                         }
 496                 } else if (temp != (char) 0) {
 497                         cERROR(1, ("Unknown RFC 1002 frame"));
 498                         cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
 499                                       length);
 500                         cifs_reconnect(server);
 501                         csocket = server->ssocket;
 502                         continue;
 503                 }
 504
 505                 /* else we have an SMB response */
 506                 if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
 507                             (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) {
 508                         cERROR(1, ("Invalid size SMB length %d pdu_length %d",
 509                                         length, pdu_length+4));
 510                         cifs_reconnect(server);
 511                         csocket = server->ssocket;
 512                         wake_up(&server->response_q);
 513                         continue;
 514                 }
 515
 516                 /* else length ok */
 517                 reconnect = 0;
 518
 519                 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
 520                         isLargeBuf = TRUE;
 521                         memcpy(bigbuf, smallbuf, 4);
 522                         smb_buffer = bigbuf;
 523                 }
 524                 length = 0;
 525                 iov.iov_base = 4 + (char *)smb_buffer;
 526                 iov.iov_len = pdu_length;
 527                 for (total_read = 0; total_read < pdu_length;
 528                      total_read += length) {
 529                         length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
 530                                                 pdu_length - total_read, 0);
 531                         if (kthread_should_stop() ||
 532                             (length == -EINTR)) {
 533                                 /* then will exit */
 534                                 reconnect = 2;
 535                                 break;
 536                         } else if (server->tcpStatus == CifsNeedReconnect) {
 537                                 cifs_reconnect(server);
 538                                 csocket = server->ssocket;
 539                                 /* Reconnect wakes up rspns q */
 540                                 /* Now we will reread sock */
 541                                 reconnect = 1;
 542                                 break;
 543                         } else if ((length == -ERESTARTSYS) ||
 544                                    (length == -EAGAIN)) {
 545                                 msleep(1); /* minimum sleep to prevent looping,
 546                                               allowing socket to clear and app
 547                                               threads to set tcpStatus
 548                                               CifsNeedReconnect if server hung*/
 549                                 length = 0;
 550                                 continue;
 551                         } else if (length <= 0) {
 552                                 cERROR(1, ("Received no data, expecting %d",
 553                                               pdu_length - total_read));
 554                                 cifs_reconnect(server);
 555                                 csocket = server->ssocket;
 556                                 reconnect = 1;
 557                                 break;
 558                         }
 559                 }
 560                 if (reconnect == 2)
 561                         break;
 562                 else if (reconnect == 1)
 563                         continue;
 564
 565                 length += 4; /* account for rfc1002 hdr */
 566
 567
 568                 dump_smb(smb_buffer, length);
 569                 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
 570                         cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
 571                         continue;
 572                 }
 573
 574
 575                 task_to_wake = NULL;
 576                 spin_lock(&GlobalMid_Lock);
 577                 list_for_each(tmp, &server->pending_mid_q) {
 578                         mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 579
 580                         if ((mid_entry->mid == smb_buffer->Mid) &&
 581                             (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
 582                             (mid_entry->command == smb_buffer->Command)) {
 583                                 if (check2ndT2(smb_buffer,server->maxBuf) > 0) {
 584                                         /* We have a multipart transact2 resp */
 585                                         isMultiRsp = TRUE;
 586                                         if (mid_entry->resp_buf) {
 587                                                 /* merge response - fix up 1st*/
 588                                                 if (coalesce_t2(smb_buffer,
 589                                                         mid_entry->resp_buf)) {
 590                                                         mid_entry->multiRsp = 1;
 591                                                         break;
 592                                                 } else {
 593                                                         /* all parts received */
 594                                                         mid_entry->multiEnd = 1;
 595                                                         goto multi_t2_fnd;
 596                                                 }
 597                                         } else {
 598                                                 if (!isLargeBuf) {
 599                                                         cERROR(1,("1st trans2 resp needs bigbuf"));
 600                                         /* BB maybe we can fix this up,  switch
 601                                            to already allocated large buffer? */
 602                                                 } else {
 603                                                         /* Have first buffer */
 604                                                         mid_entry->resp_buf =
 605                                                                  smb_buffer;
 606                                                         mid_entry->largeBuf = 1;
 607                                                         bigbuf = NULL;
 608                                                 }
 609                                         }
 610                                         break;
 611                                 }
 612                                 mid_entry->resp_buf = smb_buffer;
 613                                 if (isLargeBuf)
 614                                         mid_entry->largeBuf = 1;
 615                                 else
 616                                         mid_entry->largeBuf = 0;
 617 multi_t2_fnd:
 618                                 task_to_wake = mid_entry->tsk;
 619                                 mid_entry->midState = MID_RESPONSE_RECEIVED;
 620 #ifdef CONFIG_CIFS_STATS2
 621                                 mid_entry->when_received = jiffies;
 622 #endif
 623                                 /* so we do not time out requests to  server
 624                                 which is still responding (since server could
 625                                 be busy but not dead) */
 626                                 server->lstrp = jiffies;
 627                                 break;
 628                         }
 629                 }
 630                 spin_unlock(&GlobalMid_Lock);
 631                 if (task_to_wake) {
 632                         /* Was previous buf put in mpx struct for multi-rsp? */
 633                         if (!isMultiRsp) {
 634                                 /* smb buffer will be freed by user thread */
 635                                 if (isLargeBuf)
 636                                         bigbuf = NULL;
 637                                 else
 638                                         smallbuf = NULL;
 639                         }
 640                         wake_up_process(task_to_wake);
 641                 } else if ((is_valid_oplock_break(smb_buffer, server) == FALSE)
 642                     && (isMultiRsp == FALSE)) {
 643                         cERROR(1, ("No task to wake, unknown frame received! "
 644                                    "NumMids %d", midCount.counter));
 645                         cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
 646                                       sizeof(struct smb_hdr));
 647 #ifdef CONFIG_CIFS_DEBUG2
 648                         cifs_dump_detail(smb_buffer);
 649                         cifs_dump_mids(server);
 650 #endif /* CIFS_DEBUG2 */
 651
 652                 }
 653         } /* end while !EXITING */
 654
 655         spin_lock(&GlobalMid_Lock);
 656         server->tcpStatus = CifsExiting;
 657         server->tsk = NULL;
 658         /* check if we have blocked requests that need to free */
 659         /* Note that cifs_max_pending is normally 50, but
 660         can be set at module install time to as little as two */
 661         if (atomic_read(&server->inFlight) >= cifs_max_pending)
 662                 atomic_set(&server->inFlight, cifs_max_pending - 1);
 663         /* We do not want to set the max_pending too low or we
 664         could end up with the counter going negative */
 665         spin_unlock(&GlobalMid_Lock);
 666         /* Although there should not be any requests blocked on
 667         this queue it can not hurt to be paranoid and try to wake up requests
 668         that may haven been blocked when more than 50 at time were on the wire
 669         to the same server - they now will see the session is in exit state
 670         and get out of SendReceive.  */
 671         wake_up_all(&server->request_q);
 672         /* give those requests time to exit */
 673         msleep(125);
 674
 675         if (server->ssocket) {
 676                 sock_release(csocket);
 677                 server->ssocket = NULL;
 678         }
 679         /* buffer usuallly freed in free_mid - need to free it here on exit */
 680         cifs_buf_release(bigbuf);
 681         if (smallbuf) /* no sense logging a debug message if NULL */
 682                 cifs_small_buf_release(smallbuf);
 683
 684         read_lock(&GlobalSMBSeslock);
 685         if (list_empty(&server->pending_mid_q)) {
 686                 /* loop through server session structures attached to this and
 687                     mark them dead */
 688                 list_for_each(tmp, &GlobalSMBSessionList) {
 689                         ses =
 690                             list_entry(tmp, struct cifsSesInfo,
 691                                        cifsSessionList);
 692                         if (ses->server == server) {
 693                                 ses->status = CifsExiting;
 694                                 ses->server = NULL;
 695                         }
 696                 }
 697                 read_unlock(&GlobalSMBSeslock);
 698         } else {
 699                 /* although we can not zero the server struct pointer yet,
 700                 since there are active requests which may depnd on them,
 701                 mark the corresponding SMB sessions as exiting too */
 702                 list_for_each(tmp, &GlobalSMBSessionList) {
 703                         ses = list_entry(tmp, struct cifsSesInfo,
 704                                          cifsSessionList);
 705                         if (ses->server == server)
 706                                 ses->status = CifsExiting;
 707                 }
 708
 709                 spin_lock(&GlobalMid_Lock);
 710                 list_for_each(tmp, &server->pending_mid_q) {
 711                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 712                         if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
 713                                 cFYI(1, ("Clearing Mid 0x%x - waking up ",
 714                                          mid_entry->mid));
 715                                 task_to_wake = mid_entry->tsk;
 716                                 if (task_to_wake)
 717                                         wake_up_process(task_to_wake);
 718                         }
 719                 }
 720                 spin_unlock(&GlobalMid_Lock);
 721                 read_unlock(&GlobalSMBSeslock);
 722                 /* 1/8th of sec is more than enough time for them to exit */
 723                 msleep(125);
 724         }
 725
 726         if (!list_empty(&server->pending_mid_q)) {
 727                 /* mpx threads have not exited yet give them
 728                 at least the smb send timeout time for long ops */
 729                 /* due to delays on oplock break requests, we need
 730                 to wait at least 45 seconds before giving up
 731                 on a request getting a response and going ahead
 732                 and killing cifsd */
 733                 cFYI(1, ("Wait for exit from demultiplex thread"));
 734                 msleep(46000);
 735                 /* if threads still have not exited they are probably never
 736                 coming home not much else we can do but free the memory */
 737         }
 738
 739         write_lock(&GlobalSMBSeslock);
 740         atomic_dec(&tcpSesAllocCount);
 741         length = tcpSesAllocCount.counter;
 742
 743         /* last chance to mark ses pointers invalid
 744         if there are any pointing to this (e.g
 745         if a crazy root user tried to kill cifsd
 746         kernel thread explicitly this might happen) */
 747         list_for_each(tmp, &GlobalSMBSessionList) {
 748                 ses = list_entry(tmp, struct cifsSesInfo,
 749                                 cifsSessionList);
 750                 if (ses->server == server)
 751                         ses->server = NULL;
 752         }
 753         write_unlock(&GlobalSMBSeslock);
 754
 755         kfree(server->hostname);
 756         kfree(server);
 757         if (length  > 0)
 758                 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
 759                                 GFP_KERNEL);
 760
 761         return 0;
 762 }
 763
 764 /* extract the host portion of the UNC string */
 765 static char *
 766 extract_hostname(const char *unc)
 767 {
 768         const char *src;
 769         char *dst, *delim;
 770         unsigned int len;
 771
 772         /* skip double chars at beginning of string */
 773         /* BB: check validity of these bytes? */
 774         src = unc + 2;
 775
 776         /* delimiter between hostname and sharename is always '\\' now */
 777         delim = strchr(src, '\\');
 778         if (!delim)
 779                 return ERR_PTR(-EINVAL);
 780
 781         len = delim - src;
 782         dst = kmalloc((len + 1), GFP_KERNEL);
 783         if (dst == NULL)
 784                 return ERR_PTR(-ENOMEM);
 785
 786         memcpy(dst, src, len);
 787         dst[len] = '\0';
 788
 789         return dst;
 790 }
 791
 792 static int
 793 cifs_parse_mount_options(char *options, const char *devname,
 794                          struct smb_vol *vol)
 795 {
 796         char *value;
 797         char *data;
 798         unsigned int  temp_len, i, j;
 799         char separator[2];
 800
 801         separator[0] = ',';
 802         separator[1] = 0;
 803
 804         if (Local_System_Name[0] != 0)
 805                 memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
 806         else {
 807                 char *nodename = utsname()->nodename;
 808                 int n = strnlen(nodename, 15);
 809                 memset(vol->source_rfc1001_name, 0x20, 15);
 810                 for (i = 0; i < n; i++) {
 811                         /* does not have to be perfect mapping since field is
 812                         informational, only used for servers that do not support
 813                         port 445 and it can be overridden at mount time */
 814                         vol->source_rfc1001_name[i] = toupper(nodename[i]);
 815                 }
 816         }
 817         vol->source_rfc1001_name[15] = 0;
 818         /* null target name indicates to use *SMBSERVR default called name
 819            if we end up sending RFC1001 session initialize */
 820         vol->target_rfc1001_name[0] = 0;
 821         vol->linux_uid = current->uid;  /* current->euid instead? */
 822         vol->linux_gid = current->gid;
 823         vol->dir_mode = S_IRWXUGO;
 824         /* 2767 perms indicate mandatory locking support */
 825         vol->file_mode = (S_IRWXUGO | S_ISGID) & (~S_IXGRP);
 826
 827         /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
 828         vol->rw = TRUE;
 829         /* default is always to request posix paths. */
 830         vol->posix_paths = 1;
 831
 832         if (!options)
 833                 return 1;
 834
 835         if (strncmp(options, "sep=", 4) == 0) {
 836                 if (options[4] != 0) {
 837                         separator[0] = options[4];
 838                         options += 5;
 839                 } else {
 840                         cFYI(1, ("Null separator not allowed"));
 841                 }
 842         }
 843
 844         while ((data = strsep(&options, separator)) != NULL) {
 845                 if (!*data)
 846                         continue;
 847                 if ((value = strchr(data, '=')) != NULL)
 848                         *value++ = '\0';
 849
 850                 /* Have to parse this before we parse for "user" */
 851                 if (strnicmp(data, "user_xattr", 10) == 0) {
 852                         vol->no_xattr = 0;
 853                 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
 854                         vol->no_xattr = 1;
 855                 } else if (strnicmp(data, "user", 4) == 0) {
 856                         if (!value) {
 857                                 printk(KERN_WARNING
 858                                        "CIFS: invalid or missing username\n");
 859                                 return 1;       /* needs_arg; */
 860                         } else if (!*value) {
 861                                 /* null user, ie anonymous, authentication */
 862                                 vol->nullauth = 1;
 863                         }
 864                         if (strnlen(value, 200) < 200) {
 865                                 vol->username = value;
 866                         } else {
 867                                 printk(KERN_WARNING "CIFS: username too long\n");
 868                                 return 1;
 869                         }
 870                 } else if (strnicmp(data, "pass", 4) == 0) {
 871                         if (!value) {
 872                                 vol->password = NULL;
 873                                 continue;
 874                         } else if (value[0] == 0) {
 875                                 /* check if string begins with double comma
 876                                    since that would mean the password really
 877                                    does start with a comma, and would not
 878                                    indicate an empty string */
 879                                 if (value[1] != separator[0]) {
 880                                         vol->password = NULL;
 881                                         continue;
 882                                 }
 883                         }
 884                         temp_len = strlen(value);
 885                         /* removed password length check, NTLM passwords
 886                                 can be arbitrarily long */
 887
 888                         /* if comma in password, the string will be
 889                         prematurely null terminated.  Commas in password are
 890                         specified across the cifs mount interface by a double
 891                         comma ie ,, and a comma used as in other cases ie ','
 892                         as a parameter delimiter/separator is single and due
 893                         to the strsep above is temporarily zeroed. */
 894
 895                         /* NB: password legally can have multiple commas and
 896                         the only illegal character in a password is null */
 897
 898                         if ((value[temp_len] == 0) &&
 899                             (value[temp_len+1] == separator[0])) {
 900                                 /* reinsert comma */
 901                                 value[temp_len] = separator[0];
 902                                 temp_len += 2;  /* move after second comma */
 903                                 while (value[temp_len] != 0)  {
 904                                         if (value[temp_len] == separator[0]) {
 905                                                 if (value[temp_len+1] ==
 906                                                      separator[0]) {
 907                                                 /* skip second comma */
 908                                                         temp_len++;
 909                                                 } else {
 910                                                 /* single comma indicating start
 911                                                          of next parm */
 912                                                         break;
 913                                                 }
 914                                         }
 915                                         temp_len++;
 916                                 }
 917                                 if (value[temp_len] == 0) {
 918                                         options = NULL;
 919                                 } else {
 920                                         value[temp_len] = 0;
 921                                         /* point option to start of next parm */
 922                                         options = value + temp_len + 1;
 923                                 }
 924                                 /* go from value to value + temp_len condensing
 925                                 double commas to singles. Note that this ends up
 926                                 allocating a few bytes too many, which is ok */
 927                                 vol->password = kzalloc(temp_len, GFP_KERNEL);
 928                                 if (vol->password == NULL) {
 929                                         printk(KERN_WARNING "CIFS: no memory "
 930                                                             "for password\n");
 931                                         return 1;
 932                                 }
 933                                 for (i = 0, j = 0; i < temp_len; i++, j++) {
 934                                         vol->password[j] = value[i];
 935                                         if (value[i] == separator[0]
 936                                                 && value[i+1] == separator[0]) {
 937                                                 /* skip second comma */
 938                                                 i++;
 939                                         }
 940                                 }
 941                                 vol->password[j] = 0;
 942                         } else {
 943                                 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
 944                                 if (vol->password == NULL) {
 945                                         printk(KERN_WARNING "CIFS: no memory "
 946                                                             "for password\n");
 947                                         return 1;
 948                                 }
 949                                 strcpy(vol->password, value);
 950                         }
 951                 } else if (strnicmp(data, "ip", 2) == 0) {
 952                         if (!value || !*value) {
 953                                 vol->UNCip = NULL;
 954                         } else if (strnlen(value, 35) < 35) {
 955                                 vol->UNCip = value;
 956                         } else {
 957                                 printk(KERN_WARNING "CIFS: ip address "
 958                                                     "too long\n");
 959                                 return 1;
 960                         }
 961                 } else if (strnicmp(data, "sec", 3) == 0) {
 962                         if (!value || !*value) {
 963                                 cERROR(1, ("no security value specified"));
 964                                 continue;
 965                         } else if (strnicmp(value, "krb5i", 5) == 0) {
 966                                 vol->secFlg |= CIFSSEC_MAY_KRB5 |
 967                                         CIFSSEC_MUST_SIGN;
 968                         } else if (strnicmp(value, "krb5p", 5) == 0) {
 969                                 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
 970                                         CIFSSEC_MAY_KRB5; */
 971                                 cERROR(1, ("Krb5 cifs privacy not supported"));
 972                                 return 1;
 973                         } else if (strnicmp(value, "krb5", 4) == 0) {
 974                                 vol->secFlg |= CIFSSEC_MAY_KRB5;
 975                         } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
 976                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
 977                                         CIFSSEC_MUST_SIGN;
 978                         } else if (strnicmp(value, "ntlmv2", 6) == 0) {
 979                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
 980                         } else if (strnicmp(value, "ntlmi", 5) == 0) {
 981                                 vol->secFlg |= CIFSSEC_MAY_NTLM |
 982                                         CIFSSEC_MUST_SIGN;
 983                         } else if (strnicmp(value, "ntlm", 4) == 0) {
 984                                 /* ntlm is default so can be turned off too */
 985                                 vol->secFlg |= CIFSSEC_MAY_NTLM;
 986                         } else if (strnicmp(value, "nontlm", 6) == 0) {
 987                                 /* BB is there a better way to do this? */
 988                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
 989 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 990                         } else if (strnicmp(value, "lanman", 6) == 0) {
 991                                 vol->secFlg |= CIFSSEC_MAY_LANMAN;
 992 #endif
 993                         } else if (strnicmp(value, "none", 4) == 0) {
 994                                 vol->nullauth = 1;
 995                         } else {
 996                                 cERROR(1, ("bad security option: %s", value));
 997                                 return 1;
 998                         }
 999                 } else if ((strnicmp(data, "unc", 3) == 0)
1000                            || (strnicmp(data, "target", 6) == 0)
1001                            || (strnicmp(data, "path", 4) == 0)) {
1002                         if (!value || !*value) {
1003                                 printk(KERN_WARNING "CIFS: invalid path to "
1004                                                     "network resource\n");
1005                                 return 1;       /* needs_arg; */
1006                         }
1007                         if ((temp_len = strnlen(value, 300)) < 300) {
1008                                 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1009                                 if (vol->UNC == NULL)
1010                                         return 1;
1011                                 strcpy(vol->UNC, value);
1012                                 if (strncmp(vol->UNC, "//", 2) == 0) {
1013                                         vol->UNC[0] = '\\';
1014                                         vol->UNC[1] = '\\';
1015                                 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1016                                         printk(KERN_WARNING
1017                                                "CIFS: UNC Path does not begin "
1018                                                "with // or \\\\ \n");
1019                                         return 1;
1020                                 }
1021                         } else {
1022                                 printk(KERN_WARNING "CIFS: UNC name too long\n");
1023                                 return 1;
1024                         }
1025                 } else if ((strnicmp(data, "domain", 3) == 0)
1026                            || (strnicmp(data, "workgroup", 5) == 0)) {
1027                         if (!value || !*value) {
1028                                 printk(KERN_WARNING "CIFS: invalid domain name\n");
1029                                 return 1;       /* needs_arg; */
1030                         }
1031                         /* BB are there cases in which a comma can be valid in
1032                         a domain name and need special handling? */
1033                         if (strnlen(value, 256) < 256) {
1034                                 vol->domainname = value;
1035                                 cFYI(1, ("Domain name set"));
1036                         } else {
1037                                 printk(KERN_WARNING "CIFS: domain name too "
1038                                                     "long\n");
1039                                 return 1;
1040                         }
1041                 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1042                         if (!value || !*value) {
1043                                 printk(KERN_WARNING
1044                                         "CIFS: invalid path prefix\n");
1045                                 return 1;       /* needs_argument */
1046                         }
1047                         if ((temp_len = strnlen(value, 1024)) < 1024) {
1048                                 if (value[0] != '/')
1049                                         temp_len++;  /* missing leading slash */
1050                                 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1051                                 if (vol->prepath == NULL)
1052                                         return 1;
1053                                 if (value[0] != '/') {
1054                                         vol->prepath[0] = '/';
1055                                         strcpy(vol->prepath+1, value);
1056                                 } else
1057                                         strcpy(vol->prepath, value);
1058                                 cFYI(1, ("prefix path %s", vol->prepath));
1059                         } else {
1060                                 printk(KERN_WARNING "CIFS: prefix too long\n");
1061                                 return 1;
1062                         }
1063                 } else if (strnicmp(data, "iocharset", 9) == 0) {
1064                         if (!value || !*value) {
1065                                 printk(KERN_WARNING "CIFS: invalid iocharset "
1066                                                     "specified\n");
1067                                 return 1;       /* needs_arg; */
1068                         }
1069                         if (strnlen(value, 65) < 65) {
1070                                 if (strnicmp(value, "default", 7))
1071                                         vol->iocharset = value;
1072                                 /* if iocharset not set then load_nls_default
1073                                    is used by caller */
1074                                 cFYI(1, ("iocharset set to %s", value));
1075                         } else {
1076                                 printk(KERN_WARNING "CIFS: iocharset name "
1077                                                     "too long.\n");
1078                                 return 1;
1079                         }
1080                 } else if (strnicmp(data, "uid", 3) == 0) {
1081                         if (value && *value) {
1082                                 vol->linux_uid =
1083                                         simple_strtoul(value, &value, 0);
1084                                 vol->override_uid = 1;
1085                         }
1086                 } else if (strnicmp(data, "gid", 3) == 0) {
1087                         if (value && *value) {
1088                                 vol->linux_gid =
1089                                         simple_strtoul(value, &value, 0);
1090                                 vol->override_gid = 1;
1091                         }
1092                 } else if (strnicmp(data, "file_mode", 4) == 0) {
1093                         if (value && *value) {
1094                                 vol->file_mode =
1095                                         simple_strtoul(value, &value, 0);
1096                         }
1097                 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1098                         if (value && *value) {
1099                                 vol->dir_mode =
1100                                         simple_strtoul(value, &value, 0);
1101                         }
1102                 } else if (strnicmp(data, "dirmode", 4) == 0) {
1103                         if (value && *value) {
1104                                 vol->dir_mode =
1105                                         simple_strtoul(value, &value, 0);
1106                         }
1107                 } else if (strnicmp(data, "port", 4) == 0) {
1108                         if (value && *value) {
1109                                 vol->port =
1110                                         simple_strtoul(value, &value, 0);
1111                         }
1112                 } else if (strnicmp(data, "rsize", 5) == 0) {
1113                         if (value && *value) {
1114                                 vol->rsize =
1115                                         simple_strtoul(value, &value, 0);
1116                         }
1117                 } else if (strnicmp(data, "wsize", 5) == 0) {
1118                         if (value && *value) {
1119                                 vol->wsize =
1120                                         simple_strtoul(value, &value, 0);
1121                         }
1122                 } else if (strnicmp(data, "sockopt", 5) == 0) {
1123                         if (value && *value) {
1124                                 vol->sockopt =
1125                                         simple_strtoul(value, &value, 0);
1126                         }
1127                 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1128                         if (!value || !*value || (*value == ' ')) {
1129                                 cFYI(1, ("invalid (empty) netbiosname"));
1130                         } else {
1131                                 memset(vol->source_rfc1001_name, 0x20, 15);
1132                                 for (i = 0; i < 15; i++) {
1133                                 /* BB are there cases in which a comma can be
1134                                 valid in this workstation netbios name (and need
1135                                 special handling)? */
1136
1137                                 /* We do not uppercase netbiosname for user */
1138                                         if (value[i] == 0)
1139                                                 break;
1140                                         else
1141                                                 vol->source_rfc1001_name[i] =
1142                                                                 value[i];
1143                                 }
1144                                 /* The string has 16th byte zero still from
1145                                 set at top of the function  */
1146                                 if ((i == 15) && (value[i] != 0))
1147                                         printk(KERN_WARNING "CIFS: netbiosname"
1148                                                 " longer than 15 truncated.\n");
1149                         }
1150                 } else if (strnicmp(data, "servern", 7) == 0) {
1151                         /* servernetbiosname specified override *SMBSERVER */
1152                         if (!value || !*value || (*value == ' ')) {
1153                                 cFYI(1, ("empty server netbiosname specified"));
1154                         } else {
1155                                 /* last byte, type, is 0x20 for servr type */
1156                                 memset(vol->target_rfc1001_name, 0x20, 16);
1157
1158                                 for (i = 0; i < 15; i++) {
1159                                 /* BB are there cases in which a comma can be
1160                                    valid in this workstation netbios name
1161                                    (and need special handling)? */
1162
1163                                 /* user or mount helper must uppercase
1164                                    the netbiosname */
1165                                         if (value[i] == 0)
1166                                                 break;
1167                                         else
1168                                                 vol->target_rfc1001_name[i] =
1169                                                                 value[i];
1170                                 }
1171                                 /* The string has 16th byte zero still from
1172                                    set at top of the function  */
1173                                 if ((i == 15) && (value[i] != 0))
1174                                         printk(KERN_WARNING "CIFS: server net"
1175                                         "biosname longer than 15 truncated.\n");
1176                         }
1177                 } else if (strnicmp(data, "credentials", 4) == 0) {
1178                         /* ignore */
1179                 } else if (strnicmp(data, "version", 3) == 0) {
1180                         /* ignore */
1181                 } else if (strnicmp(data, "guest", 5) == 0) {
1182                         /* ignore */
1183                 } else if (strnicmp(data, "rw", 2) == 0) {
1184                         vol->rw = TRUE;
1185                 } else if ((strnicmp(data, "suid", 4) == 0) ||
1186                                    (strnicmp(data, "nosuid", 6) == 0) ||
1187                                    (strnicmp(data, "exec", 4) == 0) ||
1188                                    (strnicmp(data, "noexec", 6) == 0) ||
1189                                    (strnicmp(data, "nodev", 5) == 0) ||
1190                                    (strnicmp(data, "noauto", 6) == 0) ||
1191                                    (strnicmp(data, "dev", 3) == 0)) {
1192                         /*  The mount tool or mount.cifs helper (if present)
1193                             uses these opts to set flags, and the flags are read
1194                             by the kernel vfs layer before we get here (ie
1195                             before read super) so there is no point trying to
1196                             parse these options again and set anything and it
1197                             is ok to just ignore them */
1198                         continue;
1199                 } else if (strnicmp(data, "ro", 2) == 0) {
1200                         vol->rw = FALSE;
1201                 } else if (strnicmp(data, "hard", 4) == 0) {
1202                         vol->retry = 1;
1203                 } else if (strnicmp(data, "soft", 4) == 0) {
1204                         vol->retry = 0;
1205                 } else if (strnicmp(data, "perm", 4) == 0) {
1206                         vol->noperm = 0;
1207                 } else if (strnicmp(data, "noperm", 6) == 0) {
1208                         vol->noperm = 1;
1209                 } else if (strnicmp(data, "mapchars", 8) == 0) {
1210                         vol->remap = 1;
1211                 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1212                         vol->remap = 0;
1213                 } else if (strnicmp(data, "sfu", 3) == 0) {
1214                         vol->sfu_emul = 1;
1215                 } else if (strnicmp(data, "nosfu", 5) == 0) {
1216                         vol->sfu_emul = 0;
1217                 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1218                         vol->posix_paths = 1;
1219                 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1220                         vol->posix_paths = 0;
1221                 } else if (strnicmp(data, "nounix", 6) == 0) {
1222                         vol->no_linux_ext = 1;
1223                 } else if (strnicmp(data, "nolinux", 7) == 0) {
1224                         vol->no_linux_ext = 1;
1225                 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1226                            (strnicmp(data, "ignorecase", 10)  == 0)) {
1227                         vol->nocase = 1;
1228                 } else if (strnicmp(data, "brl", 3) == 0) {
1229                         vol->nobrl =  0;
1230                 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1231                            (strnicmp(data, "nolock", 6) == 0)) {
1232                         vol->nobrl =  1;
1233                         /* turn off mandatory locking in mode
1234                         if remote locking is turned off since the
1235                         local vfs will do advisory */
1236                         if (vol->file_mode ==
1237                                 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1238                                 vol->file_mode = S_IALLUGO;
1239                 } else if (strnicmp(data, "setuids", 7) == 0) {
1240                         vol->setuids = 1;
1241                 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1242                         vol->setuids = 0;
1243                 } else if (strnicmp(data, "nohard", 6) == 0) {
1244                         vol->retry = 0;
1245                 } else if (strnicmp(data, "nosoft", 6) == 0) {
1246                         vol->retry = 1;
1247                 } else if (strnicmp(data, "nointr", 6) == 0) {
1248                         vol->intr = 0;
1249                 } else if (strnicmp(data, "intr", 4) == 0) {
1250                         vol->intr = 1;
1251                 } else if (strnicmp(data, "serverino", 7) == 0) {
1252                         vol->server_ino = 1;
1253                 } else if (strnicmp(data, "noserverino", 9) == 0) {
1254                         vol->server_ino = 0;
1255                 } else if (strnicmp(data, "cifsacl", 7) == 0) {
1256                         vol->cifs_acl = 1;
1257                 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1258                         vol->cifs_acl = 0;
1259                 } else if (strnicmp(data, "acl", 3) == 0) {
1260                         vol->no_psx_acl = 0;
1261                 } else if (strnicmp(data, "noacl", 5) == 0) {
1262                         vol->no_psx_acl = 1;
1263                 } else if (strnicmp(data, "sign", 4) == 0) {
1264                         vol->secFlg |= CIFSSEC_MUST_SIGN;
1265 /*              } else if (strnicmp(data, "seal",4) == 0) {
1266                         vol->secFlg |= CIFSSEC_MUST_SEAL; */
1267                 } else if (strnicmp(data, "direct", 6) == 0) {
1268                         vol->direct_io = 1;
1269                 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
1270                         vol->direct_io = 1;
1271                 } else if (strnicmp(data, "in6_addr", 8) == 0) {
1272                         if (!value || !*value) {
1273                                 vol->in6_addr = NULL;
1274                         } else if (strnlen(value, 49) == 48) {
1275                                 vol->in6_addr = value;
1276                         } else {
1277                                 printk(KERN_WARNING "CIFS: ip v6 address not "
1278                                                     "48 characters long\n");
1279                                 return 1;
1280                         }
1281                 } else if (strnicmp(data, "noac", 4) == 0) {
1282                         printk(KERN_WARNING "CIFS: Mount option noac not "
1283                                 "supported. Instead set "
1284                                 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1285                 } else
1286                         printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1287                                                 data);
1288         }
1289         if (vol->UNC == NULL) {
1290                 if (devname == NULL) {
1291                         printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1292                                                 "target\n");
1293                         return 1;
1294                 }
1295                 if ((temp_len = strnlen(devname, 300)) < 300) {
1296                         vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1297                         if (vol->UNC == NULL)
1298                                 return 1;
1299                         strcpy(vol->UNC, devname);
1300                         if (strncmp(vol->UNC, "//", 2) == 0) {
1301                                 vol->UNC[0] = '\\';
1302                                 vol->UNC[1] = '\\';
1303                         } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1304                                 printk(KERN_WARNING "CIFS: UNC Path does not "
1305                                                     "begin with // or \\\\ \n");
1306                                 return 1;
1307                         }
1308                 } else {
1309                         printk(KERN_WARNING "CIFS: UNC name too long\n");
1310                         return 1;
1311                 }
1312         }
1313         if (vol->UNCip == NULL)
1314                 vol->UNCip = &vol->UNC[2];
1315
1316         return 0;
1317 }
1318
1319 static struct cifsSesInfo *
1320 cifs_find_tcp_session(struct in_addr *target_ip_addr,
1321                 struct in6_addr *target_ip6_addr,
1322                  char *userName, struct TCP_Server_Info **psrvTcp)
1323 {
1324         struct list_head *tmp;
1325         struct cifsSesInfo *ses;
1326         *psrvTcp = NULL;
1327         read_lock(&GlobalSMBSeslock);
1328
1329         list_for_each(tmp, &GlobalSMBSessionList) {
1330                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
1331                 if (ses->server) {
1332                         if ((target_ip_addr &&
1333                                 (ses->server->addr.sockAddr.sin_addr.s_addr
1334                                   == target_ip_addr->s_addr)) || (target_ip6_addr
1335                                 && memcmp(&ses->server->addr.sockAddr6.sin6_addr,
1336                                         target_ip6_addr, sizeof(*target_ip6_addr)))) {
1337                                 /* BB lock server and tcp session and increment
1338                                       use count here?? */
1339
1340                                 /* found a match on the TCP session */
1341                                 *psrvTcp = ses->server;
1342
1343                                 /* BB check if reconnection needed */
1344                                 if (strncmp
1345                                     (ses->userName, userName,
1346                                      MAX_USERNAME_SIZE) == 0){
1347                                         read_unlock(&GlobalSMBSeslock);
1348                                         /* Found exact match on both TCP and
1349                                            SMB sessions */
1350                                         return ses;
1351                                 }
1352                         }
1353                 }
1354                 /* else tcp and smb sessions need reconnection */
1355         }
1356         read_unlock(&GlobalSMBSeslock);
1357         return NULL;
1358 }
1359
1360 static struct cifsTconInfo *
1361 find_unc(__be32 new_target_ip_addr, char *uncName, char *userName)
1362 {
1363         struct list_head *tmp;
1364         struct cifsTconInfo *tcon;
1365
1366         read_lock(&GlobalSMBSeslock);
1367         list_for_each(tmp, &GlobalTreeConnectionList) {
1368                 cFYI(1, ("Next tcon"));
1369                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
1370                 if (tcon->ses) {
1371                         if (tcon->ses->server) {
1372                                 cFYI(1,
1373                                      ("old ip addr: %x == new ip %x ?",
1374                                       tcon->ses->server->addr.sockAddr.sin_addr.
1375                                       s_addr, new_target_ip_addr));
1376                                 if (tcon->ses->server->addr.sockAddr.sin_addr.
1377                                     s_addr == new_target_ip_addr) {
1378         /* BB lock tcon, server and tcp session and increment use count here? */
1379                                         /* found a match on the TCP session */
1380                                         /* BB check if reconnection needed */
1381                                         cFYI(1,
1382                                               ("IP match, old UNC: %s new: %s",
1383                                               tcon->treeName, uncName));
1384                                         if (strncmp
1385                                             (tcon->treeName, uncName,
1386                                              MAX_TREE_SIZE) == 0) {
1387                                                 cFYI(1,
1388                                                      ("and old usr: %s new: %s",
1389                                                       tcon->treeName, uncName));
1390                                                 if (strncmp
1391                                                     (tcon->ses->userName,
1392                                                      userName,
1393                                                      MAX_USERNAME_SIZE) == 0) {
1394                                                         read_unlock(&GlobalSMBSeslock);
1395                                                         /* matched smb session
1396                                                         (user name */
1397                                                         return tcon;
1398                                                 }
1399                                         }
1400                                 }
1401                         }
1402                 }
1403         }
1404         read_unlock(&GlobalSMBSeslock);
1405         return NULL;
1406 }
1407
1408 int
1409 connect_to_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1410                     const char *old_path, const struct nls_table *nls_codepage,
1411                     int remap)
1412 {
1413         struct dfs_info3_param *referrals = NULL;
1414         unsigned int num_referrals;
1415         int rc = 0;
1416
1417         rc = get_dfs_path(xid, pSesInfo, old_path, nls_codepage,
1418                         &num_referrals, &referrals, remap);
1419
1420         /* BB Add in code to: if valid refrl, if not ip address contact
1421                 the helper that resolves tcp names, mount to it, try to
1422                 tcon to it unmount it if fail */
1423
1424         kfree(referrals);
1425
1426         return rc;
1427 }
1428
1429 int
1430 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
1431              const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
1432              struct dfs_info3_param **preferrals, int remap)
1433 {
1434         char *temp_unc;
1435         int rc = 0;
1436         unsigned char *targetUNCs;
1437
1438         *pnum_referrals = 0;
1439         *preferrals = NULL;
1440
1441         if (pSesInfo->ipc_tid == 0) {
1442                 temp_unc = kmalloc(2 /* for slashes */ +
1443                         strnlen(pSesInfo->serverName,
1444                                 SERVER_NAME_LEN_WITH_NULL * 2)
1445                                  + 1 + 4 /* slash IPC$ */  + 2,
1446                                 GFP_KERNEL);
1447                 if (temp_unc == NULL)
1448                         return -ENOMEM;
1449                 temp_unc[0] = '\\';
1450                 temp_unc[1] = '\\';
1451                 strcpy(temp_unc + 2, pSesInfo->serverName);
1452                 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1453                 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1454                 cFYI(1,
1455                      ("CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid));
1456                 kfree(temp_unc);
1457         }
1458         if (rc == 0)
1459                 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, &targetUNCs,
1460                                      pnum_referrals, nls_codepage, remap);
1461         /* BB map targetUNCs to dfs_info3 structures, here or
1462                 in CIFSGetDFSRefer BB */
1463
1464         return rc;
1465 }
1466
1467 /* See RFC1001 section 14 on representation of Netbios names */
1468 static void rfc1002mangle(char *target, char *source, unsigned int length)
1469 {
1470         unsigned int i, j;
1471
1472         for (i = 0, j = 0; i < (length); i++) {
1473                 /* mask a nibble at a time and encode */
1474                 target[j] = 'A' + (0x0F & (source[i] >> 4));
1475                 target[j+1] = 'A' + (0x0F & source[i]);
1476                 j += 2;
1477         }
1478
1479 }
1480
1481
1482 static int
1483 ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
1484              char *netbios_name, char *target_name)
1485 {
1486         int rc = 0;
1487         int connected = 0;
1488         __be16 orig_port = 0;
1489
1490         if (*csocket == NULL) {
1491                 rc = sock_create_kern(PF_INET, SOCK_STREAM,
1492                                       IPPROTO_TCP, csocket);
1493                 if (rc < 0) {
1494                         cERROR(1, ("Error %d creating socket", rc));
1495                         *csocket = NULL;
1496                         return rc;
1497                 } else {
1498                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1499                         cFYI(1, ("Socket created"));
1500                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1501                 }
1502         }
1503
1504         psin_server->sin_family = AF_INET;
1505         if (psin_server->sin_port) { /* user overrode default port */
1506                 rc = (*csocket)->ops->connect(*csocket,
1507                                 (struct sockaddr *) psin_server,
1508                                 sizeof(struct sockaddr_in), 0);
1509                 if (rc >= 0)
1510                         connected = 1;
1511         }
1512
1513         if (!connected) {
1514                 /* save original port so we can retry user specified port
1515                         later if fall back ports fail this time  */
1516                 orig_port = psin_server->sin_port;
1517
1518                 /* do not retry on the same port we just failed on */
1519                 if (psin_server->sin_port != htons(CIFS_PORT)) {
1520                         psin_server->sin_port = htons(CIFS_PORT);
1521
1522                         rc = (*csocket)->ops->connect(*csocket,
1523                                         (struct sockaddr *) psin_server,
1524                                         sizeof(struct sockaddr_in), 0);
1525                         if (rc >= 0)
1526                                 connected = 1;
1527                 }
1528         }
1529         if (!connected) {
1530                 psin_server->sin_port = htons(RFC1001_PORT);
1531                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1532                                               psin_server,
1533                                               sizeof(struct sockaddr_in), 0);
1534                 if (rc >= 0)
1535                         connected = 1;
1536         }
1537
1538         /* give up here - unless we want to retry on different
1539                 protocol families some day */
1540         if (!connected) {
1541                 if (orig_port)
1542                         psin_server->sin_port = orig_port;
1543                 cFYI(1, ("Error %d connecting to server via ipv4", rc));
1544                 sock_release(*csocket);
1545                 *csocket = NULL;
1546                 return rc;
1547         }
1548         /* Eventually check for other socket options to change from
1549                 the default. sock_setsockopt not used because it expects
1550                 user space buffer */
1551          cFYI(1, ("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
1552                  (*csocket)->sk->sk_sndbuf,
1553                  (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
1554         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1555         /* make the bufsizes depend on wsize/rsize and max requests */
1556         if ((*csocket)->sk->sk_sndbuf < (200 * 1024))
1557                 (*csocket)->sk->sk_sndbuf = 200 * 1024;
1558         if ((*csocket)->sk->sk_rcvbuf < (140 * 1024))
1559                 (*csocket)->sk->sk_rcvbuf = 140 * 1024;
1560
1561         /* send RFC1001 sessinit */
1562         if (psin_server->sin_port == htons(RFC1001_PORT)) {
1563                 /* some servers require RFC1001 sessinit before sending
1564                 negprot - BB check reconnection in case where second
1565                 sessinit is sent but no second negprot */
1566                 struct rfc1002_session_packet *ses_init_buf;
1567                 struct smb_hdr *smb_buf;
1568                 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
1569                                        GFP_KERNEL);
1570                 if (ses_init_buf) {
1571                         ses_init_buf->trailer.session_req.called_len = 32;
1572                         if (target_name && (target_name[0] != 0)) {
1573                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1574                                         target_name, 16);
1575                         } else {
1576                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1577                                         DEFAULT_CIFS_CALLED_NAME, 16);
1578                         }
1579
1580                         ses_init_buf->trailer.session_req.calling_len = 32;
1581                         /* calling name ends in null (byte 16) from old smb
1582                         convention. */
1583                         if (netbios_name && (netbios_name[0] != 0)) {
1584                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1585                                         netbios_name, 16);
1586                         } else {
1587                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1588                                         "LINUX_CIFS_CLNT", 16);
1589                         }
1590                         ses_init_buf->trailer.session_req.scope1 = 0;
1591                         ses_init_buf->trailer.session_req.scope2 = 0;
1592                         smb_buf = (struct smb_hdr *)ses_init_buf;
1593                         /* sizeof RFC1002_SESSION_REQUEST with no scope */
1594                         smb_buf->smb_buf_length = 0x81000044;
1595                         rc = smb_send(*csocket, smb_buf, 0x44,
1596                                 (struct sockaddr *)psin_server);
1597                         kfree(ses_init_buf);
1598                         msleep(1); /* RFC1001 layer in at least one server
1599                                       requires very short break before negprot
1600                                       presumably because not expecting negprot
1601                                       to follow so fast.  This is a simple
1602                                       solution that works without
1603                                       complicating the code and causes no
1604                                       significant slowing down on mount
1605                                       for everyone else */
1606                 }
1607                 /* else the negprot may still work without this
1608                 even though malloc failed */
1609
1610         }
1611
1612         return rc;
1613 }
1614
1615 static int
1616 ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
1617 {
1618         int rc = 0;
1619         int connected = 0;
1620         __be16 orig_port = 0;
1621
1622         if (*csocket == NULL) {
1623                 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
1624                                       IPPROTO_TCP, csocket);
1625                 if (rc < 0) {
1626                         cERROR(1, ("Error %d creating ipv6 socket", rc));
1627                         *csocket = NULL;
1628                         return rc;
1629                 } else {
1630                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1631                          cFYI(1, ("ipv6 Socket created"));
1632                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1633                 }
1634         }
1635
1636         psin_server->sin6_family = AF_INET6;
1637
1638         if (psin_server->sin6_port) { /* user overrode default port */
1639                 rc = (*csocket)->ops->connect(*csocket,
1640                                 (struct sockaddr *) psin_server,
1641                                 sizeof(struct sockaddr_in6), 0);
1642                 if (rc >= 0)
1643                         connected = 1;
1644         }
1645
1646         if (!connected) {
1647                 /* save original port so we can retry user specified port
1648                         later if fall back ports fail this time  */
1649
1650                 orig_port = psin_server->sin6_port;
1651                 /* do not retry on the same port we just failed on */
1652                 if (psin_server->sin6_port != htons(CIFS_PORT)) {
1653                         psin_server->sin6_port = htons(CIFS_PORT);
1654
1655                         rc = (*csocket)->ops->connect(*csocket,
1656                                         (struct sockaddr *) psin_server,
1657                                         sizeof(struct sockaddr_in6), 0);
1658                         if (rc >= 0)
1659                                 connected = 1;
1660                 }
1661         }
1662         if (!connected) {
1663                 psin_server->sin6_port = htons(RFC1001_PORT);
1664                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1665                                  psin_server, sizeof(struct sockaddr_in6), 0);
1666                 if (rc >= 0)
1667                         connected = 1;
1668         }
1669
1670         /* give up here - unless we want to retry on different
1671                 protocol families some day */
1672         if (!connected) {
1673                 if (orig_port)
1674                         psin_server->sin6_port = orig_port;
1675                 cFYI(1, ("Error %d connecting to server via ipv6", rc));
1676                 sock_release(*csocket);
1677                 *csocket = NULL;
1678                 return rc;
1679         }
1680         /* Eventually check for other socket options to change from
1681                 the default. sock_setsockopt not used because it expects
1682                 user space buffer */
1683         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1684
1685         return rc;
1686 }
1687
1688 void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
1689                           struct super_block *sb, struct smb_vol *vol_info)
1690 {
1691         /* if we are reconnecting then should we check to see if
1692          * any requested capabilities changed locally e.g. via
1693          * remount but we can not do much about it here
1694          * if they have (even if we could detect it by the following)
1695          * Perhaps we could add a backpointer to array of sb from tcon
1696          * or if we change to make all sb to same share the same
1697          * sb as NFS - then we only have one backpointer to sb.
1698          * What if we wanted to mount the server share twice once with
1699          * and once without posixacls or posix paths? */
1700         __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1701
1702         if (vol_info && vol_info->no_linux_ext) {
1703                 tcon->fsUnixInfo.Capability = 0;
1704                 tcon->unix_ext = 0; /* Unix Extensions disabled */
1705                 cFYI(1, ("Linux protocol extensions disabled"));
1706                 return;
1707         } else if (vol_info)
1708                 tcon->unix_ext = 1; /* Unix Extensions supported */
1709
1710         if (tcon->unix_ext == 0) {
1711                 cFYI(1, ("Unix extensions disabled so not set on reconnect"));
1712                 return;
1713         }
1714
1715         if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
1716                 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1717
1718                 /* check for reconnect case in which we do not
1719                    want to change the mount behavior if we can avoid it */
1720                 if (vol_info == NULL) {
1721                         /* turn off POSIX ACL and PATHNAMES if not set
1722                            originally at mount time */
1723                         if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
1724                                 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1725                         if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0)
1726                                 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1727                 }
1728
1729                 cap &= CIFS_UNIX_CAP_MASK;
1730                 if (vol_info && vol_info->no_psx_acl)
1731                         cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1732                 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
1733                         cFYI(1, ("negotiated posix acl support"));
1734                         if (sb)
1735                                 sb->s_flags |= MS_POSIXACL;
1736                 }
1737
1738                 if (vol_info && vol_info->posix_paths == 0)
1739                         cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1740                 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
1741                         cFYI(1, ("negotiate posix pathnames"));
1742                         if (sb)
1743                                 CIFS_SB(sb)->mnt_cifs_flags |=
1744                                         CIFS_MOUNT_POSIX_PATHS;
1745                 }
1746
1747                 /* We might be setting the path sep back to a different
1748                 form if we are reconnecting and the server switched its
1749                 posix path capability for this share */
1750                 if (sb && (CIFS_SB(sb)->prepathlen > 0))
1751                         CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
1752
1753                 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
1754                         if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
1755                                 CIFS_SB(sb)->rsize = 127 * 1024;
1756                                 cFYI(DBG2,
1757                                         ("larger reads not supported by srv"));
1758                         }
1759                 }
1760
1761
1762                 cFYI(1, ("Negotiate caps 0x%x", (int)cap));
1763 #ifdef CONFIG_CIFS_DEBUG2
1764                 if (cap & CIFS_UNIX_FCNTL_CAP)
1765                         cFYI(1, ("FCNTL cap"));
1766                 if (cap & CIFS_UNIX_EXTATTR_CAP)
1767                         cFYI(1, ("EXTATTR cap"));
1768                 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
1769                         cFYI(1, ("POSIX path cap"));
1770                 if (cap & CIFS_UNIX_XATTR_CAP)
1771                         cFYI(1, ("XATTR cap"));
1772                 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
1773                         cFYI(1, ("POSIX ACL cap"));
1774                 if (cap & CIFS_UNIX_LARGE_READ_CAP)
1775                         cFYI(1, ("very large read cap"));
1776                 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
1777                         cFYI(1, ("very large write cap"));
1778 #endif /* CIFS_DEBUG2 */
1779                 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
1780                         if (vol_info == NULL) {
1781                                 cFYI(1, ("resetting capabilities failed"));
1782                         } else
1783                                 cERROR(1, ("Negotiating Unix capabilities "
1784                                            "with the server failed.  Consider "
1785                                            "mounting with the Unix Extensions\n"
1786                                            "disabled, if problems are found, "
1787                                            "by specifying the nounix mount "
1788                                            "option."));
1789
1790                 }
1791         }
1792 }
1793
1794 int
1795 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
1796            char *mount_data, const char *devname)
1797 {
1798         int rc = 0;
1799         int xid;
1800         int address_type = AF_INET;
1801         struct socket *csocket = NULL;
1802         struct sockaddr_in sin_server;
1803         struct sockaddr_in6 sin_server6;
1804         struct smb_vol volume_info;
1805         struct cifsSesInfo *pSesInfo = NULL;
1806         struct cifsSesInfo *existingCifsSes = NULL;
1807         struct cifsTconInfo *tcon = NULL;
1808         struct TCP_Server_Info *srvTcp = NULL;
1809
1810         xid = GetXid();
1811
1812 /* cFYI(1, ("Entering cifs_mount. Xid: %d with: %s", xid, mount_data)); */
1813
1814         memset(&volume_info, 0, sizeof(struct smb_vol));
1815         if (cifs_parse_mount_options(mount_data, devname, &volume_info)) {
1816                 rc = -EINVAL;
1817                 goto out;
1818         }
1819
1820         if (volume_info.nullauth) {
1821                 cFYI(1, ("null user"));
1822                 volume_info.username = "";
1823         } else if (volume_info.username) {
1824                 /* BB fixme parse for domain name here */
1825                 cFYI(1, ("Username: %s", volume_info.username));
1826         } else {
1827                 cifserror("No username specified");
1828         /* In userspace mount helper we can get user name from alternate
1829            locations such as env variables and files on disk */
1830                 rc = -EINVAL;
1831                 goto out;
1832         }
1833
1834         if (volume_info.UNCip && volume_info.UNC) {
1835                 rc = cifs_inet_pton(AF_INET, volume_info.UNCip,
1836                                     &sin_server.sin_addr.s_addr);
1837
1838                 if (rc <= 0) {
1839                         /* not ipv4 address, try ipv6 */
1840                         rc = cifs_inet_pton(AF_INET6, volume_info.UNCip,
1841                                             &sin_server6.sin6_addr.in6_u);
1842                         if (rc > 0)
1843                                 address_type = AF_INET6;
1844                 } else {
1845                         address_type = AF_INET;
1846                 }
1847
1848                 if (rc <= 0) {
1849                         /* we failed translating address */
1850                         rc = -EINVAL;
1851                         goto out;
1852                 }
1853
1854                 cFYI(1, ("UNC: %s ip: %s", volume_info.UNC, volume_info.UNCip));
1855                 /* success */
1856                 rc = 0;
1857         } else if (volume_info.UNCip) {
1858                 /* BB using ip addr as server name to connect to the
1859                    DFS root below */
1860                 cERROR(1, ("Connecting to DFS root not implemented yet"));
1861                 rc = -EINVAL;
1862                 goto out;
1863         } else /* which servers DFS root would we conect to */ {
1864                 cERROR(1,
1865                        ("CIFS mount error: No UNC path (e.g. -o "
1866                         "unc=//192.168.1.100/public) specified"));
1867                 rc = -EINVAL;
1868                 goto out;
1869         }
1870
1871         /* this is needed for ASCII cp to Unicode converts */
1872         if (volume_info.iocharset == NULL) {
1873                 cifs_sb->local_nls = load_nls_default();
1874         /* load_nls_default can not return null */
1875         } else {
1876                 cifs_sb->local_nls = load_nls(volume_info.iocharset);
1877                 if (cifs_sb->local_nls == NULL) {
1878                         cERROR(1, ("CIFS mount error: iocharset %s not found",
1879                                  volume_info.iocharset));
1880                         rc = -ELIBACC;
1881                         goto out;
1882                 }
1883         }
1884
1885         if (address_type == AF_INET)
1886                 existingCifsSes = cifs_find_tcp_session(&sin_server.sin_addr,
1887                         NULL /* no ipv6 addr */,
1888                         volume_info.username, &srvTcp);
1889         else if (address_type == AF_INET6) {
1890                 cFYI(1, ("looking for ipv6 address"));
1891                 existingCifsSes = cifs_find_tcp_session(NULL /* no ipv4 addr */,
1892                         &sin_server6.sin6_addr,
1893                         volume_info.username, &srvTcp);
1894         } else {
1895                 rc = -EINVAL;
1896                 goto out;
1897         }
1898
1899         if (srvTcp) {
1900                 cFYI(1, ("Existing tcp session with server found"));
1901         } else {        /* create socket */
1902                 if (volume_info.port)
1903                         sin_server.sin_port = htons(volume_info.port);
1904                 else
1905                         sin_server.sin_port = 0;
1906                 if (address_type == AF_INET6) {
1907                         cFYI(1, ("attempting ipv6 connect"));
1908                         /* BB should we allow ipv6 on port 139? */
1909                         /* other OS never observed in Wild doing 139 with v6 */
1910                         rc = ipv6_connect(&sin_server6, &csocket);
1911                 } else
1912                         rc = ipv4_connect(&sin_server, &csocket,
1913                                   volume_info.source_rfc1001_name,
1914                                   volume_info.target_rfc1001_name);
1915                 if (rc < 0) {
1916                         cERROR(1, ("Error connecting to IPv4 socket. "
1917                                    "Aborting operation"));
1918                         if (csocket != NULL)
1919                                 sock_release(csocket);
1920                         goto out;
1921                 }
1922
1923                 srvTcp = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1924                 if (!srvTcp) {
1925                         rc = -ENOMEM;
1926                         sock_release(csocket);
1927                         goto out;
1928                 } else {
1929                         memcpy(&srvTcp->addr.sockAddr, &sin_server,
1930                                 sizeof(struct sockaddr_in));
1931                         atomic_set(&srvTcp->inFlight, 0);
1932                         /* BB Add code for ipv6 case too */
1933                         srvTcp->ssocket = csocket;
1934                         srvTcp->protocolType = IPV4;
1935                         srvTcp->hostname = extract_hostname(volume_info.UNC);
1936                         if (IS_ERR(srvTcp->hostname)) {
1937                                 rc = PTR_ERR(srvTcp->hostname);
1938                                 sock_release(csocket);
1939                                 goto out;
1940                         }
1941                         init_waitqueue_head(&srvTcp->response_q);
1942                         init_waitqueue_head(&srvTcp->request_q);
1943                         INIT_LIST_HEAD(&srvTcp->pending_mid_q);
1944                         /* at this point we are the only ones with the pointer
1945                         to the struct since the kernel thread not created yet
1946                         so no need to spinlock this init of tcpStatus */
1947                         srvTcp->tcpStatus = CifsNew;
1948                         init_MUTEX(&srvTcp->tcpSem);
1949                         srvTcp->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, srvTcp, "cifsd");
1950                         if (IS_ERR(srvTcp->tsk)) {
1951                                 rc = PTR_ERR(srvTcp->tsk);
1952                                 cERROR(1, ("error %d create cifsd thread", rc));
1953                                 srvTcp->tsk = NULL;
1954                                 sock_release(csocket);
1955                                 kfree(srvTcp->hostname);
1956                                 goto out;
1957                         }
1958                         wait_for_completion(&cifsd_complete);
1959                         rc = 0;
1960                         memcpy(srvTcp->workstation_RFC1001_name,
1961                                 volume_info.source_rfc1001_name, 16);
1962                         memcpy(srvTcp->server_RFC1001_name,
1963                                 volume_info.target_rfc1001_name, 16);
1964                         srvTcp->sequence_number = 0;
1965                 }
1966         }
1967
1968         if (existingCifsSes) {
1969                 pSesInfo = existingCifsSes;
1970                 cFYI(1, ("Existing smb sess found (status=%d)",
1971                         pSesInfo->status));
1972                 down(&pSesInfo->sesSem);
1973                 if (pSesInfo->status == CifsNeedReconnect) {
1974                         cFYI(1, ("Session needs reconnect"));
1975                         rc = cifs_setup_session(xid, pSesInfo,
1976                                                 cifs_sb->local_nls);
1977                 }
1978                 up(&pSesInfo->sesSem);
1979         } else if (!rc) {
1980                 cFYI(1, ("Existing smb sess not found"));
1981                 pSesInfo = sesInfoAlloc();
1982                 if (pSesInfo == NULL)
1983                         rc = -ENOMEM;
1984                 else {
1985                         pSesInfo->server = srvTcp;
1986                         sprintf(pSesInfo->serverName, "%u.%u.%u.%u",
1987                                 NIPQUAD(sin_server.sin_addr.s_addr));
1988                 }
1989
1990                 if (!rc) {
1991                         /* volume_info.password freed at unmount */
1992                         if (volume_info.password) {
1993                                 pSesInfo->password = volume_info.password;
1994                                 /* set to NULL to prevent freeing on exit */
1995                                 volume_info.password = NULL;
1996                         }
1997                         if (volume_info.username)
1998                                 strncpy(pSesInfo->userName,
1999                                         volume_info.username,
2000                                         MAX_USERNAME_SIZE);
2001                         if (volume_info.domainname) {
2002                                 int len = strlen(volume_info.domainname);
2003                                 pSesInfo->domainName =
2004                                         kmalloc(len + 1, GFP_KERNEL);
2005                                 if (pSesInfo->domainName)
2006                                         strcpy(pSesInfo->domainName,
2007                                                 volume_info.domainname);
2008                         }
2009                         pSesInfo->linux_uid = volume_info.linux_uid;
2010                         pSesInfo->overrideSecFlg = volume_info.secFlg;
2011                         down(&pSesInfo->sesSem);
2012                         /* BB FIXME need to pass vol->secFlgs BB */
2013                         rc = cifs_setup_session(xid, pSesInfo,
2014                                                 cifs_sb->local_nls);
2015                         up(&pSesInfo->sesSem);
2016                         if (!rc)
2017                                 atomic_inc(&srvTcp->socketUseCount);
2018                 }
2019         }
2020
2021         /* search for existing tcon to this server share */
2022         if (!rc) {
2023                 if (volume_info.rsize > CIFSMaxBufSize) {
2024                         cERROR(1, ("rsize %d too large, using MaxBufSize",
2025                                 volume_info.rsize));
2026                         cifs_sb->rsize = CIFSMaxBufSize;
2027                 } else if ((volume_info.rsize) &&
2028                                 (volume_info.rsize <= CIFSMaxBufSize))
2029                         cifs_sb->rsize = volume_info.rsize;
2030                 else /* default */
2031                         cifs_sb->rsize = CIFSMaxBufSize;
2032
2033                 if (volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
2034                         cERROR(1, ("wsize %d too large, using 4096 instead",
2035                                   volume_info.wsize));
2036                         cifs_sb->wsize = 4096;
2037                 } else if (volume_info.wsize)
2038                         cifs_sb->wsize = volume_info.wsize;
2039                 else
2040                         cifs_sb->wsize =
2041                                 min_t(const int, PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2042                                         127*1024);
2043                         /* old default of CIFSMaxBufSize was too small now
2044                            that SMB Write2 can send multiple pages in kvec.
2045                            RFC1001 does not describe what happens when frame
2046                            bigger than 128K is sent so use that as max in
2047                            conjunction with 52K kvec constraint on arch with 4K
2048                            page size  */
2049
2050                 if (cifs_sb->rsize < 2048) {
2051                         cifs_sb->rsize = 2048;
2052                         /* Windows ME may prefer this */
2053                         cFYI(1, ("readsize set to minimum: 2048"));
2054                 }
2055                 /* calculate prepath */
2056                 cifs_sb->prepath = volume_info.prepath;
2057                 if (cifs_sb->prepath) {
2058                         cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2059                         cifs_sb->prepath[0] = CIFS_DIR_SEP(cifs_sb);
2060                         volume_info.prepath = NULL;
2061                 } else
2062                         cifs_sb->prepathlen = 0;
2063                 cifs_sb->mnt_uid = volume_info.linux_uid;
2064                 cifs_sb->mnt_gid = volume_info.linux_gid;
2065                 cifs_sb->mnt_file_mode = volume_info.file_mode;
2066                 cifs_sb->mnt_dir_mode = volume_info.dir_mode;
2067                 cFYI(1, ("file mode: 0x%x  dir mode: 0x%x",
2068                         cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode));
2069
2070                 if (volume_info.noperm)
2071                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2072                 if (volume_info.setuids)
2073                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2074                 if (volume_info.server_ino)
2075                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2076                 if (volume_info.remap)
2077                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2078                 if (volume_info.no_xattr)
2079                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2080                 if (volume_info.sfu_emul)
2081                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2082                 if (volume_info.nobrl)
2083                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2084                 if (volume_info.cifs_acl)
2085                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2086                 if (volume_info.override_uid)
2087                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2088                 if (volume_info.override_gid)
2089                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2090                 if (volume_info.direct_io) {
2091                         cFYI(1, ("mounting share using direct i/o"));
2092                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2093                 }
2094
2095                 tcon =
2096                     find_unc(sin_server.sin_addr.s_addr, volume_info.UNC,
2097                              volume_info.username);
2098                 if (tcon) {
2099                         cFYI(1, ("Found match on UNC path"));
2100                         /* we can have only one retry value for a connection
2101                            to a share so for resources mounted more than once
2102                            to the same server share the last value passed in
2103                            for the retry flag is used */
2104                         tcon->retry = volume_info.retry;
2105                         tcon->nocase = volume_info.nocase;
2106                 } else {
2107                         tcon = tconInfoAlloc();
2108                         if (tcon == NULL)
2109                                 rc = -ENOMEM;
2110                         else {
2111                                 /* check for null share name ie connecting to
2112                                  * dfs root */
2113
2114                                 /* BB check if this works for exactly length
2115                                  * three strings */
2116                                 if ((strchr(volume_info.UNC + 3, '\\') == NULL)
2117                                     && (strchr(volume_info.UNC + 3, '/') ==
2118                                         NULL)) {
2119                                         rc = connect_to_dfs_path(xid, pSesInfo,
2120                                                 "", cifs_sb->local_nls,
2121                                                 cifs_sb->mnt_cifs_flags &
2122                                                   CIFS_MOUNT_MAP_SPECIAL_CHR);
2123                                         rc = -ENODEV;
2124                                         goto out;
2125                                 } else {
2126                                         /* BB Do we need to wrap sesSem around
2127                                          * this TCon call and Unix SetFS as
2128                                          * we do on SessSetup and reconnect? */
2129                                         rc = CIFSTCon(xid, pSesInfo,
2130                                                 volume_info.UNC,
2131                                                 tcon, cifs_sb->local_nls);
2132                                         cFYI(1, ("CIFS Tcon rc = %d", rc));
2133                                 }
2134                                 if (!rc) {
2135                                         atomic_inc(&pSesInfo->inUse);
2136                                         tcon->retry = volume_info.retry;
2137                                         tcon->nocase = volume_info.nocase;
2138                                 }
2139                         }
2140                 }
2141         }
2142         if (pSesInfo) {
2143                 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
2144                         sb->s_maxbytes = (u64) 1 << 63;
2145                 } else
2146                         sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
2147         }
2148
2149         /* BB FIXME fix time_gran to be larger for LANMAN sessions */
2150         sb->s_time_gran = 100;
2151
2152 /* on error free sesinfo and tcon struct if needed */
2153         if (rc) {
2154                 /* if session setup failed, use count is zero but
2155                 we still need to free cifsd thread */
2156                 if (atomic_read(&srvTcp->socketUseCount) == 0) {
2157                         spin_lock(&GlobalMid_Lock);
2158                         srvTcp->tcpStatus = CifsExiting;
2159                         spin_unlock(&GlobalMid_Lock);
2160                         if (srvTcp->tsk) {
2161                                 struct task_struct *tsk;
2162                                 /* If we could verify that kthread_stop would
2163                                    always wake up processes blocked in
2164                                    tcp in recv_mesg then we could remove the
2165                                    send_sig call */
2166                                 force_sig(SIGKILL, srvTcp->tsk);
2167                                 tsk = srvTcp->tsk;
2168                                 if (tsk)
2169                                         kthread_stop(tsk);
2170                         }
2171                 }
2172                  /* If find_unc succeeded then rc == 0 so we can not end */
2173                 if (tcon)  /* up accidently freeing someone elses tcon struct */
2174                         tconInfoFree(tcon);
2175                 if (existingCifsSes == NULL) {
2176                         if (pSesInfo) {
2177                                 if ((pSesInfo->server) &&
2178                                     (pSesInfo->status == CifsGood)) {
2179                                         int temp_rc;
2180                                         temp_rc = CIFSSMBLogoff(xid, pSesInfo);
2181                                         /* if the socketUseCount is now zero */
2182                                         if ((temp_rc == -ESHUTDOWN) &&
2183                                             (pSesInfo->server) &&
2184                                             (pSesInfo->server->tsk)) {
2185                                                 struct task_struct *tsk;
2186                                                 force_sig(SIGKILL,
2187                                                         pSesInfo->server->tsk);
2188                                                 tsk = pSesInfo->server->tsk;
2189                                                 if (tsk)
2190                                                         kthread_stop(tsk);
2191                                         }
2192                                 } else {
2193                                         cFYI(1, ("No session or bad tcon"));
2194                                         if ((pSesInfo->server) &&
2195                                             (pSesInfo->server->tsk)) {
2196                                                 struct task_struct *tsk;
2197                                                 force_sig(SIGKILL,
2198                                                         pSesInfo->server->tsk);
2199                                                 tsk = pSesInfo->server->tsk;
2200                                                 if (tsk)
2201                                                         kthread_stop(tsk);
2202                                         }
2203                                 }
2204                                 sesInfoFree(pSesInfo);
2205                                 /* pSesInfo = NULL; */
2206                         }
2207                 }
2208         } else {
2209                 atomic_inc(&tcon->useCount);
2210                 cifs_sb->tcon = tcon;
2211                 tcon->ses = pSesInfo;
2212
2213                 /* do not care if following two calls succeed - informational */
2214                 if (!tcon->ipc) {
2215                         CIFSSMBQFSDeviceInfo(xid, tcon);
2216                         CIFSSMBQFSAttributeInfo(xid, tcon);
2217                 }
2218
2219                 /* tell server which Unix caps we support */
2220                 if (tcon->ses->capabilities & CAP_UNIX)
2221                         /* reset of caps checks mount to see if unix extensions
2222                            disabled for just this mount */
2223                         reset_cifs_unix_caps(xid, tcon, sb, &volume_info);
2224                 else
2225                         tcon->unix_ext = 0; /* server does not support them */
2226
2227                 if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2228                         cifs_sb->rsize = 1024 * 127;
2229                         cFYI(DBG2,
2230                                 ("no very large read support, rsize now 127K"));
2231                 }
2232                 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2233                         cifs_sb->wsize = min(cifs_sb->wsize,
2234                                              (tcon->ses->server->maxBuf -
2235                                               MAX_CIFS_HDR_SIZE));
2236                 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2237                         cifs_sb->rsize = min(cifs_sb->rsize,
2238                                              (tcon->ses->server->maxBuf -
2239                                               MAX_CIFS_HDR_SIZE));
2240         }
2241
2242         /* volume_info.password is freed above when existing session found
2243         (in which case it is not needed anymore) but when new sesion is created
2244         the password ptr is put in the new session structure (in which case the
2245         password will be freed at unmount time) */
2246 out:
2247         /* zero out password before freeing */
2248         if (volume_info.password != NULL) {
2249                 memset(volume_info.password, 0, strlen(volume_info.password));
2250                 kfree(volume_info.password);
2251         }
2252         kfree(volume_info.UNC);
2253         kfree(volume_info.prepath);
2254         FreeXid(xid);
2255         return rc;
2256 }
2257
2258 static int
2259 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2260               char session_key[CIFS_SESS_KEY_SIZE],
2261               const struct nls_table *nls_codepage)
2262 {
2263         struct smb_hdr *smb_buffer;
2264         struct smb_hdr *smb_buffer_response;
2265         SESSION_SETUP_ANDX *pSMB;
2266         SESSION_SETUP_ANDX *pSMBr;
2267         char *bcc_ptr;
2268         char *user;
2269         char *domain;
2270         int rc = 0;
2271         int remaining_words = 0;
2272         int bytes_returned = 0;
2273         int len;
2274         __u32 capabilities;
2275         __u16 count;
2276
2277         cFYI(1, ("In sesssetup"));
2278         if (ses == NULL)
2279                 return -EINVAL;
2280         user = ses->userName;
2281         domain = ses->domainName;
2282         smb_buffer = cifs_buf_get();
2283         if (smb_buffer == NULL) {
2284                 return -ENOMEM;
2285         }
2286         smb_buffer_response = smb_buffer;
2287         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2288
2289         /* send SMBsessionSetup here */
2290         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2291                         NULL /* no tCon exists yet */ , 13 /* wct */ );
2292
2293         smb_buffer->Mid = GetNextMid(ses->server);
2294         pSMB->req_no_secext.AndXCommand = 0xFF;
2295         pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2296         pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2297
2298         if (ses->server->secMode &
2299                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2300                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2301
2302         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2303                 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2304         if (ses->capabilities & CAP_UNICODE) {
2305                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2306                 capabilities |= CAP_UNICODE;
2307         }
2308         if (ses->capabilities & CAP_STATUS32) {
2309                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2310                 capabilities |= CAP_STATUS32;
2311         }
2312         if (ses->capabilities & CAP_DFS) {
2313                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2314                 capabilities |= CAP_DFS;
2315         }
2316         pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2317
2318         pSMB->req_no_secext.CaseInsensitivePasswordLength =
2319                 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2320
2321         pSMB->req_no_secext.CaseSensitivePasswordLength =
2322             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2323         bcc_ptr = pByteArea(smb_buffer);
2324         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2325         bcc_ptr += CIFS_SESS_KEY_SIZE;
2326         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2327         bcc_ptr += CIFS_SESS_KEY_SIZE;
2328
2329         if (ses->capabilities & CAP_UNICODE) {
2330                 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2331                         *bcc_ptr = 0;
2332                         bcc_ptr++;
2333                 }
2334                 if (user == NULL)
2335                         bytes_returned = 0; /* skip null user */
2336                 else
2337                         bytes_returned =
2338                                 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2339                                         nls_codepage);
2340                 /* convert number of 16 bit words to bytes */
2341                 bcc_ptr += 2 * bytes_returned;
2342                 bcc_ptr += 2;   /* trailing null */
2343                 if (domain == NULL)
2344                         bytes_returned =
2345                             cifs_strtoUCS((__le16 *) bcc_ptr,
2346                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2347                 else
2348                         bytes_returned =
2349                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2350                                           nls_codepage);
2351                 bcc_ptr += 2 * bytes_returned;
2352                 bcc_ptr += 2;
2353                 bytes_returned =
2354                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2355                                   32, nls_codepage);
2356                 bcc_ptr += 2 * bytes_returned;
2357                 bytes_returned =
2358                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release,
2359                                   32, nls_codepage);
2360                 bcc_ptr += 2 * bytes_returned;
2361                 bcc_ptr += 2;
2362                 bytes_returned =
2363                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2364                                   64, nls_codepage);
2365                 bcc_ptr += 2 * bytes_returned;
2366                 bcc_ptr += 2;
2367         } else {
2368                 if (user != NULL) {
2369                     strncpy(bcc_ptr, user, 200);
2370                     bcc_ptr += strnlen(user, 200);
2371                 }
2372                 *bcc_ptr = 0;
2373                 bcc_ptr++;
2374                 if (domain == NULL) {
2375                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2376                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2377                 } else {
2378                         strncpy(bcc_ptr, domain, 64);
2379                         bcc_ptr += strnlen(domain, 64);
2380                         *bcc_ptr = 0;
2381                         bcc_ptr++;
2382                 }
2383                 strcpy(bcc_ptr, "Linux version ");
2384                 bcc_ptr += strlen("Linux version ");
2385                 strcpy(bcc_ptr, utsname()->release);
2386                 bcc_ptr += strlen(utsname()->release) + 1;
2387                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2388                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2389         }
2390         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2391         smb_buffer->smb_buf_length += count;
2392         pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2393
2394         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2395                          &bytes_returned, CIFS_LONG_OP);
2396         if (rc) {
2397 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2398         } else if ((smb_buffer_response->WordCount == 3)
2399                    || (smb_buffer_response->WordCount == 4)) {
2400                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2401                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2402                 if (action & GUEST_LOGIN)
2403                         cFYI(1, (" Guest login")); /* BB mark SesInfo struct? */
2404                 ses->Suid = smb_buffer_response->Uid; /* UID left in wire format
2405                                                          (little endian) */
2406                 cFYI(1, ("UID = %d ", ses->Suid));
2407         /* response can have either 3 or 4 word count - Samba sends 3 */
2408                 bcc_ptr = pByteArea(smb_buffer_response);
2409                 if ((pSMBr->resp.hdr.WordCount == 3)
2410                     || ((pSMBr->resp.hdr.WordCount == 4)
2411                         && (blob_len < pSMBr->resp.ByteCount))) {
2412                         if (pSMBr->resp.hdr.WordCount == 4)
2413                                 bcc_ptr += blob_len;
2414
2415                         if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2416                                 if ((long) (bcc_ptr) % 2) {
2417                                         remaining_words =
2418                                             (BCC(smb_buffer_response) - 1) / 2;
2419                                         /* Unicode strings must be word
2420                                            aligned */
2421                                         bcc_ptr++;
2422                                 } else {
2423                                         remaining_words =
2424                                                 BCC(smb_buffer_response) / 2;
2425                                 }
2426                                 len =
2427                                     UniStrnlen((wchar_t *) bcc_ptr,
2428                                                remaining_words - 1);
2429 /* We look for obvious messed up bcc or strings in response so we do not go off
2430    the end since (at least) WIN2K and Windows XP have a major bug in not null
2431    terminating last Unicode string in response  */
2432                                 if (ses->serverOS)
2433                                         kfree(ses->serverOS);
2434                                 ses->serverOS = kzalloc(2 * (len + 1),
2435                                                         GFP_KERNEL);
2436                                 if (ses->serverOS == NULL)
2437                                         goto sesssetup_nomem;
2438                                 cifs_strfromUCS_le(ses->serverOS,
2439                                                    (__le16 *)bcc_ptr,
2440                                                    len, nls_codepage);
2441                                 bcc_ptr += 2 * (len + 1);
2442                                 remaining_words -= len + 1;
2443                                 ses->serverOS[2 * len] = 0;
2444                                 ses->serverOS[1 + (2 * len)] = 0;
2445                                 if (remaining_words > 0) {
2446                                         len = UniStrnlen((wchar_t *)bcc_ptr,
2447                                                          remaining_words-1);
2448                                         kfree(ses->serverNOS);
2449                                         ses->serverNOS = kzalloc(2 * (len + 1),
2450                                                                  GFP_KERNEL);
2451                                         if (ses->serverNOS == NULL)
2452                                                 goto sesssetup_nomem;
2453                                         cifs_strfromUCS_le(ses->serverNOS,
2454                                                            (__le16 *)bcc_ptr,
2455                                                            len, nls_codepage);
2456                                         bcc_ptr += 2 * (len + 1);
2457                                         ses->serverNOS[2 * len] = 0;
2458                                         ses->serverNOS[1 + (2 * len)] = 0;
2459                                         if (strncmp(ses->serverNOS,
2460                                                 "NT LAN Manager 4", 16) == 0) {
2461                                                 cFYI(1, ("NT4 server"));
2462                                                 ses->flags |= CIFS_SES_NT4;
2463                                         }
2464                                         remaining_words -= len + 1;
2465                                         if (remaining_words > 0) {
2466                                                 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2467                                 /* last string is not always null terminated
2468                                    (for e.g. for Windows XP & 2000) */
2469                                                 if (ses->serverDomain)
2470                                                         kfree(ses->serverDomain);
2471                                                 ses->serverDomain =
2472                                                     kzalloc(2*(len+1),
2473                                                             GFP_KERNEL);
2474                                                 if (ses->serverDomain == NULL)
2475                                                         goto sesssetup_nomem;
2476                                                 cifs_strfromUCS_le(ses->serverDomain,
2477                                                         (__le16 *)bcc_ptr,
2478                                                         len, nls_codepage);
2479                                                 bcc_ptr += 2 * (len + 1);
2480                                                 ses->serverDomain[2*len] = 0;
2481                                                 ses->serverDomain[1+(2*len)] = 0;
2482                                         } else { /* else no more room so create
2483                                                   dummy domain string */
2484                                                 if (ses->serverDomain)
2485                                                         kfree(ses->serverDomain);
2486                                                 ses->serverDomain =
2487                                                         kzalloc(2, GFP_KERNEL);
2488                                         }
2489                                 } else { /* no room so create dummy domain
2490                                             and NOS string */
2491
2492                                         /* if these kcallocs fail not much we
2493                                            can do, but better to not fail the
2494                                            sesssetup itself */
2495                                         kfree(ses->serverDomain);
2496                                         ses->serverDomain =
2497                                             kzalloc(2, GFP_KERNEL);
2498                                         kfree(ses->serverNOS);
2499                                         ses->serverNOS =
2500                                             kzalloc(2, GFP_KERNEL);
2501                                 }
2502                         } else {        /* ASCII */
2503                                 len = strnlen(bcc_ptr, 1024);
2504                                 if (((long) bcc_ptr + len) - (long)
2505                                     pByteArea(smb_buffer_response)
2506                                             <= BCC(smb_buffer_response)) {
2507                                         kfree(ses->serverOS);
2508                                         ses->serverOS = kzalloc(len + 1,
2509                                                                 GFP_KERNEL);
2510                                         if (ses->serverOS == NULL)
2511                                                 goto sesssetup_nomem;
2512                                         strncpy(ses->serverOS, bcc_ptr, len);
2513
2514                                         bcc_ptr += len;
2515                                         /* null terminate the string */
2516                                         bcc_ptr[0] = 0;
2517                                         bcc_ptr++;
2518
2519                                         len = strnlen(bcc_ptr, 1024);
2520                                         kfree(ses->serverNOS);
2521                                         ses->serverNOS = kzalloc(len + 1,
2522                                                                  GFP_KERNEL);
2523                                         if (ses->serverNOS == NULL)
2524                                                 goto sesssetup_nomem;
2525                                         strncpy(ses->serverNOS, bcc_ptr, len);
2526                                         bcc_ptr += len;
2527                                         bcc_ptr[0] = 0;
2528                                         bcc_ptr++;
2529
2530                                         len = strnlen(bcc_ptr, 1024);
2531                                         if (ses->serverDomain)
2532                                                 kfree(ses->serverDomain);
2533                                         ses->serverDomain = kzalloc(len + 1,
2534                                                                     GFP_KERNEL);
2535                                         if (ses->serverDomain == NULL)
2536                                                 goto sesssetup_nomem;
2537                                         strncpy(ses->serverDomain, bcc_ptr,
2538                                                 len);
2539                                         bcc_ptr += len;
2540                                         bcc_ptr[0] = 0;
2541                                         bcc_ptr++;
2542                                 } else
2543                                         cFYI(1,
2544                                              ("Variable field of length %d "
2545                                                 "extends beyond end of smb ",
2546                                               len));
2547                         }
2548                 } else {
2549                         cERROR(1,
2550                                (" Security Blob Length extends beyond "
2551                                 "end of SMB"));
2552                 }
2553         } else {
2554                 cERROR(1,
2555                        (" Invalid Word count %d: ",
2556                         smb_buffer_response->WordCount));
2557                 rc = -EIO;
2558         }
2559 sesssetup_nomem:        /* do not return an error on nomem for the info strings,
2560                            since that could make reconnection harder, and
2561                            reconnection might be needed to free memory */
2562         cifs_buf_release(smb_buffer);
2563
2564         return rc;
2565 }
2566
2567 static int
2568 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2569                               struct cifsSesInfo *ses, int *pNTLMv2_flag,
2570                               const struct nls_table *nls_codepage)
2571 {
2572         struct smb_hdr *smb_buffer;
2573         struct smb_hdr *smb_buffer_response;
2574         SESSION_SETUP_ANDX *pSMB;
2575         SESSION_SETUP_ANDX *pSMBr;
2576         char *bcc_ptr;
2577         char *domain;
2578         int rc = 0;
2579         int remaining_words = 0;
2580         int bytes_returned = 0;
2581         int len;
2582         int SecurityBlobLength = sizeof(NEGOTIATE_MESSAGE);
2583         PNEGOTIATE_MESSAGE SecurityBlob;
2584         PCHALLENGE_MESSAGE SecurityBlob2;
2585         __u32 negotiate_flags, capabilities;
2586         __u16 count;
2587
2588         cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
2589         if (ses == NULL)
2590                 return -EINVAL;
2591         domain = ses->domainName;
2592         *pNTLMv2_flag = FALSE;
2593         smb_buffer = cifs_buf_get();
2594         if (smb_buffer == NULL) {
2595                 return -ENOMEM;
2596         }
2597         smb_buffer_response = smb_buffer;
2598         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2599         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2600
2601         /* send SMBsessionSetup here */
2602         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2603                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2604
2605         smb_buffer->Mid = GetNextMid(ses->server);
2606         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2607         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2608
2609         pSMB->req.AndXCommand = 0xFF;
2610         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2611         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2612
2613         if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2614                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2615
2616         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2617             CAP_EXTENDED_SECURITY;
2618         if (ses->capabilities & CAP_UNICODE) {
2619                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2620                 capabilities |= CAP_UNICODE;
2621         }
2622         if (ses->capabilities & CAP_STATUS32) {
2623                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2624                 capabilities |= CAP_STATUS32;
2625         }
2626         if (ses->capabilities & CAP_DFS) {
2627                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2628                 capabilities |= CAP_DFS;
2629         }
2630         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2631
2632         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2633         SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2634         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2635         SecurityBlob->MessageType = NtLmNegotiate;
2636         negotiate_flags =
2637             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2638             NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
2639             NTLMSSP_NEGOTIATE_56 |
2640             /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2641         if (sign_CIFS_PDUs)
2642                 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2643 /*      if (ntlmv2_support)
2644                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;*/
2645         /* setup pointers to domain name and workstation name */
2646         bcc_ptr += SecurityBlobLength;
2647
2648         SecurityBlob->WorkstationName.Buffer = 0;
2649         SecurityBlob->WorkstationName.Length = 0;
2650         SecurityBlob->WorkstationName.MaximumLength = 0;
2651
2652         /* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
2653         along with username on auth request (ie the response to challenge) */
2654         SecurityBlob->DomainName.Buffer = 0;
2655         SecurityBlob->DomainName.Length = 0;
2656         SecurityBlob->DomainName.MaximumLength = 0;
2657         if (ses->capabilities & CAP_UNICODE) {
2658                 if ((long) bcc_ptr % 2) {
2659                         *bcc_ptr = 0;
2660                         bcc_ptr++;
2661                 }
2662
2663                 bytes_returned =
2664                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2665                                   32, nls_codepage);
2666                 bcc_ptr += 2 * bytes_returned;
2667                 bytes_returned =
2668                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
2669                                   nls_codepage);
2670                 bcc_ptr += 2 * bytes_returned;
2671                 bcc_ptr += 2;   /* null terminate Linux version */
2672                 bytes_returned =
2673                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2674                                   64, nls_codepage);
2675                 bcc_ptr += 2 * bytes_returned;
2676                 *(bcc_ptr + 1) = 0;
2677                 *(bcc_ptr + 2) = 0;
2678                 bcc_ptr += 2;   /* null terminate network opsys string */
2679                 *(bcc_ptr + 1) = 0;
2680                 *(bcc_ptr + 2) = 0;
2681                 bcc_ptr += 2;   /* null domain */
2682         } else {                /* ASCII */
2683                 strcpy(bcc_ptr, "Linux version ");
2684                 bcc_ptr += strlen("Linux version ");
2685                 strcpy(bcc_ptr, utsname()->release);
2686                 bcc_ptr += strlen(utsname()->release) + 1;
2687                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2688                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2689                 bcc_ptr++;      /* empty domain field */
2690                 *bcc_ptr = 0;
2691         }
2692         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2693         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2694         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2695         smb_buffer->smb_buf_length += count;
2696         pSMB->req.ByteCount = cpu_to_le16(count);
2697
2698         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2699                          &bytes_returned, CIFS_LONG_OP);
2700
2701         if (smb_buffer_response->Status.CifsError ==
2702             cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
2703                 rc = 0;
2704
2705         if (rc) {
2706 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2707         } else if ((smb_buffer_response->WordCount == 3)
2708                    || (smb_buffer_response->WordCount == 4)) {
2709                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2710                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2711
2712                 if (action & GUEST_LOGIN)
2713                         cFYI(1, (" Guest login"));
2714         /* Do we want to set anything in SesInfo struct when guest login? */
2715
2716                 bcc_ptr = pByteArea(smb_buffer_response);
2717         /* response can have either 3 or 4 word count - Samba sends 3 */
2718
2719                 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
2720                 if (SecurityBlob2->MessageType != NtLmChallenge) {
2721                         cFYI(1,
2722                              ("Unexpected NTLMSSP message type received %d",
2723                               SecurityBlob2->MessageType));
2724                 } else if (ses) {
2725                         ses->Suid = smb_buffer_response->Uid; /* UID left in le format */
2726                         cFYI(1, ("UID = %d", ses->Suid));
2727                         if ((pSMBr->resp.hdr.WordCount == 3)
2728                             || ((pSMBr->resp.hdr.WordCount == 4)
2729                                 && (blob_len <
2730                                     pSMBr->resp.ByteCount))) {
2731
2732                                 if (pSMBr->resp.hdr.WordCount == 4) {
2733                                         bcc_ptr += blob_len;
2734                                         cFYI(1, ("Security Blob Length %d",
2735                                               blob_len));
2736                                 }
2737
2738                                 cFYI(1, ("NTLMSSP Challenge rcvd"));
2739
2740                                 memcpy(ses->server->cryptKey,
2741                                        SecurityBlob2->Challenge,
2742                                        CIFS_CRYPTO_KEY_SIZE);
2743                                 if (SecurityBlob2->NegotiateFlags &
2744                                         cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
2745                                         *pNTLMv2_flag = TRUE;
2746
2747                                 if ((SecurityBlob2->NegotiateFlags &
2748                                         cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN))
2749                                         || (sign_CIFS_PDUs > 1))
2750                                                 ses->server->secMode |=
2751                                                         SECMODE_SIGN_REQUIRED;
2752                                 if ((SecurityBlob2->NegotiateFlags &
2753                                         cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
2754                                                 ses->server->secMode |=
2755                                                         SECMODE_SIGN_ENABLED;
2756
2757                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2758                                         if ((long) (bcc_ptr) % 2) {
2759                                                 remaining_words =
2760                                                     (BCC(smb_buffer_response)
2761                                                      - 1) / 2;
2762                                          /* Must word align unicode strings */
2763                                                 bcc_ptr++;
2764                                         } else {
2765                                                 remaining_words =
2766                                                     BCC
2767                                                     (smb_buffer_response) / 2;
2768                                         }
2769                                         len =
2770                                             UniStrnlen((wchar_t *) bcc_ptr,
2771                                                        remaining_words - 1);
2772 /* We look for obvious messed up bcc or strings in response so we do not go off
2773    the end since (at least) WIN2K and Windows XP have a major bug in not null
2774    terminating last Unicode string in response  */
2775                                         if (ses->serverOS)
2776                                                 kfree(ses->serverOS);
2777                                         ses->serverOS =
2778                                             kzalloc(2 * (len + 1), GFP_KERNEL);
2779                                         cifs_strfromUCS_le(ses->serverOS,
2780                                                            (__le16 *)
2781                                                            bcc_ptr, len,
2782                                                            nls_codepage);
2783                                         bcc_ptr += 2 * (len + 1);
2784                                         remaining_words -= len + 1;
2785                                         ses->serverOS[2 * len] = 0;
2786                                         ses->serverOS[1 + (2 * len)] = 0;
2787                                         if (remaining_words > 0) {
2788                                                 len = UniStrnlen((wchar_t *)
2789                                                                  bcc_ptr,
2790                                                                  remaining_words
2791                                                                  - 1);
2792                                                 kfree(ses->serverNOS);
2793                                                 ses->serverNOS =
2794                                                     kzalloc(2 * (len + 1),
2795                                                             GFP_KERNEL);
2796                                                 cifs_strfromUCS_le(ses->
2797                                                                    serverNOS,
2798                                                                    (__le16 *)
2799                                                                    bcc_ptr,
2800                                                                    len,
2801                                                                    nls_codepage);
2802                                                 bcc_ptr += 2 * (len + 1);
2803                                                 ses->serverNOS[2 * len] = 0;
2804                                                 ses->serverNOS[1 +
2805                                                                (2 * len)] = 0;
2806                                                 remaining_words -= len + 1;
2807                                                 if (remaining_words > 0) {
2808                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2809                                 /* last string not always null terminated
2810                                    (for e.g. for Windows XP & 2000) */
2811                                                         kfree(ses->serverDomain);
2812                                                         ses->serverDomain =
2813                                                             kzalloc(2 *
2814                                                                     (len +
2815                                                                      1),
2816                                                                     GFP_KERNEL);
2817                                                         cifs_strfromUCS_le
2818                                                             (ses->serverDomain,
2819                                                              (__le16 *)bcc_ptr,
2820                                                              len, nls_codepage);
2821                                                         bcc_ptr +=
2822                                                             2 * (len + 1);
2823                                                         ses->serverDomain[2*len]
2824                                                             = 0;
2825                                                         ses->serverDomain
2826                                                                 [1 + (2 * len)]
2827                                                             = 0;
2828                                                 } /* else no more room so create dummy domain string */
2829                                                 else {
2830                                                         kfree(ses->serverDomain);
2831                                                         ses->serverDomain =
2832                                                             kzalloc(2,
2833                                                                     GFP_KERNEL);
2834                                                 }
2835                                         } else {        /* no room so create dummy domain and NOS string */
2836                                                 kfree(ses->serverDomain);
2837                                                 ses->serverDomain =
2838                                                     kzalloc(2, GFP_KERNEL);
2839                                                 kfree(ses->serverNOS);
2840                                                 ses->serverNOS =
2841                                                     kzalloc(2, GFP_KERNEL);
2842                                         }
2843                                 } else {        /* ASCII */
2844                                         len = strnlen(bcc_ptr, 1024);
2845                                         if (((long) bcc_ptr + len) - (long)
2846                                             pByteArea(smb_buffer_response)
2847                                             <= BCC(smb_buffer_response)) {
2848                                                 if (ses->serverOS)
2849                                                         kfree(ses->serverOS);
2850                                                 ses->serverOS =
2851                                                     kzalloc(len + 1,
2852                                                             GFP_KERNEL);
2853                                                 strncpy(ses->serverOS,
2854                                                         bcc_ptr, len);
2855
2856                                                 bcc_ptr += len;
2857                                                 bcc_ptr[0] = 0; /* null terminate string */
2858                                                 bcc_ptr++;
2859
2860                                                 len = strnlen(bcc_ptr, 1024);
2861                                                 kfree(ses->serverNOS);
2862                                                 ses->serverNOS =
2863                                                     kzalloc(len + 1,
2864                                                             GFP_KERNEL);
2865                                                 strncpy(ses->serverNOS, bcc_ptr, len);
2866                                                 bcc_ptr += len;
2867                                                 bcc_ptr[0] = 0;
2868                                                 bcc_ptr++;
2869
2870                                                 len = strnlen(bcc_ptr, 1024);
2871                                                 kfree(ses->serverDomain);
2872                                                 ses->serverDomain =
2873                                                     kzalloc(len + 1,
2874                                                             GFP_KERNEL);
2875                                                 strncpy(ses->serverDomain,
2876                                                         bcc_ptr, len);
2877                                                 bcc_ptr += len;
2878                                                 bcc_ptr[0] = 0;
2879                                                 bcc_ptr++;
2880                                         } else
2881                                                 cFYI(1,
2882                                                      ("field of length %d "
2883                                                     "extends beyond end of smb",
2884                                                       len));
2885                                 }
2886                         } else {
2887                                 cERROR(1, ("Security Blob Length extends beyond"
2888                                            " end of SMB"));
2889                         }
2890                 } else {
2891                         cERROR(1, ("No session structure passed in."));
2892                 }
2893         } else {
2894                 cERROR(1,
2895                        (" Invalid Word count %d:",
2896                         smb_buffer_response->WordCount));
2897                 rc = -EIO;
2898         }
2899
2900         cifs_buf_release(smb_buffer);
2901
2902         return rc;
2903 }
2904 static int
2905 CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2906                         char *ntlm_session_key, int ntlmv2_flag,
2907                         const struct nls_table *nls_codepage)
2908 {
2909         struct smb_hdr *smb_buffer;
2910         struct smb_hdr *smb_buffer_response;
2911         SESSION_SETUP_ANDX *pSMB;
2912         SESSION_SETUP_ANDX *pSMBr;
2913         char *bcc_ptr;
2914         char *user;
2915         char *domain;
2916         int rc = 0;
2917         int remaining_words = 0;
2918         int bytes_returned = 0;
2919         int len;
2920         int SecurityBlobLength = sizeof(AUTHENTICATE_MESSAGE);
2921         PAUTHENTICATE_MESSAGE SecurityBlob;
2922         __u32 negotiate_flags, capabilities;
2923         __u16 count;
2924
2925         cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
2926         if (ses == NULL)
2927                 return -EINVAL;
2928         user = ses->userName;
2929         domain = ses->domainName;
2930         smb_buffer = cifs_buf_get();
2931         if (smb_buffer == NULL) {
2932                 return -ENOMEM;
2933         }
2934         smb_buffer_response = smb_buffer;
2935         pSMB = (SESSION_SETUP_ANDX *)smb_buffer;
2936         pSMBr = (SESSION_SETUP_ANDX *)smb_buffer_response;
2937
2938         /* send SMBsessionSetup here */
2939         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2940                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2941
2942         smb_buffer->Mid = GetNextMid(ses->server);
2943         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2944         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2945         pSMB->req.AndXCommand = 0xFF;
2946         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2947         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2948
2949         pSMB->req.hdr.Uid = ses->Suid;
2950
2951         if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2952                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2953
2954         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2955                         CAP_EXTENDED_SECURITY;
2956         if (ses->capabilities & CAP_UNICODE) {
2957                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2958                 capabilities |= CAP_UNICODE;
2959         }
2960         if (ses->capabilities & CAP_STATUS32) {
2961                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2962                 capabilities |= CAP_STATUS32;
2963         }
2964         if (ses->capabilities & CAP_DFS) {
2965                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2966                 capabilities |= CAP_DFS;
2967         }
2968         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2969
2970         bcc_ptr = (char *)&pSMB->req.SecurityBlob;
2971         SecurityBlob = (PAUTHENTICATE_MESSAGE)bcc_ptr;
2972         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2973         SecurityBlob->MessageType = NtLmAuthenticate;
2974         bcc_ptr += SecurityBlobLength;
2975         negotiate_flags = NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
2976                         NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
2977                         0x80000000 | NTLMSSP_NEGOTIATE_128;
2978         if (sign_CIFS_PDUs)
2979                 negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
2980         if (ntlmv2_flag)
2981                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
2982
2983 /* setup pointers to domain name and workstation name */
2984
2985         SecurityBlob->WorkstationName.Buffer = 0;
2986         SecurityBlob->WorkstationName.Length = 0;
2987         SecurityBlob->WorkstationName.MaximumLength = 0;
2988         SecurityBlob->SessionKey.Length = 0;
2989         SecurityBlob->SessionKey.MaximumLength = 0;
2990         SecurityBlob->SessionKey.Buffer = 0;
2991
2992         SecurityBlob->LmChallengeResponse.Length = 0;
2993         SecurityBlob->LmChallengeResponse.MaximumLength = 0;
2994         SecurityBlob->LmChallengeResponse.Buffer = 0;
2995
2996         SecurityBlob->NtChallengeResponse.Length =
2997             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2998         SecurityBlob->NtChallengeResponse.MaximumLength =
2999             cpu_to_le16(CIFS_SESS_KEY_SIZE);
3000         memcpy(bcc_ptr, ntlm_session_key, CIFS_SESS_KEY_SIZE);
3001         SecurityBlob->NtChallengeResponse.Buffer =
3002             cpu_to_le32(SecurityBlobLength);
3003         SecurityBlobLength += CIFS_SESS_KEY_SIZE;
3004         bcc_ptr += CIFS_SESS_KEY_SIZE;
3005
3006         if (ses->capabilities & CAP_UNICODE) {
3007                 if (domain == NULL) {
3008                         SecurityBlob->DomainName.Buffer = 0;
3009                         SecurityBlob->DomainName.Length = 0;
3010                         SecurityBlob->DomainName.MaximumLength = 0;
3011                 } else {
3012                         __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
3013                                           nls_codepage);
3014                         ln *= 2;
3015                         SecurityBlob->DomainName.MaximumLength =
3016                             cpu_to_le16(ln);
3017                         SecurityBlob->DomainName.Buffer =
3018                             cpu_to_le32(SecurityBlobLength);
3019                         bcc_ptr += ln;
3020                         SecurityBlobLength += ln;
3021                         SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3022                 }
3023                 if (user == NULL) {
3024                         SecurityBlob->UserName.Buffer = 0;
3025                         SecurityBlob->UserName.Length = 0;
3026                         SecurityBlob->UserName.MaximumLength = 0;
3027                 } else {
3028                         __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
3029                                           nls_codepage);
3030                         ln *= 2;
3031                         SecurityBlob->UserName.MaximumLength =
3032                             cpu_to_le16(ln);
3033                         SecurityBlob->UserName.Buffer =
3034                             cpu_to_le32(SecurityBlobLength);
3035                         bcc_ptr += ln;
3036                         SecurityBlobLength += ln;
3037                         SecurityBlob->UserName.Length = cpu_to_le16(ln);
3038                 }
3039
3040                 /* SecurityBlob->WorkstationName.Length =
3041                  cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
3042                    SecurityBlob->WorkstationName.Length *= 2;
3043                    SecurityBlob->WorkstationName.MaximumLength =
3044                         cpu_to_le16(SecurityBlob->WorkstationName.Length);
3045                    SecurityBlob->WorkstationName.Buffer =
3046                                  cpu_to_le32(SecurityBlobLength);
3047                    bcc_ptr += SecurityBlob->WorkstationName.Length;
3048                    SecurityBlobLength += SecurityBlob->WorkstationName.Length;
3049                    SecurityBlob->WorkstationName.Length =
3050                         cpu_to_le16(SecurityBlob->WorkstationName.Length);  */
3051
3052                 if ((long) bcc_ptr % 2) {
3053                         *bcc_ptr = 0;
3054                         bcc_ptr++;
3055                 }
3056                 bytes_returned =
3057                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
3058                                   32, nls_codepage);
3059                 bcc_ptr += 2 * bytes_returned;
3060                 bytes_returned =
3061                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
3062                                   nls_codepage);
3063                 bcc_ptr += 2 * bytes_returned;
3064                 bcc_ptr += 2;   /* null term version string */
3065                 bytes_returned =
3066                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
3067                                   64, nls_codepage);
3068                 bcc_ptr += 2 * bytes_returned;
3069                 *(bcc_ptr + 1) = 0;
3070                 *(bcc_ptr + 2) = 0;
3071                 bcc_ptr += 2;   /* null terminate network opsys string */
3072                 *(bcc_ptr + 1) = 0;
3073                 *(bcc_ptr + 2) = 0;
3074                 bcc_ptr += 2;   /* null domain */
3075         } else {                /* ASCII */
3076                 if (domain == NULL) {
3077                         SecurityBlob->DomainName.Buffer = 0;
3078                         SecurityBlob->DomainName.Length = 0;
3079                         SecurityBlob->DomainName.MaximumLength = 0;
3080                 } else {
3081                         __u16 ln;
3082                         negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
3083                         strncpy(bcc_ptr, domain, 63);
3084                         ln = strnlen(domain, 64);
3085                         SecurityBlob->DomainName.MaximumLength =
3086                             cpu_to_le16(ln);
3087                         SecurityBlob->DomainName.Buffer =
3088                             cpu_to_le32(SecurityBlobLength);
3089                         bcc_ptr += ln;
3090                         SecurityBlobLength += ln;
3091                         SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3092                 }
3093                 if (user == NULL) {
3094                         SecurityBlob->UserName.Buffer = 0;
3095                         SecurityBlob->UserName.Length = 0;
3096                         SecurityBlob->UserName.MaximumLength = 0;
3097                 } else {
3098                         __u16 ln;
3099                         strncpy(bcc_ptr, user, 63);
3100                         ln = strnlen(user, 64);
3101                         SecurityBlob->UserName.MaximumLength = cpu_to_le16(ln);
3102                         SecurityBlob->UserName.Buffer =
3103                                                 cpu_to_le32(SecurityBlobLength);
3104                         bcc_ptr += ln;
3105                         SecurityBlobLength += ln;
3106                         SecurityBlob->UserName.Length = cpu_to_le16(ln);
3107                 }
3108                 /* BB fill in our workstation name if known BB */
3109
3110                 strcpy(bcc_ptr, "Linux version ");
3111                 bcc_ptr += strlen("Linux version ");
3112                 strcpy(bcc_ptr, utsname()->release);
3113                 bcc_ptr += strlen(utsname()->release) + 1;
3114                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
3115                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
3116                 bcc_ptr++;      /* null domain */
3117                 *bcc_ptr = 0;
3118         }
3119         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
3120         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
3121         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
3122         smb_buffer->smb_buf_length += count;
3123         pSMB->req.ByteCount = cpu_to_le16(count);
3124
3125         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
3126                          &bytes_returned, CIFS_LONG_OP);
3127         if (rc) {
3128 /*   rc = map_smb_to_linux_error(smb_buffer_response) done in SendReceive now */
3129         } else if ((smb_buffer_response->WordCount == 3) ||
3130                    (smb_buffer_response->WordCount == 4)) {
3131                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
3132                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
3133                 if (action & GUEST_LOGIN)
3134                         cFYI(1, (" Guest login")); /* BB Should we set anything
3135                                                          in SesInfo struct ? */
3136 /*              if (SecurityBlob2->MessageType != NtLm??) {
3137                         cFYI("Unexpected message type on auth response is %d"));
3138                 } */
3139
3140                 if (ses) {
3141                         cFYI(1,
3142                              ("Check challenge UID %d vs auth response UID %d",
3143                               ses->Suid, smb_buffer_response->Uid));
3144                         /* UID left in wire format */
3145                         ses->Suid = smb_buffer_response->Uid;
3146                         bcc_ptr = pByteArea(smb_buffer_response);
3147                 /* response can have either 3 or 4 word count - Samba sends 3 */
3148                         if ((pSMBr->resp.hdr.WordCount == 3)
3149                             || ((pSMBr->resp.hdr.WordCount == 4)
3150                                 && (blob_len <
3151                                     pSMBr->resp.ByteCount))) {
3152                                 if (pSMBr->resp.hdr.WordCount == 4) {
3153                                         bcc_ptr +=
3154                                             blob_len;
3155                                         cFYI(1,
3156                                              ("Security Blob Length %d ",
3157                                               blob_len));
3158                                 }
3159
3160                                 cFYI(1,
3161                                      ("NTLMSSP response to Authenticate "));
3162
3163                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3164                                         if ((long) (bcc_ptr) % 2) {
3165                                                 remaining_words =
3166                                                     (BCC(smb_buffer_response)
3167                                                      - 1) / 2;
3168                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
3169                                         } else {
3170                                                 remaining_words = BCC(smb_buffer_response) / 2;
3171                                         }
3172                                         len = UniStrnlen((wchar_t *) bcc_ptr,
3173                                                         remaining_words - 1);
3174 /* We look for obvious messed up bcc or strings in response so we do not go off
3175   the end since (at least) WIN2K and Windows XP have a major bug in not null
3176   terminating last Unicode string in response  */
3177                                         if (ses->serverOS)
3178                                                 kfree(ses->serverOS);
3179                                         ses->serverOS =
3180                                             kzalloc(2 * (len + 1), GFP_KERNEL);
3181                                         cifs_strfromUCS_le(ses->serverOS,
3182                                                            (__le16 *)
3183                                                            bcc_ptr, len,
3184                                                            nls_codepage);
3185                                         bcc_ptr += 2 * (len + 1);
3186                                         remaining_words -= len + 1;
3187                                         ses->serverOS[2 * len] = 0;
3188                                         ses->serverOS[1 + (2 * len)] = 0;
3189                                         if (remaining_words > 0) {
3190                                                 len = UniStrnlen((wchar_t *)
3191                                                                  bcc_ptr,
3192                                                                  remaining_words
3193                                                                  - 1);
3194                                                 kfree(ses->serverNOS);
3195                                                 ses->serverNOS =
3196                                                     kzalloc(2 * (len + 1),
3197                                                             GFP_KERNEL);
3198                                                 cifs_strfromUCS_le(ses->
3199                                                                    serverNOS,
3200                                                                    (__le16 *)
3201                                                                    bcc_ptr,
3202                                                                    len,
3203                                                                    nls_codepage);
3204                                                 bcc_ptr += 2 * (len + 1);
3205                                                 ses->serverNOS[2 * len] = 0;
3206                                                 ses->serverNOS[1+(2*len)] = 0;
3207                                                 remaining_words -= len + 1;
3208                                                 if (remaining_words > 0) {
3209                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3210      /* last string not always null terminated (e.g. for Windows XP & 2000) */
3211                                                         if (ses->serverDomain)
3212                                                                 kfree(ses->serverDomain);
3213                                                         ses->serverDomain =
3214                                                             kzalloc(2 *
3215                                                                     (len +
3216                                                                      1),
3217                                                                     GFP_KERNEL);
3218                                                         cifs_strfromUCS_le
3219                                                             (ses->
3220                                                              serverDomain,
3221                                                              (__le16 *)
3222                                                              bcc_ptr, len,
3223                                                              nls_codepage);
3224                                                         bcc_ptr +=
3225                                                             2 * (len + 1);
3226                                                         ses->
3227                                                             serverDomain[2
3228                                                                          * len]
3229                                                             = 0;
3230                                                         ses->
3231                                                             serverDomain[1
3232                                                                          +
3233                                                                          (2
3234                                                                           *
3235                                                                           len)]
3236                                                             = 0;
3237                                                 } /* else no more room so create dummy domain string */
3238                                                 else {
3239                                                         if (ses->serverDomain)
3240                                                                 kfree(ses->serverDomain);
3241                                                         ses->serverDomain = kzalloc(2,GFP_KERNEL);
3242                                                 }
3243                                         } else {  /* no room so create dummy domain and NOS string */
3244                                                 if (ses->serverDomain)
3245                                                         kfree(ses->serverDomain);
3246                                                 ses->serverDomain = kzalloc(2, GFP_KERNEL);
3247                                                 kfree(ses->serverNOS);
3248                                                 ses->serverNOS = kzalloc(2, GFP_KERNEL);
3249                                         }
3250                                 } else {        /* ASCII */
3251                                         len = strnlen(bcc_ptr, 1024);
3252                                         if (((long) bcc_ptr + len) -
3253                                            (long) pByteArea(smb_buffer_response)
3254                                                 <= BCC(smb_buffer_response)) {
3255                                                 if (ses->serverOS)
3256                                                         kfree(ses->serverOS);
3257                                                 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
3258                                                 strncpy(ses->serverOS,bcc_ptr, len);
3259
3260                                                 bcc_ptr += len;
3261                                                 bcc_ptr[0] = 0; /* null terminate the string */
3262                                                 bcc_ptr++;
3263
3264                                                 len = strnlen(bcc_ptr, 1024);
3265                                                 kfree(ses->serverNOS);
3266                                                 ses->serverNOS = kzalloc(len+1,
3267                                                                     GFP_KERNEL);
3268                                                 strncpy(ses->serverNOS,
3269                                                         bcc_ptr, len);
3270                                                 bcc_ptr += len;
3271                                                 bcc_ptr[0] = 0;
3272                                                 bcc_ptr++;
3273
3274                                                 len = strnlen(bcc_ptr, 1024);
3275                                                 if (ses->serverDomain)
3276                                                         kfree(ses->serverDomain);
3277                                                 ses->serverDomain =
3278                                                                 kzalloc(len+1,
3279                                                                     GFP_KERNEL);
3280                                                 strncpy(ses->serverDomain,
3281                                                         bcc_ptr, len);
3282                                                 bcc_ptr += len;
3283                                                 bcc_ptr[0] = 0;
3284                                                 bcc_ptr++;
3285                                         } else
3286                                                 cFYI(1, ("field of length %d "
3287                                                    "extends beyond end of smb ",
3288                                                       len));
3289                                 }
3290                         } else {
3291                                 cERROR(1, ("Security Blob extends beyond end "
3292                                         "of SMB"));
3293                         }
3294                 } else {
3295                         cERROR(1, ("No session structure passed in."));
3296                 }
3297         } else {
3298                 cERROR(1, ("Invalid Word count %d: ",
3299                         smb_buffer_response->WordCount));
3300                 rc = -EIO;
3301         }
3302
3303         cifs_buf_release(smb_buffer);
3304
3305         return rc;
3306 }
3307
3308 int
3309 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
3310          const char *tree, struct cifsTconInfo *tcon,
3311          const struct nls_table *nls_codepage)
3312 {
3313         struct smb_hdr *smb_buffer;
3314         struct smb_hdr *smb_buffer_response;
3315         TCONX_REQ *pSMB;
3316         TCONX_RSP *pSMBr;
3317         unsigned char *bcc_ptr;
3318         int rc = 0;
3319         int length;
3320         __u16 count;
3321
3322         if (ses == NULL)
3323                 return -EIO;
3324
3325         smb_buffer = cifs_buf_get();
3326         if (smb_buffer == NULL) {
3327                 return -ENOMEM;
3328         }
3329         smb_buffer_response = smb_buffer;
3330
3331         header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3332                         NULL /*no tid */ , 4 /*wct */ );
3333
3334         smb_buffer->Mid = GetNextMid(ses->server);
3335         smb_buffer->Uid = ses->Suid;
3336         pSMB = (TCONX_REQ *) smb_buffer;
3337         pSMBr = (TCONX_RSP *) smb_buffer_response;
3338
3339         pSMB->AndXCommand = 0xFF;
3340         pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3341         bcc_ptr = &pSMB->Password[0];
3342         if ((ses->server->secMode) & SECMODE_USER) {
3343                 pSMB->PasswordLength = cpu_to_le16(1);  /* minimum */
3344                 *bcc_ptr = 0; /* password is null byte */
3345                 bcc_ptr++;              /* skip password */
3346                 /* already aligned so no need to do it below */
3347         } else {
3348                 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
3349                 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3350                    specified as required (when that support is added to
3351                    the vfs in the future) as only NTLM or the much
3352                    weaker LANMAN (which we do not send by default) is accepted
3353                    by Samba (not sure whether other servers allow
3354                    NTLMv2 password here) */
3355 #ifdef CONFIG_CIFS_WEAK_PW_HASH
3356                 if ((extended_security & CIFSSEC_MAY_LANMAN) &&
3357                         (ses->server->secType == LANMAN))
3358                         calc_lanman_hash(ses, bcc_ptr);
3359                 else
3360 #endif /* CIFS_WEAK_PW_HASH */
3361                 SMBNTencrypt(ses->password,
3362                              ses->server->cryptKey,
3363                              bcc_ptr);
3364
3365                 bcc_ptr += CIFS_SESS_KEY_SIZE;
3366                 if (ses->capabilities & CAP_UNICODE) {
3367                         /* must align unicode strings */
3368                         *bcc_ptr = 0; /* null byte password */
3369                         bcc_ptr++;
3370                 }
3371         }
3372
3373         if (ses->server->secMode &
3374                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3375                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3376
3377         if (ses->capabilities & CAP_STATUS32) {
3378                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3379         }
3380         if (ses->capabilities & CAP_DFS) {
3381                 smb_buffer->Flags2 |= SMBFLG2_DFS;
3382         }
3383         if (ses->capabilities & CAP_UNICODE) {
3384                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3385                 length =
3386                     cifs_strtoUCS((__le16 *) bcc_ptr, tree,
3387                         6 /* max utf8 char length in bytes */ *
3388                         (/* server len*/ + 256 /* share len */), nls_codepage);
3389                 bcc_ptr += 2 * length;  /* convert num 16 bit words to bytes */
3390                 bcc_ptr += 2;   /* skip trailing null */
3391         } else {                /* ASCII */
3392                 strcpy(bcc_ptr, tree);
3393                 bcc_ptr += strlen(tree) + 1;
3394         }
3395         strcpy(bcc_ptr, "?????");
3396         bcc_ptr += strlen("?????");
3397         bcc_ptr += 1;
3398         count = bcc_ptr - &pSMB->Password[0];
3399         pSMB->hdr.smb_buf_length += count;
3400         pSMB->ByteCount = cpu_to_le16(count);
3401
3402         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
3403                          CIFS_STD_OP);
3404
3405         /* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
3406         /* above now done in SendReceive */
3407         if ((rc == 0) && (tcon != NULL)) {
3408                 tcon->tidStatus = CifsGood;
3409                 tcon->tid = smb_buffer_response->Tid;
3410                 bcc_ptr = pByteArea(smb_buffer_response);
3411                 length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
3412                 /* skip service field (NB: this field is always ASCII) */
3413                 if (length == 3) {
3414                         if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3415                             (bcc_ptr[2] == 'C')) {
3416                                 cFYI(1, ("IPC connection"));
3417                                 tcon->ipc = 1;
3418                         }
3419                 } else if (length == 2) {
3420                         if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3421                                 /* the most common case */
3422                                 cFYI(1, ("disk share connection"));
3423                         }
3424                 }
3425                 bcc_ptr += length + 1;
3426                 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3427                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3428                         length = UniStrnlen((wchar_t *) bcc_ptr, 512);
3429                         if ((bcc_ptr + (2 * length)) -
3430                              pByteArea(smb_buffer_response) <=
3431                             BCC(smb_buffer_response)) {
3432                                 kfree(tcon->nativeFileSystem);
3433                                 tcon->nativeFileSystem =
3434                                     kzalloc(length + 2, GFP_KERNEL);
3435                                 if (tcon->nativeFileSystem)
3436                                         cifs_strfromUCS_le(
3437                                                 tcon->nativeFileSystem,
3438                                                 (__le16 *) bcc_ptr,
3439                                                 length, nls_codepage);
3440                                 bcc_ptr += 2 * length;
3441                                 bcc_ptr[0] = 0; /* null terminate the string */
3442                                 bcc_ptr[1] = 0;
3443                                 bcc_ptr += 2;
3444                         }
3445                         /* else do not bother copying these information fields*/
3446                 } else {
3447                         length = strnlen(bcc_ptr, 1024);
3448                         if ((bcc_ptr + length) -
3449                             pByteArea(smb_buffer_response) <=
3450                             BCC(smb_buffer_response)) {
3451                                 kfree(tcon->nativeFileSystem);
3452                                 tcon->nativeFileSystem =
3453                                     kzalloc(length + 1, GFP_KERNEL);
3454                                 if (tcon->nativeFileSystem)
3455                                         strncpy(tcon->nativeFileSystem, bcc_ptr,
3456                                                 length);
3457                         }
3458                         /* else do not bother copying these information fields*/
3459                 }
3460                 if ((smb_buffer_response->WordCount == 3) ||
3461                          (smb_buffer_response->WordCount == 7))
3462                         /* field is in same location */
3463                         tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3464                 else
3465                         tcon->Flags = 0;
3466                 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
3467         } else if ((rc == 0) && tcon == NULL) {
3468                 /* all we need to save for IPC$ connection */
3469                 ses->ipc_tid = smb_buffer_response->Tid;
3470         }
3471
3472         cifs_buf_release(smb_buffer);
3473         return rc;
3474 }
3475
3476 int
3477 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3478 {
3479         int rc = 0;
3480         int xid;
3481         struct cifsSesInfo *ses = NULL;
3482         struct task_struct *cifsd_task;
3483         char *tmp;
3484
3485         xid = GetXid();
3486
3487         if (cifs_sb->tcon) {
3488                 ses = cifs_sb->tcon->ses; /* save ptr to ses before delete tcon!*/
3489                 rc = CIFSSMBTDis(xid, cifs_sb->tcon);
3490                 if (rc == -EBUSY) {
3491                         FreeXid(xid);
3492                         return 0;
3493                 }
3494                 tconInfoFree(cifs_sb->tcon);
3495                 if ((ses) && (ses->server)) {
3496                         /* save off task so we do not refer to ses later */
3497                         cifsd_task = ses->server->tsk;
3498                         cFYI(1, ("About to do SMBLogoff "));
3499                         rc = CIFSSMBLogoff(xid, ses);
3500                         if (rc == -EBUSY) {
3501                                 FreeXid(xid);
3502                                 return 0;
3503                         } else if (rc == -ESHUTDOWN) {
3504                                 cFYI(1, ("Waking up socket by sending signal"));
3505                                 if (cifsd_task) {
3506                                         force_sig(SIGKILL, cifsd_task);
3507                                         kthread_stop(cifsd_task);
3508                                 }
3509                                 rc = 0;
3510                         } /* else - we have an smb session
3511                                 left on this socket do not kill cifsd */
3512                 } else
3513                         cFYI(1, ("No session or bad tcon"));
3514         }
3515
3516         cifs_sb->tcon = NULL;
3517         tmp = cifs_sb->prepath;
3518         cifs_sb->prepathlen = 0;
3519         cifs_sb->prepath = NULL;
3520         kfree(tmp);
3521         if (ses)
3522                 schedule_timeout_interruptible(msecs_to_jiffies(500));
3523         if (ses)
3524                 sesInfoFree(ses);
3525
3526         FreeXid(xid);
3527         return rc;
3528 }
3529
3530 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3531                                            struct nls_table *nls_info)
3532 {
3533         int rc = 0;
3534         char ntlm_session_key[CIFS_SESS_KEY_SIZE];
3535         int ntlmv2_flag = FALSE;
3536         int first_time = 0;
3537
3538         /* what if server changes its buffer size after dropping the session? */
3539         if (pSesInfo->server->maxBuf == 0) /* no need to send on reconnect */ {
3540                 rc = CIFSSMBNegotiate(xid, pSesInfo);
3541                 if (rc == -EAGAIN) /* retry only once on 1st time connection */ {
3542                         rc = CIFSSMBNegotiate(xid, pSesInfo);
3543                         if (rc == -EAGAIN)
3544                                 rc = -EHOSTDOWN;
3545                 }
3546                 if (rc == 0) {
3547                         spin_lock(&GlobalMid_Lock);
3548                         if (pSesInfo->server->tcpStatus != CifsExiting)
3549                                 pSesInfo->server->tcpStatus = CifsGood;
3550                         else
3551                                 rc = -EHOSTDOWN;
3552                         spin_unlock(&GlobalMid_Lock);
3553
3554                 }
3555                 first_time = 1;
3556         }
3557         if (!rc) {
3558                 pSesInfo->flags = 0;
3559                 pSesInfo->capabilities = pSesInfo->server->capabilities;
3560                 if (linuxExtEnabled == 0)
3561                         pSesInfo->capabilities &= (~CAP_UNIX);
3562         /*      pSesInfo->sequence_number = 0;*/
3563                 cFYI(1,
3564                       ("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3565                         pSesInfo->server->secMode,
3566                         pSesInfo->server->capabilities,
3567                         pSesInfo->server->timeAdj));
3568                 if (experimEnabled < 2)
3569                         rc = CIFS_SessSetup(xid, pSesInfo,
3570                                             first_time, nls_info);
3571                 else if (extended_security
3572                                 && (pSesInfo->capabilities
3573                                         & CAP_EXTENDED_SECURITY)
3574                                 && (pSesInfo->server->secType == NTLMSSP)) {
3575                         rc = -EOPNOTSUPP;
3576                 } else if (extended_security
3577                            && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3578                            && (pSesInfo->server->secType == RawNTLMSSP)) {
3579                         cFYI(1, ("NTLMSSP sesssetup"));
3580                         rc = CIFSNTLMSSPNegotiateSessSetup(xid,
3581                                                 pSesInfo,
3582                                                 &ntlmv2_flag,
3583                                                 nls_info);
3584                         if (!rc) {
3585                                 if (ntlmv2_flag) {
3586                                         char *v2_response;
3587                                         cFYI(1, ("more secure NTLM ver2 hash"));
3588                                         if (CalcNTLMv2_partial_mac_key(pSesInfo,
3589                                                 nls_info)) {
3590                                                 rc = -ENOMEM;
3591                                                 goto ss_err_exit;
3592                                         } else
3593                                                 v2_response = kmalloc(16 + 64 /* blob */, GFP_KERNEL);
3594                                         if (v2_response) {
3595                                                 CalcNTLMv2_response(pSesInfo,
3596                                                                    v2_response);
3597                                 /*              if (first_time)
3598                                                   cifs_calculate_ntlmv2_mac_key(
3599                                                    pSesInfo->server->mac_signing_key,
3600                                                    response, ntlm_session_key,*/
3601                                                 kfree(v2_response);
3602                                         /* BB Put dummy sig in SessSetup PDU? */
3603                                         } else {
3604                                                 rc = -ENOMEM;
3605                                                 goto ss_err_exit;
3606                                         }
3607
3608                                 } else {
3609                                         SMBNTencrypt(pSesInfo->password,
3610                                                 pSesInfo->server->cryptKey,
3611                                                 ntlm_session_key);
3612
3613                                         if (first_time)
3614                                                 cifs_calculate_mac_key(
3615                                                         &pSesInfo->server->mac_signing_key,
3616                                                         ntlm_session_key,
3617                                                         pSesInfo->password);
3618                                 }
3619                         /* for better security the weaker lanman hash not sent
3620                            in AuthSessSetup so we no longer calculate it */
3621
3622                                 rc = CIFSNTLMSSPAuthSessSetup(xid,
3623                                         pSesInfo,
3624                                         ntlm_session_key,
3625                                         ntlmv2_flag,
3626                                         nls_info);
3627                         }
3628                 } else { /* old style NTLM 0.12 session setup */
3629                         SMBNTencrypt(pSesInfo->password,
3630                                 pSesInfo->server->cryptKey,
3631                                 ntlm_session_key);
3632
3633                         if (first_time)
3634                                 cifs_calculate_mac_key(
3635                                         &pSesInfo->server->mac_signing_key,
3636                                         ntlm_session_key, pSesInfo->password);
3637
3638                         rc = CIFSSessSetup(xid, pSesInfo,
3639                                 ntlm_session_key, nls_info);
3640                 }
3641                 if (rc) {
3642                         cERROR(1, ("Send error in SessSetup = %d", rc));
3643                 } else {
3644                         cFYI(1, ("CIFS Session Established successfully"));
3645                         pSesInfo->status = CifsGood;
3646                 }
3647         }
3648 ss_err_exit:
3649         return rc;
3650 }
3651