fs/cifs/connect.c

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