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   1 /*
   2  *   fs/cifs/connect.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2008
   5  *   Author(s): Steve French (sfrench@us.ibm.com)
   6  *
   7  *   This library is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU Lesser General Public License as published
   9  *   by the Free Software Foundation; either version 2.1 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This library is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  15  *   the GNU Lesser General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU Lesser General Public License
  18  *   along with this library; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21 #include <linux/fs.h>
  22 #include <linux/net.h>
  23 #include <linux/string.h>
  24 #include <linux/list.h>
  25 #include <linux/wait.h>
  26 #include <linux/ipv6.h>
  27 #include <linux/pagemap.h>
  28 #include <linux/ctype.h>
  29 #include <linux/utsname.h>
  30 #include <linux/mempool.h>
  31 #include <linux/delay.h>
  32 #include <linux/completion.h>
  33 #include <linux/kthread.h>
  34 #include <linux/pagevec.h>
  35 #include <linux/freezer.h>
  36 #include <asm/uaccess.h>
  37 #include <asm/processor.h>
  38 #include "cifspdu.h"
  39 #include "cifsglob.h"
  40 #include "cifsproto.h"
  41 #include "cifs_unicode.h"
  42 #include "cifs_debug.h"
  43 #include "cifs_fs_sb.h"
  44 #include "ntlmssp.h"
  45 #include "nterr.h"
  46 #include "rfc1002pdu.h"
  47 #include "cn_cifs.h"
  48
  49 #define CIFS_PORT 445
  50 #define RFC1001_PORT 139
  51
  52 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 noperm:1;
  79         bool no_psx_acl:1; /* set if posix acl support should be disabled */
  80         bool cifs_acl:1;
  81         bool no_xattr:1;   /* set if xattr (EA) support should be disabled*/
  82         bool server_ino:1; /* use inode numbers from server ie UniqueId */
  83         bool direct_io:1;
  84         bool remap:1;     /* set to remap seven reserved chars in filenames */
  85         bool posix_paths:1;   /* unset to not ask for posix pathnames. */
  86         bool no_linux_ext:1;
  87         bool sfu_emul:1;
  88         bool nullauth:1; /* attempt to authenticate with null user */
  89         unsigned nocase;     /* request case insensitive filenames */
  90         unsigned nobrl;      /* disable sending byte range locks to srv */
  91         unsigned int rsize;
  92         unsigned int wsize;
  93         unsigned int sockopt;
  94         unsigned short int port;
  95         char *prepath;
  96 };
  97
  98 static int ipv4_connect(struct sockaddr_in *psin_server,
  99                         struct socket **csocket,
 100                         char *netb_name,
 101                         char *server_netb_name);
 102 static int ipv6_connect(struct sockaddr_in6 *psin_server,
 103                         struct socket **csocket);
 104
 105
 106         /*
 107          * cifs tcp session reconnection
 108          *
 109          * mark tcp session as reconnecting so temporarily locked
 110          * mark all smb sessions as reconnecting for tcp session
 111          * reconnect tcp session
 112          * wake up waiters on reconnection? - (not needed currently)
 113          */
 114
 115 static int
 116 cifs_reconnect(struct TCP_Server_Info *server)
 117 {
 118         int rc = 0;
 119         struct list_head *tmp;
 120         struct cifsSesInfo *ses;
 121         struct cifsTconInfo *tcon;
 122         struct mid_q_entry *mid_entry;
 123
 124         spin_lock(&GlobalMid_Lock);
 125         if (kthread_should_stop()) {
 126                 /* the demux thread will exit normally
 127                 next time through the loop */
 128                 spin_unlock(&GlobalMid_Lock);
 129                 return rc;
 130         } else
 131                 server->tcpStatus = CifsNeedReconnect;
 132         spin_unlock(&GlobalMid_Lock);
 133         server->maxBuf = 0;
 134
 135         cFYI(1, ("Reconnecting tcp session"));
 136
 137         /* before reconnecting the tcp session, mark the smb session (uid)
 138                 and the tid bad so they are not used until reconnected */
 139         read_lock(&GlobalSMBSeslock);
 140         list_for_each(tmp, &GlobalSMBSessionList) {
 141                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
 142                 if (ses->server) {
 143                         if (ses->server == server) {
 144                                 ses->status = CifsNeedReconnect;
 145                                 ses->ipc_tid = 0;
 146                         }
 147                 }
 148                 /* else tcp and smb sessions need reconnection */
 149         }
 150         list_for_each(tmp, &GlobalTreeConnectionList) {
 151                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
 152                 if ((tcon) && (tcon->ses) && (tcon->ses->server == server))
 153                         tcon->tidStatus = CifsNeedReconnect;
 154         }
 155         read_unlock(&GlobalSMBSeslock);
 156         /* do not want to be sending data on a socket we are freeing */
 157         down(&server->tcpSem);
 158         if (server->ssocket) {
 159                 cFYI(1, ("State: 0x%x Flags: 0x%lx", server->ssocket->state,
 160                         server->ssocket->flags));
 161                 kernel_sock_shutdown(server->ssocket, SHUT_WR);
 162                 cFYI(1, ("Post shutdown state: 0x%x Flags: 0x%lx",
 163                         server->ssocket->state,
 164                         server->ssocket->flags));
 165                 sock_release(server->ssocket);
 166                 server->ssocket = NULL;
 167         }
 168
 169         spin_lock(&GlobalMid_Lock);
 170         list_for_each(tmp, &server->pending_mid_q) {
 171                 mid_entry = list_entry(tmp, struct
 172                                         mid_q_entry,
 173                                         qhead);
 174                 if (mid_entry) {
 175                         if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
 176                                 /* Mark other intransit requests as needing
 177                                    retry so we do not immediately mark the
 178                                    session bad again (ie after we reconnect
 179                                    below) as they timeout too */
 180                                 mid_entry->midState = MID_RETRY_NEEDED;
 181                         }
 182                 }
 183         }
 184         spin_unlock(&GlobalMid_Lock);
 185         up(&server->tcpSem);
 186
 187         while ((!kthread_should_stop()) && (server->tcpStatus != CifsGood)) {
 188                 try_to_freeze();
 189                 if (server->protocolType == IPV6) {
 190                         rc = ipv6_connect(&server->addr.sockAddr6,
 191                                           &server->ssocket);
 192                 } else {
 193                         rc = ipv4_connect(&server->addr.sockAddr,
 194                                         &server->ssocket,
 195                                         server->workstation_RFC1001_name,
 196                                         server->server_RFC1001_name);
 197                 }
 198                 if (rc) {
 199                         cFYI(1, ("reconnect error %d", rc));
 200                         msleep(3000);
 201                 } else {
 202                         atomic_inc(&tcpSesReconnectCount);
 203                         spin_lock(&GlobalMid_Lock);
 204                         if (!kthread_should_stop())
 205                                 server->tcpStatus = CifsGood;
 206                         server->sequence_number = 0;
 207                         spin_unlock(&GlobalMid_Lock);
 208         /*              atomic_set(&server->inFlight,0);*/
 209                         wake_up(&server->response_q);
 210                 }
 211         }
 212         return rc;
 213 }
 214
 215 /*
 216         return codes:
 217                 0       not a transact2, or all data present
 218                 >0      transact2 with that much data missing
 219                 -EINVAL = invalid transact2
 220
 221  */
 222 static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
 223 {
 224         struct smb_t2_rsp *pSMBt;
 225         int total_data_size;
 226         int data_in_this_rsp;
 227         int remaining;
 228
 229         if (pSMB->Command != SMB_COM_TRANSACTION2)
 230                 return 0;
 231
 232         /* check for plausible wct, bcc and t2 data and parm sizes */
 233         /* check for parm and data offset going beyond end of smb */
 234         if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
 235                 cFYI(1, ("invalid transact2 word count"));
 236                 return -EINVAL;
 237         }
 238
 239         pSMBt = (struct smb_t2_rsp *)pSMB;
 240
 241         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 242         data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 243
 244         remaining = total_data_size - data_in_this_rsp;
 245
 246         if (remaining == 0)
 247                 return 0;
 248         else if (remaining < 0) {
 249                 cFYI(1, ("total data %d smaller than data in frame %d",
 250                         total_data_size, data_in_this_rsp));
 251                 return -EINVAL;
 252         } else {
 253                 cFYI(1, ("missing %d bytes from transact2, check next response",
 254                         remaining));
 255                 if (total_data_size > maxBufSize) {
 256                         cERROR(1, ("TotalDataSize %d is over maximum buffer %d",
 257                                 total_data_size, maxBufSize));
 258                         return -EINVAL;
 259                 }
 260                 return remaining;
 261         }
 262 }
 263
 264 static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
 265 {
 266         struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
 267         struct smb_t2_rsp *pSMBt  = (struct smb_t2_rsp *)pTargetSMB;
 268         int total_data_size;
 269         int total_in_buf;
 270         int remaining;
 271         int total_in_buf2;
 272         char *data_area_of_target;
 273         char *data_area_of_buf2;
 274         __u16 byte_count;
 275
 276         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 277
 278         if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
 279                 cFYI(1, ("total data size of primary and secondary t2 differ"));
 280         }
 281
 282         total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 283
 284         remaining = total_data_size - total_in_buf;
 285
 286         if (remaining < 0)
 287                 return -EINVAL;
 288
 289         if (remaining == 0) /* nothing to do, ignore */
 290                 return 0;
 291
 292         total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
 293         if (remaining < total_in_buf2) {
 294                 cFYI(1, ("transact2 2nd response contains too much data"));
 295         }
 296
 297         /* find end of first SMB data area */
 298         data_area_of_target = (char *)&pSMBt->hdr.Protocol +
 299                                 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
 300         /* validate target area */
 301
 302         data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
 303                                         le16_to_cpu(pSMB2->t2_rsp.DataOffset);
 304
 305         data_area_of_target += total_in_buf;
 306
 307         /* copy second buffer into end of first buffer */
 308         memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2);
 309         total_in_buf += total_in_buf2;
 310         pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
 311         byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
 312         byte_count += total_in_buf2;
 313         BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
 314
 315         byte_count = pTargetSMB->smb_buf_length;
 316         byte_count += total_in_buf2;
 317
 318         /* BB also add check that we are not beyond maximum buffer size */
 319
 320         pTargetSMB->smb_buf_length = byte_count;
 321
 322         if (remaining == total_in_buf2) {
 323                 cFYI(1, ("found the last secondary response"));
 324                 return 0; /* we are done */
 325         } else /* more responses to go */
 326                 return 1;
 327
 328 }
 329
 330 static int
 331 cifs_demultiplex_thread(struct TCP_Server_Info *server)
 332 {
 333         int length;
 334         unsigned int pdu_length, total_read;
 335         struct smb_hdr *smb_buffer = NULL;
 336         struct smb_hdr *bigbuf = NULL;
 337         struct smb_hdr *smallbuf = NULL;
 338         struct msghdr smb_msg;
 339         struct kvec iov;
 340         struct socket *csocket = server->ssocket;
 341         struct list_head *tmp;
 342         struct cifsSesInfo *ses;
 343         struct task_struct *task_to_wake = NULL;
 344         struct mid_q_entry *mid_entry;
 345         char temp;
 346         bool isLargeBuf = false;
 347         bool isMultiRsp;
 348         int reconnect;
 349
 350         current->flags |= PF_MEMALLOC;
 351         server->tsk = current;  /* save process info to wake at shutdown */
 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         server->tsk = NULL;
 655         /* check if we have blocked requests that need to free */
 656         /* Note that cifs_max_pending is normally 50, but
 657         can be set at module install time to as little as two */
 658         if (atomic_read(&server->inFlight) >= cifs_max_pending)
 659                 atomic_set(&server->inFlight, cifs_max_pending - 1);
 660         /* We do not want to set the max_pending too low or we
 661         could end up with the counter going negative */
 662         spin_unlock(&GlobalMid_Lock);
 663         /* Although there should not be any requests blocked on
 664         this queue it can not hurt to be paranoid and try to wake up requests
 665         that may haven been blocked when more than 50 at time were on the wire
 666         to the same server - they now will see the session is in exit state
 667         and get out of SendReceive.  */
 668         wake_up_all(&server->request_q);
 669         /* give those requests time to exit */
 670         msleep(125);
 671
 672         if (server->ssocket) {
 673                 sock_release(csocket);
 674                 server->ssocket = NULL;
 675         }
 676         /* buffer usuallly freed in free_mid - need to free it here on exit */
 677         cifs_buf_release(bigbuf);
 678         if (smallbuf) /* no sense logging a debug message if NULL */
 679                 cifs_small_buf_release(smallbuf);
 680
 681         read_lock(&GlobalSMBSeslock);
 682         if (list_empty(&server->pending_mid_q)) {
 683                 /* loop through server session structures attached to this and
 684                     mark them dead */
 685                 list_for_each(tmp, &GlobalSMBSessionList) {
 686                         ses =
 687                             list_entry(tmp, struct cifsSesInfo,
 688                                        cifsSessionList);
 689                         if (ses->server == server) {
 690                                 ses->status = CifsExiting;
 691                                 ses->server = NULL;
 692                         }
 693                 }
 694                 read_unlock(&GlobalSMBSeslock);
 695         } else {
 696                 /* although we can not zero the server struct pointer yet,
 697                 since there are active requests which may depnd on them,
 698                 mark the corresponding SMB sessions as exiting too */
 699                 list_for_each(tmp, &GlobalSMBSessionList) {
 700                         ses = list_entry(tmp, struct cifsSesInfo,
 701                                          cifsSessionList);
 702                         if (ses->server == server)
 703                                 ses->status = CifsExiting;
 704                 }
 705
 706                 spin_lock(&GlobalMid_Lock);
 707                 list_for_each(tmp, &server->pending_mid_q) {
 708                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 709                         if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
 710                                 cFYI(1, ("Clearing Mid 0x%x - waking up ",
 711                                          mid_entry->mid));
 712                                 task_to_wake = mid_entry->tsk;
 713                                 if (task_to_wake)
 714                                         wake_up_process(task_to_wake);
 715                         }
 716                 }
 717                 spin_unlock(&GlobalMid_Lock);
 718                 read_unlock(&GlobalSMBSeslock);
 719                 /* 1/8th of sec is more than enough time for them to exit */
 720                 msleep(125);
 721         }
 722
 723         if (!list_empty(&server->pending_mid_q)) {
 724                 /* mpx threads have not exited yet give them
 725                 at least the smb send timeout time for long ops */
 726                 /* due to delays on oplock break requests, we need
 727                 to wait at least 45 seconds before giving up
 728                 on a request getting a response and going ahead
 729                 and killing cifsd */
 730                 cFYI(1, ("Wait for exit from demultiplex thread"));
 731                 msleep(46000);
 732                 /* if threads still have not exited they are probably never
 733                 coming home not much else we can do but free the memory */
 734         }
 735
 736         write_lock(&GlobalSMBSeslock);
 737         atomic_dec(&tcpSesAllocCount);
 738         length = tcpSesAllocCount.counter;
 739
 740         /* last chance to mark ses pointers invalid
 741         if there are any pointing to this (e.g
 742         if a crazy root user tried to kill cifsd
 743         kernel thread explicitly this might happen) */
 744         list_for_each(tmp, &GlobalSMBSessionList) {
 745                 ses = list_entry(tmp, struct cifsSesInfo,
 746                                 cifsSessionList);
 747                 if (ses->server == server)
 748                         ses->server = NULL;
 749         }
 750         write_unlock(&GlobalSMBSeslock);
 751
 752         kfree(server->hostname);
 753         kfree(server);
 754         if (length  > 0)
 755                 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
 756                                 GFP_KERNEL);
 757
 758         return 0;
 759 }
 760
 761 /* extract the host portion of the UNC string */
 762 static char *
 763 extract_hostname(const char *unc)
 764 {
 765         const char *src;
 766         char *dst, *delim;
 767         unsigned int len;
 768
 769         /* skip double chars at beginning of string */
 770         /* BB: check validity of these bytes? */
 771         src = unc + 2;
 772
 773         /* delimiter between hostname and sharename is always '\\' now */
 774         delim = strchr(src, '\\');
 775         if (!delim)
 776                 return ERR_PTR(-EINVAL);
 777
 778         len = delim - src;
 779         dst = kmalloc((len + 1), GFP_KERNEL);
 780         if (dst == NULL)
 781                 return ERR_PTR(-ENOMEM);
 782
 783         memcpy(dst, src, len);
 784         dst[len] = '\0';
 785
 786         return dst;
 787 }
 788
 789 static int
 790 cifs_parse_mount_options(char *options, const char *devname,
 791                          struct smb_vol *vol)
 792 {
 793         char *value;
 794         char *data;
 795         unsigned int  temp_len, i, j;
 796         char separator[2];
 797
 798         separator[0] = ',';
 799         separator[1] = 0;
 800
 801         if (Local_System_Name[0] != 0)
 802                 memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
 803         else {
 804                 char *nodename = utsname()->nodename;
 805                 int n = strnlen(nodename, 15);
 806                 memset(vol->source_rfc1001_name, 0x20, 15);
 807                 for (i = 0; i < n; i++) {
 808                         /* does not have to be perfect mapping since field is
 809                         informational, only used for servers that do not support
 810                         port 445 and it can be overridden at mount time */
 811                         vol->source_rfc1001_name[i] = toupper(nodename[i]);
 812                 }
 813         }
 814         vol->source_rfc1001_name[15] = 0;
 815         /* null target name indicates to use *SMBSERVR default called name
 816            if we end up sending RFC1001 session initialize */
 817         vol->target_rfc1001_name[0] = 0;
 818         vol->linux_uid = current->uid;  /* current->euid instead? */
 819         vol->linux_gid = current->gid;
 820         vol->dir_mode = S_IRWXUGO;
 821         /* 2767 perms indicate mandatory locking support */
 822         vol->file_mode = (S_IRWXUGO | S_ISGID) & (~S_IXGRP);
 823
 824         /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
 825         vol->rw = true;
 826         /* default is always to request posix paths. */
 827         vol->posix_paths = 1;
 828
 829         if (!options)
 830                 return 1;
 831
 832         if (strncmp(options, "sep=", 4) == 0) {
 833                 if (options[4] != 0) {
 834                         separator[0] = options[4];
 835                         options += 5;
 836                 } else {
 837                         cFYI(1, ("Null separator not allowed"));
 838                 }
 839         }
 840
 841         while ((data = strsep(&options, separator)) != NULL) {
 842                 if (!*data)
 843                         continue;
 844                 if ((value = strchr(data, '=')) != NULL)
 845                         *value++ = '\0';
 846
 847                 /* Have to parse this before we parse for "user" */
 848                 if (strnicmp(data, "user_xattr", 10) == 0) {
 849                         vol->no_xattr = 0;
 850                 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
 851                         vol->no_xattr = 1;
 852                 } else if (strnicmp(data, "user", 4) == 0) {
 853                         if (!value) {
 854                                 printk(KERN_WARNING
 855                                        "CIFS: invalid or missing username\n");
 856                                 return 1;       /* needs_arg; */
 857                         } else if (!*value) {
 858                                 /* null user, ie anonymous, authentication */
 859                                 vol->nullauth = 1;
 860                         }
 861                         if (strnlen(value, 200) < 200) {
 862                                 vol->username = value;
 863                         } else {
 864                                 printk(KERN_WARNING "CIFS: username too long\n");
 865                                 return 1;
 866                         }
 867                 } else if (strnicmp(data, "pass", 4) == 0) {
 868                         if (!value) {
 869                                 vol->password = NULL;
 870                                 continue;
 871                         } else if (value[0] == 0) {
 872                                 /* check if string begins with double comma
 873                                    since that would mean the password really
 874                                    does start with a comma, and would not
 875                                    indicate an empty string */
 876                                 if (value[1] != separator[0]) {
 877                                         vol->password = NULL;
 878                                         continue;
 879                                 }
 880                         }
 881                         temp_len = strlen(value);
 882                         /* removed password length check, NTLM passwords
 883                                 can be arbitrarily long */
 884
 885                         /* if comma in password, the string will be
 886                         prematurely null terminated.  Commas in password are
 887                         specified across the cifs mount interface by a double
 888                         comma ie ,, and a comma used as in other cases ie ','
 889                         as a parameter delimiter/separator is single and due
 890                         to the strsep above is temporarily zeroed. */
 891
 892                         /* NB: password legally can have multiple commas and
 893                         the only illegal character in a password is null */
 894
 895                         if ((value[temp_len] == 0) &&
 896                             (value[temp_len+1] == separator[0])) {
 897                                 /* reinsert comma */
 898                                 value[temp_len] = separator[0];
 899                                 temp_len += 2;  /* move after second comma */
 900                                 while (value[temp_len] != 0)  {
 901                                         if (value[temp_len] == separator[0]) {
 902                                                 if (value[temp_len+1] ==
 903                                                      separator[0]) {
 904                                                 /* skip second comma */
 905                                                         temp_len++;
 906                                                 } else {
 907                                                 /* single comma indicating start
 908                                                          of next parm */
 909                                                         break;
 910                                                 }
 911                                         }
 912                                         temp_len++;
 913                                 }
 914                                 if (value[temp_len] == 0) {
 915                                         options = NULL;
 916                                 } else {
 917                                         value[temp_len] = 0;
 918                                         /* point option to start of next parm */
 919                                         options = value + temp_len + 1;
 920                                 }
 921                                 /* go from value to value + temp_len condensing
 922                                 double commas to singles. Note that this ends up
 923                                 allocating a few bytes too many, which is ok */
 924                                 vol->password = kzalloc(temp_len, GFP_KERNEL);
 925                                 if (vol->password == NULL) {
 926                                         printk(KERN_WARNING "CIFS: no memory "
 927                                                             "for password\n");
 928                                         return 1;
 929                                 }
 930                                 for (i = 0, j = 0; i < temp_len; i++, j++) {
 931                                         vol->password[j] = value[i];
 932                                         if (value[i] == separator[0]
 933                                                 && value[i+1] == separator[0]) {
 934                                                 /* skip second comma */
 935                                                 i++;
 936                                         }
 937                                 }
 938                                 vol->password[j] = 0;
 939                         } else {
 940                                 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
 941                                 if (vol->password == NULL) {
 942                                         printk(KERN_WARNING "CIFS: no memory "
 943                                                             "for password\n");
 944                                         return 1;
 945                                 }
 946                                 strcpy(vol->password, value);
 947                         }
 948                 } else if (strnicmp(data, "ip", 2) == 0) {
 949                         if (!value || !*value) {
 950                                 vol->UNCip = NULL;
 951                         } else if (strnlen(value, 35) < 35) {
 952                                 vol->UNCip = value;
 953                         } else {
 954                                 printk(KERN_WARNING "CIFS: ip address "
 955                                                     "too long\n");
 956                                 return 1;
 957                         }
 958                 } else if (strnicmp(data, "sec", 3) == 0) {
 959                         if (!value || !*value) {
 960                                 cERROR(1, ("no security value specified"));
 961                                 continue;
 962                         } else if (strnicmp(value, "krb5i", 5) == 0) {
 963                                 vol->secFlg |= CIFSSEC_MAY_KRB5 |
 964                                         CIFSSEC_MUST_SIGN;
 965                         } else if (strnicmp(value, "krb5p", 5) == 0) {
 966                                 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
 967                                         CIFSSEC_MAY_KRB5; */
 968                                 cERROR(1, ("Krb5 cifs privacy not supported"));
 969                                 return 1;
 970                         } else if (strnicmp(value, "krb5", 4) == 0) {
 971                                 vol->secFlg |= CIFSSEC_MAY_KRB5;
 972                         } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
 973                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
 974                                         CIFSSEC_MUST_SIGN;
 975                         } else if (strnicmp(value, "ntlmv2", 6) == 0) {
 976                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
 977                         } else if (strnicmp(value, "ntlmi", 5) == 0) {
 978                                 vol->secFlg |= CIFSSEC_MAY_NTLM |
 979                                         CIFSSEC_MUST_SIGN;
 980                         } else if (strnicmp(value, "ntlm", 4) == 0) {
 981                                 /* ntlm is default so can be turned off too */
 982                                 vol->secFlg |= CIFSSEC_MAY_NTLM;
 983                         } else if (strnicmp(value, "nontlm", 6) == 0) {
 984                                 /* BB is there a better way to do this? */
 985                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
 986 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 987                         } else if (strnicmp(value, "lanman", 6) == 0) {
 988                                 vol->secFlg |= CIFSSEC_MAY_LANMAN;
 989 #endif
 990                         } else if (strnicmp(value, "none", 4) == 0) {
 991                                 vol->nullauth = 1;
 992                         } else {
 993                                 cERROR(1, ("bad security option: %s", value));
 994                                 return 1;
 995                         }
 996                 } else if ((strnicmp(data, "unc", 3) == 0)
 997                            || (strnicmp(data, "target", 6) == 0)
 998                            || (strnicmp(data, "path", 4) == 0)) {
 999                         if (!value || !*value) {
1000                                 printk(KERN_WARNING "CIFS: invalid path to "
1001                                                     "network resource\n");
1002                                 return 1;       /* needs_arg; */
1003                         }
1004                         if ((temp_len = strnlen(value, 300)) < 300) {
1005                                 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1006                                 if (vol->UNC == NULL)
1007                                         return 1;
1008                                 strcpy(vol->UNC, value);
1009                                 if (strncmp(vol->UNC, "//", 2) == 0) {
1010                                         vol->UNC[0] = '\\';
1011                                         vol->UNC[1] = '\\';
1012                                 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1013                                         printk(KERN_WARNING
1014                                                "CIFS: UNC Path does not begin "
1015                                                "with // or \\\\ \n");
1016                                         return 1;
1017                                 }
1018                         } else {
1019                                 printk(KERN_WARNING "CIFS: UNC name too long\n");
1020                                 return 1;
1021                         }
1022                 } else if ((strnicmp(data, "domain", 3) == 0)
1023                            || (strnicmp(data, "workgroup", 5) == 0)) {
1024                         if (!value || !*value) {
1025                                 printk(KERN_WARNING "CIFS: invalid domain name\n");
1026                                 return 1;       /* needs_arg; */
1027                         }
1028                         /* BB are there cases in which a comma can be valid in
1029                         a domain name and need special handling? */
1030                         if (strnlen(value, 256) < 256) {
1031                                 vol->domainname = value;
1032                                 cFYI(1, ("Domain name set"));
1033                         } else {
1034                                 printk(KERN_WARNING "CIFS: domain name too "
1035                                                     "long\n");
1036                                 return 1;
1037                         }
1038                 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1039                         if (!value || !*value) {
1040                                 printk(KERN_WARNING
1041                                         "CIFS: invalid path prefix\n");
1042                                 return 1;       /* needs_argument */
1043                         }
1044                         if ((temp_len = strnlen(value, 1024)) < 1024) {
1045                                 if (value[0] != '/')
1046                                         temp_len++;  /* missing leading slash */
1047                                 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1048                                 if (vol->prepath == NULL)
1049                                         return 1;
1050                                 if (value[0] != '/') {
1051                                         vol->prepath[0] = '/';
1052                                         strcpy(vol->prepath+1, value);
1053                                 } else
1054                                         strcpy(vol->prepath, value);
1055                                 cFYI(1, ("prefix path %s", vol->prepath));
1056                         } else {
1057                                 printk(KERN_WARNING "CIFS: prefix too long\n");
1058                                 return 1;
1059                         }
1060                 } else if (strnicmp(data, "iocharset", 9) == 0) {
1061                         if (!value || !*value) {
1062                                 printk(KERN_WARNING "CIFS: invalid iocharset "
1063                                                     "specified\n");
1064                                 return 1;       /* needs_arg; */
1065                         }
1066                         if (strnlen(value, 65) < 65) {
1067                                 if (strnicmp(value, "default", 7))
1068                                         vol->iocharset = value;
1069                                 /* if iocharset not set then load_nls_default
1070                                    is used by caller */
1071                                 cFYI(1, ("iocharset set to %s", value));
1072                         } else {
1073                                 printk(KERN_WARNING "CIFS: iocharset name "
1074                                                     "too long.\n");
1075                                 return 1;
1076                         }
1077                 } else if (strnicmp(data, "uid", 3) == 0) {
1078                         if (value && *value) {
1079                                 vol->linux_uid =
1080                                         simple_strtoul(value, &value, 0);
1081                                 vol->override_uid = 1;
1082                         }
1083                 } else if (strnicmp(data, "gid", 3) == 0) {
1084                         if (value && *value) {
1085                                 vol->linux_gid =
1086                                         simple_strtoul(value, &value, 0);
1087                                 vol->override_gid = 1;
1088                         }
1089                 } else if (strnicmp(data, "file_mode", 4) == 0) {
1090                         if (value && *value) {
1091                                 vol->file_mode =
1092                                         simple_strtoul(value, &value, 0);
1093                         }
1094                 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1095                         if (value && *value) {
1096                                 vol->dir_mode =
1097                                         simple_strtoul(value, &value, 0);
1098                         }
1099                 } else if (strnicmp(data, "dirmode", 4) == 0) {
1100                         if (value && *value) {
1101                                 vol->dir_mode =
1102                                         simple_strtoul(value, &value, 0);
1103                         }
1104                 } else if (strnicmp(data, "port", 4) == 0) {
1105                         if (value && *value) {
1106                                 vol->port =
1107                                         simple_strtoul(value, &value, 0);
1108                         }
1109                 } else if (strnicmp(data, "rsize", 5) == 0) {
1110                         if (value && *value) {
1111                                 vol->rsize =
1112                                         simple_strtoul(value, &value, 0);
1113                         }
1114                 } else if (strnicmp(data, "wsize", 5) == 0) {
1115                         if (value && *value) {
1116                                 vol->wsize =
1117                                         simple_strtoul(value, &value, 0);
1118                         }
1119                 } else if (strnicmp(data, "sockopt", 5) == 0) {
1120                         if (value && *value) {
1121                                 vol->sockopt =
1122                                         simple_strtoul(value, &value, 0);
1123                         }
1124                 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1125                         if (!value || !*value || (*value == ' ')) {
1126                                 cFYI(1, ("invalid (empty) netbiosname"));
1127                         } else {
1128                                 memset(vol->source_rfc1001_name, 0x20, 15);
1129                                 for (i = 0; i < 15; i++) {
1130                                 /* BB are there cases in which a comma can be
1131                                 valid in this workstation netbios name (and need
1132                                 special handling)? */
1133
1134                                 /* We do not uppercase netbiosname for user */
1135                                         if (value[i] == 0)
1136                                                 break;
1137                                         else
1138                                                 vol->source_rfc1001_name[i] =
1139                                                                 value[i];
1140                                 }
1141                                 /* The string has 16th byte zero still from
1142                                 set at top of the function  */
1143                                 if ((i == 15) && (value[i] != 0))
1144                                         printk(KERN_WARNING "CIFS: netbiosname"
1145                                                 " longer than 15 truncated.\n");
1146                         }
1147                 } else if (strnicmp(data, "servern", 7) == 0) {
1148                         /* servernetbiosname specified override *SMBSERVER */
1149                         if (!value || !*value || (*value == ' ')) {
1150                                 cFYI(1, ("empty server netbiosname specified"));
1151                         } else {
1152                                 /* last byte, type, is 0x20 for servr type */
1153                                 memset(vol->target_rfc1001_name, 0x20, 16);
1154
1155                                 for (i = 0; i < 15; i++) {
1156                                 /* BB are there cases in which a comma can be
1157                                    valid in this workstation netbios name
1158                                    (and need special handling)? */
1159
1160                                 /* user or mount helper must uppercase
1161                                    the netbiosname */
1162                                         if (value[i] == 0)
1163                                                 break;
1164                                         else
1165                                                 vol->target_rfc1001_name[i] =
1166                                                                 value[i];
1167                                 }
1168                                 /* The string has 16th byte zero still from
1169                                    set at top of the function  */
1170                                 if ((i == 15) && (value[i] != 0))
1171                                         printk(KERN_WARNING "CIFS: server net"
1172                                         "biosname longer than 15 truncated.\n");
1173                         }
1174                 } else if (strnicmp(data, "credentials", 4) == 0) {
1175                         /* ignore */
1176                 } else if (strnicmp(data, "version", 3) == 0) {
1177                         /* ignore */
1178                 } else if (strnicmp(data, "guest", 5) == 0) {
1179                         /* ignore */
1180                 } else if (strnicmp(data, "rw", 2) == 0) {
1181                         vol->rw = true;
1182                 } else if ((strnicmp(data, "suid", 4) == 0) ||
1183                                    (strnicmp(data, "nosuid", 6) == 0) ||
1184                                    (strnicmp(data, "exec", 4) == 0) ||
1185                                    (strnicmp(data, "noexec", 6) == 0) ||
1186                                    (strnicmp(data, "nodev", 5) == 0) ||
1187                                    (strnicmp(data, "noauto", 6) == 0) ||
1188                                    (strnicmp(data, "dev", 3) == 0)) {
1189                         /*  The mount tool or mount.cifs helper (if present)
1190                             uses these opts to set flags, and the flags are read
1191                             by the kernel vfs layer before we get here (ie
1192                             before read super) so there is no point trying to
1193                             parse these options again and set anything and it
1194                             is ok to just ignore them */
1195                         continue;
1196                 } else if (strnicmp(data, "ro", 2) == 0) {
1197                         vol->rw = false;
1198                 } else if (strnicmp(data, "hard", 4) == 0) {
1199                         vol->retry = 1;
1200                 } else if (strnicmp(data, "soft", 4) == 0) {
1201                         vol->retry = 0;
1202                 } else if (strnicmp(data, "perm", 4) == 0) {
1203                         vol->noperm = 0;
1204                 } else if (strnicmp(data, "noperm", 6) == 0) {
1205                         vol->noperm = 1;
1206                 } else if (strnicmp(data, "mapchars", 8) == 0) {
1207                         vol->remap = 1;
1208                 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1209                         vol->remap = 0;
1210                 } else if (strnicmp(data, "sfu", 3) == 0) {
1211                         vol->sfu_emul = 1;
1212                 } else if (strnicmp(data, "nosfu", 5) == 0) {
1213                         vol->sfu_emul = 0;
1214                 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1215                         vol->posix_paths = 1;
1216                 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1217                         vol->posix_paths = 0;
1218                 } else if (strnicmp(data, "nounix", 6) == 0) {
1219                         vol->no_linux_ext = 1;
1220                 } else if (strnicmp(data, "nolinux", 7) == 0) {
1221                         vol->no_linux_ext = 1;
1222                 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1223                            (strnicmp(data, "ignorecase", 10)  == 0)) {
1224                         vol->nocase = 1;
1225                 } else if (strnicmp(data, "brl", 3) == 0) {
1226                         vol->nobrl =  0;
1227                 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1228                            (strnicmp(data, "nolock", 6) == 0)) {
1229                         vol->nobrl =  1;
1230                         /* turn off mandatory locking in mode
1231                         if remote locking is turned off since the
1232                         local vfs will do advisory */
1233                         if (vol->file_mode ==
1234                                 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1235                                 vol->file_mode = S_IALLUGO;
1236                 } else if (strnicmp(data, "setuids", 7) == 0) {
1237                         vol->setuids = 1;
1238                 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1239                         vol->setuids = 0;
1240                 } else if (strnicmp(data, "nohard", 6) == 0) {
1241                         vol->retry = 0;
1242                 } else if (strnicmp(data, "nosoft", 6) == 0) {
1243                         vol->retry = 1;
1244                 } else if (strnicmp(data, "nointr", 6) == 0) {
1245                         vol->intr = 0;
1246                 } else if (strnicmp(data, "intr", 4) == 0) {
1247                         vol->intr = 1;
1248                 } else if (strnicmp(data, "serverino", 7) == 0) {
1249                         vol->server_ino = 1;
1250                 } else if (strnicmp(data, "noserverino", 9) == 0) {
1251                         vol->server_ino = 0;
1252                 } else if (strnicmp(data, "cifsacl", 7) == 0) {
1253                         vol->cifs_acl = 1;
1254                 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1255                         vol->cifs_acl = 0;
1256                 } else if (strnicmp(data, "acl", 3) == 0) {
1257                         vol->no_psx_acl = 0;
1258                 } else if (strnicmp(data, "noacl", 5) == 0) {
1259                         vol->no_psx_acl = 1;
1260                 } else if (strnicmp(data, "sign", 4) == 0) {
1261                         vol->secFlg |= CIFSSEC_MUST_SIGN;
1262 /*              } else if (strnicmp(data, "seal",4) == 0) {
1263                         vol->secFlg |= CIFSSEC_MUST_SEAL; */
1264                 } else if (strnicmp(data, "direct", 6) == 0) {
1265                         vol->direct_io = 1;
1266                 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
1267                         vol->direct_io = 1;
1268                 } else if (strnicmp(data, "in6_addr", 8) == 0) {
1269                         if (!value || !*value) {
1270                                 vol->in6_addr = NULL;
1271                         } else if (strnlen(value, 49) == 48) {
1272                                 vol->in6_addr = value;
1273                         } else {
1274                                 printk(KERN_WARNING "CIFS: ip v6 address not "
1275                                                     "48 characters long\n");
1276                                 return 1;
1277                         }
1278                 } else if (strnicmp(data, "noac", 4) == 0) {
1279                         printk(KERN_WARNING "CIFS: Mount option noac not "
1280                                 "supported. Instead set "
1281                                 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1282                 } else
1283                         printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1284                                                 data);
1285         }
1286         if (vol->UNC == NULL) {
1287                 if (devname == NULL) {
1288                         printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1289                                                 "target\n");
1290                         return 1;
1291                 }
1292                 if ((temp_len = strnlen(devname, 300)) < 300) {
1293                         vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1294                         if (vol->UNC == NULL)
1295                                 return 1;
1296                         strcpy(vol->UNC, devname);
1297                         if (strncmp(vol->UNC, "//", 2) == 0) {
1298                                 vol->UNC[0] = '\\';
1299                                 vol->UNC[1] = '\\';
1300                         } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1301                                 printk(KERN_WARNING "CIFS: UNC Path does not "
1302                                                     "begin with // or \\\\ \n");
1303                                 return 1;
1304                         }
1305                 } else {
1306                         printk(KERN_WARNING "CIFS: UNC name too long\n");
1307                         return 1;
1308                 }
1309         }
1310         if (vol->UNCip == NULL)
1311                 vol->UNCip = &vol->UNC[2];
1312
1313         return 0;
1314 }
1315
1316 static struct cifsSesInfo *
1317 cifs_find_tcp_session(struct in_addr *target_ip_addr,
1318                 struct in6_addr *target_ip6_addr,
1319                  char *userName, struct TCP_Server_Info **psrvTcp)
1320 {
1321         struct list_head *tmp;
1322         struct cifsSesInfo *ses;
1323         *psrvTcp = NULL;
1324         read_lock(&GlobalSMBSeslock);
1325
1326         list_for_each(tmp, &GlobalSMBSessionList) {
1327                 ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
1328                 if (ses->server) {
1329                         if ((target_ip_addr &&
1330                                 (ses->server->addr.sockAddr.sin_addr.s_addr
1331                                   == target_ip_addr->s_addr)) || (target_ip6_addr
1332                                 && memcmp(&ses->server->addr.sockAddr6.sin6_addr,
1333                                         target_ip6_addr, sizeof(*target_ip6_addr)))) {
1334                                 /* BB lock server and tcp session and increment
1335                                       use count here?? */
1336
1337                                 /* found a match on the TCP session */
1338                                 *psrvTcp = ses->server;
1339
1340                                 /* BB check if reconnection needed */
1341                                 if (strncmp
1342                                     (ses->userName, userName,
1343                                      MAX_USERNAME_SIZE) == 0){
1344                                         read_unlock(&GlobalSMBSeslock);
1345                                         /* Found exact match on both TCP and
1346                                            SMB sessions */
1347                                         return ses;
1348                                 }
1349                         }
1350                 }
1351                 /* else tcp and smb sessions need reconnection */
1352         }
1353         read_unlock(&GlobalSMBSeslock);
1354         return NULL;
1355 }
1356
1357 static struct cifsTconInfo *
1358 find_unc(__be32 new_target_ip_addr, char *uncName, char *userName)
1359 {
1360         struct list_head *tmp;
1361         struct cifsTconInfo *tcon;
1362         __be32 old_ip;
1363
1364         read_lock(&GlobalSMBSeslock);
1365
1366         list_for_each(tmp, &GlobalTreeConnectionList) {
1367                 cFYI(1, ("Next tcon"));
1368                 tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
1369                 if (!tcon->ses || !tcon->ses->server)
1370                         continue;
1371
1372                 old_ip = tcon->ses->server->addr.sockAddr.sin_addr.s_addr;
1373                 cFYI(1, ("old ip addr: %x == new ip %x ?",
1374                         old_ip, new_target_ip_addr));
1375
1376                 if (old_ip != new_target_ip_addr)
1377                         continue;
1378
1379                 /* BB lock tcon, server, tcp session and increment use count? */
1380                 /* found a match on the TCP session */
1381                 /* BB check if reconnection needed */
1382                 cFYI(1, ("IP match, old UNC: %s new: %s",
1383                         tcon->treeName, uncName));
1384
1385                 if (strncmp(tcon->treeName, uncName, MAX_TREE_SIZE))
1386                         continue;
1387
1388                 cFYI(1, ("and old usr: %s new: %s",
1389                         tcon->treeName, uncName));
1390
1391                 if (strncmp(tcon->ses->userName, userName, MAX_USERNAME_SIZE))
1392                         continue;
1393
1394                 /* matched smb session (user name) */
1395                 read_unlock(&GlobalSMBSeslock);
1396                 return tcon;
1397         }
1398
1399         read_unlock(&GlobalSMBSeslock);
1400         return NULL;
1401 }
1402
1403 int
1404 connect_to_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1405                     const char *old_path, const struct nls_table *nls_codepage,
1406                     int remap)
1407 {
1408         struct dfs_info3_param *referrals = NULL;
1409         unsigned int num_referrals;
1410         int rc = 0;
1411
1412         rc = get_dfs_path(xid, pSesInfo, old_path, nls_codepage,
1413                         &num_referrals, &referrals, remap);
1414
1415         /* BB Add in code to: if valid refrl, if not ip address contact
1416                 the helper that resolves tcp names, mount to it, try to
1417                 tcon to it unmount it if fail */
1418
1419         kfree(referrals);
1420
1421         return rc;
1422 }
1423
1424 int
1425 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
1426              const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
1427              struct dfs_info3_param **preferrals, int remap)
1428 {
1429         char *temp_unc;
1430         int rc = 0;
1431         unsigned char *targetUNCs;
1432
1433         *pnum_referrals = 0;
1434         *preferrals = NULL;
1435
1436         if (pSesInfo->ipc_tid == 0) {
1437                 temp_unc = kmalloc(2 /* for slashes */ +
1438                         strnlen(pSesInfo->serverName,
1439                                 SERVER_NAME_LEN_WITH_NULL * 2)
1440                                  + 1 + 4 /* slash IPC$ */  + 2,
1441                                 GFP_KERNEL);
1442                 if (temp_unc == NULL)
1443                         return -ENOMEM;
1444                 temp_unc[0] = '\\';
1445                 temp_unc[1] = '\\';
1446                 strcpy(temp_unc + 2, pSesInfo->serverName);
1447                 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1448                 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1449                 cFYI(1,
1450                      ("CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid));
1451                 kfree(temp_unc);
1452         }
1453         if (rc == 0)
1454                 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, &targetUNCs,
1455                                      pnum_referrals, nls_codepage, remap);
1456         /* BB map targetUNCs to dfs_info3 structures, here or
1457                 in CIFSGetDFSRefer BB */
1458
1459         return rc;
1460 }
1461
1462 /* See RFC1001 section 14 on representation of Netbios names */
1463 static void rfc1002mangle(char *target, char *source, unsigned int length)
1464 {
1465         unsigned int i, j;
1466
1467         for (i = 0, j = 0; i < (length); i++) {
1468                 /* mask a nibble at a time and encode */
1469                 target[j] = 'A' + (0x0F & (source[i] >> 4));
1470                 target[j+1] = 'A' + (0x0F & source[i]);
1471                 j += 2;
1472         }
1473
1474 }
1475
1476
1477 static int
1478 ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
1479              char *netbios_name, char *target_name)
1480 {
1481         int rc = 0;
1482         int connected = 0;
1483         __be16 orig_port = 0;
1484
1485         if (*csocket == NULL) {
1486                 rc = sock_create_kern(PF_INET, SOCK_STREAM,
1487                                       IPPROTO_TCP, csocket);
1488                 if (rc < 0) {
1489                         cERROR(1, ("Error %d creating socket", rc));
1490                         *csocket = NULL;
1491                         return rc;
1492                 } else {
1493                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1494                         cFYI(1, ("Socket created"));
1495                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1496                 }
1497         }
1498
1499         psin_server->sin_family = AF_INET;
1500         if (psin_server->sin_port) { /* user overrode default port */
1501                 rc = (*csocket)->ops->connect(*csocket,
1502                                 (struct sockaddr *) psin_server,
1503                                 sizeof(struct sockaddr_in), 0);
1504                 if (rc >= 0)
1505                         connected = 1;
1506         }
1507
1508         if (!connected) {
1509                 /* save original port so we can retry user specified port
1510                         later if fall back ports fail this time  */
1511                 orig_port = psin_server->sin_port;
1512
1513                 /* do not retry on the same port we just failed on */
1514                 if (psin_server->sin_port != htons(CIFS_PORT)) {
1515                         psin_server->sin_port = htons(CIFS_PORT);
1516
1517                         rc = (*csocket)->ops->connect(*csocket,
1518                                         (struct sockaddr *) psin_server,
1519                                         sizeof(struct sockaddr_in), 0);
1520                         if (rc >= 0)
1521                                 connected = 1;
1522                 }
1523         }
1524         if (!connected) {
1525                 psin_server->sin_port = htons(RFC1001_PORT);
1526                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1527                                               psin_server,
1528                                               sizeof(struct sockaddr_in), 0);
1529                 if (rc >= 0)
1530                         connected = 1;
1531         }
1532
1533         /* give up here - unless we want to retry on different
1534                 protocol families some day */
1535         if (!connected) {
1536                 if (orig_port)
1537                         psin_server->sin_port = orig_port;
1538                 cFYI(1, ("Error %d connecting to server via ipv4", rc));
1539                 sock_release(*csocket);
1540                 *csocket = NULL;
1541                 return rc;
1542         }
1543         /* Eventually check for other socket options to change from
1544                 the default. sock_setsockopt not used because it expects
1545                 user space buffer */
1546          cFYI(1, ("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
1547                  (*csocket)->sk->sk_sndbuf,
1548                  (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
1549         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1550         /* make the bufsizes depend on wsize/rsize and max requests */
1551         if ((*csocket)->sk->sk_sndbuf < (200 * 1024))
1552                 (*csocket)->sk->sk_sndbuf = 200 * 1024;
1553         if ((*csocket)->sk->sk_rcvbuf < (140 * 1024))
1554                 (*csocket)->sk->sk_rcvbuf = 140 * 1024;
1555
1556         /* send RFC1001 sessinit */
1557         if (psin_server->sin_port == htons(RFC1001_PORT)) {
1558                 /* some servers require RFC1001 sessinit before sending
1559                 negprot - BB check reconnection in case where second
1560                 sessinit is sent but no second negprot */
1561                 struct rfc1002_session_packet *ses_init_buf;
1562                 struct smb_hdr *smb_buf;
1563                 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
1564                                        GFP_KERNEL);
1565                 if (ses_init_buf) {
1566                         ses_init_buf->trailer.session_req.called_len = 32;
1567                         if (target_name && (target_name[0] != 0)) {
1568                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1569                                         target_name, 16);
1570                         } else {
1571                                 rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
1572                                         DEFAULT_CIFS_CALLED_NAME, 16);
1573                         }
1574
1575                         ses_init_buf->trailer.session_req.calling_len = 32;
1576                         /* calling name ends in null (byte 16) from old smb
1577                         convention. */
1578                         if (netbios_name && (netbios_name[0] != 0)) {
1579                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1580                                         netbios_name, 16);
1581                         } else {
1582                                 rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
1583                                         "LINUX_CIFS_CLNT", 16);
1584                         }
1585                         ses_init_buf->trailer.session_req.scope1 = 0;
1586                         ses_init_buf->trailer.session_req.scope2 = 0;
1587                         smb_buf = (struct smb_hdr *)ses_init_buf;
1588                         /* sizeof RFC1002_SESSION_REQUEST with no scope */
1589                         smb_buf->smb_buf_length = 0x81000044;
1590                         rc = smb_send(*csocket, smb_buf, 0x44,
1591                                 (struct sockaddr *)psin_server);
1592                         kfree(ses_init_buf);
1593                         msleep(1); /* RFC1001 layer in at least one server
1594                                       requires very short break before negprot
1595                                       presumably because not expecting negprot
1596                                       to follow so fast.  This is a simple
1597                                       solution that works without
1598                                       complicating the code and causes no
1599                                       significant slowing down on mount
1600                                       for everyone else */
1601                 }
1602                 /* else the negprot may still work without this
1603                 even though malloc failed */
1604
1605         }
1606
1607         return rc;
1608 }
1609
1610 static int
1611 ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
1612 {
1613         int rc = 0;
1614         int connected = 0;
1615         __be16 orig_port = 0;
1616
1617         if (*csocket == NULL) {
1618                 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
1619                                       IPPROTO_TCP, csocket);
1620                 if (rc < 0) {
1621                         cERROR(1, ("Error %d creating ipv6 socket", rc));
1622                         *csocket = NULL;
1623                         return rc;
1624                 } else {
1625                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1626                          cFYI(1, ("ipv6 Socket created"));
1627                         (*csocket)->sk->sk_allocation = GFP_NOFS;
1628                 }
1629         }
1630
1631         psin_server->sin6_family = AF_INET6;
1632
1633         if (psin_server->sin6_port) { /* user overrode default port */
1634                 rc = (*csocket)->ops->connect(*csocket,
1635                                 (struct sockaddr *) psin_server,
1636                                 sizeof(struct sockaddr_in6), 0);
1637                 if (rc >= 0)
1638                         connected = 1;
1639         }
1640
1641         if (!connected) {
1642                 /* save original port so we can retry user specified port
1643                         later if fall back ports fail this time  */
1644
1645                 orig_port = psin_server->sin6_port;
1646                 /* do not retry on the same port we just failed on */
1647                 if (psin_server->sin6_port != htons(CIFS_PORT)) {
1648                         psin_server->sin6_port = htons(CIFS_PORT);
1649
1650                         rc = (*csocket)->ops->connect(*csocket,
1651                                         (struct sockaddr *) psin_server,
1652                                         sizeof(struct sockaddr_in6), 0);
1653                         if (rc >= 0)
1654                                 connected = 1;
1655                 }
1656         }
1657         if (!connected) {
1658                 psin_server->sin6_port = htons(RFC1001_PORT);
1659                 rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
1660                                  psin_server, sizeof(struct sockaddr_in6), 0);
1661                 if (rc >= 0)
1662                         connected = 1;
1663         }
1664
1665         /* give up here - unless we want to retry on different
1666                 protocol families some day */
1667         if (!connected) {
1668                 if (orig_port)
1669                         psin_server->sin6_port = orig_port;
1670                 cFYI(1, ("Error %d connecting to server via ipv6", rc));
1671                 sock_release(*csocket);
1672                 *csocket = NULL;
1673                 return rc;
1674         }
1675         /* Eventually check for other socket options to change from
1676                 the default. sock_setsockopt not used because it expects
1677                 user space buffer */
1678         (*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1679
1680         return rc;
1681 }
1682
1683 void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
1684                           struct super_block *sb, struct smb_vol *vol_info)
1685 {
1686         /* if we are reconnecting then should we check to see if
1687          * any requested capabilities changed locally e.g. via
1688          * remount but we can not do much about it here
1689          * if they have (even if we could detect it by the following)
1690          * Perhaps we could add a backpointer to array of sb from tcon
1691          * or if we change to make all sb to same share the same
1692          * sb as NFS - then we only have one backpointer to sb.
1693          * What if we wanted to mount the server share twice once with
1694          * and once without posixacls or posix paths? */
1695         __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1696
1697         if (vol_info && vol_info->no_linux_ext) {
1698                 tcon->fsUnixInfo.Capability = 0;
1699                 tcon->unix_ext = 0; /* Unix Extensions disabled */
1700                 cFYI(1, ("Linux protocol extensions disabled"));
1701                 return;
1702         } else if (vol_info)
1703                 tcon->unix_ext = 1; /* Unix Extensions supported */
1704
1705         if (tcon->unix_ext == 0) {
1706                 cFYI(1, ("Unix extensions disabled so not set on reconnect"));
1707                 return;
1708         }
1709
1710         if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
1711                 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1712
1713                 /* check for reconnect case in which we do not
1714                    want to change the mount behavior if we can avoid it */
1715                 if (vol_info == NULL) {
1716                         /* turn off POSIX ACL and PATHNAMES if not set
1717                            originally at mount time */
1718                         if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
1719                                 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1720                         if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
1721                                 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
1722                                         cERROR(1, ("POSIXPATH support change"));
1723                                 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1724                         } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
1725                                 cERROR(1, ("possible reconnect error"));
1726                                 cERROR(1,
1727                                         ("server disabled POSIX path support"));
1728                         }
1729                 }
1730
1731                 cap &= CIFS_UNIX_CAP_MASK;
1732                 if (vol_info && vol_info->no_psx_acl)
1733                         cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1734                 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
1735                         cFYI(1, ("negotiated posix acl support"));
1736                         if (sb)
1737                                 sb->s_flags |= MS_POSIXACL;
1738                 }
1739
1740                 if (vol_info && vol_info->posix_paths == 0)
1741                         cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1742                 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
1743                         cFYI(1, ("negotiate posix pathnames"));
1744                         if (sb)
1745                                 CIFS_SB(sb)->mnt_cifs_flags |=
1746                                         CIFS_MOUNT_POSIX_PATHS;
1747                 }
1748
1749                 /* We might be setting the path sep back to a different
1750                 form if we are reconnecting and the server switched its
1751                 posix path capability for this share */
1752                 if (sb && (CIFS_SB(sb)->prepathlen > 0))
1753                         CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
1754
1755                 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
1756                         if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
1757                                 CIFS_SB(sb)->rsize = 127 * 1024;
1758                                 cFYI(DBG2,
1759                                         ("larger reads not supported by srv"));
1760                         }
1761                 }
1762
1763
1764                 cFYI(1, ("Negotiate caps 0x%x", (int)cap));
1765 #ifdef CONFIG_CIFS_DEBUG2
1766                 if (cap & CIFS_UNIX_FCNTL_CAP)
1767                         cFYI(1, ("FCNTL cap"));
1768                 if (cap & CIFS_UNIX_EXTATTR_CAP)
1769                         cFYI(1, ("EXTATTR cap"));
1770                 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
1771                         cFYI(1, ("POSIX path cap"));
1772                 if (cap & CIFS_UNIX_XATTR_CAP)
1773                         cFYI(1, ("XATTR cap"));
1774                 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
1775                         cFYI(1, ("POSIX ACL cap"));
1776                 if (cap & CIFS_UNIX_LARGE_READ_CAP)
1777                         cFYI(1, ("very large read cap"));
1778                 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
1779                         cFYI(1, ("very large write cap"));
1780 #endif /* CIFS_DEBUG2 */
1781                 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
1782                         if (vol_info == NULL) {
1783                                 cFYI(1, ("resetting capabilities failed"));
1784                         } else
1785                                 cERROR(1, ("Negotiating Unix capabilities "
1786                                            "with the server failed.  Consider "
1787                                            "mounting with the Unix Extensions\n"
1788                                            "disabled, if problems are found, "
1789                                            "by specifying the nounix mount "
1790                                            "option."));
1791
1792                 }
1793         }
1794 }
1795
1796 static void
1797 convert_delimiter(char *path, char delim)
1798 {
1799         int i;
1800         char old_delim;
1801
1802         if (path == NULL)
1803                 return;
1804
1805         if (delim == '/')
1806                 old_delim = '\\';
1807         else
1808                 old_delim = '/';
1809
1810         for (i = 0; path[i] != '\0'; i++) {
1811                 if (path[i] == old_delim)
1812                         path[i] = delim;
1813         }
1814 }
1815
1816 int
1817 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
1818            char *mount_data, const char *devname)
1819 {
1820         int rc = 0;
1821         int xid;
1822         int address_type = AF_INET;
1823         struct socket *csocket = NULL;
1824         struct sockaddr_in sin_server;
1825         struct sockaddr_in6 sin_server6;
1826         struct smb_vol volume_info;
1827         struct cifsSesInfo *pSesInfo = NULL;
1828         struct cifsSesInfo *existingCifsSes = NULL;
1829         struct cifsTconInfo *tcon = NULL;
1830         struct TCP_Server_Info *srvTcp = NULL;
1831
1832         xid = GetXid();
1833
1834 /* cFYI(1, ("Entering cifs_mount. Xid: %d with: %s", xid, mount_data)); */
1835
1836         memset(&volume_info, 0, sizeof(struct smb_vol));
1837         if (cifs_parse_mount_options(mount_data, devname, &volume_info)) {
1838                 rc = -EINVAL;
1839                 goto out;
1840         }
1841
1842         if (volume_info.nullauth) {
1843                 cFYI(1, ("null user"));
1844                 volume_info.username = "";
1845         } else if (volume_info.username) {
1846                 /* BB fixme parse for domain name here */
1847                 cFYI(1, ("Username: %s", volume_info.username));
1848         } else {
1849                 cifserror("No username specified");
1850         /* In userspace mount helper we can get user name from alternate
1851            locations such as env variables and files on disk */
1852                 rc = -EINVAL;
1853                 goto out;
1854         }
1855
1856         if (volume_info.UNCip && volume_info.UNC) {
1857                 rc = cifs_inet_pton(AF_INET, volume_info.UNCip,
1858                                     &sin_server.sin_addr.s_addr);
1859
1860                 if (rc <= 0) {
1861                         /* not ipv4 address, try ipv6 */
1862                         rc = cifs_inet_pton(AF_INET6, volume_info.UNCip,
1863                                             &sin_server6.sin6_addr.in6_u);
1864                         if (rc > 0)
1865                                 address_type = AF_INET6;
1866                 } else {
1867                         address_type = AF_INET;
1868                 }
1869
1870                 if (rc <= 0) {
1871                         /* we failed translating address */
1872                         rc = -EINVAL;
1873                         goto out;
1874                 }
1875
1876                 cFYI(1, ("UNC: %s ip: %s", volume_info.UNC, volume_info.UNCip));
1877                 /* success */
1878                 rc = 0;
1879         } else if (volume_info.UNCip) {
1880                 /* BB using ip addr as server name to connect to the
1881                    DFS root below */
1882                 cERROR(1, ("Connecting to DFS root not implemented yet"));
1883                 rc = -EINVAL;
1884                 goto out;
1885         } else /* which servers DFS root would we conect to */ {
1886                 cERROR(1,
1887                        ("CIFS mount error: No UNC path (e.g. -o "
1888                         "unc=//192.168.1.100/public) specified"));
1889                 rc = -EINVAL;
1890                 goto out;
1891         }
1892
1893         /* this is needed for ASCII cp to Unicode converts */
1894         if (volume_info.iocharset == NULL) {
1895                 cifs_sb->local_nls = load_nls_default();
1896         /* load_nls_default can not return null */
1897         } else {
1898                 cifs_sb->local_nls = load_nls(volume_info.iocharset);
1899                 if (cifs_sb->local_nls == NULL) {
1900                         cERROR(1, ("CIFS mount error: iocharset %s not found",
1901                                  volume_info.iocharset));
1902                         rc = -ELIBACC;
1903                         goto out;
1904                 }
1905         }
1906
1907         if (address_type == AF_INET)
1908                 existingCifsSes = cifs_find_tcp_session(&sin_server.sin_addr,
1909                         NULL /* no ipv6 addr */,
1910                         volume_info.username, &srvTcp);
1911         else if (address_type == AF_INET6) {
1912                 cFYI(1, ("looking for ipv6 address"));
1913                 existingCifsSes = cifs_find_tcp_session(NULL /* no ipv4 addr */,
1914                         &sin_server6.sin6_addr,
1915                         volume_info.username, &srvTcp);
1916         } else {
1917                 rc = -EINVAL;
1918                 goto out;
1919         }
1920
1921         if (srvTcp) {
1922                 cFYI(1, ("Existing tcp session with server found"));
1923         } else {        /* create socket */
1924                 if (volume_info.port)
1925                         sin_server.sin_port = htons(volume_info.port);
1926                 else
1927                         sin_server.sin_port = 0;
1928                 if (address_type == AF_INET6) {
1929                         cFYI(1, ("attempting ipv6 connect"));
1930                         /* BB should we allow ipv6 on port 139? */
1931                         /* other OS never observed in Wild doing 139 with v6 */
1932                         rc = ipv6_connect(&sin_server6, &csocket);
1933                 } else
1934                         rc = ipv4_connect(&sin_server, &csocket,
1935                                   volume_info.source_rfc1001_name,
1936                                   volume_info.target_rfc1001_name);
1937                 if (rc < 0) {
1938                         cERROR(1, ("Error connecting to IPv4 socket. "
1939                                    "Aborting operation"));
1940                         if (csocket != NULL)
1941                                 sock_release(csocket);
1942                         goto out;
1943                 }
1944
1945                 srvTcp = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1946                 if (!srvTcp) {
1947                         rc = -ENOMEM;
1948                         sock_release(csocket);
1949                         goto out;
1950                 } else {
1951                         memcpy(&srvTcp->addr.sockAddr, &sin_server,
1952                                 sizeof(struct sockaddr_in));
1953                         atomic_set(&srvTcp->inFlight, 0);
1954                         /* BB Add code for ipv6 case too */
1955                         srvTcp->ssocket = csocket;
1956                         srvTcp->protocolType = IPV4;
1957                         srvTcp->hostname = extract_hostname(volume_info.UNC);
1958                         if (IS_ERR(srvTcp->hostname)) {
1959                                 rc = PTR_ERR(srvTcp->hostname);
1960                                 sock_release(csocket);
1961                                 goto out;
1962                         }
1963                         init_waitqueue_head(&srvTcp->response_q);
1964                         init_waitqueue_head(&srvTcp->request_q);
1965                         INIT_LIST_HEAD(&srvTcp->pending_mid_q);
1966                         /* at this point we are the only ones with the pointer
1967                         to the struct since the kernel thread not created yet
1968                         so no need to spinlock this init of tcpStatus */
1969                         srvTcp->tcpStatus = CifsNew;
1970                         init_MUTEX(&srvTcp->tcpSem);
1971                         srvTcp->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, srvTcp, "cifsd");
1972                         if (IS_ERR(srvTcp->tsk)) {
1973                                 rc = PTR_ERR(srvTcp->tsk);
1974                                 cERROR(1, ("error %d create cifsd thread", rc));
1975                                 srvTcp->tsk = NULL;
1976                                 sock_release(csocket);
1977                                 kfree(srvTcp->hostname);
1978                                 goto out;
1979                         }
1980                         rc = 0;
1981                         memcpy(srvTcp->workstation_RFC1001_name,
1982                                 volume_info.source_rfc1001_name, 16);
1983                         memcpy(srvTcp->server_RFC1001_name,
1984                                 volume_info.target_rfc1001_name, 16);
1985                         srvTcp->sequence_number = 0;
1986                 }
1987         }
1988
1989         if (existingCifsSes) {
1990                 pSesInfo = existingCifsSes;
1991                 cFYI(1, ("Existing smb sess found (status=%d)",
1992                         pSesInfo->status));
1993                 down(&pSesInfo->sesSem);
1994                 if (pSesInfo->status == CifsNeedReconnect) {
1995                         cFYI(1, ("Session needs reconnect"));
1996                         rc = cifs_setup_session(xid, pSesInfo,
1997                                                 cifs_sb->local_nls);
1998                 }
1999                 up(&pSesInfo->sesSem);
2000         } else if (!rc) {
2001                 cFYI(1, ("Existing smb sess not found"));
2002                 pSesInfo = sesInfoAlloc();
2003                 if (pSesInfo == NULL)
2004                         rc = -ENOMEM;
2005                 else {
2006                         pSesInfo->server = srvTcp;
2007                         sprintf(pSesInfo->serverName, "%u.%u.%u.%u",
2008                                 NIPQUAD(sin_server.sin_addr.s_addr));
2009                 }
2010
2011                 if (!rc) {
2012                         /* volume_info.password freed at unmount */
2013                         if (volume_info.password) {
2014                                 pSesInfo->password = volume_info.password;
2015                                 /* set to NULL to prevent freeing on exit */
2016                                 volume_info.password = NULL;
2017                         }
2018                         if (volume_info.username)
2019                                 strncpy(pSesInfo->userName,
2020                                         volume_info.username,
2021                                         MAX_USERNAME_SIZE);
2022                         if (volume_info.domainname) {
2023                                 int len = strlen(volume_info.domainname);
2024                                 pSesInfo->domainName =
2025                                         kmalloc(len + 1, GFP_KERNEL);
2026                                 if (pSesInfo->domainName)
2027                                         strcpy(pSesInfo->domainName,
2028                                                 volume_info.domainname);
2029                         }
2030                         pSesInfo->linux_uid = volume_info.linux_uid;
2031                         pSesInfo->overrideSecFlg = volume_info.secFlg;
2032                         down(&pSesInfo->sesSem);
2033                         /* BB FIXME need to pass vol->secFlgs BB */
2034                         rc = cifs_setup_session(xid, pSesInfo,
2035                                                 cifs_sb->local_nls);
2036                         up(&pSesInfo->sesSem);
2037                         if (!rc)
2038                                 atomic_inc(&srvTcp->socketUseCount);
2039                 }
2040         }
2041
2042         /* search for existing tcon to this server share */
2043         if (!rc) {
2044                 if (volume_info.rsize > CIFSMaxBufSize) {
2045                         cERROR(1, ("rsize %d too large, using MaxBufSize",
2046                                 volume_info.rsize));
2047                         cifs_sb->rsize = CIFSMaxBufSize;
2048                 } else if ((volume_info.rsize) &&
2049                                 (volume_info.rsize <= CIFSMaxBufSize))
2050                         cifs_sb->rsize = volume_info.rsize;
2051                 else /* default */
2052                         cifs_sb->rsize = CIFSMaxBufSize;
2053
2054                 if (volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
2055                         cERROR(1, ("wsize %d too large, using 4096 instead",
2056                                   volume_info.wsize));
2057                         cifs_sb->wsize = 4096;
2058                 } else if (volume_info.wsize)
2059                         cifs_sb->wsize = volume_info.wsize;
2060                 else
2061                         cifs_sb->wsize =
2062                                 min_t(const int, PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2063                                         127*1024);
2064                         /* old default of CIFSMaxBufSize was too small now
2065                            that SMB Write2 can send multiple pages in kvec.
2066                            RFC1001 does not describe what happens when frame
2067                            bigger than 128K is sent so use that as max in
2068                            conjunction with 52K kvec constraint on arch with 4K
2069                            page size  */
2070
2071                 if (cifs_sb->rsize < 2048) {
2072                         cifs_sb->rsize = 2048;
2073                         /* Windows ME may prefer this */
2074                         cFYI(1, ("readsize set to minimum: 2048"));
2075                 }
2076                 /* calculate prepath */
2077                 cifs_sb->prepath = volume_info.prepath;
2078                 if (cifs_sb->prepath) {
2079                         cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2080                         /* we can not convert the / to \ in the path
2081                         separators in the prefixpath yet because we do not
2082                         know (until reset_cifs_unix_caps is called later)
2083                         whether POSIX PATH CAP is available. We normalize
2084                         the / to \ after reset_cifs_unix_caps is called */
2085                         volume_info.prepath = NULL;
2086                 } else
2087                         cifs_sb->prepathlen = 0;
2088                 cifs_sb->mnt_uid = volume_info.linux_uid;
2089                 cifs_sb->mnt_gid = volume_info.linux_gid;
2090                 cifs_sb->mnt_file_mode = volume_info.file_mode;
2091                 cifs_sb->mnt_dir_mode = volume_info.dir_mode;
2092                 cFYI(1, ("file mode: 0x%x  dir mode: 0x%x",
2093                         cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode));
2094
2095                 if (volume_info.noperm)
2096                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2097                 if (volume_info.setuids)
2098                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2099                 if (volume_info.server_ino)
2100                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2101                 if (volume_info.remap)
2102                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2103                 if (volume_info.no_xattr)
2104                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2105                 if (volume_info.sfu_emul)
2106                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2107                 if (volume_info.nobrl)
2108                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2109                 if (volume_info.cifs_acl)
2110                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2111                 if (volume_info.override_uid)
2112                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2113                 if (volume_info.override_gid)
2114                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2115                 if (volume_info.direct_io) {
2116                         cFYI(1, ("mounting share using direct i/o"));
2117                         cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2118                 }
2119
2120                 tcon =
2121                     find_unc(sin_server.sin_addr.s_addr, volume_info.UNC,
2122                              volume_info.username);
2123                 if (tcon) {
2124                         cFYI(1, ("Found match on UNC path"));
2125                         /* we can have only one retry value for a connection
2126                            to a share so for resources mounted more than once
2127                            to the same server share the last value passed in
2128                            for the retry flag is used */
2129                         tcon->retry = volume_info.retry;
2130                         tcon->nocase = volume_info.nocase;
2131                 } else {
2132                         tcon = tconInfoAlloc();
2133                         if (tcon == NULL)
2134                                 rc = -ENOMEM;
2135                         else {
2136                                 /* check for null share name ie connecting to
2137                                  * dfs root */
2138
2139                                 /* BB check if this works for exactly length
2140                                  * three strings */
2141                                 if ((strchr(volume_info.UNC + 3, '\\') == NULL)
2142                                     && (strchr(volume_info.UNC + 3, '/') ==
2143                                         NULL)) {
2144                                         rc = connect_to_dfs_path(xid, pSesInfo,
2145                                                 "", cifs_sb->local_nls,
2146                                                 cifs_sb->mnt_cifs_flags &
2147                                                   CIFS_MOUNT_MAP_SPECIAL_CHR);
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                                 struct task_struct *tsk;
2187                                 /* If we could verify that kthread_stop would
2188                                    always wake up processes blocked in
2189                                    tcp in recv_mesg then we could remove the
2190                                    send_sig call */
2191                                 force_sig(SIGKILL, srvTcp->tsk);
2192                                 tsk = srvTcp->tsk;
2193                                 if (tsk)
2194                                         kthread_stop(tsk);
2195                         }
2196                 }
2197                  /* If find_unc succeeded then rc == 0 so we can not end */
2198                 if (tcon)  /* up accidently freeing someone elses tcon struct */
2199                         tconInfoFree(tcon);
2200                 if (existingCifsSes == NULL) {
2201                         if (pSesInfo) {
2202                                 if ((pSesInfo->server) &&
2203                                     (pSesInfo->status == CifsGood)) {
2204                                         int temp_rc;
2205                                         temp_rc = CIFSSMBLogoff(xid, pSesInfo);
2206                                         /* if the socketUseCount is now zero */
2207                                         if ((temp_rc == -ESHUTDOWN) &&
2208                                             (pSesInfo->server) &&
2209                                             (pSesInfo->server->tsk)) {
2210                                                 struct task_struct *tsk;
2211                                                 force_sig(SIGKILL,
2212                                                         pSesInfo->server->tsk);
2213                                                 tsk = pSesInfo->server->tsk;
2214                                                 if (tsk)
2215                                                         kthread_stop(tsk);
2216                                         }
2217                                 } else {
2218                                         cFYI(1, ("No session or bad tcon"));
2219                                         if ((pSesInfo->server) &&
2220                                             (pSesInfo->server->tsk)) {
2221                                                 struct task_struct *tsk;
2222                                                 force_sig(SIGKILL,
2223                                                         pSesInfo->server->tsk);
2224                                                 tsk = pSesInfo->server->tsk;
2225                                                 if (tsk)
2226                                                         kthread_stop(tsk);
2227                                         }
2228                                 }
2229                                 sesInfoFree(pSesInfo);
2230                                 /* pSesInfo = NULL; */
2231                         }
2232                 }
2233         } else {
2234                 atomic_inc(&tcon->useCount);
2235                 cifs_sb->tcon = tcon;
2236                 tcon->ses = pSesInfo;
2237
2238                 /* do not care if following two calls succeed - informational */
2239                 if (!tcon->ipc) {
2240                         CIFSSMBQFSDeviceInfo(xid, tcon);
2241                         CIFSSMBQFSAttributeInfo(xid, tcon);
2242                 }
2243
2244                 /* tell server which Unix caps we support */
2245                 if (tcon->ses->capabilities & CAP_UNIX)
2246                         /* reset of caps checks mount to see if unix extensions
2247                            disabled for just this mount */
2248                         reset_cifs_unix_caps(xid, tcon, sb, &volume_info);
2249                 else
2250                         tcon->unix_ext = 0; /* server does not support them */
2251
2252                 /* convert forward to back slashes in prepath here if needed */
2253                 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2254                         convert_delimiter(cifs_sb->prepath,
2255                                           CIFS_DIR_SEP(cifs_sb));
2256
2257                 if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2258                         cifs_sb->rsize = 1024 * 127;
2259                         cFYI(DBG2,
2260                                 ("no very large read support, rsize now 127K"));
2261                 }
2262                 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2263                         cifs_sb->wsize = min(cifs_sb->wsize,
2264                                              (tcon->ses->server->maxBuf -
2265                                               MAX_CIFS_HDR_SIZE));
2266                 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2267                         cifs_sb->rsize = min(cifs_sb->rsize,
2268                                              (tcon->ses->server->maxBuf -
2269                                               MAX_CIFS_HDR_SIZE));
2270         }
2271
2272         /* volume_info.password is freed above when existing session found
2273         (in which case it is not needed anymore) but when new sesion is created
2274         the password ptr is put in the new session structure (in which case the
2275         password will be freed at unmount time) */
2276 out:
2277         /* zero out password before freeing */
2278         if (volume_info.password != NULL) {
2279                 memset(volume_info.password, 0, strlen(volume_info.password));
2280                 kfree(volume_info.password);
2281         }
2282         kfree(volume_info.UNC);
2283         kfree(volume_info.prepath);
2284         FreeXid(xid);
2285         return rc;
2286 }
2287
2288 static int
2289 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2290               char session_key[CIFS_SESS_KEY_SIZE],
2291               const struct nls_table *nls_codepage)
2292 {
2293         struct smb_hdr *smb_buffer;
2294         struct smb_hdr *smb_buffer_response;
2295         SESSION_SETUP_ANDX *pSMB;
2296         SESSION_SETUP_ANDX *pSMBr;
2297         char *bcc_ptr;
2298         char *user;
2299         char *domain;
2300         int rc = 0;
2301         int remaining_words = 0;
2302         int bytes_returned = 0;
2303         int len;
2304         __u32 capabilities;
2305         __u16 count;
2306
2307         cFYI(1, ("In sesssetup"));
2308         if (ses == NULL)
2309                 return -EINVAL;
2310         user = ses->userName;
2311         domain = ses->domainName;
2312         smb_buffer = cifs_buf_get();
2313         if (smb_buffer == NULL) {
2314                 return -ENOMEM;
2315         }
2316         smb_buffer_response = smb_buffer;
2317         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2318
2319         /* send SMBsessionSetup here */
2320         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2321                         NULL /* no tCon exists yet */ , 13 /* wct */ );
2322
2323         smb_buffer->Mid = GetNextMid(ses->server);
2324         pSMB->req_no_secext.AndXCommand = 0xFF;
2325         pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2326         pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2327
2328         if (ses->server->secMode &
2329                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2330                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2331
2332         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2333                 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2334         if (ses->capabilities & CAP_UNICODE) {
2335                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2336                 capabilities |= CAP_UNICODE;
2337         }
2338         if (ses->capabilities & CAP_STATUS32) {
2339                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2340                 capabilities |= CAP_STATUS32;
2341         }
2342         if (ses->capabilities & CAP_DFS) {
2343                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2344                 capabilities |= CAP_DFS;
2345         }
2346         pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2347
2348         pSMB->req_no_secext.CaseInsensitivePasswordLength =
2349                 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2350
2351         pSMB->req_no_secext.CaseSensitivePasswordLength =
2352             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2353         bcc_ptr = pByteArea(smb_buffer);
2354         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2355         bcc_ptr += CIFS_SESS_KEY_SIZE;
2356         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2357         bcc_ptr += CIFS_SESS_KEY_SIZE;
2358
2359         if (ses->capabilities & CAP_UNICODE) {
2360                 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2361                         *bcc_ptr = 0;
2362                         bcc_ptr++;
2363                 }
2364                 if (user == NULL)
2365                         bytes_returned = 0; /* skip null user */
2366                 else
2367                         bytes_returned =
2368                                 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2369                                         nls_codepage);
2370                 /* convert number of 16 bit words to bytes */
2371                 bcc_ptr += 2 * bytes_returned;
2372                 bcc_ptr += 2;   /* trailing null */
2373                 if (domain == NULL)
2374                         bytes_returned =
2375                             cifs_strtoUCS((__le16 *) bcc_ptr,
2376                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2377                 else
2378                         bytes_returned =
2379                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2380                                           nls_codepage);
2381                 bcc_ptr += 2 * bytes_returned;
2382                 bcc_ptr += 2;
2383                 bytes_returned =
2384                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2385                                   32, nls_codepage);
2386                 bcc_ptr += 2 * bytes_returned;
2387                 bytes_returned =
2388                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release,
2389                                   32, nls_codepage);
2390                 bcc_ptr += 2 * bytes_returned;
2391                 bcc_ptr += 2;
2392                 bytes_returned =
2393                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2394                                   64, nls_codepage);
2395                 bcc_ptr += 2 * bytes_returned;
2396                 bcc_ptr += 2;
2397         } else {
2398                 if (user != NULL) {
2399                     strncpy(bcc_ptr, user, 200);
2400                     bcc_ptr += strnlen(user, 200);
2401                 }
2402                 *bcc_ptr = 0;
2403                 bcc_ptr++;
2404                 if (domain == NULL) {
2405                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2406                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2407                 } else {
2408                         strncpy(bcc_ptr, domain, 64);
2409                         bcc_ptr += strnlen(domain, 64);
2410                         *bcc_ptr = 0;
2411                         bcc_ptr++;
2412                 }
2413                 strcpy(bcc_ptr, "Linux version ");
2414                 bcc_ptr += strlen("Linux version ");
2415                 strcpy(bcc_ptr, utsname()->release);
2416                 bcc_ptr += strlen(utsname()->release) + 1;
2417                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2418                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2419         }
2420         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2421         smb_buffer->smb_buf_length += count;
2422         pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2423
2424         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2425                          &bytes_returned, CIFS_LONG_OP);
2426         if (rc) {
2427 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2428         } else if ((smb_buffer_response->WordCount == 3)
2429                    || (smb_buffer_response->WordCount == 4)) {
2430                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2431                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2432                 if (action & GUEST_LOGIN)
2433                         cFYI(1, (" Guest login")); /* BB mark SesInfo struct? */
2434                 ses->Suid = smb_buffer_response->Uid; /* UID left in wire format
2435                                                          (little endian) */
2436                 cFYI(1, ("UID = %d ", ses->Suid));
2437         /* response can have either 3 or 4 word count - Samba sends 3 */
2438                 bcc_ptr = pByteArea(smb_buffer_response);
2439                 if ((pSMBr->resp.hdr.WordCount == 3)
2440                     || ((pSMBr->resp.hdr.WordCount == 4)
2441                         && (blob_len < pSMBr->resp.ByteCount))) {
2442                         if (pSMBr->resp.hdr.WordCount == 4)
2443                                 bcc_ptr += blob_len;
2444
2445                         if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2446                                 if ((long) (bcc_ptr) % 2) {
2447                                         remaining_words =
2448                                             (BCC(smb_buffer_response) - 1) / 2;
2449                                         /* Unicode strings must be word
2450                                            aligned */
2451                                         bcc_ptr++;
2452                                 } else {
2453                                         remaining_words =
2454                                                 BCC(smb_buffer_response) / 2;
2455                                 }
2456                                 len =
2457                                     UniStrnlen((wchar_t *) bcc_ptr,
2458                                                remaining_words - 1);
2459 /* We look for obvious messed up bcc or strings in response so we do not go off
2460    the end since (at least) WIN2K and Windows XP have a major bug in not null
2461    terminating last Unicode string in response  */
2462                                 if (ses->serverOS)
2463                                         kfree(ses->serverOS);
2464                                 ses->serverOS = kzalloc(2 * (len + 1),
2465                                                         GFP_KERNEL);
2466                                 if (ses->serverOS == NULL)
2467                                         goto sesssetup_nomem;
2468                                 cifs_strfromUCS_le(ses->serverOS,
2469                                                    (__le16 *)bcc_ptr,
2470                                                    len, nls_codepage);
2471                                 bcc_ptr += 2 * (len + 1);
2472                                 remaining_words -= len + 1;
2473                                 ses->serverOS[2 * len] = 0;
2474                                 ses->serverOS[1 + (2 * len)] = 0;
2475                                 if (remaining_words > 0) {
2476                                         len = UniStrnlen((wchar_t *)bcc_ptr,
2477                                                          remaining_words-1);
2478                                         kfree(ses->serverNOS);
2479                                         ses->serverNOS = kzalloc(2 * (len + 1),
2480                                                                  GFP_KERNEL);
2481                                         if (ses->serverNOS == NULL)
2482                                                 goto sesssetup_nomem;
2483                                         cifs_strfromUCS_le(ses->serverNOS,
2484                                                            (__le16 *)bcc_ptr,
2485                                                            len, nls_codepage);
2486                                         bcc_ptr += 2 * (len + 1);
2487                                         ses->serverNOS[2 * len] = 0;
2488                                         ses->serverNOS[1 + (2 * len)] = 0;
2489                                         if (strncmp(ses->serverNOS,
2490                                                 "NT LAN Manager 4", 16) == 0) {
2491                                                 cFYI(1, ("NT4 server"));
2492                                                 ses->flags |= CIFS_SES_NT4;
2493                                         }
2494                                         remaining_words -= len + 1;
2495                                         if (remaining_words > 0) {
2496                                                 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2497                                 /* last string is not always null terminated
2498                                    (for e.g. for Windows XP & 2000) */
2499                                                 if (ses->serverDomain)
2500                                                         kfree(ses->serverDomain);
2501                                                 ses->serverDomain =
2502                                                     kzalloc(2*(len+1),
2503                                                             GFP_KERNEL);
2504                                                 if (ses->serverDomain == NULL)
2505                                                         goto sesssetup_nomem;
2506                                                 cifs_strfromUCS_le(ses->serverDomain,
2507                                                         (__le16 *)bcc_ptr,
2508                                                         len, nls_codepage);
2509                                                 bcc_ptr += 2 * (len + 1);
2510                                                 ses->serverDomain[2*len] = 0;
2511                                                 ses->serverDomain[1+(2*len)] = 0;
2512                                         } else { /* else no more room so create
2513                                                   dummy domain string */
2514                                                 if (ses->serverDomain)
2515                                                         kfree(ses->serverDomain);
2516                                                 ses->serverDomain =
2517                                                         kzalloc(2, GFP_KERNEL);
2518                                         }
2519                                 } else { /* no room so create dummy domain
2520                                             and NOS string */
2521
2522                                         /* if these kcallocs fail not much we
2523                                            can do, but better to not fail the
2524                                            sesssetup itself */
2525                                         kfree(ses->serverDomain);
2526                                         ses->serverDomain =
2527                                             kzalloc(2, GFP_KERNEL);
2528                                         kfree(ses->serverNOS);
2529                                         ses->serverNOS =
2530                                             kzalloc(2, GFP_KERNEL);
2531                                 }
2532                         } else {        /* ASCII */
2533                                 len = strnlen(bcc_ptr, 1024);
2534                                 if (((long) bcc_ptr + len) - (long)
2535                                     pByteArea(smb_buffer_response)
2536                                             <= BCC(smb_buffer_response)) {
2537                                         kfree(ses->serverOS);
2538                                         ses->serverOS = kzalloc(len + 1,
2539                                                                 GFP_KERNEL);
2540                                         if (ses->serverOS == NULL)
2541                                                 goto sesssetup_nomem;
2542                                         strncpy(ses->serverOS, bcc_ptr, len);
2543
2544                                         bcc_ptr += len;
2545                                         /* null terminate the string */
2546                                         bcc_ptr[0] = 0;
2547                                         bcc_ptr++;
2548
2549                                         len = strnlen(bcc_ptr, 1024);
2550                                         kfree(ses->serverNOS);
2551                                         ses->serverNOS = kzalloc(len + 1,
2552                                                                  GFP_KERNEL);
2553                                         if (ses->serverNOS == NULL)
2554                                                 goto sesssetup_nomem;
2555                                         strncpy(ses->serverNOS, bcc_ptr, len);
2556                                         bcc_ptr += len;
2557                                         bcc_ptr[0] = 0;
2558                                         bcc_ptr++;
2559
2560                                         len = strnlen(bcc_ptr, 1024);
2561                                         if (ses->serverDomain)
2562                                                 kfree(ses->serverDomain);
2563                                         ses->serverDomain = kzalloc(len + 1,
2564                                                                     GFP_KERNEL);
2565                                         if (ses->serverDomain == NULL)
2566                                                 goto sesssetup_nomem;
2567                                         strncpy(ses->serverDomain, bcc_ptr,
2568                                                 len);
2569                                         bcc_ptr += len;
2570                                         bcc_ptr[0] = 0;
2571                                         bcc_ptr++;
2572                                 } else
2573                                         cFYI(1,
2574                                              ("Variable field of length %d "
2575                                                 "extends beyond end of smb ",
2576                                               len));
2577                         }
2578                 } else {
2579                         cERROR(1,
2580                                (" Security Blob Length extends beyond "
2581                                 "end of SMB"));
2582                 }
2583         } else {
2584                 cERROR(1,
2585                        (" Invalid Word count %d: ",
2586                         smb_buffer_response->WordCount));
2587                 rc = -EIO;
2588         }
2589 sesssetup_nomem:        /* do not return an error on nomem for the info strings,
2590                            since that could make reconnection harder, and
2591                            reconnection might be needed to free memory */
2592         cifs_buf_release(smb_buffer);
2593
2594         return rc;
2595 }
2596
2597 static int
2598 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2599                               struct cifsSesInfo *ses, bool *pNTLMv2_flag,
2600                               const struct nls_table *nls_codepage)
2601 {
2602         struct smb_hdr *smb_buffer;
2603         struct smb_hdr *smb_buffer_response;
2604         SESSION_SETUP_ANDX *pSMB;
2605         SESSION_SETUP_ANDX *pSMBr;
2606         char *bcc_ptr;
2607         char *domain;
2608         int rc = 0;
2609         int remaining_words = 0;
2610         int bytes_returned = 0;
2611         int len;
2612         int SecurityBlobLength = sizeof(NEGOTIATE_MESSAGE);
2613         PNEGOTIATE_MESSAGE SecurityBlob;
2614         PCHALLENGE_MESSAGE SecurityBlob2;
2615         __u32 negotiate_flags, capabilities;
2616         __u16 count;
2617
2618         cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
2619         if (ses == NULL)
2620                 return -EINVAL;
2621         domain = ses->domainName;
2622         *pNTLMv2_flag = false;
2623         smb_buffer = cifs_buf_get();
2624         if (smb_buffer == NULL) {
2625                 return -ENOMEM;
2626         }
2627         smb_buffer_response = smb_buffer;
2628         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2629         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2630
2631         /* send SMBsessionSetup here */
2632         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2633                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2634
2635         smb_buffer->Mid = GetNextMid(ses->server);
2636         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2637         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2638
2639         pSMB->req.AndXCommand = 0xFF;
2640         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2641         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2642
2643         if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2644                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2645
2646         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2647             CAP_EXTENDED_SECURITY;
2648         if (ses->capabilities & CAP_UNICODE) {
2649                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2650                 capabilities |= CAP_UNICODE;
2651         }
2652         if (ses->capabilities & CAP_STATUS32) {
2653                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2654                 capabilities |= CAP_STATUS32;
2655         }
2656         if (ses->capabilities & CAP_DFS) {
2657                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2658                 capabilities |= CAP_DFS;
2659         }
2660         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2661
2662         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2663         SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2664         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2665         SecurityBlob->MessageType = NtLmNegotiate;
2666         negotiate_flags =
2667             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2668             NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
2669             NTLMSSP_NEGOTIATE_56 |
2670             /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2671         if (sign_CIFS_PDUs)
2672                 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2673 /*      if (ntlmv2_support)
2674                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;*/
2675         /* setup pointers to domain name and workstation name */
2676         bcc_ptr += SecurityBlobLength;
2677
2678         SecurityBlob->WorkstationName.Buffer = 0;
2679         SecurityBlob->WorkstationName.Length = 0;
2680         SecurityBlob->WorkstationName.MaximumLength = 0;
2681
2682         /* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
2683         along with username on auth request (ie the response to challenge) */
2684         SecurityBlob->DomainName.Buffer = 0;
2685         SecurityBlob->DomainName.Length = 0;
2686         SecurityBlob->DomainName.MaximumLength = 0;
2687         if (ses->capabilities & CAP_UNICODE) {
2688                 if ((long) bcc_ptr % 2) {
2689                         *bcc_ptr = 0;
2690                         bcc_ptr++;
2691                 }
2692
2693                 bytes_returned =
2694                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2695                                   32, nls_codepage);
2696                 bcc_ptr += 2 * bytes_returned;
2697                 bytes_returned =
2698                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
2699                                   nls_codepage);
2700                 bcc_ptr += 2 * bytes_returned;
2701                 bcc_ptr += 2;   /* null terminate Linux version */
2702                 bytes_returned =
2703                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2704                                   64, nls_codepage);
2705                 bcc_ptr += 2 * bytes_returned;
2706                 *(bcc_ptr + 1) = 0;
2707                 *(bcc_ptr + 2) = 0;
2708                 bcc_ptr += 2;   /* null terminate network opsys string */
2709                 *(bcc_ptr + 1) = 0;
2710                 *(bcc_ptr + 2) = 0;
2711                 bcc_ptr += 2;   /* null domain */
2712         } else {                /* ASCII */
2713                 strcpy(bcc_ptr, "Linux version ");
2714                 bcc_ptr += strlen("Linux version ");
2715                 strcpy(bcc_ptr, utsname()->release);
2716                 bcc_ptr += strlen(utsname()->release) + 1;
2717                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2718                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2719                 bcc_ptr++;      /* empty domain field */
2720                 *bcc_ptr = 0;
2721         }
2722         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2723         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2724         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2725         smb_buffer->smb_buf_length += count;
2726         pSMB->req.ByteCount = cpu_to_le16(count);
2727
2728         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2729                          &bytes_returned, CIFS_LONG_OP);
2730
2731         if (smb_buffer_response->Status.CifsError ==
2732             cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
2733                 rc = 0;
2734
2735         if (rc) {
2736 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2737         } else if ((smb_buffer_response->WordCount == 3)
2738                    || (smb_buffer_response->WordCount == 4)) {
2739                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2740                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2741
2742                 if (action & GUEST_LOGIN)
2743                         cFYI(1, (" Guest login"));
2744         /* Do we want to set anything in SesInfo struct when guest login? */
2745
2746                 bcc_ptr = pByteArea(smb_buffer_response);
2747         /* response can have either 3 or 4 word count - Samba sends 3 */
2748
2749                 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
2750                 if (SecurityBlob2->MessageType != NtLmChallenge) {
2751                         cFYI(1,
2752                              ("Unexpected NTLMSSP message type received %d",
2753                               SecurityBlob2->MessageType));
2754                 } else if (ses) {
2755                         ses->Suid = smb_buffer_response->Uid; /* UID left in le format */
2756                         cFYI(1, ("UID = %d", ses->Suid));
2757                         if ((pSMBr->resp.hdr.WordCount == 3)
2758                             || ((pSMBr->resp.hdr.WordCount == 4)
2759                                 && (blob_len <
2760                                     pSMBr->resp.ByteCount))) {
2761
2762                                 if (pSMBr->resp.hdr.WordCount == 4) {
2763                                         bcc_ptr += blob_len;
2764                                         cFYI(1, ("Security Blob Length %d",
2765                                               blob_len));
2766                                 }
2767
2768                                 cFYI(1, ("NTLMSSP Challenge rcvd"));
2769
2770                                 memcpy(ses->server->cryptKey,
2771                                        SecurityBlob2->Challenge,
2772                                        CIFS_CRYPTO_KEY_SIZE);
2773                                 if (SecurityBlob2->NegotiateFlags &
2774                                         cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
2775                                         *pNTLMv2_flag = true;
2776
2777                                 if ((SecurityBlob2->NegotiateFlags &
2778                                         cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN))
2779                                         || (sign_CIFS_PDUs > 1))
2780                                                 ses->server->secMode |=
2781                                                         SECMODE_SIGN_REQUIRED;
2782                                 if ((SecurityBlob2->NegotiateFlags &
2783                                         cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
2784                                                 ses->server->secMode |=
2785                                                         SECMODE_SIGN_ENABLED;
2786
2787                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2788                                         if ((long) (bcc_ptr) % 2) {
2789                                                 remaining_words =
2790                                                     (BCC(smb_buffer_response)
2791                                                      - 1) / 2;
2792                                          /* Must word align unicode strings */
2793                                                 bcc_ptr++;
2794                                         } else {
2795                                                 remaining_words =
2796                                                     BCC
2797                                                     (smb_buffer_response) / 2;
2798                                         }
2799                                         len =
2800                                             UniStrnlen((wchar_t *) bcc_ptr,
2801                                                        remaining_words - 1);
2802 /* We look for obvious messed up bcc or strings in response so we do not go off
2803    the end since (at least) WIN2K and Windows XP have a major bug in not null
2804    terminating last Unicode string in response  */
2805                                         if (ses->serverOS)
2806                                                 kfree(ses->serverOS);
2807                                         ses->serverOS =
2808                                             kzalloc(2 * (len + 1), GFP_KERNEL);
2809                                         cifs_strfromUCS_le(ses->serverOS,
2810                                                            (__le16 *)
2811                                                            bcc_ptr, len,
2812                                                            nls_codepage);
2813                                         bcc_ptr += 2 * (len + 1);
2814                                         remaining_words -= len + 1;
2815                                         ses->serverOS[2 * len] = 0;
2816                                         ses->serverOS[1 + (2 * len)] = 0;
2817                                         if (remaining_words > 0) {
2818                                                 len = UniStrnlen((wchar_t *)
2819                                                                  bcc_ptr,
2820                                                                  remaining_words
2821                                                                  - 1);
2822                                                 kfree(ses->serverNOS);
2823                                                 ses->serverNOS =
2824                                                     kzalloc(2 * (len + 1),
2825                                                             GFP_KERNEL);
2826                                                 cifs_strfromUCS_le(ses->
2827                                                                    serverNOS,
2828                                                                    (__le16 *)
2829                                                                    bcc_ptr,
2830                                                                    len,
2831                                                                    nls_codepage);
2832                                                 bcc_ptr += 2 * (len + 1);
2833                                                 ses->serverNOS[2 * len] = 0;
2834                                                 ses->serverNOS[1 +
2835                                                                (2 * len)] = 0;
2836                                                 remaining_words -= len + 1;
2837                                                 if (remaining_words > 0) {
2838                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2839                                 /* last string not always null terminated
2840                                    (for e.g. for Windows XP & 2000) */
2841                                                         kfree(ses->serverDomain);
2842                                                         ses->serverDomain =
2843                                                             kzalloc(2 *
2844                                                                     (len +
2845                                                                      1),
2846                                                                     GFP_KERNEL);
2847                                                         cifs_strfromUCS_le
2848                                                             (ses->serverDomain,
2849                                                              (__le16 *)bcc_ptr,
2850                                                              len, nls_codepage);
2851                                                         bcc_ptr +=
2852                                                             2 * (len + 1);
2853                                                         ses->serverDomain[2*len]
2854                                                             = 0;
2855                                                         ses->serverDomain
2856                                                                 [1 + (2 * len)]
2857                                                             = 0;
2858                                                 } /* else no more room so create dummy domain string */
2859                                                 else {
2860                                                         kfree(ses->serverDomain);
2861                                                         ses->serverDomain =
2862                                                             kzalloc(2,
2863                                                                     GFP_KERNEL);
2864                                                 }
2865                                         } else {        /* no room so create dummy domain and NOS string */
2866                                                 kfree(ses->serverDomain);
2867                                                 ses->serverDomain =
2868                                                     kzalloc(2, GFP_KERNEL);
2869                                                 kfree(ses->serverNOS);
2870                                                 ses->serverNOS =
2871                                                     kzalloc(2, GFP_KERNEL);
2872                                         }
2873                                 } else {        /* ASCII */
2874                                         len = strnlen(bcc_ptr, 1024);
2875                                         if (((long) bcc_ptr + len) - (long)
2876                                             pByteArea(smb_buffer_response)
2877                                             <= BCC(smb_buffer_response)) {
2878                                                 if (ses->serverOS)
2879                                                         kfree(ses->serverOS);
2880                                                 ses->serverOS =
2881                                                     kzalloc(len + 1,
2882                                                             GFP_KERNEL);
2883                                                 strncpy(ses->serverOS,
2884                                                         bcc_ptr, len);
2885
2886                                                 bcc_ptr += len;
2887                                                 bcc_ptr[0] = 0; /* null terminate string */
2888                                                 bcc_ptr++;
2889
2890                                                 len = strnlen(bcc_ptr, 1024);
2891                                                 kfree(ses->serverNOS);
2892                                                 ses->serverNOS =
2893                                                     kzalloc(len + 1,
2894                                                             GFP_KERNEL);
2895                                                 strncpy(ses->serverNOS, bcc_ptr, len);
2896                                                 bcc_ptr += len;
2897                                                 bcc_ptr[0] = 0;
2898                                                 bcc_ptr++;
2899
2900                                                 len = strnlen(bcc_ptr, 1024);
2901                                                 kfree(ses->serverDomain);
2902                                                 ses->serverDomain =
2903                                                     kzalloc(len + 1,
2904                                                             GFP_KERNEL);
2905                                                 strncpy(ses->serverDomain,
2906                                                         bcc_ptr, len);
2907                                                 bcc_ptr += len;
2908                                                 bcc_ptr[0] = 0;
2909                                                 bcc_ptr++;
2910                                         } else
2911                                                 cFYI(1,
2912                                                      ("field of length %d "
2913                                                     "extends beyond end of smb",
2914                                                       len));
2915                                 }
2916                         } else {
2917                                 cERROR(1, ("Security Blob Length extends beyond"
2918                                            " end of SMB"));
2919                         }
2920                 } else {
2921                         cERROR(1, ("No session structure passed in."));
2922                 }
2923         } else {
2924                 cERROR(1,
2925                        (" Invalid Word count %d:",
2926                         smb_buffer_response->WordCount));
2927                 rc = -EIO;
2928         }
2929
2930         cifs_buf_release(smb_buffer);
2931
2932         return rc;
2933 }
2934 static int
2935 CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2936                         char *ntlm_session_key, bool ntlmv2_flag,
2937                         const struct nls_table *nls_codepage)
2938 {
2939         struct smb_hdr *smb_buffer;
2940         struct smb_hdr *smb_buffer_response;
2941         SESSION_SETUP_ANDX *pSMB;
2942         SESSION_SETUP_ANDX *pSMBr;
2943         char *bcc_ptr;
2944         char *user;
2945         char *domain;
2946         int rc = 0;
2947         int remaining_words = 0;
2948         int bytes_returned = 0;
2949         int len;
2950         int SecurityBlobLength = sizeof(AUTHENTICATE_MESSAGE);
2951         PAUTHENTICATE_MESSAGE SecurityBlob;
2952         __u32 negotiate_flags, capabilities;
2953         __u16 count;
2954
2955         cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
2956         if (ses == NULL)
2957                 return -EINVAL;
2958         user = ses->userName;
2959         domain = ses->domainName;
2960         smb_buffer = cifs_buf_get();
2961         if (smb_buffer == NULL) {
2962                 return -ENOMEM;
2963         }
2964         smb_buffer_response = smb_buffer;
2965         pSMB = (SESSION_SETUP_ANDX *)smb_buffer;
2966         pSMBr = (SESSION_SETUP_ANDX *)smb_buffer_response;
2967
2968         /* send SMBsessionSetup here */
2969         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2970                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2971
2972         smb_buffer->Mid = GetNextMid(ses->server);
2973         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2974         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2975         pSMB->req.AndXCommand = 0xFF;
2976         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2977         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2978
2979         pSMB->req.hdr.Uid = ses->Suid;
2980
2981         if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2982                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2983
2984         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2985                         CAP_EXTENDED_SECURITY;
2986         if (ses->capabilities & CAP_UNICODE) {
2987                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2988                 capabilities |= CAP_UNICODE;
2989         }
2990         if (ses->capabilities & CAP_STATUS32) {
2991                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2992                 capabilities |= CAP_STATUS32;
2993         }
2994         if (ses->capabilities & CAP_DFS) {
2995                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2996                 capabilities |= CAP_DFS;
2997         }
2998         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2999
3000         bcc_ptr = (char *)&pSMB->req.SecurityBlob;
3001         SecurityBlob = (PAUTHENTICATE_MESSAGE)bcc_ptr;
3002         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
3003         SecurityBlob->MessageType = NtLmAuthenticate;
3004         bcc_ptr += SecurityBlobLength;
3005         negotiate_flags = NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
3006                         NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
3007                         0x80000000 | NTLMSSP_NEGOTIATE_128;
3008         if (sign_CIFS_PDUs)
3009                 negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
3010         if (ntlmv2_flag)
3011                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
3012
3013 /* setup pointers to domain name and workstation name */
3014
3015         SecurityBlob->WorkstationName.Buffer = 0;
3016         SecurityBlob->WorkstationName.Length = 0;
3017         SecurityBlob->WorkstationName.MaximumLength = 0;
3018         SecurityBlob->SessionKey.Length = 0;
3019         SecurityBlob->SessionKey.MaximumLength = 0;
3020         SecurityBlob->SessionKey.Buffer = 0;
3021
3022         SecurityBlob->LmChallengeResponse.Length = 0;
3023         SecurityBlob->LmChallengeResponse.MaximumLength = 0;
3024         SecurityBlob->LmChallengeResponse.Buffer = 0;
3025
3026         SecurityBlob->NtChallengeResponse.Length =
3027             cpu_to_le16(CIFS_SESS_KEY_SIZE);
3028         SecurityBlob->NtChallengeResponse.MaximumLength =
3029             cpu_to_le16(CIFS_SESS_KEY_SIZE);
3030         memcpy(bcc_ptr, ntlm_session_key, CIFS_SESS_KEY_SIZE);
3031         SecurityBlob->NtChallengeResponse.Buffer =
3032             cpu_to_le32(SecurityBlobLength);
3033         SecurityBlobLength += CIFS_SESS_KEY_SIZE;
3034         bcc_ptr += CIFS_SESS_KEY_SIZE;
3035
3036         if (ses->capabilities & CAP_UNICODE) {
3037                 if (domain == NULL) {
3038                         SecurityBlob->DomainName.Buffer = 0;
3039                         SecurityBlob->DomainName.Length = 0;
3040                         SecurityBlob->DomainName.MaximumLength = 0;
3041                 } else {
3042                         __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
3043                                           nls_codepage);
3044                         ln *= 2;
3045                         SecurityBlob->DomainName.MaximumLength =
3046                             cpu_to_le16(ln);
3047                         SecurityBlob->DomainName.Buffer =
3048                             cpu_to_le32(SecurityBlobLength);
3049                         bcc_ptr += ln;
3050                         SecurityBlobLength += ln;
3051                         SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3052                 }
3053                 if (user == NULL) {
3054                         SecurityBlob->UserName.Buffer = 0;
3055                         SecurityBlob->UserName.Length = 0;
3056                         SecurityBlob->UserName.MaximumLength = 0;
3057                 } else {
3058                         __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
3059                                           nls_codepage);
3060                         ln *= 2;
3061                         SecurityBlob->UserName.MaximumLength =
3062                             cpu_to_le16(ln);
3063                         SecurityBlob->UserName.Buffer =
3064                             cpu_to_le32(SecurityBlobLength);
3065                         bcc_ptr += ln;
3066                         SecurityBlobLength += ln;
3067                         SecurityBlob->UserName.Length = cpu_to_le16(ln);
3068                 }
3069
3070                 /* SecurityBlob->WorkstationName.Length =
3071                  cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
3072                    SecurityBlob->WorkstationName.Length *= 2;
3073                    SecurityBlob->WorkstationName.MaximumLength =
3074                         cpu_to_le16(SecurityBlob->WorkstationName.Length);
3075                    SecurityBlob->WorkstationName.Buffer =
3076                                  cpu_to_le32(SecurityBlobLength);
3077                    bcc_ptr += SecurityBlob->WorkstationName.Length;
3078                    SecurityBlobLength += SecurityBlob->WorkstationName.Length;
3079                    SecurityBlob->WorkstationName.Length =
3080                         cpu_to_le16(SecurityBlob->WorkstationName.Length);  */
3081
3082                 if ((long) bcc_ptr % 2) {
3083                         *bcc_ptr = 0;
3084                         bcc_ptr++;
3085                 }
3086                 bytes_returned =
3087                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
3088                                   32, nls_codepage);
3089                 bcc_ptr += 2 * bytes_returned;
3090                 bytes_returned =
3091                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
3092                                   nls_codepage);
3093                 bcc_ptr += 2 * bytes_returned;
3094                 bcc_ptr += 2;   /* null term version string */
3095                 bytes_returned =
3096                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
3097                                   64, nls_codepage);
3098                 bcc_ptr += 2 * bytes_returned;
3099                 *(bcc_ptr + 1) = 0;
3100                 *(bcc_ptr + 2) = 0;
3101                 bcc_ptr += 2;   /* null terminate network opsys string */
3102                 *(bcc_ptr + 1) = 0;
3103                 *(bcc_ptr + 2) = 0;
3104                 bcc_ptr += 2;   /* null domain */
3105         } else {                /* ASCII */
3106                 if (domain == NULL) {
3107                         SecurityBlob->DomainName.Buffer = 0;
3108                         SecurityBlob->DomainName.Length = 0;
3109                         SecurityBlob->DomainName.MaximumLength = 0;
3110                 } else {
3111                         __u16 ln;
3112                         negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
3113                         strncpy(bcc_ptr, domain, 63);
3114                         ln = strnlen(domain, 64);
3115                         SecurityBlob->DomainName.MaximumLength =
3116                             cpu_to_le16(ln);
3117                         SecurityBlob->DomainName.Buffer =
3118                             cpu_to_le32(SecurityBlobLength);
3119                         bcc_ptr += ln;
3120                         SecurityBlobLength += ln;
3121                         SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3122                 }
3123                 if (user == NULL) {
3124                         SecurityBlob->UserName.Buffer = 0;
3125                         SecurityBlob->UserName.Length = 0;
3126                         SecurityBlob->UserName.MaximumLength = 0;
3127                 } else {
3128                         __u16 ln;
3129                         strncpy(bcc_ptr, user, 63);
3130                         ln = strnlen(user, 64);
3131                         SecurityBlob->UserName.MaximumLength = cpu_to_le16(ln);
3132                         SecurityBlob->UserName.Buffer =
3133                                                 cpu_to_le32(SecurityBlobLength);
3134                         bcc_ptr += ln;
3135                         SecurityBlobLength += ln;
3136                         SecurityBlob->UserName.Length = cpu_to_le16(ln);
3137                 }
3138                 /* BB fill in our workstation name if known BB */
3139
3140                 strcpy(bcc_ptr, "Linux version ");
3141                 bcc_ptr += strlen("Linux version ");
3142                 strcpy(bcc_ptr, utsname()->release);
3143                 bcc_ptr += strlen(utsname()->release) + 1;
3144                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
3145                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
3146                 bcc_ptr++;      /* null domain */
3147                 *bcc_ptr = 0;
3148         }
3149         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
3150         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
3151         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
3152         smb_buffer->smb_buf_length += count;
3153         pSMB->req.ByteCount = cpu_to_le16(count);
3154
3155         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
3156                          &bytes_returned, CIFS_LONG_OP);
3157         if (rc) {
3158 /*   rc = map_smb_to_linux_error(smb_buffer_response) done in SendReceive now */
3159         } else if ((smb_buffer_response->WordCount == 3) ||
3160                    (smb_buffer_response->WordCount == 4)) {
3161                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
3162                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
3163                 if (action & GUEST_LOGIN)
3164                         cFYI(1, (" Guest login")); /* BB Should we set anything
3165                                                          in SesInfo struct ? */
3166 /*              if (SecurityBlob2->MessageType != NtLm??) {
3167                         cFYI("Unexpected message type on auth response is %d"));
3168                 } */
3169
3170                 if (ses) {
3171                         cFYI(1,
3172                              ("Check challenge UID %d vs auth response UID %d",
3173                               ses->Suid, smb_buffer_response->Uid));
3174                         /* UID left in wire format */
3175                         ses->Suid = smb_buffer_response->Uid;
3176                         bcc_ptr = pByteArea(smb_buffer_response);
3177                 /* response can have either 3 or 4 word count - Samba sends 3 */
3178                         if ((pSMBr->resp.hdr.WordCount == 3)
3179                             || ((pSMBr->resp.hdr.WordCount == 4)
3180                                 && (blob_len <
3181                                     pSMBr->resp.ByteCount))) {
3182                                 if (pSMBr->resp.hdr.WordCount == 4) {
3183                                         bcc_ptr +=
3184                                             blob_len;
3185                                         cFYI(1,
3186                                              ("Security Blob Length %d ",
3187                                               blob_len));
3188                                 }
3189
3190                                 cFYI(1,
3191                                      ("NTLMSSP response to Authenticate "));
3192
3193                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3194                                         if ((long) (bcc_ptr) % 2) {
3195                                                 remaining_words =
3196                                                     (BCC(smb_buffer_response)
3197                                                      - 1) / 2;
3198                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
3199                                         } else {
3200                                                 remaining_words = BCC(smb_buffer_response) / 2;
3201                                         }
3202                                         len = UniStrnlen((wchar_t *) bcc_ptr,
3203                                                         remaining_words - 1);
3204 /* We look for obvious messed up bcc or strings in response so we do not go off
3205   the end since (at least) WIN2K and Windows XP have a major bug in not null
3206   terminating last Unicode string in response  */
3207                                         if (ses->serverOS)
3208                                                 kfree(ses->serverOS);
3209                                         ses->serverOS =
3210                                             kzalloc(2 * (len + 1), GFP_KERNEL);
3211                                         cifs_strfromUCS_le(ses->serverOS,
3212                                                            (__le16 *)
3213                                                            bcc_ptr, len,
3214                                                            nls_codepage);
3215                                         bcc_ptr += 2 * (len + 1);
3216                                         remaining_words -= len + 1;
3217                                         ses->serverOS[2 * len] = 0;
3218                                         ses->serverOS[1 + (2 * len)] = 0;
3219                                         if (remaining_words > 0) {
3220                                                 len = UniStrnlen((wchar_t *)
3221                                                                  bcc_ptr,
3222                                                                  remaining_words
3223                                                                  - 1);
3224                                                 kfree(ses->serverNOS);
3225                                                 ses->serverNOS =
3226                                                     kzalloc(2 * (len + 1),
3227                                                             GFP_KERNEL);
3228                                                 cifs_strfromUCS_le(ses->
3229                                                                    serverNOS,
3230                                                                    (__le16 *)
3231                                                                    bcc_ptr,
3232                                                                    len,
3233                                                                    nls_codepage);
3234                                                 bcc_ptr += 2 * (len + 1);
3235                                                 ses->serverNOS[2 * len] = 0;
3236                                                 ses->serverNOS[1+(2*len)] = 0;
3237                                                 remaining_words -= len + 1;
3238                                                 if (remaining_words > 0) {
3239                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3240      /* last string not always null terminated (e.g. for Windows XP & 2000) */
3241                                                         if (ses->serverDomain)
3242                                                                 kfree(ses->serverDomain);
3243                                                         ses->serverDomain =
3244                                                             kzalloc(2 *
3245                                                                     (len +
3246                                                                      1),
3247                                                                     GFP_KERNEL);
3248                                                         cifs_strfromUCS_le
3249                                                             (ses->
3250                                                              serverDomain,
3251                                                              (__le16 *)
3252                                                              bcc_ptr, len,
3253                                                              nls_codepage);
3254                                                         bcc_ptr +=
3255                                                             2 * (len + 1);
3256                                                         ses->
3257                                                             serverDomain[2
3258                                                                          * len]
3259                                                             = 0;
3260                                                         ses->
3261                                                             serverDomain[1
3262                                                                          +
3263                                                                          (2
3264                                                                           *
3265                                                                           len)]
3266                                                             = 0;
3267                                                 } /* else no more room so create dummy domain string */
3268                                                 else {
3269                                                         if (ses->serverDomain)
3270                                                                 kfree(ses->serverDomain);
3271                                                         ses->serverDomain = kzalloc(2,GFP_KERNEL);
3272                                                 }
3273                                         } else {  /* no room so create dummy domain and NOS string */
3274                                                 if (ses->serverDomain)
3275                                                         kfree(ses->serverDomain);
3276                                                 ses->serverDomain = kzalloc(2, GFP_KERNEL);
3277                                                 kfree(ses->serverNOS);
3278                                                 ses->serverNOS = kzalloc(2, GFP_KERNEL);
3279                                         }
3280                                 } else {        /* ASCII */
3281                                         len = strnlen(bcc_ptr, 1024);
3282                                         if (((long) bcc_ptr + len) -
3283                                            (long) pByteArea(smb_buffer_response)
3284                                                 <= BCC(smb_buffer_response)) {
3285                                                 if (ses->serverOS)
3286                                                         kfree(ses->serverOS);
3287                                                 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
3288                                                 strncpy(ses->serverOS,bcc_ptr, len);
3289
3290                                                 bcc_ptr += len;
3291                                                 bcc_ptr[0] = 0; /* null terminate the string */
3292                                                 bcc_ptr++;
3293
3294                                                 len = strnlen(bcc_ptr, 1024);
3295                                                 kfree(ses->serverNOS);
3296                                                 ses->serverNOS = kzalloc(len+1,
3297                                                                     GFP_KERNEL);
3298                                                 strncpy(ses->serverNOS,
3299                                                         bcc_ptr, len);
3300                                                 bcc_ptr += len;
3301                                                 bcc_ptr[0] = 0;
3302                                                 bcc_ptr++;
3303
3304                                                 len = strnlen(bcc_ptr, 1024);
3305                                                 if (ses->serverDomain)
3306                                                         kfree(ses->serverDomain);
3307                                                 ses->serverDomain =
3308                                                                 kzalloc(len+1,
3309                                                                     GFP_KERNEL);
3310                                                 strncpy(ses->serverDomain,
3311                                                         bcc_ptr, len);
3312                                                 bcc_ptr += len;
3313                                                 bcc_ptr[0] = 0;
3314                                                 bcc_ptr++;
3315                                         } else
3316                                                 cFYI(1, ("field of length %d "
3317                                                    "extends beyond end of smb ",
3318                                                       len));
3319                                 }
3320                         } else {
3321                                 cERROR(1, ("Security Blob extends beyond end "
3322                                         "of SMB"));
3323                         }
3324                 } else {
3325                         cERROR(1, ("No session structure passed in."));
3326                 }
3327         } else {
3328                 cERROR(1, ("Invalid Word count %d: ",
3329                         smb_buffer_response->WordCount));
3330                 rc = -EIO;
3331         }
3332
3333         cifs_buf_release(smb_buffer);
3334
3335         return rc;
3336 }
3337
3338 int
3339 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
3340          const char *tree, struct cifsTconInfo *tcon,
3341          const struct nls_table *nls_codepage)
3342 {
3343         struct smb_hdr *smb_buffer;
3344         struct smb_hdr *smb_buffer_response;
3345         TCONX_REQ *pSMB;
3346         TCONX_RSP *pSMBr;
3347         unsigned char *bcc_ptr;
3348         int rc = 0;
3349         int length;
3350         __u16 count;
3351
3352         if (ses == NULL)
3353                 return -EIO;
3354
3355         smb_buffer = cifs_buf_get();
3356         if (smb_buffer == NULL) {
3357                 return -ENOMEM;
3358         }
3359         smb_buffer_response = smb_buffer;
3360
3361         header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3362                         NULL /*no tid */ , 4 /*wct */ );
3363
3364         smb_buffer->Mid = GetNextMid(ses->server);
3365         smb_buffer->Uid = ses->Suid;
3366         pSMB = (TCONX_REQ *) smb_buffer;
3367         pSMBr = (TCONX_RSP *) smb_buffer_response;
3368
3369         pSMB->AndXCommand = 0xFF;
3370         pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3371         bcc_ptr = &pSMB->Password[0];
3372         if ((ses->server->secMode) & SECMODE_USER) {
3373                 pSMB->PasswordLength = cpu_to_le16(1);  /* minimum */
3374                 *bcc_ptr = 0; /* password is null byte */
3375                 bcc_ptr++;              /* skip password */
3376                 /* already aligned so no need to do it below */
3377         } else {
3378                 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
3379                 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3380                    specified as required (when that support is added to
3381                    the vfs in the future) as only NTLM or the much
3382                    weaker LANMAN (which we do not send by default) is accepted
3383                    by Samba (not sure whether other servers allow
3384                    NTLMv2 password here) */
3385 #ifdef CONFIG_CIFS_WEAK_PW_HASH
3386                 if ((extended_security & CIFSSEC_MAY_LANMAN) &&
3387                         (ses->server->secType == LANMAN))
3388                         calc_lanman_hash(ses, bcc_ptr);
3389                 else
3390 #endif /* CIFS_WEAK_PW_HASH */
3391                 SMBNTencrypt(ses->password,
3392                              ses->server->cryptKey,
3393                              bcc_ptr);
3394
3395                 bcc_ptr += CIFS_SESS_KEY_SIZE;
3396                 if (ses->capabilities & CAP_UNICODE) {
3397                         /* must align unicode strings */
3398                         *bcc_ptr = 0; /* null byte password */
3399                         bcc_ptr++;
3400                 }
3401         }
3402
3403         if (ses->server->secMode &
3404                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3405                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3406
3407         if (ses->capabilities & CAP_STATUS32) {
3408                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3409         }
3410         if (ses->capabilities & CAP_DFS) {
3411                 smb_buffer->Flags2 |= SMBFLG2_DFS;
3412         }
3413         if (ses->capabilities & CAP_UNICODE) {
3414                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3415                 length =
3416                     cifs_strtoUCS((__le16 *) bcc_ptr, tree,
3417                         6 /* max utf8 char length in bytes */ *
3418                         (/* server len*/ + 256 /* share len */), nls_codepage);
3419                 bcc_ptr += 2 * length;  /* convert num 16 bit words to bytes */
3420                 bcc_ptr += 2;   /* skip trailing null */
3421         } else {                /* ASCII */
3422                 strcpy(bcc_ptr, tree);
3423                 bcc_ptr += strlen(tree) + 1;
3424         }
3425         strcpy(bcc_ptr, "?????");
3426         bcc_ptr += strlen("?????");
3427         bcc_ptr += 1;
3428         count = bcc_ptr - &pSMB->Password[0];
3429         pSMB->hdr.smb_buf_length += count;
3430         pSMB->ByteCount = cpu_to_le16(count);
3431
3432         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
3433                          CIFS_STD_OP);
3434
3435         /* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
3436         /* above now done in SendReceive */
3437         if ((rc == 0) && (tcon != NULL)) {
3438                 tcon->tidStatus = CifsGood;
3439                 tcon->tid = smb_buffer_response->Tid;
3440                 bcc_ptr = pByteArea(smb_buffer_response);
3441                 length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
3442                 /* skip service field (NB: this field is always ASCII) */
3443                 if (length == 3) {
3444                         if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3445                             (bcc_ptr[2] == 'C')) {
3446                                 cFYI(1, ("IPC connection"));
3447                                 tcon->ipc = 1;
3448                         }
3449                 } else if (length == 2) {
3450                         if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3451                                 /* the most common case */
3452                                 cFYI(1, ("disk share connection"));
3453                         }
3454                 }
3455                 bcc_ptr += length + 1;
3456                 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3457                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3458                         length = UniStrnlen((wchar_t *) bcc_ptr, 512);
3459                         if ((bcc_ptr + (2 * length)) -
3460                              pByteArea(smb_buffer_response) <=
3461                             BCC(smb_buffer_response)) {
3462                                 kfree(tcon->nativeFileSystem);
3463                                 tcon->nativeFileSystem =
3464                                     kzalloc(length + 2, GFP_KERNEL);
3465                                 if (tcon->nativeFileSystem)
3466                                         cifs_strfromUCS_le(
3467                                                 tcon->nativeFileSystem,
3468                                                 (__le16 *) bcc_ptr,
3469                                                 length, nls_codepage);
3470                                 bcc_ptr += 2 * length;
3471                                 bcc_ptr[0] = 0; /* null terminate the string */
3472                                 bcc_ptr[1] = 0;
3473                                 bcc_ptr += 2;
3474                         }
3475                         /* else do not bother copying these information fields*/
3476                 } else {
3477                         length = strnlen(bcc_ptr, 1024);
3478                         if ((bcc_ptr + length) -
3479                             pByteArea(smb_buffer_response) <=
3480                             BCC(smb_buffer_response)) {
3481                                 kfree(tcon->nativeFileSystem);
3482                                 tcon->nativeFileSystem =
3483                                     kzalloc(length + 1, GFP_KERNEL);
3484                                 if (tcon->nativeFileSystem)
3485                                         strncpy(tcon->nativeFileSystem, bcc_ptr,
3486                                                 length);
3487                         }
3488                         /* else do not bother copying these information fields*/
3489                 }
3490                 if ((smb_buffer_response->WordCount == 3) ||
3491                          (smb_buffer_response->WordCount == 7))
3492                         /* field is in same location */
3493                         tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3494                 else
3495                         tcon->Flags = 0;
3496                 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
3497         } else if ((rc == 0) && tcon == NULL) {
3498                 /* all we need to save for IPC$ connection */
3499                 ses->ipc_tid = smb_buffer_response->Tid;
3500         }
3501
3502         cifs_buf_release(smb_buffer);
3503         return rc;
3504 }
3505
3506 int
3507 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3508 {
3509         int rc = 0;
3510         int xid;
3511         struct cifsSesInfo *ses = NULL;
3512         struct task_struct *cifsd_task;
3513         char *tmp;
3514
3515         xid = GetXid();
3516
3517         if (cifs_sb->tcon) {
3518                 ses = cifs_sb->tcon->ses; /* save ptr to ses before delete tcon!*/
3519                 rc = CIFSSMBTDis(xid, cifs_sb->tcon);
3520                 if (rc == -EBUSY) {
3521                         FreeXid(xid);
3522                         return 0;
3523                 }
3524                 DeleteTconOplockQEntries(cifs_sb->tcon);
3525                 tconInfoFree(cifs_sb->tcon);
3526                 if ((ses) && (ses->server)) {
3527                         /* save off task so we do not refer to ses later */
3528                         cifsd_task = ses->server->tsk;
3529                         cFYI(1, ("About to do SMBLogoff "));
3530                         rc = CIFSSMBLogoff(xid, ses);
3531                         if (rc == -EBUSY) {
3532                                 FreeXid(xid);
3533                                 return 0;
3534                         } else if (rc == -ESHUTDOWN) {
3535                                 cFYI(1, ("Waking up socket by sending signal"));
3536                                 if (cifsd_task) {
3537                                         force_sig(SIGKILL, cifsd_task);
3538                                         kthread_stop(cifsd_task);
3539                                 }
3540                                 rc = 0;
3541                         } /* else - we have an smb session
3542                                 left on this socket do not kill cifsd */
3543                 } else
3544                         cFYI(1, ("No session or bad tcon"));
3545         }
3546
3547         cifs_sb->tcon = NULL;
3548         tmp = cifs_sb->prepath;
3549         cifs_sb->prepathlen = 0;
3550         cifs_sb->prepath = NULL;
3551         kfree(tmp);
3552         if (ses)
3553                 sesInfoFree(ses);
3554
3555         FreeXid(xid);
3556         return rc;
3557 }
3558
3559 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3560                                            struct nls_table *nls_info)
3561 {
3562         int rc = 0;
3563         char ntlm_session_key[CIFS_SESS_KEY_SIZE];
3564         bool ntlmv2_flag = false;
3565         int first_time = 0;
3566
3567         /* what if server changes its buffer size after dropping the session? */
3568         if (pSesInfo->server->maxBuf == 0) /* no need to send on reconnect */ {
3569                 rc = CIFSSMBNegotiate(xid, pSesInfo);
3570                 if (rc == -EAGAIN) /* retry only once on 1st time connection */ {
3571                         rc = CIFSSMBNegotiate(xid, pSesInfo);
3572                         if (rc == -EAGAIN)
3573                                 rc = -EHOSTDOWN;
3574                 }
3575                 if (rc == 0) {
3576                         spin_lock(&GlobalMid_Lock);
3577                         if (pSesInfo->server->tcpStatus != CifsExiting)
3578                                 pSesInfo->server->tcpStatus = CifsGood;
3579                         else
3580                                 rc = -EHOSTDOWN;
3581                         spin_unlock(&GlobalMid_Lock);
3582
3583                 }
3584                 first_time = 1;
3585         }
3586         if (!rc) {
3587                 pSesInfo->flags = 0;
3588                 pSesInfo->capabilities = pSesInfo->server->capabilities;
3589                 if (linuxExtEnabled == 0)
3590                         pSesInfo->capabilities &= (~CAP_UNIX);
3591         /*      pSesInfo->sequence_number = 0;*/
3592                 cFYI(1,
3593                       ("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3594                         pSesInfo->server->secMode,
3595                         pSesInfo->server->capabilities,
3596                         pSesInfo->server->timeAdj));
3597                 if (experimEnabled < 2)
3598                         rc = CIFS_SessSetup(xid, pSesInfo,
3599                                             first_time, nls_info);
3600                 else if (extended_security
3601                                 && (pSesInfo->capabilities
3602                                         & CAP_EXTENDED_SECURITY)
3603                                 && (pSesInfo->server->secType == NTLMSSP)) {
3604                         rc = -EOPNOTSUPP;
3605                 } else if (extended_security
3606                            && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3607                            && (pSesInfo->server->secType == RawNTLMSSP)) {
3608                         cFYI(1, ("NTLMSSP sesssetup"));
3609                         rc = CIFSNTLMSSPNegotiateSessSetup(xid,
3610                                                 pSesInfo,
3611                                                 &ntlmv2_flag,
3612                                                 nls_info);
3613                         if (!rc) {
3614                                 if (ntlmv2_flag) {
3615                                         char *v2_response;
3616                                         cFYI(1, ("more secure NTLM ver2 hash"));
3617                                         if (CalcNTLMv2_partial_mac_key(pSesInfo,
3618                                                 nls_info)) {
3619                                                 rc = -ENOMEM;
3620                                                 goto ss_err_exit;
3621                                         } else
3622                                                 v2_response = kmalloc(16 + 64 /* blob */, GFP_KERNEL);
3623                                         if (v2_response) {
3624                                                 CalcNTLMv2_response(pSesInfo,
3625                                                                    v2_response);
3626                                 /*              if (first_time)
3627                                                   cifs_calculate_ntlmv2_mac_key(
3628                                                    pSesInfo->server->mac_signing_key,
3629                                                    response, ntlm_session_key,*/
3630                                                 kfree(v2_response);
3631                                         /* BB Put dummy sig in SessSetup PDU? */
3632                                         } else {
3633                                                 rc = -ENOMEM;
3634                                                 goto ss_err_exit;
3635                                         }
3636
3637                                 } else {
3638                                         SMBNTencrypt(pSesInfo->password,
3639                                                 pSesInfo->server->cryptKey,
3640                                                 ntlm_session_key);
3641
3642                                         if (first_time)
3643                                                 cifs_calculate_mac_key(
3644                                                         &pSesInfo->server->mac_signing_key,
3645                                                         ntlm_session_key,
3646                                                         pSesInfo->password);
3647                                 }
3648                         /* for better security the weaker lanman hash not sent
3649                            in AuthSessSetup so we no longer calculate it */
3650
3651                                 rc = CIFSNTLMSSPAuthSessSetup(xid,
3652                                         pSesInfo,
3653                                         ntlm_session_key,
3654                                         ntlmv2_flag,
3655                                         nls_info);
3656                         }
3657                 } else { /* old style NTLM 0.12 session setup */
3658                         SMBNTencrypt(pSesInfo->password,
3659                                 pSesInfo->server->cryptKey,
3660                                 ntlm_session_key);
3661
3662                         if (first_time)
3663                                 cifs_calculate_mac_key(
3664                                         &pSesInfo->server->mac_signing_key,
3665                                         ntlm_session_key, pSesInfo->password);
3666
3667                         rc = CIFSSessSetup(xid, pSesInfo,
3668                                 ntlm_session_key, nls_info);
3669                 }
3670                 if (rc) {
3671                         cERROR(1, ("Send error in SessSetup = %d", rc));
3672                 } else {
3673                         cFYI(1, ("CIFS Session Established successfully"));
3674                         pSesInfo->status = CifsGood;
3675                 }
3676         }
3677 ss_err_exit:
3678         return rc;
3679 }
3680