fs/cifs/connect.c

   1 /*
   2  *   fs/cifs/connect.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2007
   5  *   Author(s): Steve French (sfrench@us.ibm.com)
   6  *
   7  *   This library is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU Lesser General Public License as published
   9  *   by the Free Software Foundation; either version 2.1 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This library is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  15  *   the GNU Lesser General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU Lesser General Public License
  18  *   along with this library; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21 #include <linux/fs.h>
  22 #include <linux/net.h>
  23 #include <linux/string.h>
  24 #include <linux/list.h>
  25 #include <linux/wait.h>
  26 #include <linux/ipv6.h>
  27 #include <linux/pagemap.h>
  28 #include <linux/ctype.h>
  29 #include <linux/utsname.h>
  30 #include <linux/mempool.h>
  31 #include <linux/delay.h>
  32 #include <linux/completion.h>
  33 #include <linux/kthread.h>
  34 #include <linux/pagevec.h>
  35 #include <linux/freezer.h>
  36 #include <asm/uaccess.h>
  37 #include <asm/processor.h>
  38 #include "cifspdu.h"
  39 #include "cifsglob.h"
  40 #include "cifsproto.h"
  41 #include "cifs_unicode.h"
  42 #include "cifs_debug.h"
  43 #include "cifs_fs_sb.h"
  44 #include "ntlmssp.h"
  45 #include "nterr.h"
  46 #include "rfc1002pdu.h"
  47 #include "cn_cifs.h"
  48
  49 #define CIFS_PORT 445
  50 #define RFC1001_PORT 139
  51
  52 static DECLARE_COMPLETION(cifsd_complete);
  53
  54 extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
  55                          unsigned char *p24);
  56
  57 extern mempool_t *cifs_req_poolp;
  58
  59 struct smb_vol {
  60         char *username;
  61         char *password;
  62         char *domainname;
  63         char *UNC;
  64         char *UNCip;
  65         char *in6_addr;  /* ipv6 address as human readable form of in6_addr */
  66         char *iocharset;  /* local code page for mapping to and from Unicode */
  67         char source_rfc1001_name[16]; /* netbios name of client */
  68         char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
  69         uid_t linux_uid;
  70         gid_t linux_gid;
  71         mode_t file_mode;
  72         mode_t dir_mode;
  73         unsigned secFlg;
  74         unsigned rw:1;
  75         unsigned retry:1;
  76         unsigned intr:1;
  77         unsigned setuids:1;
  78         unsigned override_uid:1;
  79         unsigned override_gid:1;
  80         unsigned noperm:1;
  81         unsigned no_psx_acl:1; /* set if posix acl support should be disabled */
  82         unsigned cifs_acl:1;
  83         unsigned no_xattr:1;   /* set if xattr (EA) support should be disabled*/
  84         unsigned server_ino:1; /* use inode numbers from server ie UniqueId */
  85         unsigned direct_io:1;
  86         unsigned remap:1;   /* set to remap seven reserved chars in filenames */
  87         unsigned posix_paths:1;   /* unset to not ask for posix pathnames. */
  88         unsigned 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 < 4) {
 442                         cFYI(1, ("less than four bytes received (%d bytes)",
 443                               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);
 756         if (length  > 0)
 757                 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
 758                                 GFP_KERNEL);
 759
 760         return 0;
 761 }
 762
 763 static int
 764 cifs_parse_mount_options(char *options, const char *devname,
 765                          struct smb_vol *vol)
 766 {
 767         char *value;
 768         char *data;
 769         unsigned int  temp_len, i, j;
 770         char separator[2];
 771
 772         separator[0] = ',';
 773         separator[1] = 0;
 774
 775         if (Local_System_Name[0] != 0)
 776                 memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
 777         else {
 778                 char *nodename = utsname()->nodename;
 779                 int n = strnlen(nodename, 15);
 780                 memset(vol->source_rfc1001_name, 0x20, 15);
 781                 for (i = 0; i < n; i++) {
 782                         /* does not have to be perfect mapping since field is
 783                         informational, only used for servers that do not support
 784                         port 445 and it can be overridden at mount time */
 785                         vol->source_rfc1001_name[i] = toupper(nodename[i]);
 786                 }
 787         }
 788         vol->source_rfc1001_name[15] = 0;
 789         /* null target name indicates to use *SMBSERVR default called name
 790            if we end up sending RFC1001 session initialize */
 791         vol->target_rfc1001_name[0] = 0;
 792         vol->linux_uid = current->uid;  /* current->euid instead? */
 793         vol->linux_gid = current->gid;
 794         vol->dir_mode = S_IRWXUGO;
 795         /* 2767 perms indicate mandatory locking support */
 796         vol->file_mode = (S_IRWXUGO | S_ISGID) & (~S_IXGRP);
 797
 798         /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
 799         vol->rw = TRUE;
 800         /* default is always to request posix paths. */
 801         vol->posix_paths = 1;
 802
 803         if (!options)
 804                 return 1;
 805
 806         if (strncmp(options, "sep=", 4) == 0) {
 807                 if (options[4] != 0) {
 808                         separator[0] = options[4];
 809                         options += 5;
 810                 } else {
 811                         cFYI(1, ("Null separator not allowed"));
 812                 }
 813         }
 814
 815         while ((data = strsep(&options, separator)) != NULL) {
 816                 if (!*data)
 817                         continue;
 818                 if ((value = strchr(data, '=')) != NULL)
 819                         *value++ = '\0';
 820
 821                 /* Have to parse this before we parse for "user" */
 822                 if (strnicmp(data, "user_xattr", 10) == 0) {
 823                         vol->no_xattr = 0;
 824                 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
 825                         vol->no_xattr = 1;
 826                 } else if (strnicmp(data, "user", 4) == 0) {
 827                         if (!value) {
 828                                 printk(KERN_WARNING
 829                                        "CIFS: invalid or missing username\n");
 830                                 return 1;       /* needs_arg; */
 831                         } else if (!*value) {
 832                                 /* null user, ie anonymous, authentication */
 833                                 vol->nullauth = 1;
 834                         }
 835                         if (strnlen(value, 200) < 200) {
 836                                 vol->username = value;
 837                         } else {
 838                                 printk(KERN_WARNING "CIFS: username too long\n");
 839                                 return 1;
 840                         }
 841                 } else if (strnicmp(data, "pass", 4) == 0) {
 842                         if (!value) {
 843                                 vol->password = NULL;
 844                                 continue;
 845                         } else if (value[0] == 0) {
 846                                 /* check if string begins with double comma
 847                                    since that would mean the password really
 848                                    does start with a comma, and would not
 849                                    indicate an empty string */
 850                                 if (value[1] != separator[0]) {
 851                                         vol->password = NULL;
 852                                         continue;
 853                                 }
 854                         }
 855                         temp_len = strlen(value);
 856                         /* removed password length check, NTLM passwords
 857                                 can be arbitrarily long */
 858
 859                         /* if comma in password, the string will be
 860                         prematurely null terminated.  Commas in password are
 861                         specified across the cifs mount interface by a double
 862                         comma ie ,, and a comma used as in other cases ie ','
 863                         as a parameter delimiter/separator is single and due
 864                         to the strsep above is temporarily zeroed. */
 865
 866                         /* NB: password legally can have multiple commas and
 867                         the only illegal character in a password is null */
 868
 869                         if ((value[temp_len] == 0) &&
 870                             (value[temp_len+1] == separator[0])) {
 871                                 /* reinsert comma */
 872                                 value[temp_len] = separator[0];
 873                                 temp_len += 2;  /* move after second comma */
 874                                 while (value[temp_len] != 0)  {
 875                                         if (value[temp_len] == separator[0]) {
 876                                                 if (value[temp_len+1] ==
 877                                                      separator[0]) {
 878                                                 /* skip second comma */
 879                                                         temp_len++;
 880                                                 } else {
 881                                                 /* single comma indicating start
 882                                                          of next parm */
 883                                                         break;
 884                                                 }
 885                                         }
 886                                         temp_len++;
 887                                 }
 888                                 if (value[temp_len] == 0) {
 889                                         options = NULL;
 890                                 } else {
 891                                         value[temp_len] = 0;
 892                                         /* point option to start of next parm */
 893                                         options = value + temp_len + 1;
 894                                 }
 895                                 /* go from value to value + temp_len condensing
 896                                 double commas to singles. Note that this ends up
 897                                 allocating a few bytes too many, which is ok */
 898                                 vol->password = kzalloc(temp_len, GFP_KERNEL);
 899                                 if (vol->password == NULL) {
 900                                         printk(KERN_WARNING "CIFS: no memory "
 901                                                             "for password\n");
 902                                         return 1;
 903                                 }
 904                                 for (i = 0, j = 0; i < temp_len; i++, j++) {
 905                                         vol->password[j] = value[i];
 906                                         if (value[i] == separator[0]
 907                                                 && value[i+1] == separator[0]) {
 908                                                 /* skip second comma */
 909                                                 i++;
 910                                         }
 911                                 }
 912                                 vol->password[j] = 0;
 913                         } else {
 914                                 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
 915                                 if (vol->password == NULL) {
 916                                         printk(KERN_WARNING "CIFS: no memory "
 917                                                             "for password\n");
 918                                         return 1;
 919                                 }
 920                                 strcpy(vol->password, value);
 921                         }
 922                 } else if (strnicmp(data, "ip", 2) == 0) {
 923                         if (!value || !*value) {
 924                                 vol->UNCip = NULL;
 925                         } else if (strnlen(value, 35) < 35) {
 926                                 vol->UNCip = value;
 927                         } else {
 928                                 printk(KERN_WARNING "CIFS: ip address "
 929                                                     "too long\n");
 930                                 return 1;
 931                         }
 932                 } else if (strnicmp(data, "sec", 3) == 0) {
 933                         if (!value || !*value) {
 934                                 cERROR(1, ("no security value specified"));
 935                                 continue;
 936                         } else if (strnicmp(value, "krb5i", 5) == 0) {
 937                                 vol->secFlg |= CIFSSEC_MAY_KRB5 |
 938                                         CIFSSEC_MUST_SIGN;
 939                         } else if (strnicmp(value, "krb5p", 5) == 0) {
 940                                 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
 941                                         CIFSSEC_MAY_KRB5; */
 942                                 cERROR(1, ("Krb5 cifs privacy not supported"));
 943                                 return 1;
 944                         } else if (strnicmp(value, "krb5", 4) == 0) {
 945                                 vol->secFlg |= CIFSSEC_MAY_KRB5;
 946                         } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
 947                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
 948                                         CIFSSEC_MUST_SIGN;
 949                         } else if (strnicmp(value, "ntlmv2", 6) == 0) {
 950                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
 951                         } else if (strnicmp(value, "ntlmi", 5) == 0) {
 952                                 vol->secFlg |= CIFSSEC_MAY_NTLM |
 953                                         CIFSSEC_MUST_SIGN;
 954                         } else if (strnicmp(value, "ntlm", 4) == 0) {
 955                                 /* ntlm is default so can be turned off too */
 956                                 vol->secFlg |= CIFSSEC_MAY_NTLM;
 957                         } else if (strnicmp(value, "nontlm", 6) == 0) {
 958                                 /* BB is there a better way to do this? */
 959                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
 960 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 961                         } else if (strnicmp(value, "lanman", 6) == 0) {
 962                                 vol->secFlg |= CIFSSEC_MAY_LANMAN;
 963 #endif
 964                         } else if (strnicmp(value, "none", 4) == 0) {
 965                                 vol->nullauth = 1;
 966                         } else {
 967                                 cERROR(1, ("bad security option: %s", value));
 968                                 return 1;
 969                         }
 970                 } else if ((strnicmp(data, "unc", 3) == 0)
 971                            || (strnicmp(data, "target", 6) == 0)
 972                            || (strnicmp(data, "path", 4) == 0)) {
 973                         if (!value || !*value) {
 974                                 printk(KERN_WARNING "CIFS: invalid path to "
 975                                                     "network resource\n");
 976                                 return 1;       /* needs_arg; */
 977                         }
 978                         if ((temp_len = strnlen(value, 300)) < 300) {
 979                                 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
 980                                 if (vol->UNC == NULL)
 981                                         return 1;
 982                                 strcpy(vol->UNC, value);
 983                                 if (strncmp(vol->UNC, "//", 2) == 0) {
 984                                         vol->UNC[0] = '\\';
 985                                         vol->UNC[1] = '\\';
 986                                 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
 987                                         printk(KERN_WARNING
 988                                                "CIFS: UNC Path does not begin "
 989                                                "with // or \\\\ \n");
 990                                         return 1;
 991                                 }
 992                         } else {
 993                                 printk(KERN_WARNING "CIFS: UNC name too long\n");
 994                                 return 1;
 995                         }
 996                 } else if ((strnicmp(data, "domain", 3) == 0)
 997                            || (strnicmp(data, "workgroup", 5) == 0)) {
 998                         if (!value || !*value) {
 999                                 printk(KERN_WARNING "CIFS: invalid domain name\n");
1000                                 return 1;       /* needs_arg; */
1001                         }
1002                         /* BB are there cases in which a comma can be valid in
1003                         a domain name and need special handling? */
1004                         if (strnlen(value, 256) < 256) {
1005                                 vol->domainname = value;
1006                                 cFYI(1, ("Domain name set"));
1007                         } else {
1008                                 printk(KERN_WARNING "CIFS: domain name too "
1009                                                     "long\n");
1010                                 return 1;
1011                         }
1012                 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1013                         if (!value || !*value) {
1014                                 printk(KERN_WARNING
1015                                         "CIFS: invalid path prefix\n");
1016                                 return 1;       /* needs_argument */
1017                         }
1018                         if ((temp_len = strnlen(value, 1024)) < 1024) {
1019                                 if (value[0] != '/')
1020                                         temp_len++;  /* missing leading slash */
1021                                 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1022                                 if (vol->prepath == NULL)
1023                                         return 1;
1024                                 if (value[0] != '/') {
1025                                         vol->prepath[0] = '/';
1026                                         strcpy(vol->prepath+1, value);
1027                                 } else
1028                                         strcpy(vol->prepath, value);
1029                                 cFYI(1, ("prefix path %s", vol->prepath));
1030                         } else {
1031                                 printk(KERN_WARNING "CIFS: prefix too long\n");
1032                                 return 1;
1033                         }
1034                 } else if (strnicmp(data, "iocharset", 9) == 0) {
1035                         if (!value || !*value) {
1036                                 printk(KERN_WARNING "CIFS: invalid iocharset "
1037                                                     "specified\n");
1038                                 return 1;       /* needs_arg; */
1039                         }
1040                         if (strnlen(value, 65) < 65) {
1041                                 if (strnicmp(value, "default", 7))
1042                                         vol->iocharset = value;
1043                                 /* if iocharset not set then load_nls_default
1044                                    is used by caller */
1045                                 cFYI(1, ("iocharset set to %s", value));
1046                         } else {
1047                                 printk(KERN_WARNING "CIFS: iocharset name "
1048                                                     "too long.\n");
1049                                 return 1;
1050                         }
1051                 } else if (strnicmp(data, "uid", 3) == 0) {
1052                         if (value && *value) {
1053                                 vol->linux_uid =
1054                                         simple_strtoul(value, &value, 0);
1055                                 vol->override_uid = 1;
1056                         }
1057                 } else if (strnicmp(data, "gid", 3) == 0) {
1058                         if (value && *value) {
1059                                 vol->linux_gid =
1060                                         simple_strtoul(value, &value, 0);
1061                                 vol->override_gid = 1;
1062                         }
1063                 } else if (strnicmp(data, "file_mode", 4) == 0) {
1064                         if (value && *value) {
1065                                 vol->file_mode =
1066                                         simple_strtoul(value, &value, 0);
1067                         }
1068                 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1069                         if (value && *value) {
1070                                 vol->dir_mode =
1071                                         simple_strtoul(value, &value, 0);
1072                         }
1073                 } else if (strnicmp(data, "dirmode", 4) == 0) {
1074                         if (value && *value) {
1075                                 vol->dir_mode =
1076                                         simple_strtoul(value, &value, 0);
1077                         }
1078                 } else if (strnicmp(data, "port", 4) == 0) {
1079                         if (value && *value) {
1080                                 vol->port =
1081                                         simple_strtoul(value, &value, 0);
1082                         }
1083                 } else if (strnicmp(data, "rsize", 5) == 0) {
1084                         if (value && *value) {
1085                                 vol->rsize =
1086                                         simple_strtoul(value, &value, 0);
1087                         }
1088                 } else if (strnicmp(data, "wsize", 5) == 0) {
1089                         if (value && *value) {
1090                                 vol->wsize =
1091                                         simple_strtoul(value, &value, 0);
1092                         }
1093                 } else if (strnicmp(data, "sockopt", 5) == 0) {
1094                         if (value && *value) {
1095                                 vol->sockopt =
1096                                         simple_strtoul(value, &value, 0);
1097                         }
1098                 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1099                         if (!value || !*value || (*value == ' ')) {
1100                                 cFYI(1, ("invalid (empty) netbiosname"));
1101                         } else {
1102                                 memset(vol->source_rfc1001_name, 0x20, 15);
1103                                 for (i = 0; i < 15; i++) {
1104                                 /* BB are there cases in which a comma can be
1105                                 valid in this workstation netbios name (and need
1106                                 special handling)? */
1107
1108                                 /* We do not uppercase netbiosname for user */
1109                                         if (value[i] == 0)
1110                                                 break;
1111                                         else
1112                                                 vol->source_rfc1001_name[i] =
1113                                                                 value[i];
1114                                 }
1115                                 /* The string has 16th byte zero still from
1116                                 set at top of the function  */
1117                                 if ((i == 15) && (value[i] != 0))
1118                                         printk(KERN_WARNING "CIFS: netbiosname"
1119                                                 " longer than 15 truncated.\n");
1120                         }
1121                 } else if (strnicmp(data, "servern", 7) == 0) {
1122                         /* servernetbiosname specified override *SMBSERVER */
1123                         if (!value || !*value || (*value == ' ')) {
1124                                 cFYI(1, ("empty server netbiosname specified"));
1125                         } else {
1126                                 /* last byte, type, is 0x20 for servr type */
1127                                 memset(vol->target_rfc1001_name, 0x20, 16);
1128
1129                                 for (i = 0; i < 15; i++) {
1130                                 /* BB are there cases in which a comma can be
1131                                    valid in this workstation netbios name
1132                                    (and need special handling)? */
1133
1134                                 /* user or mount helper must uppercase
1135                                    the netbiosname */
1136                                         if (value[i] == 0)
1137                                                 break;
1138                                         else
1139                                                 vol->target_rfc1001_name[i] =
1140                                                                 value[i];
1141                                 }
1142                                 /* The string has 16th byte zero still from
1143                                    set at top of the function  */
1144                                 if ((i == 15) && (value[i] != 0))
1145                                         printk(KERN_WARNING "CIFS: server net"
1146                                         "biosname longer than 15 truncated.\n");
1147                         }
1148                 } else if (strnicmp(data, "credentials", 4) == 0) {
1149                         /* ignore */
1150                 } else if (strnicmp(data, "version", 3) == 0) {
1151                         /* ignore */
1152                 } else if (strnicmp(data, "guest", 5) == 0) {
1153                         /* ignore */
1154                 } else if (strnicmp(data, "rw", 2) == 0) {
1155                         vol->rw = TRUE;
1156                 } else if ((strnicmp(data, "suid", 4) == 0) ||
1157                                    (strnicmp(data, "nosuid", 6) == 0) ||
1158                                    (strnicmp(data, "exec", 4) == 0) ||
1159                                    (strnicmp(data, "noexec", 6) == 0) ||
1160                                    (strnicmp(data, "nodev", 5) == 0) ||
1161                                    (strnicmp(data, "noauto", 6) == 0) ||
1162                                    (strnicmp(data, "dev", 3) == 0)) {
1163                         /*  The mount tool or mount.cifs helper (if present)
1164                             uses these opts to set flags, and the flags are read
1165                             by the kernel vfs layer before we get here (ie
1166                             before read super) so there is no point trying to
1167                             parse these options again and set anything and it
1168                             is ok to just ignore them */
1169                         continue;
1170                 } else if (strnicmp(data, "ro", 2) == 0) {
1171                         vol->rw = FALSE;
1172                 } else if (strnicmp(data, "hard", 4) == 0) {
1173                         vol->retry = 1;
1174                 } else if (strnicmp(data, "soft", 4) == 0) {
1175                         vol->retry = 0;
1176                 } else if (strnicmp(data, "perm", 4) == 0) {
1177                         vol->noperm = 0;
1178                 } else if (strnicmp(data, "noperm", 6) == 0) {
1179                         vol->noperm = 1;
1180                 } else if (strnicmp(data, "mapchars", 8) == 0) {
1181                         vol->remap = 1;
1182                 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1183                         vol->remap = 0;
1184                 } else if (strnicmp(data, "sfu", 3) == 0) {
1185                         vol->sfu_emul = 1;
1186                 } else if (strnicmp(data, "nosfu", 5) == 0) {
1187                         vol->sfu_emul = 0;
1188                 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1189                         vol->posix_paths = 1;
1190                 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1191                         vol->posix_paths = 0;
1192                 } else if (strnicmp(data, "nounix", 6) == 0) {
1193                         vol->no_linux_ext = 1;
1194                 } else if (strnicmp(data, "nolinux", 7) == 0) {
1195                         vol->no_linux_ext = 1;
1196                 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1197                            (strnicmp(data, "ignorecase", 10)  == 0)) {
1198                         vol->nocase = 1;
1199                 } else if (strnicmp(data, "brl", 3) == 0) {
1200                         vol->nobrl =  0;
1201                 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1202                            (strnicmp(data, "nolock", 6) == 0)) {
1203                         vol->nobrl =  1;
1204                         /* turn off mandatory locking in mode
1205                         if remote locking is turned off since the
1206                         local vfs will do advisory */
1207                         if (vol->file_mode ==
1208                                 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1209                                 vol->file_mode = S_IALLUGO;
1210                 } else if (strnicmp(data, "setuids", 7) == 0) {
1211                         vol->setuids = 1;
1212                 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1213                         vol->setuids = 0;
1214                 } else if (strnicmp(data, "nohard", 6) == 0) {
1215                         vol->retry = 0;
1216                 } else if (strnicmp(data, "nosoft", 6) == 0) {
1217                         vol->retry = 1;
1218                 } else if (strnicmp(data, "nointr", 6) == 0) {
1219                         vol->intr = 0;
1220                 } else if (strnicmp(data, "intr", 4) == 0) {
1221                         vol->intr = 1;
1222                 } else if (strnicmp(data, "serverino", 7) == 0) {
1223                         vol->server_ino = 1;
1224                 } else if (strnicmp(data, "noserverino", 9) == 0) {
1225                         vol->server_ino = 0;
1226                 } else if (strnicmp(data, "cifsacl", 7) == 0) {
1227                         vol->cifs_acl = 1;
1228                 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1229                         vol->cifs_acl = 0;
1230                 } else if (strnicmp(data, "acl", 3) == 0) {
1231                         vol->no_psx_acl = 0;
1232                 } else if (strnicmp(data, "noacl", 5) == 0) {
1233                         vol->no_psx_acl = 1;
1234                 } else if (strnicmp(data, "sign", 4) == 0) {
1235                         vol->secFlg |= CIFSSEC_MUST_SIGN;
1236 /*              } else if (strnicmp(data, "seal",4) == 0) {
1237                         vol->secFlg |= CIFSSEC_MUST_SEAL; */
1238                 } else if (strnicmp(data, "direct", 6) == 0) {
1239                         vol->direct_io = 1;
1240                 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
1241                         vol->direct_io = 1;
1242                 } else if (strnicmp(data, "in6_addr", 8) == 0) {
1243                         if (!value || !*value) {
1244                                 vol->in6_addr = NULL;
1245                         } else if (strnlen(value, 49) == 48) {
1246                                 vol->in6_addr = value;
1247                         } else {
1248                                 printk(KERN_WARNING "CIFS: ip v6 address not "
1249                                                     "48 characters long\n");
1250                                 return 1;
1251                         }
1252                 } else if (strnicmp(data, "noac", 4) == 0) {
1253                         printk(KERN_WARNING "CIFS: Mount option noac not "
1254                                 "supported. Instead set "
1255                                 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1256                 } else
1257                         printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1258                                                 data);
1259         }
1260         if (vol->UNC == NULL) {
1261                 if (devname == NULL) {
1262                         printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1263                                                 "target\n");
1264                         return 1;
1265                 }
1266                 if ((temp_len = strnlen(devname, 300)) < 300) {
1267                         vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1268                         if (vol->UNC == NULL)
1269                                 return 1;
1270                         strcpy(vol->UNC, devname);
1271                         if (strncmp(vol->UNC, "//", 2) == 0) {
1272                                 vol->UNC[0] = '\\';
1273                                 vol->UNC[1] = '\\';
1274                         } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1275                                 printk(KERN_WARNING "CIFS: UNC Path does not "
1276                                                     "begin with // or \\\\ \n");
1277                                 return 1;
1278                         }
1279                 } else {
1280                         printk(KERN_WARNING "CIFS: UNC name too long\n");
1281                         return 1;
1282                 }
1283         }
1284         if (vol->UNCip == NULL)
1285                 vol->UNCip = &vol->UNC[2];
1286
1287         return 0;
1288 }
1289
1290 static struct cifsSesInfo *
1291 cifs_find_tcp_session(struct in_addr *target_ip_addr,
1292                 struct in6_addr *target_ip6_addr,
1293                  char *userName, struct TCP_Server_Info **psrvTcp)
1294 {
1295         struct list_head *tmp;
1296         struct cifsSesInfo *ses;
1297         *psrvTcp = NULL;
1298         read_lock(&GlobalSMBSeslock);
1299
1300         list_for_each(tmp, &GlobalSMBSessionList) {
1301                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
1302                 if (ses->server) {
1303                         if ((target_ip_addr &&
1304                                 (ses->server->addr.sockAddr.sin_addr.s_addr
1305                                   == target_ip_addr->s_addr)) || (target_ip6_addr
1306                                 && memcmp(&ses->server->addr.sockAddr6.sin6_addr,
1307                                         target_ip6_addr, sizeof(*target_ip6_addr)))) {
1308                                 /* BB lock server and tcp session and increment
1309                                       use count here?? */
1310
1311                                 /* found a match on the TCP session */
1312                                 *psrvTcp = ses->server;
1313
1314                                 /* BB check if reconnection needed */
1315                                 if (strncmp
1316                                     (ses->userName, userName,
1317                                      MAX_USERNAME_SIZE) == 0){
1318                                         read_unlock(&GlobalSMBSeslock);
1319                                         /* Found exact match on both TCP and
1320                                            SMB sessions */
1321                                         return ses;
1322                                 }
1323                         }
1324                 }
1325                 /* else tcp and smb sessions need reconnection */
1326         }
1327         read_unlock(&GlobalSMBSeslock);
1328         return NULL;
1329 }
1330
1331 static struct cifsTconInfo *
1332 find_unc(__be32 new_target_ip_addr, char *uncName, char *userName)
1333 {
1334         struct list_head *tmp;
1335         struct cifsTconInfo *tcon;
1336
1337         read_lock(&GlobalSMBSeslock);
1338         list_for_each(tmp, &GlobalTreeConnectionList) {
1339                 cFYI(1, ("Next tcon"));
1340                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
1341                 if (tcon->ses) {
1342                         if (tcon->ses->server) {
1343                                 cFYI(1,
1344                                      ("old ip addr: %x == new ip %x ?",
1345                                       tcon->ses->server->addr.sockAddr.sin_addr.
1346                                       s_addr, new_target_ip_addr));
1347                                 if (tcon->ses->server->addr.sockAddr.sin_addr.
1348                                     s_addr == new_target_ip_addr) {
1349         /* BB lock tcon, server and tcp session and increment use count here? */
1350                                         /* found a match on the TCP session */
1351                                         /* BB check if reconnection needed */
1352                                         cFYI(1,
1353                                               ("IP match, old UNC: %s new: %s",
1354                                               tcon->treeName, uncName));
1355                                         if (strncmp
1356                                             (tcon->treeName, uncName,
1357                                              MAX_TREE_SIZE) == 0) {
1358                                                 cFYI(1,
1359                                                      ("and old usr: %s new: %s",
1360                                                       tcon->treeName, uncName));
1361                                                 if (strncmp
1362                                                     (tcon->ses->userName,
1363                                                      userName,
1364                                                      MAX_USERNAME_SIZE) == 0) {
1365                                                         read_unlock(&GlobalSMBSeslock);
1366                                                         /* matched smb session
1367                                                         (user name */
1368                                                         return tcon;
1369                                                 }
1370                                         }
1371                                 }
1372                         }
1373                 }
1374         }
1375         read_unlock(&GlobalSMBSeslock);
1376         return NULL;
1377 }
1378
1379 int
1380 connect_to_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1381                     const char *old_path, const struct nls_table *nls_codepage,
1382                     int remap)
1383 {
1384         unsigned char *referrals = NULL;
1385         unsigned int num_referrals;
1386         int rc = 0;
1387
1388         rc = get_dfs_path(xid, pSesInfo, old_path, nls_codepage,
1389                         &num_referrals, &referrals, remap);
1390
1391         /* BB Add in code to: if valid refrl, if not ip address contact
1392                 the helper that resolves tcp names, mount to it, try to
1393                 tcon to it unmount it if fail */
1394
1395         kfree(referrals);
1396
1397         return rc;
1398 }
1399
1400 int
1401 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
1402              const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
1403              unsigned char **preferrals, int remap)
1404 {
1405         char *temp_unc;
1406         int rc = 0;
1407
1408         *pnum_referrals = 0;
1409
1410         if (pSesInfo->ipc_tid == 0) {
1411                 temp_unc = kmalloc(2 /* for slashes */ +
1412                         strnlen(pSesInfo->serverName,
1413                                 SERVER_NAME_LEN_WITH_NULL * 2)
1414                                  + 1 + 4 /* slash IPC$ */  + 2,
1415                                 GFP_KERNEL);
1416                 if (temp_unc == NULL)
1417                         return -ENOMEM;
1418                 temp_unc[0] = '\\';
1419                 temp_unc[1] = '\\';
1420                 strcpy(temp_unc + 2, pSesInfo->serverName);
1421                 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1422                 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1423                 cFYI(1,
1424                      ("CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid));
1425                 kfree(temp_unc);
1426         }
1427         if (rc == 0)
1428                 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1429                                      pnum_referrals, nls_codepage, remap);
1430
1431         return rc;
1432 }
1433
1434 /* See RFC1001 section 14 on representation of Netbios names */
1435 static void rfc1002mangle(char *target, char *source, unsigned int length)
1436 {
1437         unsigned int i, j;
1438
1439         for (i = 0, j = 0; i < (length); i++) {
1440                 /* mask a nibble at a time and encode */
1441                 target[j] = 'A' + (0x0F & (source[i] >> 4));
1442                 target[j+1] = 'A' + (0x0F & source[i]);
1443                 j += 2;
1444         }
1445
1446 }
1447
1448
1449 static int
1450 ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
1451              char *netbios_name, char *target_name)
1452 {
1453         int rc = 0;
1454         int connected = 0;
1455         __be16 orig_port = 0;
1456
1457         if (*csocket == NULL) {
1458                 rc = sock_create_kern(PF_INET, SOCK_STREAM,
1459                                       IPPROTO_TCP, csocket);
1460                 if (rc < 0) {
1461                         cERROR(1, ("Error %d creating socket", rc));
1462                         *csocket = NULL;
1463                         return rc;
1464                 } else {
1465                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1466                         cFYI(1, ("Socket created"));
1467                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1468                 }
1469         }
1470
1471         psin_server->sin_family = AF_INET;
1472         if (psin_server->sin_port) { /* user overrode default port */
1473                 rc = (*csocket)->ops->connect(*csocket,
1474                                 (struct sockaddr *) psin_server,
1475                                 sizeof(struct sockaddr_in), 0);
1476                 if (rc >= 0)
1477                         connected = 1;
1478         }
1479
1480         if (!connected) {
1481                 /* save original port so we can retry user specified port
1482                         later if fall back ports fail this time  */
1483                 orig_port = psin_server->sin_port;
1484
1485                 /* do not retry on the same port we just failed on */
1486                 if (psin_server->sin_port != htons(CIFS_PORT)) {
1487                         psin_server->sin_port = htons(CIFS_PORT);
1488
1489                         rc = (*csocket)->ops->connect(*csocket,
1490                                         (struct sockaddr *) psin_server,
1491                                         sizeof(struct sockaddr_in), 0);
1492                         if (rc >= 0)
1493                                 connected = 1;
1494                 }
1495         }
1496         if (!connected) {
1497                 psin_server->sin_port = htons(RFC1001_PORT);
1498                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1499                                               psin_server,
1500                                               sizeof(struct sockaddr_in), 0);
1501                 if (rc >= 0)
1502                         connected = 1;
1503         }
1504
1505         /* give up here - unless we want to retry on different
1506                 protocol families some day */
1507         if (!connected) {
1508                 if (orig_port)
1509                         psin_server->sin_port = orig_port;
1510                 cFYI(1, ("Error %d connecting to server via ipv4", rc));
1511                 sock_release(*csocket);
1512                 *csocket = NULL;
1513                 return rc;
1514         }
1515         /* Eventually check for other socket options to change from
1516                 the default. sock_setsockopt not used because it expects
1517                 user space buffer */
1518          cFYI(1, ("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
1519                  (*csocket)->sk->sk_sndbuf,
1520                  (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
1521         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1522         /* make the bufsizes depend on wsize/rsize and max requests */
1523         if ((*csocket)->sk->sk_sndbuf < (200 * 1024))
1524                 (*csocket)->sk->sk_sndbuf = 200 * 1024;
1525         if ((*csocket)->sk->sk_rcvbuf < (140 * 1024))
1526                 (*csocket)->sk->sk_rcvbuf = 140 * 1024;
1527
1528         /* send RFC1001 sessinit */
1529         if (psin_server->sin_port == htons(RFC1001_PORT)) {
1530                 /* some servers require RFC1001 sessinit before sending
1531                 negprot - BB check reconnection in case where second
1532                 sessinit is sent but no second negprot */
1533                 struct rfc1002_session_packet *ses_init_buf;
1534                 struct smb_hdr *smb_buf;
1535                 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
1536                                        GFP_KERNEL);
1537                 if (ses_init_buf) {
1538                         ses_init_buf->trailer.session_req.called_len = 32;
1539                         if (target_name && (target_name[0] != 0)) {
1540                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1541                                         target_name, 16);
1542                         } else {
1543                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1544                                         DEFAULT_CIFS_CALLED_NAME, 16);
1545                         }
1546
1547                         ses_init_buf->trailer.session_req.calling_len = 32;
1548                         /* calling name ends in null (byte 16) from old smb
1549                         convention. */
1550                         if (netbios_name && (netbios_name[0] != 0)) {
1551                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1552                                         netbios_name, 16);
1553                         } else {
1554                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1555                                         "LINUX_CIFS_CLNT", 16);
1556                         }
1557                         ses_init_buf->trailer.session_req.scope1 = 0;
1558                         ses_init_buf->trailer.session_req.scope2 = 0;
1559                         smb_buf = (struct smb_hdr *)ses_init_buf;
1560                         /* sizeof RFC1002_SESSION_REQUEST with no scope */
1561                         smb_buf->smb_buf_length = 0x81000044;
1562                         rc = smb_send(*csocket, smb_buf, 0x44,
1563                                 (struct sockaddr *)psin_server);
1564                         kfree(ses_init_buf);
1565                         msleep(1); /* RFC1001 layer in at least one server
1566                                       requires very short break before negprot
1567                                       presumably because not expecting negprot
1568                                       to follow so fast.  This is a simple
1569                                       solution that works without
1570                                       complicating the code and causes no
1571                                       significant slowing down on mount
1572                                       for everyone else */
1573                 }
1574                 /* else the negprot may still work without this
1575                 even though malloc failed */
1576
1577         }
1578
1579         return rc;
1580 }
1581
1582 static int
1583 ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
1584 {
1585         int rc = 0;
1586         int connected = 0;
1587         __be16 orig_port = 0;
1588
1589         if (*csocket == NULL) {
1590                 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
1591                                       IPPROTO_TCP, csocket);
1592                 if (rc < 0) {
1593                         cERROR(1, ("Error %d creating ipv6 socket", rc));
1594                         *csocket = NULL;
1595                         return rc;
1596                 } else {
1597                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1598                          cFYI(1, ("ipv6 Socket created"));
1599                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1600                 }
1601         }
1602
1603         psin_server->sin6_family = AF_INET6;
1604
1605         if (psin_server->sin6_port) { /* user overrode default port */
1606                 rc = (*csocket)->ops->connect(*csocket,
1607                                 (struct sockaddr *) psin_server,
1608                                 sizeof(struct sockaddr_in6), 0);
1609                 if (rc >= 0)
1610                         connected = 1;
1611         }
1612
1613         if (!connected) {
1614                 /* save original port so we can retry user specified port
1615                         later if fall back ports fail this time  */
1616
1617                 orig_port = psin_server->sin6_port;
1618                 /* do not retry on the same port we just failed on */
1619                 if (psin_server->sin6_port != htons(CIFS_PORT)) {
1620                         psin_server->sin6_port = htons(CIFS_PORT);
1621
1622                         rc = (*csocket)->ops->connect(*csocket,
1623                                         (struct sockaddr *) psin_server,
1624                                         sizeof(struct sockaddr_in6), 0);
1625                         if (rc >= 0)
1626                                 connected = 1;
1627                 }
1628         }
1629         if (!connected) {
1630                 psin_server->sin6_port = htons(RFC1001_PORT);
1631                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1632                                  psin_server, sizeof(struct sockaddr_in6), 0);
1633                 if (rc >= 0)
1634                         connected = 1;
1635         }
1636
1637         /* give up here - unless we want to retry on different
1638                 protocol families some day */
1639         if (!connected) {
1640                 if (orig_port)
1641                         psin_server->sin6_port = orig_port;
1642                 cFYI(1, ("Error %d connecting to server via ipv6", rc));
1643                 sock_release(*csocket);
1644                 *csocket = NULL;
1645                 return rc;
1646         }
1647         /* Eventually check for other socket options to change from
1648                 the default. sock_setsockopt not used because it expects
1649                 user space buffer */
1650         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1651
1652         return rc;
1653 }
1654
1655 void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
1656                           struct super_block *sb, struct smb_vol *vol_info)
1657 {
1658         /* if we are reconnecting then should we check to see if
1659          * any requested capabilities changed locally e.g. via
1660          * remount but we can not do much about it here
1661          * if they have (even if we could detect it by the following)
1662          * Perhaps we could add a backpointer to array of sb from tcon
1663          * or if we change to make all sb to same share the same
1664          * sb as NFS - then we only have one backpointer to sb.
1665          * What if we wanted to mount the server share twice once with
1666          * and once without posixacls or posix paths? */
1667         __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1668
1669         if (vol_info && vol_info->no_linux_ext) {
1670                 tcon->fsUnixInfo.Capability = 0;
1671                 tcon->unix_ext = 0; /* Unix Extensions disabled */
1672                 cFYI(1, ("Linux protocol extensions disabled"));
1673                 return;
1674         } else if (vol_info)
1675                 tcon->unix_ext = 1; /* Unix Extensions supported */
1676
1677         if (tcon->unix_ext == 0) {
1678                 cFYI(1, ("Unix extensions disabled so not set on reconnect"));
1679                 return;
1680         }
1681
1682         if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
1683                 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1684
1685                 /* check for reconnect case in which we do not
1686                    want to change the mount behavior if we can avoid it */
1687                 if (vol_info == NULL) {
1688                         /* turn off POSIX ACL and PATHNAMES if not set
1689                            originally at mount time */
1690                         if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
1691                                 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1692                         if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0)
1693                                 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1694                 }
1695
1696                 cap &= CIFS_UNIX_CAP_MASK;
1697                 if (vol_info && vol_info->no_psx_acl)
1698                         cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1699                 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
1700                         cFYI(1, ("negotiated posix acl support"));
1701                         if (sb)
1702                                 sb->s_flags |= MS_POSIXACL;
1703                 }
1704
1705                 if (vol_info && vol_info->posix_paths == 0)
1706                         cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1707                 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
1708                         cFYI(1, ("negotiate posix pathnames"));
1709                         if (sb)
1710                                 CIFS_SB(sb)->mnt_cifs_flags |=
1711                                         CIFS_MOUNT_POSIX_PATHS;
1712                 }
1713
1714                 /* We might be setting the path sep back to a different
1715                 form if we are reconnecting and the server switched its
1716                 posix path capability for this share */
1717                 if (sb && (CIFS_SB(sb)->prepathlen > 0))
1718                         CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
1719
1720                 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
1721                         if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
1722                                 CIFS_SB(sb)->rsize = 127 * 1024;
1723 #ifdef CONFIG_CIFS_DEBUG2
1724                                 cFYI(1, ("larger reads not supported by srv"));
1725 #endif
1726                         }
1727                 }
1728
1729
1730                 cFYI(1, ("Negotiate caps 0x%x", (int)cap));
1731 #ifdef CONFIG_CIFS_DEBUG2
1732                 if (cap & CIFS_UNIX_FCNTL_CAP)
1733                         cFYI(1, ("FCNTL cap"));
1734                 if (cap & CIFS_UNIX_EXTATTR_CAP)
1735                         cFYI(1, ("EXTATTR cap"));
1736                 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
1737                         cFYI(1, ("POSIX path cap"));
1738                 if (cap & CIFS_UNIX_XATTR_CAP)
1739                         cFYI(1, ("XATTR cap"));
1740                 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
1741                         cFYI(1, ("POSIX ACL cap"));
1742                 if (cap & CIFS_UNIX_LARGE_READ_CAP)
1743                         cFYI(1, ("very large read cap"));
1744                 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
1745                         cFYI(1, ("very large write cap"));
1746 #endif /* CIFS_DEBUG2 */
1747                 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
1748                         if (vol_info == NULL) {
1749                                 cFYI(1, ("resetting capabilities failed"));
1750                         } else
1751                                 cERROR(1, ("Negotiating Unix capabilities "
1752                                            "with the server failed.  Consider "
1753                                            "mounting with the Unix Extensions\n"
1754                                            "disabled, if problems are found, "
1755                                            "by specifying the nounix mount "
1756                                            "option."));
1757
1758                 }
1759         }
1760 }
1761
1762 int
1763 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
1764            char *mount_data, const char *devname)
1765 {
1766         int rc = 0;
1767         int xid;
1768         int address_type = AF_INET;
1769         struct socket *csocket = NULL;
1770         struct sockaddr_in sin_server;
1771         struct sockaddr_in6 sin_server6;
1772         struct smb_vol volume_info;
1773         struct cifsSesInfo *pSesInfo = NULL;
1774         struct cifsSesInfo *existingCifsSes = NULL;
1775         struct cifsTconInfo *tcon = NULL;
1776         struct TCP_Server_Info *srvTcp = NULL;
1777
1778         xid = GetXid();
1779
1780 /* cFYI(1, ("Entering cifs_mount. Xid: %d with: %s", xid, mount_data)); */
1781
1782         memset(&volume_info, 0, sizeof(struct smb_vol));
1783         if (cifs_parse_mount_options(mount_data, devname, &volume_info)) {
1784                 rc = -EINVAL;
1785                 goto out;
1786         }
1787
1788         if (volume_info.nullauth) {
1789                 cFYI(1, ("null user"));
1790                 volume_info.username = "";
1791         } else if (volume_info.username) {
1792                 /* BB fixme parse for domain name here */
1793                 cFYI(1, ("Username: %s", volume_info.username));
1794         } else {
1795                 cifserror("No username specified");
1796         /* In userspace mount helper we can get user name from alternate
1797            locations such as env variables and files on disk */
1798                 rc = -EINVAL;
1799                 goto out;
1800         }
1801
1802         if (volume_info.UNCip && volume_info.UNC) {
1803                 rc = cifs_inet_pton(AF_INET, volume_info.UNCip,
1804                                     &sin_server.sin_addr.s_addr);
1805
1806                 if (rc <= 0) {
1807                         /* not ipv4 address, try ipv6 */
1808                         rc = cifs_inet_pton(AF_INET6, volume_info.UNCip,
1809                                             &sin_server6.sin6_addr.in6_u);
1810                         if (rc > 0)
1811                                 address_type = AF_INET6;
1812                 } else {
1813                         address_type = AF_INET;
1814                 }
1815
1816                 if (rc <= 0) {
1817                         /* we failed translating address */
1818                         rc = -EINVAL;
1819                         goto out;
1820                 }
1821
1822                 cFYI(1, ("UNC: %s ip: %s", volume_info.UNC, volume_info.UNCip));
1823                 /* success */
1824                 rc = 0;
1825         } else if (volume_info.UNCip) {
1826                 /* BB using ip addr as server name to connect to the
1827                    DFS root below */
1828                 cERROR(1, ("Connecting to DFS root not implemented yet"));
1829                 rc = -EINVAL;
1830                 goto out;
1831         } else /* which servers DFS root would we conect to */ {
1832                 cERROR(1,
1833                        ("CIFS mount error: No UNC path (e.g. -o "
1834                         "unc=//192.168.1.100/public) specified"));
1835                 rc = -EINVAL;
1836                 goto out;
1837         }
1838
1839         /* this is needed for ASCII cp to Unicode converts */
1840         if (volume_info.iocharset == NULL) {
1841                 cifs_sb->local_nls = load_nls_default();
1842         /* load_nls_default can not return null */
1843         } else {
1844                 cifs_sb->local_nls = load_nls(volume_info.iocharset);
1845                 if (cifs_sb->local_nls == NULL) {
1846                         cERROR(1, ("CIFS mount error: iocharset %s not found",
1847                                  volume_info.iocharset));
1848                         rc = -ELIBACC;
1849                         goto out;
1850                 }
1851         }
1852
1853         if (address_type == AF_INET)
1854                 existingCifsSes = cifs_find_tcp_session(&sin_server.sin_addr,
1855                         NULL /* no ipv6 addr */,
1856                         volume_info.username, &srvTcp);
1857         else if (address_type == AF_INET6) {
1858                 cFYI(1, ("looking for ipv6 address"));
1859                 existingCifsSes = cifs_find_tcp_session(NULL /* no ipv4 addr */,
1860                         &sin_server6.sin6_addr,
1861                         volume_info.username, &srvTcp);
1862         } else {
1863                 rc = -EINVAL;
1864                 goto out;
1865         }
1866
1867         if (srvTcp) {
1868                 cFYI(1, ("Existing tcp session with server found"));
1869         } else {        /* create socket */
1870                 if (volume_info.port)
1871                         sin_server.sin_port = htons(volume_info.port);
1872                 else
1873                         sin_server.sin_port = 0;
1874                 if (address_type == AF_INET6) {
1875                         cFYI(1, ("attempting ipv6 connect"));
1876                         /* BB should we allow ipv6 on port 139? */
1877                         /* other OS never observed in Wild doing 139 with v6 */
1878                         rc = ipv6_connect(&sin_server6, &csocket);
1879                 } else
1880                         rc = ipv4_connect(&sin_server, &csocket,
1881                                   volume_info.source_rfc1001_name,
1882                                   volume_info.target_rfc1001_name);
1883                 if (rc < 0) {
1884                         cERROR(1, ("Error connecting to IPv4 socket. "
1885                                    "Aborting operation"));
1886                         if (csocket != NULL)
1887                                 sock_release(csocket);
1888                         goto out;
1889                 }
1890
1891                 srvTcp = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1892                 if (!srvTcp) {
1893                         rc = -ENOMEM;
1894                         sock_release(csocket);
1895                         goto out;
1896                 } else {
1897                         memcpy(&srvTcp->addr.sockAddr, &sin_server,
1898                                 sizeof(struct sockaddr_in));
1899                         atomic_set(&srvTcp->inFlight, 0);
1900                         /* BB Add code for ipv6 case too */
1901                         srvTcp->ssocket = csocket;
1902                         srvTcp->protocolType = IPV4;
1903                         init_waitqueue_head(&srvTcp->response_q);
1904                         init_waitqueue_head(&srvTcp->request_q);
1905                         INIT_LIST_HEAD(&srvTcp->pending_mid_q);
1906                         /* at this point we are the only ones with the pointer
1907                         to the struct since the kernel thread not created yet
1908                         so no need to spinlock this init of tcpStatus */
1909                         srvTcp->tcpStatus = CifsNew;
1910                         init_MUTEX(&srvTcp->tcpSem);
1911                         srvTcp->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, srvTcp, "cifsd");
1912                         if ( IS_ERR(srvTcp->tsk) ) {
1913                                 rc = PTR_ERR(srvTcp->tsk);
1914                                 cERROR(1, ("error %d create cifsd thread", rc));
1915                                 srvTcp->tsk = NULL;
1916                                 sock_release(csocket);
1917                                 goto out;
1918                         }
1919                         wait_for_completion(&cifsd_complete);
1920                         rc = 0;
1921                         memcpy(srvTcp->workstation_RFC1001_name,
1922                                 volume_info.source_rfc1001_name, 16);
1923                         memcpy(srvTcp->server_RFC1001_name,
1924                                 volume_info.target_rfc1001_name, 16);
1925                         srvTcp->sequence_number = 0;
1926                 }
1927         }
1928
1929         if (existingCifsSes) {
1930                 pSesInfo = existingCifsSes;
1931                 cFYI(1, ("Existing smb sess found"));
1932         } else if (!rc) {
1933                 cFYI(1, ("Existing smb sess not found"));
1934                 pSesInfo = sesInfoAlloc();
1935                 if (pSesInfo == NULL)
1936                         rc = -ENOMEM;
1937                 else {
1938                         pSesInfo->server = srvTcp;
1939                         sprintf(pSesInfo->serverName, "%u.%u.%u.%u",
1940                                 NIPQUAD(sin_server.sin_addr.s_addr));
1941                 }
1942
1943                 if (!rc) {
1944                         /* volume_info.password freed at unmount */
1945                         if (volume_info.password) {
1946                                 pSesInfo->password = volume_info.password;
1947                                 /* set to NULL to prevent freeing on exit */
1948                                 volume_info.password = NULL;
1949                         }
1950                         if (volume_info.username)
1951                                 strncpy(pSesInfo->userName,
1952                                         volume_info.username,
1953                                         MAX_USERNAME_SIZE);
1954                         if (volume_info.domainname) {
1955                                 int len = strlen(volume_info.domainname);
1956                                 pSesInfo->domainName =
1957                                         kmalloc(len + 1, GFP_KERNEL);
1958                                 if (pSesInfo->domainName)
1959                                         strcpy(pSesInfo->domainName,
1960                                                 volume_info.domainname);
1961                         }
1962                         pSesInfo->linux_uid = volume_info.linux_uid;
1963                         pSesInfo->overrideSecFlg = volume_info.secFlg;
1964                         down(&pSesInfo->sesSem);
1965                         /* BB FIXME need to pass vol->secFlgs BB */
1966                         rc = cifs_setup_session(xid, pSesInfo,
1967                                                 cifs_sb->local_nls);
1968                         up(&pSesInfo->sesSem);
1969                         if (!rc)
1970                                 atomic_inc(&srvTcp->socketUseCount);
1971                 }
1972         }
1973
1974         /* search for existing tcon to this server share */
1975         if (!rc) {
1976                 if (volume_info.rsize > CIFSMaxBufSize) {
1977                         cERROR(1, ("rsize %d too large, using MaxBufSize",
1978                                 volume_info.rsize));
1979                         cifs_sb->rsize = CIFSMaxBufSize;
1980                 } else if ((volume_info.rsize) &&
1981                                 (volume_info.rsize <= CIFSMaxBufSize))
1982                         cifs_sb->rsize = volume_info.rsize;
1983                 else /* default */
1984                         cifs_sb->rsize = CIFSMaxBufSize;
1985
1986                 if (volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
1987                         cERROR(1, ("wsize %d too large, using 4096 instead",
1988                                   volume_info.wsize));
1989                         cifs_sb->wsize = 4096;
1990                 } else if (volume_info.wsize)
1991                         cifs_sb->wsize = volume_info.wsize;
1992                 else
1993                         cifs_sb->wsize =
1994                                 min_t(const int, PAGEVEC_SIZE * PAGE_CACHE_SIZE,
1995                                         127*1024);
1996                         /* old default of CIFSMaxBufSize was too small now
1997                            that SMB Write2 can send multiple pages in kvec.
1998                            RFC1001 does not describe what happens when frame
1999                            bigger than 128K is sent so use that as max in
2000                            conjunction with 52K kvec constraint on arch with 4K
2001                            page size  */
2002
2003                 if (cifs_sb->rsize < 2048) {
2004                         cifs_sb->rsize = 2048;
2005                         /* Windows ME may prefer this */
2006                         cFYI(1, ("readsize set to minimum: 2048"));
2007                 }
2008                 /* calculate prepath */
2009                 cifs_sb->prepath = volume_info.prepath;
2010                 if (cifs_sb->prepath) {
2011                         cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2012                         cifs_sb->prepath[0] = CIFS_DIR_SEP(cifs_sb);
2013                         volume_info.prepath = NULL;
2014                 } else
2015                         cifs_sb->prepathlen = 0;
2016                 cifs_sb->mnt_uid = volume_info.linux_uid;
2017                 cifs_sb->mnt_gid = volume_info.linux_gid;
2018                 cifs_sb->mnt_file_mode = volume_info.file_mode;
2019                 cifs_sb->mnt_dir_mode = volume_info.dir_mode;
2020                 cFYI(1, ("file mode: 0x%x  dir mode: 0x%x",
2021                         cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode));
2022
2023                 if (volume_info.noperm)
2024                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2025                 if (volume_info.setuids)
2026                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2027                 if (volume_info.server_ino)
2028                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2029                 if (volume_info.remap)
2030                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2031                 if (volume_info.no_xattr)
2032                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2033                 if (volume_info.sfu_emul)
2034                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2035                 if (volume_info.nobrl)
2036                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2037                 if (volume_info.cifs_acl)
2038                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2039                 if (volume_info.override_uid)
2040                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2041                 if (volume_info.override_gid)
2042                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2043                 if (volume_info.direct_io) {
2044                         cFYI(1, ("mounting share using direct i/o"));
2045                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2046                 }
2047
2048                 tcon =
2049                     find_unc(sin_server.sin_addr.s_addr, volume_info.UNC,
2050                              volume_info.username);
2051                 if (tcon) {
2052                         cFYI(1, ("Found match on UNC path"));
2053                         /* we can have only one retry value for a connection
2054                            to a share so for resources mounted more than once
2055                            to the same server share the last value passed in
2056                            for the retry flag is used */
2057                         tcon->retry = volume_info.retry;
2058                         tcon->nocase = volume_info.nocase;
2059                 } else {
2060                         tcon = tconInfoAlloc();
2061                         if (tcon == NULL)
2062                                 rc = -ENOMEM;
2063                         else {
2064                                 /* check for null share name ie connecting to
2065                                  * dfs root */
2066
2067                                 /* BB check if this works for exactly length
2068                                  * three strings */
2069                                 if ((strchr(volume_info.UNC + 3, '\\') == NULL)
2070                                     && (strchr(volume_info.UNC + 3, '/') ==
2071                                         NULL)) {
2072                                         rc = connect_to_dfs_path(xid, pSesInfo,
2073                                                 "", cifs_sb->local_nls,
2074                                                 cifs_sb->mnt_cifs_flags &
2075                                                   CIFS_MOUNT_MAP_SPECIAL_CHR);
2076                                         rc = -ENODEV;
2077                                         goto out;
2078                                 } else {
2079                                         /* BB Do we need to wrap sesSem around
2080                                          * this TCon call and Unix SetFS as
2081                                          * we do on SessSetup and reconnect? */
2082                                         rc = CIFSTCon(xid, pSesInfo,
2083                                                 volume_info.UNC,
2084                                                 tcon, cifs_sb->local_nls);
2085                                         cFYI(1, ("CIFS Tcon rc = %d", rc));
2086                                 }
2087                                 if (!rc) {
2088                                         atomic_inc(&pSesInfo->inUse);
2089                                         tcon->retry = volume_info.retry;
2090                                         tcon->nocase = volume_info.nocase;
2091                                 }
2092                         }
2093                 }
2094         }
2095         if (pSesInfo) {
2096                 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
2097                         sb->s_maxbytes = (u64) 1 << 63;
2098                 } else
2099                         sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
2100         }
2101
2102         /* BB FIXME fix time_gran to be larger for LANMAN sessions */
2103         sb->s_time_gran = 100;
2104
2105 /* on error free sesinfo and tcon struct if needed */
2106         if (rc) {
2107                 /* if session setup failed, use count is zero but
2108                 we still need to free cifsd thread */
2109                 if (atomic_read(&srvTcp->socketUseCount) == 0) {
2110                         spin_lock(&GlobalMid_Lock);
2111                         srvTcp->tcpStatus = CifsExiting;
2112                         spin_unlock(&GlobalMid_Lock);
2113                         if (srvTcp->tsk) {
2114                                 struct task_struct *tsk;
2115                                 /* If we could verify that kthread_stop would
2116                                    always wake up processes blocked in
2117                                    tcp in recv_mesg then we could remove the
2118                                    send_sig call */
2119                                 force_sig(SIGKILL, srvTcp->tsk);
2120                                 tsk = srvTcp->tsk;
2121                                 if (tsk)
2122                                         kthread_stop(tsk);
2123                         }
2124                 }
2125                  /* If find_unc succeeded then rc == 0 so we can not end */
2126                 if (tcon)  /* up accidently freeing someone elses tcon struct */
2127                         tconInfoFree(tcon);
2128                 if (existingCifsSes == NULL) {
2129                         if (pSesInfo) {
2130                                 if ((pSesInfo->server) &&
2131                                     (pSesInfo->status == CifsGood)) {
2132                                         int temp_rc;
2133                                         temp_rc = CIFSSMBLogoff(xid, pSesInfo);
2134                                         /* if the socketUseCount is now zero */
2135                                         if ((temp_rc == -ESHUTDOWN) &&
2136                                             (pSesInfo->server) &&
2137                                             (pSesInfo->server->tsk)) {
2138                                                 struct task_struct *tsk;
2139                                                 force_sig(SIGKILL,
2140                                                         pSesInfo->server->tsk);
2141                                                 tsk = pSesInfo->server->tsk;
2142                                                 if (tsk)
2143                                                         kthread_stop(tsk);
2144                                         }
2145                                 } else {
2146                                         cFYI(1, ("No session or bad tcon"));
2147                                         if ((pSesInfo->server) &&
2148                                             (pSesInfo->server->tsk)) {
2149                                                 struct task_struct *tsk;
2150                                                 force_sig(SIGKILL,
2151                                                         pSesInfo->server->tsk);
2152                                                 tsk = pSesInfo->server->tsk;
2153                                                 if (tsk)
2154                                                         kthread_stop(tsk);
2155                                         }
2156                                 }
2157                                 sesInfoFree(pSesInfo);
2158                                 /* pSesInfo = NULL; */
2159                         }
2160                 }
2161         } else {
2162                 atomic_inc(&tcon->useCount);
2163                 cifs_sb->tcon = tcon;
2164                 tcon->ses = pSesInfo;
2165
2166                 /* do not care if following two calls succeed - informational */
2167                 if (!tcon->ipc) {
2168                         CIFSSMBQFSDeviceInfo(xid, tcon);
2169                         CIFSSMBQFSAttributeInfo(xid, tcon);
2170                 }
2171
2172                 /* tell server which Unix caps we support */
2173                 if (tcon->ses->capabilities & CAP_UNIX)
2174                         /* reset of caps checks mount to see if unix extensions
2175                            disabled for just this mount */
2176                         reset_cifs_unix_caps(xid, tcon, sb, &volume_info);
2177                 else
2178                         tcon->unix_ext = 0; /* server does not support them */
2179
2180                 if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2181                         cifs_sb->rsize = 1024 * 127;
2182 #ifdef CONFIG_CIFS_DEBUG2
2183                         cFYI(1, ("no very large read support, rsize now 127K"));
2184 #endif
2185                 }
2186                 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2187                         cifs_sb->wsize = min(cifs_sb->wsize,
2188                                              (tcon->ses->server->maxBuf -
2189                                               MAX_CIFS_HDR_SIZE));
2190                 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2191                         cifs_sb->rsize = min(cifs_sb->rsize,
2192                                              (tcon->ses->server->maxBuf -
2193                                               MAX_CIFS_HDR_SIZE));
2194         }
2195
2196         /* volume_info.password is freed above when existing session found
2197         (in which case it is not needed anymore) but when new sesion is created
2198         the password ptr is put in the new session structure (in which case the
2199         password will be freed at unmount time) */
2200 out:
2201         /* zero out password before freeing */
2202         if (volume_info.password != NULL) {
2203                 memset(volume_info.password, 0, strlen(volume_info.password));
2204                 kfree(volume_info.password);
2205         }
2206         kfree(volume_info.UNC);
2207         kfree(volume_info.prepath);
2208         FreeXid(xid);
2209         return rc;
2210 }
2211
2212 static int
2213 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2214               char session_key[CIFS_SESS_KEY_SIZE],
2215               const struct nls_table *nls_codepage)
2216 {
2217         struct smb_hdr *smb_buffer;
2218         struct smb_hdr *smb_buffer_response;
2219         SESSION_SETUP_ANDX *pSMB;
2220         SESSION_SETUP_ANDX *pSMBr;
2221         char *bcc_ptr;
2222         char *user;
2223         char *domain;
2224         int rc = 0;
2225         int remaining_words = 0;
2226         int bytes_returned = 0;
2227         int len;
2228         __u32 capabilities;
2229         __u16 count;
2230
2231         cFYI(1, ("In sesssetup"));
2232         if (ses == NULL)
2233                 return -EINVAL;
2234         user = ses->userName;
2235         domain = ses->domainName;
2236         smb_buffer = cifs_buf_get();
2237         if (smb_buffer == NULL) {
2238                 return -ENOMEM;
2239         }
2240         smb_buffer_response = smb_buffer;
2241         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2242
2243         /* send SMBsessionSetup here */
2244         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2245                         NULL /* no tCon exists yet */ , 13 /* wct */ );
2246
2247         smb_buffer->Mid = GetNextMid(ses->server);
2248         pSMB->req_no_secext.AndXCommand = 0xFF;
2249         pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2250         pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2251
2252         if (ses->server->secMode &
2253                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2254                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2255
2256         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2257                 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2258         if (ses->capabilities & CAP_UNICODE) {
2259                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2260                 capabilities |= CAP_UNICODE;
2261         }
2262         if (ses->capabilities & CAP_STATUS32) {
2263                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2264                 capabilities |= CAP_STATUS32;
2265         }
2266         if (ses->capabilities & CAP_DFS) {
2267                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2268                 capabilities |= CAP_DFS;
2269         }
2270         pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2271
2272         pSMB->req_no_secext.CaseInsensitivePasswordLength =
2273                 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2274
2275         pSMB->req_no_secext.CaseSensitivePasswordLength =
2276             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2277         bcc_ptr = pByteArea(smb_buffer);
2278         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2279         bcc_ptr += CIFS_SESS_KEY_SIZE;
2280         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2281         bcc_ptr += CIFS_SESS_KEY_SIZE;
2282
2283         if (ses->capabilities & CAP_UNICODE) {
2284                 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2285                         *bcc_ptr = 0;
2286                         bcc_ptr++;
2287                 }
2288                 if (user == NULL)
2289                         bytes_returned = 0; /* skip null user */
2290                 else
2291                         bytes_returned =
2292                                 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2293                                         nls_codepage);
2294                 /* convert number of 16 bit words to bytes */
2295                 bcc_ptr += 2 * bytes_returned;
2296                 bcc_ptr += 2;   /* trailing null */
2297                 if (domain == NULL)
2298                         bytes_returned =
2299                             cifs_strtoUCS((__le16 *) bcc_ptr,
2300                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2301                 else
2302                         bytes_returned =
2303                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2304                                           nls_codepage);
2305                 bcc_ptr += 2 * bytes_returned;
2306                 bcc_ptr += 2;
2307                 bytes_returned =
2308                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2309                                   32, nls_codepage);
2310                 bcc_ptr += 2 * bytes_returned;
2311                 bytes_returned =
2312                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release,
2313                                   32, nls_codepage);
2314                 bcc_ptr += 2 * bytes_returned;
2315                 bcc_ptr += 2;
2316                 bytes_returned =
2317                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2318                                   64, nls_codepage);
2319                 bcc_ptr += 2 * bytes_returned;
2320                 bcc_ptr += 2;
2321         } else {
2322                 if (user != NULL) {
2323                     strncpy(bcc_ptr, user, 200);
2324                     bcc_ptr += strnlen(user, 200);
2325                 }
2326                 *bcc_ptr = 0;
2327                 bcc_ptr++;
2328                 if (domain == NULL) {
2329                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2330                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2331                 } else {
2332                         strncpy(bcc_ptr, domain, 64);
2333                         bcc_ptr += strnlen(domain, 64);
2334                         *bcc_ptr = 0;
2335                         bcc_ptr++;
2336                 }
2337                 strcpy(bcc_ptr, "Linux version ");
2338                 bcc_ptr += strlen("Linux version ");
2339                 strcpy(bcc_ptr, utsname()->release);
2340                 bcc_ptr += strlen(utsname()->release) + 1;
2341                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2342                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2343         }
2344         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2345         smb_buffer->smb_buf_length += count;
2346         pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2347
2348         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2349                          &bytes_returned, CIFS_LONG_OP);
2350         if (rc) {
2351 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2352         } else if ((smb_buffer_response->WordCount == 3)
2353                    || (smb_buffer_response->WordCount == 4)) {
2354                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2355                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2356                 if (action & GUEST_LOGIN)
2357                         cFYI(1, (" Guest login")); /* BB mark SesInfo struct? */
2358                 ses->Suid = smb_buffer_response->Uid; /* UID left in wire format
2359                                                          (little endian) */
2360                 cFYI(1, ("UID = %d ", ses->Suid));
2361         /* response can have either 3 or 4 word count - Samba sends 3 */
2362                 bcc_ptr = pByteArea(smb_buffer_response);
2363                 if ((pSMBr->resp.hdr.WordCount == 3)
2364                     || ((pSMBr->resp.hdr.WordCount == 4)
2365                         && (blob_len < pSMBr->resp.ByteCount))) {
2366                         if (pSMBr->resp.hdr.WordCount == 4)
2367                                 bcc_ptr += blob_len;
2368
2369                         if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2370                                 if ((long) (bcc_ptr) % 2) {
2371                                         remaining_words =
2372                                             (BCC(smb_buffer_response) - 1) / 2;
2373                                         /* Unicode strings must be word
2374                                            aligned */
2375                                         bcc_ptr++;
2376                                 } else {
2377                                         remaining_words =
2378                                                 BCC(smb_buffer_response) / 2;
2379                                 }
2380                                 len =
2381                                     UniStrnlen((wchar_t *) bcc_ptr,
2382                                                remaining_words - 1);
2383 /* We look for obvious messed up bcc or strings in response so we do not go off
2384    the end since (at least) WIN2K and Windows XP have a major bug in not null
2385    terminating last Unicode string in response  */
2386                                 if (ses->serverOS)
2387                                         kfree(ses->serverOS);
2388                                 ses->serverOS = kzalloc(2 * (len + 1),
2389                                                         GFP_KERNEL);
2390                                 if (ses->serverOS == NULL)
2391                                         goto sesssetup_nomem;
2392                                 cifs_strfromUCS_le(ses->serverOS,
2393                                                    (__le16 *)bcc_ptr,
2394                                                    len, nls_codepage);
2395                                 bcc_ptr += 2 * (len + 1);
2396                                 remaining_words -= len + 1;
2397                                 ses->serverOS[2 * len] = 0;
2398                                 ses->serverOS[1 + (2 * len)] = 0;
2399                                 if (remaining_words > 0) {
2400                                         len = UniStrnlen((wchar_t *)bcc_ptr,
2401                                                          remaining_words-1);
2402                                         kfree(ses->serverNOS);
2403                                         ses->serverNOS = kzalloc(2 * (len + 1),
2404                                                                  GFP_KERNEL);
2405                                         if (ses->serverNOS == NULL)
2406                                                 goto sesssetup_nomem;
2407                                         cifs_strfromUCS_le(ses->serverNOS,
2408                                                            (__le16 *)bcc_ptr,
2409                                                            len, nls_codepage);
2410                                         bcc_ptr += 2 * (len + 1);
2411                                         ses->serverNOS[2 * len] = 0;
2412                                         ses->serverNOS[1 + (2 * len)] = 0;
2413                                         if (strncmp(ses->serverNOS,
2414                                                 "NT LAN Manager 4", 16) == 0) {
2415                                                 cFYI(1, ("NT4 server"));
2416                                                 ses->flags |= CIFS_SES_NT4;
2417                                         }
2418                                         remaining_words -= len + 1;
2419                                         if (remaining_words > 0) {
2420                                                 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2421                                 /* last string is not always null terminated
2422                                    (for e.g. for Windows XP & 2000) */
2423                                                 if (ses->serverDomain)
2424                                                         kfree(ses->serverDomain);
2425                                                 ses->serverDomain =
2426                                                     kzalloc(2*(len+1),
2427                                                             GFP_KERNEL);
2428                                                 if (ses->serverDomain == NULL)
2429                                                         goto sesssetup_nomem;
2430                                                 cifs_strfromUCS_le(ses->serverDomain,
2431                                                         (__le16 *)bcc_ptr,
2432                                                         len, nls_codepage);
2433                                                 bcc_ptr += 2 * (len + 1);
2434                                                 ses->serverDomain[2*len] = 0;
2435                                                 ses->serverDomain[1+(2*len)] = 0;
2436                                         } else { /* else no more room so create
2437                                                   dummy domain string */
2438                                                 if (ses->serverDomain)
2439                                                         kfree(ses->serverDomain);
2440                                                 ses->serverDomain =
2441                                                         kzalloc(2, GFP_KERNEL);
2442                                         }
2443                                 } else { /* no room so create dummy domain
2444                                             and NOS string */
2445
2446                                         /* if these kcallocs fail not much we
2447                                            can do, but better to not fail the
2448                                            sesssetup itself */
2449                                         kfree(ses->serverDomain);
2450                                         ses->serverDomain =
2451                                             kzalloc(2, GFP_KERNEL);
2452                                         kfree(ses->serverNOS);
2453                                         ses->serverNOS =
2454                                             kzalloc(2, GFP_KERNEL);
2455                                 }
2456                         } else {        /* ASCII */
2457                                 len = strnlen(bcc_ptr, 1024);
2458                                 if (((long) bcc_ptr + len) - (long)
2459                                     pByteArea(smb_buffer_response)
2460                                             <= BCC(smb_buffer_response)) {
2461                                         kfree(ses->serverOS);
2462                                         ses->serverOS = kzalloc(len + 1,
2463                                                                 GFP_KERNEL);
2464                                         if (ses->serverOS == NULL)
2465                                                 goto sesssetup_nomem;
2466                                         strncpy(ses->serverOS, bcc_ptr, len);
2467
2468                                         bcc_ptr += len;
2469                                         /* null terminate the string */
2470                                         bcc_ptr[0] = 0;
2471                                         bcc_ptr++;
2472
2473                                         len = strnlen(bcc_ptr, 1024);
2474                                         kfree(ses->serverNOS);
2475                                         ses->serverNOS = kzalloc(len + 1,
2476                                                                  GFP_KERNEL);
2477                                         if (ses->serverNOS == NULL)
2478                                                 goto sesssetup_nomem;
2479                                         strncpy(ses->serverNOS, bcc_ptr, len);
2480                                         bcc_ptr += len;
2481                                         bcc_ptr[0] = 0;
2482                                         bcc_ptr++;
2483
2484                                         len = strnlen(bcc_ptr, 1024);
2485                                         if (ses->serverDomain)
2486                                                 kfree(ses->serverDomain);
2487                                         ses->serverDomain = kzalloc(len + 1,
2488                                                                     GFP_KERNEL);
2489                                         if (ses->serverDomain == NULL)
2490                                                 goto sesssetup_nomem;
2491                                         strncpy(ses->serverDomain, bcc_ptr,
2492                                                 len);
2493                                         bcc_ptr += len;
2494                                         bcc_ptr[0] = 0;
2495                                         bcc_ptr++;
2496                                 } else
2497                                         cFYI(1,
2498                                              ("Variable field of length %d "
2499                                                 "extends beyond end of smb ",
2500                                               len));
2501                         }
2502                 } else {
2503                         cERROR(1,
2504                                (" Security Blob Length extends beyond "
2505                                 "end of SMB"));
2506                 }
2507         } else {
2508                 cERROR(1,
2509                        (" Invalid Word count %d: ",
2510                         smb_buffer_response->WordCount));
2511                 rc = -EIO;
2512         }
2513 sesssetup_nomem:        /* do not return an error on nomem for the info strings,
2514                            since that could make reconnection harder, and
2515                            reconnection might be needed to free memory */
2516         cifs_buf_release(smb_buffer);
2517
2518         return rc;
2519 }
2520
2521 static int
2522 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2523                               struct cifsSesInfo *ses, int *pNTLMv2_flag,
2524                               const struct nls_table *nls_codepage)
2525 {
2526         struct smb_hdr *smb_buffer;
2527         struct smb_hdr *smb_buffer_response;
2528         SESSION_SETUP_ANDX *pSMB;
2529         SESSION_SETUP_ANDX *pSMBr;
2530         char *bcc_ptr;
2531         char *domain;
2532         int rc = 0;
2533         int remaining_words = 0;
2534         int bytes_returned = 0;
2535         int len;
2536         int SecurityBlobLength = sizeof(NEGOTIATE_MESSAGE);
2537         PNEGOTIATE_MESSAGE SecurityBlob;
2538         PCHALLENGE_MESSAGE SecurityBlob2;
2539         __u32 negotiate_flags, capabilities;
2540         __u16 count;
2541
2542         cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
2543         if (ses == NULL)
2544                 return -EINVAL;
2545         domain = ses->domainName;
2546         *pNTLMv2_flag = FALSE;
2547         smb_buffer = cifs_buf_get();
2548         if (smb_buffer == NULL) {
2549                 return -ENOMEM;
2550         }
2551         smb_buffer_response = smb_buffer;
2552         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2553         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2554
2555         /* send SMBsessionSetup here */
2556         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2557                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2558
2559         smb_buffer->Mid = GetNextMid(ses->server);
2560         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2561         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2562
2563         pSMB->req.AndXCommand = 0xFF;
2564         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2565         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2566
2567         if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2568                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2569
2570         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2571             CAP_EXTENDED_SECURITY;
2572         if (ses->capabilities & CAP_UNICODE) {
2573                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2574                 capabilities |= CAP_UNICODE;
2575         }
2576         if (ses->capabilities & CAP_STATUS32) {
2577                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2578                 capabilities |= CAP_STATUS32;
2579         }
2580         if (ses->capabilities & CAP_DFS) {
2581                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2582                 capabilities |= CAP_DFS;
2583         }
2584         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2585
2586         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2587         SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2588         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2589         SecurityBlob->MessageType = NtLmNegotiate;
2590         negotiate_flags =
2591             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2592             NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
2593             NTLMSSP_NEGOTIATE_56 |
2594             /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2595         if (sign_CIFS_PDUs)
2596                 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2597 /*      if (ntlmv2_support)
2598                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;*/
2599         /* setup pointers to domain name and workstation name */
2600         bcc_ptr += SecurityBlobLength;
2601
2602         SecurityBlob->WorkstationName.Buffer = 0;
2603         SecurityBlob->WorkstationName.Length = 0;
2604         SecurityBlob->WorkstationName.MaximumLength = 0;
2605
2606         /* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
2607         along with username on auth request (ie the response to challenge) */
2608         SecurityBlob->DomainName.Buffer = 0;
2609         SecurityBlob->DomainName.Length = 0;
2610         SecurityBlob->DomainName.MaximumLength = 0;
2611         if (ses->capabilities & CAP_UNICODE) {
2612                 if ((long) bcc_ptr % 2) {
2613                         *bcc_ptr = 0;
2614                         bcc_ptr++;
2615                 }
2616
2617                 bytes_returned =
2618                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2619                                   32, nls_codepage);
2620                 bcc_ptr += 2 * bytes_returned;
2621                 bytes_returned =
2622                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
2623                                   nls_codepage);
2624                 bcc_ptr += 2 * bytes_returned;
2625                 bcc_ptr += 2;   /* null terminate Linux version */
2626                 bytes_returned =
2627                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2628                                   64, nls_codepage);
2629                 bcc_ptr += 2 * bytes_returned;
2630                 *(bcc_ptr + 1) = 0;
2631                 *(bcc_ptr + 2) = 0;
2632                 bcc_ptr += 2;   /* null terminate network opsys string */
2633                 *(bcc_ptr + 1) = 0;
2634                 *(bcc_ptr + 2) = 0;
2635                 bcc_ptr += 2;   /* null domain */
2636         } else {                /* ASCII */
2637                 strcpy(bcc_ptr, "Linux version ");
2638                 bcc_ptr += strlen("Linux version ");
2639                 strcpy(bcc_ptr, utsname()->release);
2640                 bcc_ptr += strlen(utsname()->release) + 1;
2641                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2642                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2643                 bcc_ptr++;      /* empty domain field */
2644                 *bcc_ptr = 0;
2645         }
2646         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2647         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2648         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2649         smb_buffer->smb_buf_length += count;
2650         pSMB->req.ByteCount = cpu_to_le16(count);
2651
2652         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2653                          &bytes_returned, CIFS_LONG_OP);
2654
2655         if (smb_buffer_response->Status.CifsError ==
2656             cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
2657                 rc = 0;
2658
2659         if (rc) {
2660 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2661         } else if ((smb_buffer_response->WordCount == 3)
2662                    || (smb_buffer_response->WordCount == 4)) {
2663                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2664                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2665
2666                 if (action & GUEST_LOGIN)
2667                         cFYI(1, (" Guest login"));
2668         /* Do we want to set anything in SesInfo struct when guest login? */
2669
2670                 bcc_ptr = pByteArea(smb_buffer_response);
2671         /* response can have either 3 or 4 word count - Samba sends 3 */
2672
2673                 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
2674                 if (SecurityBlob2->MessageType != NtLmChallenge) {
2675                         cFYI(1,
2676                              ("Unexpected NTLMSSP message type received %d",
2677                               SecurityBlob2->MessageType));
2678                 } else if (ses) {
2679                         ses->Suid = smb_buffer_response->Uid; /* UID left in le format */
2680                         cFYI(1, ("UID = %d", ses->Suid));
2681                         if ((pSMBr->resp.hdr.WordCount == 3)
2682                             || ((pSMBr->resp.hdr.WordCount == 4)
2683                                 && (blob_len <
2684                                     pSMBr->resp.ByteCount))) {
2685
2686                                 if (pSMBr->resp.hdr.WordCount == 4) {
2687                                         bcc_ptr += blob_len;
2688                                         cFYI(1, ("Security Blob Length %d",
2689                                               blob_len));
2690                                 }
2691
2692                                 cFYI(1, ("NTLMSSP Challenge rcvd"));
2693
2694                                 memcpy(ses->server->cryptKey,
2695                                        SecurityBlob2->Challenge,
2696                                        CIFS_CRYPTO_KEY_SIZE);
2697                                 if (SecurityBlob2->NegotiateFlags &
2698                                         cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
2699                                         *pNTLMv2_flag = TRUE;
2700
2701                                 if ((SecurityBlob2->NegotiateFlags &
2702                                         cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN))
2703                                         || (sign_CIFS_PDUs > 1))
2704                                                 ses->server->secMode |=
2705                                                         SECMODE_SIGN_REQUIRED;
2706                                 if ((SecurityBlob2->NegotiateFlags &
2707                                         cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
2708                                                 ses->server->secMode |=
2709                                                         SECMODE_SIGN_ENABLED;
2710
2711                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2712                                         if ((long) (bcc_ptr) % 2) {
2713                                                 remaining_words =
2714                                                     (BCC(smb_buffer_response)
2715                                                      - 1) / 2;
2716                                          /* Must word align unicode strings */
2717                                                 bcc_ptr++;
2718                                         } else {
2719                                                 remaining_words =
2720                                                     BCC
2721                                                     (smb_buffer_response) / 2;
2722                                         }
2723                                         len =
2724                                             UniStrnlen((wchar_t *) bcc_ptr,
2725                                                        remaining_words - 1);
2726 /* We look for obvious messed up bcc or strings in response so we do not go off
2727    the end since (at least) WIN2K and Windows XP have a major bug in not null
2728    terminating last Unicode string in response  */
2729                                         if (ses->serverOS)
2730                                                 kfree(ses->serverOS);
2731                                         ses->serverOS =
2732                                             kzalloc(2 * (len + 1), GFP_KERNEL);
2733                                         cifs_strfromUCS_le(ses->serverOS,
2734                                                            (__le16 *)
2735                                                            bcc_ptr, len,
2736                                                            nls_codepage);
2737                                         bcc_ptr += 2 * (len + 1);
2738                                         remaining_words -= len + 1;
2739                                         ses->serverOS[2 * len] = 0;
2740                                         ses->serverOS[1 + (2 * len)] = 0;
2741                                         if (remaining_words > 0) {
2742                                                 len = UniStrnlen((wchar_t *)
2743                                                                  bcc_ptr,
2744                                                                  remaining_words
2745                                                                  - 1);
2746                                                 kfree(ses->serverNOS);
2747                                                 ses->serverNOS =
2748                                                     kzalloc(2 * (len + 1),
2749                                                             GFP_KERNEL);
2750                                                 cifs_strfromUCS_le(ses->
2751                                                                    serverNOS,
2752                                                                    (__le16 *)
2753                                                                    bcc_ptr,
2754                                                                    len,
2755                                                                    nls_codepage);
2756                                                 bcc_ptr += 2 * (len + 1);
2757                                                 ses->serverNOS[2 * len] = 0;
2758                                                 ses->serverNOS[1 +
2759                                                                (2 * len)] = 0;
2760                                                 remaining_words -= len + 1;
2761                                                 if (remaining_words > 0) {
2762                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2763                                 /* last string not always null terminated
2764                                    (for e.g. for Windows XP & 2000) */
2765                                                         kfree(ses->serverDomain);
2766                                                         ses->serverDomain =
2767                                                             kzalloc(2 *
2768                                                                     (len +
2769                                                                      1),
2770                                                                     GFP_KERNEL);
2771                                                         cifs_strfromUCS_le
2772                                                             (ses->serverDomain,
2773                                                              (__le16 *)bcc_ptr,
2774                                                              len, nls_codepage);
2775                                                         bcc_ptr +=
2776                                                             2 * (len + 1);
2777                                                         ses->serverDomain[2*len]
2778                                                             = 0;
2779                                                         ses->serverDomain
2780                                                                 [1 + (2 * len)]
2781                                                             = 0;
2782                                                 } /* else no more room so create dummy domain string */
2783                                                 else {
2784                                                         kfree(ses->serverDomain);
2785                                                         ses->serverDomain =
2786                                                             kzalloc(2,
2787                                                                     GFP_KERNEL);
2788                                                 }
2789                                         } else {        /* no room so create dummy domain and NOS string */
2790                                                 kfree(ses->serverDomain);
2791                                                 ses->serverDomain =
2792                                                     kzalloc(2, GFP_KERNEL);
2793                                                 kfree(ses->serverNOS);
2794                                                 ses->serverNOS =
2795                                                     kzalloc(2, GFP_KERNEL);
2796                                         }
2797                                 } else {        /* ASCII */
2798                                         len = strnlen(bcc_ptr, 1024);
2799                                         if (((long) bcc_ptr + len) - (long)
2800                                             pByteArea(smb_buffer_response)
2801                                             <= BCC(smb_buffer_response)) {
2802                                                 if (ses->serverOS)
2803                                                         kfree(ses->serverOS);
2804                                                 ses->serverOS =
2805                                                     kzalloc(len + 1,
2806                                                             GFP_KERNEL);
2807                                                 strncpy(ses->serverOS,
2808                                                         bcc_ptr, len);
2809
2810                                                 bcc_ptr += len;
2811                                                 bcc_ptr[0] = 0; /* null terminate string */
2812                                                 bcc_ptr++;
2813
2814                                                 len = strnlen(bcc_ptr, 1024);
2815                                                 kfree(ses->serverNOS);
2816                                                 ses->serverNOS =
2817                                                     kzalloc(len + 1,
2818                                                             GFP_KERNEL);
2819                                                 strncpy(ses->serverNOS, bcc_ptr, len);
2820                                                 bcc_ptr += len;
2821                                                 bcc_ptr[0] = 0;
2822                                                 bcc_ptr++;
2823
2824                                                 len = strnlen(bcc_ptr, 1024);
2825                                                 kfree(ses->serverDomain);
2826                                                 ses->serverDomain =
2827                                                     kzalloc(len + 1,
2828                                                             GFP_KERNEL);
2829                                                 strncpy(ses->serverDomain,
2830                                                         bcc_ptr, len);
2831                                                 bcc_ptr += len;
2832                                                 bcc_ptr[0] = 0;
2833                                                 bcc_ptr++;
2834                                         } else
2835                                                 cFYI(1,
2836                                                      ("field of length %d "
2837                                                     "extends beyond end of smb",
2838                                                       len));
2839                                 }
2840                         } else {
2841                                 cERROR(1, ("Security Blob Length extends beyond"
2842                                            " end of SMB"));
2843                         }
2844                 } else {
2845                         cERROR(1, ("No session structure passed in."));
2846                 }
2847         } else {
2848                 cERROR(1,
2849                        (" Invalid Word count %d:",
2850                         smb_buffer_response->WordCount));
2851                 rc = -EIO;
2852         }
2853
2854         cifs_buf_release(smb_buffer);
2855
2856         return rc;
2857 }
2858 static int
2859 CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2860                         char *ntlm_session_key, int ntlmv2_flag,
2861                         const struct nls_table *nls_codepage)
2862 {
2863         struct smb_hdr *smb_buffer;
2864         struct smb_hdr *smb_buffer_response;
2865         SESSION_SETUP_ANDX *pSMB;
2866         SESSION_SETUP_ANDX *pSMBr;
2867         char *bcc_ptr;
2868         char *user;
2869         char *domain;
2870         int rc = 0;
2871         int remaining_words = 0;
2872         int bytes_returned = 0;
2873         int len;
2874         int SecurityBlobLength = sizeof(AUTHENTICATE_MESSAGE);
2875         PAUTHENTICATE_MESSAGE SecurityBlob;
2876         __u32 negotiate_flags, capabilities;
2877         __u16 count;
2878
2879         cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
2880         if (ses == NULL)
2881                 return -EINVAL;
2882         user = ses->userName;
2883         domain = ses->domainName;
2884         smb_buffer = cifs_buf_get();
2885         if (smb_buffer == NULL) {
2886                 return -ENOMEM;
2887         }
2888         smb_buffer_response = smb_buffer;
2889         pSMB = (SESSION_SETUP_ANDX *)smb_buffer;
2890         pSMBr = (SESSION_SETUP_ANDX *)smb_buffer_response;
2891
2892         /* send SMBsessionSetup here */
2893         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2894                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2895
2896         smb_buffer->Mid = GetNextMid(ses->server);
2897         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2898         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2899         pSMB->req.AndXCommand = 0xFF;
2900         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2901         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2902
2903         pSMB->req.hdr.Uid = ses->Suid;
2904
2905         if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2906                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2907
2908         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2909                         CAP_EXTENDED_SECURITY;
2910         if (ses->capabilities & CAP_UNICODE) {
2911                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2912                 capabilities |= CAP_UNICODE;
2913         }
2914         if (ses->capabilities & CAP_STATUS32) {
2915                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2916                 capabilities |= CAP_STATUS32;
2917         }
2918         if (ses->capabilities & CAP_DFS) {
2919                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2920                 capabilities |= CAP_DFS;
2921         }
2922         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2923
2924         bcc_ptr = (char *)&pSMB->req.SecurityBlob;
2925         SecurityBlob = (PAUTHENTICATE_MESSAGE)bcc_ptr;
2926         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2927         SecurityBlob->MessageType = NtLmAuthenticate;
2928         bcc_ptr += SecurityBlobLength;
2929         negotiate_flags = NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
2930                         NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
2931                         0x80000000 | NTLMSSP_NEGOTIATE_128;
2932         if (sign_CIFS_PDUs)
2933                 negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
2934         if (ntlmv2_flag)
2935                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
2936
2937 /* setup pointers to domain name and workstation name */
2938
2939         SecurityBlob->WorkstationName.Buffer = 0;
2940         SecurityBlob->WorkstationName.Length = 0;
2941         SecurityBlob->WorkstationName.MaximumLength = 0;
2942         SecurityBlob->SessionKey.Length = 0;
2943         SecurityBlob->SessionKey.MaximumLength = 0;
2944         SecurityBlob->SessionKey.Buffer = 0;
2945
2946         SecurityBlob->LmChallengeResponse.Length = 0;
2947         SecurityBlob->LmChallengeResponse.MaximumLength = 0;
2948         SecurityBlob->LmChallengeResponse.Buffer = 0;
2949
2950         SecurityBlob->NtChallengeResponse.Length =
2951             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2952         SecurityBlob->NtChallengeResponse.MaximumLength =
2953             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2954         memcpy(bcc_ptr, ntlm_session_key, CIFS_SESS_KEY_SIZE);
2955         SecurityBlob->NtChallengeResponse.Buffer =
2956             cpu_to_le32(SecurityBlobLength);
2957         SecurityBlobLength += CIFS_SESS_KEY_SIZE;
2958         bcc_ptr += CIFS_SESS_KEY_SIZE;
2959
2960         if (ses->capabilities & CAP_UNICODE) {
2961                 if (domain == NULL) {
2962                         SecurityBlob->DomainName.Buffer = 0;
2963                         SecurityBlob->DomainName.Length = 0;
2964                         SecurityBlob->DomainName.MaximumLength = 0;
2965                 } else {
2966                         __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2967                                           nls_codepage);
2968                         ln *= 2;
2969                         SecurityBlob->DomainName.MaximumLength =
2970                             cpu_to_le16(ln);
2971                         SecurityBlob->DomainName.Buffer =
2972                             cpu_to_le32(SecurityBlobLength);
2973                         bcc_ptr += ln;
2974                         SecurityBlobLength += ln;
2975                         SecurityBlob->DomainName.Length = cpu_to_le16(ln);
2976                 }
2977                 if (user == NULL) {
2978                         SecurityBlob->UserName.Buffer = 0;
2979                         SecurityBlob->UserName.Length = 0;
2980                         SecurityBlob->UserName.MaximumLength = 0;
2981                 } else {
2982                         __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
2983                                           nls_codepage);
2984                         ln *= 2;
2985                         SecurityBlob->UserName.MaximumLength =
2986                             cpu_to_le16(ln);
2987                         SecurityBlob->UserName.Buffer =
2988                             cpu_to_le32(SecurityBlobLength);
2989                         bcc_ptr += ln;
2990                         SecurityBlobLength += ln;
2991                         SecurityBlob->UserName.Length = cpu_to_le16(ln);
2992                 }
2993
2994                 /* SecurityBlob->WorkstationName.Length =
2995                  cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
2996                    SecurityBlob->WorkstationName.Length *= 2;
2997                    SecurityBlob->WorkstationName.MaximumLength =
2998                         cpu_to_le16(SecurityBlob->WorkstationName.Length);
2999                    SecurityBlob->WorkstationName.Buffer =
3000                                  cpu_to_le32(SecurityBlobLength);
3001                    bcc_ptr += SecurityBlob->WorkstationName.Length;
3002                    SecurityBlobLength += SecurityBlob->WorkstationName.Length;
3003                    SecurityBlob->WorkstationName.Length =
3004                         cpu_to_le16(SecurityBlob->WorkstationName.Length);  */
3005
3006                 if ((long) bcc_ptr % 2) {
3007                         *bcc_ptr = 0;
3008                         bcc_ptr++;
3009                 }
3010                 bytes_returned =
3011                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
3012                                   32, nls_codepage);
3013                 bcc_ptr += 2 * bytes_returned;
3014                 bytes_returned =
3015                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
3016                                   nls_codepage);
3017                 bcc_ptr += 2 * bytes_returned;
3018                 bcc_ptr += 2;   /* null term version string */
3019                 bytes_returned =
3020                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
3021                                   64, nls_codepage);
3022                 bcc_ptr += 2 * bytes_returned;
3023                 *(bcc_ptr + 1) = 0;
3024                 *(bcc_ptr + 2) = 0;
3025                 bcc_ptr += 2;   /* null terminate network opsys string */
3026                 *(bcc_ptr + 1) = 0;
3027                 *(bcc_ptr + 2) = 0;
3028                 bcc_ptr += 2;   /* null domain */
3029         } else {                /* ASCII */
3030                 if (domain == NULL) {
3031                         SecurityBlob->DomainName.Buffer = 0;
3032                         SecurityBlob->DomainName.Length = 0;
3033                         SecurityBlob->DomainName.MaximumLength = 0;
3034                 } else {
3035                         __u16 ln;
3036                         negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
3037                         strncpy(bcc_ptr, domain, 63);
3038                         ln = strnlen(domain, 64);
3039                         SecurityBlob->DomainName.MaximumLength =
3040                             cpu_to_le16(ln);
3041                         SecurityBlob->DomainName.Buffer =
3042                             cpu_to_le32(SecurityBlobLength);
3043                         bcc_ptr += ln;
3044                         SecurityBlobLength += ln;
3045                         SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3046                 }
3047                 if (user == NULL) {
3048                         SecurityBlob->UserName.Buffer = 0;
3049                         SecurityBlob->UserName.Length = 0;
3050                         SecurityBlob->UserName.MaximumLength = 0;
3051                 } else {
3052                         __u16 ln;
3053                         strncpy(bcc_ptr, user, 63);
3054                         ln = strnlen(user, 64);
3055                         SecurityBlob->UserName.MaximumLength = cpu_to_le16(ln);
3056                         SecurityBlob->UserName.Buffer =
3057                                                 cpu_to_le32(SecurityBlobLength);
3058                         bcc_ptr += ln;
3059                         SecurityBlobLength += ln;
3060                         SecurityBlob->UserName.Length = cpu_to_le16(ln);
3061                 }
3062                 /* BB fill in our workstation name if known BB */
3063
3064                 strcpy(bcc_ptr, "Linux version ");
3065                 bcc_ptr += strlen("Linux version ");
3066                 strcpy(bcc_ptr, utsname()->release);
3067                 bcc_ptr += strlen(utsname()->release) + 1;
3068                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
3069                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
3070                 bcc_ptr++;      /* null domain */
3071                 *bcc_ptr = 0;
3072         }
3073         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
3074         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
3075         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
3076         smb_buffer->smb_buf_length += count;
3077         pSMB->req.ByteCount = cpu_to_le16(count);
3078
3079         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
3080                          &bytes_returned, CIFS_LONG_OP);
3081         if (rc) {
3082 /*   rc = map_smb_to_linux_error(smb_buffer_response) done in SendReceive now */
3083         } else if ((smb_buffer_response->WordCount == 3) ||
3084                    (smb_buffer_response->WordCount == 4)) {
3085                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
3086                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
3087                 if (action & GUEST_LOGIN)
3088                         cFYI(1, (" Guest login")); /* BB Should we set anything
3089                                                          in SesInfo struct ? */
3090 /*              if (SecurityBlob2->MessageType != NtLm??) {
3091                         cFYI("Unexpected message type on auth response is %d"));
3092                 } */
3093
3094                 if (ses) {
3095                         cFYI(1,
3096                              ("Check challenge UID %d vs auth response UID %d",
3097                               ses->Suid, smb_buffer_response->Uid));
3098                         /* UID left in wire format */
3099                         ses->Suid = smb_buffer_response->Uid;
3100                         bcc_ptr = pByteArea(smb_buffer_response);
3101                 /* response can have either 3 or 4 word count - Samba sends 3 */
3102                         if ((pSMBr->resp.hdr.WordCount == 3)
3103                             || ((pSMBr->resp.hdr.WordCount == 4)
3104                                 && (blob_len <
3105                                     pSMBr->resp.ByteCount))) {
3106                                 if (pSMBr->resp.hdr.WordCount == 4) {
3107                                         bcc_ptr +=
3108                                             blob_len;
3109                                         cFYI(1,
3110                                              ("Security Blob Length %d ",
3111                                               blob_len));
3112                                 }
3113
3114                                 cFYI(1,
3115                                      ("NTLMSSP response to Authenticate "));
3116
3117                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3118                                         if ((long) (bcc_ptr) % 2) {
3119                                                 remaining_words =
3120                                                     (BCC(smb_buffer_response)
3121                                                      - 1) / 2;
3122                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
3123                                         } else {
3124                                                 remaining_words = BCC(smb_buffer_response) / 2;
3125                                         }
3126                                         len = UniStrnlen((wchar_t *) bcc_ptr,
3127                                                         remaining_words - 1);
3128 /* We look for obvious messed up bcc or strings in response so we do not go off
3129   the end since (at least) WIN2K and Windows XP have a major bug in not null
3130   terminating last Unicode string in response  */
3131                                         if (ses->serverOS)
3132                                                 kfree(ses->serverOS);
3133                                         ses->serverOS =
3134                                             kzalloc(2 * (len + 1), GFP_KERNEL);
3135                                         cifs_strfromUCS_le(ses->serverOS,
3136                                                            (__le16 *)
3137                                                            bcc_ptr, len,
3138                                                            nls_codepage);
3139                                         bcc_ptr += 2 * (len + 1);
3140                                         remaining_words -= len + 1;
3141                                         ses->serverOS[2 * len] = 0;
3142                                         ses->serverOS[1 + (2 * len)] = 0;
3143                                         if (remaining_words > 0) {
3144                                                 len = UniStrnlen((wchar_t *)
3145                                                                  bcc_ptr,
3146                                                                  remaining_words
3147                                                                  - 1);
3148                                                 kfree(ses->serverNOS);
3149                                                 ses->serverNOS =
3150                                                     kzalloc(2 * (len + 1),
3151                                                             GFP_KERNEL);
3152                                                 cifs_strfromUCS_le(ses->
3153                                                                    serverNOS,
3154                                                                    (__le16 *)
3155                                                                    bcc_ptr,
3156                                                                    len,
3157                                                                    nls_codepage);
3158                                                 bcc_ptr += 2 * (len + 1);
3159                                                 ses->serverNOS[2 * len] = 0;
3160                                                 ses->serverNOS[1+(2*len)] = 0;
3161                                                 remaining_words -= len + 1;
3162                                                 if (remaining_words > 0) {
3163                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3164      /* last string not always null terminated (e.g. for Windows XP & 2000) */
3165                                                         if (ses->serverDomain)
3166                                                                 kfree(ses->serverDomain);
3167                                                         ses->serverDomain =
3168                                                             kzalloc(2 *
3169                                                                     (len +
3170                                                                      1),
3171                                                                     GFP_KERNEL);
3172                                                         cifs_strfromUCS_le
3173                                                             (ses->
3174                                                              serverDomain,
3175                                                              (__le16 *)
3176                                                              bcc_ptr, len,
3177                                                              nls_codepage);
3178                                                         bcc_ptr +=
3179                                                             2 * (len + 1);
3180                                                         ses->
3181                                                             serverDomain[2
3182                                                                          * len]
3183                                                             = 0;
3184                                                         ses->
3185                                                             serverDomain[1
3186                                                                          +
3187                                                                          (2
3188                                                                           *
3189                                                                           len)]
3190                                                             = 0;
3191                                                 } /* else no more room so create dummy domain string */
3192                                                 else {
3193                                                         if (ses->serverDomain)
3194                                                                 kfree(ses->serverDomain);
3195                                                         ses->serverDomain = kzalloc(2,GFP_KERNEL);
3196                                                 }
3197                                         } else {  /* no room so create dummy domain and NOS string */
3198                                                 if (ses->serverDomain)
3199                                                         kfree(ses->serverDomain);
3200                                                 ses->serverDomain = kzalloc(2, GFP_KERNEL);
3201                                                 kfree(ses->serverNOS);
3202                                                 ses->serverNOS = kzalloc(2, GFP_KERNEL);
3203                                         }
3204                                 } else {        /* ASCII */
3205                                         len = strnlen(bcc_ptr, 1024);
3206                                         if (((long) bcc_ptr + len) -
3207                                            (long) pByteArea(smb_buffer_response)
3208                                                 <= BCC(smb_buffer_response)) {
3209                                                 if (ses->serverOS)
3210                                                         kfree(ses->serverOS);
3211                                                 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
3212                                                 strncpy(ses->serverOS,bcc_ptr, len);
3213
3214                                                 bcc_ptr += len;
3215                                                 bcc_ptr[0] = 0; /* null terminate the string */
3216                                                 bcc_ptr++;
3217
3218                                                 len = strnlen(bcc_ptr, 1024);
3219                                                 kfree(ses->serverNOS);
3220                                                 ses->serverNOS = kzalloc(len+1,
3221                                                                     GFP_KERNEL);
3222                                                 strncpy(ses->serverNOS,
3223                                                         bcc_ptr, len);
3224                                                 bcc_ptr += len;
3225                                                 bcc_ptr[0] = 0;
3226                                                 bcc_ptr++;
3227
3228                                                 len = strnlen(bcc_ptr, 1024);
3229                                                 if (ses->serverDomain)
3230                                                         kfree(ses->serverDomain);
3231                                                 ses->serverDomain =
3232                                                                 kzalloc(len+1,
3233                                                                     GFP_KERNEL);
3234                                                 strncpy(ses->serverDomain,
3235                                                         bcc_ptr, len);
3236                                                 bcc_ptr += len;
3237                                                 bcc_ptr[0] = 0;
3238                                                 bcc_ptr++;
3239                                         } else
3240                                                 cFYI(1, ("field of length %d "
3241                                                    "extends beyond end of smb ",
3242                                                       len));
3243                                 }
3244                         } else {
3245                                 cERROR(1, ("Security Blob extends beyond end "
3246                                         "of SMB"));
3247                         }
3248                 } else {
3249                         cERROR(1, ("No session structure passed in."));
3250                 }
3251         } else {
3252                 cERROR(1, ("Invalid Word count %d: ",
3253                         smb_buffer_response->WordCount));
3254                 rc = -EIO;
3255         }
3256
3257         cifs_buf_release(smb_buffer);
3258
3259         return rc;
3260 }
3261
3262 int
3263 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
3264          const char *tree, struct cifsTconInfo *tcon,
3265          const struct nls_table *nls_codepage)
3266 {
3267         struct smb_hdr *smb_buffer;
3268         struct smb_hdr *smb_buffer_response;
3269         TCONX_REQ *pSMB;
3270         TCONX_RSP *pSMBr;
3271         unsigned char *bcc_ptr;
3272         int rc = 0;
3273         int length;
3274         __u16 count;
3275
3276         if (ses == NULL)
3277                 return -EIO;
3278
3279         smb_buffer = cifs_buf_get();
3280         if (smb_buffer == NULL) {
3281                 return -ENOMEM;
3282         }
3283         smb_buffer_response = smb_buffer;
3284
3285         header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3286                         NULL /*no tid */ , 4 /*wct */ );
3287
3288         smb_buffer->Mid = GetNextMid(ses->server);
3289         smb_buffer->Uid = ses->Suid;
3290         pSMB = (TCONX_REQ *) smb_buffer;
3291         pSMBr = (TCONX_RSP *) smb_buffer_response;
3292
3293         pSMB->AndXCommand = 0xFF;
3294         pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3295         bcc_ptr = &pSMB->Password[0];
3296         if ((ses->server->secMode) & SECMODE_USER) {
3297                 pSMB->PasswordLength = cpu_to_le16(1);  /* minimum */
3298                 *bcc_ptr = 0; /* password is null byte */
3299                 bcc_ptr++;              /* skip password */
3300                 /* already aligned so no need to do it below */
3301         } else {
3302                 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
3303                 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3304                    specified as required (when that support is added to
3305                    the vfs in the future) as only NTLM or the much
3306                    weaker LANMAN (which we do not send by default) is accepted
3307                    by Samba (not sure whether other servers allow
3308                    NTLMv2 password here) */
3309 #ifdef CONFIG_CIFS_WEAK_PW_HASH
3310                 if ((extended_security & CIFSSEC_MAY_LANMAN) &&
3311                         (ses->server->secType == LANMAN))
3312                         calc_lanman_hash(ses, bcc_ptr);
3313                 else
3314 #endif /* CIFS_WEAK_PW_HASH */
3315                 SMBNTencrypt(ses->password,
3316                              ses->server->cryptKey,
3317                              bcc_ptr);
3318
3319                 bcc_ptr += CIFS_SESS_KEY_SIZE;
3320                 if (ses->capabilities & CAP_UNICODE) {
3321                         /* must align unicode strings */
3322                         *bcc_ptr = 0; /* null byte password */
3323                         bcc_ptr++;
3324                 }
3325         }
3326
3327         if (ses->server->secMode &
3328                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3329                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3330
3331         if (ses->capabilities & CAP_STATUS32) {
3332                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3333         }
3334         if (ses->capabilities & CAP_DFS) {
3335                 smb_buffer->Flags2 |= SMBFLG2_DFS;
3336         }
3337         if (ses->capabilities & CAP_UNICODE) {
3338                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3339                 length =
3340                     cifs_strtoUCS((__le16 *) bcc_ptr, tree,
3341                         6 /* max utf8 char length in bytes */ *
3342                         (/* server len*/ + 256 /* share len */), nls_codepage);
3343                 bcc_ptr += 2 * length;  /* convert num 16 bit words to bytes */
3344                 bcc_ptr += 2;   /* skip trailing null */
3345         } else {                /* ASCII */
3346                 strcpy(bcc_ptr, tree);
3347                 bcc_ptr += strlen(tree) + 1;
3348         }
3349         strcpy(bcc_ptr, "?????");
3350         bcc_ptr += strlen("?????");
3351         bcc_ptr += 1;
3352         count = bcc_ptr - &pSMB->Password[0];
3353         pSMB->hdr.smb_buf_length += count;
3354         pSMB->ByteCount = cpu_to_le16(count);
3355
3356         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
3357                          CIFS_STD_OP);
3358
3359         /* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
3360         /* above now done in SendReceive */
3361         if ((rc == 0) && (tcon != NULL)) {
3362                 tcon->tidStatus = CifsGood;
3363                 tcon->tid = smb_buffer_response->Tid;
3364                 bcc_ptr = pByteArea(smb_buffer_response);
3365                 length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
3366                 /* skip service field (NB: this field is always ASCII) */
3367                 if (length == 3) {
3368                         if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3369                             (bcc_ptr[2] == 'C')) {
3370                                 cFYI(1, ("IPC connection"));
3371                                 tcon->ipc = 1;
3372                         }
3373                 } else if (length == 2) {
3374                         if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3375                                 /* the most common case */
3376                                 cFYI(1, ("disk share connection"));
3377                         }
3378                 }
3379                 bcc_ptr += length + 1;
3380                 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3381                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3382                         length = UniStrnlen((wchar_t *) bcc_ptr, 512);
3383                         if ((bcc_ptr + (2 * length)) -
3384                              pByteArea(smb_buffer_response) <=
3385                             BCC(smb_buffer_response)) {
3386                                 kfree(tcon->nativeFileSystem);
3387                                 tcon->nativeFileSystem =
3388                                     kzalloc(length + 2, GFP_KERNEL);
3389                                 if (tcon->nativeFileSystem)
3390                                         cifs_strfromUCS_le(
3391                                                 tcon->nativeFileSystem,
3392                                                 (__le16 *) bcc_ptr,
3393                                                 length, nls_codepage);
3394                                 bcc_ptr += 2 * length;
3395                                 bcc_ptr[0] = 0; /* null terminate the string */
3396                                 bcc_ptr[1] = 0;
3397                                 bcc_ptr += 2;
3398                         }
3399                         /* else do not bother copying these information fields*/
3400                 } else {
3401                         length = strnlen(bcc_ptr, 1024);
3402                         if ((bcc_ptr + length) -
3403                             pByteArea(smb_buffer_response) <=
3404                             BCC(smb_buffer_response)) {
3405                                 kfree(tcon->nativeFileSystem);
3406                                 tcon->nativeFileSystem =
3407                                     kzalloc(length + 1, GFP_KERNEL);
3408                                 if (tcon->nativeFileSystem)
3409                                         strncpy(tcon->nativeFileSystem, bcc_ptr,
3410                                                 length);
3411                         }
3412                         /* else do not bother copying these information fields*/
3413                 }
3414                 if ((smb_buffer_response->WordCount == 3) ||
3415                          (smb_buffer_response->WordCount == 7))
3416                         /* field is in same location */
3417                         tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3418                 else
3419                         tcon->Flags = 0;
3420                 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
3421         } else if ((rc == 0) && tcon == NULL) {
3422                 /* all we need to save for IPC$ connection */
3423                 ses->ipc_tid = smb_buffer_response->Tid;
3424         }
3425
3426         cifs_buf_release(smb_buffer);
3427         return rc;
3428 }
3429
3430 int
3431 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3432 {
3433         int rc = 0;
3434         int xid;
3435         struct cifsSesInfo *ses = NULL;
3436         struct task_struct *cifsd_task;
3437         char *tmp;
3438
3439         xid = GetXid();
3440
3441         if (cifs_sb->tcon) {
3442                 ses = cifs_sb->tcon->ses; /* save ptr to ses before delete tcon!*/
3443                 rc = CIFSSMBTDis(xid, cifs_sb->tcon);
3444                 if (rc == -EBUSY) {
3445                         FreeXid(xid);
3446                         return 0;
3447                 }
3448                 tconInfoFree(cifs_sb->tcon);
3449                 if ((ses) && (ses->server)) {
3450                         /* save off task so we do not refer to ses later */
3451                         cifsd_task = ses->server->tsk;
3452                         cFYI(1, ("About to do SMBLogoff "));
3453                         rc = CIFSSMBLogoff(xid, ses);
3454                         if (rc == -EBUSY) {
3455                                 FreeXid(xid);
3456                                 return 0;
3457                         } else if (rc == -ESHUTDOWN) {
3458                                 cFYI(1, ("Waking up socket by sending signal"));
3459                                 if (cifsd_task) {
3460                                         force_sig(SIGKILL, cifsd_task);
3461                                         kthread_stop(cifsd_task);
3462                                 }
3463                                 rc = 0;
3464                         } /* else - we have an smb session
3465                                 left on this socket do not kill cifsd */
3466                 } else
3467                         cFYI(1, ("No session or bad tcon"));
3468         }
3469
3470         cifs_sb->tcon = NULL;
3471         tmp = cifs_sb->prepath;
3472         cifs_sb->prepathlen = 0;
3473         cifs_sb->prepath = NULL;
3474         kfree(tmp);
3475         if (ses)
3476                 schedule_timeout_interruptible(msecs_to_jiffies(500));
3477         if (ses)
3478                 sesInfoFree(ses);
3479
3480         FreeXid(xid);
3481         return rc;      /* BB check if we should always return zero here */
3482 }
3483
3484 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3485                                            struct nls_table *nls_info)
3486 {
3487         int rc = 0;
3488         char ntlm_session_key[CIFS_SESS_KEY_SIZE];
3489         int ntlmv2_flag = FALSE;
3490         int first_time = 0;
3491
3492         /* what if server changes its buffer size after dropping the session? */
3493         if (pSesInfo->server->maxBuf == 0) /* no need to send on reconnect */ {
3494                 rc = CIFSSMBNegotiate(xid, pSesInfo);
3495                 if (rc == -EAGAIN) /* retry only once on 1st time connection */ {
3496                         rc = CIFSSMBNegotiate(xid, pSesInfo);
3497                         if (rc == -EAGAIN)
3498                                 rc = -EHOSTDOWN;
3499                 }
3500                 if (rc == 0) {
3501                         spin_lock(&GlobalMid_Lock);
3502                         if (pSesInfo->server->tcpStatus != CifsExiting)
3503                                 pSesInfo->server->tcpStatus = CifsGood;
3504                         else
3505                                 rc = -EHOSTDOWN;
3506                         spin_unlock(&GlobalMid_Lock);
3507
3508                 }
3509                 first_time = 1;
3510         }
3511         if (!rc) {
3512                 pSesInfo->flags = 0;
3513                 pSesInfo->capabilities = pSesInfo->server->capabilities;
3514                 if (linuxExtEnabled == 0)
3515                         pSesInfo->capabilities &= (~CAP_UNIX);
3516         /*      pSesInfo->sequence_number = 0;*/
3517                 cFYI(1,
3518                       ("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3519                         pSesInfo->server->secMode,
3520                         pSesInfo->server->capabilities,
3521                         pSesInfo->server->timeAdj));
3522                 if (experimEnabled < 2)
3523                         rc = CIFS_SessSetup(xid, pSesInfo,
3524                                             first_time, nls_info);
3525                 else if (extended_security
3526                                 && (pSesInfo->capabilities
3527                                         & CAP_EXTENDED_SECURITY)
3528                                 && (pSesInfo->server->secType == NTLMSSP)) {
3529                         rc = -EOPNOTSUPP;
3530                 } else if (extended_security
3531                            && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3532                            && (pSesInfo->server->secType == RawNTLMSSP)) {
3533                         cFYI(1, ("NTLMSSP sesssetup"));
3534                         rc = CIFSNTLMSSPNegotiateSessSetup(xid,
3535                                                 pSesInfo,
3536                                                 &ntlmv2_flag,
3537                                                 nls_info);
3538                         if (!rc) {
3539                                 if (ntlmv2_flag) {
3540                                         char *v2_response;
3541                                         cFYI(1, ("more secure NTLM ver2 hash"));
3542                                         if (CalcNTLMv2_partial_mac_key(pSesInfo,
3543                                                 nls_info)) {
3544                                                 rc = -ENOMEM;
3545                                                 goto ss_err_exit;
3546                                         } else
3547                                                 v2_response = kmalloc(16 + 64 /* blob */, GFP_KERNEL);
3548                                         if (v2_response) {
3549                                                 CalcNTLMv2_response(pSesInfo,
3550                                                                    v2_response);
3551                                 /*              if (first_time)
3552                                                   cifs_calculate_ntlmv2_mac_key(
3553                                                    pSesInfo->server->mac_signing_key,
3554                                                    response, ntlm_session_key,*/
3555                                                 kfree(v2_response);
3556                                         /* BB Put dummy sig in SessSetup PDU? */
3557                                         } else {
3558                                                 rc = -ENOMEM;
3559                                                 goto ss_err_exit;
3560                                         }
3561
3562                                 } else {
3563                                         SMBNTencrypt(pSesInfo->password,
3564                                                 pSesInfo->server->cryptKey,
3565                                                 ntlm_session_key);
3566
3567                                         if (first_time)
3568                                                 cifs_calculate_mac_key(
3569                                                         &pSesInfo->server->mac_signing_key,
3570                                                         ntlm_session_key,
3571                                                         pSesInfo->password);
3572                                 }
3573                         /* for better security the weaker lanman hash not sent
3574                            in AuthSessSetup so we no longer calculate it */
3575
3576                                 rc = CIFSNTLMSSPAuthSessSetup(xid,
3577                                         pSesInfo,
3578                                         ntlm_session_key,
3579                                         ntlmv2_flag,
3580                                         nls_info);
3581                         }
3582                 } else { /* old style NTLM 0.12 session setup */
3583                         SMBNTencrypt(pSesInfo->password,
3584                                 pSesInfo->server->cryptKey,
3585                                 ntlm_session_key);
3586
3587                         if (first_time)
3588                                 cifs_calculate_mac_key(
3589                                         &pSesInfo->server->mac_signing_key,
3590                                         ntlm_session_key, pSesInfo->password);
3591
3592                         rc = CIFSSessSetup(xid, pSesInfo,
3593                                 ntlm_session_key, nls_info);
3594                 }
3595                 if (rc) {
3596                         cERROR(1, ("Send error in SessSetup = %d", rc));
3597                 } else {
3598                         cFYI(1, ("CIFS Session Established successfully"));
3599                         pSesInfo->status = CifsGood;
3600                 }
3601         }
3602 ss_err_exit:
3603         return rc;
3604 }
3605