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

   1 /*
   2  *   fs/cifs/connect.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2008
   5  *   Author(s): Steve French (sfrench@us.ibm.com)
   6  *
   7  *   This library is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU Lesser General Public License as published
   9  *   by the Free Software Foundation; either version 2.1 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This library is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  15  *   the GNU Lesser General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU Lesser General Public License
  18  *   along with this library; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21 #include <linux/fs.h>
  22 #include <linux/net.h>
  23 #include <linux/string.h>
  24 #include <linux/list.h>
  25 #include <linux/wait.h>
  26 #include <linux/ipv6.h>
  27 #include <linux/pagemap.h>
  28 #include <linux/ctype.h>
  29 #include <linux/utsname.h>
  30 #include <linux/mempool.h>
  31 #include <linux/delay.h>
  32 #include <linux/completion.h>
  33 #include <linux/kthread.h>
  34 #include <linux/pagevec.h>
  35 #include <linux/freezer.h>
  36 #include <asm/uaccess.h>
  37 #include <asm/processor.h>
  38 #include "cifspdu.h"
  39 #include "cifsglob.h"
  40 #include "cifsproto.h"
  41 #include "cifs_unicode.h"
  42 #include "cifs_debug.h"
  43 #include "cifs_fs_sb.h"
  44 #include "ntlmssp.h"
  45 #include "nterr.h"
  46 #include "rfc1002pdu.h"
  47 #include "cn_cifs.h"
  48
  49 #define CIFS_PORT 445
  50 #define RFC1001_PORT 139
  51
  52 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         unsigned char *targetUNCs;
1429
1430         *pnum_referrals = 0;
1431         *preferrals = NULL;
1432
1433         if (pSesInfo->ipc_tid == 0) {
1434                 temp_unc = kmalloc(2 /* for slashes */ +
1435                         strnlen(pSesInfo->serverName,
1436                                 SERVER_NAME_LEN_WITH_NULL * 2)
1437                                  + 1 + 4 /* slash IPC$ */  + 2,
1438                                 GFP_KERNEL);
1439                 if (temp_unc == NULL)
1440                         return -ENOMEM;
1441                 temp_unc[0] = '\\';
1442                 temp_unc[1] = '\\';
1443                 strcpy(temp_unc + 2, pSesInfo->serverName);
1444                 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1445                 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1446                 cFYI(1,
1447                      ("CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid));
1448                 kfree(temp_unc);
1449         }
1450         if (rc == 0)
1451                 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, &targetUNCs,
1452                                      pnum_referrals, nls_codepage, remap);
1453         /* BB map targetUNCs to dfs_info3 structures, here or
1454                 in CIFSGetDFSRefer BB */
1455
1456         return rc;
1457 }
1458
1459 /* See RFC1001 section 14 on representation of Netbios names */
1460 static void rfc1002mangle(char *target, char *source, unsigned int length)
1461 {
1462         unsigned int i, j;
1463
1464         for (i = 0, j = 0; i < (length); i++) {
1465                 /* mask a nibble at a time and encode */
1466                 target[j] = 'A' + (0x0F & (source[i] >> 4));
1467                 target[j+1] = 'A' + (0x0F & source[i]);
1468                 j += 2;
1469         }
1470
1471 }
1472
1473
1474 static int
1475 ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
1476              char *netbios_name, char *target_name)
1477 {
1478         int rc = 0;
1479         int connected = 0;
1480         __be16 orig_port = 0;
1481
1482         if (*csocket == NULL) {
1483                 rc = sock_create_kern(PF_INET, SOCK_STREAM,
1484                                       IPPROTO_TCP, csocket);
1485                 if (rc < 0) {
1486                         cERROR(1, ("Error %d creating socket", rc));
1487                         *csocket = NULL;
1488                         return rc;
1489                 } else {
1490                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1491                         cFYI(1, ("Socket created"));
1492                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1493                 }
1494         }
1495
1496         psin_server->sin_family = AF_INET;
1497         if (psin_server->sin_port) { /* user overrode default port */
1498                 rc = (*csocket)->ops->connect(*csocket,
1499                                 (struct sockaddr *) psin_server,
1500                                 sizeof(struct sockaddr_in), 0);
1501                 if (rc >= 0)
1502                         connected = 1;
1503         }
1504
1505         if (!connected) {
1506                 /* save original port so we can retry user specified port
1507                         later if fall back ports fail this time  */
1508                 orig_port = psin_server->sin_port;
1509
1510                 /* do not retry on the same port we just failed on */
1511                 if (psin_server->sin_port != htons(CIFS_PORT)) {
1512                         psin_server->sin_port = htons(CIFS_PORT);
1513
1514                         rc = (*csocket)->ops->connect(*csocket,
1515                                         (struct sockaddr *) psin_server,
1516                                         sizeof(struct sockaddr_in), 0);
1517                         if (rc >= 0)
1518                                 connected = 1;
1519                 }
1520         }
1521         if (!connected) {
1522                 psin_server->sin_port = htons(RFC1001_PORT);
1523                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1524                                               psin_server,
1525                                               sizeof(struct sockaddr_in), 0);
1526                 if (rc >= 0)
1527                         connected = 1;
1528         }
1529
1530         /* give up here - unless we want to retry on different
1531                 protocol families some day */
1532         if (!connected) {
1533                 if (orig_port)
1534                         psin_server->sin_port = orig_port;
1535                 cFYI(1, ("Error %d connecting to server via ipv4", rc));
1536                 sock_release(*csocket);
1537                 *csocket = NULL;
1538                 return rc;
1539         }
1540         /* Eventually check for other socket options to change from
1541                 the default. sock_setsockopt not used because it expects
1542                 user space buffer */
1543          cFYI(1, ("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
1544                  (*csocket)->sk->sk_sndbuf,
1545                  (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
1546         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1547         /* make the bufsizes depend on wsize/rsize and max requests */
1548         if ((*csocket)->sk->sk_sndbuf < (200 * 1024))
1549                 (*csocket)->sk->sk_sndbuf = 200 * 1024;
1550         if ((*csocket)->sk->sk_rcvbuf < (140 * 1024))
1551                 (*csocket)->sk->sk_rcvbuf = 140 * 1024;
1552
1553         /* send RFC1001 sessinit */
1554         if (psin_server->sin_port == htons(RFC1001_PORT)) {
1555                 /* some servers require RFC1001 sessinit before sending
1556                 negprot - BB check reconnection in case where second
1557                 sessinit is sent but no second negprot */
1558                 struct rfc1002_session_packet *ses_init_buf;
1559                 struct smb_hdr *smb_buf;
1560                 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
1561                                        GFP_KERNEL);
1562                 if (ses_init_buf) {
1563                         ses_init_buf->trailer.session_req.called_len = 32;
1564                         if (target_name && (target_name[0] != 0)) {
1565                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1566                                         target_name, 16);
1567                         } else {
1568                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1569                                         DEFAULT_CIFS_CALLED_NAME, 16);
1570                         }
1571
1572                         ses_init_buf->trailer.session_req.calling_len = 32;
1573                         /* calling name ends in null (byte 16) from old smb
1574                         convention. */
1575                         if (netbios_name && (netbios_name[0] != 0)) {
1576                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1577                                         netbios_name, 16);
1578                         } else {
1579                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1580                                         "LINUX_CIFS_CLNT", 16);
1581                         }
1582                         ses_init_buf->trailer.session_req.scope1 = 0;
1583                         ses_init_buf->trailer.session_req.scope2 = 0;
1584                         smb_buf = (struct smb_hdr *)ses_init_buf;
1585                         /* sizeof RFC1002_SESSION_REQUEST with no scope */
1586                         smb_buf->smb_buf_length = 0x81000044;
1587                         rc = smb_send(*csocket, smb_buf, 0x44,
1588                                 (struct sockaddr *)psin_server);
1589                         kfree(ses_init_buf);
1590                         msleep(1); /* RFC1001 layer in at least one server
1591                                       requires very short break before negprot
1592                                       presumably because not expecting negprot
1593                                       to follow so fast.  This is a simple
1594                                       solution that works without
1595                                       complicating the code and causes no
1596                                       significant slowing down on mount
1597                                       for everyone else */
1598                 }
1599                 /* else the negprot may still work without this
1600                 even though malloc failed */
1601
1602         }
1603
1604         return rc;
1605 }
1606
1607 static int
1608 ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
1609 {
1610         int rc = 0;
1611         int connected = 0;
1612         __be16 orig_port = 0;
1613
1614         if (*csocket == NULL) {
1615                 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
1616                                       IPPROTO_TCP, csocket);
1617                 if (rc < 0) {
1618                         cERROR(1, ("Error %d creating ipv6 socket", rc));
1619                         *csocket = NULL;
1620                         return rc;
1621                 } else {
1622                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1623                          cFYI(1, ("ipv6 Socket created"));
1624                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1625                 }
1626         }
1627
1628         psin_server->sin6_family = AF_INET6;
1629
1630         if (psin_server->sin6_port) { /* user overrode default port */
1631                 rc = (*csocket)->ops->connect(*csocket,
1632                                 (struct sockaddr *) psin_server,
1633                                 sizeof(struct sockaddr_in6), 0);
1634                 if (rc >= 0)
1635                         connected = 1;
1636         }
1637
1638         if (!connected) {
1639                 /* save original port so we can retry user specified port
1640                         later if fall back ports fail this time  */
1641
1642                 orig_port = psin_server->sin6_port;
1643                 /* do not retry on the same port we just failed on */
1644                 if (psin_server->sin6_port != htons(CIFS_PORT)) {
1645                         psin_server->sin6_port = htons(CIFS_PORT);
1646
1647                         rc = (*csocket)->ops->connect(*csocket,
1648                                         (struct sockaddr *) psin_server,
1649                                         sizeof(struct sockaddr_in6), 0);
1650                         if (rc >= 0)
1651                                 connected = 1;
1652                 }
1653         }
1654         if (!connected) {
1655                 psin_server->sin6_port = htons(RFC1001_PORT);
1656                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1657                                  psin_server, sizeof(struct sockaddr_in6), 0);
1658                 if (rc >= 0)
1659                         connected = 1;
1660         }
1661
1662         /* give up here - unless we want to retry on different
1663                 protocol families some day */
1664         if (!connected) {
1665                 if (orig_port)
1666                         psin_server->sin6_port = orig_port;
1667                 cFYI(1, ("Error %d connecting to server via ipv6", rc));
1668                 sock_release(*csocket);
1669                 *csocket = NULL;
1670                 return rc;
1671         }
1672         /* Eventually check for other socket options to change from
1673                 the default. sock_setsockopt not used because it expects
1674                 user space buffer */
1675         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1676
1677         return rc;
1678 }
1679
1680 void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
1681                           struct super_block *sb, struct smb_vol *vol_info)
1682 {
1683         /* if we are reconnecting then should we check to see if
1684          * any requested capabilities changed locally e.g. via
1685          * remount but we can not do much about it here
1686          * if they have (even if we could detect it by the following)
1687          * Perhaps we could add a backpointer to array of sb from tcon
1688          * or if we change to make all sb to same share the same
1689          * sb as NFS - then we only have one backpointer to sb.
1690          * What if we wanted to mount the server share twice once with
1691          * and once without posixacls or posix paths? */
1692         __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1693
1694         if (vol_info && vol_info->no_linux_ext) {
1695                 tcon->fsUnixInfo.Capability = 0;
1696                 tcon->unix_ext = 0; /* Unix Extensions disabled */
1697                 cFYI(1, ("Linux protocol extensions disabled"));
1698                 return;
1699         } else if (vol_info)
1700                 tcon->unix_ext = 1; /* Unix Extensions supported */
1701
1702         if (tcon->unix_ext == 0) {
1703                 cFYI(1, ("Unix extensions disabled so not set on reconnect"));
1704                 return;
1705         }
1706
1707         if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
1708                 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1709
1710                 /* check for reconnect case in which we do not
1711                    want to change the mount behavior if we can avoid it */
1712                 if (vol_info == NULL) {
1713                         /* turn off POSIX ACL and PATHNAMES if not set
1714                            originally at mount time */
1715                         if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
1716                                 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1717                         if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
1718                                 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
1719                                         cERROR(1, ("POSIXPATH support change"));
1720                                 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1721                         } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
1722                                 cERROR(1, ("possible reconnect error"));
1723                                 cERROR(1,
1724                                         ("server disabled POSIX path support"));
1725                         }
1726                 }
1727
1728                 cap &= CIFS_UNIX_CAP_MASK;
1729                 if (vol_info && vol_info->no_psx_acl)
1730                         cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1731                 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
1732                         cFYI(1, ("negotiated posix acl support"));
1733                         if (sb)
1734                                 sb->s_flags |= MS_POSIXACL;
1735                 }
1736
1737                 if (vol_info && vol_info->posix_paths == 0)
1738                         cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1739                 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
1740                         cFYI(1, ("negotiate posix pathnames"));
1741                         if (sb)
1742                                 CIFS_SB(sb)->mnt_cifs_flags |=
1743                                         CIFS_MOUNT_POSIX_PATHS;
1744                 }
1745
1746                 /* We might be setting the path sep back to a different
1747                 form if we are reconnecting and the server switched its
1748                 posix path capability for this share */
1749                 if (sb && (CIFS_SB(sb)->prepathlen > 0))
1750                         CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
1751
1752                 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
1753                         if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
1754                                 CIFS_SB(sb)->rsize = 127 * 1024;
1755                                 cFYI(DBG2,
1756                                         ("larger reads not supported by srv"));
1757                         }
1758                 }
1759
1760
1761                 cFYI(1, ("Negotiate caps 0x%x", (int)cap));
1762 #ifdef CONFIG_CIFS_DEBUG2
1763                 if (cap & CIFS_UNIX_FCNTL_CAP)
1764                         cFYI(1, ("FCNTL cap"));
1765                 if (cap & CIFS_UNIX_EXTATTR_CAP)
1766                         cFYI(1, ("EXTATTR cap"));
1767                 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
1768                         cFYI(1, ("POSIX path cap"));
1769                 if (cap & CIFS_UNIX_XATTR_CAP)
1770                         cFYI(1, ("XATTR cap"));
1771                 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
1772                         cFYI(1, ("POSIX ACL cap"));
1773                 if (cap & CIFS_UNIX_LARGE_READ_CAP)
1774                         cFYI(1, ("very large read cap"));
1775                 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
1776                         cFYI(1, ("very large write cap"));
1777 #endif /* CIFS_DEBUG2 */
1778                 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
1779                         if (vol_info == NULL) {
1780                                 cFYI(1, ("resetting capabilities failed"));
1781                         } else
1782                                 cERROR(1, ("Negotiating Unix capabilities "
1783                                            "with the server failed.  Consider "
1784                                            "mounting with the Unix Extensions\n"
1785                                            "disabled, if problems are found, "
1786                                            "by specifying the nounix mount "
1787                                            "option."));
1788
1789                 }
1790         }
1791 }
1792
1793 static void
1794 convert_delimiter(char *path, char delim)
1795 {
1796         int i;
1797         char old_delim;
1798
1799         if (path == NULL)
1800                 return;
1801
1802         if (delim == '/')
1803                 old_delim = '\\';
1804         else
1805                 old_delim = '/';
1806
1807         for (i = 0; path[i] != '\0'; i++) {
1808                 if (path[i] == old_delim)
1809                         path[i] = delim;
1810         }
1811 }
1812
1813 int
1814 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
1815            char *mount_data, const char *devname)
1816 {
1817         int rc = 0;
1818         int xid;
1819         int address_type = AF_INET;
1820         struct socket *csocket = NULL;
1821         struct sockaddr_in sin_server;
1822         struct sockaddr_in6 sin_server6;
1823         struct smb_vol volume_info;
1824         struct cifsSesInfo *pSesInfo = NULL;
1825         struct cifsSesInfo *existingCifsSes = NULL;
1826         struct cifsTconInfo *tcon = NULL;
1827         struct TCP_Server_Info *srvTcp = NULL;
1828
1829         xid = GetXid();
1830
1831 /* cFYI(1, ("Entering cifs_mount. Xid: %d with: %s", xid, mount_data)); */
1832
1833         memset(&volume_info, 0, sizeof(struct smb_vol));
1834         if (cifs_parse_mount_options(mount_data, devname, &volume_info)) {
1835                 rc = -EINVAL;
1836                 goto out;
1837         }
1838
1839         if (volume_info.nullauth) {
1840                 cFYI(1, ("null user"));
1841                 volume_info.username = "";
1842         } else if (volume_info.username) {
1843                 /* BB fixme parse for domain name here */
1844                 cFYI(1, ("Username: %s", volume_info.username));
1845         } else {
1846                 cifserror("No username specified");
1847         /* In userspace mount helper we can get user name from alternate
1848            locations such as env variables and files on disk */
1849                 rc = -EINVAL;
1850                 goto out;
1851         }
1852
1853         if (volume_info.UNCip && volume_info.UNC) {
1854                 rc = cifs_inet_pton(AF_INET, volume_info.UNCip,
1855                                     &sin_server.sin_addr.s_addr);
1856
1857                 if (rc <= 0) {
1858                         /* not ipv4 address, try ipv6 */
1859                         rc = cifs_inet_pton(AF_INET6, volume_info.UNCip,
1860                                             &sin_server6.sin6_addr.in6_u);
1861                         if (rc > 0)
1862                                 address_type = AF_INET6;
1863                 } else {
1864                         address_type = AF_INET;
1865                 }
1866
1867                 if (rc <= 0) {
1868                         /* we failed translating address */
1869                         rc = -EINVAL;
1870                         goto out;
1871                 }
1872
1873                 cFYI(1, ("UNC: %s ip: %s", volume_info.UNC, volume_info.UNCip));
1874                 /* success */
1875                 rc = 0;
1876         } else if (volume_info.UNCip) {
1877                 /* BB using ip addr as server name to connect to the
1878                    DFS root below */
1879                 cERROR(1, ("Connecting to DFS root not implemented yet"));
1880                 rc = -EINVAL;
1881                 goto out;
1882         } else /* which servers DFS root would we conect to */ {
1883                 cERROR(1,
1884                        ("CIFS mount error: No UNC path (e.g. -o "
1885                         "unc=//192.168.1.100/public) specified"));
1886                 rc = -EINVAL;
1887                 goto out;
1888         }
1889
1890         /* this is needed for ASCII cp to Unicode converts */
1891         if (volume_info.iocharset == NULL) {
1892                 cifs_sb->local_nls = load_nls_default();
1893         /* load_nls_default can not return null */
1894         } else {
1895                 cifs_sb->local_nls = load_nls(volume_info.iocharset);
1896                 if (cifs_sb->local_nls == NULL) {
1897                         cERROR(1, ("CIFS mount error: iocharset %s not found",
1898                                  volume_info.iocharset));
1899                         rc = -ELIBACC;
1900                         goto out;
1901                 }
1902         }
1903
1904         if (address_type == AF_INET)
1905                 existingCifsSes = cifs_find_tcp_session(&sin_server.sin_addr,
1906                         NULL /* no ipv6 addr */,
1907                         volume_info.username, &srvTcp);
1908         else if (address_type == AF_INET6) {
1909                 cFYI(1, ("looking for ipv6 address"));
1910                 existingCifsSes = cifs_find_tcp_session(NULL /* no ipv4 addr */,
1911                         &sin_server6.sin6_addr,
1912                         volume_info.username, &srvTcp);
1913         } else {
1914                 rc = -EINVAL;
1915                 goto out;
1916         }
1917
1918         if (srvTcp) {
1919                 cFYI(1, ("Existing tcp session with server found"));
1920         } else {        /* create socket */
1921                 if (volume_info.port)
1922                         sin_server.sin_port = htons(volume_info.port);
1923                 else
1924                         sin_server.sin_port = 0;
1925                 if (address_type == AF_INET6) {
1926                         cFYI(1, ("attempting ipv6 connect"));
1927                         /* BB should we allow ipv6 on port 139? */
1928                         /* other OS never observed in Wild doing 139 with v6 */
1929                         rc = ipv6_connect(&sin_server6, &csocket);
1930                 } else
1931                         rc = ipv4_connect(&sin_server, &csocket,
1932                                   volume_info.source_rfc1001_name,
1933                                   volume_info.target_rfc1001_name);
1934                 if (rc < 0) {
1935                         cERROR(1, ("Error connecting to IPv4 socket. "
1936                                    "Aborting operation"));
1937                         if (csocket != NULL)
1938                                 sock_release(csocket);
1939                         goto out;
1940                 }
1941
1942                 srvTcp = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1943                 if (!srvTcp) {
1944                         rc = -ENOMEM;
1945                         sock_release(csocket);
1946                         goto out;
1947                 } else {
1948                         memcpy(&srvTcp->addr.sockAddr, &sin_server,
1949                                 sizeof(struct sockaddr_in));
1950                         atomic_set(&srvTcp->inFlight, 0);
1951                         /* BB Add code for ipv6 case too */
1952                         srvTcp->ssocket = csocket;
1953                         srvTcp->protocolType = IPV4;
1954                         srvTcp->hostname = extract_hostname(volume_info.UNC);
1955                         if (IS_ERR(srvTcp->hostname)) {
1956                                 rc = PTR_ERR(srvTcp->hostname);
1957                                 sock_release(csocket);
1958                                 goto out;
1959                         }
1960                         init_waitqueue_head(&srvTcp->response_q);
1961                         init_waitqueue_head(&srvTcp->request_q);
1962                         INIT_LIST_HEAD(&srvTcp->pending_mid_q);
1963                         /* at this point we are the only ones with the pointer
1964                         to the struct since the kernel thread not created yet
1965                         so no need to spinlock this init of tcpStatus */
1966                         srvTcp->tcpStatus = CifsNew;
1967                         init_MUTEX(&srvTcp->tcpSem);
1968                         srvTcp->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, srvTcp, "cifsd");
1969                         if (IS_ERR(srvTcp->tsk)) {
1970                                 rc = PTR_ERR(srvTcp->tsk);
1971                                 cERROR(1, ("error %d create cifsd thread", rc));
1972                                 srvTcp->tsk = NULL;
1973                                 sock_release(csocket);
1974                                 kfree(srvTcp->hostname);
1975                                 goto out;
1976                         }
1977                         rc = 0;
1978                         memcpy(srvTcp->workstation_RFC1001_name,
1979                                 volume_info.source_rfc1001_name, 16);
1980                         memcpy(srvTcp->server_RFC1001_name,
1981                                 volume_info.target_rfc1001_name, 16);
1982                         srvTcp->sequence_number = 0;
1983                 }
1984         }
1985
1986         if (existingCifsSes) {
1987                 pSesInfo = existingCifsSes;
1988                 cFYI(1, ("Existing smb sess found (status=%d)",
1989                         pSesInfo->status));
1990                 down(&pSesInfo->sesSem);
1991                 if (pSesInfo->status == CifsNeedReconnect) {
1992                         cFYI(1, ("Session needs reconnect"));
1993                         rc = cifs_setup_session(xid, pSesInfo,
1994                                                 cifs_sb->local_nls);
1995                 }
1996                 up(&pSesInfo->sesSem);
1997         } else if (!rc) {
1998                 cFYI(1, ("Existing smb sess not found"));
1999                 pSesInfo = sesInfoAlloc();
2000                 if (pSesInfo == NULL)
2001                         rc = -ENOMEM;
2002                 else {
2003                         pSesInfo->server = srvTcp;
2004                         sprintf(pSesInfo->serverName, "%u.%u.%u.%u",
2005                                 NIPQUAD(sin_server.sin_addr.s_addr));
2006                 }
2007
2008                 if (!rc) {
2009                         /* volume_info.password freed at unmount */
2010                         if (volume_info.password) {
2011                                 pSesInfo->password = volume_info.password;
2012                                 /* set to NULL to prevent freeing on exit */
2013                                 volume_info.password = NULL;
2014                         }
2015                         if (volume_info.username)
2016                                 strncpy(pSesInfo->userName,
2017                                         volume_info.username,
2018                                         MAX_USERNAME_SIZE);
2019                         if (volume_info.domainname) {
2020                                 int len = strlen(volume_info.domainname);
2021                                 pSesInfo->domainName =
2022                                         kmalloc(len + 1, GFP_KERNEL);
2023                                 if (pSesInfo->domainName)
2024                                         strcpy(pSesInfo->domainName,
2025                                                 volume_info.domainname);
2026                         }
2027                         pSesInfo->linux_uid = volume_info.linux_uid;
2028                         pSesInfo->overrideSecFlg = volume_info.secFlg;
2029                         down(&pSesInfo->sesSem);
2030                         /* BB FIXME need to pass vol->secFlgs BB */
2031                         rc = cifs_setup_session(xid, pSesInfo,
2032                                                 cifs_sb->local_nls);
2033                         up(&pSesInfo->sesSem);
2034                         if (!rc)
2035                                 atomic_inc(&srvTcp->socketUseCount);
2036                 }
2037         }
2038
2039         /* search for existing tcon to this server share */
2040         if (!rc) {
2041                 if (volume_info.rsize > CIFSMaxBufSize) {
2042                         cERROR(1, ("rsize %d too large, using MaxBufSize",
2043                                 volume_info.rsize));
2044                         cifs_sb->rsize = CIFSMaxBufSize;
2045                 } else if ((volume_info.rsize) &&
2046                                 (volume_info.rsize <= CIFSMaxBufSize))
2047                         cifs_sb->rsize = volume_info.rsize;
2048                 else /* default */
2049                         cifs_sb->rsize = CIFSMaxBufSize;
2050
2051                 if (volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
2052                         cERROR(1, ("wsize %d too large, using 4096 instead",
2053                                   volume_info.wsize));
2054                         cifs_sb->wsize = 4096;
2055                 } else if (volume_info.wsize)
2056                         cifs_sb->wsize = volume_info.wsize;
2057                 else
2058                         cifs_sb->wsize =
2059                                 min_t(const int, PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2060                                         127*1024);
2061                         /* old default of CIFSMaxBufSize was too small now
2062                            that SMB Write2 can send multiple pages in kvec.
2063                            RFC1001 does not describe what happens when frame
2064                            bigger than 128K is sent so use that as max in
2065                            conjunction with 52K kvec constraint on arch with 4K
2066                            page size  */
2067
2068                 if (cifs_sb->rsize < 2048) {
2069                         cifs_sb->rsize = 2048;
2070                         /* Windows ME may prefer this */
2071                         cFYI(1, ("readsize set to minimum: 2048"));
2072                 }
2073                 /* calculate prepath */
2074                 cifs_sb->prepath = volume_info.prepath;
2075                 if (cifs_sb->prepath) {
2076                         cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2077                         /* we can not convert the / to \ in the path
2078                         separators in the prefixpath yet because we do not
2079                         know (until reset_cifs_unix_caps is called later)
2080                         whether POSIX PATH CAP is available. We normalize
2081                         the / to \ after reset_cifs_unix_caps is called */
2082                         volume_info.prepath = NULL;
2083                 } else
2084                         cifs_sb->prepathlen = 0;
2085                 cifs_sb->mnt_uid = volume_info.linux_uid;
2086                 cifs_sb->mnt_gid = volume_info.linux_gid;
2087                 cifs_sb->mnt_file_mode = volume_info.file_mode;
2088                 cifs_sb->mnt_dir_mode = volume_info.dir_mode;
2089                 cFYI(1, ("file mode: 0x%x  dir mode: 0x%x",
2090                         cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode));
2091
2092                 if (volume_info.noperm)
2093                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2094                 if (volume_info.setuids)
2095                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2096                 if (volume_info.server_ino)
2097                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2098                 if (volume_info.remap)
2099                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2100                 if (volume_info.no_xattr)
2101                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2102                 if (volume_info.sfu_emul)
2103                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2104                 if (volume_info.nobrl)
2105                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2106                 if (volume_info.cifs_acl)
2107                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2108                 if (volume_info.override_uid)
2109                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2110                 if (volume_info.override_gid)
2111                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2112                 if (volume_info.dynperm)
2113                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
2114                 if (volume_info.direct_io) {
2115                         cFYI(1, ("mounting share using direct i/o"));
2116                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2117                 }
2118
2119                 tcon =
2120                     find_unc(sin_server.sin_addr.s_addr, volume_info.UNC,
2121                              volume_info.username);
2122                 if (tcon) {
2123                         cFYI(1, ("Found match on UNC path"));
2124                         /* we can have only one retry value for a connection
2125                            to a share so for resources mounted more than once
2126                            to the same server share the last value passed in
2127                            for the retry flag is used */
2128                         tcon->retry = volume_info.retry;
2129                         tcon->nocase = volume_info.nocase;
2130                 } else {
2131                         tcon = tconInfoAlloc();
2132                         if (tcon == NULL)
2133                                 rc = -ENOMEM;
2134                         else {
2135                                 /* check for null share name ie connecting to
2136                                  * dfs root */
2137
2138                                 /* BB check if this works for exactly length
2139                                  * three strings */
2140                                 if ((strchr(volume_info.UNC + 3, '\\') == NULL)
2141                                     && (strchr(volume_info.UNC + 3, '/') ==
2142                                         NULL)) {
2143 /*                                      rc = connect_to_dfs_path(xid, pSesInfo,
2144                                                 "", cifs_sb->local_nls,
2145                                                 cifs_sb->mnt_cifs_flags &
2146                                                   CIFS_MOUNT_MAP_SPECIAL_CHR);*/
2147                                         cFYI(1, ("DFS root not supported"));
2148                                         rc = -ENODEV;
2149                                         goto out;
2150                                 } else {
2151                                         /* BB Do we need to wrap sesSem around
2152                                          * this TCon call and Unix SetFS as
2153                                          * we do on SessSetup and reconnect? */
2154                                         rc = CIFSTCon(xid, pSesInfo,
2155                                                 volume_info.UNC,
2156                                                 tcon, cifs_sb->local_nls);
2157                                         cFYI(1, ("CIFS Tcon rc = %d", rc));
2158                                 }
2159                                 if (!rc) {
2160                                         atomic_inc(&pSesInfo->inUse);
2161                                         tcon->retry = volume_info.retry;
2162                                         tcon->nocase = volume_info.nocase;
2163                                 }
2164                         }
2165                 }
2166         }
2167         if (pSesInfo) {
2168                 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
2169                         sb->s_maxbytes = (u64) 1 << 63;
2170                 } else
2171                         sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
2172         }
2173
2174         /* BB FIXME fix time_gran to be larger for LANMAN sessions */
2175         sb->s_time_gran = 100;
2176
2177 /* on error free sesinfo and tcon struct if needed */
2178         if (rc) {
2179                 /* if session setup failed, use count is zero but
2180                 we still need to free cifsd thread */
2181                 if (atomic_read(&srvTcp->socketUseCount) == 0) {
2182                         spin_lock(&GlobalMid_Lock);
2183                         srvTcp->tcpStatus = CifsExiting;
2184                         spin_unlock(&GlobalMid_Lock);
2185                         if (srvTcp->tsk) {
2186                                 /* If we could verify that kthread_stop would
2187                                    always wake up processes blocked in
2188                                    tcp in recv_mesg then we could remove the
2189                                    send_sig call */
2190                                 force_sig(SIGKILL, srvTcp->tsk);
2191                                 kthread_stop(srvTcp->tsk);
2192                         }
2193                 }
2194                  /* If find_unc succeeded then rc == 0 so we can not end */
2195                 if (tcon)  /* up accidently freeing someone elses tcon struct */
2196                         tconInfoFree(tcon);
2197                 if (existingCifsSes == NULL) {
2198                         if (pSesInfo) {
2199                                 if ((pSesInfo->server) &&
2200                                     (pSesInfo->status == CifsGood)) {
2201                                         int temp_rc;
2202                                         temp_rc = CIFSSMBLogoff(xid, pSesInfo);
2203                                         /* if the socketUseCount is now zero */
2204                                         if ((temp_rc == -ESHUTDOWN) &&
2205                                             (pSesInfo->server) &&
2206                                             (pSesInfo->server->tsk)) {
2207                                                 force_sig(SIGKILL,
2208                                                         pSesInfo->server->tsk);
2209                                                 kthread_stop(pSesInfo->server->tsk);
2210                                         }
2211                                 } else {
2212                                         cFYI(1, ("No session or bad tcon"));
2213                                         if ((pSesInfo->server) &&
2214                                             (pSesInfo->server->tsk)) {
2215                                                 force_sig(SIGKILL,
2216                                                         pSesInfo->server->tsk);
2217                                                 kthread_stop(pSesInfo->server->tsk);
2218                                         }
2219                                 }
2220                                 sesInfoFree(pSesInfo);
2221                                 /* pSesInfo = NULL; */
2222                         }
2223                 }
2224         } else {
2225                 atomic_inc(&tcon->useCount);
2226                 cifs_sb->tcon = tcon;
2227                 tcon->ses = pSesInfo;
2228
2229                 /* do not care if following two calls succeed - informational */
2230                 if (!tcon->ipc) {
2231                         CIFSSMBQFSDeviceInfo(xid, tcon);
2232                         CIFSSMBQFSAttributeInfo(xid, tcon);
2233                 }
2234
2235                 /* tell server which Unix caps we support */
2236                 if (tcon->ses->capabilities & CAP_UNIX)
2237                         /* reset of caps checks mount to see if unix extensions
2238                            disabled for just this mount */
2239                         reset_cifs_unix_caps(xid, tcon, sb, &volume_info);
2240                 else
2241                         tcon->unix_ext = 0; /* server does not support them */
2242
2243                 /* convert forward to back slashes in prepath here if needed */
2244                 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2245                         convert_delimiter(cifs_sb->prepath,
2246                                           CIFS_DIR_SEP(cifs_sb));
2247
2248                 if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2249                         cifs_sb->rsize = 1024 * 127;
2250                         cFYI(DBG2,
2251                                 ("no very large read support, rsize now 127K"));
2252                 }
2253                 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2254                         cifs_sb->wsize = min(cifs_sb->wsize,
2255                                              (tcon->ses->server->maxBuf -
2256                                               MAX_CIFS_HDR_SIZE));
2257                 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2258                         cifs_sb->rsize = min(cifs_sb->rsize,
2259                                              (tcon->ses->server->maxBuf -
2260                                               MAX_CIFS_HDR_SIZE));
2261         }
2262
2263         /* volume_info.password is freed above when existing session found
2264         (in which case it is not needed anymore) but when new sesion is created
2265         the password ptr is put in the new session structure (in which case the
2266         password will be freed at unmount time) */
2267 out:
2268         /* zero out password before freeing */
2269         if (volume_info.password != NULL) {
2270                 memset(volume_info.password, 0, strlen(volume_info.password));
2271                 kfree(volume_info.password);
2272         }
2273         kfree(volume_info.UNC);
2274         kfree(volume_info.prepath);
2275         FreeXid(xid);
2276         return rc;
2277 }
2278
2279 static int
2280 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2281               char session_key[CIFS_SESS_KEY_SIZE],
2282               const struct nls_table *nls_codepage)
2283 {
2284         struct smb_hdr *smb_buffer;
2285         struct smb_hdr *smb_buffer_response;
2286         SESSION_SETUP_ANDX *pSMB;
2287         SESSION_SETUP_ANDX *pSMBr;
2288         char *bcc_ptr;
2289         char *user;
2290         char *domain;
2291         int rc = 0;
2292         int remaining_words = 0;
2293         int bytes_returned = 0;
2294         int len;
2295         __u32 capabilities;
2296         __u16 count;
2297
2298         cFYI(1, ("In sesssetup"));
2299         if (ses == NULL)
2300                 return -EINVAL;
2301         user = ses->userName;
2302         domain = ses->domainName;
2303         smb_buffer = cifs_buf_get();
2304
2305         if (smb_buffer == NULL)
2306                 return -ENOMEM;
2307
2308         smb_buffer_response = smb_buffer;
2309         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2310
2311         /* send SMBsessionSetup here */
2312         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2313                         NULL /* no tCon exists yet */ , 13 /* wct */ );
2314
2315         smb_buffer->Mid = GetNextMid(ses->server);
2316         pSMB->req_no_secext.AndXCommand = 0xFF;
2317         pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2318         pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2319
2320         if (ses->server->secMode &
2321                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2322                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2323
2324         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2325                 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2326         if (ses->capabilities & CAP_UNICODE) {
2327                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2328                 capabilities |= CAP_UNICODE;
2329         }
2330         if (ses->capabilities & CAP_STATUS32) {
2331                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2332                 capabilities |= CAP_STATUS32;
2333         }
2334         if (ses->capabilities & CAP_DFS) {
2335                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2336                 capabilities |= CAP_DFS;
2337         }
2338         pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2339
2340         pSMB->req_no_secext.CaseInsensitivePasswordLength =
2341                 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2342
2343         pSMB->req_no_secext.CaseSensitivePasswordLength =
2344             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2345         bcc_ptr = pByteArea(smb_buffer);
2346         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2347         bcc_ptr += CIFS_SESS_KEY_SIZE;
2348         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2349         bcc_ptr += CIFS_SESS_KEY_SIZE;
2350
2351         if (ses->capabilities & CAP_UNICODE) {
2352                 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2353                         *bcc_ptr = 0;
2354                         bcc_ptr++;
2355                 }
2356                 if (user == NULL)
2357                         bytes_returned = 0; /* skip null user */
2358                 else
2359                         bytes_returned =
2360                                 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2361                                         nls_codepage);
2362                 /* convert number of 16 bit words to bytes */
2363                 bcc_ptr += 2 * bytes_returned;
2364                 bcc_ptr += 2;   /* trailing null */
2365                 if (domain == NULL)
2366                         bytes_returned =
2367                             cifs_strtoUCS((__le16 *) bcc_ptr,
2368                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2369                 else
2370                         bytes_returned =
2371                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2372                                           nls_codepage);
2373                 bcc_ptr += 2 * bytes_returned;
2374                 bcc_ptr += 2;
2375                 bytes_returned =
2376                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2377                                   32, nls_codepage);
2378                 bcc_ptr += 2 * bytes_returned;
2379                 bytes_returned =
2380                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release,
2381                                   32, nls_codepage);
2382                 bcc_ptr += 2 * bytes_returned;
2383                 bcc_ptr += 2;
2384                 bytes_returned =
2385                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2386                                   64, nls_codepage);
2387                 bcc_ptr += 2 * bytes_returned;
2388                 bcc_ptr += 2;
2389         } else {
2390                 if (user != NULL) {
2391                     strncpy(bcc_ptr, user, 200);
2392                     bcc_ptr += strnlen(user, 200);
2393                 }
2394                 *bcc_ptr = 0;
2395                 bcc_ptr++;
2396                 if (domain == NULL) {
2397                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2398                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2399                 } else {
2400                         strncpy(bcc_ptr, domain, 64);
2401                         bcc_ptr += strnlen(domain, 64);
2402                         *bcc_ptr = 0;
2403                         bcc_ptr++;
2404                 }
2405                 strcpy(bcc_ptr, "Linux version ");
2406                 bcc_ptr += strlen("Linux version ");
2407                 strcpy(bcc_ptr, utsname()->release);
2408                 bcc_ptr += strlen(utsname()->release) + 1;
2409                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2410                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2411         }
2412         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2413         smb_buffer->smb_buf_length += count;
2414         pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2415
2416         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2417                          &bytes_returned, CIFS_LONG_OP);
2418         if (rc) {
2419 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2420         } else if ((smb_buffer_response->WordCount == 3)
2421                    || (smb_buffer_response->WordCount == 4)) {
2422                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2423                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2424                 if (action & GUEST_LOGIN)
2425                         cFYI(1, (" Guest login")); /* BB mark SesInfo struct? */
2426                 ses->Suid = smb_buffer_response->Uid; /* UID left in wire format
2427                                                          (little endian) */
2428                 cFYI(1, ("UID = %d ", ses->Suid));
2429         /* response can have either 3 or 4 word count - Samba sends 3 */
2430                 bcc_ptr = pByteArea(smb_buffer_response);
2431                 if ((pSMBr->resp.hdr.WordCount == 3)
2432                     || ((pSMBr->resp.hdr.WordCount == 4)
2433                         && (blob_len < pSMBr->resp.ByteCount))) {
2434                         if (pSMBr->resp.hdr.WordCount == 4)
2435                                 bcc_ptr += blob_len;
2436
2437                         if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2438                                 if ((long) (bcc_ptr) % 2) {
2439                                         remaining_words =
2440                                             (BCC(smb_buffer_response) - 1) / 2;
2441                                         /* Unicode strings must be word
2442                                            aligned */
2443                                         bcc_ptr++;
2444                                 } else {
2445                                         remaining_words =
2446                                                 BCC(smb_buffer_response) / 2;
2447                                 }
2448                                 len =
2449                                     UniStrnlen((wchar_t *) bcc_ptr,
2450                                                remaining_words - 1);
2451 /* We look for obvious messed up bcc or strings in response so we do not go off
2452    the end since (at least) WIN2K and Windows XP have a major bug in not null
2453    terminating last Unicode string in response  */
2454                                 if (ses->serverOS)
2455                                         kfree(ses->serverOS);
2456                                 ses->serverOS = kzalloc(2 * (len + 1),
2457                                                         GFP_KERNEL);
2458                                 if (ses->serverOS == NULL)
2459                                         goto sesssetup_nomem;
2460                                 cifs_strfromUCS_le(ses->serverOS,
2461                                                    (__le16 *)bcc_ptr,
2462                                                    len, nls_codepage);
2463                                 bcc_ptr += 2 * (len + 1);
2464                                 remaining_words -= len + 1;
2465                                 ses->serverOS[2 * len] = 0;
2466                                 ses->serverOS[1 + (2 * len)] = 0;
2467                                 if (remaining_words > 0) {
2468                                         len = UniStrnlen((wchar_t *)bcc_ptr,
2469                                                          remaining_words-1);
2470                                         kfree(ses->serverNOS);
2471                                         ses->serverNOS = kzalloc(2 * (len + 1),
2472                                                                  GFP_KERNEL);
2473                                         if (ses->serverNOS == NULL)
2474                                                 goto sesssetup_nomem;
2475                                         cifs_strfromUCS_le(ses->serverNOS,
2476                                                            (__le16 *)bcc_ptr,
2477                                                            len, nls_codepage);
2478                                         bcc_ptr += 2 * (len + 1);
2479                                         ses->serverNOS[2 * len] = 0;
2480                                         ses->serverNOS[1 + (2 * len)] = 0;
2481                                         if (strncmp(ses->serverNOS,
2482                                                 "NT LAN Manager 4", 16) == 0) {
2483                                                 cFYI(1, ("NT4 server"));
2484                                                 ses->flags |= CIFS_SES_NT4;
2485                                         }
2486                                         remaining_words -= len + 1;
2487                                         if (remaining_words > 0) {
2488                                                 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2489                                 /* last string is not always null terminated
2490                                    (for e.g. for Windows XP & 2000) */
2491                                                 if (ses->serverDomain)
2492                                                         kfree(ses->serverDomain);
2493                                                 ses->serverDomain =
2494                                                     kzalloc(2*(len+1),
2495                                                             GFP_KERNEL);
2496                                                 if (ses->serverDomain == NULL)
2497                                                         goto sesssetup_nomem;
2498                                                 cifs_strfromUCS_le(ses->serverDomain,
2499                                                         (__le16 *)bcc_ptr,
2500                                                         len, nls_codepage);
2501                                                 bcc_ptr += 2 * (len + 1);
2502                                                 ses->serverDomain[2*len] = 0;
2503                                                 ses->serverDomain[1+(2*len)] = 0;
2504                                         } else { /* else no more room so create
2505                                                   dummy domain string */
2506                                                 if (ses->serverDomain)
2507                                                         kfree(ses->serverDomain);
2508                                                 ses->serverDomain =
2509                                                         kzalloc(2, GFP_KERNEL);
2510                                         }
2511                                 } else { /* no room so create dummy domain
2512                                             and NOS string */
2513
2514                                         /* if these kcallocs fail not much we
2515                                            can do, but better to not fail the
2516                                            sesssetup itself */
2517                                         kfree(ses->serverDomain);
2518                                         ses->serverDomain =
2519                                             kzalloc(2, GFP_KERNEL);
2520                                         kfree(ses->serverNOS);
2521                                         ses->serverNOS =
2522                                             kzalloc(2, GFP_KERNEL);
2523                                 }
2524                         } else {        /* ASCII */
2525                                 len = strnlen(bcc_ptr, 1024);
2526                                 if (((long) bcc_ptr + len) - (long)
2527                                     pByteArea(smb_buffer_response)
2528                                             <= BCC(smb_buffer_response)) {
2529                                         kfree(ses->serverOS);
2530                                         ses->serverOS = kzalloc(len + 1,
2531                                                                 GFP_KERNEL);
2532                                         if (ses->serverOS == NULL)
2533                                                 goto sesssetup_nomem;
2534                                         strncpy(ses->serverOS, bcc_ptr, len);
2535
2536                                         bcc_ptr += len;
2537                                         /* null terminate the string */
2538                                         bcc_ptr[0] = 0;
2539                                         bcc_ptr++;
2540
2541                                         len = strnlen(bcc_ptr, 1024);
2542                                         kfree(ses->serverNOS);
2543                                         ses->serverNOS = kzalloc(len + 1,
2544                                                                  GFP_KERNEL);
2545                                         if (ses->serverNOS == NULL)
2546                                                 goto sesssetup_nomem;
2547                                         strncpy(ses->serverNOS, bcc_ptr, len);
2548                                         bcc_ptr += len;
2549                                         bcc_ptr[0] = 0;
2550                                         bcc_ptr++;
2551
2552                                         len = strnlen(bcc_ptr, 1024);
2553                                         if (ses->serverDomain)
2554                                                 kfree(ses->serverDomain);
2555                                         ses->serverDomain = kzalloc(len + 1,
2556                                                                     GFP_KERNEL);
2557                                         if (ses->serverDomain == NULL)
2558                                                 goto sesssetup_nomem;
2559                                         strncpy(ses->serverDomain, bcc_ptr,
2560                                                 len);
2561                                         bcc_ptr += len;
2562                                         bcc_ptr[0] = 0;
2563                                         bcc_ptr++;
2564                                 } else
2565                                         cFYI(1,
2566                                              ("Variable field of length %d "
2567                                                 "extends beyond end of smb ",
2568                                               len));
2569                         }
2570                 } else {
2571                         cERROR(1,
2572                                (" Security Blob Length extends beyond "
2573                                 "end of SMB"));
2574                 }
2575         } else {
2576                 cERROR(1,
2577                        (" Invalid Word count %d: ",
2578                         smb_buffer_response->WordCount));
2579                 rc = -EIO;
2580         }
2581 sesssetup_nomem:        /* do not return an error on nomem for the info strings,
2582                            since that could make reconnection harder, and
2583                            reconnection might be needed to free memory */
2584         cifs_buf_release(smb_buffer);
2585
2586         return rc;
2587 }
2588
2589 static int
2590 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2591                               struct cifsSesInfo *ses, bool *pNTLMv2_flag,
2592                               const struct nls_table *nls_codepage)
2593 {
2594         struct smb_hdr *smb_buffer;
2595         struct smb_hdr *smb_buffer_response;
2596         SESSION_SETUP_ANDX *pSMB;
2597         SESSION_SETUP_ANDX *pSMBr;
2598         char *bcc_ptr;
2599         char *domain;
2600         int rc = 0;
2601         int remaining_words = 0;
2602         int bytes_returned = 0;
2603         int len;
2604         int SecurityBlobLength = sizeof(NEGOTIATE_MESSAGE);
2605         PNEGOTIATE_MESSAGE SecurityBlob;
2606         PCHALLENGE_MESSAGE SecurityBlob2;
2607         __u32 negotiate_flags, capabilities;
2608         __u16 count;
2609
2610         cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
2611         if (ses == NULL)
2612                 return -EINVAL;
2613         domain = ses->domainName;
2614         *pNTLMv2_flag = false;
2615         smb_buffer = cifs_buf_get();
2616         if (smb_buffer == NULL) {
2617                 return -ENOMEM;
2618         }
2619         smb_buffer_response = smb_buffer;
2620         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2621         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2622
2623         /* send SMBsessionSetup here */
2624         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2625                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2626
2627         smb_buffer->Mid = GetNextMid(ses->server);
2628         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2629         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2630
2631         pSMB->req.AndXCommand = 0xFF;
2632         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2633         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2634
2635         if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2636                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2637
2638         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2639             CAP_EXTENDED_SECURITY;
2640         if (ses->capabilities & CAP_UNICODE) {
2641                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2642                 capabilities |= CAP_UNICODE;
2643         }
2644         if (ses->capabilities & CAP_STATUS32) {
2645                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2646                 capabilities |= CAP_STATUS32;
2647         }
2648         if (ses->capabilities & CAP_DFS) {
2649                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2650                 capabilities |= CAP_DFS;
2651         }
2652         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2653
2654         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2655         SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2656         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2657         SecurityBlob->MessageType = NtLmNegotiate;
2658         negotiate_flags =
2659             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2660             NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
2661             NTLMSSP_NEGOTIATE_56 |
2662             /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2663         if (sign_CIFS_PDUs)
2664                 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2665 /*      if (ntlmv2_support)
2666                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;*/
2667         /* setup pointers to domain name and workstation name */
2668         bcc_ptr += SecurityBlobLength;
2669
2670         SecurityBlob->WorkstationName.Buffer = 0;
2671         SecurityBlob->WorkstationName.Length = 0;
2672         SecurityBlob->WorkstationName.MaximumLength = 0;
2673
2674         /* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
2675         along with username on auth request (ie the response to challenge) */
2676         SecurityBlob->DomainName.Buffer = 0;
2677         SecurityBlob->DomainName.Length = 0;
2678         SecurityBlob->DomainName.MaximumLength = 0;
2679         if (ses->capabilities & CAP_UNICODE) {
2680                 if ((long) bcc_ptr % 2) {
2681                         *bcc_ptr = 0;
2682                         bcc_ptr++;
2683                 }
2684
2685                 bytes_returned =
2686                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2687                                   32, nls_codepage);
2688                 bcc_ptr += 2 * bytes_returned;
2689                 bytes_returned =
2690                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
2691                                   nls_codepage);
2692                 bcc_ptr += 2 * bytes_returned;
2693                 bcc_ptr += 2;   /* null terminate Linux version */
2694                 bytes_returned =
2695                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2696                                   64, nls_codepage);
2697                 bcc_ptr += 2 * bytes_returned;
2698                 *(bcc_ptr + 1) = 0;
2699                 *(bcc_ptr + 2) = 0;
2700                 bcc_ptr += 2;   /* null terminate network opsys string */
2701                 *(bcc_ptr + 1) = 0;
2702                 *(bcc_ptr + 2) = 0;
2703                 bcc_ptr += 2;   /* null domain */
2704         } else {                /* ASCII */
2705                 strcpy(bcc_ptr, "Linux version ");
2706                 bcc_ptr += strlen("Linux version ");
2707                 strcpy(bcc_ptr, utsname()->release);
2708                 bcc_ptr += strlen(utsname()->release) + 1;
2709                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2710                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2711                 bcc_ptr++;      /* empty domain field */
2712                 *bcc_ptr = 0;
2713         }
2714         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2715         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2716         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2717         smb_buffer->smb_buf_length += count;
2718         pSMB->req.ByteCount = cpu_to_le16(count);
2719
2720         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2721                          &bytes_returned, CIFS_LONG_OP);
2722
2723         if (smb_buffer_response->Status.CifsError ==
2724             cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
2725                 rc = 0;
2726
2727         if (rc) {
2728 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2729         } else if ((smb_buffer_response->WordCount == 3)
2730                    || (smb_buffer_response->WordCount == 4)) {
2731                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2732                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2733
2734                 if (action & GUEST_LOGIN)
2735                         cFYI(1, (" Guest login"));
2736         /* Do we want to set anything in SesInfo struct when guest login? */
2737
2738                 bcc_ptr = pByteArea(smb_buffer_response);
2739         /* response can have either 3 or 4 word count - Samba sends 3 */
2740
2741                 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
2742                 if (SecurityBlob2->MessageType != NtLmChallenge) {
2743                         cFYI(1,
2744                              ("Unexpected NTLMSSP message type received %d",
2745                               SecurityBlob2->MessageType));
2746                 } else if (ses) {
2747                         ses->Suid = smb_buffer_response->Uid; /* UID left in le format */
2748                         cFYI(1, ("UID = %d", ses->Suid));
2749                         if ((pSMBr->resp.hdr.WordCount == 3)
2750                             || ((pSMBr->resp.hdr.WordCount == 4)
2751                                 && (blob_len <
2752                                     pSMBr->resp.ByteCount))) {
2753
2754                                 if (pSMBr->resp.hdr.WordCount == 4) {
2755                                         bcc_ptr += blob_len;
2756                                         cFYI(1, ("Security Blob Length %d",
2757                                               blob_len));
2758                                 }
2759
2760                                 cFYI(1, ("NTLMSSP Challenge rcvd"));
2761
2762                                 memcpy(ses->server->cryptKey,
2763                                        SecurityBlob2->Challenge,
2764                                        CIFS_CRYPTO_KEY_SIZE);
2765                                 if (SecurityBlob2->NegotiateFlags &
2766                                         cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
2767                                         *pNTLMv2_flag = true;
2768
2769                                 if ((SecurityBlob2->NegotiateFlags &
2770                                         cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN))
2771                                         || (sign_CIFS_PDUs > 1))
2772                                                 ses->server->secMode |=
2773                                                         SECMODE_SIGN_REQUIRED;
2774                                 if ((SecurityBlob2->NegotiateFlags &
2775                                         cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
2776                                                 ses->server->secMode |=
2777                                                         SECMODE_SIGN_ENABLED;
2778
2779                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2780                                         if ((long) (bcc_ptr) % 2) {
2781                                                 remaining_words =
2782                                                     (BCC(smb_buffer_response)
2783                                                      - 1) / 2;
2784                                          /* Must word align unicode strings */
2785                                                 bcc_ptr++;
2786                                         } else {
2787                                                 remaining_words =
2788                                                     BCC
2789                                                     (smb_buffer_response) / 2;
2790                                         }
2791                                         len =
2792                                             UniStrnlen((wchar_t *) bcc_ptr,
2793                                                        remaining_words - 1);
2794 /* We look for obvious messed up bcc or strings in response so we do not go off
2795    the end since (at least) WIN2K and Windows XP have a major bug in not null
2796    terminating last Unicode string in response  */
2797                                         if (ses->serverOS)
2798                                                 kfree(ses->serverOS);
2799                                         ses->serverOS =
2800                                             kzalloc(2 * (len + 1), GFP_KERNEL);
2801                                         cifs_strfromUCS_le(ses->serverOS,
2802                                                            (__le16 *)
2803                                                            bcc_ptr, len,
2804                                                            nls_codepage);
2805                                         bcc_ptr += 2 * (len + 1);
2806                                         remaining_words -= len + 1;
2807                                         ses->serverOS[2 * len] = 0;
2808                                         ses->serverOS[1 + (2 * len)] = 0;
2809                                         if (remaining_words > 0) {
2810                                                 len = UniStrnlen((wchar_t *)
2811                                                                  bcc_ptr,
2812                                                                  remaining_words
2813                                                                  - 1);
2814                                                 kfree(ses->serverNOS);
2815                                                 ses->serverNOS =
2816                                                     kzalloc(2 * (len + 1),
2817                                                             GFP_KERNEL);
2818                                                 cifs_strfromUCS_le(ses->
2819                                                                    serverNOS,
2820                                                                    (__le16 *)
2821                                                                    bcc_ptr,
2822                                                                    len,
2823                                                                    nls_codepage);
2824                                                 bcc_ptr += 2 * (len + 1);
2825                                                 ses->serverNOS[2 * len] = 0;
2826                                                 ses->serverNOS[1 +
2827                                                                (2 * len)] = 0;
2828                                                 remaining_words -= len + 1;
2829                                                 if (remaining_words > 0) {
2830                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2831                                 /* last string not always null terminated
2832                                    (for e.g. for Windows XP & 2000) */
2833                                                         kfree(ses->serverDomain);
2834                                                         ses->serverDomain =
2835                                                             kzalloc(2 *
2836                                                                     (len +
2837                                                                      1),
2838                                                                     GFP_KERNEL);
2839                                                         cifs_strfromUCS_le
2840                                                             (ses->serverDomain,
2841                                                              (__le16 *)bcc_ptr,
2842                                                              len, nls_codepage);
2843                                                         bcc_ptr +=
2844                                                             2 * (len + 1);
2845                                                         ses->serverDomain[2*len]
2846                                                             = 0;
2847                                                         ses->serverDomain
2848                                                                 [1 + (2 * len)]
2849                                                             = 0;
2850                                                 } /* else no more room so create dummy domain string */
2851                                                 else {
2852                                                         kfree(ses->serverDomain);
2853                                                         ses->serverDomain =
2854                                                             kzalloc(2,
2855                                                                     GFP_KERNEL);
2856                                                 }
2857                                         } else {        /* no room so create dummy domain and NOS string */
2858                                                 kfree(ses->serverDomain);
2859                                                 ses->serverDomain =
2860                                                     kzalloc(2, GFP_KERNEL);
2861                                                 kfree(ses->serverNOS);
2862                                                 ses->serverNOS =
2863                                                     kzalloc(2, GFP_KERNEL);
2864                                         }
2865                                 } else {        /* ASCII */
2866                                         len = strnlen(bcc_ptr, 1024);
2867                                         if (((long) bcc_ptr + len) - (long)
2868                                             pByteArea(smb_buffer_response)
2869                                             <= BCC(smb_buffer_response)) {
2870                                                 if (ses->serverOS)
2871                                                         kfree(ses->serverOS);
2872                                                 ses->serverOS =
2873                                                     kzalloc(len + 1,
2874                                                             GFP_KERNEL);
2875                                                 strncpy(ses->serverOS,
2876                                                         bcc_ptr, len);
2877
2878                                                 bcc_ptr += len;
2879                                                 bcc_ptr[0] = 0; /* null terminate string */
2880                                                 bcc_ptr++;
2881
2882                                                 len = strnlen(bcc_ptr, 1024);
2883                                                 kfree(ses->serverNOS);
2884                                                 ses->serverNOS =
2885                                                     kzalloc(len + 1,
2886                                                             GFP_KERNEL);
2887                                                 strncpy(ses->serverNOS, bcc_ptr, len);
2888                                                 bcc_ptr += len;
2889                                                 bcc_ptr[0] = 0;
2890                                                 bcc_ptr++;
2891
2892                                                 len = strnlen(bcc_ptr, 1024);
2893                                                 kfree(ses->serverDomain);
2894                                                 ses->serverDomain =
2895                                                     kzalloc(len + 1,
2896                                                             GFP_KERNEL);
2897                                                 strncpy(ses->serverDomain,
2898                                                         bcc_ptr, len);
2899                                                 bcc_ptr += len;
2900                                                 bcc_ptr[0] = 0;
2901                                                 bcc_ptr++;
2902                                         } else
2903                                                 cFYI(1,
2904                                                      ("field of length %d "
2905                                                     "extends beyond end of smb",
2906                                                       len));
2907                                 }
2908                         } else {
2909                                 cERROR(1, ("Security Blob Length extends beyond"
2910                                            " end of SMB"));
2911                         }
2912                 } else {
2913                         cERROR(1, ("No session structure passed in."));
2914                 }
2915         } else {
2916                 cERROR(1,
2917                        (" Invalid Word count %d:",
2918                         smb_buffer_response->WordCount));
2919                 rc = -EIO;
2920         }
2921
2922         cifs_buf_release(smb_buffer);
2923
2924         return rc;
2925 }
2926 static int
2927 CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2928                         char *ntlm_session_key, bool ntlmv2_flag,
2929                         const struct nls_table *nls_codepage)
2930 {
2931         struct smb_hdr *smb_buffer;
2932         struct smb_hdr *smb_buffer_response;
2933         SESSION_SETUP_ANDX *pSMB;
2934         SESSION_SETUP_ANDX *pSMBr;
2935         char *bcc_ptr;
2936         char *user;
2937         char *domain;
2938         int rc = 0;
2939         int remaining_words = 0;
2940         int bytes_returned = 0;
2941         int len;
2942         int SecurityBlobLength = sizeof(AUTHENTICATE_MESSAGE);
2943         PAUTHENTICATE_MESSAGE SecurityBlob;
2944         __u32 negotiate_flags, capabilities;
2945         __u16 count;
2946
2947         cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
2948         if (ses == NULL)
2949                 return -EINVAL;
2950         user = ses->userName;
2951         domain = ses->domainName;
2952         smb_buffer = cifs_buf_get();
2953         if (smb_buffer == NULL) {
2954                 return -ENOMEM;
2955         }
2956         smb_buffer_response = smb_buffer;
2957         pSMB = (SESSION_SETUP_ANDX *)smb_buffer;
2958         pSMBr = (SESSION_SETUP_ANDX *)smb_buffer_response;
2959
2960         /* send SMBsessionSetup here */
2961         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2962                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2963
2964         smb_buffer->Mid = GetNextMid(ses->server);
2965         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2966         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2967         pSMB->req.AndXCommand = 0xFF;
2968         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2969         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2970
2971         pSMB->req.hdr.Uid = ses->Suid;
2972
2973         if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2974                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2975
2976         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2977                         CAP_EXTENDED_SECURITY;
2978         if (ses->capabilities & CAP_UNICODE) {
2979                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2980                 capabilities |= CAP_UNICODE;
2981         }
2982         if (ses->capabilities & CAP_STATUS32) {
2983                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2984                 capabilities |= CAP_STATUS32;
2985         }
2986         if (ses->capabilities & CAP_DFS) {
2987                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2988                 capabilities |= CAP_DFS;
2989         }
2990         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2991
2992         bcc_ptr = (char *)&pSMB->req.SecurityBlob;
2993         SecurityBlob = (PAUTHENTICATE_MESSAGE)bcc_ptr;
2994         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2995         SecurityBlob->MessageType = NtLmAuthenticate;
2996         bcc_ptr += SecurityBlobLength;
2997         negotiate_flags = NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
2998                         NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
2999                         0x80000000 | NTLMSSP_NEGOTIATE_128;
3000         if (sign_CIFS_PDUs)
3001                 negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
3002         if (ntlmv2_flag)
3003                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
3004
3005 /* setup pointers to domain name and workstation name */
3006
3007         SecurityBlob->WorkstationName.Buffer = 0;
3008         SecurityBlob->WorkstationName.Length = 0;
3009         SecurityBlob->WorkstationName.MaximumLength = 0;
3010         SecurityBlob->SessionKey.Length = 0;
3011         SecurityBlob->SessionKey.MaximumLength = 0;
3012         SecurityBlob->SessionKey.Buffer = 0;
3013
3014         SecurityBlob->LmChallengeResponse.Length = 0;
3015         SecurityBlob->LmChallengeResponse.MaximumLength = 0;
3016         SecurityBlob->LmChallengeResponse.Buffer = 0;
3017
3018         SecurityBlob->NtChallengeResponse.Length =
3019             cpu_to_le16(CIFS_SESS_KEY_SIZE);
3020         SecurityBlob->NtChallengeResponse.MaximumLength =
3021             cpu_to_le16(CIFS_SESS_KEY_SIZE);
3022         memcpy(bcc_ptr, ntlm_session_key, CIFS_SESS_KEY_SIZE);
3023         SecurityBlob->NtChallengeResponse.Buffer =
3024             cpu_to_le32(SecurityBlobLength);
3025         SecurityBlobLength += CIFS_SESS_KEY_SIZE;
3026         bcc_ptr += CIFS_SESS_KEY_SIZE;
3027
3028         if (ses->capabilities & CAP_UNICODE) {
3029                 if (domain == NULL) {
3030                         SecurityBlob->DomainName.Buffer = 0;
3031                         SecurityBlob->DomainName.Length = 0;
3032                         SecurityBlob->DomainName.MaximumLength = 0;
3033                 } else {
3034                         __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
3035                                           nls_codepage);
3036                         ln *= 2;
3037                         SecurityBlob->DomainName.MaximumLength =
3038                             cpu_to_le16(ln);
3039                         SecurityBlob->DomainName.Buffer =
3040                             cpu_to_le32(SecurityBlobLength);
3041                         bcc_ptr += ln;
3042                         SecurityBlobLength += ln;
3043                         SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3044                 }
3045                 if (user == NULL) {
3046                         SecurityBlob->UserName.Buffer = 0;
3047                         SecurityBlob->UserName.Length = 0;
3048                         SecurityBlob->UserName.MaximumLength = 0;
3049                 } else {
3050                         __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
3051                                           nls_codepage);
3052                         ln *= 2;
3053                         SecurityBlob->UserName.MaximumLength =
3054                             cpu_to_le16(ln);
3055                         SecurityBlob->UserName.Buffer =
3056                             cpu_to_le32(SecurityBlobLength);
3057                         bcc_ptr += ln;
3058                         SecurityBlobLength += ln;
3059                         SecurityBlob->UserName.Length = cpu_to_le16(ln);
3060                 }
3061
3062                 /* SecurityBlob->WorkstationName.Length =
3063                  cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
3064                    SecurityBlob->WorkstationName.Length *= 2;
3065                    SecurityBlob->WorkstationName.MaximumLength =
3066                         cpu_to_le16(SecurityBlob->WorkstationName.Length);
3067                    SecurityBlob->WorkstationName.Buffer =
3068                                  cpu_to_le32(SecurityBlobLength);
3069                    bcc_ptr += SecurityBlob->WorkstationName.Length;
3070                    SecurityBlobLength += SecurityBlob->WorkstationName.Length;
3071                    SecurityBlob->WorkstationName.Length =
3072                         cpu_to_le16(SecurityBlob->WorkstationName.Length);  */
3073
3074                 if ((long) bcc_ptr % 2) {
3075                         *bcc_ptr = 0;
3076                         bcc_ptr++;
3077                 }
3078                 bytes_returned =
3079                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
3080                                   32, nls_codepage);
3081                 bcc_ptr += 2 * bytes_returned;
3082                 bytes_returned =
3083                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
3084                                   nls_codepage);
3085                 bcc_ptr += 2 * bytes_returned;
3086                 bcc_ptr += 2;   /* null term version string */
3087                 bytes_returned =
3088                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
3089                                   64, nls_codepage);
3090                 bcc_ptr += 2 * bytes_returned;
3091                 *(bcc_ptr + 1) = 0;
3092                 *(bcc_ptr + 2) = 0;
3093                 bcc_ptr += 2;   /* null terminate network opsys string */
3094                 *(bcc_ptr + 1) = 0;
3095                 *(bcc_ptr + 2) = 0;
3096                 bcc_ptr += 2;   /* null domain */
3097         } else {                /* ASCII */
3098                 if (domain == NULL) {
3099                         SecurityBlob->DomainName.Buffer = 0;
3100                         SecurityBlob->DomainName.Length = 0;
3101                         SecurityBlob->DomainName.MaximumLength = 0;
3102                 } else {
3103                         __u16 ln;
3104                         negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
3105                         strncpy(bcc_ptr, domain, 63);
3106                         ln = strnlen(domain, 64);
3107                         SecurityBlob->DomainName.MaximumLength =
3108                             cpu_to_le16(ln);
3109                         SecurityBlob->DomainName.Buffer =
3110                             cpu_to_le32(SecurityBlobLength);
3111                         bcc_ptr += ln;
3112                         SecurityBlobLength += ln;
3113                         SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3114                 }
3115                 if (user == NULL) {
3116                         SecurityBlob->UserName.Buffer = 0;
3117                         SecurityBlob->UserName.Length = 0;
3118                         SecurityBlob->UserName.MaximumLength = 0;
3119                 } else {
3120                         __u16 ln;
3121                         strncpy(bcc_ptr, user, 63);
3122                         ln = strnlen(user, 64);
3123                         SecurityBlob->UserName.MaximumLength = cpu_to_le16(ln);
3124                         SecurityBlob->UserName.Buffer =
3125                                                 cpu_to_le32(SecurityBlobLength);
3126                         bcc_ptr += ln;
3127                         SecurityBlobLength += ln;
3128                         SecurityBlob->UserName.Length = cpu_to_le16(ln);
3129                 }
3130                 /* BB fill in our workstation name if known BB */
3131
3132                 strcpy(bcc_ptr, "Linux version ");
3133                 bcc_ptr += strlen("Linux version ");
3134                 strcpy(bcc_ptr, utsname()->release);
3135                 bcc_ptr += strlen(utsname()->release) + 1;
3136                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
3137                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
3138                 bcc_ptr++;      /* null domain */
3139                 *bcc_ptr = 0;
3140         }
3141         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
3142         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
3143         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
3144         smb_buffer->smb_buf_length += count;
3145         pSMB->req.ByteCount = cpu_to_le16(count);
3146
3147         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
3148                          &bytes_returned, CIFS_LONG_OP);
3149         if (rc) {
3150 /*   rc = map_smb_to_linux_error(smb_buffer_response) done in SendReceive now */
3151         } else if ((smb_buffer_response->WordCount == 3) ||
3152                    (smb_buffer_response->WordCount == 4)) {
3153                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
3154                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
3155                 if (action & GUEST_LOGIN)
3156                         cFYI(1, (" Guest login")); /* BB Should we set anything
3157                                                          in SesInfo struct ? */
3158 /*              if (SecurityBlob2->MessageType != NtLm??) {
3159                         cFYI("Unexpected message type on auth response is %d"));
3160                 } */
3161
3162                 if (ses) {
3163                         cFYI(1,
3164                              ("Check challenge UID %d vs auth response UID %d",
3165                               ses->Suid, smb_buffer_response->Uid));
3166                         /* UID left in wire format */
3167                         ses->Suid = smb_buffer_response->Uid;
3168                         bcc_ptr = pByteArea(smb_buffer_response);
3169                 /* response can have either 3 or 4 word count - Samba sends 3 */
3170                         if ((pSMBr->resp.hdr.WordCount == 3)
3171                             || ((pSMBr->resp.hdr.WordCount == 4)
3172                                 && (blob_len <
3173                                     pSMBr->resp.ByteCount))) {
3174                                 if (pSMBr->resp.hdr.WordCount == 4) {
3175                                         bcc_ptr +=
3176                                             blob_len;
3177                                         cFYI(1,
3178                                              ("Security Blob Length %d ",
3179                                               blob_len));
3180                                 }
3181
3182                                 cFYI(1,
3183                                      ("NTLMSSP response to Authenticate "));
3184
3185                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3186                                         if ((long) (bcc_ptr) % 2) {
3187                                                 remaining_words =
3188                                                     (BCC(smb_buffer_response)
3189                                                      - 1) / 2;
3190                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
3191                                         } else {
3192                                                 remaining_words = BCC(smb_buffer_response) / 2;
3193                                         }
3194                                         len = UniStrnlen((wchar_t *) bcc_ptr,
3195                                                         remaining_words - 1);
3196 /* We look for obvious messed up bcc or strings in response so we do not go off
3197   the end since (at least) WIN2K and Windows XP have a major bug in not null
3198   terminating last Unicode string in response  */
3199                                         if (ses->serverOS)
3200                                                 kfree(ses->serverOS);
3201                                         ses->serverOS =
3202                                             kzalloc(2 * (len + 1), GFP_KERNEL);
3203                                         cifs_strfromUCS_le(ses->serverOS,
3204                                                            (__le16 *)
3205                                                            bcc_ptr, len,
3206                                                            nls_codepage);
3207                                         bcc_ptr += 2 * (len + 1);
3208                                         remaining_words -= len + 1;
3209                                         ses->serverOS[2 * len] = 0;
3210                                         ses->serverOS[1 + (2 * len)] = 0;
3211                                         if (remaining_words > 0) {
3212                                                 len = UniStrnlen((wchar_t *)
3213                                                                  bcc_ptr,
3214                                                                  remaining_words
3215                                                                  - 1);
3216                                                 kfree(ses->serverNOS);
3217                                                 ses->serverNOS =
3218                                                     kzalloc(2 * (len + 1),
3219                                                             GFP_KERNEL);
3220                                                 cifs_strfromUCS_le(ses->
3221                                                                    serverNOS,
3222                                                                    (__le16 *)
3223                                                                    bcc_ptr,
3224                                                                    len,
3225                                                                    nls_codepage);
3226                                                 bcc_ptr += 2 * (len + 1);
3227                                                 ses->serverNOS[2 * len] = 0;
3228                                                 ses->serverNOS[1+(2*len)] = 0;
3229                                                 remaining_words -= len + 1;
3230                                                 if (remaining_words > 0) {
3231                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3232      /* last string not always null terminated (e.g. for Windows XP & 2000) */
3233                                                         if (ses->serverDomain)
3234                                                                 kfree(ses->serverDomain);
3235                                                         ses->serverDomain =
3236                                                             kzalloc(2 *
3237                                                                     (len +
3238                                                                      1),
3239                                                                     GFP_KERNEL);
3240                                                         cifs_strfromUCS_le
3241                                                             (ses->
3242                                                              serverDomain,
3243                                                              (__le16 *)
3244                                                              bcc_ptr, len,
3245                                                              nls_codepage);
3246                                                         bcc_ptr +=
3247                                                             2 * (len + 1);
3248                                                         ses->
3249                                                             serverDomain[2
3250                                                                          * len]
3251                                                             = 0;
3252                                                         ses->
3253                                                             serverDomain[1
3254                                                                          +
3255                                                                          (2
3256                                                                           *
3257                                                                           len)]
3258                                                             = 0;
3259                                                 } /* else no more room so create dummy domain string */
3260                                                 else {
3261                                                         if (ses->serverDomain)
3262                                                                 kfree(ses->serverDomain);
3263                                                         ses->serverDomain = kzalloc(2,GFP_KERNEL);
3264                                                 }
3265                                         } else {  /* no room so create dummy domain and NOS string */
3266                                                 if (ses->serverDomain)
3267                                                         kfree(ses->serverDomain);
3268                                                 ses->serverDomain = kzalloc(2, GFP_KERNEL);
3269                                                 kfree(ses->serverNOS);
3270                                                 ses->serverNOS = kzalloc(2, GFP_KERNEL);
3271                                         }
3272                                 } else {        /* ASCII */
3273                                         len = strnlen(bcc_ptr, 1024);
3274                                         if (((long) bcc_ptr + len) -
3275                                            (long) pByteArea(smb_buffer_response)
3276                                                 <= BCC(smb_buffer_response)) {
3277                                                 if (ses->serverOS)
3278                                                         kfree(ses->serverOS);
3279                                                 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
3280                                                 strncpy(ses->serverOS,bcc_ptr, len);
3281
3282                                                 bcc_ptr += len;
3283                                                 bcc_ptr[0] = 0; /* null terminate the string */
3284                                                 bcc_ptr++;
3285
3286                                                 len = strnlen(bcc_ptr, 1024);
3287                                                 kfree(ses->serverNOS);
3288                                                 ses->serverNOS = kzalloc(len+1,
3289                                                                     GFP_KERNEL);
3290                                                 strncpy(ses->serverNOS,
3291                                                         bcc_ptr, len);
3292                                                 bcc_ptr += len;
3293                                                 bcc_ptr[0] = 0;
3294                                                 bcc_ptr++;
3295
3296                                                 len = strnlen(bcc_ptr, 1024);
3297                                                 if (ses->serverDomain)
3298                                                         kfree(ses->serverDomain);
3299                                                 ses->serverDomain =
3300                                                                 kzalloc(len+1,
3301                                                                     GFP_KERNEL);
3302                                                 strncpy(ses->serverDomain,
3303                                                         bcc_ptr, len);
3304                                                 bcc_ptr += len;
3305                                                 bcc_ptr[0] = 0;
3306                                                 bcc_ptr++;
3307                                         } else
3308                                                 cFYI(1, ("field of length %d "
3309                                                    "extends beyond end of smb ",
3310                                                       len));
3311                                 }
3312                         } else {
3313                                 cERROR(1, ("Security Blob extends beyond end "
3314                                         "of SMB"));
3315                         }
3316                 } else {
3317                         cERROR(1, ("No session structure passed in."));
3318                 }
3319         } else {
3320                 cERROR(1, ("Invalid Word count %d: ",
3321                         smb_buffer_response->WordCount));
3322                 rc = -EIO;
3323         }
3324
3325         cifs_buf_release(smb_buffer);
3326
3327         return rc;
3328 }
3329
3330 int
3331 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
3332          const char *tree, struct cifsTconInfo *tcon,
3333          const struct nls_table *nls_codepage)
3334 {
3335         struct smb_hdr *smb_buffer;
3336         struct smb_hdr *smb_buffer_response;
3337         TCONX_REQ *pSMB;
3338         TCONX_RSP *pSMBr;
3339         unsigned char *bcc_ptr;
3340         int rc = 0;
3341         int length;
3342         __u16 count;
3343
3344         if (ses == NULL)
3345                 return -EIO;
3346
3347         smb_buffer = cifs_buf_get();
3348         if (smb_buffer == NULL) {
3349                 return -ENOMEM;
3350         }
3351         smb_buffer_response = smb_buffer;
3352
3353         header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3354                         NULL /*no tid */ , 4 /*wct */ );
3355
3356         smb_buffer->Mid = GetNextMid(ses->server);
3357         smb_buffer->Uid = ses->Suid;
3358         pSMB = (TCONX_REQ *) smb_buffer;
3359         pSMBr = (TCONX_RSP *) smb_buffer_response;
3360
3361         pSMB->AndXCommand = 0xFF;
3362         pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3363         bcc_ptr = &pSMB->Password[0];
3364         if ((ses->server->secMode) & SECMODE_USER) {
3365                 pSMB->PasswordLength = cpu_to_le16(1);  /* minimum */
3366                 *bcc_ptr = 0; /* password is null byte */
3367                 bcc_ptr++;              /* skip password */
3368                 /* already aligned so no need to do it below */
3369         } else {
3370                 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
3371                 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3372                    specified as required (when that support is added to
3373                    the vfs in the future) as only NTLM or the much
3374                    weaker LANMAN (which we do not send by default) is accepted
3375                    by Samba (not sure whether other servers allow
3376                    NTLMv2 password here) */
3377 #ifdef CONFIG_CIFS_WEAK_PW_HASH
3378                 if ((extended_security & CIFSSEC_MAY_LANMAN) &&
3379                         (ses->server->secType == LANMAN))
3380                         calc_lanman_hash(ses, bcc_ptr);
3381                 else
3382 #endif /* CIFS_WEAK_PW_HASH */
3383                 SMBNTencrypt(ses->password,
3384                              ses->server->cryptKey,
3385                              bcc_ptr);
3386
3387                 bcc_ptr += CIFS_SESS_KEY_SIZE;
3388                 if (ses->capabilities & CAP_UNICODE) {
3389                         /* must align unicode strings */
3390                         *bcc_ptr = 0; /* null byte password */
3391                         bcc_ptr++;
3392                 }
3393         }
3394
3395         if (ses->server->secMode &
3396                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3397                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3398
3399         if (ses->capabilities & CAP_STATUS32) {
3400                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3401         }
3402         if (ses->capabilities & CAP_DFS) {
3403                 smb_buffer->Flags2 |= SMBFLG2_DFS;
3404         }
3405         if (ses->capabilities & CAP_UNICODE) {
3406                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3407                 length =
3408                     cifs_strtoUCS((__le16 *) bcc_ptr, tree,
3409                         6 /* max utf8 char length in bytes */ *
3410                         (/* server len*/ + 256 /* share len */), nls_codepage);
3411                 bcc_ptr += 2 * length;  /* convert num 16 bit words to bytes */
3412                 bcc_ptr += 2;   /* skip trailing null */
3413         } else {                /* ASCII */
3414                 strcpy(bcc_ptr, tree);
3415                 bcc_ptr += strlen(tree) + 1;
3416         }
3417         strcpy(bcc_ptr, "?????");
3418         bcc_ptr += strlen("?????");
3419         bcc_ptr += 1;
3420         count = bcc_ptr - &pSMB->Password[0];
3421         pSMB->hdr.smb_buf_length += count;
3422         pSMB->ByteCount = cpu_to_le16(count);
3423
3424         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
3425                          CIFS_STD_OP);
3426
3427         /* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
3428         /* above now done in SendReceive */
3429         if ((rc == 0) && (tcon != NULL)) {
3430                 tcon->tidStatus = CifsGood;
3431                 tcon->tid = smb_buffer_response->Tid;
3432                 bcc_ptr = pByteArea(smb_buffer_response);
3433                 length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
3434                 /* skip service field (NB: this field is always ASCII) */
3435                 if (length == 3) {
3436                         if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3437                             (bcc_ptr[2] == 'C')) {
3438                                 cFYI(1, ("IPC connection"));
3439                                 tcon->ipc = 1;
3440                         }
3441                 } else if (length == 2) {
3442                         if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3443                                 /* the most common case */
3444                                 cFYI(1, ("disk share connection"));
3445                         }
3446                 }
3447                 bcc_ptr += length + 1;
3448                 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3449                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3450                         length = UniStrnlen((wchar_t *) bcc_ptr, 512);
3451                         if ((bcc_ptr + (2 * length)) -
3452                              pByteArea(smb_buffer_response) <=
3453                             BCC(smb_buffer_response)) {
3454                                 kfree(tcon->nativeFileSystem);
3455                                 tcon->nativeFileSystem =
3456                                     kzalloc(length + 2, GFP_KERNEL);
3457                                 if (tcon->nativeFileSystem)
3458                                         cifs_strfromUCS_le(
3459                                                 tcon->nativeFileSystem,
3460                                                 (__le16 *) bcc_ptr,
3461                                                 length, nls_codepage);
3462                                 bcc_ptr += 2 * length;
3463                                 bcc_ptr[0] = 0; /* null terminate the string */
3464                                 bcc_ptr[1] = 0;
3465                                 bcc_ptr += 2;
3466                         }
3467                         /* else do not bother copying these information fields*/
3468                 } else {
3469                         length = strnlen(bcc_ptr, 1024);
3470                         if ((bcc_ptr + length) -
3471                             pByteArea(smb_buffer_response) <=
3472                             BCC(smb_buffer_response)) {
3473                                 kfree(tcon->nativeFileSystem);
3474                                 tcon->nativeFileSystem =
3475                                     kzalloc(length + 1, GFP_KERNEL);
3476                                 if (tcon->nativeFileSystem)
3477                                         strncpy(tcon->nativeFileSystem, bcc_ptr,
3478                                                 length);
3479                         }
3480                         /* else do not bother copying these information fields*/
3481                 }
3482                 if ((smb_buffer_response->WordCount == 3) ||
3483                          (smb_buffer_response->WordCount == 7))
3484                         /* field is in same location */
3485                         tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3486                 else
3487                         tcon->Flags = 0;
3488                 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
3489         } else if ((rc == 0) && tcon == NULL) {
3490                 /* all we need to save for IPC$ connection */
3491                 ses->ipc_tid = smb_buffer_response->Tid;
3492         }
3493
3494         cifs_buf_release(smb_buffer);
3495         return rc;
3496 }
3497
3498 int
3499 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3500 {
3501         int rc = 0;
3502         int xid;
3503         struct cifsSesInfo *ses = NULL;
3504         struct task_struct *cifsd_task;
3505         char *tmp;
3506
3507         xid = GetXid();
3508
3509         if (cifs_sb->tcon) {
3510                 ses = cifs_sb->tcon->ses; /* save ptr to ses before delete tcon!*/
3511                 rc = CIFSSMBTDis(xid, cifs_sb->tcon);
3512                 if (rc == -EBUSY) {
3513                         FreeXid(xid);
3514                         return 0;
3515                 }
3516                 DeleteTconOplockQEntries(cifs_sb->tcon);
3517                 tconInfoFree(cifs_sb->tcon);
3518                 if ((ses) && (ses->server)) {
3519                         /* save off task so we do not refer to ses later */
3520                         cifsd_task = ses->server->tsk;
3521                         cFYI(1, ("About to do SMBLogoff "));
3522                         rc = CIFSSMBLogoff(xid, ses);
3523                         if (rc == -EBUSY) {
3524                                 FreeXid(xid);
3525                                 return 0;
3526                         } else if (rc == -ESHUTDOWN) {
3527                                 cFYI(1, ("Waking up socket by sending signal"));
3528                                 if (cifsd_task) {
3529                                         force_sig(SIGKILL, cifsd_task);
3530                                         kthread_stop(cifsd_task);
3531                                 }
3532                                 rc = 0;
3533                         } /* else - we have an smb session
3534                                 left on this socket do not kill cifsd */
3535                 } else
3536                         cFYI(1, ("No session or bad tcon"));
3537         }
3538
3539         cifs_sb->tcon = NULL;
3540         tmp = cifs_sb->prepath;
3541         cifs_sb->prepathlen = 0;
3542         cifs_sb->prepath = NULL;
3543         kfree(tmp);
3544         if (ses)
3545                 sesInfoFree(ses);
3546
3547         FreeXid(xid);
3548         return rc;
3549 }
3550
3551 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3552                                            struct nls_table *nls_info)
3553 {
3554         int rc = 0;
3555         char ntlm_session_key[CIFS_SESS_KEY_SIZE];
3556         bool ntlmv2_flag = false;
3557         int first_time = 0;
3558
3559         /* what if server changes its buffer size after dropping the session? */
3560         if (pSesInfo->server->maxBuf == 0) /* no need to send on reconnect */ {
3561                 rc = CIFSSMBNegotiate(xid, pSesInfo);
3562                 if (rc == -EAGAIN) /* retry only once on 1st time connection */ {
3563                         rc = CIFSSMBNegotiate(xid, pSesInfo);
3564                         if (rc == -EAGAIN)
3565                                 rc = -EHOSTDOWN;
3566                 }
3567                 if (rc == 0) {
3568                         spin_lock(&GlobalMid_Lock);
3569                         if (pSesInfo->server->tcpStatus != CifsExiting)
3570                                 pSesInfo->server->tcpStatus = CifsGood;
3571                         else
3572                                 rc = -EHOSTDOWN;
3573                         spin_unlock(&GlobalMid_Lock);
3574
3575                 }
3576                 first_time = 1;
3577         }
3578         if (!rc) {
3579                 pSesInfo->flags = 0;
3580                 pSesInfo->capabilities = pSesInfo->server->capabilities;
3581                 if (linuxExtEnabled == 0)
3582                         pSesInfo->capabilities &= (~CAP_UNIX);
3583         /*      pSesInfo->sequence_number = 0;*/
3584                 cFYI(1,
3585                       ("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3586                         pSesInfo->server->secMode,
3587                         pSesInfo->server->capabilities,
3588                         pSesInfo->server->timeAdj));
3589                 if (experimEnabled < 2)
3590                         rc = CIFS_SessSetup(xid, pSesInfo,
3591                                             first_time, nls_info);
3592                 else if (extended_security
3593                                 && (pSesInfo->capabilities
3594                                         & CAP_EXTENDED_SECURITY)
3595                                 && (pSesInfo->server->secType == NTLMSSP)) {
3596                         rc = -EOPNOTSUPP;
3597                 } else if (extended_security
3598                            && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3599                            && (pSesInfo->server->secType == RawNTLMSSP)) {
3600                         cFYI(1, ("NTLMSSP sesssetup"));
3601                         rc = CIFSNTLMSSPNegotiateSessSetup(xid,
3602                                                 pSesInfo,
3603                                                 &ntlmv2_flag,
3604                                                 nls_info);
3605                         if (!rc) {
3606                                 if (ntlmv2_flag) {
3607                                         char *v2_response;
3608                                         cFYI(1, ("more secure NTLM ver2 hash"));
3609                                         if (CalcNTLMv2_partial_mac_key(pSesInfo,
3610                                                 nls_info)) {
3611                                                 rc = -ENOMEM;
3612                                                 goto ss_err_exit;
3613                                         } else
3614                                                 v2_response = kmalloc(16 + 64 /* blob */, GFP_KERNEL);
3615                                         if (v2_response) {
3616                                                 CalcNTLMv2_response(pSesInfo,
3617                                                                    v2_response);
3618                                 /*              if (first_time)
3619                                                   cifs_calculate_ntlmv2_mac_key(
3620                                                    pSesInfo->server->mac_signing_key,
3621                                                    response, ntlm_session_key,*/
3622                                                 kfree(v2_response);
3623                                         /* BB Put dummy sig in SessSetup PDU? */
3624                                         } else {
3625                                                 rc = -ENOMEM;
3626                                                 goto ss_err_exit;
3627                                         }
3628
3629                                 } else {
3630                                         SMBNTencrypt(pSesInfo->password,
3631                                                 pSesInfo->server->cryptKey,
3632                                                 ntlm_session_key);
3633
3634                                         if (first_time)
3635                                                 cifs_calculate_mac_key(
3636                                                         &pSesInfo->server->mac_signing_key,
3637                                                         ntlm_session_key,
3638                                                         pSesInfo->password);
3639                                 }
3640                         /* for better security the weaker lanman hash not sent
3641                            in AuthSessSetup so we no longer calculate it */
3642
3643                                 rc = CIFSNTLMSSPAuthSessSetup(xid,
3644                                         pSesInfo,
3645                                         ntlm_session_key,
3646                                         ntlmv2_flag,
3647                                         nls_info);
3648                         }
3649                 } else { /* old style NTLM 0.12 session setup */
3650                         SMBNTencrypt(pSesInfo->password,
3651                                 pSesInfo->server->cryptKey,
3652                                 ntlm_session_key);
3653
3654                         if (first_time)
3655                                 cifs_calculate_mac_key(
3656                                         &pSesInfo->server->mac_signing_key,
3657                                         ntlm_session_key, pSesInfo->password);
3658
3659                         rc = CIFSSessSetup(xid, pSesInfo,
3660                                 ntlm_session_key, nls_info);
3661                 }
3662                 if (rc) {
3663                         cERROR(1, ("Send error in SessSetup = %d", rc));
3664                 } else {
3665                         cFYI(1, ("CIFS Session Established successfully"));
3666                         pSesInfo->status = CifsGood;
3667                 }
3668         }
3669 ss_err_exit:
3670         return rc;
3671 }
3672