err.no Git - linux-2.6/blob - fs/cifs/connect.c

   1 /*
   2  *   fs/cifs/connect.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2008
   5  *   Author(s): Steve French (sfrench@us.ibm.com)
   6  *
   7  *   This library is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU Lesser General Public License as published
   9  *   by the Free Software Foundation; either version 2.1 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This library is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  15  *   the GNU Lesser General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU Lesser General Public License
  18  *   along with this library; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21 #include <linux/fs.h>
  22 #include <linux/net.h>
  23 #include <linux/string.h>
  24 #include <linux/list.h>
  25 #include <linux/wait.h>
  26 #include <linux/ipv6.h>
  27 #include <linux/pagemap.h>
  28 #include <linux/ctype.h>
  29 #include <linux/utsname.h>
  30 #include <linux/mempool.h>
  31 #include <linux/delay.h>
  32 #include <linux/completion.h>
  33 #include <linux/kthread.h>
  34 #include <linux/pagevec.h>
  35 #include <linux/freezer.h>
  36 #include <asm/uaccess.h>
  37 #include <asm/processor.h>
  38 #include "cifspdu.h"
  39 #include "cifsglob.h"
  40 #include "cifsproto.h"
  41 #include "cifs_unicode.h"
  42 #include "cifs_debug.h"
  43 #include "cifs_fs_sb.h"
  44 #include "ntlmssp.h"
  45 #include "nterr.h"
  46 #include "rfc1002pdu.h"
  47 #include "cn_cifs.h"
  48
  49 #define CIFS_PORT 445
  50 #define RFC1001_PORT 139
  51
  52 static DECLARE_COMPLETION(cifsd_complete);
  53
  54 extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
  55                          unsigned char *p24);
  56
  57 extern mempool_t *cifs_req_poolp;
  58
  59 struct smb_vol {
  60         char *username;
  61         char *password;
  62         char *domainname;
  63         char *UNC;
  64         char *UNCip;
  65         char *in6_addr;  /* ipv6 address as human readable form of in6_addr */
  66         char *iocharset;  /* local code page for mapping to and from Unicode */
  67         char source_rfc1001_name[16]; /* netbios name of client */
  68         char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
  69         uid_t linux_uid;
  70         gid_t linux_gid;
  71         mode_t file_mode;
  72         mode_t dir_mode;
  73         unsigned secFlg;
  74         unsigned rw:1;
  75         unsigned retry:1;
  76         unsigned intr:1;
  77         unsigned setuids:1;
  78         unsigned override_uid:1;
  79         unsigned override_gid:1;
  80         unsigned noperm:1;
  81         unsigned no_psx_acl:1; /* set if posix acl support should be disabled */
  82         unsigned cifs_acl:1;
  83         unsigned no_xattr:1;   /* set if xattr (EA) support should be disabled*/
  84         unsigned server_ino:1; /* use inode numbers from server ie UniqueId */
  85         unsigned direct_io:1;
  86         unsigned remap:1;   /* set to remap seven reserved chars in filenames */
  87         unsigned posix_paths:1;   /* unset to not ask for posix pathnames. */
  88         unsigned no_linux_ext:1;
  89         unsigned sfu_emul:1;
  90         unsigned nullauth:1; /* attempt to authenticate with null user */
  91         unsigned nocase;     /* request case insensitive filenames */
  92         unsigned nobrl;      /* disable sending byte range locks to srv */
  93         unsigned int rsize;
  94         unsigned int wsize;
  95         unsigned int sockopt;
  96         unsigned short int port;
  97         char *prepath;
  98 };
  99
 100 static int ipv4_connect(struct sockaddr_in *psin_server,
 101                         struct socket **csocket,
 102                         char *netb_name,
 103                         char *server_netb_name);
 104 static int ipv6_connect(struct sockaddr_in6 *psin_server,
 105                         struct socket **csocket);
 106
 107
 108         /*
 109          * cifs tcp session reconnection
 110          *
 111          * mark tcp session as reconnecting so temporarily locked
 112          * mark all smb sessions as reconnecting for tcp session
 113          * reconnect tcp session
 114          * wake up waiters on reconnection? - (not needed currently)
 115          */
 116
 117 static int
 118 cifs_reconnect(struct TCP_Server_Info *server)
 119 {
 120         int rc = 0;
 121         struct list_head *tmp;
 122         struct cifsSesInfo *ses;
 123         struct cifsTconInfo *tcon;
 124         struct mid_q_entry *mid_entry;
 125
 126         spin_lock(&GlobalMid_Lock);
 127         if (kthread_should_stop()) {
 128                 /* the demux thread will exit normally
 129                 next time through the loop */
 130                 spin_unlock(&GlobalMid_Lock);
 131                 return rc;
 132         } else
 133                 server->tcpStatus = CifsNeedReconnect;
 134         spin_unlock(&GlobalMid_Lock);
 135         server->maxBuf = 0;
 136
 137         cFYI(1, ("Reconnecting tcp session"));
 138
 139         /* before reconnecting the tcp session, mark the smb session (uid)
 140                 and the tid bad so they are not used until reconnected */
 141         read_lock(&GlobalSMBSeslock);
 142         list_for_each(tmp, &GlobalSMBSessionList) {
 143                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
 144                 if (ses->server) {
 145                         if (ses->server == server) {
 146                                 ses->status = CifsNeedReconnect;
 147                                 ses->ipc_tid = 0;
 148                         }
 149                 }
 150                 /* else tcp and smb sessions need reconnection */
 151         }
 152         list_for_each(tmp, &GlobalTreeConnectionList) {
 153                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
 154                 if ((tcon) && (tcon->ses) && (tcon->ses->server == server))
 155                         tcon->tidStatus = CifsNeedReconnect;
 156         }
 157         read_unlock(&GlobalSMBSeslock);
 158         /* do not want to be sending data on a socket we are freeing */
 159         down(&server->tcpSem);
 160         if (server->ssocket) {
 161                 cFYI(1, ("State: 0x%x Flags: 0x%lx", server->ssocket->state,
 162                         server->ssocket->flags));
 163                 kernel_sock_shutdown(server->ssocket, SHUT_WR);
 164                 cFYI(1, ("Post shutdown state: 0x%x Flags: 0x%lx",
 165                         server->ssocket->state,
 166                         server->ssocket->flags));
 167                 sock_release(server->ssocket);
 168                 server->ssocket = NULL;
 169         }
 170
 171         spin_lock(&GlobalMid_Lock);
 172         list_for_each(tmp, &server->pending_mid_q) {
 173                 mid_entry = list_entry(tmp, struct
 174                                         mid_q_entry,
 175                                         qhead);
 176                 if (mid_entry) {
 177                         if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
 178                                 /* Mark other intransit requests as needing
 179                                    retry so we do not immediately mark the
 180                                    session bad again (ie after we reconnect
 181                                    below) as they timeout too */
 182                                 mid_entry->midState = MID_RETRY_NEEDED;
 183                         }
 184                 }
 185         }
 186         spin_unlock(&GlobalMid_Lock);
 187         up(&server->tcpSem);
 188
 189         while ((!kthread_should_stop()) && (server->tcpStatus != CifsGood)) {
 190                 try_to_freeze();
 191                 if (server->protocolType == IPV6) {
 192                         rc = ipv6_connect(&server->addr.sockAddr6,
 193                                           &server->ssocket);
 194                 } else {
 195                         rc = ipv4_connect(&server->addr.sockAddr,
 196                                         &server->ssocket,
 197                                         server->workstation_RFC1001_name,
 198                                         server->server_RFC1001_name);
 199                 }
 200                 if (rc) {
 201                         cFYI(1, ("reconnect error %d", rc));
 202                         msleep(3000);
 203                 } else {
 204                         atomic_inc(&tcpSesReconnectCount);
 205                         spin_lock(&GlobalMid_Lock);
 206                         if (!kthread_should_stop())
 207                                 server->tcpStatus = CifsGood;
 208                         server->sequence_number = 0;
 209                         spin_unlock(&GlobalMid_Lock);
 210         /*              atomic_set(&server->inFlight,0);*/
 211                         wake_up(&server->response_q);
 212                 }
 213         }
 214         return rc;
 215 }
 216
 217 /*
 218         return codes:
 219                 0       not a transact2, or all data present
 220                 >0      transact2 with that much data missing
 221                 -EINVAL = invalid transact2
 222
 223  */
 224 static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
 225 {
 226         struct smb_t2_rsp *pSMBt;
 227         int total_data_size;
 228         int data_in_this_rsp;
 229         int remaining;
 230
 231         if (pSMB->Command != SMB_COM_TRANSACTION2)
 232                 return 0;
 233
 234         /* check for plausible wct, bcc and t2 data and parm sizes */
 235         /* check for parm and data offset going beyond end of smb */
 236         if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
 237                 cFYI(1, ("invalid transact2 word count"));
 238                 return -EINVAL;
 239         }
 240
 241         pSMBt = (struct smb_t2_rsp *)pSMB;
 242
 243         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 244         data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 245
 246         remaining = total_data_size - data_in_this_rsp;
 247
 248         if (remaining == 0)
 249                 return 0;
 250         else if (remaining < 0) {
 251                 cFYI(1, ("total data %d smaller than data in frame %d",
 252                         total_data_size, data_in_this_rsp));
 253                 return -EINVAL;
 254         } else {
 255                 cFYI(1, ("missing %d bytes from transact2, check next response",
 256                         remaining));
 257                 if (total_data_size > maxBufSize) {
 258                         cERROR(1, ("TotalDataSize %d is over maximum buffer %d",
 259                                 total_data_size, maxBufSize));
 260                         return -EINVAL;
 261                 }
 262                 return remaining;
 263         }
 264 }
 265
 266 static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
 267 {
 268         struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
 269         struct smb_t2_rsp *pSMBt  = (struct smb_t2_rsp *)pTargetSMB;
 270         int total_data_size;
 271         int total_in_buf;
 272         int remaining;
 273         int total_in_buf2;
 274         char *data_area_of_target;
 275         char *data_area_of_buf2;
 276         __u16 byte_count;
 277
 278         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 279
 280         if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
 281                 cFYI(1, ("total data size of primary and secondary t2 differ"));
 282         }
 283
 284         total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 285
 286         remaining = total_data_size - total_in_buf;
 287
 288         if (remaining < 0)
 289                 return -EINVAL;
 290
 291         if (remaining == 0) /* nothing to do, ignore */
 292                 return 0;
 293
 294         total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
 295         if (remaining < total_in_buf2) {
 296                 cFYI(1, ("transact2 2nd response contains too much data"));
 297         }
 298
 299         /* find end of first SMB data area */
 300         data_area_of_target = (char *)&pSMBt->hdr.Protocol +
 301                                 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
 302         /* validate target area */
 303
 304         data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
 305                                         le16_to_cpu(pSMB2->t2_rsp.DataOffset);
 306
 307         data_area_of_target += total_in_buf;
 308
 309         /* copy second buffer into end of first buffer */
 310         memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2);
 311         total_in_buf += total_in_buf2;
 312         pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
 313         byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
 314         byte_count += total_in_buf2;
 315         BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
 316
 317         byte_count = pTargetSMB->smb_buf_length;
 318         byte_count += total_in_buf2;
 319
 320         /* BB also add check that we are not beyond maximum buffer size */
 321
 322         pTargetSMB->smb_buf_length = byte_count;
 323
 324         if (remaining == total_in_buf2) {
 325                 cFYI(1, ("found the last secondary response"));
 326                 return 0; /* we are done */
 327         } else /* more responses to go */
 328                 return 1;
 329
 330 }
 331
 332 static int
 333 cifs_demultiplex_thread(struct TCP_Server_Info *server)
 334 {
 335         int length;
 336         unsigned int pdu_length, total_read;
 337         struct smb_hdr *smb_buffer = NULL;
 338         struct smb_hdr *bigbuf = NULL;
 339         struct smb_hdr *smallbuf = NULL;
 340         struct msghdr smb_msg;
 341         struct kvec iov;
 342         struct socket *csocket = server->ssocket;
 343         struct list_head *tmp;
 344         struct cifsSesInfo *ses;
 345         struct task_struct *task_to_wake = NULL;
 346         struct mid_q_entry *mid_entry;
 347         char temp;
 348         int isLargeBuf = FALSE;
 349         int isMultiRsp;
 350         int reconnect;
 351
 352         current->flags |= PF_MEMALLOC;
 353         server->tsk = current;  /* save process info to wake at shutdown */
 354         cFYI(1, ("Demultiplex PID: %d", task_pid_nr(current)));
 355         write_lock(&GlobalSMBSeslock);
 356         atomic_inc(&tcpSesAllocCount);
 357         length = tcpSesAllocCount.counter;
 358         write_unlock(&GlobalSMBSeslock);
 359         complete(&cifsd_complete);
 360         if (length  > 1)
 361                 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
 362                                 GFP_KERNEL);
 363
 364         set_freezable();
 365         while (!kthread_should_stop()) {
 366                 if (try_to_freeze())
 367                         continue;
 368                 if (bigbuf == NULL) {
 369                         bigbuf = cifs_buf_get();
 370                         if (!bigbuf) {
 371                                 cERROR(1, ("No memory for large SMB response"));
 372                                 msleep(3000);
 373                                 /* retry will check if exiting */
 374                                 continue;
 375                         }
 376                 } else if (isLargeBuf) {
 377                         /* we are reusing a dirty large buf, clear its start */
 378                         memset(bigbuf, 0, sizeof(struct smb_hdr));
 379                 }
 380
 381                 if (smallbuf == NULL) {
 382                         smallbuf = cifs_small_buf_get();
 383                         if (!smallbuf) {
 384                                 cERROR(1, ("No memory for SMB response"));
 385                                 msleep(1000);
 386                                 /* retry will check if exiting */
 387                                 continue;
 388                         }
 389                         /* beginning of smb buffer is cleared in our buf_get */
 390                 } else /* if existing small buf clear beginning */
 391                         memset(smallbuf, 0, sizeof(struct smb_hdr));
 392
 393                 isLargeBuf = FALSE;
 394                 isMultiRsp = FALSE;
 395                 smb_buffer = smallbuf;
 396                 iov.iov_base = smb_buffer;
 397                 iov.iov_len = 4;
 398                 smb_msg.msg_control = NULL;
 399                 smb_msg.msg_controllen = 0;
 400                 pdu_length = 4; /* enough to get RFC1001 header */
 401 incomplete_rcv:
 402                 length =
 403                     kernel_recvmsg(csocket, &smb_msg,
 404                                 &iov, 1, pdu_length, 0 /* BB other flags? */);
 405
 406                 if (kthread_should_stop()) {
 407                         break;
 408                 } else if (server->tcpStatus == CifsNeedReconnect) {
 409                         cFYI(1, ("Reconnect after server stopped responding"));
 410                         cifs_reconnect(server);
 411                         cFYI(1, ("call to reconnect done"));
 412                         csocket = server->ssocket;
 413                         continue;
 414                 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
 415                         msleep(1); /* minimum sleep to prevent looping
 416                                 allowing socket to clear and app threads to set
 417                                 tcpStatus CifsNeedReconnect if server hung */
 418                         if (pdu_length < 4)
 419                                 goto incomplete_rcv;
 420                         else
 421                                 continue;
 422                 } else if (length <= 0) {
 423                         if (server->tcpStatus == CifsNew) {
 424                                 cFYI(1, ("tcp session abend after SMBnegprot"));
 425                                 /* some servers kill the TCP session rather than
 426                                    returning an SMB negprot error, in which
 427                                    case reconnecting here is not going to help,
 428                                    and so simply return error to mount */
 429                                 break;
 430                         }
 431                         if (!try_to_freeze() && (length == -EINTR)) {
 432                                 cFYI(1, ("cifsd thread killed"));
 433                                 break;
 434                         }
 435                         cFYI(1, ("Reconnect after unexpected peek error %d",
 436                                 length));
 437                         cifs_reconnect(server);
 438                         csocket = server->ssocket;
 439                         wake_up(&server->response_q);
 440                         continue;
 441                 } else if (length < pdu_length) {
 442                         cFYI(1, ("requested %d bytes but only got %d bytes",
 443                                   pdu_length, length));
 444                         pdu_length -= length;
 445                         msleep(1);
 446                         goto incomplete_rcv;
 447                 }
 448
 449                 /* The right amount was read from socket - 4 bytes */
 450                 /* so we can now interpret the length field */
 451
 452                 /* the first byte big endian of the length field,
 453                 is actually not part of the length but the type
 454                 with the most common, zero, as regular data */
 455                 temp = *((char *) smb_buffer);
 456
 457                 /* Note that FC 1001 length is big endian on the wire,
 458                 but we convert it here so it is always manipulated
 459                 as host byte order */
 460                 pdu_length = ntohl(smb_buffer->smb_buf_length);
 461                 smb_buffer->smb_buf_length = pdu_length;
 462
 463                 cFYI(1, ("rfc1002 length 0x%x", pdu_length+4));
 464
 465                 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
 466                         continue;
 467                 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
 468                         cFYI(1, ("Good RFC 1002 session rsp"));
 469                         continue;
 470                 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
 471                         /* we get this from Windows 98 instead of
 472                            an error on SMB negprot response */
 473                         cFYI(1, ("Negative RFC1002 Session Response Error 0x%x)",
 474                                 pdu_length));
 475                         if (server->tcpStatus == CifsNew) {
 476                                 /* if nack on negprot (rather than
 477                                 ret of smb negprot error) reconnecting
 478                                 not going to help, ret error to mount */
 479                                 break;
 480                         } else {
 481                                 /* give server a second to
 482                                 clean up before reconnect attempt */
 483                                 msleep(1000);
 484                                 /* always try 445 first on reconnect
 485                                 since we get NACK on some if we ever
 486                                 connected to port 139 (the NACK is
 487                                 since we do not begin with RFC1001
 488                                 session initialize frame) */
 489                                 server->addr.sockAddr.sin_port =
 490                                         htons(CIFS_PORT);
 491                                 cifs_reconnect(server);
 492                                 csocket = server->ssocket;
 493                                 wake_up(&server->response_q);
 494                                 continue;
 495                         }
 496                 } else if (temp != (char) 0) {
 497                         cERROR(1, ("Unknown RFC 1002 frame"));
 498                         cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
 499                                       length);
 500                         cifs_reconnect(server);
 501                         csocket = server->ssocket;
 502                         continue;
 503                 }
 504
 505                 /* else we have an SMB response */
 506                 if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
 507                             (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) {
 508                         cERROR(1, ("Invalid size SMB length %d pdu_length %d",
 509                                         length, pdu_length+4));
 510                         cifs_reconnect(server);
 511                         csocket = server->ssocket;
 512                         wake_up(&server->response_q);
 513                         continue;
 514                 }
 515
 516                 /* else length ok */
 517                 reconnect = 0;
 518
 519                 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
 520                         isLargeBuf = TRUE;
 521                         memcpy(bigbuf, smallbuf, 4);
 522                         smb_buffer = bigbuf;
 523                 }
 524                 length = 0;
 525                 iov.iov_base = 4 + (char *)smb_buffer;
 526                 iov.iov_len = pdu_length;
 527                 for (total_read = 0; total_read < pdu_length;
 528                      total_read += length) {
 529                         length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
 530                                                 pdu_length - total_read, 0);
 531                         if (kthread_should_stop() ||
 532                             (length == -EINTR)) {
 533                                 /* then will exit */
 534                                 reconnect = 2;
 535                                 break;
 536                         } else if (server->tcpStatus == CifsNeedReconnect) {
 537                                 cifs_reconnect(server);
 538                                 csocket = server->ssocket;
 539                                 /* Reconnect wakes up rspns q */
 540                                 /* Now we will reread sock */
 541                                 reconnect = 1;
 542                                 break;
 543                         } else if ((length == -ERESTARTSYS) ||
 544                                    (length == -EAGAIN)) {
 545                                 msleep(1); /* minimum sleep to prevent looping,
 546                                               allowing socket to clear and app
 547                                               threads to set tcpStatus
 548                                               CifsNeedReconnect if server hung*/
 549                                 length = 0;
 550                                 continue;
 551                         } else if (length <= 0) {
 552                                 cERROR(1, ("Received no data, expecting %d",
 553                                               pdu_length - total_read));
 554                                 cifs_reconnect(server);
 555                                 csocket = server->ssocket;
 556                                 reconnect = 1;
 557                                 break;
 558                         }
 559                 }
 560                 if (reconnect == 2)
 561                         break;
 562                 else if (reconnect == 1)
 563                         continue;
 564
 565                 length += 4; /* account for rfc1002 hdr */
 566
 567
 568                 dump_smb(smb_buffer, length);
 569                 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
 570                         cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
 571                         continue;
 572                 }
 573
 574
 575                 task_to_wake = NULL;
 576                 spin_lock(&GlobalMid_Lock);
 577                 list_for_each(tmp, &server->pending_mid_q) {
 578                         mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 579
 580                         if ((mid_entry->mid == smb_buffer->Mid) &&
 581                             (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
 582                             (mid_entry->command == smb_buffer->Command)) {
 583                                 if (check2ndT2(smb_buffer,server->maxBuf) > 0) {
 584                                         /* We have a multipart transact2 resp */
 585                                         isMultiRsp = TRUE;
 586                                         if (mid_entry->resp_buf) {
 587                                                 /* merge response - fix up 1st*/
 588                                                 if (coalesce_t2(smb_buffer,
 589                                                         mid_entry->resp_buf)) {
 590                                                         mid_entry->multiRsp = 1;
 591                                                         break;
 592                                                 } else {
 593                                                         /* all parts received */
 594                                                         mid_entry->multiEnd = 1;
 595                                                         goto multi_t2_fnd;
 596                                                 }
 597                                         } else {
 598                                                 if (!isLargeBuf) {
 599                                                         cERROR(1,("1st trans2 resp needs bigbuf"));
 600                                         /* BB maybe we can fix this up,  switch
 601                                            to already allocated large buffer? */
 602                                                 } else {
 603                                                         /* Have first buffer */
 604                                                         mid_entry->resp_buf =
 605                                                                  smb_buffer;
 606                                                         mid_entry->largeBuf = 1;
 607                                                         bigbuf = NULL;
 608                                                 }
 609                                         }
 610                                         break;
 611                                 }
 612                                 mid_entry->resp_buf = smb_buffer;
 613                                 if (isLargeBuf)
 614                                         mid_entry->largeBuf = 1;
 615                                 else
 616                                         mid_entry->largeBuf = 0;
 617 multi_t2_fnd:
 618                                 task_to_wake = mid_entry->tsk;
 619                                 mid_entry->midState = MID_RESPONSE_RECEIVED;
 620 #ifdef CONFIG_CIFS_STATS2
 621                                 mid_entry->when_received = jiffies;
 622 #endif
 623                                 /* so we do not time out requests to  server
 624                                 which is still responding (since server could
 625                                 be busy but not dead) */
 626                                 server->lstrp = jiffies;
 627                                 break;
 628                         }
 629                 }
 630                 spin_unlock(&GlobalMid_Lock);
 631                 if (task_to_wake) {
 632                         /* Was previous buf put in mpx struct for multi-rsp? */
 633                         if (!isMultiRsp) {
 634                                 /* smb buffer will be freed by user thread */
 635                                 if (isLargeBuf)
 636                                         bigbuf = NULL;
 637                                 else
 638                                         smallbuf = NULL;
 639                         }
 640                         wake_up_process(task_to_wake);
 641                 } else if ((is_valid_oplock_break(smb_buffer, server) == FALSE)
 642                     && (isMultiRsp == FALSE)) {
 643                         cERROR(1, ("No task to wake, unknown frame received! "
 644                                    "NumMids %d", midCount.counter));
 645                         cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
 646                                       sizeof(struct smb_hdr));
 647 #ifdef CONFIG_CIFS_DEBUG2
 648                         cifs_dump_detail(smb_buffer);
 649                         cifs_dump_mids(server);
 650 #endif /* CIFS_DEBUG2 */
 651
 652                 }
 653         } /* end while !EXITING */
 654
 655         spin_lock(&GlobalMid_Lock);
 656         server->tcpStatus = CifsExiting;
 657         server->tsk = NULL;
 658         /* check if we have blocked requests that need to free */
 659         /* Note that cifs_max_pending is normally 50, but
 660         can be set at module install time to as little as two */
 661         if (atomic_read(&server->inFlight) >= cifs_max_pending)
 662                 atomic_set(&server->inFlight, cifs_max_pending - 1);
 663         /* We do not want to set the max_pending too low or we
 664         could end up with the counter going negative */
 665         spin_unlock(&GlobalMid_Lock);
 666         /* Although there should not be any requests blocked on
 667         this queue it can not hurt to be paranoid and try to wake up requests
 668         that may haven been blocked when more than 50 at time were on the wire
 669         to the same server - they now will see the session is in exit state
 670         and get out of SendReceive.  */
 671         wake_up_all(&server->request_q);
 672         /* give those requests time to exit */
 673         msleep(125);
 674
 675         if (server->ssocket) {
 676                 sock_release(csocket);
 677                 server->ssocket = NULL;
 678         }
 679         /* buffer usuallly freed in free_mid - need to free it here on exit */
 680         cifs_buf_release(bigbuf);
 681         if (smallbuf) /* no sense logging a debug message if NULL */
 682                 cifs_small_buf_release(smallbuf);
 683
 684         read_lock(&GlobalSMBSeslock);
 685         if (list_empty(&server->pending_mid_q)) {
 686                 /* loop through server session structures attached to this and
 687                     mark them dead */
 688                 list_for_each(tmp, &GlobalSMBSessionList) {
 689                         ses =
 690                             list_entry(tmp, struct cifsSesInfo,
 691                                        cifsSessionList);
 692                         if (ses->server == server) {
 693                                 ses->status = CifsExiting;
 694                                 ses->server = NULL;
 695                         }
 696                 }
 697                 read_unlock(&GlobalSMBSeslock);
 698         } else {
 699                 /* although we can not zero the server struct pointer yet,
 700                 since there are active requests which may depnd on them,
 701                 mark the corresponding SMB sessions as exiting too */
 702                 list_for_each(tmp, &GlobalSMBSessionList) {
 703                         ses = list_entry(tmp, struct cifsSesInfo,
 704                                          cifsSessionList);
 705                         if (ses->server == server)
 706                                 ses->status = CifsExiting;
 707                 }
 708
 709                 spin_lock(&GlobalMid_Lock);
 710                 list_for_each(tmp, &server->pending_mid_q) {
 711                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 712                         if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
 713                                 cFYI(1, ("Clearing Mid 0x%x - waking up ",
 714                                          mid_entry->mid));
 715                                 task_to_wake = mid_entry->tsk;
 716                                 if (task_to_wake)
 717                                         wake_up_process(task_to_wake);
 718                         }
 719                 }
 720                 spin_unlock(&GlobalMid_Lock);
 721                 read_unlock(&GlobalSMBSeslock);
 722                 /* 1/8th of sec is more than enough time for them to exit */
 723                 msleep(125);
 724         }
 725
 726         if (!list_empty(&server->pending_mid_q)) {
 727                 /* mpx threads have not exited yet give them
 728                 at least the smb send timeout time for long ops */
 729                 /* due to delays on oplock break requests, we need
 730                 to wait at least 45 seconds before giving up
 731                 on a request getting a response and going ahead
 732                 and killing cifsd */
 733                 cFYI(1, ("Wait for exit from demultiplex thread"));
 734                 msleep(46000);
 735                 /* if threads still have not exited they are probably never
 736                 coming home not much else we can do but free the memory */
 737         }
 738
 739         write_lock(&GlobalSMBSeslock);
 740         atomic_dec(&tcpSesAllocCount);
 741         length = tcpSesAllocCount.counter;
 742
 743         /* last chance to mark ses pointers invalid
 744         if there are any pointing to this (e.g
 745         if a crazy root user tried to kill cifsd
 746         kernel thread explicitly this might happen) */
 747         list_for_each(tmp, &GlobalSMBSessionList) {
 748                 ses = list_entry(tmp, struct cifsSesInfo,
 749                                 cifsSessionList);
 750                 if (ses->server == server)
 751                         ses->server = NULL;
 752         }
 753         write_unlock(&GlobalSMBSeslock);
 754
 755         kfree(server->hostname);
 756         kfree(server);
 757         if (length  > 0)
 758                 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
 759                                 GFP_KERNEL);
 760
 761         return 0;
 762 }
 763
 764 /* extract the host portion of the UNC string */
 765 static char *
 766 extract_hostname(const char *unc)
 767 {
 768         const char *src;
 769         char *dst, *delim;
 770         unsigned int len;
 771
 772         /* skip double chars at beginning of string */
 773         /* BB: check validity of these bytes? */
 774         src = unc + 2;
 775
 776         /* delimiter between hostname and sharename is always '\\' now */
 777         delim = strchr(src, '\\');
 778         if (!delim)
 779                 return ERR_PTR(-EINVAL);
 780
 781         len = delim - src;
 782         dst = kmalloc((len + 1), GFP_KERNEL);
 783         if (dst == NULL)
 784                 return ERR_PTR(-ENOMEM);
 785
 786         memcpy(dst, src, len);
 787         dst[len] = '\0';
 788
 789         return dst;
 790 }
 791
 792 static int
 793 cifs_parse_mount_options(char *options, const char *devname,
 794                          struct smb_vol *vol)
 795 {
 796         char *value;
 797         char *data;
 798         unsigned int  temp_len, i, j;
 799         char separator[2];
 800
 801         separator[0] = ',';
 802         separator[1] = 0;
 803
 804         if (Local_System_Name[0] != 0)
 805                 memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
 806         else {
 807                 char *nodename = utsname()->nodename;
 808                 int n = strnlen(nodename, 15);
 809                 memset(vol->source_rfc1001_name, 0x20, 15);
 810                 for (i = 0; i < n; i++) {
 811                         /* does not have to be perfect mapping since field is
 812                         informational, only used for servers that do not support
 813                         port 445 and it can be overridden at mount time */
 814                         vol->source_rfc1001_name[i] = toupper(nodename[i]);
 815                 }
 816         }
 817         vol->source_rfc1001_name[15] = 0;
 818         /* null target name indicates to use *SMBSERVR default called name
 819            if we end up sending RFC1001 session initialize */
 820         vol->target_rfc1001_name[0] = 0;
 821         vol->linux_uid = current->uid;  /* current->euid instead? */
 822         vol->linux_gid = current->gid;
 823         vol->dir_mode = S_IRWXUGO;
 824         /* 2767 perms indicate mandatory locking support */
 825         vol->file_mode = (S_IRWXUGO | S_ISGID) & (~S_IXGRP);
 826
 827         /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
 828         vol->rw = TRUE;
 829         /* default is always to request posix paths. */
 830         vol->posix_paths = 1;
 831
 832         if (!options)
 833                 return 1;
 834
 835         if (strncmp(options, "sep=", 4) == 0) {
 836                 if (options[4] != 0) {
 837                         separator[0] = options[4];
 838                         options += 5;
 839                 } else {
 840                         cFYI(1, ("Null separator not allowed"));
 841                 }
 842         }
 843
 844         while ((data = strsep(&options, separator)) != NULL) {
 845                 if (!*data)
 846                         continue;
 847                 if ((value = strchr(data, '=')) != NULL)
 848                         *value++ = '\0';
 849
 850                 /* Have to parse this before we parse for "user" */
 851                 if (strnicmp(data, "user_xattr", 10) == 0) {
 852                         vol->no_xattr = 0;
 853                 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
 854                         vol->no_xattr = 1;
 855                 } else if (strnicmp(data, "user", 4) == 0) {
 856                         if (!value) {
 857                                 printk(KERN_WARNING
 858                                        "CIFS: invalid or missing username\n");
 859                                 return 1;       /* needs_arg; */
 860                         } else if (!*value) {
 861                                 /* null user, ie anonymous, authentication */
 862                                 vol->nullauth = 1;
 863                         }
 864                         if (strnlen(value, 200) < 200) {
 865                                 vol->username = value;
 866                         } else {
 867                                 printk(KERN_WARNING "CIFS: username too long\n");
 868                                 return 1;
 869                         }
 870                 } else if (strnicmp(data, "pass", 4) == 0) {
 871                         if (!value) {
 872                                 vol->password = NULL;
 873                                 continue;
 874                         } else if (value[0] == 0) {
 875                                 /* check if string begins with double comma
 876                                    since that would mean the password really
 877                                    does start with a comma, and would not
 878                                    indicate an empty string */
 879                                 if (value[1] != separator[0]) {
 880                                         vol->password = NULL;
 881                                         continue;
 882                                 }
 883                         }
 884                         temp_len = strlen(value);
 885                         /* removed password length check, NTLM passwords
 886                                 can be arbitrarily long */
 887
 888                         /* if comma in password, the string will be
 889                         prematurely null terminated.  Commas in password are
 890                         specified across the cifs mount interface by a double
 891                         comma ie ,, and a comma used as in other cases ie ','
 892                         as a parameter delimiter/separator is single and due
 893                         to the strsep above is temporarily zeroed. */
 894
 895                         /* NB: password legally can have multiple commas and
 896                         the only illegal character in a password is null */
 897
 898                         if ((value[temp_len] == 0) &&
 899                             (value[temp_len+1] == separator[0])) {
 900                                 /* reinsert comma */
 901                                 value[temp_len] = separator[0];
 902                                 temp_len += 2;  /* move after second comma */
 903                                 while (value[temp_len] != 0)  {
 904                                         if (value[temp_len] == separator[0]) {
 905                                                 if (value[temp_len+1] ==
 906                                                      separator[0]) {
 907                                                 /* skip second comma */
 908                                                         temp_len++;
 909                                                 } else {
 910                                                 /* single comma indicating start
 911                                                          of next parm */
 912                                                         break;
 913                                                 }
 914                                         }
 915                                         temp_len++;
 916                                 }
 917                                 if (value[temp_len] == 0) {
 918                                         options = NULL;
 919                                 } else {
 920                                         value[temp_len] = 0;
 921                                         /* point option to start of next parm */
 922                                         options = value + temp_len + 1;
 923                                 }
 924                                 /* go from value to value + temp_len condensing
 925                                 double commas to singles. Note that this ends up
 926                                 allocating a few bytes too many, which is ok */
 927                                 vol->password = kzalloc(temp_len, GFP_KERNEL);
 928                                 if (vol->password == NULL) {
 929                                         printk(KERN_WARNING "CIFS: no memory "
 930                                                             "for password\n");
 931                                         return 1;
 932                                 }
 933                                 for (i = 0, j = 0; i < temp_len; i++, j++) {
 934                                         vol->password[j] = value[i];
 935                                         if (value[i] == separator[0]
 936                                                 && value[i+1] == separator[0]) {
 937                                                 /* skip second comma */
 938                                                 i++;
 939                                         }
 940                                 }
 941                                 vol->password[j] = 0;
 942                         } else {
 943                                 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
 944                                 if (vol->password == NULL) {
 945                                         printk(KERN_WARNING "CIFS: no memory "
 946                                                             "for password\n");
 947                                         return 1;
 948                                 }
 949                                 strcpy(vol->password, value);
 950                         }
 951                 } else if (strnicmp(data, "ip", 2) == 0) {
 952                         if (!value || !*value) {
 953                                 vol->UNCip = NULL;
 954                         } else if (strnlen(value, 35) < 35) {
 955                                 vol->UNCip = value;
 956                         } else {
 957                                 printk(KERN_WARNING "CIFS: ip address "
 958                                                     "too long\n");
 959                                 return 1;
 960                         }
 961                 } else if (strnicmp(data, "sec", 3) == 0) {
 962                         if (!value || !*value) {
 963                                 cERROR(1, ("no security value specified"));
 964                                 continue;
 965                         } else if (strnicmp(value, "krb5i", 5) == 0) {
 966                                 vol->secFlg |= CIFSSEC_MAY_KRB5 |
 967                                         CIFSSEC_MUST_SIGN;
 968                         } else if (strnicmp(value, "krb5p", 5) == 0) {
 969                                 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
 970                                         CIFSSEC_MAY_KRB5; */
 971                                 cERROR(1, ("Krb5 cifs privacy not supported"));
 972                                 return 1;
 973                         } else if (strnicmp(value, "krb5", 4) == 0) {
 974                                 vol->secFlg |= CIFSSEC_MAY_KRB5;
 975                         } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
 976                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
 977                                         CIFSSEC_MUST_SIGN;
 978                         } else if (strnicmp(value, "ntlmv2", 6) == 0) {
 979                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
 980                         } else if (strnicmp(value, "ntlmi", 5) == 0) {
 981                                 vol->secFlg |= CIFSSEC_MAY_NTLM |
 982                                         CIFSSEC_MUST_SIGN;
 983                         } else if (strnicmp(value, "ntlm", 4) == 0) {
 984                                 /* ntlm is default so can be turned off too */
 985                                 vol->secFlg |= CIFSSEC_MAY_NTLM;
 986                         } else if (strnicmp(value, "nontlm", 6) == 0) {
 987                                 /* BB is there a better way to do this? */
 988                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
 989 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 990                         } else if (strnicmp(value, "lanman", 6) == 0) {
 991                                 vol->secFlg |= CIFSSEC_MAY_LANMAN;
 992 #endif
 993                         } else if (strnicmp(value, "none", 4) == 0) {
 994                                 vol->nullauth = 1;
 995                         } else {
 996                                 cERROR(1, ("bad security option: %s", value));
 997                                 return 1;
 998                         }
 999                 } else if ((strnicmp(data, "unc", 3) == 0)
1000                            || (strnicmp(data, "target", 6) == 0)
1001                            || (strnicmp(data, "path", 4) == 0)) {
1002                         if (!value || !*value) {
1003                                 printk(KERN_WARNING "CIFS: invalid path to "
1004                                                     "network resource\n");
1005                                 return 1;       /* needs_arg; */
1006                         }
1007                         if ((temp_len = strnlen(value, 300)) < 300) {
1008                                 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1009                                 if (vol->UNC == NULL)
1010                                         return 1;
1011                                 strcpy(vol->UNC, value);
1012                                 if (strncmp(vol->UNC, "//", 2) == 0) {
1013                                         vol->UNC[0] = '\\';
1014                                         vol->UNC[1] = '\\';
1015                                 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1016                                         printk(KERN_WARNING
1017                                                "CIFS: UNC Path does not begin "
1018                                                "with // or \\\\ \n");
1019                                         return 1;
1020                                 }
1021                         } else {
1022                                 printk(KERN_WARNING "CIFS: UNC name too long\n");
1023                                 return 1;
1024                         }
1025                 } else if ((strnicmp(data, "domain", 3) == 0)
1026                            || (strnicmp(data, "workgroup", 5) == 0)) {
1027                         if (!value || !*value) {
1028                                 printk(KERN_WARNING "CIFS: invalid domain name\n");
1029                                 return 1;       /* needs_arg; */
1030                         }
1031                         /* BB are there cases in which a comma can be valid in
1032                         a domain name and need special handling? */
1033                         if (strnlen(value, 256) < 256) {
1034                                 vol->domainname = value;
1035                                 cFYI(1, ("Domain name set"));
1036                         } else {
1037                                 printk(KERN_WARNING "CIFS: domain name too "
1038                                                     "long\n");
1039                                 return 1;
1040                         }
1041                 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1042                         if (!value || !*value) {
1043                                 printk(KERN_WARNING
1044                                         "CIFS: invalid path prefix\n");
1045                                 return 1;       /* needs_argument */
1046                         }
1047                         if ((temp_len = strnlen(value, 1024)) < 1024) {
1048                                 if (value[0] != '/')
1049                                         temp_len++;  /* missing leading slash */
1050                                 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1051                                 if (vol->prepath == NULL)
1052                                         return 1;
1053                                 if (value[0] != '/') {
1054                                         vol->prepath[0] = '/';
1055                                         strcpy(vol->prepath+1, value);
1056                                 } else
1057                                         strcpy(vol->prepath, value);
1058                                 cFYI(1, ("prefix path %s", vol->prepath));
1059                         } else {
1060                                 printk(KERN_WARNING "CIFS: prefix too long\n");
1061                                 return 1;
1062                         }
1063                 } else if (strnicmp(data, "iocharset", 9) == 0) {
1064                         if (!value || !*value) {
1065                                 printk(KERN_WARNING "CIFS: invalid iocharset "
1066                                                     "specified\n");
1067                                 return 1;       /* needs_arg; */
1068                         }
1069                         if (strnlen(value, 65) < 65) {
1070                                 if (strnicmp(value, "default", 7))
1071                                         vol->iocharset = value;
1072                                 /* if iocharset not set then load_nls_default
1073                                    is used by caller */
1074                                 cFYI(1, ("iocharset set to %s", value));
1075                         } else {
1076                                 printk(KERN_WARNING "CIFS: iocharset name "
1077                                                     "too long.\n");
1078                                 return 1;
1079                         }
1080                 } else if (strnicmp(data, "uid", 3) == 0) {
1081                         if (value && *value) {
1082                                 vol->linux_uid =
1083                                         simple_strtoul(value, &value, 0);
1084                                 vol->override_uid = 1;
1085                         }
1086                 } else if (strnicmp(data, "gid", 3) == 0) {
1087                         if (value && *value) {
1088                                 vol->linux_gid =
1089                                         simple_strtoul(value, &value, 0);
1090                                 vol->override_gid = 1;
1091                         }
1092                 } else if (strnicmp(data, "file_mode", 4) == 0) {
1093                         if (value && *value) {
1094                                 vol->file_mode =
1095                                         simple_strtoul(value, &value, 0);
1096                         }
1097                 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1098                         if (value && *value) {
1099                                 vol->dir_mode =
1100                                         simple_strtoul(value, &value, 0);
1101                         }
1102                 } else if (strnicmp(data, "dirmode", 4) == 0) {
1103                         if (value && *value) {
1104                                 vol->dir_mode =
1105                                         simple_strtoul(value, &value, 0);
1106                         }
1107                 } else if (strnicmp(data, "port", 4) == 0) {
1108                         if (value && *value) {
1109                                 vol->port =
1110                                         simple_strtoul(value, &value, 0);
1111                         }
1112                 } else if (strnicmp(data, "rsize", 5) == 0) {
1113                         if (value && *value) {
1114                                 vol->rsize =
1115                                         simple_strtoul(value, &value, 0);
1116                         }
1117                 } else if (strnicmp(data, "wsize", 5) == 0) {
1118                         if (value && *value) {
1119                                 vol->wsize =
1120                                         simple_strtoul(value, &value, 0);
1121                         }
1122                 } else if (strnicmp(data, "sockopt", 5) == 0) {
1123                         if (value && *value) {
1124                                 vol->sockopt =
1125                                         simple_strtoul(value, &value, 0);
1126                         }
1127                 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1128                         if (!value || !*value || (*value == ' ')) {
1129                                 cFYI(1, ("invalid (empty) netbiosname"));
1130                         } else {
1131                                 memset(vol->source_rfc1001_name, 0x20, 15);
1132                                 for (i = 0; i < 15; i++) {
1133                                 /* BB are there cases in which a comma can be
1134                                 valid in this workstation netbios name (and need
1135                                 special handling)? */
1136
1137                                 /* We do not uppercase netbiosname for user */
1138                                         if (value[i] == 0)
1139                                                 break;
1140                                         else
1141                                                 vol->source_rfc1001_name[i] =
1142                                                                 value[i];
1143                                 }
1144                                 /* The string has 16th byte zero still from
1145                                 set at top of the function  */
1146                                 if ((i == 15) && (value[i] != 0))
1147                                         printk(KERN_WARNING "CIFS: netbiosname"
1148                                                 " longer than 15 truncated.\n");
1149                         }
1150                 } else if (strnicmp(data, "servern", 7) == 0) {
1151                         /* servernetbiosname specified override *SMBSERVER */
1152                         if (!value || !*value || (*value == ' ')) {
1153                                 cFYI(1, ("empty server netbiosname specified"));
1154                         } else {
1155                                 /* last byte, type, is 0x20 for servr type */
1156                                 memset(vol->target_rfc1001_name, 0x20, 16);
1157
1158                                 for (i = 0; i < 15; i++) {
1159                                 /* BB are there cases in which a comma can be
1160                                    valid in this workstation netbios name
1161                                    (and need special handling)? */
1162
1163                                 /* user or mount helper must uppercase
1164                                    the netbiosname */
1165                                         if (value[i] == 0)
1166                                                 break;
1167                                         else
1168                                                 vol->target_rfc1001_name[i] =
1169                                                                 value[i];
1170                                 }
1171                                 /* The string has 16th byte zero still from
1172                                    set at top of the function  */
1173                                 if ((i == 15) && (value[i] != 0))
1174                                         printk(KERN_WARNING "CIFS: server net"
1175                                         "biosname longer than 15 truncated.\n");
1176                         }
1177                 } else if (strnicmp(data, "credentials", 4) == 0) {
1178                         /* ignore */
1179                 } else if (strnicmp(data, "version", 3) == 0) {
1180                         /* ignore */
1181                 } else if (strnicmp(data, "guest", 5) == 0) {
1182                         /* ignore */
1183                 } else if (strnicmp(data, "rw", 2) == 0) {
1184                         vol->rw = TRUE;
1185                 } else if ((strnicmp(data, "suid", 4) == 0) ||
1186                                    (strnicmp(data, "nosuid", 6) == 0) ||
1187                                    (strnicmp(data, "exec", 4) == 0) ||
1188                                    (strnicmp(data, "noexec", 6) == 0) ||
1189                                    (strnicmp(data, "nodev", 5) == 0) ||
1190                                    (strnicmp(data, "noauto", 6) == 0) ||
1191                                    (strnicmp(data, "dev", 3) == 0)) {
1192                         /*  The mount tool or mount.cifs helper (if present)
1193                             uses these opts to set flags, and the flags are read
1194                             by the kernel vfs layer before we get here (ie
1195                             before read super) so there is no point trying to
1196                             parse these options again and set anything and it
1197                             is ok to just ignore them */
1198                         continue;
1199                 } else if (strnicmp(data, "ro", 2) == 0) {
1200                         vol->rw = FALSE;
1201                 } else if (strnicmp(data, "hard", 4) == 0) {
1202                         vol->retry = 1;
1203                 } else if (strnicmp(data, "soft", 4) == 0) {
1204                         vol->retry = 0;
1205                 } else if (strnicmp(data, "perm", 4) == 0) {
1206                         vol->noperm = 0;
1207                 } else if (strnicmp(data, "noperm", 6) == 0) {
1208                         vol->noperm = 1;
1209                 } else if (strnicmp(data, "mapchars", 8) == 0) {
1210                         vol->remap = 1;
1211                 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1212                         vol->remap = 0;
1213                 } else if (strnicmp(data, "sfu", 3) == 0) {
1214                         vol->sfu_emul = 1;
1215                 } else if (strnicmp(data, "nosfu", 5) == 0) {
1216                         vol->sfu_emul = 0;
1217                 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1218                         vol->posix_paths = 1;
1219                 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1220                         vol->posix_paths = 0;
1221                 } else if (strnicmp(data, "nounix", 6) == 0) {
1222                         vol->no_linux_ext = 1;
1223                 } else if (strnicmp(data, "nolinux", 7) == 0) {
1224                         vol->no_linux_ext = 1;
1225                 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1226                            (strnicmp(data, "ignorecase", 10)  == 0)) {
1227                         vol->nocase = 1;
1228                 } else if (strnicmp(data, "brl", 3) == 0) {
1229                         vol->nobrl =  0;
1230                 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1231                            (strnicmp(data, "nolock", 6) == 0)) {
1232                         vol->nobrl =  1;
1233                         /* turn off mandatory locking in mode
1234                         if remote locking is turned off since the
1235                         local vfs will do advisory */
1236                         if (vol->file_mode ==
1237                                 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1238                                 vol->file_mode = S_IALLUGO;
1239                 } else if (strnicmp(data, "setuids", 7) == 0) {
1240                         vol->setuids = 1;
1241                 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1242                         vol->setuids = 0;
1243                 } else if (strnicmp(data, "nohard", 6) == 0) {
1244                         vol->retry = 0;
1245                 } else if (strnicmp(data, "nosoft", 6) == 0) {
1246                         vol->retry = 1;
1247                 } else if (strnicmp(data, "nointr", 6) == 0) {
1248                         vol->intr = 0;
1249                 } else if (strnicmp(data, "intr", 4) == 0) {
1250                         vol->intr = 1;
1251                 } else if (strnicmp(data, "serverino", 7) == 0) {
1252                         vol->server_ino = 1;
1253                 } else if (strnicmp(data, "noserverino", 9) == 0) {
1254                         vol->server_ino = 0;
1255                 } else if (strnicmp(data, "cifsacl", 7) == 0) {
1256                         vol->cifs_acl = 1;
1257                 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1258                         vol->cifs_acl = 0;
1259                 } else if (strnicmp(data, "acl", 3) == 0) {
1260                         vol->no_psx_acl = 0;
1261                 } else if (strnicmp(data, "noacl", 5) == 0) {
1262                         vol->no_psx_acl = 1;
1263                 } else if (strnicmp(data, "sign", 4) == 0) {
1264                         vol->secFlg |= CIFSSEC_MUST_SIGN;
1265 /*              } else if (strnicmp(data, "seal",4) == 0) {
1266                         vol->secFlg |= CIFSSEC_MUST_SEAL; */
1267                 } else if (strnicmp(data, "direct", 6) == 0) {
1268                         vol->direct_io = 1;
1269                 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
1270                         vol->direct_io = 1;
1271                 } else if (strnicmp(data, "in6_addr", 8) == 0) {
1272                         if (!value || !*value) {
1273                                 vol->in6_addr = NULL;
1274                         } else if (strnlen(value, 49) == 48) {
1275                                 vol->in6_addr = value;
1276                         } else {
1277                                 printk(KERN_WARNING "CIFS: ip v6 address not "
1278                                                     "48 characters long\n");
1279                                 return 1;
1280                         }
1281                 } else if (strnicmp(data, "noac", 4) == 0) {
1282                         printk(KERN_WARNING "CIFS: Mount option noac not "
1283                                 "supported. Instead set "
1284                                 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1285                 } else
1286                         printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1287                                                 data);
1288         }
1289         if (vol->UNC == NULL) {
1290                 if (devname == NULL) {
1291                         printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1292                                                 "target\n");
1293                         return 1;
1294                 }
1295                 if ((temp_len = strnlen(devname, 300)) < 300) {
1296                         vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1297                         if (vol->UNC == NULL)
1298                                 return 1;
1299                         strcpy(vol->UNC, devname);
1300                         if (strncmp(vol->UNC, "//", 2) == 0) {
1301                                 vol->UNC[0] = '\\';
1302                                 vol->UNC[1] = '\\';
1303                         } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1304                                 printk(KERN_WARNING "CIFS: UNC Path does not "
1305                                                     "begin with // or \\\\ \n");
1306                                 return 1;
1307                         }
1308                 } else {
1309                         printk(KERN_WARNING "CIFS: UNC name too long\n");
1310                         return 1;
1311                 }
1312         }
1313         if (vol->UNCip == NULL)
1314                 vol->UNCip = &vol->UNC[2];
1315
1316         return 0;
1317 }
1318
1319 static struct cifsSesInfo *
1320 cifs_find_tcp_session(struct in_addr *target_ip_addr,
1321                 struct in6_addr *target_ip6_addr,
1322                  char *userName, struct TCP_Server_Info **psrvTcp)
1323 {
1324         struct list_head *tmp;
1325         struct cifsSesInfo *ses;
1326         *psrvTcp = NULL;
1327         read_lock(&GlobalSMBSeslock);
1328
1329         list_for_each(tmp, &GlobalSMBSessionList) {
1330                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
1331                 if (ses->server) {
1332                         if ((target_ip_addr &&
1333                                 (ses->server->addr.sockAddr.sin_addr.s_addr
1334                                   == target_ip_addr->s_addr)) || (target_ip6_addr
1335                                 && memcmp(&ses->server->addr.sockAddr6.sin6_addr,
1336                                         target_ip6_addr, sizeof(*target_ip6_addr)))) {
1337                                 /* BB lock server and tcp session and increment
1338                                       use count here?? */
1339
1340                                 /* found a match on the TCP session */
1341                                 *psrvTcp = ses->server;
1342
1343                                 /* BB check if reconnection needed */
1344                                 if (strncmp
1345                                     (ses->userName, userName,
1346                                      MAX_USERNAME_SIZE) == 0){
1347                                         read_unlock(&GlobalSMBSeslock);
1348                                         /* Found exact match on both TCP and
1349                                            SMB sessions */
1350                                         return ses;
1351                                 }
1352                         }
1353                 }
1354                 /* else tcp and smb sessions need reconnection */
1355         }
1356         read_unlock(&GlobalSMBSeslock);
1357         return NULL;
1358 }
1359
1360 static struct cifsTconInfo *
1361 find_unc(__be32 new_target_ip_addr, char *uncName, char *userName)
1362 {
1363         struct list_head *tmp;
1364         struct cifsTconInfo *tcon;
1365
1366         read_lock(&GlobalSMBSeslock);
1367         list_for_each(tmp, &GlobalTreeConnectionList) {
1368                 cFYI(1, ("Next tcon"));
1369                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
1370                 if (tcon->ses) {
1371                         if (tcon->ses->server) {
1372                                 cFYI(1,
1373                                      ("old ip addr: %x == new ip %x ?",
1374                                       tcon->ses->server->addr.sockAddr.sin_addr.
1375                                       s_addr, new_target_ip_addr));
1376                                 if (tcon->ses->server->addr.sockAddr.sin_addr.
1377                                     s_addr == new_target_ip_addr) {
1378         /* BB lock tcon, server and tcp session and increment use count here? */
1379                                         /* found a match on the TCP session */
1380                                         /* BB check if reconnection needed */
1381                                         cFYI(1,
1382                                               ("IP match, old UNC: %s new: %s",
1383                                               tcon->treeName, uncName));
1384                                         if (strncmp
1385                                             (tcon->treeName, uncName,
1386                                              MAX_TREE_SIZE) == 0) {
1387                                                 cFYI(1,
1388                                                      ("and old usr: %s new: %s",
1389                                                       tcon->treeName, uncName));
1390                                                 if (strncmp
1391                                                     (tcon->ses->userName,
1392                                                      userName,
1393                                                      MAX_USERNAME_SIZE) == 0) {
1394                                                         read_unlock(&GlobalSMBSeslock);
1395                                                         /* matched smb session
1396                                                         (user name */
1397                                                         return tcon;
1398                                                 }
1399                                         }
1400                                 }
1401                         }
1402                 }
1403         }
1404         read_unlock(&GlobalSMBSeslock);
1405         return NULL;
1406 }
1407
1408 int
1409 connect_to_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1410                     const char *old_path, const struct nls_table *nls_codepage,
1411                     int remap)
1412 {
1413         struct dfs_info3_param *referrals = NULL;
1414         unsigned int num_referrals;
1415         int rc = 0;
1416
1417         rc = get_dfs_path(xid, pSesInfo, old_path, nls_codepage,
1418                         &num_referrals, &referrals, remap);
1419
1420         /* BB Add in code to: if valid refrl, if not ip address contact
1421                 the helper that resolves tcp names, mount to it, try to
1422                 tcon to it unmount it if fail */
1423
1424         kfree(referrals);
1425
1426         return rc;
1427 }
1428
1429 int
1430 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
1431              const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
1432              struct dfs_info3_param **preferrals, int remap)
1433 {
1434         char *temp_unc;
1435         int rc = 0;
1436         unsigned char *targetUNCs;
1437
1438         *pnum_referrals = 0;
1439         *preferrals = NULL;
1440
1441         if (pSesInfo->ipc_tid == 0) {
1442                 temp_unc = kmalloc(2 /* for slashes */ +
1443                         strnlen(pSesInfo->serverName,
1444                                 SERVER_NAME_LEN_WITH_NULL * 2)
1445                                  + 1 + 4 /* slash IPC$ */  + 2,
1446                                 GFP_KERNEL);
1447                 if (temp_unc == NULL)
1448                         return -ENOMEM;
1449                 temp_unc[0] = '\\';
1450                 temp_unc[1] = '\\';
1451                 strcpy(temp_unc + 2, pSesInfo->serverName);
1452                 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1453                 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1454                 cFYI(1,
1455                      ("CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid));
1456                 kfree(temp_unc);
1457         }
1458         if (rc == 0)
1459                 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, &targetUNCs,
1460                                      pnum_referrals, nls_codepage, remap);
1461         /* BB map targetUNCs to dfs_info3 structures, here or
1462                 in CIFSGetDFSRefer BB */
1463
1464         return rc;
1465 }
1466
1467 /* See RFC1001 section 14 on representation of Netbios names */
1468 static void rfc1002mangle(char *target, char *source, unsigned int length)
1469 {
1470         unsigned int i, j;
1471
1472         for (i = 0, j = 0; i < (length); i++) {
1473                 /* mask a nibble at a time and encode */
1474                 target[j] = 'A' + (0x0F & (source[i] >> 4));
1475                 target[j+1] = 'A' + (0x0F & source[i]);
1476                 j += 2;
1477         }
1478
1479 }
1480
1481
1482 static int
1483 ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
1484              char *netbios_name, char *target_name)
1485 {
1486         int rc = 0;
1487         int connected = 0;
1488         __be16 orig_port = 0;
1489
1490         if (*csocket == NULL) {
1491                 rc = sock_create_kern(PF_INET, SOCK_STREAM,
1492                                       IPPROTO_TCP, csocket);
1493                 if (rc < 0) {
1494                         cERROR(1, ("Error %d creating socket", rc));
1495                         *csocket = NULL;
1496                         return rc;
1497                 } else {
1498                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1499                         cFYI(1, ("Socket created"));
1500                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1501                 }
1502         }
1503
1504         psin_server->sin_family = AF_INET;
1505         if (psin_server->sin_port) { /* user overrode default port */
1506                 rc = (*csocket)->ops->connect(*csocket,
1507                                 (struct sockaddr *) psin_server,
1508                                 sizeof(struct sockaddr_in), 0);
1509                 if (rc >= 0)
1510                         connected = 1;
1511         }
1512
1513         if (!connected) {
1514                 /* save original port so we can retry user specified port
1515                         later if fall back ports fail this time  */
1516                 orig_port = psin_server->sin_port;
1517
1518                 /* do not retry on the same port we just failed on */
1519                 if (psin_server->sin_port != htons(CIFS_PORT)) {
1520                         psin_server->sin_port = htons(CIFS_PORT);
1521
1522                         rc = (*csocket)->ops->connect(*csocket,
1523                                         (struct sockaddr *) psin_server,
1524                                         sizeof(struct sockaddr_in), 0);
1525                         if (rc >= 0)
1526                                 connected = 1;
1527                 }
1528         }
1529         if (!connected) {
1530                 psin_server->sin_port = htons(RFC1001_PORT);
1531                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1532                                               psin_server,
1533                                               sizeof(struct sockaddr_in), 0);
1534                 if (rc >= 0)
1535                         connected = 1;
1536         }
1537
1538         /* give up here - unless we want to retry on different
1539                 protocol families some day */
1540         if (!connected) {
1541                 if (orig_port)
1542                         psin_server->sin_port = orig_port;
1543                 cFYI(1, ("Error %d connecting to server via ipv4", rc));
1544                 sock_release(*csocket);
1545                 *csocket = NULL;
1546                 return rc;
1547         }
1548         /* Eventually check for other socket options to change from
1549                 the default. sock_setsockopt not used because it expects
1550                 user space buffer */
1551          cFYI(1, ("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
1552                  (*csocket)->sk->sk_sndbuf,
1553                  (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
1554         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1555         /* make the bufsizes depend on wsize/rsize and max requests */
1556         if ((*csocket)->sk->sk_sndbuf < (200 * 1024))
1557                 (*csocket)->sk->sk_sndbuf = 200 * 1024;
1558         if ((*csocket)->sk->sk_rcvbuf < (140 * 1024))
1559                 (*csocket)->sk->sk_rcvbuf = 140 * 1024;
1560
1561         /* send RFC1001 sessinit */
1562         if (psin_server->sin_port == htons(RFC1001_PORT)) {
1563                 /* some servers require RFC1001 sessinit before sending
1564                 negprot - BB check reconnection in case where second
1565                 sessinit is sent but no second negprot */
1566                 struct rfc1002_session_packet *ses_init_buf;
1567                 struct smb_hdr *smb_buf;
1568                 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
1569                                        GFP_KERNEL);
1570                 if (ses_init_buf) {
1571                         ses_init_buf->trailer.session_req.called_len = 32;
1572                         if (target_name && (target_name[0] != 0)) {
1573                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1574                                         target_name, 16);
1575                         } else {
1576                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1577                                         DEFAULT_CIFS_CALLED_NAME, 16);
1578                         }
1579
1580                         ses_init_buf->trailer.session_req.calling_len = 32;
1581                         /* calling name ends in null (byte 16) from old smb
1582                         convention. */
1583                         if (netbios_name && (netbios_name[0] != 0)) {
1584                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1585                                         netbios_name, 16);
1586                         } else {
1587                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1588                                         "LINUX_CIFS_CLNT", 16);
1589                         }
1590                         ses_init_buf->trailer.session_req.scope1 = 0;
1591                         ses_init_buf->trailer.session_req.scope2 = 0;
1592                         smb_buf = (struct smb_hdr *)ses_init_buf;
1593                         /* sizeof RFC1002_SESSION_REQUEST with no scope */
1594                         smb_buf->smb_buf_length = 0x81000044;
1595                         rc = smb_send(*csocket, smb_buf, 0x44,
1596                                 (struct sockaddr *)psin_server);
1597                         kfree(ses_init_buf);
1598                         msleep(1); /* RFC1001 layer in at least one server
1599                                       requires very short break before negprot
1600                                       presumably because not expecting negprot
1601                                       to follow so fast.  This is a simple
1602                                       solution that works without
1603                                       complicating the code and causes no
1604                                       significant slowing down on mount
1605                                       for everyone else */
1606                 }
1607                 /* else the negprot may still work without this
1608                 even though malloc failed */
1609
1610         }
1611
1612         return rc;
1613 }
1614
1615 static int
1616 ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
1617 {
1618         int rc = 0;
1619         int connected = 0;
1620         __be16 orig_port = 0;
1621
1622         if (*csocket == NULL) {
1623                 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
1624                                       IPPROTO_TCP, csocket);
1625                 if (rc < 0) {
1626                         cERROR(1, ("Error %d creating ipv6 socket", rc));
1627                         *csocket = NULL;
1628                         return rc;
1629                 } else {
1630                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1631                          cFYI(1, ("ipv6 Socket created"));
1632                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1633                 }
1634         }
1635
1636         psin_server->sin6_family = AF_INET6;
1637
1638         if (psin_server->sin6_port) { /* user overrode default port */
1639                 rc = (*csocket)->ops->connect(*csocket,
1640                                 (struct sockaddr *) psin_server,
1641                                 sizeof(struct sockaddr_in6), 0);
1642                 if (rc >= 0)
1643                         connected = 1;
1644         }
1645
1646         if (!connected) {
1647                 /* save original port so we can retry user specified port
1648                         later if fall back ports fail this time  */
1649
1650                 orig_port = psin_server->sin6_port;
1651                 /* do not retry on the same port we just failed on */
1652                 if (psin_server->sin6_port != htons(CIFS_PORT)) {
1653                         psin_server->sin6_port = htons(CIFS_PORT);
1654
1655                         rc = (*csocket)->ops->connect(*csocket,
1656                                         (struct sockaddr *) psin_server,
1657                                         sizeof(struct sockaddr_in6), 0);
1658                         if (rc >= 0)
1659                                 connected = 1;
1660                 }
1661         }
1662         if (!connected) {
1663                 psin_server->sin6_port = htons(RFC1001_PORT);
1664                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1665                                  psin_server, sizeof(struct sockaddr_in6), 0);
1666                 if (rc >= 0)
1667                         connected = 1;
1668         }
1669
1670         /* give up here - unless we want to retry on different
1671                 protocol families some day */
1672         if (!connected) {
1673                 if (orig_port)
1674                         psin_server->sin6_port = orig_port;
1675                 cFYI(1, ("Error %d connecting to server via ipv6", rc));
1676                 sock_release(*csocket);
1677                 *csocket = NULL;
1678                 return rc;
1679         }
1680         /* Eventually check for other socket options to change from
1681                 the default. sock_setsockopt not used because it expects
1682                 user space buffer */
1683         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1684
1685         return rc;
1686 }
1687
1688 void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
1689                           struct super_block *sb, struct smb_vol *vol_info)
1690 {
1691         /* if we are reconnecting then should we check to see if
1692          * any requested capabilities changed locally e.g. via
1693          * remount but we can not do much about it here
1694          * if they have (even if we could detect it by the following)
1695          * Perhaps we could add a backpointer to array of sb from tcon
1696          * or if we change to make all sb to same share the same
1697          * sb as NFS - then we only have one backpointer to sb.
1698          * What if we wanted to mount the server share twice once with
1699          * and once without posixacls or posix paths? */
1700         __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1701
1702         if (vol_info && vol_info->no_linux_ext) {
1703                 tcon->fsUnixInfo.Capability = 0;
1704                 tcon->unix_ext = 0; /* Unix Extensions disabled */
1705                 cFYI(1, ("Linux protocol extensions disabled"));
1706                 return;
1707         } else if (vol_info)
1708                 tcon->unix_ext = 1; /* Unix Extensions supported */
1709
1710         if (tcon->unix_ext == 0) {
1711                 cFYI(1, ("Unix extensions disabled so not set on reconnect"));
1712                 return;
1713         }
1714
1715         if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
1716                 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1717
1718                 /* check for reconnect case in which we do not
1719                    want to change the mount behavior if we can avoid it */
1720                 if (vol_info == NULL) {
1721                         /* turn off POSIX ACL and PATHNAMES if not set
1722                            originally at mount time */
1723                         if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
1724                                 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1725                         if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0)
1726                                 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1727                 }
1728
1729                 cap &= CIFS_UNIX_CAP_MASK;
1730                 if (vol_info && vol_info->no_psx_acl)
1731                         cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1732                 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
1733                         cFYI(1, ("negotiated posix acl support"));
1734                         if (sb)
1735                                 sb->s_flags |= MS_POSIXACL;
1736                 }
1737
1738                 if (vol_info && vol_info->posix_paths == 0)
1739                         cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1740                 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
1741                         cFYI(1, ("negotiate posix pathnames"));
1742                         if (sb)
1743                                 CIFS_SB(sb)->mnt_cifs_flags |=
1744                                         CIFS_MOUNT_POSIX_PATHS;
1745                 }
1746
1747                 /* We might be setting the path sep back to a different
1748                 form if we are reconnecting and the server switched its
1749                 posix path capability for this share */
1750                 if (sb && (CIFS_SB(sb)->prepathlen > 0))
1751                         CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
1752
1753                 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
1754                         if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
1755                                 CIFS_SB(sb)->rsize = 127 * 1024;
1756                                 cFYI(DBG2,
1757                                         ("larger reads not supported by srv"));
1758                         }
1759                 }
1760
1761
1762                 cFYI(1, ("Negotiate caps 0x%x", (int)cap));
1763 #ifdef CONFIG_CIFS_DEBUG2
1764                 if (cap & CIFS_UNIX_FCNTL_CAP)
1765                         cFYI(1, ("FCNTL cap"));
1766                 if (cap & CIFS_UNIX_EXTATTR_CAP)
1767                         cFYI(1, ("EXTATTR cap"));
1768                 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
1769                         cFYI(1, ("POSIX path cap"));
1770                 if (cap & CIFS_UNIX_XATTR_CAP)
1771                         cFYI(1, ("XATTR cap"));
1772                 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
1773                         cFYI(1, ("POSIX ACL cap"));
1774                 if (cap & CIFS_UNIX_LARGE_READ_CAP)
1775                         cFYI(1, ("very large read cap"));
1776                 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
1777                         cFYI(1, ("very large write cap"));
1778 #endif /* CIFS_DEBUG2 */
1779                 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
1780                         if (vol_info == NULL) {
1781                                 cFYI(1, ("resetting capabilities failed"));
1782                         } else
1783                                 cERROR(1, ("Negotiating Unix capabilities "
1784                                            "with the server failed.  Consider "
1785                                            "mounting with the Unix Extensions\n"
1786                                            "disabled, if problems are found, "
1787                                            "by specifying the nounix mount "
1788                                            "option."));
1789
1790                 }
1791         }
1792 }
1793
1794 static void
1795 convert_delimiter(char *path, char delim)
1796 {
1797         int i;
1798
1799         if (path == NULL)
1800                 return;
1801
1802         for (i = 0; path[i] != '\0'; i++) {
1803                 if ((path[i] == '/') || (path[i] == '\\'))
1804                         path[i] = delim;
1805         }
1806 }
1807
1808 int
1809 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
1810            char *mount_data, const char *devname)
1811 {
1812         int rc = 0;
1813         int xid;
1814         int address_type = AF_INET;
1815         struct socket *csocket = NULL;
1816         struct sockaddr_in sin_server;
1817         struct sockaddr_in6 sin_server6;
1818         struct smb_vol volume_info;
1819         struct cifsSesInfo *pSesInfo = NULL;
1820         struct cifsSesInfo *existingCifsSes = NULL;
1821         struct cifsTconInfo *tcon = NULL;
1822         struct TCP_Server_Info *srvTcp = NULL;
1823
1824         xid = GetXid();
1825
1826 /* cFYI(1, ("Entering cifs_mount. Xid: %d with: %s", xid, mount_data)); */
1827
1828         memset(&volume_info, 0, sizeof(struct smb_vol));
1829         if (cifs_parse_mount_options(mount_data, devname, &volume_info)) {
1830                 rc = -EINVAL;
1831                 goto out;
1832         }
1833
1834         if (volume_info.nullauth) {
1835                 cFYI(1, ("null user"));
1836                 volume_info.username = "";
1837         } else if (volume_info.username) {
1838                 /* BB fixme parse for domain name here */
1839                 cFYI(1, ("Username: %s", volume_info.username));
1840         } else {
1841                 cifserror("No username specified");
1842         /* In userspace mount helper we can get user name from alternate
1843            locations such as env variables and files on disk */
1844                 rc = -EINVAL;
1845                 goto out;
1846         }
1847
1848         if (volume_info.UNCip && volume_info.UNC) {
1849                 rc = cifs_inet_pton(AF_INET, volume_info.UNCip,
1850                                     &sin_server.sin_addr.s_addr);
1851
1852                 if (rc <= 0) {
1853                         /* not ipv4 address, try ipv6 */
1854                         rc = cifs_inet_pton(AF_INET6, volume_info.UNCip,
1855                                             &sin_server6.sin6_addr.in6_u);
1856                         if (rc > 0)
1857                                 address_type = AF_INET6;
1858                 } else {
1859                         address_type = AF_INET;
1860                 }
1861
1862                 if (rc <= 0) {
1863                         /* we failed translating address */
1864                         rc = -EINVAL;
1865                         goto out;
1866                 }
1867
1868                 cFYI(1, ("UNC: %s ip: %s", volume_info.UNC, volume_info.UNCip));
1869                 /* success */
1870                 rc = 0;
1871         } else if (volume_info.UNCip) {
1872                 /* BB using ip addr as server name to connect to the
1873                    DFS root below */
1874                 cERROR(1, ("Connecting to DFS root not implemented yet"));
1875                 rc = -EINVAL;
1876                 goto out;
1877         } else /* which servers DFS root would we conect to */ {
1878                 cERROR(1,
1879                        ("CIFS mount error: No UNC path (e.g. -o "
1880                         "unc=//192.168.1.100/public) specified"));
1881                 rc = -EINVAL;
1882                 goto out;
1883         }
1884
1885         /* this is needed for ASCII cp to Unicode converts */
1886         if (volume_info.iocharset == NULL) {
1887                 cifs_sb->local_nls = load_nls_default();
1888         /* load_nls_default can not return null */
1889         } else {
1890                 cifs_sb->local_nls = load_nls(volume_info.iocharset);
1891                 if (cifs_sb->local_nls == NULL) {
1892                         cERROR(1, ("CIFS mount error: iocharset %s not found",
1893                                  volume_info.iocharset));
1894                         rc = -ELIBACC;
1895                         goto out;
1896                 }
1897         }
1898
1899         if (address_type == AF_INET)
1900                 existingCifsSes = cifs_find_tcp_session(&sin_server.sin_addr,
1901                         NULL /* no ipv6 addr */,
1902                         volume_info.username, &srvTcp);
1903         else if (address_type == AF_INET6) {
1904                 cFYI(1, ("looking for ipv6 address"));
1905                 existingCifsSes = cifs_find_tcp_session(NULL /* no ipv4 addr */,
1906                         &sin_server6.sin6_addr,
1907                         volume_info.username, &srvTcp);
1908         } else {
1909                 rc = -EINVAL;
1910                 goto out;
1911         }
1912
1913         if (srvTcp) {
1914                 cFYI(1, ("Existing tcp session with server found"));
1915         } else {        /* create socket */
1916                 if (volume_info.port)
1917                         sin_server.sin_port = htons(volume_info.port);
1918                 else
1919                         sin_server.sin_port = 0;
1920                 if (address_type == AF_INET6) {
1921                         cFYI(1, ("attempting ipv6 connect"));
1922                         /* BB should we allow ipv6 on port 139? */
1923                         /* other OS never observed in Wild doing 139 with v6 */
1924                         rc = ipv6_connect(&sin_server6, &csocket);
1925                 } else
1926                         rc = ipv4_connect(&sin_server, &csocket,
1927                                   volume_info.source_rfc1001_name,
1928                                   volume_info.target_rfc1001_name);
1929                 if (rc < 0) {
1930                         cERROR(1, ("Error connecting to IPv4 socket. "
1931                                    "Aborting operation"));
1932                         if (csocket != NULL)
1933                                 sock_release(csocket);
1934                         goto out;
1935                 }
1936
1937                 srvTcp = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1938                 if (!srvTcp) {
1939                         rc = -ENOMEM;
1940                         sock_release(csocket);
1941                         goto out;
1942                 } else {
1943                         memcpy(&srvTcp->addr.sockAddr, &sin_server,
1944                                 sizeof(struct sockaddr_in));
1945                         atomic_set(&srvTcp->inFlight, 0);
1946                         /* BB Add code for ipv6 case too */
1947                         srvTcp->ssocket = csocket;
1948                         srvTcp->protocolType = IPV4;
1949                         srvTcp->hostname = extract_hostname(volume_info.UNC);
1950                         if (IS_ERR(srvTcp->hostname)) {
1951                                 rc = PTR_ERR(srvTcp->hostname);
1952                                 sock_release(csocket);
1953                                 goto out;
1954                         }
1955                         init_waitqueue_head(&srvTcp->response_q);
1956                         init_waitqueue_head(&srvTcp->request_q);
1957                         INIT_LIST_HEAD(&srvTcp->pending_mid_q);
1958                         /* at this point we are the only ones with the pointer
1959                         to the struct since the kernel thread not created yet
1960                         so no need to spinlock this init of tcpStatus */
1961                         srvTcp->tcpStatus = CifsNew;
1962                         init_MUTEX(&srvTcp->tcpSem);
1963                         srvTcp->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, srvTcp, "cifsd");
1964                         if (IS_ERR(srvTcp->tsk)) {
1965                                 rc = PTR_ERR(srvTcp->tsk);
1966                                 cERROR(1, ("error %d create cifsd thread", rc));
1967                                 srvTcp->tsk = NULL;
1968                                 sock_release(csocket);
1969                                 kfree(srvTcp->hostname);
1970                                 goto out;
1971                         }
1972                         wait_for_completion(&cifsd_complete);
1973                         rc = 0;
1974                         memcpy(srvTcp->workstation_RFC1001_name,
1975                                 volume_info.source_rfc1001_name, 16);
1976                         memcpy(srvTcp->server_RFC1001_name,
1977                                 volume_info.target_rfc1001_name, 16);
1978                         srvTcp->sequence_number = 0;
1979                 }
1980         }
1981
1982         if (existingCifsSes) {
1983                 pSesInfo = existingCifsSes;
1984                 cFYI(1, ("Existing smb sess found (status=%d)",
1985                         pSesInfo->status));
1986                 down(&pSesInfo->sesSem);
1987                 if (pSesInfo->status == CifsNeedReconnect) {
1988                         cFYI(1, ("Session needs reconnect"));
1989                         rc = cifs_setup_session(xid, pSesInfo,
1990                                                 cifs_sb->local_nls);
1991                 }
1992                 up(&pSesInfo->sesSem);
1993         } else if (!rc) {
1994                 cFYI(1, ("Existing smb sess not found"));
1995                 pSesInfo = sesInfoAlloc();
1996                 if (pSesInfo == NULL)
1997                         rc = -ENOMEM;
1998                 else {
1999                         pSesInfo->server = srvTcp;
2000                         sprintf(pSesInfo->serverName, "%u.%u.%u.%u",
2001                                 NIPQUAD(sin_server.sin_addr.s_addr));
2002                 }
2003
2004                 if (!rc) {
2005                         /* volume_info.password freed at unmount */
2006                         if (volume_info.password) {
2007                                 pSesInfo->password = volume_info.password;
2008                                 /* set to NULL to prevent freeing on exit */
2009                                 volume_info.password = NULL;
2010                         }
2011                         if (volume_info.username)
2012                                 strncpy(pSesInfo->userName,
2013                                         volume_info.username,
2014                                         MAX_USERNAME_SIZE);
2015                         if (volume_info.domainname) {
2016                                 int len = strlen(volume_info.domainname);
2017                                 pSesInfo->domainName =
2018                                         kmalloc(len + 1, GFP_KERNEL);
2019                                 if (pSesInfo->domainName)
2020                                         strcpy(pSesInfo->domainName,
2021                                                 volume_info.domainname);
2022                         }
2023                         pSesInfo->linux_uid = volume_info.linux_uid;
2024                         pSesInfo->overrideSecFlg = volume_info.secFlg;
2025                         down(&pSesInfo->sesSem);
2026                         /* BB FIXME need to pass vol->secFlgs BB */
2027                         rc = cifs_setup_session(xid, pSesInfo,
2028                                                 cifs_sb->local_nls);
2029                         up(&pSesInfo->sesSem);
2030                         if (!rc)
2031                                 atomic_inc(&srvTcp->socketUseCount);
2032                 }
2033         }
2034
2035         /* search for existing tcon to this server share */
2036         if (!rc) {
2037                 if (volume_info.rsize > CIFSMaxBufSize) {
2038                         cERROR(1, ("rsize %d too large, using MaxBufSize",
2039                                 volume_info.rsize));
2040                         cifs_sb->rsize = CIFSMaxBufSize;
2041                 } else if ((volume_info.rsize) &&
2042                                 (volume_info.rsize <= CIFSMaxBufSize))
2043                         cifs_sb->rsize = volume_info.rsize;
2044                 else /* default */
2045                         cifs_sb->rsize = CIFSMaxBufSize;
2046
2047                 if (volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
2048                         cERROR(1, ("wsize %d too large, using 4096 instead",
2049                                   volume_info.wsize));
2050                         cifs_sb->wsize = 4096;
2051                 } else if (volume_info.wsize)
2052                         cifs_sb->wsize = volume_info.wsize;
2053                 else
2054                         cifs_sb->wsize =
2055                                 min_t(const int, PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2056                                         127*1024);
2057                         /* old default of CIFSMaxBufSize was too small now
2058                            that SMB Write2 can send multiple pages in kvec.
2059                            RFC1001 does not describe what happens when frame
2060                            bigger than 128K is sent so use that as max in
2061                            conjunction with 52K kvec constraint on arch with 4K
2062                            page size  */
2063
2064                 if (cifs_sb->rsize < 2048) {
2065                         cifs_sb->rsize = 2048;
2066                         /* Windows ME may prefer this */
2067                         cFYI(1, ("readsize set to minimum: 2048"));
2068                 }
2069                 /* calculate prepath */
2070                 cifs_sb->prepath = volume_info.prepath;
2071                 if (cifs_sb->prepath) {
2072                         cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2073                         /* we can not convert the / to \ in the path
2074                         separators in the prefixpath yet because we do not
2075                         know (until reset_cifs_unix_caps is called later)
2076                         whether POSIX PATH CAP is available. We normalize
2077                         the / to \ after reset_cifs_unix_caps is called */
2078                         volume_info.prepath = NULL;
2079                 } else
2080                         cifs_sb->prepathlen = 0;
2081                 cifs_sb->mnt_uid = volume_info.linux_uid;
2082                 cifs_sb->mnt_gid = volume_info.linux_gid;
2083                 cifs_sb->mnt_file_mode = volume_info.file_mode;
2084                 cifs_sb->mnt_dir_mode = volume_info.dir_mode;
2085                 cFYI(1, ("file mode: 0x%x  dir mode: 0x%x",
2086                         cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode));
2087
2088                 if (volume_info.noperm)
2089                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2090                 if (volume_info.setuids)
2091                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2092                 if (volume_info.server_ino)
2093                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2094                 if (volume_info.remap)
2095                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2096                 if (volume_info.no_xattr)
2097                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2098                 if (volume_info.sfu_emul)
2099                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2100                 if (volume_info.nobrl)
2101                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2102                 if (volume_info.cifs_acl)
2103                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2104                 if (volume_info.override_uid)
2105                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2106                 if (volume_info.override_gid)
2107                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2108                 if (volume_info.direct_io) {
2109                         cFYI(1, ("mounting share using direct i/o"));
2110                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2111                 }
2112
2113                 tcon =
2114                     find_unc(sin_server.sin_addr.s_addr, volume_info.UNC,
2115                              volume_info.username);
2116                 if (tcon) {
2117                         cFYI(1, ("Found match on UNC path"));
2118                         /* we can have only one retry value for a connection
2119                            to a share so for resources mounted more than once
2120                            to the same server share the last value passed in
2121                            for the retry flag is used */
2122                         tcon->retry = volume_info.retry;
2123                         tcon->nocase = volume_info.nocase;
2124                 } else {
2125                         tcon = tconInfoAlloc();
2126                         if (tcon == NULL)
2127                                 rc = -ENOMEM;
2128                         else {
2129                                 /* check for null share name ie connecting to
2130                                  * dfs root */
2131
2132                                 /* BB check if this works for exactly length
2133                                  * three strings */
2134                                 if ((strchr(volume_info.UNC + 3, '\\') == NULL)
2135                                     && (strchr(volume_info.UNC + 3, '/') ==
2136                                         NULL)) {
2137                                         rc = connect_to_dfs_path(xid, pSesInfo,
2138                                                 "", cifs_sb->local_nls,
2139                                                 cifs_sb->mnt_cifs_flags &
2140                                                   CIFS_MOUNT_MAP_SPECIAL_CHR);
2141                                         rc = -ENODEV;
2142                                         goto out;
2143                                 } else {
2144                                         /* BB Do we need to wrap sesSem around
2145                                          * this TCon call and Unix SetFS as
2146                                          * we do on SessSetup and reconnect? */
2147                                         rc = CIFSTCon(xid, pSesInfo,
2148                                                 volume_info.UNC,
2149                                                 tcon, cifs_sb->local_nls);
2150                                         cFYI(1, ("CIFS Tcon rc = %d", rc));
2151                                 }
2152                                 if (!rc) {
2153                                         atomic_inc(&pSesInfo->inUse);
2154                                         tcon->retry = volume_info.retry;
2155                                         tcon->nocase = volume_info.nocase;
2156                                 }
2157                         }
2158                 }
2159         }
2160         if (pSesInfo) {
2161                 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
2162                         sb->s_maxbytes = (u64) 1 << 63;
2163                 } else
2164                         sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
2165         }
2166
2167         /* BB FIXME fix time_gran to be larger for LANMAN sessions */
2168         sb->s_time_gran = 100;
2169
2170 /* on error free sesinfo and tcon struct if needed */
2171         if (rc) {
2172                 /* if session setup failed, use count is zero but
2173                 we still need to free cifsd thread */
2174                 if (atomic_read(&srvTcp->socketUseCount) == 0) {
2175                         spin_lock(&GlobalMid_Lock);
2176                         srvTcp->tcpStatus = CifsExiting;
2177                         spin_unlock(&GlobalMid_Lock);
2178                         if (srvTcp->tsk) {
2179                                 struct task_struct *tsk;
2180                                 /* If we could verify that kthread_stop would
2181                                    always wake up processes blocked in
2182                                    tcp in recv_mesg then we could remove the
2183                                    send_sig call */
2184                                 force_sig(SIGKILL, srvTcp->tsk);
2185                                 tsk = srvTcp->tsk;
2186                                 if (tsk)
2187                                         kthread_stop(tsk);
2188                         }
2189                 }
2190                  /* If find_unc succeeded then rc == 0 so we can not end */
2191                 if (tcon)  /* up accidently freeing someone elses tcon struct */
2192                         tconInfoFree(tcon);
2193                 if (existingCifsSes == NULL) {
2194                         if (pSesInfo) {
2195                                 if ((pSesInfo->server) &&
2196                                     (pSesInfo->status == CifsGood)) {
2197                                         int temp_rc;
2198                                         temp_rc = CIFSSMBLogoff(xid, pSesInfo);
2199                                         /* if the socketUseCount is now zero */
2200                                         if ((temp_rc == -ESHUTDOWN) &&
2201                                             (pSesInfo->server) &&
2202                                             (pSesInfo->server->tsk)) {
2203                                                 struct task_struct *tsk;
2204                                                 force_sig(SIGKILL,
2205                                                         pSesInfo->server->tsk);
2206                                                 tsk = pSesInfo->server->tsk;
2207                                                 if (tsk)
2208                                                         kthread_stop(tsk);
2209                                         }
2210                                 } else {
2211                                         cFYI(1, ("No session or bad tcon"));
2212                                         if ((pSesInfo->server) &&
2213                                             (pSesInfo->server->tsk)) {
2214                                                 struct task_struct *tsk;
2215                                                 force_sig(SIGKILL,
2216                                                         pSesInfo->server->tsk);
2217                                                 tsk = pSesInfo->server->tsk;
2218                                                 if (tsk)
2219                                                         kthread_stop(tsk);
2220                                         }
2221                                 }
2222                                 sesInfoFree(pSesInfo);
2223                                 /* pSesInfo = NULL; */
2224                         }
2225                 }
2226         } else {
2227                 atomic_inc(&tcon->useCount);
2228                 cifs_sb->tcon = tcon;
2229                 tcon->ses = pSesInfo;
2230
2231                 /* do not care if following two calls succeed - informational */
2232                 if (!tcon->ipc) {
2233                         CIFSSMBQFSDeviceInfo(xid, tcon);
2234                         CIFSSMBQFSAttributeInfo(xid, tcon);
2235                 }
2236
2237                 /* tell server which Unix caps we support */
2238                 if (tcon->ses->capabilities & CAP_UNIX)
2239                         /* reset of caps checks mount to see if unix extensions
2240                            disabled for just this mount */
2241                         reset_cifs_unix_caps(xid, tcon, sb, &volume_info);
2242                 else
2243                         tcon->unix_ext = 0; /* server does not support them */
2244
2245                 /* convert forward to back slashes in prepath here if needed */
2246                 convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb));
2247
2248                 if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2249                         cifs_sb->rsize = 1024 * 127;
2250                         cFYI(DBG2,
2251                                 ("no very large read support, rsize now 127K"));
2252                 }
2253                 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2254                         cifs_sb->wsize = min(cifs_sb->wsize,
2255                                              (tcon->ses->server->maxBuf -
2256                                               MAX_CIFS_HDR_SIZE));
2257                 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2258                         cifs_sb->rsize = min(cifs_sb->rsize,
2259                                              (tcon->ses->server->maxBuf -
2260                                               MAX_CIFS_HDR_SIZE));
2261         }
2262
2263         /* volume_info.password is freed above when existing session found
2264         (in which case it is not needed anymore) but when new sesion is created
2265         the password ptr is put in the new session structure (in which case the
2266         password will be freed at unmount time) */
2267 out:
2268         /* zero out password before freeing */
2269         if (volume_info.password != NULL) {
2270                 memset(volume_info.password, 0, strlen(volume_info.password));
2271                 kfree(volume_info.password);
2272         }
2273         kfree(volume_info.UNC);
2274         kfree(volume_info.prepath);
2275         FreeXid(xid);
2276         return rc;
2277 }
2278
2279 static int
2280 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2281               char session_key[CIFS_SESS_KEY_SIZE],
2282               const struct nls_table *nls_codepage)
2283 {
2284         struct smb_hdr *smb_buffer;
2285         struct smb_hdr *smb_buffer_response;
2286         SESSION_SETUP_ANDX *pSMB;
2287         SESSION_SETUP_ANDX *pSMBr;
2288         char *bcc_ptr;
2289         char *user;
2290         char *domain;
2291         int rc = 0;
2292         int remaining_words = 0;
2293         int bytes_returned = 0;
2294         int len;
2295         __u32 capabilities;
2296         __u16 count;
2297
2298         cFYI(1, ("In sesssetup"));
2299         if (ses == NULL)
2300                 return -EINVAL;
2301         user = ses->userName;
2302         domain = ses->domainName;
2303         smb_buffer = cifs_buf_get();
2304         if (smb_buffer == NULL) {
2305                 return -ENOMEM;
2306         }
2307         smb_buffer_response = smb_buffer;
2308         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2309
2310         /* send SMBsessionSetup here */
2311         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2312                         NULL /* no tCon exists yet */ , 13 /* wct */ );
2313
2314         smb_buffer->Mid = GetNextMid(ses->server);
2315         pSMB->req_no_secext.AndXCommand = 0xFF;
2316         pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2317         pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2318
2319         if (ses->server->secMode &
2320                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2321                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2322
2323         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2324                 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2325         if (ses->capabilities & CAP_UNICODE) {
2326                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2327                 capabilities |= CAP_UNICODE;
2328         }
2329         if (ses->capabilities & CAP_STATUS32) {
2330                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2331                 capabilities |= CAP_STATUS32;
2332         }
2333         if (ses->capabilities & CAP_DFS) {
2334                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2335                 capabilities |= CAP_DFS;
2336         }
2337         pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2338
2339         pSMB->req_no_secext.CaseInsensitivePasswordLength =
2340                 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2341
2342         pSMB->req_no_secext.CaseSensitivePasswordLength =
2343             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2344         bcc_ptr = pByteArea(smb_buffer);
2345         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2346         bcc_ptr += CIFS_SESS_KEY_SIZE;
2347         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2348         bcc_ptr += CIFS_SESS_KEY_SIZE;
2349
2350         if (ses->capabilities & CAP_UNICODE) {
2351                 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2352                         *bcc_ptr = 0;
2353                         bcc_ptr++;
2354                 }
2355                 if (user == NULL)
2356                         bytes_returned = 0; /* skip null user */
2357                 else
2358                         bytes_returned =
2359                                 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2360                                         nls_codepage);
2361                 /* convert number of 16 bit words to bytes */
2362                 bcc_ptr += 2 * bytes_returned;
2363                 bcc_ptr += 2;   /* trailing null */
2364                 if (domain == NULL)
2365                         bytes_returned =
2366                             cifs_strtoUCS((__le16 *) bcc_ptr,
2367                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2368                 else
2369                         bytes_returned =
2370                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2371                                           nls_codepage);
2372                 bcc_ptr += 2 * bytes_returned;
2373                 bcc_ptr += 2;
2374                 bytes_returned =
2375                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2376                                   32, nls_codepage);
2377                 bcc_ptr += 2 * bytes_returned;
2378                 bytes_returned =
2379                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release,
2380                                   32, nls_codepage);
2381                 bcc_ptr += 2 * bytes_returned;
2382                 bcc_ptr += 2;
2383                 bytes_returned =
2384                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2385                                   64, nls_codepage);
2386                 bcc_ptr += 2 * bytes_returned;
2387                 bcc_ptr += 2;
2388         } else {
2389                 if (user != NULL) {
2390                     strncpy(bcc_ptr, user, 200);
2391                     bcc_ptr += strnlen(user, 200);
2392                 }
2393                 *bcc_ptr = 0;
2394                 bcc_ptr++;
2395                 if (domain == NULL) {
2396                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2397                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2398                 } else {
2399                         strncpy(bcc_ptr, domain, 64);
2400                         bcc_ptr += strnlen(domain, 64);
2401                         *bcc_ptr = 0;
2402                         bcc_ptr++;
2403                 }
2404                 strcpy(bcc_ptr, "Linux version ");
2405                 bcc_ptr += strlen("Linux version ");
2406                 strcpy(bcc_ptr, utsname()->release);
2407                 bcc_ptr += strlen(utsname()->release) + 1;
2408                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2409                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2410         }
2411         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2412         smb_buffer->smb_buf_length += count;
2413         pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2414
2415         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2416                          &bytes_returned, CIFS_LONG_OP);
2417         if (rc) {
2418 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2419         } else if ((smb_buffer_response->WordCount == 3)
2420                    || (smb_buffer_response->WordCount == 4)) {
2421                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2422                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2423                 if (action & GUEST_LOGIN)
2424                         cFYI(1, (" Guest login")); /* BB mark SesInfo struct? */
2425                 ses->Suid = smb_buffer_response->Uid; /* UID left in wire format
2426                                                          (little endian) */
2427                 cFYI(1, ("UID = %d ", ses->Suid));
2428         /* response can have either 3 or 4 word count - Samba sends 3 */
2429                 bcc_ptr = pByteArea(smb_buffer_response);
2430                 if ((pSMBr->resp.hdr.WordCount == 3)
2431                     || ((pSMBr->resp.hdr.WordCount == 4)
2432                         && (blob_len < pSMBr->resp.ByteCount))) {
2433                         if (pSMBr->resp.hdr.WordCount == 4)
2434                                 bcc_ptr += blob_len;
2435
2436                         if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2437                                 if ((long) (bcc_ptr) % 2) {
2438                                         remaining_words =
2439                                             (BCC(smb_buffer_response) - 1) / 2;
2440                                         /* Unicode strings must be word
2441                                            aligned */
2442                                         bcc_ptr++;
2443                                 } else {
2444                                         remaining_words =
2445                                                 BCC(smb_buffer_response) / 2;
2446                                 }
2447                                 len =
2448                                     UniStrnlen((wchar_t *) bcc_ptr,
2449                                                remaining_words - 1);
2450 /* We look for obvious messed up bcc or strings in response so we do not go off
2451    the end since (at least) WIN2K and Windows XP have a major bug in not null
2452    terminating last Unicode string in response  */
2453                                 if (ses->serverOS)
2454                                         kfree(ses->serverOS);
2455                                 ses->serverOS = kzalloc(2 * (len + 1),
2456                                                         GFP_KERNEL);
2457                                 if (ses->serverOS == NULL)
2458                                         goto sesssetup_nomem;
2459                                 cifs_strfromUCS_le(ses->serverOS,
2460                                                    (__le16 *)bcc_ptr,
2461                                                    len, nls_codepage);
2462                                 bcc_ptr += 2 * (len + 1);
2463                                 remaining_words -= len + 1;
2464                                 ses->serverOS[2 * len] = 0;
2465                                 ses->serverOS[1 + (2 * len)] = 0;
2466                                 if (remaining_words > 0) {
2467                                         len = UniStrnlen((wchar_t *)bcc_ptr,
2468                                                          remaining_words-1);
2469                                         kfree(ses->serverNOS);
2470                                         ses->serverNOS = kzalloc(2 * (len + 1),
2471                                                                  GFP_KERNEL);
2472                                         if (ses->serverNOS == NULL)
2473                                                 goto sesssetup_nomem;
2474                                         cifs_strfromUCS_le(ses->serverNOS,
2475                                                            (__le16 *)bcc_ptr,
2476                                                            len, nls_codepage);
2477                                         bcc_ptr += 2 * (len + 1);
2478                                         ses->serverNOS[2 * len] = 0;
2479                                         ses->serverNOS[1 + (2 * len)] = 0;
2480                                         if (strncmp(ses->serverNOS,
2481                                                 "NT LAN Manager 4", 16) == 0) {
2482                                                 cFYI(1, ("NT4 server"));
2483                                                 ses->flags |= CIFS_SES_NT4;
2484                                         }
2485                                         remaining_words -= len + 1;
2486                                         if (remaining_words > 0) {
2487                                                 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2488                                 /* last string is not always null terminated
2489                                    (for e.g. for Windows XP & 2000) */
2490                                                 if (ses->serverDomain)
2491                                                         kfree(ses->serverDomain);
2492                                                 ses->serverDomain =
2493                                                     kzalloc(2*(len+1),
2494                                                             GFP_KERNEL);
2495                                                 if (ses->serverDomain == NULL)
2496                                                         goto sesssetup_nomem;
2497                                                 cifs_strfromUCS_le(ses->serverDomain,
2498                                                         (__le16 *)bcc_ptr,
2499                                                         len, nls_codepage);
2500                                                 bcc_ptr += 2 * (len + 1);
2501                                                 ses->serverDomain[2*len] = 0;
2502                                                 ses->serverDomain[1+(2*len)] = 0;
2503                                         } else { /* else no more room so create
2504                                                   dummy domain string */
2505                                                 if (ses->serverDomain)
2506                                                         kfree(ses->serverDomain);
2507                                                 ses->serverDomain =
2508                                                         kzalloc(2, GFP_KERNEL);
2509                                         }
2510                                 } else { /* no room so create dummy domain
2511                                             and NOS string */
2512
2513                                         /* if these kcallocs fail not much we
2514                                            can do, but better to not fail the
2515                                            sesssetup itself */
2516                                         kfree(ses->serverDomain);
2517                                         ses->serverDomain =
2518                                             kzalloc(2, GFP_KERNEL);
2519                                         kfree(ses->serverNOS);
2520                                         ses->serverNOS =
2521                                             kzalloc(2, GFP_KERNEL);
2522                                 }
2523                         } else {        /* ASCII */
2524                                 len = strnlen(bcc_ptr, 1024);
2525                                 if (((long) bcc_ptr + len) - (long)
2526                                     pByteArea(smb_buffer_response)
2527                                             <= BCC(smb_buffer_response)) {
2528                                         kfree(ses->serverOS);
2529                                         ses->serverOS = kzalloc(len + 1,
2530                                                                 GFP_KERNEL);
2531                                         if (ses->serverOS == NULL)
2532                                                 goto sesssetup_nomem;
2533                                         strncpy(ses->serverOS, bcc_ptr, len);
2534
2535                                         bcc_ptr += len;
2536                                         /* null terminate the string */
2537                                         bcc_ptr[0] = 0;
2538                                         bcc_ptr++;
2539
2540                                         len = strnlen(bcc_ptr, 1024);
2541                                         kfree(ses->serverNOS);
2542                                         ses->serverNOS = kzalloc(len + 1,
2543                                                                  GFP_KERNEL);
2544                                         if (ses->serverNOS == NULL)
2545                                                 goto sesssetup_nomem;
2546                                         strncpy(ses->serverNOS, bcc_ptr, len);
2547                                         bcc_ptr += len;
2548                                         bcc_ptr[0] = 0;
2549                                         bcc_ptr++;
2550
2551                                         len = strnlen(bcc_ptr, 1024);
2552                                         if (ses->serverDomain)
2553                                                 kfree(ses->serverDomain);
2554                                         ses->serverDomain = kzalloc(len + 1,
2555                                                                     GFP_KERNEL);
2556                                         if (ses->serverDomain == NULL)
2557                                                 goto sesssetup_nomem;
2558                                         strncpy(ses->serverDomain, bcc_ptr,
2559                                                 len);
2560                                         bcc_ptr += len;
2561                                         bcc_ptr[0] = 0;
2562                                         bcc_ptr++;
2563                                 } else
2564                                         cFYI(1,
2565                                              ("Variable field of length %d "
2566                                                 "extends beyond end of smb ",
2567                                               len));
2568                         }
2569                 } else {
2570                         cERROR(1,
2571                                (" Security Blob Length extends beyond "
2572                                 "end of SMB"));
2573                 }
2574         } else {
2575                 cERROR(1,
2576                        (" Invalid Word count %d: ",
2577                         smb_buffer_response->WordCount));
2578                 rc = -EIO;
2579         }
2580 sesssetup_nomem:        /* do not return an error on nomem for the info strings,
2581                            since that could make reconnection harder, and
2582                            reconnection might be needed to free memory */
2583         cifs_buf_release(smb_buffer);
2584
2585         return rc;
2586 }
2587
2588 static int
2589 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2590                               struct cifsSesInfo *ses, int *pNTLMv2_flag,
2591                               const struct nls_table *nls_codepage)
2592 {
2593         struct smb_hdr *smb_buffer;
2594         struct smb_hdr *smb_buffer_response;
2595         SESSION_SETUP_ANDX *pSMB;
2596         SESSION_SETUP_ANDX *pSMBr;
2597         char *bcc_ptr;
2598         char *domain;
2599         int rc = 0;
2600         int remaining_words = 0;
2601         int bytes_returned = 0;
2602         int len;
2603         int SecurityBlobLength = sizeof(NEGOTIATE_MESSAGE);
2604         PNEGOTIATE_MESSAGE SecurityBlob;
2605         PCHALLENGE_MESSAGE SecurityBlob2;
2606         __u32 negotiate_flags, capabilities;
2607         __u16 count;
2608
2609         cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
2610         if (ses == NULL)
2611                 return -EINVAL;
2612         domain = ses->domainName;
2613         *pNTLMv2_flag = FALSE;
2614         smb_buffer = cifs_buf_get();
2615         if (smb_buffer == NULL) {
2616                 return -ENOMEM;
2617         }
2618         smb_buffer_response = smb_buffer;
2619         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2620         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2621
2622         /* send SMBsessionSetup here */
2623         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2624                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2625
2626         smb_buffer->Mid = GetNextMid(ses->server);
2627         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2628         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2629
2630         pSMB->req.AndXCommand = 0xFF;
2631         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2632         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2633
2634         if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2635                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2636
2637         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2638             CAP_EXTENDED_SECURITY;
2639         if (ses->capabilities & CAP_UNICODE) {
2640                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2641                 capabilities |= CAP_UNICODE;
2642         }
2643         if (ses->capabilities & CAP_STATUS32) {
2644                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2645                 capabilities |= CAP_STATUS32;
2646         }
2647         if (ses->capabilities & CAP_DFS) {
2648                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2649                 capabilities |= CAP_DFS;
2650         }
2651         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2652
2653         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2654         SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2655         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2656         SecurityBlob->MessageType = NtLmNegotiate;
2657         negotiate_flags =
2658             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2659             NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
2660             NTLMSSP_NEGOTIATE_56 |
2661             /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2662         if (sign_CIFS_PDUs)
2663                 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2664 /*      if (ntlmv2_support)
2665                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;*/
2666         /* setup pointers to domain name and workstation name */
2667         bcc_ptr += SecurityBlobLength;
2668
2669         SecurityBlob->WorkstationName.Buffer = 0;
2670         SecurityBlob->WorkstationName.Length = 0;
2671         SecurityBlob->WorkstationName.MaximumLength = 0;
2672
2673         /* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
2674         along with username on auth request (ie the response to challenge) */
2675         SecurityBlob->DomainName.Buffer = 0;
2676         SecurityBlob->DomainName.Length = 0;
2677         SecurityBlob->DomainName.MaximumLength = 0;
2678         if (ses->capabilities & CAP_UNICODE) {
2679                 if ((long) bcc_ptr % 2) {
2680                         *bcc_ptr = 0;
2681                         bcc_ptr++;
2682                 }
2683
2684                 bytes_returned =
2685                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2686                                   32, nls_codepage);
2687                 bcc_ptr += 2 * bytes_returned;
2688                 bytes_returned =
2689                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
2690                                   nls_codepage);
2691                 bcc_ptr += 2 * bytes_returned;
2692                 bcc_ptr += 2;   /* null terminate Linux version */
2693                 bytes_returned =
2694                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2695                                   64, nls_codepage);
2696                 bcc_ptr += 2 * bytes_returned;
2697                 *(bcc_ptr + 1) = 0;
2698                 *(bcc_ptr + 2) = 0;
2699                 bcc_ptr += 2;   /* null terminate network opsys string */
2700                 *(bcc_ptr + 1) = 0;
2701                 *(bcc_ptr + 2) = 0;
2702                 bcc_ptr += 2;   /* null domain */
2703         } else {                /* ASCII */
2704                 strcpy(bcc_ptr, "Linux version ");
2705                 bcc_ptr += strlen("Linux version ");
2706                 strcpy(bcc_ptr, utsname()->release);
2707                 bcc_ptr += strlen(utsname()->release) + 1;
2708                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2709                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2710                 bcc_ptr++;      /* empty domain field */
2711                 *bcc_ptr = 0;
2712         }
2713         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2714         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2715         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2716         smb_buffer->smb_buf_length += count;
2717         pSMB->req.ByteCount = cpu_to_le16(count);
2718
2719         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2720                          &bytes_returned, CIFS_LONG_OP);
2721
2722         if (smb_buffer_response->Status.CifsError ==
2723             cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
2724                 rc = 0;
2725
2726         if (rc) {
2727 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2728         } else if ((smb_buffer_response->WordCount == 3)
2729                    || (smb_buffer_response->WordCount == 4)) {
2730                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2731                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2732
2733                 if (action & GUEST_LOGIN)
2734                         cFYI(1, (" Guest login"));
2735         /* Do we want to set anything in SesInfo struct when guest login? */
2736
2737                 bcc_ptr = pByteArea(smb_buffer_response);
2738         /* response can have either 3 or 4 word count - Samba sends 3 */
2739
2740                 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
2741                 if (SecurityBlob2->MessageType != NtLmChallenge) {
2742                         cFYI(1,
2743                              ("Unexpected NTLMSSP message type received %d",
2744                               SecurityBlob2->MessageType));
2745                 } else if (ses) {
2746                         ses->Suid = smb_buffer_response->Uid; /* UID left in le format */
2747                         cFYI(1, ("UID = %d", ses->Suid));
2748                         if ((pSMBr->resp.hdr.WordCount == 3)
2749                             || ((pSMBr->resp.hdr.WordCount == 4)
2750                                 && (blob_len <
2751                                     pSMBr->resp.ByteCount))) {
2752
2753                                 if (pSMBr->resp.hdr.WordCount == 4) {
2754                                         bcc_ptr += blob_len;
2755                                         cFYI(1, ("Security Blob Length %d",
2756                                               blob_len));
2757                                 }
2758
2759                                 cFYI(1, ("NTLMSSP Challenge rcvd"));
2760
2761                                 memcpy(ses->server->cryptKey,
2762                                        SecurityBlob2->Challenge,
2763                                        CIFS_CRYPTO_KEY_SIZE);
2764                                 if (SecurityBlob2->NegotiateFlags &
2765                                         cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
2766                                         *pNTLMv2_flag = TRUE;
2767
2768                                 if ((SecurityBlob2->NegotiateFlags &
2769                                         cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN))
2770                                         || (sign_CIFS_PDUs > 1))
2771                                                 ses->server->secMode |=
2772                                                         SECMODE_SIGN_REQUIRED;
2773                                 if ((SecurityBlob2->NegotiateFlags &
2774                                         cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
2775                                                 ses->server->secMode |=
2776                                                         SECMODE_SIGN_ENABLED;
2777
2778                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2779                                         if ((long) (bcc_ptr) % 2) {
2780                                                 remaining_words =
2781                                                     (BCC(smb_buffer_response)
2782                                                      - 1) / 2;
2783                                          /* Must word align unicode strings */
2784                                                 bcc_ptr++;
2785                                         } else {
2786                                                 remaining_words =
2787                                                     BCC
2788                                                     (smb_buffer_response) / 2;
2789                                         }
2790                                         len =
2791                                             UniStrnlen((wchar_t *) bcc_ptr,
2792                                                        remaining_words - 1);
2793 /* We look for obvious messed up bcc or strings in response so we do not go off
2794    the end since (at least) WIN2K and Windows XP have a major bug in not null
2795    terminating last Unicode string in response  */
2796                                         if (ses->serverOS)
2797                                                 kfree(ses->serverOS);
2798                                         ses->serverOS =
2799                                             kzalloc(2 * (len + 1), GFP_KERNEL);
2800                                         cifs_strfromUCS_le(ses->serverOS,
2801                                                            (__le16 *)
2802                                                            bcc_ptr, len,
2803                                                            nls_codepage);
2804                                         bcc_ptr += 2 * (len + 1);
2805                                         remaining_words -= len + 1;
2806                                         ses->serverOS[2 * len] = 0;
2807                                         ses->serverOS[1 + (2 * len)] = 0;
2808                                         if (remaining_words > 0) {
2809                                                 len = UniStrnlen((wchar_t *)
2810                                                                  bcc_ptr,
2811                                                                  remaining_words
2812                                                                  - 1);
2813                                                 kfree(ses->serverNOS);
2814                                                 ses->serverNOS =
2815                                                     kzalloc(2 * (len + 1),
2816                                                             GFP_KERNEL);
2817                                                 cifs_strfromUCS_le(ses->
2818                                                                    serverNOS,
2819                                                                    (__le16 *)
2820                                                                    bcc_ptr,
2821                                                                    len,
2822                                                                    nls_codepage);
2823                                                 bcc_ptr += 2 * (len + 1);
2824                                                 ses->serverNOS[2 * len] = 0;
2825                                                 ses->serverNOS[1 +
2826                                                                (2 * len)] = 0;
2827                                                 remaining_words -= len + 1;
2828                                                 if (remaining_words > 0) {
2829                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2830                                 /* last string not always null terminated
2831                                    (for e.g. for Windows XP & 2000) */
2832                                                         kfree(ses->serverDomain);
2833                                                         ses->serverDomain =
2834                                                             kzalloc(2 *
2835                                                                     (len +
2836                                                                      1),
2837                                                                     GFP_KERNEL);
2838                                                         cifs_strfromUCS_le
2839                                                             (ses->serverDomain,
2840                                                              (__le16 *)bcc_ptr,
2841                                                              len, nls_codepage);
2842                                                         bcc_ptr +=
2843                                                             2 * (len + 1);
2844                                                         ses->serverDomain[2*len]
2845                                                             = 0;
2846                                                         ses->serverDomain
2847                                                                 [1 + (2 * len)]
2848                                                             = 0;
2849                                                 } /* else no more room so create dummy domain string */
2850                                                 else {
2851                                                         kfree(ses->serverDomain);
2852                                                         ses->serverDomain =
2853                                                             kzalloc(2,
2854                                                                     GFP_KERNEL);
2855                                                 }
2856                                         } else {        /* no room so create dummy domain and NOS string */
2857                                                 kfree(ses->serverDomain);
2858                                                 ses->serverDomain =
2859                                                     kzalloc(2, GFP_KERNEL);
2860                                                 kfree(ses->serverNOS);
2861                                                 ses->serverNOS =
2862                                                     kzalloc(2, GFP_KERNEL);
2863                                         }
2864                                 } else {        /* ASCII */
2865                                         len = strnlen(bcc_ptr, 1024);
2866                                         if (((long) bcc_ptr + len) - (long)
2867                                             pByteArea(smb_buffer_response)
2868                                             <= BCC(smb_buffer_response)) {
2869                                                 if (ses->serverOS)
2870                                                         kfree(ses->serverOS);
2871                                                 ses->serverOS =
2872                                                     kzalloc(len + 1,
2873                                                             GFP_KERNEL);
2874                                                 strncpy(ses->serverOS,
2875                                                         bcc_ptr, len);
2876
2877                                                 bcc_ptr += len;
2878                                                 bcc_ptr[0] = 0; /* null terminate string */
2879                                                 bcc_ptr++;
2880
2881                                                 len = strnlen(bcc_ptr, 1024);
2882                                                 kfree(ses->serverNOS);
2883                                                 ses->serverNOS =
2884                                                     kzalloc(len + 1,
2885                                                             GFP_KERNEL);
2886                                                 strncpy(ses->serverNOS, bcc_ptr, len);
2887                                                 bcc_ptr += len;
2888                                                 bcc_ptr[0] = 0;
2889                                                 bcc_ptr++;
2890
2891                                                 len = strnlen(bcc_ptr, 1024);
2892                                                 kfree(ses->serverDomain);
2893                                                 ses->serverDomain =
2894                                                     kzalloc(len + 1,
2895                                                             GFP_KERNEL);
2896                                                 strncpy(ses->serverDomain,
2897                                                         bcc_ptr, len);
2898                                                 bcc_ptr += len;
2899                                                 bcc_ptr[0] = 0;
2900                                                 bcc_ptr++;
2901                                         } else
2902                                                 cFYI(1,
2903                                                      ("field of length %d "
2904                                                     "extends beyond end of smb",
2905                                                       len));
2906                                 }
2907                         } else {
2908                                 cERROR(1, ("Security Blob Length extends beyond"
2909                                            " end of SMB"));
2910                         }
2911                 } else {
2912                         cERROR(1, ("No session structure passed in."));
2913                 }
2914         } else {
2915                 cERROR(1,
2916                        (" Invalid Word count %d:",
2917                         smb_buffer_response->WordCount));
2918                 rc = -EIO;
2919         }
2920
2921         cifs_buf_release(smb_buffer);
2922
2923         return rc;
2924 }
2925 static int
2926 CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2927                         char *ntlm_session_key, int ntlmv2_flag,
2928                         const struct nls_table *nls_codepage)
2929 {
2930         struct smb_hdr *smb_buffer;
2931         struct smb_hdr *smb_buffer_response;
2932         SESSION_SETUP_ANDX *pSMB;
2933         SESSION_SETUP_ANDX *pSMBr;
2934         char *bcc_ptr;
2935         char *user;
2936         char *domain;
2937         int rc = 0;
2938         int remaining_words = 0;
2939         int bytes_returned = 0;
2940         int len;
2941         int SecurityBlobLength = sizeof(AUTHENTICATE_MESSAGE);
2942         PAUTHENTICATE_MESSAGE SecurityBlob;
2943         __u32 negotiate_flags, capabilities;
2944         __u16 count;
2945
2946         cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
2947         if (ses == NULL)
2948                 return -EINVAL;
2949         user = ses->userName;
2950         domain = ses->domainName;
2951         smb_buffer = cifs_buf_get();
2952         if (smb_buffer == NULL) {
2953                 return -ENOMEM;
2954         }
2955         smb_buffer_response = smb_buffer;
2956         pSMB = (SESSION_SETUP_ANDX *)smb_buffer;
2957         pSMBr = (SESSION_SETUP_ANDX *)smb_buffer_response;
2958
2959         /* send SMBsessionSetup here */
2960         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2961                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2962
2963         smb_buffer->Mid = GetNextMid(ses->server);
2964         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2965         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2966         pSMB->req.AndXCommand = 0xFF;
2967         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2968         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2969
2970         pSMB->req.hdr.Uid = ses->Suid;
2971
2972         if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2973                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2974
2975         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2976                         CAP_EXTENDED_SECURITY;
2977         if (ses->capabilities & CAP_UNICODE) {
2978                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2979                 capabilities |= CAP_UNICODE;
2980         }
2981         if (ses->capabilities & CAP_STATUS32) {
2982                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2983                 capabilities |= CAP_STATUS32;
2984         }
2985         if (ses->capabilities & CAP_DFS) {
2986                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2987                 capabilities |= CAP_DFS;
2988         }
2989         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2990
2991         bcc_ptr = (char *)&pSMB->req.SecurityBlob;
2992         SecurityBlob = (PAUTHENTICATE_MESSAGE)bcc_ptr;
2993         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2994         SecurityBlob->MessageType = NtLmAuthenticate;
2995         bcc_ptr += SecurityBlobLength;
2996         negotiate_flags = NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
2997                         NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
2998                         0x80000000 | NTLMSSP_NEGOTIATE_128;
2999         if (sign_CIFS_PDUs)
3000                 negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
3001         if (ntlmv2_flag)
3002                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
3003
3004 /* setup pointers to domain name and workstation name */
3005
3006         SecurityBlob->WorkstationName.Buffer = 0;
3007         SecurityBlob->WorkstationName.Length = 0;
3008         SecurityBlob->WorkstationName.MaximumLength = 0;
3009         SecurityBlob->SessionKey.Length = 0;
3010         SecurityBlob->SessionKey.MaximumLength = 0;
3011         SecurityBlob->SessionKey.Buffer = 0;
3012
3013         SecurityBlob->LmChallengeResponse.Length = 0;
3014         SecurityBlob->LmChallengeResponse.MaximumLength = 0;
3015         SecurityBlob->LmChallengeResponse.Buffer = 0;
3016
3017         SecurityBlob->NtChallengeResponse.Length =
3018             cpu_to_le16(CIFS_SESS_KEY_SIZE);
3019         SecurityBlob->NtChallengeResponse.MaximumLength =
3020             cpu_to_le16(CIFS_SESS_KEY_SIZE);
3021         memcpy(bcc_ptr, ntlm_session_key, CIFS_SESS_KEY_SIZE);
3022         SecurityBlob->NtChallengeResponse.Buffer =
3023             cpu_to_le32(SecurityBlobLength);
3024         SecurityBlobLength += CIFS_SESS_KEY_SIZE;
3025         bcc_ptr += CIFS_SESS_KEY_SIZE;
3026
3027         if (ses->capabilities & CAP_UNICODE) {
3028                 if (domain == NULL) {
3029                         SecurityBlob->DomainName.Buffer = 0;
3030                         SecurityBlob->DomainName.Length = 0;
3031                         SecurityBlob->DomainName.MaximumLength = 0;
3032                 } else {
3033                         __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
3034                                           nls_codepage);
3035                         ln *= 2;
3036                         SecurityBlob->DomainName.MaximumLength =
3037                             cpu_to_le16(ln);
3038                         SecurityBlob->DomainName.Buffer =
3039                             cpu_to_le32(SecurityBlobLength);
3040                         bcc_ptr += ln;
3041                         SecurityBlobLength += ln;
3042                         SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3043                 }
3044                 if (user == NULL) {
3045                         SecurityBlob->UserName.Buffer = 0;
3046                         SecurityBlob->UserName.Length = 0;
3047                         SecurityBlob->UserName.MaximumLength = 0;
3048                 } else {
3049                         __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
3050                                           nls_codepage);
3051                         ln *= 2;
3052                         SecurityBlob->UserName.MaximumLength =
3053                             cpu_to_le16(ln);
3054                         SecurityBlob->UserName.Buffer =
3055                             cpu_to_le32(SecurityBlobLength);
3056                         bcc_ptr += ln;
3057                         SecurityBlobLength += ln;
3058                         SecurityBlob->UserName.Length = cpu_to_le16(ln);
3059                 }
3060
3061                 /* SecurityBlob->WorkstationName.Length =
3062                  cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
3063                    SecurityBlob->WorkstationName.Length *= 2;
3064                    SecurityBlob->WorkstationName.MaximumLength =
3065                         cpu_to_le16(SecurityBlob->WorkstationName.Length);
3066                    SecurityBlob->WorkstationName.Buffer =
3067                                  cpu_to_le32(SecurityBlobLength);
3068                    bcc_ptr += SecurityBlob->WorkstationName.Length;
3069                    SecurityBlobLength += SecurityBlob->WorkstationName.Length;
3070                    SecurityBlob->WorkstationName.Length =
3071                         cpu_to_le16(SecurityBlob->WorkstationName.Length);  */
3072
3073                 if ((long) bcc_ptr % 2) {
3074                         *bcc_ptr = 0;
3075                         bcc_ptr++;
3076                 }
3077                 bytes_returned =
3078                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
3079                                   32, nls_codepage);
3080                 bcc_ptr += 2 * bytes_returned;
3081                 bytes_returned =
3082                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
3083                                   nls_codepage);
3084                 bcc_ptr += 2 * bytes_returned;
3085                 bcc_ptr += 2;   /* null term version string */
3086                 bytes_returned =
3087                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
3088                                   64, nls_codepage);
3089                 bcc_ptr += 2 * bytes_returned;
3090                 *(bcc_ptr + 1) = 0;
3091                 *(bcc_ptr + 2) = 0;
3092                 bcc_ptr += 2;   /* null terminate network opsys string */
3093                 *(bcc_ptr + 1) = 0;
3094                 *(bcc_ptr + 2) = 0;
3095                 bcc_ptr += 2;   /* null domain */
3096         } else {                /* ASCII */
3097                 if (domain == NULL) {
3098                         SecurityBlob->DomainName.Buffer = 0;
3099                         SecurityBlob->DomainName.Length = 0;
3100                         SecurityBlob->DomainName.MaximumLength = 0;
3101                 } else {
3102                         __u16 ln;
3103                         negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
3104                         strncpy(bcc_ptr, domain, 63);
3105                         ln = strnlen(domain, 64);
3106                         SecurityBlob->DomainName.MaximumLength =
3107                             cpu_to_le16(ln);
3108                         SecurityBlob->DomainName.Buffer =
3109                             cpu_to_le32(SecurityBlobLength);
3110                         bcc_ptr += ln;
3111                         SecurityBlobLength += ln;
3112                         SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3113                 }
3114                 if (user == NULL) {
3115                         SecurityBlob->UserName.Buffer = 0;
3116                         SecurityBlob->UserName.Length = 0;
3117                         SecurityBlob->UserName.MaximumLength = 0;
3118                 } else {
3119                         __u16 ln;
3120                         strncpy(bcc_ptr, user, 63);
3121                         ln = strnlen(user, 64);
3122                         SecurityBlob->UserName.MaximumLength = cpu_to_le16(ln);
3123                         SecurityBlob->UserName.Buffer =
3124                                                 cpu_to_le32(SecurityBlobLength);
3125                         bcc_ptr += ln;
3126                         SecurityBlobLength += ln;
3127                         SecurityBlob->UserName.Length = cpu_to_le16(ln);
3128                 }
3129                 /* BB fill in our workstation name if known BB */
3130
3131                 strcpy(bcc_ptr, "Linux version ");
3132                 bcc_ptr += strlen("Linux version ");
3133                 strcpy(bcc_ptr, utsname()->release);
3134                 bcc_ptr += strlen(utsname()->release) + 1;
3135                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
3136                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
3137                 bcc_ptr++;      /* null domain */
3138                 *bcc_ptr = 0;
3139         }
3140         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
3141         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
3142         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
3143         smb_buffer->smb_buf_length += count;
3144         pSMB->req.ByteCount = cpu_to_le16(count);
3145
3146         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
3147                          &bytes_returned, CIFS_LONG_OP);
3148         if (rc) {
3149 /*   rc = map_smb_to_linux_error(smb_buffer_response) done in SendReceive now */
3150         } else if ((smb_buffer_response->WordCount == 3) ||
3151                    (smb_buffer_response->WordCount == 4)) {
3152                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
3153                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
3154                 if (action & GUEST_LOGIN)
3155                         cFYI(1, (" Guest login")); /* BB Should we set anything
3156                                                          in SesInfo struct ? */
3157 /*              if (SecurityBlob2->MessageType != NtLm??) {
3158                         cFYI("Unexpected message type on auth response is %d"));
3159                 } */
3160
3161                 if (ses) {
3162                         cFYI(1,
3163                              ("Check challenge UID %d vs auth response UID %d",
3164                               ses->Suid, smb_buffer_response->Uid));
3165                         /* UID left in wire format */
3166                         ses->Suid = smb_buffer_response->Uid;
3167                         bcc_ptr = pByteArea(smb_buffer_response);
3168                 /* response can have either 3 or 4 word count - Samba sends 3 */
3169                         if ((pSMBr->resp.hdr.WordCount == 3)
3170                             || ((pSMBr->resp.hdr.WordCount == 4)
3171                                 && (blob_len <
3172                                     pSMBr->resp.ByteCount))) {
3173                                 if (pSMBr->resp.hdr.WordCount == 4) {
3174                                         bcc_ptr +=
3175                                             blob_len;
3176                                         cFYI(1,
3177                                              ("Security Blob Length %d ",
3178                                               blob_len));
3179                                 }
3180
3181                                 cFYI(1,
3182                                      ("NTLMSSP response to Authenticate "));
3183
3184                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3185                                         if ((long) (bcc_ptr) % 2) {
3186                                                 remaining_words =
3187                                                     (BCC(smb_buffer_response)
3188                                                      - 1) / 2;
3189                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
3190                                         } else {
3191                                                 remaining_words = BCC(smb_buffer_response) / 2;
3192                                         }
3193                                         len = UniStrnlen((wchar_t *) bcc_ptr,
3194                                                         remaining_words - 1);
3195 /* We look for obvious messed up bcc or strings in response so we do not go off
3196   the end since (at least) WIN2K and Windows XP have a major bug in not null
3197   terminating last Unicode string in response  */
3198                                         if (ses->serverOS)
3199                                                 kfree(ses->serverOS);
3200                                         ses->serverOS =
3201                                             kzalloc(2 * (len + 1), GFP_KERNEL);
3202                                         cifs_strfromUCS_le(ses->serverOS,
3203                                                            (__le16 *)
3204                                                            bcc_ptr, len,
3205                                                            nls_codepage);
3206                                         bcc_ptr += 2 * (len + 1);
3207                                         remaining_words -= len + 1;
3208                                         ses->serverOS[2 * len] = 0;
3209                                         ses->serverOS[1 + (2 * len)] = 0;
3210                                         if (remaining_words > 0) {
3211                                                 len = UniStrnlen((wchar_t *)
3212                                                                  bcc_ptr,
3213                                                                  remaining_words
3214                                                                  - 1);
3215                                                 kfree(ses->serverNOS);
3216                                                 ses->serverNOS =
3217                                                     kzalloc(2 * (len + 1),
3218                                                             GFP_KERNEL);
3219                                                 cifs_strfromUCS_le(ses->
3220                                                                    serverNOS,
3221                                                                    (__le16 *)
3222                                                                    bcc_ptr,
3223                                                                    len,
3224                                                                    nls_codepage);
3225                                                 bcc_ptr += 2 * (len + 1);
3226                                                 ses->serverNOS[2 * len] = 0;
3227                                                 ses->serverNOS[1+(2*len)] = 0;
3228                                                 remaining_words -= len + 1;
3229                                                 if (remaining_words > 0) {
3230                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3231      /* last string not always null terminated (e.g. for Windows XP & 2000) */
3232                                                         if (ses->serverDomain)
3233                                                                 kfree(ses->serverDomain);
3234                                                         ses->serverDomain =
3235                                                             kzalloc(2 *
3236                                                                     (len +
3237                                                                      1),
3238                                                                     GFP_KERNEL);
3239                                                         cifs_strfromUCS_le
3240                                                             (ses->
3241                                                              serverDomain,
3242                                                              (__le16 *)
3243                                                              bcc_ptr, len,
3244                                                              nls_codepage);
3245                                                         bcc_ptr +=
3246                                                             2 * (len + 1);
3247                                                         ses->
3248                                                             serverDomain[2
3249                                                                          * len]
3250                                                             = 0;
3251                                                         ses->
3252                                                             serverDomain[1
3253                                                                          +
3254                                                                          (2
3255                                                                           *
3256                                                                           len)]
3257                                                             = 0;
3258                                                 } /* else no more room so create dummy domain string */
3259                                                 else {
3260                                                         if (ses->serverDomain)
3261                                                                 kfree(ses->serverDomain);
3262                                                         ses->serverDomain = kzalloc(2,GFP_KERNEL);
3263                                                 }
3264                                         } else {  /* no room so create dummy domain and NOS string */
3265                                                 if (ses->serverDomain)
3266                                                         kfree(ses->serverDomain);
3267                                                 ses->serverDomain = kzalloc(2, GFP_KERNEL);
3268                                                 kfree(ses->serverNOS);
3269                                                 ses->serverNOS = kzalloc(2, GFP_KERNEL);
3270                                         }
3271                                 } else {        /* ASCII */
3272                                         len = strnlen(bcc_ptr, 1024);
3273                                         if (((long) bcc_ptr + len) -
3274                                            (long) pByteArea(smb_buffer_response)
3275                                                 <= BCC(smb_buffer_response)) {
3276                                                 if (ses->serverOS)
3277                                                         kfree(ses->serverOS);
3278                                                 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
3279                                                 strncpy(ses->serverOS,bcc_ptr, len);
3280
3281                                                 bcc_ptr += len;
3282                                                 bcc_ptr[0] = 0; /* null terminate the string */
3283                                                 bcc_ptr++;
3284
3285                                                 len = strnlen(bcc_ptr, 1024);
3286                                                 kfree(ses->serverNOS);
3287                                                 ses->serverNOS = kzalloc(len+1,
3288                                                                     GFP_KERNEL);
3289                                                 strncpy(ses->serverNOS,
3290                                                         bcc_ptr, len);
3291                                                 bcc_ptr += len;
3292                                                 bcc_ptr[0] = 0;
3293                                                 bcc_ptr++;
3294
3295                                                 len = strnlen(bcc_ptr, 1024);
3296                                                 if (ses->serverDomain)
3297                                                         kfree(ses->serverDomain);
3298                                                 ses->serverDomain =
3299                                                                 kzalloc(len+1,
3300                                                                     GFP_KERNEL);
3301                                                 strncpy(ses->serverDomain,
3302                                                         bcc_ptr, len);
3303                                                 bcc_ptr += len;
3304                                                 bcc_ptr[0] = 0;
3305                                                 bcc_ptr++;
3306                                         } else
3307                                                 cFYI(1, ("field of length %d "
3308                                                    "extends beyond end of smb ",
3309                                                       len));
3310                                 }
3311                         } else {
3312                                 cERROR(1, ("Security Blob extends beyond end "
3313                                         "of SMB"));
3314                         }
3315                 } else {
3316                         cERROR(1, ("No session structure passed in."));
3317                 }
3318         } else {
3319                 cERROR(1, ("Invalid Word count %d: ",
3320                         smb_buffer_response->WordCount));
3321                 rc = -EIO;
3322         }
3323
3324         cifs_buf_release(smb_buffer);
3325
3326         return rc;
3327 }
3328
3329 int
3330 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
3331          const char *tree, struct cifsTconInfo *tcon,
3332          const struct nls_table *nls_codepage)
3333 {
3334         struct smb_hdr *smb_buffer;
3335         struct smb_hdr *smb_buffer_response;
3336         TCONX_REQ *pSMB;
3337         TCONX_RSP *pSMBr;
3338         unsigned char *bcc_ptr;
3339         int rc = 0;
3340         int length;
3341         __u16 count;
3342
3343         if (ses == NULL)
3344                 return -EIO;
3345
3346         smb_buffer = cifs_buf_get();
3347         if (smb_buffer == NULL) {
3348                 return -ENOMEM;
3349         }
3350         smb_buffer_response = smb_buffer;
3351
3352         header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3353                         NULL /*no tid */ , 4 /*wct */ );
3354
3355         smb_buffer->Mid = GetNextMid(ses->server);
3356         smb_buffer->Uid = ses->Suid;
3357         pSMB = (TCONX_REQ *) smb_buffer;
3358         pSMBr = (TCONX_RSP *) smb_buffer_response;
3359
3360         pSMB->AndXCommand = 0xFF;
3361         pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3362         bcc_ptr = &pSMB->Password[0];
3363         if ((ses->server->secMode) & SECMODE_USER) {
3364                 pSMB->PasswordLength = cpu_to_le16(1);  /* minimum */
3365                 *bcc_ptr = 0; /* password is null byte */
3366                 bcc_ptr++;              /* skip password */
3367                 /* already aligned so no need to do it below */
3368         } else {
3369                 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
3370                 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3371                    specified as required (when that support is added to
3372                    the vfs in the future) as only NTLM or the much
3373                    weaker LANMAN (which we do not send by default) is accepted
3374                    by Samba (not sure whether other servers allow
3375                    NTLMv2 password here) */
3376 #ifdef CONFIG_CIFS_WEAK_PW_HASH
3377                 if ((extended_security & CIFSSEC_MAY_LANMAN) &&
3378                         (ses->server->secType == LANMAN))
3379                         calc_lanman_hash(ses, bcc_ptr);
3380                 else
3381 #endif /* CIFS_WEAK_PW_HASH */
3382                 SMBNTencrypt(ses->password,
3383                              ses->server->cryptKey,
3384                              bcc_ptr);
3385
3386                 bcc_ptr += CIFS_SESS_KEY_SIZE;
3387                 if (ses->capabilities & CAP_UNICODE) {
3388                         /* must align unicode strings */
3389                         *bcc_ptr = 0; /* null byte password */
3390                         bcc_ptr++;
3391                 }
3392         }
3393
3394         if (ses->server->secMode &
3395                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3396                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3397
3398         if (ses->capabilities & CAP_STATUS32) {
3399                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3400         }
3401         if (ses->capabilities & CAP_DFS) {
3402                 smb_buffer->Flags2 |= SMBFLG2_DFS;
3403         }
3404         if (ses->capabilities & CAP_UNICODE) {
3405                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3406                 length =
3407                     cifs_strtoUCS((__le16 *) bcc_ptr, tree,
3408                         6 /* max utf8 char length in bytes */ *
3409                         (/* server len*/ + 256 /* share len */), nls_codepage);
3410                 bcc_ptr += 2 * length;  /* convert num 16 bit words to bytes */
3411                 bcc_ptr += 2;   /* skip trailing null */
3412         } else {                /* ASCII */
3413                 strcpy(bcc_ptr, tree);
3414                 bcc_ptr += strlen(tree) + 1;
3415         }
3416         strcpy(bcc_ptr, "?????");
3417         bcc_ptr += strlen("?????");
3418         bcc_ptr += 1;
3419         count = bcc_ptr - &pSMB->Password[0];
3420         pSMB->hdr.smb_buf_length += count;
3421         pSMB->ByteCount = cpu_to_le16(count);
3422
3423         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
3424                          CIFS_STD_OP);
3425
3426         /* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
3427         /* above now done in SendReceive */
3428         if ((rc == 0) && (tcon != NULL)) {
3429                 tcon->tidStatus = CifsGood;
3430                 tcon->tid = smb_buffer_response->Tid;
3431                 bcc_ptr = pByteArea(smb_buffer_response);
3432                 length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
3433                 /* skip service field (NB: this field is always ASCII) */
3434                 if (length == 3) {
3435                         if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3436                             (bcc_ptr[2] == 'C')) {
3437                                 cFYI(1, ("IPC connection"));
3438                                 tcon->ipc = 1;
3439                         }
3440                 } else if (length == 2) {
3441                         if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3442                                 /* the most common case */
3443                                 cFYI(1, ("disk share connection"));
3444                         }
3445                 }
3446                 bcc_ptr += length + 1;
3447                 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3448                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3449                         length = UniStrnlen((wchar_t *) bcc_ptr, 512);
3450                         if ((bcc_ptr + (2 * length)) -
3451                              pByteArea(smb_buffer_response) <=
3452                             BCC(smb_buffer_response)) {
3453                                 kfree(tcon->nativeFileSystem);
3454                                 tcon->nativeFileSystem =
3455                                     kzalloc(length + 2, GFP_KERNEL);
3456                                 if (tcon->nativeFileSystem)
3457                                         cifs_strfromUCS_le(
3458                                                 tcon->nativeFileSystem,
3459                                                 (__le16 *) bcc_ptr,
3460                                                 length, nls_codepage);
3461                                 bcc_ptr += 2 * length;
3462                                 bcc_ptr[0] = 0; /* null terminate the string */
3463                                 bcc_ptr[1] = 0;
3464                                 bcc_ptr += 2;
3465                         }
3466                         /* else do not bother copying these information fields*/
3467                 } else {
3468                         length = strnlen(bcc_ptr, 1024);
3469                         if ((bcc_ptr + length) -
3470                             pByteArea(smb_buffer_response) <=
3471                             BCC(smb_buffer_response)) {
3472                                 kfree(tcon->nativeFileSystem);
3473                                 tcon->nativeFileSystem =
3474                                     kzalloc(length + 1, GFP_KERNEL);
3475                                 if (tcon->nativeFileSystem)
3476                                         strncpy(tcon->nativeFileSystem, bcc_ptr,
3477                                                 length);
3478                         }
3479                         /* else do not bother copying these information fields*/
3480                 }
3481                 if ((smb_buffer_response->WordCount == 3) ||
3482                          (smb_buffer_response->WordCount == 7))
3483                         /* field is in same location */
3484                         tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3485                 else
3486                         tcon->Flags = 0;
3487                 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
3488         } else if ((rc == 0) && tcon == NULL) {
3489                 /* all we need to save for IPC$ connection */
3490                 ses->ipc_tid = smb_buffer_response->Tid;
3491         }
3492
3493         cifs_buf_release(smb_buffer);
3494         return rc;
3495 }
3496
3497 int
3498 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3499 {
3500         int rc = 0;
3501         int xid;
3502         struct cifsSesInfo *ses = NULL;
3503         struct task_struct *cifsd_task;
3504         char *tmp;
3505
3506         xid = GetXid();
3507
3508         if (cifs_sb->tcon) {
3509                 ses = cifs_sb->tcon->ses; /* save ptr to ses before delete tcon!*/
3510                 rc = CIFSSMBTDis(xid, cifs_sb->tcon);
3511                 if (rc == -EBUSY) {
3512                         FreeXid(xid);
3513                         return 0;
3514                 }
3515                 tconInfoFree(cifs_sb->tcon);
3516                 if ((ses) && (ses->server)) {
3517                         /* save off task so we do not refer to ses later */
3518                         cifsd_task = ses->server->tsk;
3519                         cFYI(1, ("About to do SMBLogoff "));
3520                         rc = CIFSSMBLogoff(xid, ses);
3521                         if (rc == -EBUSY) {
3522                                 FreeXid(xid);
3523                                 return 0;
3524                         } else if (rc == -ESHUTDOWN) {
3525                                 cFYI(1, ("Waking up socket by sending signal"));
3526                                 if (cifsd_task) {
3527                                         force_sig(SIGKILL, cifsd_task);
3528                                         kthread_stop(cifsd_task);
3529                                 }
3530                                 rc = 0;
3531                         } /* else - we have an smb session
3532                                 left on this socket do not kill cifsd */
3533                 } else
3534                         cFYI(1, ("No session or bad tcon"));
3535         }
3536
3537         cifs_sb->tcon = NULL;
3538         tmp = cifs_sb->prepath;
3539         cifs_sb->prepathlen = 0;
3540         cifs_sb->prepath = NULL;
3541         kfree(tmp);
3542         if (ses)
3543                 schedule_timeout_interruptible(msecs_to_jiffies(500));
3544         if (ses)
3545                 sesInfoFree(ses);
3546
3547         FreeXid(xid);
3548         return rc;
3549 }
3550
3551 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3552                                            struct nls_table *nls_info)
3553 {
3554         int rc = 0;
3555         char ntlm_session_key[CIFS_SESS_KEY_SIZE];
3556         int ntlmv2_flag = FALSE;
3557         int first_time = 0;
3558
3559         /* what if server changes its buffer size after dropping the session? */
3560         if (pSesInfo->server->maxBuf == 0) /* no need to send on reconnect */ {
3561                 rc = CIFSSMBNegotiate(xid, pSesInfo);
3562                 if (rc == -EAGAIN) /* retry only once on 1st time connection */ {
3563                         rc = CIFSSMBNegotiate(xid, pSesInfo);
3564                         if (rc == -EAGAIN)
3565                                 rc = -EHOSTDOWN;
3566                 }
3567                 if (rc == 0) {
3568                         spin_lock(&GlobalMid_Lock);
3569                         if (pSesInfo->server->tcpStatus != CifsExiting)
3570                                 pSesInfo->server->tcpStatus = CifsGood;
3571                         else
3572                                 rc = -EHOSTDOWN;
3573                         spin_unlock(&GlobalMid_Lock);
3574
3575                 }
3576                 first_time = 1;
3577         }
3578         if (!rc) {
3579                 pSesInfo->flags = 0;
3580                 pSesInfo->capabilities = pSesInfo->server->capabilities;
3581                 if (linuxExtEnabled == 0)
3582                         pSesInfo->capabilities &= (~CAP_UNIX);
3583         /*      pSesInfo->sequence_number = 0;*/
3584                 cFYI(1,
3585                       ("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3586                         pSesInfo->server->secMode,
3587                         pSesInfo->server->capabilities,
3588                         pSesInfo->server->timeAdj));
3589                 if (experimEnabled < 2)
3590                         rc = CIFS_SessSetup(xid, pSesInfo,
3591                                             first_time, nls_info);
3592                 else if (extended_security
3593                                 && (pSesInfo->capabilities
3594                                         & CAP_EXTENDED_SECURITY)
3595                                 && (pSesInfo->server->secType == NTLMSSP)) {
3596                         rc = -EOPNOTSUPP;
3597                 } else if (extended_security
3598                            && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3599                            && (pSesInfo->server->secType == RawNTLMSSP)) {
3600                         cFYI(1, ("NTLMSSP sesssetup"));
3601                         rc = CIFSNTLMSSPNegotiateSessSetup(xid,
3602                                                 pSesInfo,
3603                                                 &ntlmv2_flag,
3604                                                 nls_info);
3605                         if (!rc) {
3606                                 if (ntlmv2_flag) {
3607                                         char *v2_response;
3608                                         cFYI(1, ("more secure NTLM ver2 hash"));
3609                                         if (CalcNTLMv2_partial_mac_key(pSesInfo,
3610                                                 nls_info)) {
3611                                                 rc = -ENOMEM;
3612                                                 goto ss_err_exit;
3613                                         } else
3614                                                 v2_response = kmalloc(16 + 64 /* blob */, GFP_KERNEL);
3615                                         if (v2_response) {
3616                                                 CalcNTLMv2_response(pSesInfo,
3617                                                                    v2_response);
3618                                 /*              if (first_time)
3619                                                   cifs_calculate_ntlmv2_mac_key(
3620                                                    pSesInfo->server->mac_signing_key,
3621                                                    response, ntlm_session_key,*/
3622                                                 kfree(v2_response);
3623                                         /* BB Put dummy sig in SessSetup PDU? */
3624                                         } else {
3625                                                 rc = -ENOMEM;
3626                                                 goto ss_err_exit;
3627                                         }
3628
3629                                 } else {
3630                                         SMBNTencrypt(pSesInfo->password,
3631                                                 pSesInfo->server->cryptKey,
3632                                                 ntlm_session_key);
3633
3634                                         if (first_time)
3635                                                 cifs_calculate_mac_key(
3636                                                         &pSesInfo->server->mac_signing_key,
3637                                                         ntlm_session_key,
3638                                                         pSesInfo->password);
3639                                 }
3640                         /* for better security the weaker lanman hash not sent
3641                            in AuthSessSetup so we no longer calculate it */
3642
3643                                 rc = CIFSNTLMSSPAuthSessSetup(xid,
3644                                         pSesInfo,
3645                                         ntlm_session_key,
3646                                         ntlmv2_flag,
3647                                         nls_info);
3648                         }
3649                 } else { /* old style NTLM 0.12 session setup */
3650                         SMBNTencrypt(pSesInfo->password,
3651                                 pSesInfo->server->cryptKey,
3652                                 ntlm_session_key);
3653
3654                         if (first_time)
3655                                 cifs_calculate_mac_key(
3656                                         &pSesInfo->server->mac_signing_key,
3657                                         ntlm_session_key, pSesInfo->password);
3658
3659                         rc = CIFSSessSetup(xid, pSesInfo,
3660                                 ntlm_session_key, nls_info);
3661                 }
3662                 if (rc) {
3663                         cERROR(1, ("Send error in SessSetup = %d", rc));
3664                 } else {
3665                         cFYI(1, ("CIFS Session Established successfully"));
3666                         pSesInfo->status = CifsGood;
3667                 }
3668         }
3669 ss_err_exit:
3670         return rc;
3671 }
3672