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 extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
  53                          unsigned char *p24);
  54
  55 extern mempool_t *cifs_req_poolp;
  56
  57 struct smb_vol {
  58         char *username;
  59         char *password;
  60         char *domainname;
  61         char *UNC;
  62         char *UNCip;
  63         char *in6_addr;  /* ipv6 address as human readable form of in6_addr */
  64         char *iocharset;  /* local code page for mapping to and from Unicode */
  65         char source_rfc1001_name[16]; /* netbios name of client */
  66         char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
  67         uid_t linux_uid;
  68         gid_t linux_gid;
  69         mode_t file_mode;
  70         mode_t dir_mode;
  71         unsigned secFlg;
  72         bool rw:1;
  73         bool retry:1;
  74         bool intr:1;
  75         bool setuids:1;
  76         bool override_uid:1;
  77         bool override_gid:1;
  78         bool dynperm:1;
  79         bool noperm:1;
  80         bool no_psx_acl:1; /* set if posix acl support should be disabled */
  81         bool cifs_acl:1;
  82         bool no_xattr:1;   /* set if xattr (EA) support should be disabled*/
  83         bool server_ino:1; /* use inode numbers from server ie UniqueId */
  84         bool direct_io:1;
  85         bool remap:1;     /* set to remap seven reserved chars in filenames */
  86         bool posix_paths:1;   /* unset to not ask for posix pathnames. */
  87         bool no_linux_ext:1;
  88         bool sfu_emul:1;
  89         bool nullauth:1; /* attempt to authenticate with null user */
  90         unsigned nocase;     /* request case insensitive filenames */
  91         unsigned nobrl;      /* disable sending byte range locks to srv */
  92         unsigned int rsize;
  93         unsigned int wsize;
  94         unsigned int sockopt;
  95         unsigned short int port;
  96         char *prepath;
  97 };
  98
  99 static int ipv4_connect(struct sockaddr_in *psin_server,
 100                         struct socket **csocket,
 101                         char *netb_name,
 102                         char *server_netb_name);
 103 static int ipv6_connect(struct sockaddr_in6 *psin_server,
 104                         struct socket **csocket);
 105
 106
 107         /*
 108          * cifs tcp session reconnection
 109          *
 110          * mark tcp session as reconnecting so temporarily locked
 111          * mark all smb sessions as reconnecting for tcp session
 112          * reconnect tcp session
 113          * wake up waiters on reconnection? - (not needed currently)
 114          */
 115
 116 static int
 117 cifs_reconnect(struct TCP_Server_Info *server)
 118 {
 119         int rc = 0;
 120         struct list_head *tmp;
 121         struct cifsSesInfo *ses;
 122         struct cifsTconInfo *tcon;
 123         struct mid_q_entry *mid_entry;
 124
 125         spin_lock(&GlobalMid_Lock);
 126         if (kthread_should_stop()) {
 127                 /* the demux thread will exit normally
 128                 next time through the loop */
 129                 spin_unlock(&GlobalMid_Lock);
 130                 return rc;
 131         } else
 132                 server->tcpStatus = CifsNeedReconnect;
 133         spin_unlock(&GlobalMid_Lock);
 134         server->maxBuf = 0;
 135
 136         cFYI(1, ("Reconnecting tcp session"));
 137
 138         /* before reconnecting the tcp session, mark the smb session (uid)
 139                 and the tid bad so they are not used until reconnected */
 140         read_lock(&GlobalSMBSeslock);
 141         list_for_each(tmp, &GlobalSMBSessionList) {
 142                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
 143                 if (ses->server) {
 144                         if (ses->server == server) {
 145                                 ses->status = CifsNeedReconnect;
 146                                 ses->ipc_tid = 0;
 147                         }
 148                 }
 149                 /* else tcp and smb sessions need reconnection */
 150         }
 151         list_for_each(tmp, &GlobalTreeConnectionList) {
 152                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
 153                 if ((tcon) && (tcon->ses) && (tcon->ses->server == server))
 154                         tcon->tidStatus = CifsNeedReconnect;
 155         }
 156         read_unlock(&GlobalSMBSeslock);
 157         /* do not want to be sending data on a socket we are freeing */
 158         down(&server->tcpSem);
 159         if (server->ssocket) {
 160                 cFYI(1, ("State: 0x%x Flags: 0x%lx", server->ssocket->state,
 161                         server->ssocket->flags));
 162                 kernel_sock_shutdown(server->ssocket, SHUT_WR);
 163                 cFYI(1, ("Post shutdown state: 0x%x Flags: 0x%lx",
 164                         server->ssocket->state,
 165                         server->ssocket->flags));
 166                 sock_release(server->ssocket);
 167                 server->ssocket = NULL;
 168         }
 169
 170         spin_lock(&GlobalMid_Lock);
 171         list_for_each(tmp, &server->pending_mid_q) {
 172                 mid_entry = list_entry(tmp, struct
 173                                         mid_q_entry,
 174                                         qhead);
 175                 if (mid_entry) {
 176                         if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
 177                                 /* Mark other intransit requests as needing
 178                                    retry so we do not immediately mark the
 179                                    session bad again (ie after we reconnect
 180                                    below) as they timeout too */
 181                                 mid_entry->midState = MID_RETRY_NEEDED;
 182                         }
 183                 }
 184         }
 185         spin_unlock(&GlobalMid_Lock);
 186         up(&server->tcpSem);
 187
 188         while ((!kthread_should_stop()) && (server->tcpStatus != CifsGood)) {
 189                 try_to_freeze();
 190                 if (server->protocolType == IPV6) {
 191                         rc = ipv6_connect(&server->addr.sockAddr6,
 192                                           &server->ssocket);
 193                 } else {
 194                         rc = ipv4_connect(&server->addr.sockAddr,
 195                                         &server->ssocket,
 196                                         server->workstation_RFC1001_name,
 197                                         server->server_RFC1001_name);
 198                 }
 199                 if (rc) {
 200                         cFYI(1, ("reconnect error %d", rc));
 201                         msleep(3000);
 202                 } else {
 203                         atomic_inc(&tcpSesReconnectCount);
 204                         spin_lock(&GlobalMid_Lock);
 205                         if (!kthread_should_stop())
 206                                 server->tcpStatus = CifsGood;
 207                         server->sequence_number = 0;
 208                         spin_unlock(&GlobalMid_Lock);
 209         /*              atomic_set(&server->inFlight,0);*/
 210                         wake_up(&server->response_q);
 211                 }
 212         }
 213         return rc;
 214 }
 215
 216 /*
 217         return codes:
 218                 0       not a transact2, or all data present
 219                 >0      transact2 with that much data missing
 220                 -EINVAL = invalid transact2
 221
 222  */
 223 static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
 224 {
 225         struct smb_t2_rsp *pSMBt;
 226         int total_data_size;
 227         int data_in_this_rsp;
 228         int remaining;
 229
 230         if (pSMB->Command != SMB_COM_TRANSACTION2)
 231                 return 0;
 232
 233         /* check for plausible wct, bcc and t2 data and parm sizes */
 234         /* check for parm and data offset going beyond end of smb */
 235         if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
 236                 cFYI(1, ("invalid transact2 word count"));
 237                 return -EINVAL;
 238         }
 239
 240         pSMBt = (struct smb_t2_rsp *)pSMB;
 241
 242         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 243         data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 244
 245         remaining = total_data_size - data_in_this_rsp;
 246
 247         if (remaining == 0)
 248                 return 0;
 249         else if (remaining < 0) {
 250                 cFYI(1, ("total data %d smaller than data in frame %d",
 251                         total_data_size, data_in_this_rsp));
 252                 return -EINVAL;
 253         } else {
 254                 cFYI(1, ("missing %d bytes from transact2, check next response",
 255                         remaining));
 256                 if (total_data_size > maxBufSize) {
 257                         cERROR(1, ("TotalDataSize %d is over maximum buffer %d",
 258                                 total_data_size, maxBufSize));
 259                         return -EINVAL;
 260                 }
 261                 return remaining;
 262         }
 263 }
 264
 265 static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
 266 {
 267         struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
 268         struct smb_t2_rsp *pSMBt  = (struct smb_t2_rsp *)pTargetSMB;
 269         int total_data_size;
 270         int total_in_buf;
 271         int remaining;
 272         int total_in_buf2;
 273         char *data_area_of_target;
 274         char *data_area_of_buf2;
 275         __u16 byte_count;
 276
 277         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 278
 279         if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
 280                 cFYI(1, ("total data size of primary and secondary t2 differ"));
 281         }
 282
 283         total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 284
 285         remaining = total_data_size - total_in_buf;
 286
 287         if (remaining < 0)
 288                 return -EINVAL;
 289
 290         if (remaining == 0) /* nothing to do, ignore */
 291                 return 0;
 292
 293         total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
 294         if (remaining < total_in_buf2) {
 295                 cFYI(1, ("transact2 2nd response contains too much data"));
 296         }
 297
 298         /* find end of first SMB data area */
 299         data_area_of_target = (char *)&pSMBt->hdr.Protocol +
 300                                 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
 301         /* validate target area */
 302
 303         data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
 304                                         le16_to_cpu(pSMB2->t2_rsp.DataOffset);
 305
 306         data_area_of_target += total_in_buf;
 307
 308         /* copy second buffer into end of first buffer */
 309         memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2);
 310         total_in_buf += total_in_buf2;
 311         pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
 312         byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
 313         byte_count += total_in_buf2;
 314         BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
 315
 316         byte_count = pTargetSMB->smb_buf_length;
 317         byte_count += total_in_buf2;
 318
 319         /* BB also add check that we are not beyond maximum buffer size */
 320
 321         pTargetSMB->smb_buf_length = byte_count;
 322
 323         if (remaining == total_in_buf2) {
 324                 cFYI(1, ("found the last secondary response"));
 325                 return 0; /* we are done */
 326         } else /* more responses to go */
 327                 return 1;
 328
 329 }
 330
 331 static int
 332 cifs_demultiplex_thread(struct TCP_Server_Info *server)
 333 {
 334         int length;
 335         unsigned int pdu_length, total_read;
 336         struct smb_hdr *smb_buffer = NULL;
 337         struct smb_hdr *bigbuf = NULL;
 338         struct smb_hdr *smallbuf = NULL;
 339         struct msghdr smb_msg;
 340         struct kvec iov;
 341         struct socket *csocket = server->ssocket;
 342         struct list_head *tmp;
 343         struct cifsSesInfo *ses;
 344         struct task_struct *task_to_wake = NULL;
 345         struct mid_q_entry *mid_entry;
 346         char temp;
 347         bool isLargeBuf = false;
 348         bool isMultiRsp;
 349         int reconnect;
 350
 351         current->flags |= PF_MEMALLOC;
 352         cFYI(1, ("Demultiplex PID: %d", task_pid_nr(current)));
 353         write_lock(&GlobalSMBSeslock);
 354         atomic_inc(&tcpSesAllocCount);
 355         length = tcpSesAllocCount.counter;
 356         write_unlock(&GlobalSMBSeslock);
 357         if (length  > 1)
 358                 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
 359                                 GFP_KERNEL);
 360
 361         set_freezable();
 362         while (!kthread_should_stop()) {
 363                 if (try_to_freeze())
 364                         continue;
 365                 if (bigbuf == NULL) {
 366                         bigbuf = cifs_buf_get();
 367                         if (!bigbuf) {
 368                                 cERROR(1, ("No memory for large SMB response"));
 369                                 msleep(3000);
 370                                 /* retry will check if exiting */
 371                                 continue;
 372                         }
 373                 } else if (isLargeBuf) {
 374                         /* we are reusing a dirty large buf, clear its start */
 375                         memset(bigbuf, 0, sizeof(struct smb_hdr));
 376                 }
 377
 378                 if (smallbuf == NULL) {
 379                         smallbuf = cifs_small_buf_get();
 380                         if (!smallbuf) {
 381                                 cERROR(1, ("No memory for SMB response"));
 382                                 msleep(1000);
 383                                 /* retry will check if exiting */
 384                                 continue;
 385                         }
 386                         /* beginning of smb buffer is cleared in our buf_get */
 387                 } else /* if existing small buf clear beginning */
 388                         memset(smallbuf, 0, sizeof(struct smb_hdr));
 389
 390                 isLargeBuf = false;
 391                 isMultiRsp = false;
 392                 smb_buffer = smallbuf;
 393                 iov.iov_base = smb_buffer;
 394                 iov.iov_len = 4;
 395                 smb_msg.msg_control = NULL;
 396                 smb_msg.msg_controllen = 0;
 397                 pdu_length = 4; /* enough to get RFC1001 header */
 398 incomplete_rcv:
 399                 length =
 400                     kernel_recvmsg(csocket, &smb_msg,
 401                                 &iov, 1, pdu_length, 0 /* BB other flags? */);
 402
 403                 if (kthread_should_stop()) {
 404                         break;
 405                 } else if (server->tcpStatus == CifsNeedReconnect) {
 406                         cFYI(1, ("Reconnect after server stopped responding"));
 407                         cifs_reconnect(server);
 408                         cFYI(1, ("call to reconnect done"));
 409                         csocket = server->ssocket;
 410                         continue;
 411                 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
 412                         msleep(1); /* minimum sleep to prevent looping
 413                                 allowing socket to clear and app threads to set
 414                                 tcpStatus CifsNeedReconnect if server hung */
 415                         if (pdu_length < 4)
 416                                 goto incomplete_rcv;
 417                         else
 418                                 continue;
 419                 } else if (length <= 0) {
 420                         if (server->tcpStatus == CifsNew) {
 421                                 cFYI(1, ("tcp session abend after SMBnegprot"));
 422                                 /* some servers kill the TCP session rather than
 423                                    returning an SMB negprot error, in which
 424                                    case reconnecting here is not going to help,
 425                                    and so simply return error to mount */
 426                                 break;
 427                         }
 428                         if (!try_to_freeze() && (length == -EINTR)) {
 429                                 cFYI(1, ("cifsd thread killed"));
 430                                 break;
 431                         }
 432                         cFYI(1, ("Reconnect after unexpected peek error %d",
 433                                 length));
 434                         cifs_reconnect(server);
 435                         csocket = server->ssocket;
 436                         wake_up(&server->response_q);
 437                         continue;
 438                 } else if (length < pdu_length) {
 439                         cFYI(1, ("requested %d bytes but only got %d bytes",
 440                                   pdu_length, length));
 441                         pdu_length -= length;
 442                         msleep(1);
 443                         goto incomplete_rcv;
 444                 }
 445
 446                 /* The right amount was read from socket - 4 bytes */
 447                 /* so we can now interpret the length field */
 448
 449                 /* the first byte big endian of the length field,
 450                 is actually not part of the length but the type
 451                 with the most common, zero, as regular data */
 452                 temp = *((char *) smb_buffer);
 453
 454                 /* Note that FC 1001 length is big endian on the wire,
 455                 but we convert it here so it is always manipulated
 456                 as host byte order */
 457                 pdu_length = ntohl(smb_buffer->smb_buf_length);
 458                 smb_buffer->smb_buf_length = pdu_length;
 459
 460                 cFYI(1, ("rfc1002 length 0x%x", pdu_length+4));
 461
 462                 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
 463                         continue;
 464                 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
 465                         cFYI(1, ("Good RFC 1002 session rsp"));
 466                         continue;
 467                 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
 468                         /* we get this from Windows 98 instead of
 469                            an error on SMB negprot response */
 470                         cFYI(1, ("Negative RFC1002 Session Response Error 0x%x)",
 471                                 pdu_length));
 472                         if (server->tcpStatus == CifsNew) {
 473                                 /* if nack on negprot (rather than
 474                                 ret of smb negprot error) reconnecting
 475                                 not going to help, ret error to mount */
 476                                 break;
 477                         } else {
 478                                 /* give server a second to
 479                                 clean up before reconnect attempt */
 480                                 msleep(1000);
 481                                 /* always try 445 first on reconnect
 482                                 since we get NACK on some if we ever
 483                                 connected to port 139 (the NACK is
 484                                 since we do not begin with RFC1001
 485                                 session initialize frame) */
 486                                 server->addr.sockAddr.sin_port =
 487                                         htons(CIFS_PORT);
 488                                 cifs_reconnect(server);
 489                                 csocket = server->ssocket;
 490                                 wake_up(&server->response_q);
 491                                 continue;
 492                         }
 493                 } else if (temp != (char) 0) {
 494                         cERROR(1, ("Unknown RFC 1002 frame"));
 495                         cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
 496                                       length);
 497                         cifs_reconnect(server);
 498                         csocket = server->ssocket;
 499                         continue;
 500                 }
 501
 502                 /* else we have an SMB response */
 503                 if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
 504                             (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) {
 505                         cERROR(1, ("Invalid size SMB length %d pdu_length %d",
 506                                         length, pdu_length+4));
 507                         cifs_reconnect(server);
 508                         csocket = server->ssocket;
 509                         wake_up(&server->response_q);
 510                         continue;
 511                 }
 512
 513                 /* else length ok */
 514                 reconnect = 0;
 515
 516                 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
 517                         isLargeBuf = true;
 518                         memcpy(bigbuf, smallbuf, 4);
 519                         smb_buffer = bigbuf;
 520                 }
 521                 length = 0;
 522                 iov.iov_base = 4 + (char *)smb_buffer;
 523                 iov.iov_len = pdu_length;
 524                 for (total_read = 0; total_read < pdu_length;
 525                      total_read += length) {
 526                         length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
 527                                                 pdu_length - total_read, 0);
 528                         if (kthread_should_stop() ||
 529                             (length == -EINTR)) {
 530                                 /* then will exit */
 531                                 reconnect = 2;
 532                                 break;
 533                         } else if (server->tcpStatus == CifsNeedReconnect) {
 534                                 cifs_reconnect(server);
 535                                 csocket = server->ssocket;
 536                                 /* Reconnect wakes up rspns q */
 537                                 /* Now we will reread sock */
 538                                 reconnect = 1;
 539                                 break;
 540                         } else if ((length == -ERESTARTSYS) ||
 541                                    (length == -EAGAIN)) {
 542                                 msleep(1); /* minimum sleep to prevent looping,
 543                                               allowing socket to clear and app
 544                                               threads to set tcpStatus
 545                                               CifsNeedReconnect if server hung*/
 546                                 length = 0;
 547                                 continue;
 548                         } else if (length <= 0) {
 549                                 cERROR(1, ("Received no data, expecting %d",
 550                                               pdu_length - total_read));
 551                                 cifs_reconnect(server);
 552                                 csocket = server->ssocket;
 553                                 reconnect = 1;
 554                                 break;
 555                         }
 556                 }
 557                 if (reconnect == 2)
 558                         break;
 559                 else if (reconnect == 1)
 560                         continue;
 561
 562                 length += 4; /* account for rfc1002 hdr */
 563
 564
 565                 dump_smb(smb_buffer, length);
 566                 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
 567                         cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
 568                         continue;
 569                 }
 570
 571
 572                 task_to_wake = NULL;
 573                 spin_lock(&GlobalMid_Lock);
 574                 list_for_each(tmp, &server->pending_mid_q) {
 575                         mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 576
 577                         if ((mid_entry->mid == smb_buffer->Mid) &&
 578                             (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
 579                             (mid_entry->command == smb_buffer->Command)) {
 580                                 if (check2ndT2(smb_buffer,server->maxBuf) > 0) {
 581                                         /* We have a multipart transact2 resp */
 582                                         isMultiRsp = true;
 583                                         if (mid_entry->resp_buf) {
 584                                                 /* merge response - fix up 1st*/
 585                                                 if (coalesce_t2(smb_buffer,
 586                                                         mid_entry->resp_buf)) {
 587                                                         mid_entry->multiRsp =
 588                                                                  true;
 589                                                         break;
 590                                                 } else {
 591                                                         /* all parts received */
 592                                                         mid_entry->multiEnd =
 593                                                                  true;
 594                                                         goto multi_t2_fnd;
 595                                                 }
 596                                         } else {
 597                                                 if (!isLargeBuf) {
 598                                                         cERROR(1,("1st trans2 resp needs bigbuf"));
 599                                         /* BB maybe we can fix this up,  switch
 600                                            to already allocated large buffer? */
 601                                                 } else {
 602                                                         /* Have first buffer */
 603                                                         mid_entry->resp_buf =
 604                                                                  smb_buffer;
 605                                                         mid_entry->largeBuf =
 606                                                                  true;
 607                                                         bigbuf = NULL;
 608                                                 }
 609                                         }
 610                                         break;
 611                                 }
 612                                 mid_entry->resp_buf = smb_buffer;
 613                                 mid_entry->largeBuf = isLargeBuf;
 614 multi_t2_fnd:
 615                                 task_to_wake = mid_entry->tsk;
 616                                 mid_entry->midState = MID_RESPONSE_RECEIVED;
 617 #ifdef CONFIG_CIFS_STATS2
 618                                 mid_entry->when_received = jiffies;
 619 #endif
 620                                 /* so we do not time out requests to  server
 621                                 which is still responding (since server could
 622                                 be busy but not dead) */
 623                                 server->lstrp = jiffies;
 624                                 break;
 625                         }
 626                 }
 627                 spin_unlock(&GlobalMid_Lock);
 628                 if (task_to_wake) {
 629                         /* Was previous buf put in mpx struct for multi-rsp? */
 630                         if (!isMultiRsp) {
 631                                 /* smb buffer will be freed by user thread */
 632                                 if (isLargeBuf)
 633                                         bigbuf = NULL;
 634                                 else
 635                                         smallbuf = NULL;
 636                         }
 637                         wake_up_process(task_to_wake);
 638                 } else if (!is_valid_oplock_break(smb_buffer, server) &&
 639                            !isMultiRsp) {
 640                         cERROR(1, ("No task to wake, unknown frame received! "
 641                                    "NumMids %d", midCount.counter));
 642                         cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
 643                                       sizeof(struct smb_hdr));
 644 #ifdef CONFIG_CIFS_DEBUG2
 645                         cifs_dump_detail(smb_buffer);
 646                         cifs_dump_mids(server);
 647 #endif /* CIFS_DEBUG2 */
 648
 649                 }
 650         } /* end while !EXITING */
 651
 652         spin_lock(&GlobalMid_Lock);
 653         server->tcpStatus = CifsExiting;
 654         spin_unlock(&GlobalMid_Lock);
 655
 656         /* don't exit until kthread_stop is called */
 657         set_current_state(TASK_UNINTERRUPTIBLE);
 658         while (!kthread_should_stop()) {
 659                 schedule();
 660                 set_current_state(TASK_UNINTERRUPTIBLE);
 661         }
 662         set_current_state(TASK_RUNNING);
 663
 664         /* check if we have blocked requests that need to free */
 665         /* Note that cifs_max_pending is normally 50, but
 666         can be set at module install time to as little as two */
 667         spin_lock(&GlobalMid_Lock);
 668         if (atomic_read(&server->inFlight) >= cifs_max_pending)
 669                 atomic_set(&server->inFlight, cifs_max_pending - 1);
 670         /* We do not want to set the max_pending too low or we
 671         could end up with the counter going negative */
 672         spin_unlock(&GlobalMid_Lock);
 673         /* Although there should not be any requests blocked on
 674         this queue it can not hurt to be paranoid and try to wake up requests
 675         that may haven been blocked when more than 50 at time were on the wire
 676         to the same server - they now will see the session is in exit state
 677         and get out of SendReceive.  */
 678         wake_up_all(&server->request_q);
 679         /* give those requests time to exit */
 680         msleep(125);
 681
 682         if (server->ssocket) {
 683                 sock_release(csocket);
 684                 server->ssocket = NULL;
 685         }
 686         /* buffer usuallly freed in free_mid - need to free it here on exit */
 687         cifs_buf_release(bigbuf);
 688         if (smallbuf) /* no sense logging a debug message if NULL */
 689                 cifs_small_buf_release(smallbuf);
 690
 691         read_lock(&GlobalSMBSeslock);
 692         if (list_empty(&server->pending_mid_q)) {
 693                 /* loop through server session structures attached to this and
 694                     mark them dead */
 695                 list_for_each(tmp, &GlobalSMBSessionList) {
 696                         ses =
 697                             list_entry(tmp, struct cifsSesInfo,
 698                                        cifsSessionList);
 699                         if (ses->server == server) {
 700                                 ses->status = CifsExiting;
 701                                 ses->server = NULL;
 702                         }
 703                 }
 704                 read_unlock(&GlobalSMBSeslock);
 705         } else {
 706                 /* although we can not zero the server struct pointer yet,
 707                 since there are active requests which may depnd on them,
 708                 mark the corresponding SMB sessions as exiting too */
 709                 list_for_each(tmp, &GlobalSMBSessionList) {
 710                         ses = list_entry(tmp, struct cifsSesInfo,
 711                                          cifsSessionList);
 712                         if (ses->server == server)
 713                                 ses->status = CifsExiting;
 714                 }
 715
 716                 spin_lock(&GlobalMid_Lock);
 717                 list_for_each(tmp, &server->pending_mid_q) {
 718                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 719                         if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
 720                                 cFYI(1, ("Clearing Mid 0x%x - waking up ",
 721                                          mid_entry->mid));
 722                                 task_to_wake = mid_entry->tsk;
 723                                 if (task_to_wake)
 724                                         wake_up_process(task_to_wake);
 725                         }
 726                 }
 727                 spin_unlock(&GlobalMid_Lock);
 728                 read_unlock(&GlobalSMBSeslock);
 729                 /* 1/8th of sec is more than enough time for them to exit */
 730                 msleep(125);
 731         }
 732
 733         if (!list_empty(&server->pending_mid_q)) {
 734                 /* mpx threads have not exited yet give them
 735                 at least the smb send timeout time for long ops */
 736                 /* due to delays on oplock break requests, we need
 737                 to wait at least 45 seconds before giving up
 738                 on a request getting a response and going ahead
 739                 and killing cifsd */
 740                 cFYI(1, ("Wait for exit from demultiplex thread"));
 741                 msleep(46000);
 742                 /* if threads still have not exited they are probably never
 743                 coming home not much else we can do but free the memory */
 744         }
 745
 746         write_lock(&GlobalSMBSeslock);
 747         atomic_dec(&tcpSesAllocCount);
 748         length = tcpSesAllocCount.counter;
 749
 750         /* last chance to mark ses pointers invalid
 751         if there are any pointing to this (e.g
 752         if a crazy root user tried to kill cifsd
 753         kernel thread explicitly this might happen) */
 754         list_for_each(tmp, &GlobalSMBSessionList) {
 755                 ses = list_entry(tmp, struct cifsSesInfo,
 756                                 cifsSessionList);
 757                 if (ses->server == server)
 758                         ses->server = NULL;
 759         }
 760         write_unlock(&GlobalSMBSeslock);
 761
 762         kfree(server->hostname);
 763         kfree(server);
 764         if (length  > 0)
 765                 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
 766                                 GFP_KERNEL);
 767
 768         return 0;
 769 }
 770
 771 /* extract the host portion of the UNC string */
 772 static char *
 773 extract_hostname(const char *unc)
 774 {
 775         const char *src;
 776         char *dst, *delim;
 777         unsigned int len;
 778
 779         /* skip double chars at beginning of string */
 780         /* BB: check validity of these bytes? */
 781         src = unc + 2;
 782
 783         /* delimiter between hostname and sharename is always '\\' now */
 784         delim = strchr(src, '\\');
 785         if (!delim)
 786                 return ERR_PTR(-EINVAL);
 787
 788         len = delim - src;
 789         dst = kmalloc((len + 1), GFP_KERNEL);
 790         if (dst == NULL)
 791                 return ERR_PTR(-ENOMEM);
 792
 793         memcpy(dst, src, len);
 794         dst[len] = '\0';
 795
 796         return dst;
 797 }
 798
 799 static int
 800 cifs_parse_mount_options(char *options, const char *devname,
 801                          struct smb_vol *vol)
 802 {
 803         char *value;
 804         char *data;
 805         unsigned int  temp_len, i, j;
 806         char separator[2];
 807
 808         separator[0] = ',';
 809         separator[1] = 0;
 810
 811         if (Local_System_Name[0] != 0)
 812                 memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
 813         else {
 814                 char *nodename = utsname()->nodename;
 815                 int n = strnlen(nodename, 15);
 816                 memset(vol->source_rfc1001_name, 0x20, 15);
 817                 for (i = 0; i < n; i++) {
 818                         /* does not have to be perfect mapping since field is
 819                         informational, only used for servers that do not support
 820                         port 445 and it can be overridden at mount time */
 821                         vol->source_rfc1001_name[i] = toupper(nodename[i]);
 822                 }
 823         }
 824         vol->source_rfc1001_name[15] = 0;
 825         /* null target name indicates to use *SMBSERVR default called name
 826            if we end up sending RFC1001 session initialize */
 827         vol->target_rfc1001_name[0] = 0;
 828         vol->linux_uid = current->uid;  /* current->euid instead? */
 829         vol->linux_gid = current->gid;
 830         vol->dir_mode = S_IRWXUGO;
 831         /* 2767 perms indicate mandatory locking support */
 832         vol->file_mode = (S_IRWXUGO | S_ISGID) & (~S_IXGRP);
 833
 834         /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
 835         vol->rw = true;
 836         /* default is always to request posix paths. */
 837         vol->posix_paths = 1;
 838
 839         if (!options)
 840                 return 1;
 841
 842         if (strncmp(options, "sep=", 4) == 0) {
 843                 if (options[4] != 0) {
 844                         separator[0] = options[4];
 845                         options += 5;
 846                 } else {
 847                         cFYI(1, ("Null separator not allowed"));
 848                 }
 849         }
 850
 851         while ((data = strsep(&options, separator)) != NULL) {
 852                 if (!*data)
 853                         continue;
 854                 if ((value = strchr(data, '=')) != NULL)
 855                         *value++ = '\0';
 856
 857                 /* Have to parse this before we parse for "user" */
 858                 if (strnicmp(data, "user_xattr", 10) == 0) {
 859                         vol->no_xattr = 0;
 860                 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
 861                         vol->no_xattr = 1;
 862                 } else if (strnicmp(data, "user", 4) == 0) {
 863                         if (!value) {
 864                                 printk(KERN_WARNING
 865                                        "CIFS: invalid or missing username\n");
 866                                 return 1;       /* needs_arg; */
 867                         } else if (!*value) {
 868                                 /* null user, ie anonymous, authentication */
 869                                 vol->nullauth = 1;
 870                         }
 871                         if (strnlen(value, 200) < 200) {
 872                                 vol->username = value;
 873                         } else {
 874                                 printk(KERN_WARNING "CIFS: username too long\n");
 875                                 return 1;
 876                         }
 877                 } else if (strnicmp(data, "pass", 4) == 0) {
 878                         if (!value) {
 879                                 vol->password = NULL;
 880                                 continue;
 881                         } else if (value[0] == 0) {
 882                                 /* check if string begins with double comma
 883                                    since that would mean the password really
 884                                    does start with a comma, and would not
 885                                    indicate an empty string */
 886                                 if (value[1] != separator[0]) {
 887                                         vol->password = NULL;
 888                                         continue;
 889                                 }
 890                         }
 891                         temp_len = strlen(value);
 892                         /* removed password length check, NTLM passwords
 893                                 can be arbitrarily long */
 894
 895                         /* if comma in password, the string will be
 896                         prematurely null terminated.  Commas in password are
 897                         specified across the cifs mount interface by a double
 898                         comma ie ,, and a comma used as in other cases ie ','
 899                         as a parameter delimiter/separator is single and due
 900                         to the strsep above is temporarily zeroed. */
 901
 902                         /* NB: password legally can have multiple commas and
 903                         the only illegal character in a password is null */
 904
 905                         if ((value[temp_len] == 0) &&
 906                             (value[temp_len+1] == separator[0])) {
 907                                 /* reinsert comma */
 908                                 value[temp_len] = separator[0];
 909                                 temp_len += 2;  /* move after second comma */
 910                                 while (value[temp_len] != 0)  {
 911                                         if (value[temp_len] == separator[0]) {
 912                                                 if (value[temp_len+1] ==
 913                                                      separator[0]) {
 914                                                 /* skip second comma */
 915                                                         temp_len++;
 916                                                 } else {
 917                                                 /* single comma indicating start
 918                                                          of next parm */
 919                                                         break;
 920                                                 }
 921                                         }
 922                                         temp_len++;
 923                                 }
 924                                 if (value[temp_len] == 0) {
 925                                         options = NULL;
 926                                 } else {
 927                                         value[temp_len] = 0;
 928                                         /* point option to start of next parm */
 929                                         options = value + temp_len + 1;
 930                                 }
 931                                 /* go from value to value + temp_len condensing
 932                                 double commas to singles. Note that this ends up
 933                                 allocating a few bytes too many, which is ok */
 934                                 vol->password = kzalloc(temp_len, GFP_KERNEL);
 935                                 if (vol->password == NULL) {
 936                                         printk(KERN_WARNING "CIFS: no memory "
 937                                                             "for password\n");
 938                                         return 1;
 939                                 }
 940                                 for (i = 0, j = 0; i < temp_len; i++, j++) {
 941                                         vol->password[j] = value[i];
 942                                         if (value[i] == separator[0]
 943                                                 && value[i+1] == separator[0]) {
 944                                                 /* skip second comma */
 945                                                 i++;
 946                                         }
 947                                 }
 948                                 vol->password[j] = 0;
 949                         } else {
 950                                 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
 951                                 if (vol->password == NULL) {
 952                                         printk(KERN_WARNING "CIFS: no memory "
 953                                                             "for password\n");
 954                                         return 1;
 955                                 }
 956                                 strcpy(vol->password, value);
 957                         }
 958                 } else if (strnicmp(data, "ip", 2) == 0) {
 959                         if (!value || !*value) {
 960                                 vol->UNCip = NULL;
 961                         } else if (strnlen(value, 35) < 35) {
 962                                 vol->UNCip = value;
 963                         } else {
 964                                 printk(KERN_WARNING "CIFS: ip address "
 965                                                     "too long\n");
 966                                 return 1;
 967                         }
 968                 } else if (strnicmp(data, "sec", 3) == 0) {
 969                         if (!value || !*value) {
 970                                 cERROR(1, ("no security value specified"));
 971                                 continue;
 972                         } else if (strnicmp(value, "krb5i", 5) == 0) {
 973                                 vol->secFlg |= CIFSSEC_MAY_KRB5 |
 974                                         CIFSSEC_MUST_SIGN;
 975                         } else if (strnicmp(value, "krb5p", 5) == 0) {
 976                                 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
 977                                         CIFSSEC_MAY_KRB5; */
 978                                 cERROR(1, ("Krb5 cifs privacy not supported"));
 979                                 return 1;
 980                         } else if (strnicmp(value, "krb5", 4) == 0) {
 981                                 vol->secFlg |= CIFSSEC_MAY_KRB5;
 982                         } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
 983                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
 984                                         CIFSSEC_MUST_SIGN;
 985                         } else if (strnicmp(value, "ntlmv2", 6) == 0) {
 986                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
 987                         } else if (strnicmp(value, "ntlmi", 5) == 0) {
 988                                 vol->secFlg |= CIFSSEC_MAY_NTLM |
 989                                         CIFSSEC_MUST_SIGN;
 990                         } else if (strnicmp(value, "ntlm", 4) == 0) {
 991                                 /* ntlm is default so can be turned off too */
 992                                 vol->secFlg |= CIFSSEC_MAY_NTLM;
 993                         } else if (strnicmp(value, "nontlm", 6) == 0) {
 994                                 /* BB is there a better way to do this? */
 995                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
 996 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 997                         } else if (strnicmp(value, "lanman", 6) == 0) {
 998                                 vol->secFlg |= CIFSSEC_MAY_LANMAN;
 999 #endif
1000                         } else if (strnicmp(value, "none", 4) == 0) {
1001                                 vol->nullauth = 1;
1002                         } else {
1003                                 cERROR(1, ("bad security option: %s", value));
1004                                 return 1;
1005                         }
1006                 } else if ((strnicmp(data, "unc", 3) == 0)
1007                            || (strnicmp(data, "target", 6) == 0)
1008                            || (strnicmp(data, "path", 4) == 0)) {
1009                         if (!value || !*value) {
1010                                 printk(KERN_WARNING "CIFS: invalid path to "
1011                                                     "network resource\n");
1012                                 return 1;       /* needs_arg; */
1013                         }
1014                         if ((temp_len = strnlen(value, 300)) < 300) {
1015                                 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1016                                 if (vol->UNC == NULL)
1017                                         return 1;
1018                                 strcpy(vol->UNC, value);
1019                                 if (strncmp(vol->UNC, "//", 2) == 0) {
1020                                         vol->UNC[0] = '\\';
1021                                         vol->UNC[1] = '\\';
1022                                 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1023                                         printk(KERN_WARNING
1024                                                "CIFS: UNC Path does not begin "
1025                                                "with // or \\\\ \n");
1026                                         return 1;
1027                                 }
1028                         } else {
1029                                 printk(KERN_WARNING "CIFS: UNC name too long\n");
1030                                 return 1;
1031                         }
1032                 } else if ((strnicmp(data, "domain", 3) == 0)
1033                            || (strnicmp(data, "workgroup", 5) == 0)) {
1034                         if (!value || !*value) {
1035                                 printk(KERN_WARNING "CIFS: invalid domain name\n");
1036                                 return 1;       /* needs_arg; */
1037                         }
1038                         /* BB are there cases in which a comma can be valid in
1039                         a domain name and need special handling? */
1040                         if (strnlen(value, 256) < 256) {
1041                                 vol->domainname = value;
1042                                 cFYI(1, ("Domain name set"));
1043                         } else {
1044                                 printk(KERN_WARNING "CIFS: domain name too "
1045                                                     "long\n");
1046                                 return 1;
1047                         }
1048                 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1049                         if (!value || !*value) {
1050                                 printk(KERN_WARNING
1051                                         "CIFS: invalid path prefix\n");
1052                                 return 1;       /* needs_argument */
1053                         }
1054                         if ((temp_len = strnlen(value, 1024)) < 1024) {
1055                                 if (value[0] != '/')
1056                                         temp_len++;  /* missing leading slash */
1057                                 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1058                                 if (vol->prepath == NULL)
1059                                         return 1;
1060                                 if (value[0] != '/') {
1061                                         vol->prepath[0] = '/';
1062                                         strcpy(vol->prepath+1, value);
1063                                 } else
1064                                         strcpy(vol->prepath, value);
1065                                 cFYI(1, ("prefix path %s", vol->prepath));
1066                         } else {
1067                                 printk(KERN_WARNING "CIFS: prefix too long\n");
1068                                 return 1;
1069                         }
1070                 } else if (strnicmp(data, "iocharset", 9) == 0) {
1071                         if (!value || !*value) {
1072                                 printk(KERN_WARNING "CIFS: invalid iocharset "
1073                                                     "specified\n");
1074                                 return 1;       /* needs_arg; */
1075                         }
1076                         if (strnlen(value, 65) < 65) {
1077                                 if (strnicmp(value, "default", 7))
1078                                         vol->iocharset = value;
1079                                 /* if iocharset not set then load_nls_default
1080                                    is used by caller */
1081                                 cFYI(1, ("iocharset set to %s", value));
1082                         } else {
1083                                 printk(KERN_WARNING "CIFS: iocharset name "
1084                                                     "too long.\n");
1085                                 return 1;
1086                         }
1087                 } else if (strnicmp(data, "uid", 3) == 0) {
1088                         if (value && *value) {
1089                                 vol->linux_uid =
1090                                         simple_strtoul(value, &value, 0);
1091                                 vol->override_uid = 1;
1092                         }
1093                 } else if (strnicmp(data, "gid", 3) == 0) {
1094                         if (value && *value) {
1095                                 vol->linux_gid =
1096                                         simple_strtoul(value, &value, 0);
1097                                 vol->override_gid = 1;
1098                         }
1099                 } else if (strnicmp(data, "file_mode", 4) == 0) {
1100                         if (value && *value) {
1101                                 vol->file_mode =
1102                                         simple_strtoul(value, &value, 0);
1103                         }
1104                 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1105                         if (value && *value) {
1106                                 vol->dir_mode =
1107                                         simple_strtoul(value, &value, 0);
1108                         }
1109                 } else if (strnicmp(data, "dirmode", 4) == 0) {
1110                         if (value && *value) {
1111                                 vol->dir_mode =
1112                                         simple_strtoul(value, &value, 0);
1113                         }
1114                 } else if (strnicmp(data, "port", 4) == 0) {
1115                         if (value && *value) {
1116                                 vol->port =
1117                                         simple_strtoul(value, &value, 0);
1118                         }
1119                 } else if (strnicmp(data, "rsize", 5) == 0) {
1120                         if (value && *value) {
1121                                 vol->rsize =
1122                                         simple_strtoul(value, &value, 0);
1123                         }
1124                 } else if (strnicmp(data, "wsize", 5) == 0) {
1125                         if (value && *value) {
1126                                 vol->wsize =
1127                                         simple_strtoul(value, &value, 0);
1128                         }
1129                 } else if (strnicmp(data, "sockopt", 5) == 0) {
1130                         if (value && *value) {
1131                                 vol->sockopt =
1132                                         simple_strtoul(value, &value, 0);
1133                         }
1134                 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1135                         if (!value || !*value || (*value == ' ')) {
1136                                 cFYI(1, ("invalid (empty) netbiosname"));
1137                         } else {
1138                                 memset(vol->source_rfc1001_name, 0x20, 15);
1139                                 for (i = 0; i < 15; i++) {
1140                                 /* BB are there cases in which a comma can be
1141                                 valid in this workstation netbios name (and need
1142                                 special handling)? */
1143
1144                                 /* We do not uppercase netbiosname for user */
1145                                         if (value[i] == 0)
1146                                                 break;
1147                                         else
1148                                                 vol->source_rfc1001_name[i] =
1149                                                                 value[i];
1150                                 }
1151                                 /* The string has 16th byte zero still from
1152                                 set at top of the function  */
1153                                 if ((i == 15) && (value[i] != 0))
1154                                         printk(KERN_WARNING "CIFS: netbiosname"
1155                                                 " longer than 15 truncated.\n");
1156                         }
1157                 } else if (strnicmp(data, "servern", 7) == 0) {
1158                         /* servernetbiosname specified override *SMBSERVER */
1159                         if (!value || !*value || (*value == ' ')) {
1160                                 cFYI(1, ("empty server netbiosname specified"));
1161                         } else {
1162                                 /* last byte, type, is 0x20 for servr type */
1163                                 memset(vol->target_rfc1001_name, 0x20, 16);
1164
1165                                 for (i = 0; i < 15; i++) {
1166                                 /* BB are there cases in which a comma can be
1167                                    valid in this workstation netbios name
1168                                    (and need special handling)? */
1169
1170                                 /* user or mount helper must uppercase
1171                                    the netbiosname */
1172                                         if (value[i] == 0)
1173                                                 break;
1174                                         else
1175                                                 vol->target_rfc1001_name[i] =
1176                                                                 value[i];
1177                                 }
1178                                 /* The string has 16th byte zero still from
1179                                    set at top of the function  */
1180                                 if ((i == 15) && (value[i] != 0))
1181                                         printk(KERN_WARNING "CIFS: server net"
1182                                         "biosname longer than 15 truncated.\n");
1183                         }
1184                 } else if (strnicmp(data, "credentials", 4) == 0) {
1185                         /* ignore */
1186                 } else if (strnicmp(data, "version", 3) == 0) {
1187                         /* ignore */
1188                 } else if (strnicmp(data, "guest", 5) == 0) {
1189                         /* ignore */
1190                 } else if (strnicmp(data, "rw", 2) == 0) {
1191                         vol->rw = true;
1192                 } else if ((strnicmp(data, "suid", 4) == 0) ||
1193                                    (strnicmp(data, "nosuid", 6) == 0) ||
1194                                    (strnicmp(data, "exec", 4) == 0) ||
1195                                    (strnicmp(data, "noexec", 6) == 0) ||
1196                                    (strnicmp(data, "nodev", 5) == 0) ||
1197                                    (strnicmp(data, "noauto", 6) == 0) ||
1198                                    (strnicmp(data, "dev", 3) == 0)) {
1199                         /*  The mount tool or mount.cifs helper (if present)
1200                             uses these opts to set flags, and the flags are read
1201                             by the kernel vfs layer before we get here (ie
1202                             before read super) so there is no point trying to
1203                             parse these options again and set anything and it
1204                             is ok to just ignore them */
1205                         continue;
1206                 } else if (strnicmp(data, "ro", 2) == 0) {
1207                         vol->rw = false;
1208                 } else if (strnicmp(data, "hard", 4) == 0) {
1209                         vol->retry = 1;
1210                 } else if (strnicmp(data, "soft", 4) == 0) {
1211                         vol->retry = 0;
1212                 } else if (strnicmp(data, "perm", 4) == 0) {
1213                         vol->noperm = 0;
1214                 } else if (strnicmp(data, "noperm", 6) == 0) {
1215                         vol->noperm = 1;
1216                 } else if (strnicmp(data, "mapchars", 8) == 0) {
1217                         vol->remap = 1;
1218                 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1219                         vol->remap = 0;
1220                 } else if (strnicmp(data, "sfu", 3) == 0) {
1221                         vol->sfu_emul = 1;
1222                 } else if (strnicmp(data, "nosfu", 5) == 0) {
1223                         vol->sfu_emul = 0;
1224                 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1225                         vol->posix_paths = 1;
1226                 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1227                         vol->posix_paths = 0;
1228                 } else if (strnicmp(data, "nounix", 6) == 0) {
1229                         vol->no_linux_ext = 1;
1230                 } else if (strnicmp(data, "nolinux", 7) == 0) {
1231                         vol->no_linux_ext = 1;
1232                 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1233                            (strnicmp(data, "ignorecase", 10)  == 0)) {
1234                         vol->nocase = 1;
1235                 } else if (strnicmp(data, "brl", 3) == 0) {
1236                         vol->nobrl =  0;
1237                 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1238                            (strnicmp(data, "nolock", 6) == 0)) {
1239                         vol->nobrl =  1;
1240                         /* turn off mandatory locking in mode
1241                         if remote locking is turned off since the
1242                         local vfs will do advisory */
1243                         if (vol->file_mode ==
1244                                 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1245                                 vol->file_mode = S_IALLUGO;
1246                 } else if (strnicmp(data, "setuids", 7) == 0) {
1247                         vol->setuids = 1;
1248                 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1249                         vol->setuids = 0;
1250                 } else if (strnicmp(data, "dynperm", 7) == 0) {
1251                         vol->dynperm = true;
1252                 } else if (strnicmp(data, "nodynperm", 9) == 0) {
1253                         vol->dynperm = false;
1254                 } else if (strnicmp(data, "nohard", 6) == 0) {
1255                         vol->retry = 0;
1256                 } else if (strnicmp(data, "nosoft", 6) == 0) {
1257                         vol->retry = 1;
1258                 } else if (strnicmp(data, "nointr", 6) == 0) {
1259                         vol->intr = 0;
1260                 } else if (strnicmp(data, "intr", 4) == 0) {
1261                         vol->intr = 1;
1262                 } else if (strnicmp(data, "serverino", 7) == 0) {
1263                         vol->server_ino = 1;
1264                 } else if (strnicmp(data, "noserverino", 9) == 0) {
1265                         vol->server_ino = 0;
1266                 } else if (strnicmp(data, "cifsacl", 7) == 0) {
1267                         vol->cifs_acl = 1;
1268                 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1269                         vol->cifs_acl = 0;
1270                 } else if (strnicmp(data, "acl", 3) == 0) {
1271                         vol->no_psx_acl = 0;
1272                 } else if (strnicmp(data, "noacl", 5) == 0) {
1273                         vol->no_psx_acl = 1;
1274                 } else if (strnicmp(data, "sign", 4) == 0) {
1275                         vol->secFlg |= CIFSSEC_MUST_SIGN;
1276 /*              } else if (strnicmp(data, "seal",4) == 0) {
1277                         vol->secFlg |= CIFSSEC_MUST_SEAL; */
1278                 } else if (strnicmp(data, "direct", 6) == 0) {
1279                         vol->direct_io = 1;
1280                 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
1281                         vol->direct_io = 1;
1282                 } else if (strnicmp(data, "in6_addr", 8) == 0) {
1283                         if (!value || !*value) {
1284                                 vol->in6_addr = NULL;
1285                         } else if (strnlen(value, 49) == 48) {
1286                                 vol->in6_addr = value;
1287                         } else {
1288                                 printk(KERN_WARNING "CIFS: ip v6 address not "
1289                                                     "48 characters long\n");
1290                                 return 1;
1291                         }
1292                 } else if (strnicmp(data, "noac", 4) == 0) {
1293                         printk(KERN_WARNING "CIFS: Mount option noac not "
1294                                 "supported. Instead set "
1295                                 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1296                 } else
1297                         printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1298                                                 data);
1299         }
1300         if (vol->UNC == NULL) {
1301                 if (devname == NULL) {
1302                         printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1303                                                 "target\n");
1304                         return 1;
1305                 }
1306                 if ((temp_len = strnlen(devname, 300)) < 300) {
1307                         vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1308                         if (vol->UNC == NULL)
1309                                 return 1;
1310                         strcpy(vol->UNC, devname);
1311                         if (strncmp(vol->UNC, "//", 2) == 0) {
1312                                 vol->UNC[0] = '\\';
1313                                 vol->UNC[1] = '\\';
1314                         } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1315                                 printk(KERN_WARNING "CIFS: UNC Path does not "
1316                                                     "begin with // or \\\\ \n");
1317                                 return 1;
1318                         }
1319                         value = strpbrk(vol->UNC+2, "/\\");
1320                         if (value)
1321                                 *value = '\\';
1322                 } else {
1323                         printk(KERN_WARNING "CIFS: UNC name too long\n");
1324                         return 1;
1325                 }
1326         }
1327         if (vol->UNCip == NULL)
1328                 vol->UNCip = &vol->UNC[2];
1329
1330         return 0;
1331 }
1332
1333 static struct cifsSesInfo *
1334 cifs_find_tcp_session(struct in_addr *target_ip_addr,
1335                       struct in6_addr *target_ip6_addr,
1336                       char *userName, struct TCP_Server_Info **psrvTcp)
1337 {
1338         struct list_head *tmp;
1339         struct cifsSesInfo *ses;
1340
1341         *psrvTcp = NULL;
1342
1343         read_lock(&GlobalSMBSeslock);
1344         list_for_each(tmp, &GlobalSMBSessionList) {
1345                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
1346                 if (!ses->server)
1347                         continue;
1348
1349                 if (target_ip_addr &&
1350                     ses->server->addr.sockAddr.sin_addr.s_addr != target_ip_addr->s_addr)
1351                                 continue;
1352                 else if (target_ip6_addr &&
1353                          memcmp(&ses->server->addr.sockAddr6.sin6_addr,
1354                                 target_ip6_addr, sizeof(*target_ip6_addr)))
1355                                 continue;
1356                 /* BB lock server and tcp session; increment use count here?? */
1357
1358                 /* found a match on the TCP session */
1359                 *psrvTcp = ses->server;
1360
1361                 /* BB check if reconnection needed */
1362                 if (strncmp(ses->userName, userName, MAX_USERNAME_SIZE) == 0) {
1363                         read_unlock(&GlobalSMBSeslock);
1364                         /* Found exact match on both TCP and
1365                            SMB sessions */
1366                         return ses;
1367                 }
1368                 /* else tcp and smb sessions need reconnection */
1369         }
1370         read_unlock(&GlobalSMBSeslock);
1371
1372         return NULL;
1373 }
1374
1375 static struct cifsTconInfo *
1376 find_unc(__be32 new_target_ip_addr, char *uncName, char *userName)
1377 {
1378         struct list_head *tmp;
1379         struct cifsTconInfo *tcon;
1380         __be32 old_ip;
1381
1382         read_lock(&GlobalSMBSeslock);
1383
1384         list_for_each(tmp, &GlobalTreeConnectionList) {
1385                 cFYI(1, ("Next tcon"));
1386                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
1387                 if (!tcon->ses || !tcon->ses->server)
1388                         continue;
1389
1390                 old_ip = tcon->ses->server->addr.sockAddr.sin_addr.s_addr;
1391                 cFYI(1, ("old ip addr: %x == new ip %x ?",
1392                         old_ip, new_target_ip_addr));
1393
1394                 if (old_ip != new_target_ip_addr)
1395                         continue;
1396
1397                 /* BB lock tcon, server, tcp session and increment use count? */
1398                 /* found a match on the TCP session */
1399                 /* BB check if reconnection needed */
1400                 cFYI(1, ("IP match, old UNC: %s new: %s",
1401                         tcon->treeName, uncName));
1402
1403                 if (strncmp(tcon->treeName, uncName, MAX_TREE_SIZE))
1404                         continue;
1405
1406                 cFYI(1, ("and old usr: %s new: %s",
1407                         tcon->treeName, uncName));
1408
1409                 if (strncmp(tcon->ses->userName, userName, MAX_USERNAME_SIZE))
1410                         continue;
1411
1412                 /* matched smb session (user name) */
1413                 read_unlock(&GlobalSMBSeslock);
1414                 return tcon;
1415         }
1416
1417         read_unlock(&GlobalSMBSeslock);
1418         return NULL;
1419 }
1420
1421 int
1422 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
1423              const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
1424              struct dfs_info3_param **preferrals, int remap)
1425 {
1426         char *temp_unc;
1427         int rc = 0;
1428
1429         *pnum_referrals = 0;
1430         *preferrals = NULL;
1431
1432         if (pSesInfo->ipc_tid == 0) {
1433                 temp_unc = kmalloc(2 /* for slashes */ +
1434                         strnlen(pSesInfo->serverName,
1435                                 SERVER_NAME_LEN_WITH_NULL * 2)
1436                                  + 1 + 4 /* slash IPC$ */  + 2,
1437                                 GFP_KERNEL);
1438                 if (temp_unc == NULL)
1439                         return -ENOMEM;
1440                 temp_unc[0] = '\\';
1441                 temp_unc[1] = '\\';
1442                 strcpy(temp_unc + 2, pSesInfo->serverName);
1443                 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1444                 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1445                 cFYI(1,
1446                      ("CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid));
1447                 kfree(temp_unc);
1448         }
1449         if (rc == 0)
1450                 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1451                                      pnum_referrals, nls_codepage, remap);
1452         /* BB map targetUNCs to dfs_info3 structures, here or
1453                 in CIFSGetDFSRefer BB */
1454
1455         return rc;
1456 }
1457
1458 /* See RFC1001 section 14 on representation of Netbios names */
1459 static void rfc1002mangle(char *target, char *source, unsigned int length)
1460 {
1461         unsigned int i, j;
1462
1463         for (i = 0, j = 0; i < (length); i++) {
1464                 /* mask a nibble at a time and encode */
1465                 target[j] = 'A' + (0x0F & (source[i] >> 4));
1466                 target[j+1] = 'A' + (0x0F & source[i]);
1467                 j += 2;
1468         }
1469
1470 }
1471
1472
1473 static int
1474 ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
1475              char *netbios_name, char *target_name)
1476 {
1477         int rc = 0;
1478         int connected = 0;
1479         __be16 orig_port = 0;
1480
1481         if (*csocket == NULL) {
1482                 rc = sock_create_kern(PF_INET, SOCK_STREAM,
1483                                       IPPROTO_TCP, csocket);
1484                 if (rc < 0) {
1485                         cERROR(1, ("Error %d creating socket", rc));
1486                         *csocket = NULL;
1487                         return rc;
1488                 } else {
1489                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1490                         cFYI(1, ("Socket created"));
1491                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1492                 }
1493         }
1494
1495         psin_server->sin_family = AF_INET;
1496         if (psin_server->sin_port) { /* user overrode default port */
1497                 rc = (*csocket)->ops->connect(*csocket,
1498                                 (struct sockaddr *) psin_server,
1499                                 sizeof(struct sockaddr_in), 0);
1500                 if (rc >= 0)
1501                         connected = 1;
1502         }
1503
1504         if (!connected) {
1505                 /* save original port so we can retry user specified port
1506                         later if fall back ports fail this time  */
1507                 orig_port = psin_server->sin_port;
1508
1509                 /* do not retry on the same port we just failed on */
1510                 if (psin_server->sin_port != htons(CIFS_PORT)) {
1511                         psin_server->sin_port = htons(CIFS_PORT);
1512
1513                         rc = (*csocket)->ops->connect(*csocket,
1514                                         (struct sockaddr *) psin_server,
1515                                         sizeof(struct sockaddr_in), 0);
1516                         if (rc >= 0)
1517                                 connected = 1;
1518                 }
1519         }
1520         if (!connected) {
1521                 psin_server->sin_port = htons(RFC1001_PORT);
1522                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1523                                               psin_server,
1524                                               sizeof(struct sockaddr_in), 0);
1525                 if (rc >= 0)
1526                         connected = 1;
1527         }
1528
1529         /* give up here - unless we want to retry on different
1530                 protocol families some day */
1531         if (!connected) {
1532                 if (orig_port)
1533                         psin_server->sin_port = orig_port;
1534                 cFYI(1, ("Error %d connecting to server via ipv4", rc));
1535                 sock_release(*csocket);
1536                 *csocket = NULL;
1537                 return rc;
1538         }
1539         /* Eventually check for other socket options to change from
1540                 the default. sock_setsockopt not used because it expects
1541                 user space buffer */
1542          cFYI(1, ("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
1543                  (*csocket)->sk->sk_sndbuf,
1544                  (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
1545         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1546         /* make the bufsizes depend on wsize/rsize and max requests */
1547         if ((*csocket)->sk->sk_sndbuf < (200 * 1024))
1548                 (*csocket)->sk->sk_sndbuf = 200 * 1024;
1549         if ((*csocket)->sk->sk_rcvbuf < (140 * 1024))
1550                 (*csocket)->sk->sk_rcvbuf = 140 * 1024;
1551
1552         /* send RFC1001 sessinit */
1553         if (psin_server->sin_port == htons(RFC1001_PORT)) {
1554                 /* some servers require RFC1001 sessinit before sending
1555                 negprot - BB check reconnection in case where second
1556                 sessinit is sent but no second negprot */
1557                 struct rfc1002_session_packet *ses_init_buf;
1558                 struct smb_hdr *smb_buf;
1559                 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
1560                                        GFP_KERNEL);
1561                 if (ses_init_buf) {
1562                         ses_init_buf->trailer.session_req.called_len = 32;
1563                         if (target_name && (target_name[0] != 0)) {
1564                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1565                                         target_name, 16);
1566                         } else {
1567                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1568                                         DEFAULT_CIFS_CALLED_NAME, 16);
1569                         }
1570
1571                         ses_init_buf->trailer.session_req.calling_len = 32;
1572                         /* calling name ends in null (byte 16) from old smb
1573                         convention. */
1574                         if (netbios_name && (netbios_name[0] != 0)) {
1575                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1576                                         netbios_name, 16);
1577                         } else {
1578                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1579                                         "LINUX_CIFS_CLNT", 16);
1580                         }
1581                         ses_init_buf->trailer.session_req.scope1 = 0;
1582                         ses_init_buf->trailer.session_req.scope2 = 0;
1583                         smb_buf = (struct smb_hdr *)ses_init_buf;
1584                         /* sizeof RFC1002_SESSION_REQUEST with no scope */
1585                         smb_buf->smb_buf_length = 0x81000044;
1586                         rc = smb_send(*csocket, smb_buf, 0x44,
1587                                 (struct sockaddr *)psin_server);
1588                         kfree(ses_init_buf);
1589                         msleep(1); /* RFC1001 layer in at least one server
1590                                       requires very short break before negprot
1591                                       presumably because not expecting negprot
1592                                       to follow so fast.  This is a simple
1593                                       solution that works without
1594                                       complicating the code and causes no
1595                                       significant slowing down on mount
1596                                       for everyone else */
1597                 }
1598                 /* else the negprot may still work without this
1599                 even though malloc failed */
1600
1601         }
1602
1603         return rc;
1604 }
1605
1606 static int
1607 ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
1608 {
1609         int rc = 0;
1610         int connected = 0;
1611         __be16 orig_port = 0;
1612
1613         if (*csocket == NULL) {
1614                 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
1615                                       IPPROTO_TCP, csocket);
1616                 if (rc < 0) {
1617                         cERROR(1, ("Error %d creating ipv6 socket", rc));
1618                         *csocket = NULL;
1619                         return rc;
1620                 } else {
1621                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1622                          cFYI(1, ("ipv6 Socket created"));
1623                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1624                 }
1625         }
1626
1627         psin_server->sin6_family = AF_INET6;
1628
1629         if (psin_server->sin6_port) { /* user overrode default port */
1630                 rc = (*csocket)->ops->connect(*csocket,
1631                                 (struct sockaddr *) psin_server,
1632                                 sizeof(struct sockaddr_in6), 0);
1633                 if (rc >= 0)
1634                         connected = 1;
1635         }
1636
1637         if (!connected) {
1638                 /* save original port so we can retry user specified port
1639                         later if fall back ports fail this time  */
1640
1641                 orig_port = psin_server->sin6_port;
1642                 /* do not retry on the same port we just failed on */
1643                 if (psin_server->sin6_port != htons(CIFS_PORT)) {
1644                         psin_server->sin6_port = htons(CIFS_PORT);
1645
1646                         rc = (*csocket)->ops->connect(*csocket,
1647                                         (struct sockaddr *) psin_server,
1648                                         sizeof(struct sockaddr_in6), 0);
1649                         if (rc >= 0)
1650                                 connected = 1;
1651                 }
1652         }
1653         if (!connected) {
1654                 psin_server->sin6_port = htons(RFC1001_PORT);
1655                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1656                                  psin_server, sizeof(struct sockaddr_in6), 0);
1657                 if (rc >= 0)
1658                         connected = 1;
1659         }
1660
1661         /* give up here - unless we want to retry on different
1662                 protocol families some day */
1663         if (!connected) {
1664                 if (orig_port)
1665                         psin_server->sin6_port = orig_port;
1666                 cFYI(1, ("Error %d connecting to server via ipv6", rc));
1667                 sock_release(*csocket);
1668                 *csocket = NULL;
1669                 return rc;
1670         }
1671         /* Eventually check for other socket options to change from
1672                 the default. sock_setsockopt not used because it expects
1673                 user space buffer */
1674         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1675
1676         return rc;
1677 }
1678
1679 void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
1680                           struct super_block *sb, struct smb_vol *vol_info)
1681 {
1682         /* if we are reconnecting then should we check to see if
1683          * any requested capabilities changed locally e.g. via
1684          * remount but we can not do much about it here
1685          * if they have (even if we could detect it by the following)
1686          * Perhaps we could add a backpointer to array of sb from tcon
1687          * or if we change to make all sb to same share the same
1688          * sb as NFS - then we only have one backpointer to sb.
1689          * What if we wanted to mount the server share twice once with
1690          * and once without posixacls or posix paths? */
1691         __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1692
1693         if (vol_info && vol_info->no_linux_ext) {
1694                 tcon->fsUnixInfo.Capability = 0;
1695                 tcon->unix_ext = 0; /* Unix Extensions disabled */
1696                 cFYI(1, ("Linux protocol extensions disabled"));
1697                 return;
1698         } else if (vol_info)
1699                 tcon->unix_ext = 1; /* Unix Extensions supported */
1700
1701         if (tcon->unix_ext == 0) {
1702                 cFYI(1, ("Unix extensions disabled so not set on reconnect"));
1703                 return;
1704         }
1705
1706         if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
1707                 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1708
1709                 /* check for reconnect case in which we do not
1710                    want to change the mount behavior if we can avoid it */
1711                 if (vol_info == NULL) {
1712                         /* turn off POSIX ACL and PATHNAMES if not set
1713                            originally at mount time */
1714                         if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
1715                                 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1716                         if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
1717                                 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
1718                                         cERROR(1, ("POSIXPATH support change"));
1719                                 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1720                         } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
1721                                 cERROR(1, ("possible reconnect error"));
1722                                 cERROR(1,
1723                                         ("server disabled POSIX path support"));
1724                         }
1725                 }
1726
1727                 cap &= CIFS_UNIX_CAP_MASK;
1728                 if (vol_info && vol_info->no_psx_acl)
1729                         cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1730                 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
1731                         cFYI(1, ("negotiated posix acl support"));
1732                         if (sb)
1733                                 sb->s_flags |= MS_POSIXACL;
1734                 }
1735
1736                 if (vol_info && vol_info->posix_paths == 0)
1737                         cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1738                 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
1739                         cFYI(1, ("negotiate posix pathnames"));
1740                         if (sb)
1741                                 CIFS_SB(sb)->mnt_cifs_flags |=
1742                                         CIFS_MOUNT_POSIX_PATHS;
1743                 }
1744
1745                 /* We might be setting the path sep back to a different
1746                 form if we are reconnecting and the server switched its
1747                 posix path capability for this share */
1748                 if (sb && (CIFS_SB(sb)->prepathlen > 0))
1749                         CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
1750
1751                 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
1752                         if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
1753                                 CIFS_SB(sb)->rsize = 127 * 1024;
1754                                 cFYI(DBG2,
1755                                         ("larger reads not supported by srv"));
1756                         }
1757                 }
1758
1759
1760                 cFYI(1, ("Negotiate caps 0x%x", (int)cap));
1761 #ifdef CONFIG_CIFS_DEBUG2
1762                 if (cap & CIFS_UNIX_FCNTL_CAP)
1763                         cFYI(1, ("FCNTL cap"));
1764                 if (cap & CIFS_UNIX_EXTATTR_CAP)
1765                         cFYI(1, ("EXTATTR cap"));
1766                 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
1767                         cFYI(1, ("POSIX path cap"));
1768                 if (cap & CIFS_UNIX_XATTR_CAP)
1769                         cFYI(1, ("XATTR cap"));
1770                 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
1771                         cFYI(1, ("POSIX ACL cap"));
1772                 if (cap & CIFS_UNIX_LARGE_READ_CAP)
1773                         cFYI(1, ("very large read cap"));
1774                 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
1775                         cFYI(1, ("very large write cap"));
1776 #endif /* CIFS_DEBUG2 */
1777                 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
1778                         if (vol_info == NULL) {
1779                                 cFYI(1, ("resetting capabilities failed"));
1780                         } else
1781                                 cERROR(1, ("Negotiating Unix capabilities "
1782                                            "with the server failed.  Consider "
1783                                            "mounting with the Unix Extensions\n"
1784                                            "disabled, if problems are found, "
1785                                            "by specifying the nounix mount "
1786                                            "option."));
1787
1788                 }
1789         }
1790 }
1791
1792 static void
1793 convert_delimiter(char *path, char delim)
1794 {
1795         int i;
1796         char old_delim;
1797
1798         if (path == NULL)
1799                 return;
1800
1801         if (delim == '/')
1802                 old_delim = '\\';
1803         else
1804                 old_delim = '/';
1805
1806         for (i = 0; path[i] != '\0'; i++) {
1807                 if (path[i] == old_delim)
1808                         path[i] = delim;
1809         }
1810 }
1811
1812 int
1813 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
1814            char *mount_data, const char *devname)
1815 {
1816         int rc = 0;
1817         int xid;
1818         int address_type = AF_INET;
1819         struct socket *csocket = NULL;
1820         struct sockaddr_in sin_server;
1821         struct sockaddr_in6 sin_server6;
1822         struct smb_vol volume_info;
1823         struct cifsSesInfo *pSesInfo = NULL;
1824         struct cifsSesInfo *existingCifsSes = NULL;
1825         struct cifsTconInfo *tcon = NULL;
1826         struct TCP_Server_Info *srvTcp = NULL;
1827
1828         xid = GetXid();
1829
1830 /* cFYI(1, ("Entering cifs_mount. Xid: %d with: %s", xid, mount_data)); */
1831
1832         memset(&volume_info, 0, sizeof(struct smb_vol));
1833         if (cifs_parse_mount_options(mount_data, devname, &volume_info)) {
1834                 rc = -EINVAL;
1835                 goto out;
1836         }
1837
1838         if (volume_info.nullauth) {
1839                 cFYI(1, ("null user"));
1840                 volume_info.username = "";
1841         } else if (volume_info.username) {
1842                 /* BB fixme parse for domain name here */
1843                 cFYI(1, ("Username: %s", volume_info.username));
1844         } else {
1845                 cifserror("No username specified");
1846         /* In userspace mount helper we can get user name from alternate
1847            locations such as env variables and files on disk */
1848                 rc = -EINVAL;
1849                 goto out;
1850         }
1851
1852         if (volume_info.UNCip && volume_info.UNC) {
1853                 rc = cifs_inet_pton(AF_INET, volume_info.UNCip,
1854                                     &sin_server.sin_addr.s_addr);
1855
1856                 if (rc <= 0) {
1857                         /* not ipv4 address, try ipv6 */
1858                         rc = cifs_inet_pton(AF_INET6, volume_info.UNCip,
1859                                             &sin_server6.sin6_addr.in6_u);
1860                         if (rc > 0)
1861                                 address_type = AF_INET6;
1862                 } else {
1863                         address_type = AF_INET;
1864                 }
1865
1866                 if (rc <= 0) {
1867                         /* we failed translating address */
1868                         rc = -EINVAL;
1869                         goto out;
1870                 }
1871
1872                 cFYI(1, ("UNC: %s ip: %s", volume_info.UNC, volume_info.UNCip));
1873                 /* success */
1874                 rc = 0;
1875         } else if (volume_info.UNCip) {
1876                 /* BB using ip addr as server name to connect to the
1877                    DFS root below */
1878                 cERROR(1, ("Connecting to DFS root not implemented yet"));
1879                 rc = -EINVAL;
1880                 goto out;
1881         } else /* which servers DFS root would we conect to */ {
1882                 cERROR(1,
1883                        ("CIFS mount error: No UNC path (e.g. -o "
1884                         "unc=//192.168.1.100/public) specified"));
1885                 rc = -EINVAL;
1886                 goto out;
1887         }
1888
1889         /* this is needed for ASCII cp to Unicode converts */
1890         if (volume_info.iocharset == NULL) {
1891                 cifs_sb->local_nls = load_nls_default();
1892         /* load_nls_default can not return null */
1893         } else {
1894                 cifs_sb->local_nls = load_nls(volume_info.iocharset);
1895                 if (cifs_sb->local_nls == NULL) {
1896                         cERROR(1, ("CIFS mount error: iocharset %s not found",
1897                                  volume_info.iocharset));
1898                         rc = -ELIBACC;
1899                         goto out;
1900                 }
1901         }
1902
1903         if (address_type == AF_INET)
1904                 existingCifsSes = cifs_find_tcp_session(&sin_server.sin_addr,
1905                         NULL /* no ipv6 addr */,
1906                         volume_info.username, &srvTcp);
1907         else if (address_type == AF_INET6) {
1908                 cFYI(1, ("looking for ipv6 address"));
1909                 existingCifsSes = cifs_find_tcp_session(NULL /* no ipv4 addr */,
1910                         &sin_server6.sin6_addr,
1911                         volume_info.username, &srvTcp);
1912         } else {
1913                 rc = -EINVAL;
1914                 goto out;
1915         }
1916
1917         if (srvTcp) {
1918                 cFYI(1, ("Existing tcp session with server found"));
1919         } else {        /* create socket */
1920                 if (volume_info.port)
1921                         sin_server.sin_port = htons(volume_info.port);
1922                 else
1923                         sin_server.sin_port = 0;
1924                 if (address_type == AF_INET6) {
1925                         cFYI(1, ("attempting ipv6 connect"));
1926                         /* BB should we allow ipv6 on port 139? */
1927                         /* other OS never observed in Wild doing 139 with v6 */
1928                         rc = ipv6_connect(&sin_server6, &csocket);
1929                 } else
1930                         rc = ipv4_connect(&sin_server, &csocket,
1931                                   volume_info.source_rfc1001_name,
1932                                   volume_info.target_rfc1001_name);
1933                 if (rc < 0) {
1934                         cERROR(1, ("Error connecting to IPv4 socket. "
1935                                    "Aborting operation"));
1936                         if (csocket != NULL)
1937                                 sock_release(csocket);
1938                         goto out;
1939                 }
1940
1941                 srvTcp = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1942                 if (!srvTcp) {
1943                         rc = -ENOMEM;
1944                         sock_release(csocket);
1945                         goto out;
1946                 } else {
1947                         memcpy(&srvTcp->addr.sockAddr, &sin_server,
1948                                 sizeof(struct sockaddr_in));
1949                         atomic_set(&srvTcp->inFlight, 0);
1950                         /* BB Add code for ipv6 case too */
1951                         srvTcp->ssocket = csocket;
1952                         srvTcp->protocolType = IPV4;
1953                         srvTcp->hostname = extract_hostname(volume_info.UNC);
1954                         if (IS_ERR(srvTcp->hostname)) {
1955                                 rc = PTR_ERR(srvTcp->hostname);
1956                                 sock_release(csocket);
1957                                 goto out;
1958                         }
1959                         init_waitqueue_head(&srvTcp->response_q);
1960                         init_waitqueue_head(&srvTcp->request_q);
1961                         INIT_LIST_HEAD(&srvTcp->pending_mid_q);
1962                         /* at this point we are the only ones with the pointer
1963                         to the struct since the kernel thread not created yet
1964                         so no need to spinlock this init of tcpStatus */
1965                         srvTcp->tcpStatus = CifsNew;
1966                         init_MUTEX(&srvTcp->tcpSem);
1967                         srvTcp->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, srvTcp, "cifsd");
1968                         if (IS_ERR(srvTcp->tsk)) {
1969                                 rc = PTR_ERR(srvTcp->tsk);
1970                                 cERROR(1, ("error %d create cifsd thread", rc));
1971                                 srvTcp->tsk = NULL;
1972                                 sock_release(csocket);
1973                                 kfree(srvTcp->hostname);
1974                                 goto out;
1975                         }
1976                         rc = 0;
1977                         memcpy(srvTcp->workstation_RFC1001_name,
1978                                 volume_info.source_rfc1001_name, 16);
1979                         memcpy(srvTcp->server_RFC1001_name,
1980                                 volume_info.target_rfc1001_name, 16);
1981                         srvTcp->sequence_number = 0;
1982                 }
1983         }
1984
1985         if (existingCifsSes) {
1986                 pSesInfo = existingCifsSes;
1987                 cFYI(1, ("Existing smb sess found (status=%d)",
1988                         pSesInfo->status));
1989                 down(&pSesInfo->sesSem);
1990                 if (pSesInfo->status == CifsNeedReconnect) {
1991                         cFYI(1, ("Session needs reconnect"));
1992                         rc = cifs_setup_session(xid, pSesInfo,
1993                                                 cifs_sb->local_nls);
1994                 }
1995                 up(&pSesInfo->sesSem);
1996         } else if (!rc) {
1997                 cFYI(1, ("Existing smb sess not found"));
1998                 pSesInfo = sesInfoAlloc();
1999                 if (pSesInfo == NULL)
2000                         rc = -ENOMEM;
2001                 else {
2002                         pSesInfo->server = srvTcp;
2003                         sprintf(pSesInfo->serverName, "%u.%u.%u.%u",
2004                                 NIPQUAD(sin_server.sin_addr.s_addr));
2005                 }
2006
2007                 if (!rc) {
2008                         /* volume_info.password freed at unmount */
2009                         if (volume_info.password) {
2010                                 pSesInfo->password = volume_info.password;
2011                                 /* set to NULL to prevent freeing on exit */
2012                                 volume_info.password = NULL;
2013                         }
2014                         if (volume_info.username)
2015                                 strncpy(pSesInfo->userName,
2016                                         volume_info.username,
2017                                         MAX_USERNAME_SIZE);
2018                         if (volume_info.domainname) {
2019                                 int len = strlen(volume_info.domainname);
2020                                 pSesInfo->domainName =
2021                                         kmalloc(len + 1, GFP_KERNEL);
2022                                 if (pSesInfo->domainName)
2023                                         strcpy(pSesInfo->domainName,
2024                                                 volume_info.domainname);
2025                         }
2026                         pSesInfo->linux_uid = volume_info.linux_uid;
2027                         pSesInfo->overrideSecFlg = volume_info.secFlg;
2028                         down(&pSesInfo->sesSem);
2029                         /* BB FIXME need to pass vol->secFlgs BB */
2030                         rc = cifs_setup_session(xid, pSesInfo,
2031                                                 cifs_sb->local_nls);
2032                         up(&pSesInfo->sesSem);
2033                         if (!rc)
2034                                 atomic_inc(&srvTcp->socketUseCount);
2035                 }
2036         }
2037
2038         /* search for existing tcon to this server share */
2039         if (!rc) {
2040                 if (volume_info.rsize > CIFSMaxBufSize) {
2041                         cERROR(1, ("rsize %d too large, using MaxBufSize",
2042                                 volume_info.rsize));
2043                         cifs_sb->rsize = CIFSMaxBufSize;
2044                 } else if ((volume_info.rsize) &&
2045                                 (volume_info.rsize <= CIFSMaxBufSize))
2046                         cifs_sb->rsize = volume_info.rsize;
2047                 else /* default */
2048                         cifs_sb->rsize = CIFSMaxBufSize;
2049
2050                 if (volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
2051                         cERROR(1, ("wsize %d too large, using 4096 instead",
2052                                   volume_info.wsize));
2053                         cifs_sb->wsize = 4096;
2054                 } else if (volume_info.wsize)
2055                         cifs_sb->wsize = volume_info.wsize;
2056                 else
2057                         cifs_sb->wsize =
2058                                 min_t(const int, PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2059                                         127*1024);
2060                         /* old default of CIFSMaxBufSize was too small now
2061                            that SMB Write2 can send multiple pages in kvec.
2062                            RFC1001 does not describe what happens when frame
2063                            bigger than 128K is sent so use that as max in
2064                            conjunction with 52K kvec constraint on arch with 4K
2065                            page size  */
2066
2067                 if (cifs_sb->rsize < 2048) {
2068                         cifs_sb->rsize = 2048;
2069                         /* Windows ME may prefer this */
2070                         cFYI(1, ("readsize set to minimum: 2048"));
2071                 }
2072                 /* calculate prepath */
2073                 cifs_sb->prepath = volume_info.prepath;
2074                 if (cifs_sb->prepath) {
2075                         cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2076                         /* we can not convert the / to \ in the path
2077                         separators in the prefixpath yet because we do not
2078                         know (until reset_cifs_unix_caps is called later)
2079                         whether POSIX PATH CAP is available. We normalize
2080                         the / to \ after reset_cifs_unix_caps is called */
2081                         volume_info.prepath = NULL;
2082                 } else
2083                         cifs_sb->prepathlen = 0;
2084                 cifs_sb->mnt_uid = volume_info.linux_uid;
2085                 cifs_sb->mnt_gid = volume_info.linux_gid;
2086                 cifs_sb->mnt_file_mode = volume_info.file_mode;
2087                 cifs_sb->mnt_dir_mode = volume_info.dir_mode;
2088                 cFYI(1, ("file mode: 0x%x  dir mode: 0x%x",
2089                         cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode));
2090
2091                 if (volume_info.noperm)
2092                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2093                 if (volume_info.setuids)
2094                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2095                 if (volume_info.server_ino)
2096                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2097                 if (volume_info.remap)
2098                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2099                 if (volume_info.no_xattr)
2100                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2101                 if (volume_info.sfu_emul)
2102                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2103                 if (volume_info.nobrl)
2104                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2105                 if (volume_info.cifs_acl)
2106                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2107                 if (volume_info.override_uid)
2108                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2109                 if (volume_info.override_gid)
2110                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2111                 if (volume_info.dynperm)
2112                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
2113                 if (volume_info.direct_io) {
2114                         cFYI(1, ("mounting share using direct i/o"));
2115                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2116                 }
2117
2118                 tcon =
2119                     find_unc(sin_server.sin_addr.s_addr, volume_info.UNC,
2120                              volume_info.username);
2121                 if (tcon) {
2122                         cFYI(1, ("Found match on UNC path"));
2123                         /* we can have only one retry value for a connection
2124                            to a share so for resources mounted more than once
2125                            to the same server share the last value passed in
2126                            for the retry flag is used */
2127                         tcon->retry = volume_info.retry;
2128                         tcon->nocase = volume_info.nocase;
2129                 } else {
2130                         tcon = tconInfoAlloc();
2131                         if (tcon == NULL)
2132                                 rc = -ENOMEM;
2133                         else {
2134                                 /* check for null share name ie connecting to
2135                                  * dfs root */
2136
2137                                 /* BB check if this works for exactly length
2138                                  * three strings */
2139                                 if ((strchr(volume_info.UNC + 3, '\\') == NULL)
2140                                     && (strchr(volume_info.UNC + 3, '/') ==
2141                                         NULL)) {
2142 /*                                      rc = connect_to_dfs_path(xid, pSesInfo,
2143                                                 "", cifs_sb->local_nls,
2144                                                 cifs_sb->mnt_cifs_flags &
2145                                                   CIFS_MOUNT_MAP_SPECIAL_CHR);*/
2146                                         cFYI(1, ("DFS root not supported"));
2147                                         rc = -ENODEV;
2148                                         goto out;
2149                                 } else {
2150                                         /* BB Do we need to wrap sesSem around
2151                                          * this TCon call and Unix SetFS as
2152                                          * we do on SessSetup and reconnect? */
2153                                         rc = CIFSTCon(xid, pSesInfo,
2154                                                 volume_info.UNC,
2155                                                 tcon, cifs_sb->local_nls);
2156                                         cFYI(1, ("CIFS Tcon rc = %d", rc));
2157                                 }
2158                                 if (!rc) {
2159                                         atomic_inc(&pSesInfo->inUse);
2160                                         tcon->retry = volume_info.retry;
2161                                         tcon->nocase = volume_info.nocase;
2162                                 }
2163                         }
2164                 }
2165         }
2166         if (pSesInfo) {
2167                 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
2168                         sb->s_maxbytes = (u64) 1 << 63;
2169                 } else
2170                         sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
2171         }
2172
2173         /* BB FIXME fix time_gran to be larger for LANMAN sessions */
2174         sb->s_time_gran = 100;
2175
2176 /* on error free sesinfo and tcon struct if needed */
2177         if (rc) {
2178                 /* if session setup failed, use count is zero but
2179                 we still need to free cifsd thread */
2180                 if (atomic_read(&srvTcp->socketUseCount) == 0) {
2181                         spin_lock(&GlobalMid_Lock);
2182                         srvTcp->tcpStatus = CifsExiting;
2183                         spin_unlock(&GlobalMid_Lock);
2184                         if (srvTcp->tsk) {
2185                                 /* If we could verify that kthread_stop would
2186                                    always wake up processes blocked in
2187                                    tcp in recv_mesg then we could remove the
2188                                    send_sig call */
2189                                 force_sig(SIGKILL, srvTcp->tsk);
2190                                 kthread_stop(srvTcp->tsk);
2191                         }
2192                 }
2193                  /* If find_unc succeeded then rc == 0 so we can not end */
2194                 if (tcon)  /* up accidently freeing someone elses tcon struct */
2195                         tconInfoFree(tcon);
2196                 if (existingCifsSes == NULL) {
2197                         if (pSesInfo) {
2198                                 if ((pSesInfo->server) &&
2199                                     (pSesInfo->status == CifsGood)) {
2200                                         int temp_rc;
2201                                         temp_rc = CIFSSMBLogoff(xid, pSesInfo);
2202                                         /* if the socketUseCount is now zero */
2203                                         if ((temp_rc == -ESHUTDOWN) &&
2204                                             (pSesInfo->server) &&
2205                                             (pSesInfo->server->tsk)) {
2206                                                 force_sig(SIGKILL,
2207                                                         pSesInfo->server->tsk);
2208                                                 kthread_stop(pSesInfo->server->tsk);
2209                                         }
2210                                 } else {
2211                                         cFYI(1, ("No session or bad tcon"));
2212                                         if ((pSesInfo->server) &&
2213                                             (pSesInfo->server->tsk)) {
2214                                                 force_sig(SIGKILL,
2215                                                         pSesInfo->server->tsk);
2216                                                 kthread_stop(pSesInfo->server->tsk);
2217                                         }
2218                                 }
2219                                 sesInfoFree(pSesInfo);
2220                                 /* pSesInfo = NULL; */
2221                         }
2222                 }
2223         } else {
2224                 atomic_inc(&tcon->useCount);
2225                 cifs_sb->tcon = tcon;
2226                 tcon->ses = pSesInfo;
2227
2228                 /* do not care if following two calls succeed - informational */
2229                 if (!tcon->ipc) {
2230                         CIFSSMBQFSDeviceInfo(xid, tcon);
2231                         CIFSSMBQFSAttributeInfo(xid, tcon);
2232                 }
2233
2234                 /* tell server which Unix caps we support */
2235                 if (tcon->ses->capabilities & CAP_UNIX)
2236                         /* reset of caps checks mount to see if unix extensions
2237                            disabled for just this mount */
2238                         reset_cifs_unix_caps(xid, tcon, sb, &volume_info);
2239                 else
2240                         tcon->unix_ext = 0; /* server does not support them */
2241
2242                 /* convert forward to back slashes in prepath here if needed */
2243                 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2244                         convert_delimiter(cifs_sb->prepath,
2245                                           CIFS_DIR_SEP(cifs_sb));
2246
2247                 if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2248                         cifs_sb->rsize = 1024 * 127;
2249                         cFYI(DBG2,
2250                                 ("no very large read support, rsize now 127K"));
2251                 }
2252                 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2253                         cifs_sb->wsize = min(cifs_sb->wsize,
2254                                              (tcon->ses->server->maxBuf -
2255                                               MAX_CIFS_HDR_SIZE));
2256                 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2257                         cifs_sb->rsize = min(cifs_sb->rsize,
2258                                              (tcon->ses->server->maxBuf -
2259                                               MAX_CIFS_HDR_SIZE));
2260         }
2261
2262         /* volume_info.password is freed above when existing session found
2263         (in which case it is not needed anymore) but when new sesion is created
2264         the password ptr is put in the new session structure (in which case the
2265         password will be freed at unmount time) */
2266 out:
2267         /* zero out password before freeing */
2268         if (volume_info.password != NULL) {
2269                 memset(volume_info.password, 0, strlen(volume_info.password));
2270                 kfree(volume_info.password);
2271         }
2272         kfree(volume_info.UNC);
2273         kfree(volume_info.prepath);
2274         FreeXid(xid);
2275         return rc;
2276 }
2277
2278 static int
2279 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2280               char session_key[CIFS_SESS_KEY_SIZE],
2281               const struct nls_table *nls_codepage)
2282 {
2283         struct smb_hdr *smb_buffer;
2284         struct smb_hdr *smb_buffer_response;
2285         SESSION_SETUP_ANDX *pSMB;
2286         SESSION_SETUP_ANDX *pSMBr;
2287         char *bcc_ptr;
2288         char *user;
2289         char *domain;
2290         int rc = 0;
2291         int remaining_words = 0;
2292         int bytes_returned = 0;
2293         int len;
2294         __u32 capabilities;
2295         __u16 count;
2296
2297         cFYI(1, ("In sesssetup"));
2298         if (ses == NULL)
2299                 return -EINVAL;
2300         user = ses->userName;
2301         domain = ses->domainName;
2302         smb_buffer = cifs_buf_get();
2303
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, bool *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, bool 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                 DeleteTconOplockQEntries(cifs_sb->tcon);
3516                 tconInfoFree(cifs_sb->tcon);
3517                 if ((ses) && (ses->server)) {
3518                         /* save off task so we do not refer to ses later */
3519                         cifsd_task = ses->server->tsk;
3520                         cFYI(1, ("About to do SMBLogoff "));
3521                         rc = CIFSSMBLogoff(xid, ses);
3522                         if (rc == -EBUSY) {
3523                                 FreeXid(xid);
3524                                 return 0;
3525                         } else if (rc == -ESHUTDOWN) {
3526                                 cFYI(1, ("Waking up socket by sending signal"));
3527                                 if (cifsd_task) {
3528                                         force_sig(SIGKILL, cifsd_task);
3529                                         kthread_stop(cifsd_task);
3530                                 }
3531                                 rc = 0;
3532                         } /* else - we have an smb session
3533                                 left on this socket do not kill cifsd */
3534                 } else
3535                         cFYI(1, ("No session or bad tcon"));
3536         }
3537
3538         cifs_sb->tcon = NULL;
3539         tmp = cifs_sb->prepath;
3540         cifs_sb->prepathlen = 0;
3541         cifs_sb->prepath = NULL;
3542         kfree(tmp);
3543         if (ses)
3544                 sesInfoFree(ses);
3545
3546         FreeXid(xid);
3547         return rc;
3548 }
3549
3550 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3551                                            struct nls_table *nls_info)
3552 {
3553         int rc = 0;
3554         char ntlm_session_key[CIFS_SESS_KEY_SIZE];
3555         bool ntlmv2_flag = false;
3556         int first_time = 0;
3557
3558         /* what if server changes its buffer size after dropping the session? */
3559         if (pSesInfo->server->maxBuf == 0) /* no need to send on reconnect */ {
3560                 rc = CIFSSMBNegotiate(xid, pSesInfo);
3561                 if (rc == -EAGAIN) /* retry only once on 1st time connection */ {
3562                         rc = CIFSSMBNegotiate(xid, pSesInfo);
3563                         if (rc == -EAGAIN)
3564                                 rc = -EHOSTDOWN;
3565                 }
3566                 if (rc == 0) {
3567                         spin_lock(&GlobalMid_Lock);
3568                         if (pSesInfo->server->tcpStatus != CifsExiting)
3569                                 pSesInfo->server->tcpStatus = CifsGood;
3570                         else
3571                                 rc = -EHOSTDOWN;
3572                         spin_unlock(&GlobalMid_Lock);
3573
3574                 }
3575                 first_time = 1;
3576         }
3577         if (!rc) {
3578                 pSesInfo->flags = 0;
3579                 pSesInfo->capabilities = pSesInfo->server->capabilities;
3580                 if (linuxExtEnabled == 0)
3581                         pSesInfo->capabilities &= (~CAP_UNIX);
3582         /*      pSesInfo->sequence_number = 0;*/
3583                 cFYI(1,
3584                       ("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3585                         pSesInfo->server->secMode,
3586                         pSesInfo->server->capabilities,
3587                         pSesInfo->server->timeAdj));
3588                 if (experimEnabled < 2)
3589                         rc = CIFS_SessSetup(xid, pSesInfo,
3590                                             first_time, nls_info);
3591                 else if (extended_security
3592                                 && (pSesInfo->capabilities
3593                                         & CAP_EXTENDED_SECURITY)
3594                                 && (pSesInfo->server->secType == NTLMSSP)) {
3595                         rc = -EOPNOTSUPP;
3596                 } else if (extended_security
3597                            && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3598                            && (pSesInfo->server->secType == RawNTLMSSP)) {
3599                         cFYI(1, ("NTLMSSP sesssetup"));
3600                         rc = CIFSNTLMSSPNegotiateSessSetup(xid,
3601                                                 pSesInfo,
3602                                                 &ntlmv2_flag,
3603                                                 nls_info);
3604                         if (!rc) {
3605                                 if (ntlmv2_flag) {
3606                                         char *v2_response;
3607                                         cFYI(1, ("more secure NTLM ver2 hash"));
3608                                         if (CalcNTLMv2_partial_mac_key(pSesInfo,
3609                                                 nls_info)) {
3610                                                 rc = -ENOMEM;
3611                                                 goto ss_err_exit;
3612                                         } else
3613                                                 v2_response = kmalloc(16 + 64 /* blob */, GFP_KERNEL);
3614                                         if (v2_response) {
3615                                                 CalcNTLMv2_response(pSesInfo,
3616                                                                    v2_response);
3617                                 /*              if (first_time)
3618                                                   cifs_calculate_ntlmv2_mac_key(
3619                                                    pSesInfo->server->mac_signing_key,
3620                                                    response, ntlm_session_key,*/
3621                                                 kfree(v2_response);
3622                                         /* BB Put dummy sig in SessSetup PDU? */
3623                                         } else {
3624                                                 rc = -ENOMEM;
3625                                                 goto ss_err_exit;
3626                                         }
3627
3628                                 } else {
3629                                         SMBNTencrypt(pSesInfo->password,
3630                                                 pSesInfo->server->cryptKey,
3631                                                 ntlm_session_key);
3632
3633                                         if (first_time)
3634                                                 cifs_calculate_mac_key(
3635                                                         &pSesInfo->server->mac_signing_key,
3636                                                         ntlm_session_key,
3637                                                         pSesInfo->password);
3638                                 }
3639                         /* for better security the weaker lanman hash not sent
3640                            in AuthSessSetup so we no longer calculate it */
3641
3642                                 rc = CIFSNTLMSSPAuthSessSetup(xid,
3643                                         pSesInfo,
3644                                         ntlm_session_key,
3645                                         ntlmv2_flag,
3646                                         nls_info);
3647                         }
3648                 } else { /* old style NTLM 0.12 session setup */
3649                         SMBNTencrypt(pSesInfo->password,
3650                                 pSesInfo->server->cryptKey,
3651                                 ntlm_session_key);
3652
3653                         if (first_time)
3654                                 cifs_calculate_mac_key(
3655                                         &pSesInfo->server->mac_signing_key,
3656                                         ntlm_session_key, pSesInfo->password);
3657
3658                         rc = CIFSSessSetup(xid, pSesInfo,
3659                                 ntlm_session_key, nls_info);
3660                 }
3661                 if (rc) {
3662                         cERROR(1, ("Send error in SessSetup = %d", rc));
3663                 } else {
3664                         cFYI(1, ("CIFS Session Established successfully"));
3665                         pSesInfo->status = CifsGood;
3666                 }
3667         }
3668 ss_err_exit:
3669         return rc;
3670 }
3671