fs/cifs/connect.c

   1 /*
   2  *   fs/cifs/connect.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2008
   5  *   Author(s): Steve French (sfrench@us.ibm.com)
   6  *
   7  *   This library is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU Lesser General Public License as published
   9  *   by the Free Software Foundation; either version 2.1 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This library is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  15  *   the GNU Lesser General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU Lesser General Public License
  18  *   along with this library; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21 #include <linux/fs.h>
  22 #include <linux/net.h>
  23 #include <linux/string.h>
  24 #include <linux/list.h>
  25 #include <linux/wait.h>
  26 #include <linux/pagemap.h>
  27 #include <linux/ctype.h>
  28 #include <linux/utsname.h>
  29 #include <linux/mempool.h>
  30 #include <linux/delay.h>
  31 #include <linux/completion.h>
  32 #include <linux/kthread.h>
  33 #include <linux/pagevec.h>
  34 #include <linux/freezer.h>
  35 #include <asm/uaccess.h>
  36 #include <asm/processor.h>
  37 #include <net/ipv6.h>
  38 #include "cifspdu.h"
  39 #include "cifsglob.h"
  40 #include "cifsproto.h"
  41 #include "cifs_unicode.h"
  42 #include "cifs_debug.h"
  43 #include "cifs_fs_sb.h"
  44 #include "ntlmssp.h"
  45 #include "nterr.h"
  46 #include "rfc1002pdu.h"
  47 #include "cn_cifs.h"
  48
  49 #define CIFS_PORT 445
  50 #define RFC1001_PORT 139
  51
  52 extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
  53                          unsigned char *p24);
  54
  55 extern mempool_t *cifs_req_poolp;
  56
  57 struct smb_vol {
  58         char *username;
  59         char *password;
  60         char *domainname;
  61         char *UNC;
  62         char *UNCip;
  63         char *in6_addr;   /* ipv6 address as human readable form of in6_addr */
  64         char *iocharset;  /* local code page for mapping to and from Unicode */
  65         char source_rfc1001_name[16]; /* netbios name of client */
  66         char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
  67         uid_t linux_uid;
  68         gid_t linux_gid;
  69         mode_t file_mode;
  70         mode_t dir_mode;
  71         unsigned secFlg;
  72         bool rw:1;
  73         bool retry:1;
  74         bool intr:1;
  75         bool setuids:1;
  76         bool override_uid:1;
  77         bool override_gid:1;
  78         bool dynperm:1;
  79         bool noperm:1;
  80         bool no_psx_acl:1; /* set if posix acl support should be disabled */
  81         bool cifs_acl:1;
  82         bool no_xattr:1;   /* set if xattr (EA) support should be disabled*/
  83         bool server_ino:1; /* use inode numbers from server ie UniqueId */
  84         bool direct_io:1;
  85         bool remap:1;      /* set to remap seven reserved chars in filenames */
  86         bool posix_paths:1; /* unset to not ask for posix pathnames. */
  87         bool no_linux_ext:1;
  88         bool sfu_emul:1;
  89         bool nullauth:1;   /* attempt to authenticate with null user */
  90         bool nocase:1;     /* request case insensitive filenames */
  91         bool nobrl:1;      /* disable sending byte range locks to srv */
  92         bool mand_lock:1;  /* send mandatory not posix byte range lock reqs */
  93         bool seal:1;       /* request transport encryption on share */
  94         bool nodfs:1;      /* Do not request DFS, even if available */
  95         bool local_lease:1; /* check leases only on local system, not remote */
  96         bool noblocksnd:1;
  97         bool noautotune:1;
  98         bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
  99         unsigned int rsize;
 100         unsigned int wsize;
 101         unsigned int sockopt;
 102         unsigned short int port;
 103         char *prepath;
 104 };
 105
 106 static int ipv4_connect(struct TCP_Server_Info *server);
 107 static int ipv6_connect(struct TCP_Server_Info *server);
 108
 109 /*
 110  * cifs tcp session reconnection
 111  *
 112  * mark tcp session as reconnecting so temporarily locked
 113  * mark all smb sessions as reconnecting for tcp session
 114  * reconnect tcp session
 115  * wake up waiters on reconnection? - (not needed currently)
 116  */
 117 static int
 118 cifs_reconnect(struct TCP_Server_Info *server)
 119 {
 120         int rc = 0;
 121         struct list_head *tmp, *tmp2;
 122         struct cifsSesInfo *ses;
 123         struct cifsTconInfo *tcon;
 124         struct mid_q_entry *mid_entry;
 125
 126         spin_lock(&GlobalMid_Lock);
 127         if (server->tcpStatus == CifsExiting) {
 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(&cifs_tcp_ses_lock);
 142         list_for_each(tmp, &server->smb_ses_list) {
 143                 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
 144                 ses->need_reconnect = true;
 145                 ses->ipc_tid = 0;
 146                 list_for_each(tmp2, &ses->tcon_list) {
 147                         tcon = list_entry(tmp2, struct cifsTconInfo, tcon_list);
 148                         tcon->need_reconnect = true;
 149                 }
 150         }
 151         read_unlock(&cifs_tcp_ses_lock);
 152         /* do not want to be sending data on a socket we are freeing */
 153         mutex_lock(&server->srv_mutex);
 154         if (server->ssocket) {
 155                 cFYI(1, ("State: 0x%x Flags: 0x%lx", server->ssocket->state,
 156                         server->ssocket->flags));
 157                 kernel_sock_shutdown(server->ssocket, SHUT_WR);
 158                 cFYI(1, ("Post shutdown state: 0x%x Flags: 0x%lx",
 159                         server->ssocket->state,
 160                         server->ssocket->flags));
 161                 sock_release(server->ssocket);
 162                 server->ssocket = NULL;
 163         }
 164
 165         spin_lock(&GlobalMid_Lock);
 166         list_for_each(tmp, &server->pending_mid_q) {
 167                 mid_entry = list_entry(tmp, struct
 168                                         mid_q_entry,
 169                                         qhead);
 170                 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
 171                                 /* Mark other intransit requests as needing
 172                                    retry so we do not immediately mark the
 173                                    session bad again (ie after we reconnect
 174                                    below) as they timeout too */
 175                         mid_entry->midState = MID_RETRY_NEEDED;
 176                 }
 177         }
 178         spin_unlock(&GlobalMid_Lock);
 179         mutex_unlock(&server->srv_mutex);
 180
 181         while ((server->tcpStatus != CifsExiting) &&
 182                (server->tcpStatus != CifsGood)) {
 183                 try_to_freeze();
 184                 if (server->addr.sockAddr6.sin6_family == AF_INET6)
 185                         rc = ipv6_connect(server);
 186                 else
 187                         rc = ipv4_connect(server);
 188                 if (rc) {
 189                         cFYI(1, ("reconnect error %d", rc));
 190                         msleep(3000);
 191                 } else {
 192                         atomic_inc(&tcpSesReconnectCount);
 193                         spin_lock(&GlobalMid_Lock);
 194                         if (server->tcpStatus != CifsExiting)
 195                                 server->tcpStatus = CifsGood;
 196                         server->sequence_number = 0;
 197                         spin_unlock(&GlobalMid_Lock);
 198         /*              atomic_set(&server->inFlight,0);*/
 199                         wake_up(&server->response_q);
 200                 }
 201         }
 202         return rc;
 203 }
 204
 205 /*
 206         return codes:
 207                 0       not a transact2, or all data present
 208                 >0      transact2 with that much data missing
 209                 -EINVAL = invalid transact2
 210
 211  */
 212 static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
 213 {
 214         struct smb_t2_rsp *pSMBt;
 215         int total_data_size;
 216         int data_in_this_rsp;
 217         int remaining;
 218
 219         if (pSMB->Command != SMB_COM_TRANSACTION2)
 220                 return 0;
 221
 222         /* check for plausible wct, bcc and t2 data and parm sizes */
 223         /* check for parm and data offset going beyond end of smb */
 224         if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
 225                 cFYI(1, ("invalid transact2 word count"));
 226                 return -EINVAL;
 227         }
 228
 229         pSMBt = (struct smb_t2_rsp *)pSMB;
 230
 231         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 232         data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 233
 234         remaining = total_data_size - data_in_this_rsp;
 235
 236         if (remaining == 0)
 237                 return 0;
 238         else if (remaining < 0) {
 239                 cFYI(1, ("total data %d smaller than data in frame %d",
 240                         total_data_size, data_in_this_rsp));
 241                 return -EINVAL;
 242         } else {
 243                 cFYI(1, ("missing %d bytes from transact2, check next response",
 244                         remaining));
 245                 if (total_data_size > maxBufSize) {
 246                         cERROR(1, ("TotalDataSize %d is over maximum buffer %d",
 247                                 total_data_size, maxBufSize));
 248                         return -EINVAL;
 249                 }
 250                 return remaining;
 251         }
 252 }
 253
 254 static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
 255 {
 256         struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
 257         struct smb_t2_rsp *pSMBt  = (struct smb_t2_rsp *)pTargetSMB;
 258         int total_data_size;
 259         int total_in_buf;
 260         int remaining;
 261         int total_in_buf2;
 262         char *data_area_of_target;
 263         char *data_area_of_buf2;
 264         __u16 byte_count;
 265
 266         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 267
 268         if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
 269                 cFYI(1, ("total data size of primary and secondary t2 differ"));
 270         }
 271
 272         total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 273
 274         remaining = total_data_size - total_in_buf;
 275
 276         if (remaining < 0)
 277                 return -EINVAL;
 278
 279         if (remaining == 0) /* nothing to do, ignore */
 280                 return 0;
 281
 282         total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
 283         if (remaining < total_in_buf2) {
 284                 cFYI(1, ("transact2 2nd response contains too much data"));
 285         }
 286
 287         /* find end of first SMB data area */
 288         data_area_of_target = (char *)&pSMBt->hdr.Protocol +
 289                                 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
 290         /* validate target area */
 291
 292         data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
 293                                         le16_to_cpu(pSMB2->t2_rsp.DataOffset);
 294
 295         data_area_of_target += total_in_buf;
 296
 297         /* copy second buffer into end of first buffer */
 298         memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2);
 299         total_in_buf += total_in_buf2;
 300         pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
 301         byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
 302         byte_count += total_in_buf2;
 303         BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
 304
 305         byte_count = pTargetSMB->smb_buf_length;
 306         byte_count += total_in_buf2;
 307
 308         /* BB also add check that we are not beyond maximum buffer size */
 309
 310         pTargetSMB->smb_buf_length = byte_count;
 311
 312         if (remaining == total_in_buf2) {
 313                 cFYI(1, ("found the last secondary response"));
 314                 return 0; /* we are done */
 315         } else /* more responses to go */
 316                 return 1;
 317
 318 }
 319
 320 static int
 321 cifs_demultiplex_thread(struct TCP_Server_Info *server)
 322 {
 323         int length;
 324         unsigned int pdu_length, total_read;
 325         struct smb_hdr *smb_buffer = NULL;
 326         struct smb_hdr *bigbuf = NULL;
 327         struct smb_hdr *smallbuf = NULL;
 328         struct msghdr smb_msg;
 329         struct kvec iov;
 330         struct socket *csocket = server->ssocket;
 331         struct list_head *tmp;
 332         struct cifsSesInfo *ses;
 333         struct task_struct *task_to_wake = NULL;
 334         struct mid_q_entry *mid_entry;
 335         char temp;
 336         bool isLargeBuf = false;
 337         bool isMultiRsp;
 338         int reconnect;
 339
 340         current->flags |= PF_MEMALLOC;
 341         cFYI(1, ("Demultiplex PID: %d", task_pid_nr(current)));
 342
 343         length = atomic_inc_return(&tcpSesAllocCount);
 344         if (length > 1)
 345                 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
 346                                 GFP_KERNEL);
 347
 348         set_freezable();
 349         while (server->tcpStatus != CifsExiting) {
 350                 if (try_to_freeze())
 351                         continue;
 352                 if (bigbuf == NULL) {
 353                         bigbuf = cifs_buf_get();
 354                         if (!bigbuf) {
 355                                 cERROR(1, ("No memory for large SMB response"));
 356                                 msleep(3000);
 357                                 /* retry will check if exiting */
 358                                 continue;
 359                         }
 360                 } else if (isLargeBuf) {
 361                         /* we are reusing a dirty large buf, clear its start */
 362                         memset(bigbuf, 0, sizeof(struct smb_hdr));
 363                 }
 364
 365                 if (smallbuf == NULL) {
 366                         smallbuf = cifs_small_buf_get();
 367                         if (!smallbuf) {
 368                                 cERROR(1, ("No memory for SMB response"));
 369                                 msleep(1000);
 370                                 /* retry will check if exiting */
 371                                 continue;
 372                         }
 373                         /* beginning of smb buffer is cleared in our buf_get */
 374                 } else /* if existing small buf clear beginning */
 375                         memset(smallbuf, 0, sizeof(struct smb_hdr));
 376
 377                 isLargeBuf = false;
 378                 isMultiRsp = false;
 379                 smb_buffer = smallbuf;
 380                 iov.iov_base = smb_buffer;
 381                 iov.iov_len = 4;
 382                 smb_msg.msg_control = NULL;
 383                 smb_msg.msg_controllen = 0;
 384                 pdu_length = 4; /* enough to get RFC1001 header */
 385 incomplete_rcv:
 386                 length =
 387                     kernel_recvmsg(csocket, &smb_msg,
 388                                 &iov, 1, pdu_length, 0 /* BB other flags? */);
 389
 390                 if (server->tcpStatus == CifsExiting) {
 391                         break;
 392                 } else if (server->tcpStatus == CifsNeedReconnect) {
 393                         cFYI(1, ("Reconnect after server stopped responding"));
 394                         cifs_reconnect(server);
 395                         cFYI(1, ("call to reconnect done"));
 396                         csocket = server->ssocket;
 397                         continue;
 398                 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
 399                         msleep(1); /* minimum sleep to prevent looping
 400                                 allowing socket to clear and app threads to set
 401                                 tcpStatus CifsNeedReconnect if server hung */
 402                         if (pdu_length < 4) {
 403                                 iov.iov_base = (4 - pdu_length) +
 404                                                         (char *)smb_buffer;
 405                                 iov.iov_len = pdu_length;
 406                                 smb_msg.msg_control = NULL;
 407                                 smb_msg.msg_controllen = 0;
 408                                 goto incomplete_rcv;
 409                         } else
 410                                 continue;
 411                 } else if (length <= 0) {
 412                         if (server->tcpStatus == CifsNew) {
 413                                 cFYI(1, ("tcp session abend after SMBnegprot"));
 414                                 /* some servers kill the TCP session rather than
 415                                    returning an SMB negprot error, in which
 416                                    case reconnecting here is not going to help,
 417                                    and so simply return error to mount */
 418                                 break;
 419                         }
 420                         if (!try_to_freeze() && (length == -EINTR)) {
 421                                 cFYI(1, ("cifsd thread killed"));
 422                                 break;
 423                         }
 424                         cFYI(1, ("Reconnect after unexpected peek error %d",
 425                                 length));
 426                         cifs_reconnect(server);
 427                         csocket = server->ssocket;
 428                         wake_up(&server->response_q);
 429                         continue;
 430                 } else if (length < pdu_length) {
 431                         cFYI(1, ("requested %d bytes but only got %d bytes",
 432                                   pdu_length, length));
 433                         pdu_length -= length;
 434                         msleep(1);
 435                         goto incomplete_rcv;
 436                 }
 437
 438                 /* The right amount was read from socket - 4 bytes */
 439                 /* so we can now interpret the length field */
 440
 441                 /* the first byte big endian of the length field,
 442                 is actually not part of the length but the type
 443                 with the most common, zero, as regular data */
 444                 temp = *((char *) smb_buffer);
 445
 446                 /* Note that FC 1001 length is big endian on the wire,
 447                 but we convert it here so it is always manipulated
 448                 as host byte order */
 449                 pdu_length = be32_to_cpu((__force __be32)smb_buffer->smb_buf_length);
 450                 smb_buffer->smb_buf_length = pdu_length;
 451
 452                 cFYI(1, ("rfc1002 length 0x%x", pdu_length+4));
 453
 454                 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
 455                         continue;
 456                 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
 457                         cFYI(1, ("Good RFC 1002 session rsp"));
 458                         continue;
 459                 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
 460                         /* we get this from Windows 98 instead of
 461                            an error on SMB negprot response */
 462                         cFYI(1, ("Negative RFC1002 Session Response Error 0x%x)",
 463                                 pdu_length));
 464                         if (server->tcpStatus == CifsNew) {
 465                                 /* if nack on negprot (rather than
 466                                 ret of smb negprot error) reconnecting
 467                                 not going to help, ret error to mount */
 468                                 break;
 469                         } else {
 470                                 /* give server a second to
 471                                 clean up before reconnect attempt */
 472                                 msleep(1000);
 473                                 /* always try 445 first on reconnect
 474                                 since we get NACK on some if we ever
 475                                 connected to port 139 (the NACK is
 476                                 since we do not begin with RFC1001
 477                                 session initialize frame) */
 478                                 server->addr.sockAddr.sin_port =
 479                                         htons(CIFS_PORT);
 480                                 cifs_reconnect(server);
 481                                 csocket = server->ssocket;
 482                                 wake_up(&server->response_q);
 483                                 continue;
 484                         }
 485                 } else if (temp != (char) 0) {
 486                         cERROR(1, ("Unknown RFC 1002 frame"));
 487                         cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
 488                                       length);
 489                         cifs_reconnect(server);
 490                         csocket = server->ssocket;
 491                         continue;
 492                 }
 493
 494                 /* else we have an SMB response */
 495                 if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
 496                             (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) {
 497                         cERROR(1, ("Invalid size SMB length %d pdu_length %d",
 498                                         length, pdu_length+4));
 499                         cifs_reconnect(server);
 500                         csocket = server->ssocket;
 501                         wake_up(&server->response_q);
 502                         continue;
 503                 }
 504
 505                 /* else length ok */
 506                 reconnect = 0;
 507
 508                 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
 509                         isLargeBuf = true;
 510                         memcpy(bigbuf, smallbuf, 4);
 511                         smb_buffer = bigbuf;
 512                 }
 513                 length = 0;
 514                 iov.iov_base = 4 + (char *)smb_buffer;
 515                 iov.iov_len = pdu_length;
 516                 for (total_read = 0; total_read < pdu_length;
 517                      total_read += length) {
 518                         length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
 519                                                 pdu_length - total_read, 0);
 520                         if ((server->tcpStatus == CifsExiting) ||
 521                             (length == -EINTR)) {
 522                                 /* then will exit */
 523                                 reconnect = 2;
 524                                 break;
 525                         } else if (server->tcpStatus == CifsNeedReconnect) {
 526                                 cifs_reconnect(server);
 527                                 csocket = server->ssocket;
 528                                 /* Reconnect wakes up rspns q */
 529                                 /* Now we will reread sock */
 530                                 reconnect = 1;
 531                                 break;
 532                         } else if ((length == -ERESTARTSYS) ||
 533                                    (length == -EAGAIN)) {
 534                                 msleep(1); /* minimum sleep to prevent looping,
 535                                               allowing socket to clear and app
 536                                               threads to set tcpStatus
 537                                               CifsNeedReconnect if server hung*/
 538                                 length = 0;
 539                                 continue;
 540                         } else if (length <= 0) {
 541                                 cERROR(1, ("Received no data, expecting %d",
 542                                               pdu_length - total_read));
 543                                 cifs_reconnect(server);
 544                                 csocket = server->ssocket;
 545                                 reconnect = 1;
 546                                 break;
 547                         }
 548                 }
 549                 if (reconnect == 2)
 550                         break;
 551                 else if (reconnect == 1)
 552                         continue;
 553
 554                 length += 4; /* account for rfc1002 hdr */
 555
 556
 557                 dump_smb(smb_buffer, length);
 558                 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
 559                         cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
 560                         continue;
 561                 }
 562
 563
 564                 task_to_wake = NULL;
 565                 spin_lock(&GlobalMid_Lock);
 566                 list_for_each(tmp, &server->pending_mid_q) {
 567                         mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 568
 569                         if ((mid_entry->mid == smb_buffer->Mid) &&
 570                             (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
 571                             (mid_entry->command == smb_buffer->Command)) {
 572                                 if (check2ndT2(smb_buffer,server->maxBuf) > 0) {
 573                                         /* We have a multipart transact2 resp */
 574                                         isMultiRsp = true;
 575                                         if (mid_entry->resp_buf) {
 576                                                 /* merge response - fix up 1st*/
 577                                                 if (coalesce_t2(smb_buffer,
 578                                                         mid_entry->resp_buf)) {
 579                                                         mid_entry->multiRsp =
 580                                                                  true;
 581                                                         break;
 582                                                 } else {
 583                                                         /* all parts received */
 584                                                         mid_entry->multiEnd =
 585                                                                  true;
 586                                                         goto multi_t2_fnd;
 587                                                 }
 588                                         } else {
 589                                                 if (!isLargeBuf) {
 590                                                         cERROR(1,("1st trans2 resp needs bigbuf"));
 591                                         /* BB maybe we can fix this up,  switch
 592                                            to already allocated large buffer? */
 593                                                 } else {
 594                                                         /* Have first buffer */
 595                                                         mid_entry->resp_buf =
 596                                                                  smb_buffer;
 597                                                         mid_entry->largeBuf =
 598                                                                  true;
 599                                                         bigbuf = NULL;
 600                                                 }
 601                                         }
 602                                         break;
 603                                 }
 604                                 mid_entry->resp_buf = smb_buffer;
 605                                 mid_entry->largeBuf = isLargeBuf;
 606 multi_t2_fnd:
 607                                 task_to_wake = mid_entry->tsk;
 608                                 mid_entry->midState = MID_RESPONSE_RECEIVED;
 609 #ifdef CONFIG_CIFS_STATS2
 610                                 mid_entry->when_received = jiffies;
 611 #endif
 612                                 /* so we do not time out requests to  server
 613                                 which is still responding (since server could
 614                                 be busy but not dead) */
 615                                 server->lstrp = jiffies;
 616                                 break;
 617                         }
 618                 }
 619                 spin_unlock(&GlobalMid_Lock);
 620                 if (task_to_wake) {
 621                         /* Was previous buf put in mpx struct for multi-rsp? */
 622                         if (!isMultiRsp) {
 623                                 /* smb buffer will be freed by user thread */
 624                                 if (isLargeBuf)
 625                                         bigbuf = NULL;
 626                                 else
 627                                         smallbuf = NULL;
 628                         }
 629                         wake_up_process(task_to_wake);
 630                 } else if (!is_valid_oplock_break(smb_buffer, server) &&
 631                            !isMultiRsp) {
 632                         cERROR(1, ("No task to wake, unknown frame received! "
 633                                    "NumMids %d", midCount.counter));
 634                         cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
 635                                       sizeof(struct smb_hdr));
 636 #ifdef CONFIG_CIFS_DEBUG2
 637                         cifs_dump_detail(smb_buffer);
 638                         cifs_dump_mids(server);
 639 #endif /* CIFS_DEBUG2 */
 640
 641                 }
 642         } /* end while !EXITING */
 643
 644         /* take it off the list, if it's not already */
 645         write_lock(&cifs_tcp_ses_lock);
 646         list_del_init(&server->tcp_ses_list);
 647         write_unlock(&cifs_tcp_ses_lock);
 648
 649         spin_lock(&GlobalMid_Lock);
 650         server->tcpStatus = CifsExiting;
 651         spin_unlock(&GlobalMid_Lock);
 652         wake_up_all(&server->response_q);
 653
 654         /* check if we have blocked requests that need to free */
 655         /* Note that cifs_max_pending is normally 50, but
 656         can be set at module install time to as little as two */
 657         spin_lock(&GlobalMid_Lock);
 658         if (atomic_read(&server->inFlight) >= cifs_max_pending)
 659                 atomic_set(&server->inFlight, cifs_max_pending - 1);
 660         /* We do not want to set the max_pending too low or we
 661         could end up with the counter going negative */
 662         spin_unlock(&GlobalMid_Lock);
 663         /* Although there should not be any requests blocked on
 664         this queue it can not hurt to be paranoid and try to wake up requests
 665         that may haven been blocked when more than 50 at time were on the wire
 666         to the same server - they now will see the session is in exit state
 667         and get out of SendReceive.  */
 668         wake_up_all(&server->request_q);
 669         /* give those requests time to exit */
 670         msleep(125);
 671
 672         if (server->ssocket) {
 673                 sock_release(csocket);
 674                 server->ssocket = NULL;
 675         }
 676         /* buffer usuallly freed in free_mid - need to free it here on exit */
 677         cifs_buf_release(bigbuf);
 678         if (smallbuf) /* no sense logging a debug message if NULL */
 679                 cifs_small_buf_release(smallbuf);
 680
 681         /*
 682          * BB: we shouldn't have to do any of this. It shouldn't be
 683          * possible to exit from the thread with active SMB sessions
 684          */
 685         read_lock(&cifs_tcp_ses_lock);
 686         if (list_empty(&server->pending_mid_q)) {
 687                 /* loop through server session structures attached to this and
 688                     mark them dead */
 689                 list_for_each(tmp, &server->smb_ses_list) {
 690                         ses = list_entry(tmp, struct cifsSesInfo,
 691                                          smb_ses_list);
 692                         ses->status = CifsExiting;
 693                         ses->server = NULL;
 694                 }
 695                 read_unlock(&cifs_tcp_ses_lock);
 696         } else {
 697                 /* although we can not zero the server struct pointer yet,
 698                 since there are active requests which may depnd on them,
 699                 mark the corresponding SMB sessions as exiting too */
 700                 list_for_each(tmp, &server->smb_ses_list) {
 701                         ses = list_entry(tmp, struct cifsSesInfo,
 702                                          smb_ses_list);
 703                         ses->status = CifsExiting;
 704                 }
 705
 706                 spin_lock(&GlobalMid_Lock);
 707                 list_for_each(tmp, &server->pending_mid_q) {
 708                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 709                         if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
 710                                 cFYI(1, ("Clearing Mid 0x%x - waking up ",
 711                                          mid_entry->mid));
 712                                 task_to_wake = mid_entry->tsk;
 713                                 if (task_to_wake)
 714                                         wake_up_process(task_to_wake);
 715                         }
 716                 }
 717                 spin_unlock(&GlobalMid_Lock);
 718                 read_unlock(&cifs_tcp_ses_lock);
 719                 /* 1/8th of sec is more than enough time for them to exit */
 720                 msleep(125);
 721         }
 722
 723         if (!list_empty(&server->pending_mid_q)) {
 724                 /* mpx threads have not exited yet give them
 725                 at least the smb send timeout time for long ops */
 726                 /* due to delays on oplock break requests, we need
 727                 to wait at least 45 seconds before giving up
 728                 on a request getting a response and going ahead
 729                 and killing cifsd */
 730                 cFYI(1, ("Wait for exit from demultiplex thread"));
 731                 msleep(46000);
 732                 /* if threads still have not exited they are probably never
 733                 coming home not much else we can do but free the memory */
 734         }
 735
 736         /* last chance to mark ses pointers invalid
 737         if there are any pointing to this (e.g
 738         if a crazy root user tried to kill cifsd
 739         kernel thread explicitly this might happen) */
 740         /* BB: This shouldn't be necessary, see above */
 741         read_lock(&cifs_tcp_ses_lock);
 742         list_for_each(tmp, &server->smb_ses_list) {
 743                 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
 744                 ses->server = NULL;
 745         }
 746         read_unlock(&cifs_tcp_ses_lock);
 747
 748         kfree(server->hostname);
 749         task_to_wake = xchg(&server->tsk, NULL);
 750         kfree(server);
 751
 752         length = atomic_dec_return(&tcpSesAllocCount);
 753         if (length  > 0)
 754                 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
 755                                 GFP_KERNEL);
 756
 757         /* if server->tsk was NULL then wait for a signal before exiting */
 758         if (!task_to_wake) {
 759                 set_current_state(TASK_INTERRUPTIBLE);
 760                 while (!signal_pending(current)) {
 761                         schedule();
 762                         set_current_state(TASK_INTERRUPTIBLE);
 763                 }
 764                 set_current_state(TASK_RUNNING);
 765         }
 766
 767         module_put_and_exit(0);
 768 }
 769
 770 /* extract the host portion of the UNC string */
 771 static char *
 772 extract_hostname(const char *unc)
 773 {
 774         const char *src;
 775         char *dst, *delim;
 776         unsigned int len;
 777
 778         /* skip double chars at beginning of string */
 779         /* BB: check validity of these bytes? */
 780         src = unc + 2;
 781
 782         /* delimiter between hostname and sharename is always '\\' now */
 783         delim = strchr(src, '\\');
 784         if (!delim)
 785                 return ERR_PTR(-EINVAL);
 786
 787         len = delim - src;
 788         dst = kmalloc((len + 1), GFP_KERNEL);
 789         if (dst == NULL)
 790                 return ERR_PTR(-ENOMEM);
 791
 792         memcpy(dst, src, len);
 793         dst[len] = '\0';
 794
 795         return dst;
 796 }
 797
 798 static int
 799 cifs_parse_mount_options(char *options, const char *devname,
 800                          struct smb_vol *vol)
 801 {
 802         char *value;
 803         char *data;
 804         unsigned int  temp_len, i, j;
 805         char separator[2];
 806
 807         separator[0] = ',';
 808         separator[1] = 0;
 809
 810         if (Local_System_Name[0] != 0)
 811                 memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
 812         else {
 813                 char *nodename = utsname()->nodename;
 814                 int n = strnlen(nodename, 15);
 815                 memset(vol->source_rfc1001_name, 0x20, 15);
 816                 for (i = 0; i < n; i++) {
 817                         /* does not have to be perfect mapping since field is
 818                         informational, only used for servers that do not support
 819                         port 445 and it can be overridden at mount time */
 820                         vol->source_rfc1001_name[i] = toupper(nodename[i]);
 821                 }
 822         }
 823         vol->source_rfc1001_name[15] = 0;
 824         /* null target name indicates to use *SMBSERVR default called name
 825            if we end up sending RFC1001 session initialize */
 826         vol->target_rfc1001_name[0] = 0;
 827         vol->linux_uid = current_uid();  /* use current_euid() instead? */
 828         vol->linux_gid = current_gid();
 829         vol->dir_mode = S_IRWXUGO;
 830         /* 2767 perms indicate mandatory locking support */
 831         vol->file_mode = (S_IRWXUGO | S_ISGID) & (~S_IXGRP);
 832
 833         /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
 834         vol->rw = true;
 835         /* default is always to request posix paths. */
 836         vol->posix_paths = 1;
 837
 838         if (!options)
 839                 return 1;
 840
 841         if (strncmp(options, "sep=", 4) == 0) {
 842                 if (options[4] != 0) {
 843                         separator[0] = options[4];
 844                         options += 5;
 845                 } else {
 846                         cFYI(1, ("Null separator not allowed"));
 847                 }
 848         }
 849
 850         while ((data = strsep(&options, separator)) != NULL) {
 851                 if (!*data)
 852                         continue;
 853                 if ((value = strchr(data, '=')) != NULL)
 854                         *value++ = '\0';
 855
 856                 /* Have to parse this before we parse for "user" */
 857                 if (strnicmp(data, "user_xattr", 10) == 0) {
 858                         vol->no_xattr = 0;
 859                 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
 860                         vol->no_xattr = 1;
 861                 } else if (strnicmp(data, "user", 4) == 0) {
 862                         if (!value) {
 863                                 printk(KERN_WARNING
 864                                        "CIFS: invalid or missing username\n");
 865                                 return 1;       /* needs_arg; */
 866                         } else if (!*value) {
 867                                 /* null user, ie anonymous, authentication */
 868                                 vol->nullauth = 1;
 869                         }
 870                         if (strnlen(value, 200) < 200) {
 871                                 vol->username = value;
 872                         } else {
 873                                 printk(KERN_WARNING "CIFS: username too long\n");
 874                                 return 1;
 875                         }
 876                 } else if (strnicmp(data, "pass", 4) == 0) {
 877                         if (!value) {
 878                                 vol->password = NULL;
 879                                 continue;
 880                         } else if (value[0] == 0) {
 881                                 /* check if string begins with double comma
 882                                    since that would mean the password really
 883                                    does start with a comma, and would not
 884                                    indicate an empty string */
 885                                 if (value[1] != separator[0]) {
 886                                         vol->password = NULL;
 887                                         continue;
 888                                 }
 889                         }
 890                         temp_len = strlen(value);
 891                         /* removed password length check, NTLM passwords
 892                                 can be arbitrarily long */
 893
 894                         /* if comma in password, the string will be
 895                         prematurely null terminated.  Commas in password are
 896                         specified across the cifs mount interface by a double
 897                         comma ie ,, and a comma used as in other cases ie ','
 898                         as a parameter delimiter/separator is single and due
 899                         to the strsep above is temporarily zeroed. */
 900
 901                         /* NB: password legally can have multiple commas and
 902                         the only illegal character in a password is null */
 903
 904                         if ((value[temp_len] == 0) &&
 905                             (value[temp_len+1] == separator[0])) {
 906                                 /* reinsert comma */
 907                                 value[temp_len] = separator[0];
 908                                 temp_len += 2;  /* move after second comma */
 909                                 while (value[temp_len] != 0)  {
 910                                         if (value[temp_len] == separator[0]) {
 911                                                 if (value[temp_len+1] ==
 912                                                      separator[0]) {
 913                                                 /* skip second comma */
 914                                                         temp_len++;
 915                                                 } else {
 916                                                 /* single comma indicating start
 917                                                          of next parm */
 918                                                         break;
 919                                                 }
 920                                         }
 921                                         temp_len++;
 922                                 }
 923                                 if (value[temp_len] == 0) {
 924                                         options = NULL;
 925                                 } else {
 926                                         value[temp_len] = 0;
 927                                         /* point option to start of next parm */
 928                                         options = value + temp_len + 1;
 929                                 }
 930                                 /* go from value to value + temp_len condensing
 931                                 double commas to singles. Note that this ends up
 932                                 allocating a few bytes too many, which is ok */
 933                                 vol->password = kzalloc(temp_len, GFP_KERNEL);
 934                                 if (vol->password == NULL) {
 935                                         printk(KERN_WARNING "CIFS: no memory "
 936                                                             "for password\n");
 937                                         return 1;
 938                                 }
 939                                 for (i = 0, j = 0; i < temp_len; i++, j++) {
 940                                         vol->password[j] = value[i];
 941                                         if (value[i] == separator[0]
 942                                                 && value[i+1] == separator[0]) {
 943                                                 /* skip second comma */
 944                                                 i++;
 945                                         }
 946                                 }
 947                                 vol->password[j] = 0;
 948                         } else {
 949                                 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
 950                                 if (vol->password == NULL) {
 951                                         printk(KERN_WARNING "CIFS: no memory "
 952                                                             "for password\n");
 953                                         return 1;
 954                                 }
 955                                 strcpy(vol->password, value);
 956                         }
 957                 } else if (strnicmp(data, "ip", 2) == 0) {
 958                         if (!value || !*value) {
 959                                 vol->UNCip = NULL;
 960                         } else if (strnlen(value, 35) < 35) {
 961                                 vol->UNCip = value;
 962                         } else {
 963                                 printk(KERN_WARNING "CIFS: ip address "
 964                                                     "too long\n");
 965                                 return 1;
 966                         }
 967                 } else if (strnicmp(data, "sec", 3) == 0) {
 968                         if (!value || !*value) {
 969                                 cERROR(1, ("no security value specified"));
 970                                 continue;
 971                         } else if (strnicmp(value, "krb5i", 5) == 0) {
 972                                 vol->secFlg |= CIFSSEC_MAY_KRB5 |
 973                                         CIFSSEC_MUST_SIGN;
 974                         } else if (strnicmp(value, "krb5p", 5) == 0) {
 975                                 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
 976                                         CIFSSEC_MAY_KRB5; */
 977                                 cERROR(1, ("Krb5 cifs privacy not supported"));
 978                                 return 1;
 979                         } else if (strnicmp(value, "krb5", 4) == 0) {
 980                                 vol->secFlg |= CIFSSEC_MAY_KRB5;
 981                         } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
 982                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
 983                                         CIFSSEC_MUST_SIGN;
 984                         } else if (strnicmp(value, "ntlmv2", 6) == 0) {
 985                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
 986                         } else if (strnicmp(value, "ntlmi", 5) == 0) {
 987                                 vol->secFlg |= CIFSSEC_MAY_NTLM |
 988                                         CIFSSEC_MUST_SIGN;
 989                         } else if (strnicmp(value, "ntlm", 4) == 0) {
 990                                 /* ntlm is default so can be turned off too */
 991                                 vol->secFlg |= CIFSSEC_MAY_NTLM;
 992                         } else if (strnicmp(value, "nontlm", 6) == 0) {
 993                                 /* BB is there a better way to do this? */
 994                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
 995 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 996                         } else if (strnicmp(value, "lanman", 6) == 0) {
 997                                 vol->secFlg |= CIFSSEC_MAY_LANMAN;
 998 #endif
 999                         } else if (strnicmp(value, "none", 4) == 0) {
1000                                 vol->nullauth = 1;
1001                         } else {
1002                                 cERROR(1, ("bad security option: %s", value));
1003                                 return 1;
1004                         }
1005                 } else if ((strnicmp(data, "unc", 3) == 0)
1006                            || (strnicmp(data, "target", 6) == 0)
1007                            || (strnicmp(data, "path", 4) == 0)) {
1008                         if (!value || !*value) {
1009                                 printk(KERN_WARNING "CIFS: invalid path to "
1010                                                     "network resource\n");
1011                                 return 1;       /* needs_arg; */
1012                         }
1013                         if ((temp_len = strnlen(value, 300)) < 300) {
1014                                 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1015                                 if (vol->UNC == NULL)
1016                                         return 1;
1017                                 strcpy(vol->UNC, value);
1018                                 if (strncmp(vol->UNC, "//", 2) == 0) {
1019                                         vol->UNC[0] = '\\';
1020                                         vol->UNC[1] = '\\';
1021                                 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1022                                         printk(KERN_WARNING
1023                                                "CIFS: UNC Path does not begin "
1024                                                "with // or \\\\ \n");
1025                                         return 1;
1026                                 }
1027                         } else {
1028                                 printk(KERN_WARNING "CIFS: UNC name too long\n");
1029                                 return 1;
1030                         }
1031                 } else if ((strnicmp(data, "domain", 3) == 0)
1032                            || (strnicmp(data, "workgroup", 5) == 0)) {
1033                         if (!value || !*value) {
1034                                 printk(KERN_WARNING "CIFS: invalid domain name\n");
1035                                 return 1;       /* needs_arg; */
1036                         }
1037                         /* BB are there cases in which a comma can be valid in
1038                         a domain name and need special handling? */
1039                         if (strnlen(value, 256) < 256) {
1040                                 vol->domainname = value;
1041                                 cFYI(1, ("Domain name set"));
1042                         } else {
1043                                 printk(KERN_WARNING "CIFS: domain name too "
1044                                                     "long\n");
1045                                 return 1;
1046                         }
1047                 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1048                         if (!value || !*value) {
1049                                 printk(KERN_WARNING
1050                                         "CIFS: invalid path prefix\n");
1051                                 return 1;       /* needs_argument */
1052                         }
1053                         if ((temp_len = strnlen(value, 1024)) < 1024) {
1054                                 if (value[0] != '/')
1055                                         temp_len++;  /* missing leading slash */
1056                                 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1057                                 if (vol->prepath == NULL)
1058                                         return 1;
1059                                 if (value[0] != '/') {
1060                                         vol->prepath[0] = '/';
1061                                         strcpy(vol->prepath+1, value);
1062                                 } else
1063                                         strcpy(vol->prepath, value);
1064                                 cFYI(1, ("prefix path %s", vol->prepath));
1065                         } else {
1066                                 printk(KERN_WARNING "CIFS: prefix too long\n");
1067                                 return 1;
1068                         }
1069                 } else if (strnicmp(data, "iocharset", 9) == 0) {
1070                         if (!value || !*value) {
1071                                 printk(KERN_WARNING "CIFS: invalid iocharset "
1072                                                     "specified\n");
1073                                 return 1;       /* needs_arg; */
1074                         }
1075                         if (strnlen(value, 65) < 65) {
1076                                 if (strnicmp(value, "default", 7))
1077                                         vol->iocharset = value;
1078                                 /* if iocharset not set then load_nls_default
1079                                    is used by caller */
1080                                 cFYI(1, ("iocharset set to %s", value));
1081                         } else {
1082                                 printk(KERN_WARNING "CIFS: iocharset name "
1083                                                     "too long.\n");
1084                                 return 1;
1085                         }
1086                 } else if (strnicmp(data, "uid", 3) == 0) {
1087                         if (value && *value) {
1088                                 vol->linux_uid =
1089                                         simple_strtoul(value, &value, 0);
1090                                 vol->override_uid = 1;
1091                         }
1092                 } else if (strnicmp(data, "gid", 3) == 0) {
1093                         if (value && *value) {
1094                                 vol->linux_gid =
1095                                         simple_strtoul(value, &value, 0);
1096                                 vol->override_gid = 1;
1097                         }
1098                 } else if (strnicmp(data, "file_mode", 4) == 0) {
1099                         if (value && *value) {
1100                                 vol->file_mode =
1101                                         simple_strtoul(value, &value, 0);
1102                         }
1103                 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1104                         if (value && *value) {
1105                                 vol->dir_mode =
1106                                         simple_strtoul(value, &value, 0);
1107                         }
1108                 } else if (strnicmp(data, "dirmode", 4) == 0) {
1109                         if (value && *value) {
1110                                 vol->dir_mode =
1111                                         simple_strtoul(value, &value, 0);
1112                         }
1113                 } else if (strnicmp(data, "port", 4) == 0) {
1114                         if (value && *value) {
1115                                 vol->port =
1116                                         simple_strtoul(value, &value, 0);
1117                         }
1118                 } else if (strnicmp(data, "rsize", 5) == 0) {
1119                         if (value && *value) {
1120                                 vol->rsize =
1121                                         simple_strtoul(value, &value, 0);
1122                         }
1123                 } else if (strnicmp(data, "wsize", 5) == 0) {
1124                         if (value && *value) {
1125                                 vol->wsize =
1126                                         simple_strtoul(value, &value, 0);
1127                         }
1128                 } else if (strnicmp(data, "sockopt", 5) == 0) {
1129                         if (value && *value) {
1130                                 vol->sockopt =
1131                                         simple_strtoul(value, &value, 0);
1132                         }
1133                 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1134                         if (!value || !*value || (*value == ' ')) {
1135                                 cFYI(1, ("invalid (empty) netbiosname"));
1136                         } else {
1137                                 memset(vol->source_rfc1001_name, 0x20, 15);
1138                                 for (i = 0; i < 15; i++) {
1139                                 /* BB are there cases in which a comma can be
1140                                 valid in this workstation netbios name (and need
1141                                 special handling)? */
1142
1143                                 /* We do not uppercase netbiosname for user */
1144                                         if (value[i] == 0)
1145                                                 break;
1146                                         else
1147                                                 vol->source_rfc1001_name[i] =
1148                                                                 value[i];
1149                                 }
1150                                 /* The string has 16th byte zero still from
1151                                 set at top of the function  */
1152                                 if ((i == 15) && (value[i] != 0))
1153                                         printk(KERN_WARNING "CIFS: netbiosname"
1154                                                 " longer than 15 truncated.\n");
1155                         }
1156                 } else if (strnicmp(data, "servern", 7) == 0) {
1157                         /* servernetbiosname specified override *SMBSERVER */
1158                         if (!value || !*value || (*value == ' ')) {
1159                                 cFYI(1, ("empty server netbiosname specified"));
1160                         } else {
1161                                 /* last byte, type, is 0x20 for servr type */
1162                                 memset(vol->target_rfc1001_name, 0x20, 16);
1163
1164                                 for (i = 0; i < 15; i++) {
1165                                 /* BB are there cases in which a comma can be
1166                                    valid in this workstation netbios name
1167                                    (and need special handling)? */
1168
1169                                 /* user or mount helper must uppercase
1170                                    the netbiosname */
1171                                         if (value[i] == 0)
1172                                                 break;
1173                                         else
1174                                                 vol->target_rfc1001_name[i] =
1175                                                                 value[i];
1176                                 }
1177                                 /* The string has 16th byte zero still from
1178                                    set at top of the function  */
1179                                 if ((i == 15) && (value[i] != 0))
1180                                         printk(KERN_WARNING "CIFS: server net"
1181                                         "biosname longer than 15 truncated.\n");
1182                         }
1183                 } else if (strnicmp(data, "credentials", 4) == 0) {
1184                         /* ignore */
1185                 } else if (strnicmp(data, "version", 3) == 0) {
1186                         /* ignore */
1187                 } else if (strnicmp(data, "guest", 5) == 0) {
1188                         /* ignore */
1189                 } else if (strnicmp(data, "rw", 2) == 0) {
1190                         vol->rw = true;
1191                 } else if (strnicmp(data, "noblocksend", 11) == 0) {
1192                         vol->noblocksnd = 1;
1193                 } else if (strnicmp(data, "noautotune", 10) == 0) {
1194                         vol->noautotune = 1;
1195                 } else if ((strnicmp(data, "suid", 4) == 0) ||
1196                                    (strnicmp(data, "nosuid", 6) == 0) ||
1197                                    (strnicmp(data, "exec", 4) == 0) ||
1198                                    (strnicmp(data, "noexec", 6) == 0) ||
1199                                    (strnicmp(data, "nodev", 5) == 0) ||
1200                                    (strnicmp(data, "noauto", 6) == 0) ||
1201                                    (strnicmp(data, "dev", 3) == 0)) {
1202                         /*  The mount tool or mount.cifs helper (if present)
1203                             uses these opts to set flags, and the flags are read
1204                             by the kernel vfs layer before we get here (ie
1205                             before read super) so there is no point trying to
1206                             parse these options again and set anything and it
1207                             is ok to just ignore them */
1208                         continue;
1209                 } else if (strnicmp(data, "ro", 2) == 0) {
1210                         vol->rw = false;
1211                 } else if (strnicmp(data, "hard", 4) == 0) {
1212                         vol->retry = 1;
1213                 } else if (strnicmp(data, "soft", 4) == 0) {
1214                         vol->retry = 0;
1215                 } else if (strnicmp(data, "perm", 4) == 0) {
1216                         vol->noperm = 0;
1217                 } else if (strnicmp(data, "noperm", 6) == 0) {
1218                         vol->noperm = 1;
1219                 } else if (strnicmp(data, "mapchars", 8) == 0) {
1220                         vol->remap = 1;
1221                 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1222                         vol->remap = 0;
1223                 } else if (strnicmp(data, "sfu", 3) == 0) {
1224                         vol->sfu_emul = 1;
1225                 } else if (strnicmp(data, "nosfu", 5) == 0) {
1226                         vol->sfu_emul = 0;
1227                 } else if (strnicmp(data, "nodfs", 5) == 0) {
1228                         vol->nodfs = 1;
1229                 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1230                         vol->posix_paths = 1;
1231                 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1232                         vol->posix_paths = 0;
1233                 } else if (strnicmp(data, "nounix", 6) == 0) {
1234                         vol->no_linux_ext = 1;
1235                 } else if (strnicmp(data, "nolinux", 7) == 0) {
1236                         vol->no_linux_ext = 1;
1237                 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1238                            (strnicmp(data, "ignorecase", 10)  == 0)) {
1239                         vol->nocase = 1;
1240                 } else if (strnicmp(data, "brl", 3) == 0) {
1241                         vol->nobrl =  0;
1242                 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1243                            (strnicmp(data, "nolock", 6) == 0)) {
1244                         vol->nobrl =  1;
1245                         /* turn off mandatory locking in mode
1246                         if remote locking is turned off since the
1247                         local vfs will do advisory */
1248                         if (vol->file_mode ==
1249                                 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1250                                 vol->file_mode = S_IALLUGO;
1251                 } else if (strnicmp(data, "forcemandatorylock", 9) == 0) {
1252                         /* will take the shorter form "forcemand" as well */
1253                         /* This mount option will force use of mandatory
1254                           (DOS/Windows style) byte range locks, instead of
1255                           using posix advisory byte range locks, even if the
1256                           Unix extensions are available and posix locks would
1257                           be supported otherwise. If Unix extensions are not
1258                           negotiated this has no effect since mandatory locks
1259                           would be used (mandatory locks is all that those
1260                           those servers support) */
1261                         vol->mand_lock = 1;
1262                 } else if (strnicmp(data, "setuids", 7) == 0) {
1263                         vol->setuids = 1;
1264                 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1265                         vol->setuids = 0;
1266                 } else if (strnicmp(data, "dynperm", 7) == 0) {
1267                         vol->dynperm = true;
1268                 } else if (strnicmp(data, "nodynperm", 9) == 0) {
1269                         vol->dynperm = false;
1270                 } else if (strnicmp(data, "nohard", 6) == 0) {
1271                         vol->retry = 0;
1272                 } else if (strnicmp(data, "nosoft", 6) == 0) {
1273                         vol->retry = 1;
1274                 } else if (strnicmp(data, "nointr", 6) == 0) {
1275                         vol->intr = 0;
1276                 } else if (strnicmp(data, "intr", 4) == 0) {
1277                         vol->intr = 1;
1278                 } else if (strnicmp(data, "nostrictsync", 12) == 0) {
1279                         vol->nostrictsync = 1;
1280                 } else if (strnicmp(data, "strictsync", 10) == 0) {
1281                         vol->nostrictsync = 0;
1282                 } else if (strnicmp(data, "serverino", 7) == 0) {
1283                         vol->server_ino = 1;
1284                 } else if (strnicmp(data, "noserverino", 9) == 0) {
1285                         vol->server_ino = 0;
1286                 } else if (strnicmp(data, "cifsacl", 7) == 0) {
1287                         vol->cifs_acl = 1;
1288                 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1289                         vol->cifs_acl = 0;
1290                 } else if (strnicmp(data, "acl", 3) == 0) {
1291                         vol->no_psx_acl = 0;
1292                 } else if (strnicmp(data, "noacl", 5) == 0) {
1293                         vol->no_psx_acl = 1;
1294 #ifdef CONFIG_CIFS_EXPERIMENTAL
1295                 } else if (strnicmp(data, "locallease", 6) == 0) {
1296                         vol->local_lease = 1;
1297 #endif
1298                 } else if (strnicmp(data, "sign", 4) == 0) {
1299                         vol->secFlg |= CIFSSEC_MUST_SIGN;
1300                 } else if (strnicmp(data, "seal", 4) == 0) {
1301                         /* we do not do the following in secFlags because seal
1302                            is a per tree connection (mount) not a per socket
1303                            or per-smb connection option in the protocol */
1304                         /* vol->secFlg |= CIFSSEC_MUST_SEAL; */
1305                         vol->seal = 1;
1306                 } else if (strnicmp(data, "direct", 6) == 0) {
1307                         vol->direct_io = 1;
1308                 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
1309                         vol->direct_io = 1;
1310                 } else if (strnicmp(data, "in6_addr", 8) == 0) {
1311                         if (!value || !*value) {
1312                                 vol->in6_addr = NULL;
1313                         } else if (strnlen(value, 49) == 48) {
1314                                 vol->in6_addr = value;
1315                         } else {
1316                                 printk(KERN_WARNING "CIFS: ip v6 address not "
1317                                                     "48 characters long\n");
1318                                 return 1;
1319                         }
1320                 } else if (strnicmp(data, "noac", 4) == 0) {
1321                         printk(KERN_WARNING "CIFS: Mount option noac not "
1322                                 "supported. Instead set "
1323                                 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1324                 } else
1325                         printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1326                                                 data);
1327         }
1328         if (vol->UNC == NULL) {
1329                 if (devname == NULL) {
1330                         printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1331                                                 "target\n");
1332                         return 1;
1333                 }
1334                 if ((temp_len = strnlen(devname, 300)) < 300) {
1335                         vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1336                         if (vol->UNC == NULL)
1337                                 return 1;
1338                         strcpy(vol->UNC, devname);
1339                         if (strncmp(vol->UNC, "//", 2) == 0) {
1340                                 vol->UNC[0] = '\\';
1341                                 vol->UNC[1] = '\\';
1342                         } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1343                                 printk(KERN_WARNING "CIFS: UNC Path does not "
1344                                                     "begin with // or \\\\ \n");
1345                                 return 1;
1346                         }
1347                         value = strpbrk(vol->UNC+2, "/\\");
1348                         if (value)
1349                                 *value = '\\';
1350                 } else {
1351                         printk(KERN_WARNING "CIFS: UNC name too long\n");
1352                         return 1;
1353                 }
1354         }
1355         if (vol->UNCip == NULL)
1356                 vol->UNCip = &vol->UNC[2];
1357
1358         return 0;
1359 }
1360
1361 static struct TCP_Server_Info *
1362 cifs_find_tcp_session(struct sockaddr_storage *addr)
1363 {
1364         struct list_head *tmp;
1365         struct TCP_Server_Info *server;
1366         struct sockaddr_in *addr4 = (struct sockaddr_in *) addr;
1367         struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) addr;
1368
1369         write_lock(&cifs_tcp_ses_lock);
1370         list_for_each(tmp, &cifs_tcp_ses_list) {
1371                 server = list_entry(tmp, struct TCP_Server_Info,
1372                                     tcp_ses_list);
1373                 /*
1374                  * the demux thread can exit on its own while still in CifsNew
1375                  * so don't accept any sockets in that state. Since the
1376                  * tcpStatus never changes back to CifsNew it's safe to check
1377                  * for this without a lock.
1378                  */
1379                 if (server->tcpStatus == CifsNew)
1380                         continue;
1381
1382                 if (addr->ss_family == AF_INET &&
1383                     (addr4->sin_addr.s_addr !=
1384                      server->addr.sockAddr.sin_addr.s_addr))
1385                         continue;
1386                 else if (addr->ss_family == AF_INET6 &&
1387                          !ipv6_addr_equal(&server->addr.sockAddr6.sin6_addr,
1388                                           &addr6->sin6_addr))
1389                         continue;
1390
1391                 ++server->srv_count;
1392                 write_unlock(&cifs_tcp_ses_lock);
1393                 cFYI(1, ("Existing tcp session with server found"));
1394                 return server;
1395         }
1396         write_unlock(&cifs_tcp_ses_lock);
1397         return NULL;
1398 }
1399
1400 static void
1401 cifs_put_tcp_session(struct TCP_Server_Info *server)
1402 {
1403         struct task_struct *task;
1404
1405         write_lock(&cifs_tcp_ses_lock);
1406         if (--server->srv_count > 0) {
1407                 write_unlock(&cifs_tcp_ses_lock);
1408                 return;
1409         }
1410
1411         list_del_init(&server->tcp_ses_list);
1412         write_unlock(&cifs_tcp_ses_lock);
1413
1414         spin_lock(&GlobalMid_Lock);
1415         server->tcpStatus = CifsExiting;
1416         spin_unlock(&GlobalMid_Lock);
1417
1418         task = xchg(&server->tsk, NULL);
1419         if (task)
1420                 force_sig(SIGKILL, task);
1421 }
1422
1423 static struct TCP_Server_Info *
1424 cifs_get_tcp_session(struct smb_vol *volume_info)
1425 {
1426         struct TCP_Server_Info *tcp_ses = NULL;
1427         struct sockaddr_storage addr;
1428         struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
1429         struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
1430         int rc;
1431
1432         memset(&addr, 0, sizeof(struct sockaddr_storage));
1433
1434         if (volume_info->UNCip && volume_info->UNC) {
1435                 rc = cifs_inet_pton(AF_INET, volume_info->UNCip,
1436                                     &sin_server->sin_addr.s_addr);
1437
1438                 if (rc <= 0) {
1439                         /* not ipv4 address, try ipv6 */
1440                         rc = cifs_inet_pton(AF_INET6, volume_info->UNCip,
1441                                             &sin_server6->sin6_addr.in6_u);
1442                         if (rc > 0)
1443                                 addr.ss_family = AF_INET6;
1444                 } else {
1445                         addr.ss_family = AF_INET;
1446                 }
1447
1448                 if (rc <= 0) {
1449                         /* we failed translating address */
1450                         rc = -EINVAL;
1451                         goto out_err;
1452                 }
1453
1454                 cFYI(1, ("UNC: %s ip: %s", volume_info->UNC,
1455                          volume_info->UNCip));
1456         } else if (volume_info->UNCip) {
1457                 /* BB using ip addr as tcp_ses name to connect to the
1458                    DFS root below */
1459                 cERROR(1, ("Connecting to DFS root not implemented yet"));
1460                 rc = -EINVAL;
1461                 goto out_err;
1462         } else /* which tcp_sess DFS root would we conect to */ {
1463                 cERROR(1,
1464                        ("CIFS mount error: No UNC path (e.g. -o "
1465                         "unc=//192.168.1.100/public) specified"));
1466                 rc = -EINVAL;
1467                 goto out_err;
1468         }
1469
1470         /* see if we already have a matching tcp_ses */
1471         tcp_ses = cifs_find_tcp_session(&addr);
1472         if (tcp_ses)
1473                 return tcp_ses;
1474
1475         tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1476         if (!tcp_ses) {
1477                 rc = -ENOMEM;
1478                 goto out_err;
1479         }
1480
1481         tcp_ses->hostname = extract_hostname(volume_info->UNC);
1482         if (IS_ERR(tcp_ses->hostname)) {
1483                 rc = PTR_ERR(tcp_ses->hostname);
1484                 goto out_err;
1485         }
1486
1487         tcp_ses->noblocksnd = volume_info->noblocksnd;
1488         tcp_ses->noautotune = volume_info->noautotune;
1489         atomic_set(&tcp_ses->inFlight, 0);
1490         init_waitqueue_head(&tcp_ses->response_q);
1491         init_waitqueue_head(&tcp_ses->request_q);
1492         INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
1493         mutex_init(&tcp_ses->srv_mutex);
1494         memcpy(tcp_ses->workstation_RFC1001_name,
1495                 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1496         memcpy(tcp_ses->server_RFC1001_name,
1497                 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1498         tcp_ses->sequence_number = 0;
1499         INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
1500         INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
1501
1502         /*
1503          * at this point we are the only ones with the pointer
1504          * to the struct since the kernel thread not created yet
1505          * no need to spinlock this init of tcpStatus or srv_count
1506          */
1507         tcp_ses->tcpStatus = CifsNew;
1508         ++tcp_ses->srv_count;
1509
1510         if (addr.ss_family == AF_INET6) {
1511                 cFYI(1, ("attempting ipv6 connect"));
1512                 /* BB should we allow ipv6 on port 139? */
1513                 /* other OS never observed in Wild doing 139 with v6 */
1514                 memcpy(&tcp_ses->addr.sockAddr6, sin_server6,
1515                         sizeof(struct sockaddr_in6));
1516                 sin_server6->sin6_port = htons(volume_info->port);
1517                 rc = ipv6_connect(tcp_ses);
1518         } else {
1519                 memcpy(&tcp_ses->addr.sockAddr, sin_server,
1520                         sizeof(struct sockaddr_in));
1521                 sin_server->sin_port = htons(volume_info->port);
1522                 rc = ipv4_connect(tcp_ses);
1523         }
1524         if (rc < 0) {
1525                 cERROR(1, ("Error connecting to socket. Aborting operation"));
1526                 goto out_err;
1527         }
1528
1529         /*
1530          * since we're in a cifs function already, we know that
1531          * this will succeed. No need for try_module_get().
1532          */
1533         __module_get(THIS_MODULE);
1534         tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread,
1535                                   tcp_ses, "cifsd");
1536         if (IS_ERR(tcp_ses->tsk)) {
1537                 rc = PTR_ERR(tcp_ses->tsk);
1538                 cERROR(1, ("error %d create cifsd thread", rc));
1539                 module_put(THIS_MODULE);
1540                 goto out_err;
1541         }
1542
1543         /* thread spawned, put it on the list */
1544         write_lock(&cifs_tcp_ses_lock);
1545         list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
1546         write_unlock(&cifs_tcp_ses_lock);
1547
1548         return tcp_ses;
1549
1550 out_err:
1551         if (tcp_ses) {
1552                 kfree(tcp_ses->hostname);
1553                 if (tcp_ses->ssocket)
1554                         sock_release(tcp_ses->ssocket);
1555                 kfree(tcp_ses);
1556         }
1557         return ERR_PTR(rc);
1558 }
1559
1560 static struct cifsSesInfo *
1561 cifs_find_smb_ses(struct TCP_Server_Info *server, char *username)
1562 {
1563         struct list_head *tmp;
1564         struct cifsSesInfo *ses;
1565
1566         write_lock(&cifs_tcp_ses_lock);
1567         list_for_each(tmp, &server->smb_ses_list) {
1568                 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
1569                 if (strncmp(ses->userName, username, MAX_USERNAME_SIZE))
1570                         continue;
1571
1572                 ++ses->ses_count;
1573                 write_unlock(&cifs_tcp_ses_lock);
1574                 return ses;
1575         }
1576         write_unlock(&cifs_tcp_ses_lock);
1577         return NULL;
1578 }
1579
1580 static void
1581 cifs_put_smb_ses(struct cifsSesInfo *ses)
1582 {
1583         int xid;
1584         struct TCP_Server_Info *server = ses->server;
1585
1586         write_lock(&cifs_tcp_ses_lock);
1587         if (--ses->ses_count > 0) {
1588                 write_unlock(&cifs_tcp_ses_lock);
1589                 return;
1590         }
1591
1592         list_del_init(&ses->smb_ses_list);
1593         write_unlock(&cifs_tcp_ses_lock);
1594
1595         if (ses->status == CifsGood) {
1596                 xid = GetXid();
1597                 CIFSSMBLogoff(xid, ses);
1598                 _FreeXid(xid);
1599         }
1600         sesInfoFree(ses);
1601         cifs_put_tcp_session(server);
1602 }
1603
1604 static struct cifsTconInfo *
1605 cifs_find_tcon(struct cifsSesInfo *ses, const char *unc)
1606 {
1607         struct list_head *tmp;
1608         struct cifsTconInfo *tcon;
1609
1610         write_lock(&cifs_tcp_ses_lock);
1611         list_for_each(tmp, &ses->tcon_list) {
1612                 tcon = list_entry(tmp, struct cifsTconInfo, tcon_list);
1613                 if (tcon->tidStatus == CifsExiting)
1614                         continue;
1615                 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
1616                         continue;
1617
1618                 ++tcon->tc_count;
1619                 write_unlock(&cifs_tcp_ses_lock);
1620                 return tcon;
1621         }
1622         write_unlock(&cifs_tcp_ses_lock);
1623         return NULL;
1624 }
1625
1626 static void
1627 cifs_put_tcon(struct cifsTconInfo *tcon)
1628 {
1629         int xid;
1630         struct cifsSesInfo *ses = tcon->ses;
1631
1632         write_lock(&cifs_tcp_ses_lock);
1633         if (--tcon->tc_count > 0) {
1634                 write_unlock(&cifs_tcp_ses_lock);
1635                 return;
1636         }
1637
1638         list_del_init(&tcon->tcon_list);
1639         write_unlock(&cifs_tcp_ses_lock);
1640
1641         xid = GetXid();
1642         CIFSSMBTDis(xid, tcon);
1643         _FreeXid(xid);
1644
1645         DeleteTconOplockQEntries(tcon);
1646         tconInfoFree(tcon);
1647         cifs_put_smb_ses(ses);
1648 }
1649
1650 int
1651 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
1652              const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
1653              struct dfs_info3_param **preferrals, int remap)
1654 {
1655         char *temp_unc;
1656         int rc = 0;
1657
1658         *pnum_referrals = 0;
1659         *preferrals = NULL;
1660
1661         if (pSesInfo->ipc_tid == 0) {
1662                 temp_unc = kmalloc(2 /* for slashes */ +
1663                         strnlen(pSesInfo->serverName,
1664                                 SERVER_NAME_LEN_WITH_NULL * 2)
1665                                  + 1 + 4 /* slash IPC$ */  + 2,
1666                                 GFP_KERNEL);
1667                 if (temp_unc == NULL)
1668                         return -ENOMEM;
1669                 temp_unc[0] = '\\';
1670                 temp_unc[1] = '\\';
1671                 strcpy(temp_unc + 2, pSesInfo->serverName);
1672                 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1673                 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1674                 cFYI(1,
1675                      ("CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid));
1676                 kfree(temp_unc);
1677         }
1678         if (rc == 0)
1679                 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1680                                      pnum_referrals, nls_codepage, remap);
1681         /* BB map targetUNCs to dfs_info3 structures, here or
1682                 in CIFSGetDFSRefer BB */
1683
1684         return rc;
1685 }
1686
1687 #ifdef CONFIG_DEBUG_LOCK_ALLOC
1688 static struct lock_class_key cifs_key[2];
1689 static struct lock_class_key cifs_slock_key[2];
1690
1691 static inline void
1692 cifs_reclassify_socket4(struct socket *sock)
1693 {
1694         struct sock *sk = sock->sk;
1695         BUG_ON(sock_owned_by_user(sk));
1696         sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
1697                 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
1698 }
1699
1700 static inline void
1701 cifs_reclassify_socket6(struct socket *sock)
1702 {
1703         struct sock *sk = sock->sk;
1704         BUG_ON(sock_owned_by_user(sk));
1705         sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
1706                 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
1707 }
1708 #else
1709 static inline void
1710 cifs_reclassify_socket4(struct socket *sock)
1711 {
1712 }
1713
1714 static inline void
1715 cifs_reclassify_socket6(struct socket *sock)
1716 {
1717 }
1718 #endif
1719
1720 /* See RFC1001 section 14 on representation of Netbios names */
1721 static void rfc1002mangle(char *target, char *source, unsigned int length)
1722 {
1723         unsigned int i, j;
1724
1725         for (i = 0, j = 0; i < (length); i++) {
1726                 /* mask a nibble at a time and encode */
1727                 target[j] = 'A' + (0x0F & (source[i] >> 4));
1728                 target[j+1] = 'A' + (0x0F & source[i]);
1729                 j += 2;
1730         }
1731
1732 }
1733
1734
1735 static int
1736 ipv4_connect(struct TCP_Server_Info *server)
1737 {
1738         int rc = 0;
1739         bool connected = false;
1740         __be16 orig_port = 0;
1741         struct socket *socket = server->ssocket;
1742
1743         if (socket == NULL) {
1744                 rc = sock_create_kern(PF_INET, SOCK_STREAM,
1745                                       IPPROTO_TCP, &socket);
1746                 if (rc < 0) {
1747                         cERROR(1, ("Error %d creating socket", rc));
1748                         return rc;
1749                 }
1750
1751                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1752                 cFYI(1, ("Socket created"));
1753                 server->ssocket = socket;
1754                 socket->sk->sk_allocation = GFP_NOFS;
1755                 cifs_reclassify_socket4(socket);
1756         }
1757
1758         /* user overrode default port */
1759         if (server->addr.sockAddr.sin_port) {
1760                 rc = socket->ops->connect(socket, (struct sockaddr *)
1761                                           &server->addr.sockAddr,
1762                                           sizeof(struct sockaddr_in), 0);
1763                 if (rc >= 0)
1764                         connected = true;
1765         }
1766
1767         if (!connected) {
1768                 /* save original port so we can retry user specified port
1769                         later if fall back ports fail this time  */
1770                 orig_port = server->addr.sockAddr.sin_port;
1771
1772                 /* do not retry on the same port we just failed on */
1773                 if (server->addr.sockAddr.sin_port != htons(CIFS_PORT)) {
1774                         server->addr.sockAddr.sin_port = htons(CIFS_PORT);
1775                         rc = socket->ops->connect(socket,
1776                                                 (struct sockaddr *)
1777                                                 &server->addr.sockAddr,
1778                                                 sizeof(struct sockaddr_in), 0);
1779                         if (rc >= 0)
1780                                 connected = true;
1781                 }
1782         }
1783         if (!connected) {
1784                 server->addr.sockAddr.sin_port = htons(RFC1001_PORT);
1785                 rc = socket->ops->connect(socket, (struct sockaddr *)
1786                                               &server->addr.sockAddr,
1787                                               sizeof(struct sockaddr_in), 0);
1788                 if (rc >= 0)
1789                         connected = true;
1790         }
1791
1792         /* give up here - unless we want to retry on different
1793                 protocol families some day */
1794         if (!connected) {
1795                 if (orig_port)
1796                         server->addr.sockAddr.sin_port = orig_port;
1797                 cFYI(1, ("Error %d connecting to server via ipv4", rc));
1798                 sock_release(socket);
1799                 server->ssocket = NULL;
1800                 return rc;
1801         }
1802
1803
1804         /*
1805          * Eventually check for other socket options to change from
1806          *  the default. sock_setsockopt not used because it expects
1807          *  user space buffer
1808          */
1809         socket->sk->sk_rcvtimeo = 7 * HZ;
1810         socket->sk->sk_sndtimeo = 5 * HZ;
1811
1812         /* make the bufsizes depend on wsize/rsize and max requests */
1813         if (server->noautotune) {
1814                 if (socket->sk->sk_sndbuf < (200 * 1024))
1815                         socket->sk->sk_sndbuf = 200 * 1024;
1816                 if (socket->sk->sk_rcvbuf < (140 * 1024))
1817                         socket->sk->sk_rcvbuf = 140 * 1024;
1818         }
1819
1820          cFYI(1, ("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
1821                  socket->sk->sk_sndbuf,
1822                  socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo));
1823
1824         /* send RFC1001 sessinit */
1825         if (server->addr.sockAddr.sin_port == htons(RFC1001_PORT)) {
1826                 /* some servers require RFC1001 sessinit before sending
1827                 negprot - BB check reconnection in case where second
1828                 sessinit is sent but no second negprot */
1829                 struct rfc1002_session_packet *ses_init_buf;
1830                 struct smb_hdr *smb_buf;
1831                 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
1832                                        GFP_KERNEL);
1833                 if (ses_init_buf) {
1834                         ses_init_buf->trailer.session_req.called_len = 32;
1835                         if (server->server_RFC1001_name &&
1836                             server->server_RFC1001_name[0] != 0)
1837                                 rfc1002mangle(ses_init_buf->trailer.
1838                                                 session_req.called_name,
1839                                               server->server_RFC1001_name,
1840                                               RFC1001_NAME_LEN_WITH_NULL);
1841                         else
1842                                 rfc1002mangle(ses_init_buf->trailer.
1843                                                 session_req.called_name,
1844                                               DEFAULT_CIFS_CALLED_NAME,
1845                                               RFC1001_NAME_LEN_WITH_NULL);
1846
1847                         ses_init_buf->trailer.session_req.calling_len = 32;
1848
1849                         /* calling name ends in null (byte 16) from old smb
1850                         convention. */
1851                         if (server->workstation_RFC1001_name &&
1852                             server->workstation_RFC1001_name[0] != 0)
1853                                 rfc1002mangle(ses_init_buf->trailer.
1854                                                 session_req.calling_name,
1855                                               server->workstation_RFC1001_name,
1856                                               RFC1001_NAME_LEN_WITH_NULL);
1857                         else
1858                                 rfc1002mangle(ses_init_buf->trailer.
1859                                                 session_req.calling_name,
1860                                               "LINUX_CIFS_CLNT",
1861                                               RFC1001_NAME_LEN_WITH_NULL);
1862
1863                         ses_init_buf->trailer.session_req.scope1 = 0;
1864                         ses_init_buf->trailer.session_req.scope2 = 0;
1865                         smb_buf = (struct smb_hdr *)ses_init_buf;
1866                         /* sizeof RFC1002_SESSION_REQUEST with no scope */
1867                         smb_buf->smb_buf_length = 0x81000044;
1868                         rc = smb_send(server, smb_buf, 0x44);
1869                         kfree(ses_init_buf);
1870                         msleep(1); /* RFC1001 layer in at least one server
1871                                       requires very short break before negprot
1872                                       presumably because not expecting negprot
1873                                       to follow so fast.  This is a simple
1874                                       solution that works without
1875                                       complicating the code and causes no
1876                                       significant slowing down on mount
1877                                       for everyone else */
1878                 }
1879                 /* else the negprot may still work without this
1880                 even though malloc failed */
1881
1882         }
1883
1884         return rc;
1885 }
1886
1887 static int
1888 ipv6_connect(struct TCP_Server_Info *server)
1889 {
1890         int rc = 0;
1891         bool connected = false;
1892         __be16 orig_port = 0;
1893         struct socket *socket = server->ssocket;
1894
1895         if (socket == NULL) {
1896                 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
1897                                       IPPROTO_TCP, &socket);
1898                 if (rc < 0) {
1899                         cERROR(1, ("Error %d creating ipv6 socket", rc));
1900                         socket = NULL;
1901                         return rc;
1902                 }
1903
1904                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1905                 cFYI(1, ("ipv6 Socket created"));
1906                 server->ssocket = socket;
1907                 socket->sk->sk_allocation = GFP_NOFS;
1908                 cifs_reclassify_socket6(socket);
1909         }
1910
1911         /* user overrode default port */
1912         if (server->addr.sockAddr6.sin6_port) {
1913                 rc = socket->ops->connect(socket,
1914                                 (struct sockaddr *) &server->addr.sockAddr6,
1915                                 sizeof(struct sockaddr_in6), 0);
1916                 if (rc >= 0)
1917                         connected = true;
1918         }
1919
1920         if (!connected) {
1921                 /* save original port so we can retry user specified port
1922                         later if fall back ports fail this time  */
1923
1924                 orig_port = server->addr.sockAddr6.sin6_port;
1925                 /* do not retry on the same port we just failed on */
1926                 if (server->addr.sockAddr6.sin6_port != htons(CIFS_PORT)) {
1927                         server->addr.sockAddr6.sin6_port = htons(CIFS_PORT);
1928                         rc = socket->ops->connect(socket, (struct sockaddr *)
1929                                         &server->addr.sockAddr6,
1930                                         sizeof(struct sockaddr_in6), 0);
1931                         if (rc >= 0)
1932                                 connected = true;
1933                 }
1934         }
1935         if (!connected) {
1936                 server->addr.sockAddr6.sin6_port = htons(RFC1001_PORT);
1937                 rc = socket->ops->connect(socket, (struct sockaddr *)
1938                                 &server->addr.sockAddr6,
1939                                 sizeof(struct sockaddr_in6), 0);
1940                 if (rc >= 0)
1941                         connected = true;
1942         }
1943
1944         /* give up here - unless we want to retry on different
1945                 protocol families some day */
1946         if (!connected) {
1947                 if (orig_port)
1948                         server->addr.sockAddr6.sin6_port = orig_port;
1949                 cFYI(1, ("Error %d connecting to server via ipv6", rc));
1950                 sock_release(socket);
1951                 server->ssocket = NULL;
1952                 return rc;
1953         }
1954
1955         /*
1956          * Eventually check for other socket options to change from
1957          * the default. sock_setsockopt not used because it expects
1958          * user space buffer
1959          */
1960         socket->sk->sk_rcvtimeo = 7 * HZ;
1961         socket->sk->sk_sndtimeo = 5 * HZ;
1962         server->ssocket = socket;
1963
1964         return rc;
1965 }
1966
1967 void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
1968                           struct super_block *sb, struct smb_vol *vol_info)
1969 {
1970         /* if we are reconnecting then should we check to see if
1971          * any requested capabilities changed locally e.g. via
1972          * remount but we can not do much about it here
1973          * if they have (even if we could detect it by the following)
1974          * Perhaps we could add a backpointer to array of sb from tcon
1975          * or if we change to make all sb to same share the same
1976          * sb as NFS - then we only have one backpointer to sb.
1977          * What if we wanted to mount the server share twice once with
1978          * and once without posixacls or posix paths? */
1979         __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1980
1981         if (vol_info && vol_info->no_linux_ext) {
1982                 tcon->fsUnixInfo.Capability = 0;
1983                 tcon->unix_ext = 0; /* Unix Extensions disabled */
1984                 cFYI(1, ("Linux protocol extensions disabled"));
1985                 return;
1986         } else if (vol_info)
1987                 tcon->unix_ext = 1; /* Unix Extensions supported */
1988
1989         if (tcon->unix_ext == 0) {
1990                 cFYI(1, ("Unix extensions disabled so not set on reconnect"));
1991                 return;
1992         }
1993
1994         if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
1995                 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1996
1997                 /* check for reconnect case in which we do not
1998                    want to change the mount behavior if we can avoid it */
1999                 if (vol_info == NULL) {
2000                         /* turn off POSIX ACL and PATHNAMES if not set
2001                            originally at mount time */
2002                         if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
2003                                 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
2004                         if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2005                                 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2006                                         cERROR(1, ("POSIXPATH support change"));
2007                                 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2008                         } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2009                                 cERROR(1, ("possible reconnect error"));
2010                                 cERROR(1,
2011                                         ("server disabled POSIX path support"));
2012                         }
2013                 }
2014
2015                 cap &= CIFS_UNIX_CAP_MASK;
2016                 if (vol_info && vol_info->no_psx_acl)
2017                         cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
2018                 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
2019                         cFYI(1, ("negotiated posix acl support"));
2020                         if (sb)
2021                                 sb->s_flags |= MS_POSIXACL;
2022                 }
2023
2024                 if (vol_info && vol_info->posix_paths == 0)
2025                         cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2026                 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
2027                         cFYI(1, ("negotiate posix pathnames"));
2028                         if (sb)
2029                                 CIFS_SB(sb)->mnt_cifs_flags |=
2030                                         CIFS_MOUNT_POSIX_PATHS;
2031                 }
2032
2033                 /* We might be setting the path sep back to a different
2034                 form if we are reconnecting and the server switched its
2035                 posix path capability for this share */
2036                 if (sb && (CIFS_SB(sb)->prepathlen > 0))
2037                         CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
2038
2039                 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
2040                         if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
2041                                 CIFS_SB(sb)->rsize = 127 * 1024;
2042                                 cFYI(DBG2,
2043                                         ("larger reads not supported by srv"));
2044                         }
2045                 }
2046
2047
2048                 cFYI(1, ("Negotiate caps 0x%x", (int)cap));
2049 #ifdef CONFIG_CIFS_DEBUG2
2050                 if (cap & CIFS_UNIX_FCNTL_CAP)
2051                         cFYI(1, ("FCNTL cap"));
2052                 if (cap & CIFS_UNIX_EXTATTR_CAP)
2053                         cFYI(1, ("EXTATTR cap"));
2054                 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2055                         cFYI(1, ("POSIX path cap"));
2056                 if (cap & CIFS_UNIX_XATTR_CAP)
2057                         cFYI(1, ("XATTR cap"));
2058                 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
2059                         cFYI(1, ("POSIX ACL cap"));
2060                 if (cap & CIFS_UNIX_LARGE_READ_CAP)
2061                         cFYI(1, ("very large read cap"));
2062                 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
2063                         cFYI(1, ("very large write cap"));
2064 #endif /* CIFS_DEBUG2 */
2065                 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
2066                         if (vol_info == NULL) {
2067                                 cFYI(1, ("resetting capabilities failed"));
2068                         } else
2069                                 cERROR(1, ("Negotiating Unix capabilities "
2070                                            "with the server failed.  Consider "
2071                                            "mounting with the Unix Extensions\n"
2072                                            "disabled, if problems are found, "
2073                                            "by specifying the nounix mount "
2074                                            "option."));
2075
2076                 }
2077         }
2078 }
2079
2080 static void
2081 convert_delimiter(char *path, char delim)
2082 {
2083         int i;
2084         char old_delim;
2085
2086         if (path == NULL)
2087                 return;
2088
2089         if (delim == '/')
2090                 old_delim = '\\';
2091         else
2092                 old_delim = '/';
2093
2094         for (i = 0; path[i] != '\0'; i++) {
2095                 if (path[i] == old_delim)
2096                         path[i] = delim;
2097         }
2098 }
2099
2100 static void setup_cifs_sb(struct smb_vol *pvolume_info,
2101                           struct cifs_sb_info *cifs_sb)
2102 {
2103         if (pvolume_info->rsize > CIFSMaxBufSize) {
2104                 cERROR(1, ("rsize %d too large, using MaxBufSize",
2105                         pvolume_info->rsize));
2106                 cifs_sb->rsize = CIFSMaxBufSize;
2107         } else if ((pvolume_info->rsize) &&
2108                         (pvolume_info->rsize <= CIFSMaxBufSize))
2109                 cifs_sb->rsize = pvolume_info->rsize;
2110         else /* default */
2111                 cifs_sb->rsize = CIFSMaxBufSize;
2112
2113         if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
2114                 cERROR(1, ("wsize %d too large, using 4096 instead",
2115                           pvolume_info->wsize));
2116                 cifs_sb->wsize = 4096;
2117         } else if (pvolume_info->wsize)
2118                 cifs_sb->wsize = pvolume_info->wsize;
2119         else
2120                 cifs_sb->wsize = min_t(const int,
2121                                         PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2122                                         127*1024);
2123                 /* old default of CIFSMaxBufSize was too small now
2124                    that SMB Write2 can send multiple pages in kvec.
2125                    RFC1001 does not describe what happens when frame
2126                    bigger than 128K is sent so use that as max in
2127                    conjunction with 52K kvec constraint on arch with 4K
2128                    page size  */
2129
2130         if (cifs_sb->rsize < 2048) {
2131                 cifs_sb->rsize = 2048;
2132                 /* Windows ME may prefer this */
2133                 cFYI(1, ("readsize set to minimum: 2048"));
2134         }
2135         /* calculate prepath */
2136         cifs_sb->prepath = pvolume_info->prepath;
2137         if (cifs_sb->prepath) {
2138                 cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2139                 /* we can not convert the / to \ in the path
2140                 separators in the prefixpath yet because we do not
2141                 know (until reset_cifs_unix_caps is called later)
2142                 whether POSIX PATH CAP is available. We normalize
2143                 the / to \ after reset_cifs_unix_caps is called */
2144                 pvolume_info->prepath = NULL;
2145         } else
2146                 cifs_sb->prepathlen = 0;
2147         cifs_sb->mnt_uid = pvolume_info->linux_uid;
2148         cifs_sb->mnt_gid = pvolume_info->linux_gid;
2149         cifs_sb->mnt_file_mode = pvolume_info->file_mode;
2150         cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
2151         cFYI(1, ("file mode: 0x%x  dir mode: 0x%x",
2152                 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode));
2153
2154         if (pvolume_info->noperm)
2155                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2156         if (pvolume_info->setuids)
2157                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2158         if (pvolume_info->server_ino)
2159                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2160         if (pvolume_info->remap)
2161                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2162         if (pvolume_info->no_xattr)
2163                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2164         if (pvolume_info->sfu_emul)
2165                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2166         if (pvolume_info->nobrl)
2167                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2168         if (pvolume_info->nostrictsync)
2169                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
2170         if (pvolume_info->mand_lock)
2171                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
2172         if (pvolume_info->cifs_acl)
2173                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2174         if (pvolume_info->override_uid)
2175                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2176         if (pvolume_info->override_gid)
2177                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2178         if (pvolume_info->dynperm)
2179                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
2180         if (pvolume_info->direct_io) {
2181                 cFYI(1, ("mounting share using direct i/o"));
2182                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2183         }
2184
2185         if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
2186                 cERROR(1, ("mount option dynperm ignored if cifsacl "
2187                            "mount option supported"));
2188 }
2189
2190 static int
2191 is_path_accessible(int xid, struct cifsTconInfo *tcon,
2192                    struct cifs_sb_info *cifs_sb, const char *full_path)
2193 {
2194         int rc;
2195         __u64 inode_num;
2196         FILE_ALL_INFO *pfile_info;
2197
2198         rc = CIFSGetSrvInodeNumber(xid, tcon, full_path, &inode_num,
2199                                    cifs_sb->local_nls,
2200                                    cifs_sb->mnt_cifs_flags &
2201                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
2202         if (rc != -EOPNOTSUPP)
2203                 return rc;
2204
2205         pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
2206         if (pfile_info == NULL)
2207                 return -ENOMEM;
2208
2209         rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info,
2210                               0 /* not legacy */, cifs_sb->local_nls,
2211                               cifs_sb->mnt_cifs_flags &
2212                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
2213         kfree(pfile_info);
2214         return rc;
2215 }
2216
2217 static void
2218 cleanup_volume_info(struct smb_vol **pvolume_info)
2219 {
2220         struct smb_vol *volume_info;
2221
2222         if (!pvolume_info && !*pvolume_info)
2223                 return;
2224
2225         volume_info = *pvolume_info;
2226         kzfree(volume_info->password);
2227         kfree(volume_info->UNC);
2228         kfree(volume_info->prepath);
2229         kfree(volume_info);
2230         *pvolume_info = NULL;
2231         return;
2232 }
2233
2234 /* build_path_to_root returns full path to root when
2235  * we do not have an exiting connection (tcon) */
2236 static char *
2237 build_unc_path_to_root(const struct smb_vol *volume_info,
2238                 const struct cifs_sb_info *cifs_sb)
2239 {
2240         char *full_path;
2241
2242         int unc_len = strnlen(volume_info->UNC, MAX_TREE_SIZE + 1);
2243         full_path = kmalloc(unc_len + cifs_sb->prepathlen + 1, GFP_KERNEL);
2244         if (full_path == NULL)
2245                 return ERR_PTR(-ENOMEM);
2246
2247         strncpy(full_path, volume_info->UNC, unc_len);
2248         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) {
2249                 int i;
2250                 for (i = 0; i < unc_len; i++) {
2251                         if (full_path[i] == '\\')
2252                                 full_path[i] = '/';
2253                 }
2254         }
2255
2256         if (cifs_sb->prepathlen)
2257                 strncpy(full_path + unc_len, cifs_sb->prepath,
2258                                 cifs_sb->prepathlen);
2259
2260         full_path[unc_len + cifs_sb->prepathlen] = 0; /* add trailing null */
2261         return full_path;
2262 }
2263
2264 int
2265 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
2266                 char *mount_data_global, const char *devname)
2267 {
2268         int rc = 0;
2269         int xid;
2270         struct smb_vol *volume_info;
2271         struct cifsSesInfo *pSesInfo = NULL;
2272         struct cifsTconInfo *tcon = NULL;
2273         struct TCP_Server_Info *srvTcp = NULL;
2274         char   *full_path;
2275         struct dfs_info3_param *referrals = NULL;
2276         unsigned int num_referrals = 0;
2277
2278         char *mount_data = mount_data_global;
2279
2280 try_mount_again:
2281         full_path = NULL;
2282
2283         xid = GetXid();
2284
2285         volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
2286         if (!volume_info) {
2287                 rc = -ENOMEM;
2288                 goto out;
2289         }
2290
2291         if (cifs_parse_mount_options(mount_data, devname, volume_info)) {
2292                 rc = -EINVAL;
2293                 goto out;
2294         }
2295
2296         if (volume_info->nullauth) {
2297                 cFYI(1, ("null user"));
2298                 volume_info->username = "";
2299         } else if (volume_info->username) {
2300                 /* BB fixme parse for domain name here */
2301                 cFYI(1, ("Username: %s", volume_info->username));
2302         } else {
2303                 cifserror("No username specified");
2304         /* In userspace mount helper we can get user name from alternate
2305            locations such as env variables and files on disk */
2306                 rc = -EINVAL;
2307                 goto out;
2308         }
2309
2310
2311         /* this is needed for ASCII cp to Unicode converts */
2312         if (volume_info->iocharset == NULL) {
2313                 cifs_sb->local_nls = load_nls_default();
2314         /* load_nls_default can not return null */
2315         } else {
2316                 cifs_sb->local_nls = load_nls(volume_info->iocharset);
2317                 if (cifs_sb->local_nls == NULL) {
2318                         cERROR(1, ("CIFS mount error: iocharset %s not found",
2319                                  volume_info->iocharset));
2320                         rc = -ELIBACC;
2321                         goto out;
2322                 }
2323         }
2324
2325         /* get a reference to a tcp session */
2326         srvTcp = cifs_get_tcp_session(volume_info);
2327         if (IS_ERR(srvTcp)) {
2328                 rc = PTR_ERR(srvTcp);
2329                 goto out;
2330         }
2331
2332         pSesInfo = cifs_find_smb_ses(srvTcp, volume_info->username);
2333         if (pSesInfo) {
2334                 cFYI(1, ("Existing smb sess found (status=%d)",
2335                         pSesInfo->status));
2336                 /*
2337                  * The existing SMB session already has a reference to srvTcp,
2338                  * so we can put back the extra one we got before
2339                  */
2340                 cifs_put_tcp_session(srvTcp);
2341
2342                 down(&pSesInfo->sesSem);
2343                 if (pSesInfo->need_reconnect) {
2344                         cFYI(1, ("Session needs reconnect"));
2345                         rc = cifs_setup_session(xid, pSesInfo,
2346                                                 cifs_sb->local_nls);
2347                 }
2348                 up(&pSesInfo->sesSem);
2349         } else if (!rc) {
2350                 cFYI(1, ("Existing smb sess not found"));
2351                 pSesInfo = sesInfoAlloc();
2352                 if (pSesInfo == NULL) {
2353                         rc = -ENOMEM;
2354                         goto mount_fail_check;
2355                 }
2356
2357                 /* new SMB session uses our srvTcp ref */
2358                 pSesInfo->server = srvTcp;
2359                 if (srvTcp->addr.sockAddr6.sin6_family == AF_INET6)
2360                         sprintf(pSesInfo->serverName, "%pI6",
2361                                 &srvTcp->addr.sockAddr6.sin6_addr);
2362                 else
2363                         sprintf(pSesInfo->serverName, "%pI4",
2364                                 &srvTcp->addr.sockAddr.sin_addr.s_addr);
2365
2366                 write_lock(&cifs_tcp_ses_lock);
2367                 list_add(&pSesInfo->smb_ses_list, &srvTcp->smb_ses_list);
2368                 write_unlock(&cifs_tcp_ses_lock);
2369
2370                 /* volume_info->password freed at unmount */
2371                 if (volume_info->password) {
2372                         pSesInfo->password = kstrdup(volume_info->password,
2373                                                      GFP_KERNEL);
2374                         if (!pSesInfo->password) {
2375                                 rc = -ENOMEM;
2376                                 goto mount_fail_check;
2377                         }
2378                 }
2379                 if (volume_info->username)
2380                         strncpy(pSesInfo->userName, volume_info->username,
2381                                 MAX_USERNAME_SIZE);
2382                 if (volume_info->domainname) {
2383                         int len = strlen(volume_info->domainname);
2384                         pSesInfo->domainName = kmalloc(len + 1, GFP_KERNEL);
2385                         if (pSesInfo->domainName)
2386                                 strcpy(pSesInfo->domainName,
2387                                         volume_info->domainname);
2388                 }
2389                 pSesInfo->linux_uid = volume_info->linux_uid;
2390                 pSesInfo->overrideSecFlg = volume_info->secFlg;
2391                 down(&pSesInfo->sesSem);
2392
2393                 /* BB FIXME need to pass vol->secFlgs BB */
2394                 rc = cifs_setup_session(xid, pSesInfo,
2395                                         cifs_sb->local_nls);
2396                 up(&pSesInfo->sesSem);
2397         }
2398
2399         /* search for existing tcon to this server share */
2400         if (!rc) {
2401                 setup_cifs_sb(volume_info, cifs_sb);
2402
2403                 tcon = cifs_find_tcon(pSesInfo, volume_info->UNC);
2404                 if (tcon) {
2405                         cFYI(1, ("Found match on UNC path"));
2406                         /* existing tcon already has a reference */
2407                         cifs_put_smb_ses(pSesInfo);
2408                         if (tcon->seal != volume_info->seal)
2409                                 cERROR(1, ("transport encryption setting "
2410                                            "conflicts with existing tid"));
2411                 } else {
2412                         tcon = tconInfoAlloc();
2413                         if (tcon == NULL) {
2414                                 rc = -ENOMEM;
2415                                 goto mount_fail_check;
2416                         }
2417
2418                         tcon->ses = pSesInfo;
2419                         if (volume_info->password) {
2420                                 tcon->password = kstrdup(volume_info->password,
2421                                                          GFP_KERNEL);
2422                                 if (!tcon->password) {
2423                                         rc = -ENOMEM;
2424                                         goto mount_fail_check;
2425                                 }
2426                         }
2427
2428                         if ((strchr(volume_info->UNC + 3, '\\') == NULL)
2429                             && (strchr(volume_info->UNC + 3, '/') == NULL)) {
2430                                 cERROR(1, ("Missing share name"));
2431                                 rc = -ENODEV;
2432                                 goto mount_fail_check;
2433                         } else {
2434                                 /* BB Do we need to wrap sesSem around
2435                                  * this TCon call and Unix SetFS as
2436                                  * we do on SessSetup and reconnect? */
2437                                 rc = CIFSTCon(xid, pSesInfo, volume_info->UNC,
2438                                               tcon, cifs_sb->local_nls);
2439                                 cFYI(1, ("CIFS Tcon rc = %d", rc));
2440                                 if (volume_info->nodfs) {
2441                                         tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
2442                                         cFYI(1, ("DFS disabled (%d)",
2443                                                 tcon->Flags));
2444                                 }
2445                         }
2446                         if (rc)
2447                                 goto remote_path_check;
2448                         tcon->seal = volume_info->seal;
2449                         write_lock(&cifs_tcp_ses_lock);
2450                         list_add(&tcon->tcon_list, &pSesInfo->tcon_list);
2451                         write_unlock(&cifs_tcp_ses_lock);
2452                 }
2453
2454                 /* we can have only one retry value for a connection
2455                    to a share so for resources mounted more than once
2456                    to the same server share the last value passed in
2457                    for the retry flag is used */
2458                 tcon->retry = volume_info->retry;
2459                 tcon->nocase = volume_info->nocase;
2460                 tcon->local_lease = volume_info->local_lease;
2461         }
2462         if (pSesInfo) {
2463                 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
2464                         sb->s_maxbytes = (u64) 1 << 63;
2465                 } else
2466                         sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
2467         }
2468
2469         /* BB FIXME fix time_gran to be larger for LANMAN sessions */
2470         sb->s_time_gran = 100;
2471
2472         if (rc)
2473                 goto remote_path_check;
2474
2475         cifs_sb->tcon = tcon;
2476
2477         /* do not care if following two calls succeed - informational */
2478         if (!tcon->ipc) {
2479                 CIFSSMBQFSDeviceInfo(xid, tcon);
2480                 CIFSSMBQFSAttributeInfo(xid, tcon);
2481         }
2482
2483         /* tell server which Unix caps we support */
2484         if (tcon->ses->capabilities & CAP_UNIX)
2485                 /* reset of caps checks mount to see if unix extensions
2486                    disabled for just this mount */
2487                 reset_cifs_unix_caps(xid, tcon, sb, volume_info);
2488         else
2489                 tcon->unix_ext = 0; /* server does not support them */
2490
2491         /* convert forward to back slashes in prepath here if needed */
2492         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2493                 convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb));
2494
2495         if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2496                 cifs_sb->rsize = 1024 * 127;
2497                 cFYI(DBG2, ("no very large read support, rsize now 127K"));
2498         }
2499         if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2500                 cifs_sb->wsize = min(cifs_sb->wsize,
2501                                (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2502         if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2503                 cifs_sb->rsize = min(cifs_sb->rsize,
2504                                (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2505
2506 remote_path_check:
2507         /* check if a whole path (including prepath) is not remote */
2508         if (!rc && cifs_sb->prepathlen && tcon) {
2509                 /* build_path_to_root works only when we have a valid tcon */
2510                 full_path = cifs_build_path_to_root(cifs_sb);
2511                 if (full_path == NULL) {
2512                         rc = -ENOMEM;
2513                         goto mount_fail_check;
2514                 }
2515                 rc = is_path_accessible(xid, tcon, cifs_sb, full_path);
2516                 if (rc != -EREMOTE) {
2517                         kfree(full_path);
2518                         goto mount_fail_check;
2519                 }
2520                 kfree(full_path);
2521         }
2522
2523         /* get referral if needed */
2524         if (rc == -EREMOTE) {
2525 #ifdef CONFIG_CIFS_DFS_UPCALL
2526                 /* convert forward to back slashes in prepath here if needed */
2527                 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2528                         convert_delimiter(cifs_sb->prepath,
2529                                         CIFS_DIR_SEP(cifs_sb));
2530                 full_path = build_unc_path_to_root(volume_info, cifs_sb);
2531                 if (IS_ERR(full_path)) {
2532                         rc = PTR_ERR(full_path);
2533                         goto mount_fail_check;
2534                 }
2535
2536                 cFYI(1, ("Getting referral for: %s", full_path));
2537                 rc = get_dfs_path(xid, pSesInfo , full_path + 1,
2538                         cifs_sb->local_nls, &num_referrals, &referrals,
2539                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
2540                 if (!rc && num_referrals > 0) {
2541                         char *fake_devname = NULL;
2542
2543                         if (mount_data != mount_data_global)
2544                                 kfree(mount_data);
2545                         mount_data = cifs_compose_mount_options(
2546                                         cifs_sb->mountdata, full_path + 1,
2547                                         referrals, &fake_devname);
2548                         kfree(fake_devname);
2549                         free_dfs_info_array(referrals, num_referrals);
2550
2551                         if (tcon)
2552                                 cifs_put_tcon(tcon);
2553                         else if (pSesInfo)
2554                                 cifs_put_smb_ses(pSesInfo);
2555
2556                         cleanup_volume_info(&volume_info);
2557                         FreeXid(xid);
2558                         kfree(full_path);
2559                         goto try_mount_again;
2560                 }
2561 #else /* No DFS support, return error on mount */
2562                 rc = -EOPNOTSUPP;
2563 #endif
2564         }
2565
2566 mount_fail_check:
2567         /* on error free sesinfo and tcon struct if needed */
2568         if (rc) {
2569                 if (mount_data != mount_data_global)
2570                         kfree(mount_data);
2571                 /* If find_unc succeeded then rc == 0 so we can not end */
2572                 /* up accidently freeing someone elses tcon struct */
2573                 if (tcon)
2574                         cifs_put_tcon(tcon);
2575                 else if (pSesInfo)
2576                         cifs_put_smb_ses(pSesInfo);
2577                 else
2578                         cifs_put_tcp_session(srvTcp);
2579                 goto out;
2580         }
2581
2582         /* volume_info->password is freed above when existing session found
2583         (in which case it is not needed anymore) but when new sesion is created
2584         the password ptr is put in the new session structure (in which case the
2585         password will be freed at unmount time) */
2586 out:
2587         /* zero out password before freeing */
2588         cleanup_volume_info(&volume_info);
2589         FreeXid(xid);
2590         return rc;
2591 }
2592
2593 static int
2594 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2595               char session_key[CIFS_SESS_KEY_SIZE],
2596               const struct nls_table *nls_codepage)
2597 {
2598         struct smb_hdr *smb_buffer;
2599         struct smb_hdr *smb_buffer_response;
2600         SESSION_SETUP_ANDX *pSMB;
2601         SESSION_SETUP_ANDX *pSMBr;
2602         char *bcc_ptr;
2603         char *user;
2604         char *domain;
2605         int rc = 0;
2606         int remaining_words = 0;
2607         int bytes_returned = 0;
2608         int len;
2609         __u32 capabilities;
2610         __u16 count;
2611
2612         cFYI(1, ("In sesssetup"));
2613         if (ses == NULL)
2614                 return -EINVAL;
2615         user = ses->userName;
2616         domain = ses->domainName;
2617         smb_buffer = cifs_buf_get();
2618
2619         if (smb_buffer == NULL)
2620                 return -ENOMEM;
2621
2622         smb_buffer_response = smb_buffer;
2623         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2624
2625         /* send SMBsessionSetup here */
2626         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2627                         NULL /* no tCon exists yet */ , 13 /* wct */ );
2628
2629         smb_buffer->Mid = GetNextMid(ses->server);
2630         pSMB->req_no_secext.AndXCommand = 0xFF;
2631         pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2632         pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2633
2634         if (ses->server->secMode &
2635                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2636                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2637
2638         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2639                 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2640         if (ses->capabilities & CAP_UNICODE) {
2641                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2642                 capabilities |= CAP_UNICODE;
2643         }
2644         if (ses->capabilities & CAP_STATUS32) {
2645                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2646                 capabilities |= CAP_STATUS32;
2647         }
2648         if (ses->capabilities & CAP_DFS) {
2649                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2650                 capabilities |= CAP_DFS;
2651         }
2652         pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2653
2654         pSMB->req_no_secext.CaseInsensitivePasswordLength =
2655                 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2656
2657         pSMB->req_no_secext.CaseSensitivePasswordLength =
2658             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2659         bcc_ptr = pByteArea(smb_buffer);
2660         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2661         bcc_ptr += CIFS_SESS_KEY_SIZE;
2662         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2663         bcc_ptr += CIFS_SESS_KEY_SIZE;
2664
2665         if (ses->capabilities & CAP_UNICODE) {
2666                 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2667                         *bcc_ptr = 0;
2668                         bcc_ptr++;
2669                 }
2670                 if (user == NULL)
2671                         bytes_returned = 0; /* skip null user */
2672                 else
2673                         bytes_returned =
2674                                 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2675                                         nls_codepage);
2676                 /* convert number of 16 bit words to bytes */
2677                 bcc_ptr += 2 * bytes_returned;
2678                 bcc_ptr += 2;   /* trailing null */
2679                 if (domain == NULL)
2680                         bytes_returned =
2681                             cifs_strtoUCS((__le16 *) bcc_ptr,
2682                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2683                 else
2684                         bytes_returned =
2685                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2686                                           nls_codepage);
2687                 bcc_ptr += 2 * bytes_returned;
2688                 bcc_ptr += 2;
2689                 bytes_returned =
2690                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2691                                   32, nls_codepage);
2692                 bcc_ptr += 2 * bytes_returned;
2693                 bytes_returned =
2694                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release,
2695                                   32, nls_codepage);
2696                 bcc_ptr += 2 * bytes_returned;
2697                 bcc_ptr += 2;
2698                 bytes_returned =
2699                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2700                                   64, nls_codepage);
2701                 bcc_ptr += 2 * bytes_returned;
2702                 bcc_ptr += 2;
2703         } else {
2704                 if (user != NULL) {
2705                     strncpy(bcc_ptr, user, 200);
2706                     bcc_ptr += strnlen(user, 200);
2707                 }
2708                 *bcc_ptr = 0;
2709                 bcc_ptr++;
2710                 if (domain == NULL) {
2711                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2712                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2713                 } else {
2714                         strncpy(bcc_ptr, domain, 64);
2715                         bcc_ptr += strnlen(domain, 64);
2716                         *bcc_ptr = 0;
2717                         bcc_ptr++;
2718                 }
2719                 strcpy(bcc_ptr, "Linux version ");
2720                 bcc_ptr += strlen("Linux version ");
2721                 strcpy(bcc_ptr, utsname()->release);
2722                 bcc_ptr += strlen(utsname()->release) + 1;
2723                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2724                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2725         }
2726         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2727         smb_buffer->smb_buf_length += count;
2728         pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2729
2730         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2731                          &bytes_returned, CIFS_LONG_OP);
2732         if (rc) {
2733 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2734         } else if ((smb_buffer_response->WordCount == 3)
2735                    || (smb_buffer_response->WordCount == 4)) {
2736                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2737                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2738                 if (action & GUEST_LOGIN)
2739                         cFYI(1, ("Guest login")); /* BB mark SesInfo struct? */
2740                 ses->Suid = smb_buffer_response->Uid; /* UID left in wire format
2741                                                          (little endian) */
2742                 cFYI(1, ("UID = %d ", ses->Suid));
2743         /* response can have either 3 or 4 word count - Samba sends 3 */
2744                 bcc_ptr = pByteArea(smb_buffer_response);
2745                 if ((pSMBr->resp.hdr.WordCount == 3)
2746                     || ((pSMBr->resp.hdr.WordCount == 4)
2747                         && (blob_len < pSMBr->resp.ByteCount))) {
2748                         if (pSMBr->resp.hdr.WordCount == 4)
2749                                 bcc_ptr += blob_len;
2750
2751                         if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2752                                 if ((long) (bcc_ptr) % 2) {
2753                                         remaining_words =
2754                                             (BCC(smb_buffer_response) - 1) / 2;
2755                                         /* Unicode strings must be word
2756                                            aligned */
2757                                         bcc_ptr++;
2758                                 } else {
2759                                         remaining_words =
2760                                                 BCC(smb_buffer_response) / 2;
2761                                 }
2762                                 len =
2763                                     UniStrnlen((wchar_t *) bcc_ptr,
2764                                                remaining_words - 1);
2765 /* We look for obvious messed up bcc or strings in response so we do not go off
2766    the end since (at least) WIN2K and Windows XP have a major bug in not null
2767    terminating last Unicode string in response  */
2768                                 kfree(ses->serverOS);
2769                                 ses->serverOS = kzalloc(2 * (len + 1),
2770                                                         GFP_KERNEL);
2771                                 if (ses->serverOS == NULL)
2772                                         goto sesssetup_nomem;
2773                                 cifs_strfromUCS_le(ses->serverOS,
2774                                                    (__le16 *)bcc_ptr,
2775                                                    len, nls_codepage);
2776                                 bcc_ptr += 2 * (len + 1);
2777                                 remaining_words -= len + 1;
2778                                 ses->serverOS[2 * len] = 0;
2779                                 ses->serverOS[1 + (2 * len)] = 0;
2780                                 if (remaining_words > 0) {
2781                                         len = UniStrnlen((wchar_t *)bcc_ptr,
2782                                                          remaining_words-1);
2783                                         kfree(ses->serverNOS);
2784                                         ses->serverNOS = kzalloc(2 * (len + 1),
2785                                                                  GFP_KERNEL);
2786                                         if (ses->serverNOS == NULL)
2787                                                 goto sesssetup_nomem;
2788                                         cifs_strfromUCS_le(ses->serverNOS,
2789                                                            (__le16 *)bcc_ptr,
2790                                                            len, nls_codepage);
2791                                         bcc_ptr += 2 * (len + 1);
2792                                         ses->serverNOS[2 * len] = 0;
2793                                         ses->serverNOS[1 + (2 * len)] = 0;
2794                                         if (strncmp(ses->serverNOS,
2795                                                 "NT LAN Manager 4", 16) == 0) {
2796                                                 cFYI(1, ("NT4 server"));
2797                                                 ses->flags |= CIFS_SES_NT4;
2798                                         }
2799                                         remaining_words -= len + 1;
2800                                         if (remaining_words > 0) {
2801                                                 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2802                                 /* last string is not always null terminated
2803                                    (for e.g. for Windows XP & 2000) */
2804                                                 kfree(ses->serverDomain);
2805                                                 ses->serverDomain =
2806                                                     kzalloc(2*(len+1),
2807                                                             GFP_KERNEL);
2808                                                 if (ses->serverDomain == NULL)
2809                                                         goto sesssetup_nomem;
2810                                                 cifs_strfromUCS_le(ses->serverDomain,
2811                                                         (__le16 *)bcc_ptr,
2812                                                         len, nls_codepage);
2813                                                 bcc_ptr += 2 * (len + 1);
2814                                                 ses->serverDomain[2*len] = 0;
2815                                                 ses->serverDomain[1+(2*len)] = 0;
2816                                         } else { /* else no more room so create
2817                                                   dummy domain string */
2818                                                 kfree(ses->serverDomain);
2819                                                 ses->serverDomain =
2820                                                         kzalloc(2, GFP_KERNEL);
2821                                         }
2822                                 } else { /* no room so create dummy domain
2823                                             and NOS string */
2824
2825                                         /* if these kcallocs fail not much we
2826                                            can do, but better to not fail the
2827                                            sesssetup itself */
2828                                         kfree(ses->serverDomain);
2829                                         ses->serverDomain =
2830                                             kzalloc(2, GFP_KERNEL);
2831                                         kfree(ses->serverNOS);
2832                                         ses->serverNOS =
2833                                             kzalloc(2, GFP_KERNEL);
2834                                 }
2835                         } else {        /* ASCII */
2836                                 len = strnlen(bcc_ptr, 1024);
2837                                 if (((long) bcc_ptr + len) - (long)
2838                                     pByteArea(smb_buffer_response)
2839                                             <= BCC(smb_buffer_response)) {
2840                                         kfree(ses->serverOS);
2841                                         ses->serverOS = kzalloc(len + 1,
2842                                                                 GFP_KERNEL);
2843                                         if (ses->serverOS == NULL)
2844                                                 goto sesssetup_nomem;
2845                                         strncpy(ses->serverOS, bcc_ptr, len);
2846
2847                                         bcc_ptr += len;
2848                                         /* null terminate the string */
2849                                         bcc_ptr[0] = 0;
2850                                         bcc_ptr++;
2851
2852                                         len = strnlen(bcc_ptr, 1024);
2853                                         kfree(ses->serverNOS);
2854                                         ses->serverNOS = kzalloc(len + 1,
2855                                                                  GFP_KERNEL);
2856                                         if (ses->serverNOS == NULL)
2857                                                 goto sesssetup_nomem;
2858                                         strncpy(ses->serverNOS, bcc_ptr, len);
2859                                         bcc_ptr += len;
2860                                         bcc_ptr[0] = 0;
2861                                         bcc_ptr++;
2862
2863                                         len = strnlen(bcc_ptr, 1024);
2864                                         kfree(ses->serverDomain);
2865                                         ses->serverDomain = kzalloc(len + 1,
2866                                                                     GFP_KERNEL);
2867                                         if (ses->serverDomain == NULL)
2868                                                 goto sesssetup_nomem;
2869                                         strncpy(ses->serverDomain, bcc_ptr,
2870                                                 len);
2871                                         bcc_ptr += len;
2872                                         bcc_ptr[0] = 0;
2873                                         bcc_ptr++;
2874                                 } else
2875                                         cFYI(1,
2876                                              ("Variable field of length %d "
2877                                                 "extends beyond end of smb ",
2878                                               len));
2879                         }
2880                 } else {
2881                         cERROR(1, ("Security Blob Length extends beyond "
2882                                 "end of SMB"));
2883                 }
2884         } else {
2885                 cERROR(1, ("Invalid Word count %d: ",
2886                         smb_buffer_response->WordCount));
2887                 rc = -EIO;
2888         }
2889 sesssetup_nomem:        /* do not return an error on nomem for the info strings,
2890                            since that could make reconnection harder, and
2891                            reconnection might be needed to free memory */
2892         cifs_buf_release(smb_buffer);
2893
2894         return rc;
2895 }
2896
2897 static int
2898 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2899                               struct cifsSesInfo *ses, bool *pNTLMv2_flag,
2900                               const struct nls_table *nls_codepage)
2901 {
2902         struct smb_hdr *smb_buffer;
2903         struct smb_hdr *smb_buffer_response;
2904         SESSION_SETUP_ANDX *pSMB;
2905         SESSION_SETUP_ANDX *pSMBr;
2906         char *bcc_ptr;
2907         char *domain;
2908         int rc = 0;
2909         int remaining_words = 0;
2910         int bytes_returned = 0;
2911         int len;
2912         int SecurityBlobLength = sizeof(NEGOTIATE_MESSAGE);
2913         PNEGOTIATE_MESSAGE SecurityBlob;
2914         PCHALLENGE_MESSAGE SecurityBlob2;
2915         __u32 negotiate_flags, capabilities;
2916         __u16 count;
2917
2918         cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
2919         if (ses == NULL)
2920                 return -EINVAL;
2921         domain = ses->domainName;
2922         *pNTLMv2_flag = false;
2923         smb_buffer = cifs_buf_get();
2924         if (smb_buffer == NULL) {
2925                 return -ENOMEM;
2926         }
2927         smb_buffer_response = smb_buffer;
2928         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2929         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2930
2931         /* send SMBsessionSetup here */
2932         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2933                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2934
2935         smb_buffer->Mid = GetNextMid(ses->server);
2936         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2937         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2938
2939         pSMB->req.AndXCommand = 0xFF;
2940         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2941         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2942
2943         if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2944                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2945
2946         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2947             CAP_EXTENDED_SECURITY;
2948         if (ses->capabilities & CAP_UNICODE) {
2949                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2950                 capabilities |= CAP_UNICODE;
2951         }
2952         if (ses->capabilities & CAP_STATUS32) {
2953                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2954                 capabilities |= CAP_STATUS32;
2955         }
2956         if (ses->capabilities & CAP_DFS) {
2957                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2958                 capabilities |= CAP_DFS;
2959         }
2960         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2961
2962         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2963         SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2964         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2965         SecurityBlob->MessageType = NtLmNegotiate;
2966         negotiate_flags =
2967             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2968             NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
2969             NTLMSSP_NEGOTIATE_56 |
2970             /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2971         if (sign_CIFS_PDUs)
2972                 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2973 /*      if (ntlmv2_support)
2974                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;*/
2975         /* setup pointers to domain name and workstation name */
2976         bcc_ptr += SecurityBlobLength;
2977
2978         SecurityBlob->WorkstationName.Buffer = 0;
2979         SecurityBlob->WorkstationName.Length = 0;
2980         SecurityBlob->WorkstationName.MaximumLength = 0;
2981
2982         /* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
2983         along with username on auth request (ie the response to challenge) */
2984         SecurityBlob->DomainName.Buffer = 0;
2985         SecurityBlob->DomainName.Length = 0;
2986         SecurityBlob->DomainName.MaximumLength = 0;
2987         if (ses->capabilities & CAP_UNICODE) {
2988                 if ((long) bcc_ptr % 2) {
2989                         *bcc_ptr = 0;
2990                         bcc_ptr++;
2991                 }
2992
2993                 bytes_returned =
2994                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2995                                   32, nls_codepage);
2996                 bcc_ptr += 2 * bytes_returned;
2997                 bytes_returned =
2998                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
2999                                   nls_codepage);
3000                 bcc_ptr += 2 * bytes_returned;
3001                 bcc_ptr += 2;   /* null terminate Linux version */
3002                 bytes_returned =
3003                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
3004                                   64, nls_codepage);
3005                 bcc_ptr += 2 * bytes_returned;
3006                 *(bcc_ptr + 1) = 0;
3007                 *(bcc_ptr + 2) = 0;
3008                 bcc_ptr += 2;   /* null terminate network opsys string */
3009                 *(bcc_ptr + 1) = 0;
3010                 *(bcc_ptr + 2) = 0;
3011                 bcc_ptr += 2;   /* null domain */
3012         } else {                /* ASCII */
3013                 strcpy(bcc_ptr, "Linux version ");
3014                 bcc_ptr += strlen("Linux version ");
3015                 strcpy(bcc_ptr, utsname()->release);
3016                 bcc_ptr += strlen(utsname()->release) + 1;
3017                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
3018                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
3019                 bcc_ptr++;      /* empty domain field */
3020                 *bcc_ptr = 0;
3021         }
3022         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
3023         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
3024         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
3025         smb_buffer->smb_buf_length += count;
3026         pSMB->req.ByteCount = cpu_to_le16(count);
3027
3028         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
3029                          &bytes_returned, CIFS_LONG_OP);
3030
3031         if (smb_buffer_response->Status.CifsError ==
3032             cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
3033                 rc = 0;
3034
3035         if (rc) {
3036 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
3037         } else if ((smb_buffer_response->WordCount == 3)
3038                    || (smb_buffer_response->WordCount == 4)) {
3039                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
3040                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
3041
3042                 if (action & GUEST_LOGIN)
3043                         cFYI(1, ("Guest login"));
3044         /* Do we want to set anything in SesInfo struct when guest login? */
3045
3046                 bcc_ptr = pByteArea(smb_buffer_response);
3047         /* response can have either 3 or 4 word count - Samba sends 3 */
3048
3049                 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
3050                 if (SecurityBlob2->MessageType != NtLmChallenge) {
3051                         cFYI(1, ("Unexpected NTLMSSP message type received %d",
3052                               SecurityBlob2->MessageType));
3053                 } else if (ses) {
3054                         ses->Suid = smb_buffer_response->Uid; /* UID left in le format */
3055                         cFYI(1, ("UID = %d", ses->Suid));
3056                         if ((pSMBr->resp.hdr.WordCount == 3)
3057                             || ((pSMBr->resp.hdr.WordCount == 4)
3058                                 && (blob_len <
3059                                     pSMBr->resp.ByteCount))) {
3060
3061                                 if (pSMBr->resp.hdr.WordCount == 4) {
3062                                         bcc_ptr += blob_len;
3063                                         cFYI(1, ("Security Blob Length %d",
3064                                               blob_len));
3065                                 }
3066
3067                                 cFYI(1, ("NTLMSSP Challenge rcvd"));
3068
3069                                 memcpy(ses->server->cryptKey,
3070                                        SecurityBlob2->Challenge,
3071                                        CIFS_CRYPTO_KEY_SIZE);
3072                                 if (SecurityBlob2->NegotiateFlags &
3073                                         cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
3074                                         *pNTLMv2_flag = true;
3075
3076                                 if ((SecurityBlob2->NegotiateFlags &
3077                                         cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN))
3078                                         || (sign_CIFS_PDUs > 1))
3079                                                 ses->server->secMode |=
3080                                                         SECMODE_SIGN_REQUIRED;
3081                                 if ((SecurityBlob2->NegotiateFlags &
3082                                         cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
3083                                                 ses->server->secMode |=
3084                                                         SECMODE_SIGN_ENABLED;
3085
3086                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3087                                         if ((long) (bcc_ptr) % 2) {
3088                                                 remaining_words =
3089                                                     (BCC(smb_buffer_response)
3090                                                      - 1) / 2;
3091                                          /* Must word align unicode strings */
3092                                                 bcc_ptr++;
3093                                         } else {
3094                                                 remaining_words =
3095                                                     BCC
3096                                                     (smb_buffer_response) / 2;
3097                                         }
3098                                         len =
3099                                             UniStrnlen((wchar_t *) bcc_ptr,
3100                                                        remaining_words - 1);
3101 /* We look for obvious messed up bcc or strings in response so we do not go off
3102    the end since (at least) WIN2K and Windows XP have a major bug in not null
3103    terminating last Unicode string in response  */
3104                                         kfree(ses->serverOS);
3105                                         ses->serverOS =
3106                                             kzalloc(2 * (len + 1), GFP_KERNEL);
3107                                         cifs_strfromUCS_le(ses->serverOS,
3108                                                            (__le16 *)
3109                                                            bcc_ptr, len,
3110                                                            nls_codepage);
3111                                         bcc_ptr += 2 * (len + 1);
3112                                         remaining_words -= len + 1;
3113                                         ses->serverOS[2 * len] = 0;
3114                                         ses->serverOS[1 + (2 * len)] = 0;
3115                                         if (remaining_words > 0) {
3116                                                 len = UniStrnlen((wchar_t *)
3117                                                                  bcc_ptr,
3118                                                                  remaining_words
3119                                                                  - 1);
3120                                                 kfree(ses->serverNOS);
3121                                                 ses->serverNOS =
3122                                                     kzalloc(2 * (len + 1),
3123                                                             GFP_KERNEL);
3124                                                 cifs_strfromUCS_le(ses->
3125                                                                    serverNOS,
3126                                                                    (__le16 *)
3127                                                                    bcc_ptr,
3128                                                                    len,
3129                                                                    nls_codepage);
3130                                                 bcc_ptr += 2 * (len + 1);
3131                                                 ses->serverNOS[2 * len] = 0;
3132                                                 ses->serverNOS[1 +
3133                                                                (2 * len)] = 0;
3134                                                 remaining_words -= len + 1;
3135                                                 if (remaining_words > 0) {
3136                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3137                                 /* last string not always null terminated
3138                                    (for e.g. for Windows XP & 2000) */
3139                                                         kfree(ses->serverDomain);
3140                                                         ses->serverDomain =
3141                                                             kzalloc(2 *
3142                                                                     (len +
3143                                                                      1),
3144                                                                     GFP_KERNEL);
3145                                                         cifs_strfromUCS_le
3146                                                             (ses->serverDomain,
3147                                                              (__le16 *)bcc_ptr,
3148                                                              len, nls_codepage);
3149                                                         bcc_ptr +=
3150                                                             2 * (len + 1);
3151                                                         ses->serverDomain[2*len]
3152                                                             = 0;
3153                                                         ses->serverDomain
3154                                                                 [1 + (2 * len)]
3155                                                             = 0;
3156                                                 } /* else no more room so create dummy domain string */
3157                                                 else {
3158                                                         kfree(ses->serverDomain);
3159                                                         ses->serverDomain =
3160                                                             kzalloc(2,
3161                                                                     GFP_KERNEL);
3162                                                 }
3163                                         } else {        /* no room so create dummy domain and NOS string */
3164                                                 kfree(ses->serverDomain);
3165                                                 ses->serverDomain =
3166                                                     kzalloc(2, GFP_KERNEL);
3167                                                 kfree(ses->serverNOS);
3168                                                 ses->serverNOS =
3169                                                     kzalloc(2, GFP_KERNEL);
3170                                         }
3171                                 } else {        /* ASCII */
3172                                         len = strnlen(bcc_ptr, 1024);
3173                                         if (((long) bcc_ptr + len) - (long)
3174                                             pByteArea(smb_buffer_response)
3175                                             <= BCC(smb_buffer_response)) {
3176                                                 kfree(ses->serverOS);
3177                                                 ses->serverOS =
3178                                                     kzalloc(len + 1,
3179                                                             GFP_KERNEL);
3180                                                 strncpy(ses->serverOS,
3181                                                         bcc_ptr, len);
3182
3183                                                 bcc_ptr += len;
3184                                                 bcc_ptr[0] = 0; /* null terminate string */
3185                                                 bcc_ptr++;
3186
3187                                                 len = strnlen(bcc_ptr, 1024);
3188                                                 kfree(ses->serverNOS);
3189                                                 ses->serverNOS =
3190                                                     kzalloc(len + 1,
3191                                                             GFP_KERNEL);
3192                                                 strncpy(ses->serverNOS, bcc_ptr, len);
3193                                                 bcc_ptr += len;
3194                                                 bcc_ptr[0] = 0;
3195                                                 bcc_ptr++;
3196
3197                                                 len = strnlen(bcc_ptr, 1024);
3198                                                 kfree(ses->serverDomain);
3199                                                 ses->serverDomain =
3200                                                     kzalloc(len + 1,
3201                                                             GFP_KERNEL);
3202                                                 strncpy(ses->serverDomain,
3203                                                         bcc_ptr, len);
3204                                                 bcc_ptr += len;
3205                                                 bcc_ptr[0] = 0;
3206                                                 bcc_ptr++;
3207                                         } else
3208                                                 cFYI(1,
3209                                                      ("field of length %d "
3210                                                     "extends beyond end of smb",
3211                                                       len));
3212                                 }
3213                         } else {
3214                                 cERROR(1, ("Security Blob Length extends beyond"
3215                                            " end of SMB"));
3216                         }
3217                 } else {
3218                         cERROR(1, ("No session structure passed in."));
3219                 }
3220         } else {
3221                 cERROR(1, ("Invalid Word count %d:",
3222                         smb_buffer_response->WordCount));
3223                 rc = -EIO;
3224         }
3225
3226         cifs_buf_release(smb_buffer);
3227
3228         return rc;
3229 }
3230 static int
3231 CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
3232                         char *ntlm_session_key, bool ntlmv2_flag,
3233                         const struct nls_table *nls_codepage)
3234 {
3235         struct smb_hdr *smb_buffer;
3236         struct smb_hdr *smb_buffer_response;
3237         SESSION_SETUP_ANDX *pSMB;
3238         SESSION_SETUP_ANDX *pSMBr;
3239         char *bcc_ptr;
3240         char *user;
3241         char *domain;
3242         int rc = 0;
3243         int remaining_words = 0;
3244         int bytes_returned = 0;
3245         int len;
3246         int SecurityBlobLength = sizeof(AUTHENTICATE_MESSAGE);
3247         PAUTHENTICATE_MESSAGE SecurityBlob;
3248         __u32 negotiate_flags, capabilities;
3249         __u16 count;
3250
3251         cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
3252         if (ses == NULL)
3253                 return -EINVAL;
3254         user = ses->userName;
3255         domain = ses->domainName;
3256         smb_buffer = cifs_buf_get();
3257         if (smb_buffer == NULL) {
3258                 return -ENOMEM;
3259         }
3260         smb_buffer_response = smb_buffer;
3261         pSMB = (SESSION_SETUP_ANDX *)smb_buffer;
3262         pSMBr = (SESSION_SETUP_ANDX *)smb_buffer_response;
3263
3264         /* send SMBsessionSetup here */
3265         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
3266                         NULL /* no tCon exists yet */ , 12 /* wct */ );
3267
3268         smb_buffer->Mid = GetNextMid(ses->server);
3269         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
3270         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
3271         pSMB->req.AndXCommand = 0xFF;
3272         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
3273         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
3274
3275         pSMB->req.hdr.Uid = ses->Suid;
3276
3277         if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3278                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3279
3280         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
3281                         CAP_EXTENDED_SECURITY;
3282         if (ses->capabilities & CAP_UNICODE) {
3283                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3284                 capabilities |= CAP_UNICODE;
3285         }
3286         if (ses->capabilities & CAP_STATUS32) {
3287                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3288                 capabilities |= CAP_STATUS32;
3289         }
3290         if (ses->capabilities & CAP_DFS) {
3291                 smb_buffer->Flags2 |= SMBFLG2_DFS;
3292                 capabilities |= CAP_DFS;
3293         }
3294         pSMB->req.Capabilities = cpu_to_le32(capabilities);
3295
3296         bcc_ptr = (char *)&pSMB->req.SecurityBlob;
3297         SecurityBlob = (PAUTHENTICATE_MESSAGE)bcc_ptr;
3298         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
3299         SecurityBlob->MessageType = NtLmAuthenticate;
3300         bcc_ptr += SecurityBlobLength;
3301         negotiate_flags = NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
3302                         NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
3303                         0x80000000 | NTLMSSP_NEGOTIATE_128;
3304         if (sign_CIFS_PDUs)
3305                 negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
3306         if (ntlmv2_flag)
3307                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
3308
3309 /* setup pointers to domain name and workstation name */
3310
3311         SecurityBlob->WorkstationName.Buffer = 0;
3312         SecurityBlob->WorkstationName.Length = 0;
3313         SecurityBlob->WorkstationName.MaximumLength = 0;
3314         SecurityBlob->SessionKey.Length = 0;
3315         SecurityBlob->SessionKey.MaximumLength = 0;
3316         SecurityBlob->SessionKey.Buffer = 0;
3317
3318         SecurityBlob->LmChallengeResponse.Length = 0;
3319         SecurityBlob->LmChallengeResponse.MaximumLength = 0;
3320         SecurityBlob->LmChallengeResponse.Buffer = 0;
3321
3322         SecurityBlob->NtChallengeResponse.Length =
3323             cpu_to_le16(CIFS_SESS_KEY_SIZE);
3324         SecurityBlob->NtChallengeResponse.MaximumLength =
3325             cpu_to_le16(CIFS_SESS_KEY_SIZE);
3326         memcpy(bcc_ptr, ntlm_session_key, CIFS_SESS_KEY_SIZE);
3327         SecurityBlob->NtChallengeResponse.Buffer =
3328             cpu_to_le32(SecurityBlobLength);
3329         SecurityBlobLength += CIFS_SESS_KEY_SIZE;
3330         bcc_ptr += CIFS_SESS_KEY_SIZE;
3331
3332         if (ses->capabilities & CAP_UNICODE) {
3333                 if (domain == NULL) {
3334                         SecurityBlob->DomainName.Buffer = 0;
3335                         SecurityBlob->DomainName.Length = 0;
3336                         SecurityBlob->DomainName.MaximumLength = 0;
3337                 } else {
3338                         __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
3339                                           nls_codepage);
3340                         ln *= 2;
3341                         SecurityBlob->DomainName.MaximumLength =
3342                             cpu_to_le16(ln);
3343                         SecurityBlob->DomainName.Buffer =
3344                             cpu_to_le32(SecurityBlobLength);
3345                         bcc_ptr += ln;
3346                         SecurityBlobLength += ln;
3347                         SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3348                 }
3349                 if (user == NULL) {
3350                         SecurityBlob->UserName.Buffer = 0;
3351                         SecurityBlob->UserName.Length = 0;
3352                         SecurityBlob->UserName.MaximumLength = 0;
3353                 } else {
3354                         __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
3355                                           nls_codepage);
3356                         ln *= 2;
3357                         SecurityBlob->UserName.MaximumLength =
3358                             cpu_to_le16(ln);
3359                         SecurityBlob->UserName.Buffer =
3360                             cpu_to_le32(SecurityBlobLength);
3361                         bcc_ptr += ln;
3362                         SecurityBlobLength += ln;
3363                         SecurityBlob->UserName.Length = cpu_to_le16(ln);
3364                 }
3365
3366                 /* SecurityBlob->WorkstationName.Length =
3367                  cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
3368                    SecurityBlob->WorkstationName.Length *= 2;
3369                    SecurityBlob->WorkstationName.MaximumLength =
3370                         cpu_to_le16(SecurityBlob->WorkstationName.Length);
3371                    SecurityBlob->WorkstationName.Buffer =
3372                                  cpu_to_le32(SecurityBlobLength);
3373                    bcc_ptr += SecurityBlob->WorkstationName.Length;
3374                    SecurityBlobLength += SecurityBlob->WorkstationName.Length;
3375                    SecurityBlob->WorkstationName.Length =
3376                         cpu_to_le16(SecurityBlob->WorkstationName.Length);  */
3377
3378                 if ((long) bcc_ptr % 2) {
3379                         *bcc_ptr = 0;
3380                         bcc_ptr++;
3381                 }
3382                 bytes_returned =
3383                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
3384                                   32, nls_codepage);
3385                 bcc_ptr += 2 * bytes_returned;
3386                 bytes_returned =
3387                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
3388                                   nls_codepage);
3389                 bcc_ptr += 2 * bytes_returned;
3390                 bcc_ptr += 2;   /* null term version string */
3391                 bytes_returned =
3392                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
3393                                   64, nls_codepage);
3394                 bcc_ptr += 2 * bytes_returned;
3395                 *(bcc_ptr + 1) = 0;
3396                 *(bcc_ptr + 2) = 0;
3397                 bcc_ptr += 2;   /* null terminate network opsys string */
3398                 *(bcc_ptr + 1) = 0;
3399                 *(bcc_ptr + 2) = 0;
3400                 bcc_ptr += 2;   /* null domain */
3401         } else {                /* ASCII */
3402                 if (domain == NULL) {
3403                         SecurityBlob->DomainName.Buffer = 0;
3404                         SecurityBlob->DomainName.Length = 0;
3405                         SecurityBlob->DomainName.MaximumLength = 0;
3406                 } else {
3407                         __u16 ln;
3408                         negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
3409                         strncpy(bcc_ptr, domain, 63);
3410                         ln = strnlen(domain, 64);
3411                         SecurityBlob->DomainName.MaximumLength =
3412                             cpu_to_le16(ln);
3413                         SecurityBlob->DomainName.Buffer =
3414                             cpu_to_le32(SecurityBlobLength);
3415                         bcc_ptr += ln;
3416                         SecurityBlobLength += ln;
3417                         SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3418                 }
3419                 if (user == NULL) {
3420                         SecurityBlob->UserName.Buffer = 0;
3421                         SecurityBlob->UserName.Length = 0;
3422                         SecurityBlob->UserName.MaximumLength = 0;
3423                 } else {
3424                         __u16 ln;
3425                         strncpy(bcc_ptr, user, 63);
3426                         ln = strnlen(user, 64);
3427                         SecurityBlob->UserName.MaximumLength = cpu_to_le16(ln);
3428                         SecurityBlob->UserName.Buffer =
3429                                                 cpu_to_le32(SecurityBlobLength);
3430                         bcc_ptr += ln;
3431                         SecurityBlobLength += ln;
3432                         SecurityBlob->UserName.Length = cpu_to_le16(ln);
3433                 }
3434                 /* BB fill in our workstation name if known BB */
3435
3436                 strcpy(bcc_ptr, "Linux version ");
3437                 bcc_ptr += strlen("Linux version ");
3438                 strcpy(bcc_ptr, utsname()->release);
3439                 bcc_ptr += strlen(utsname()->release) + 1;
3440                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
3441                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
3442                 bcc_ptr++;      /* null domain */
3443                 *bcc_ptr = 0;
3444         }
3445         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
3446         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
3447         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
3448         smb_buffer->smb_buf_length += count;
3449         pSMB->req.ByteCount = cpu_to_le16(count);
3450
3451         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
3452                          &bytes_returned, CIFS_LONG_OP);
3453         if (rc) {
3454 /*   rc = map_smb_to_linux_error(smb_buffer_response) done in SendReceive now */
3455         } else if ((smb_buffer_response->WordCount == 3) ||
3456                    (smb_buffer_response->WordCount == 4)) {
3457                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
3458                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
3459                 if (action & GUEST_LOGIN)
3460                         cFYI(1, ("Guest login")); /* BB Should we set anything
3461                                                          in SesInfo struct ? */
3462 /*              if (SecurityBlob2->MessageType != NtLm??) {
3463                         cFYI("Unexpected message type on auth response is %d"));
3464                 } */
3465
3466                 if (ses) {
3467                         cFYI(1,
3468                              ("Check challenge UID %d vs auth response UID %d",
3469                               ses->Suid, smb_buffer_response->Uid));
3470                         /* UID left in wire format */
3471                         ses->Suid = smb_buffer_response->Uid;
3472                         bcc_ptr = pByteArea(smb_buffer_response);
3473                 /* response can have either 3 or 4 word count - Samba sends 3 */
3474                         if ((pSMBr->resp.hdr.WordCount == 3)
3475                             || ((pSMBr->resp.hdr.WordCount == 4)
3476                                 && (blob_len <
3477                                     pSMBr->resp.ByteCount))) {
3478                                 if (pSMBr->resp.hdr.WordCount == 4) {
3479                                         bcc_ptr +=
3480                                             blob_len;
3481                                         cFYI(1,
3482                                              ("Security Blob Length %d ",
3483                                               blob_len));
3484                                 }
3485
3486                                 cFYI(1,
3487                                      ("NTLMSSP response to Authenticate "));
3488
3489                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3490                                         if ((long) (bcc_ptr) % 2) {
3491                                                 remaining_words =
3492                                                     (BCC(smb_buffer_response)
3493                                                      - 1) / 2;
3494                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
3495                                         } else {
3496                                                 remaining_words = BCC(smb_buffer_response) / 2;
3497                                         }
3498                                         len = UniStrnlen((wchar_t *) bcc_ptr,
3499                                                         remaining_words - 1);
3500 /* We look for obvious messed up bcc or strings in response so we do not go off
3501   the end since (at least) WIN2K and Windows XP have a major bug in not null
3502   terminating last Unicode string in response  */
3503                                         kfree(ses->serverOS);
3504                                         ses->serverOS =
3505                                             kzalloc(2 * (len + 1), GFP_KERNEL);
3506                                         cifs_strfromUCS_le(ses->serverOS,
3507                                                            (__le16 *)
3508                                                            bcc_ptr, len,
3509                                                            nls_codepage);
3510                                         bcc_ptr += 2 * (len + 1);
3511                                         remaining_words -= len + 1;
3512                                         ses->serverOS[2 * len] = 0;
3513                                         ses->serverOS[1 + (2 * len)] = 0;
3514                                         if (remaining_words > 0) {
3515                                                 len = UniStrnlen((wchar_t *)
3516                                                                  bcc_ptr,
3517                                                                  remaining_words
3518                                                                  - 1);
3519                                                 kfree(ses->serverNOS);
3520                                                 ses->serverNOS =
3521                                                     kzalloc(2 * (len + 1),
3522                                                             GFP_KERNEL);
3523                                                 cifs_strfromUCS_le(ses->
3524                                                                    serverNOS,
3525                                                                    (__le16 *)
3526                                                                    bcc_ptr,
3527                                                                    len,
3528                                                                    nls_codepage);
3529                                                 bcc_ptr += 2 * (len + 1);
3530                                                 ses->serverNOS[2 * len] = 0;
3531                                                 ses->serverNOS[1+(2*len)] = 0;
3532                                                 remaining_words -= len + 1;
3533                                                 if (remaining_words > 0) {
3534                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3535      /* last string not always null terminated (e.g. for Windows XP & 2000) */
3536                                                         kfree(ses->serverDomain);
3537                                                         ses->serverDomain =
3538                                                             kzalloc(2 *
3539                                                                     (len +
3540                                                                      1),
3541                                                                     GFP_KERNEL);
3542                                                         cifs_strfromUCS_le
3543                                                             (ses->
3544                                                              serverDomain,
3545                                                              (__le16 *)
3546                                                              bcc_ptr, len,
3547                                                              nls_codepage);
3548                                                         bcc_ptr +=
3549                                                             2 * (len + 1);
3550                                                         ses->
3551                                                             serverDomain[2
3552                                                                          * len]
3553                                                             = 0;
3554                                                         ses->
3555                                                             serverDomain[1
3556                                                                          +
3557                                                                          (2
3558                                                                           *
3559                                                                           len)]
3560                                                             = 0;
3561                                                 } /* else no more room so create dummy domain string */
3562                                                 else {
3563                                                         kfree(ses->serverDomain);
3564                                                         ses->serverDomain = kzalloc(2,GFP_KERNEL);
3565                                                 }
3566                                         } else {  /* no room so create dummy domain and NOS string */
3567                                                 kfree(ses->serverDomain);
3568                                                 ses->serverDomain = kzalloc(2, GFP_KERNEL);
3569                                                 kfree(ses->serverNOS);
3570                                                 ses->serverNOS = kzalloc(2, GFP_KERNEL);
3571                                         }
3572                                 } else {        /* ASCII */
3573                                         len = strnlen(bcc_ptr, 1024);
3574                                         if (((long) bcc_ptr + len) -
3575                                            (long) pByteArea(smb_buffer_response)
3576                                                 <= BCC(smb_buffer_response)) {
3577                                                 kfree(ses->serverOS);
3578                                                 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
3579                                                 strncpy(ses->serverOS,bcc_ptr, len);
3580
3581                                                 bcc_ptr += len;
3582                                                 bcc_ptr[0] = 0; /* null terminate the string */
3583                                                 bcc_ptr++;
3584
3585                                                 len = strnlen(bcc_ptr, 1024);
3586                                                 kfree(ses->serverNOS);
3587                                                 ses->serverNOS = kzalloc(len+1,
3588                                                                     GFP_KERNEL);
3589                                                 strncpy(ses->serverNOS,
3590                                                         bcc_ptr, len);
3591                                                 bcc_ptr += len;
3592                                                 bcc_ptr[0] = 0;
3593                                                 bcc_ptr++;
3594
3595                                                 len = strnlen(bcc_ptr, 1024);
3596                                                 kfree(ses->serverDomain);
3597                                                 ses->serverDomain =
3598                                                                 kzalloc(len+1,
3599                                                                     GFP_KERNEL);
3600                                                 strncpy(ses->serverDomain,
3601                                                         bcc_ptr, len);
3602                                                 bcc_ptr += len;
3603                                                 bcc_ptr[0] = 0;
3604                                                 bcc_ptr++;
3605                                         } else
3606                                                 cFYI(1, ("field of length %d "
3607                                                    "extends beyond end of smb ",
3608                                                       len));
3609                                 }
3610                         } else {
3611                                 cERROR(1, ("Security Blob extends beyond end "
3612                                         "of SMB"));
3613                         }
3614                 } else {
3615                         cERROR(1, ("No session structure passed in."));
3616                 }
3617         } else {
3618                 cERROR(1, ("Invalid Word count %d: ",
3619                         smb_buffer_response->WordCount));
3620                 rc = -EIO;
3621         }
3622
3623         cifs_buf_release(smb_buffer);
3624
3625         return rc;
3626 }
3627
3628 int
3629 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
3630          const char *tree, struct cifsTconInfo *tcon,
3631          const struct nls_table *nls_codepage)
3632 {
3633         struct smb_hdr *smb_buffer;
3634         struct smb_hdr *smb_buffer_response;
3635         TCONX_REQ *pSMB;
3636         TCONX_RSP *pSMBr;
3637         unsigned char *bcc_ptr;
3638         int rc = 0;
3639         int length;
3640         __u16 count;
3641
3642         if (ses == NULL)
3643                 return -EIO;
3644
3645         smb_buffer = cifs_buf_get();
3646         if (smb_buffer == NULL) {
3647                 return -ENOMEM;
3648         }
3649         smb_buffer_response = smb_buffer;
3650
3651         header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3652                         NULL /*no tid */ , 4 /*wct */ );
3653
3654         smb_buffer->Mid = GetNextMid(ses->server);
3655         smb_buffer->Uid = ses->Suid;
3656         pSMB = (TCONX_REQ *) smb_buffer;
3657         pSMBr = (TCONX_RSP *) smb_buffer_response;
3658
3659         pSMB->AndXCommand = 0xFF;
3660         pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3661         bcc_ptr = &pSMB->Password[0];
3662         if ((ses->server->secMode) & SECMODE_USER) {
3663                 pSMB->PasswordLength = cpu_to_le16(1);  /* minimum */
3664                 *bcc_ptr = 0; /* password is null byte */
3665                 bcc_ptr++;              /* skip password */
3666                 /* already aligned so no need to do it below */
3667         } else {
3668                 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
3669                 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3670                    specified as required (when that support is added to
3671                    the vfs in the future) as only NTLM or the much
3672                    weaker LANMAN (which we do not send by default) is accepted
3673                    by Samba (not sure whether other servers allow
3674                    NTLMv2 password here) */
3675 #ifdef CONFIG_CIFS_WEAK_PW_HASH
3676                 if ((extended_security & CIFSSEC_MAY_LANMAN) &&
3677                     (ses->server->secType == LANMAN))
3678                         calc_lanman_hash(tcon->password, ses->server->cryptKey,
3679                                          ses->server->secMode &
3680                                             SECMODE_PW_ENCRYPT ? true : false,
3681                                          bcc_ptr);
3682                 else
3683 #endif /* CIFS_WEAK_PW_HASH */
3684                 SMBNTencrypt(tcon->password, ses->server->cryptKey,
3685                              bcc_ptr);
3686
3687                 bcc_ptr += CIFS_SESS_KEY_SIZE;
3688                 if (ses->capabilities & CAP_UNICODE) {
3689                         /* must align unicode strings */
3690                         *bcc_ptr = 0; /* null byte password */
3691                         bcc_ptr++;
3692                 }
3693         }
3694
3695         if (ses->server->secMode &
3696                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3697                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3698
3699         if (ses->capabilities & CAP_STATUS32) {
3700                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3701         }
3702         if (ses->capabilities & CAP_DFS) {
3703                 smb_buffer->Flags2 |= SMBFLG2_DFS;
3704         }
3705         if (ses->capabilities & CAP_UNICODE) {
3706                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3707                 length =
3708                     cifs_strtoUCS((__le16 *) bcc_ptr, tree,
3709                         6 /* max utf8 char length in bytes */ *
3710                         (/* server len*/ + 256 /* share len */), nls_codepage);
3711                 bcc_ptr += 2 * length;  /* convert num 16 bit words to bytes */
3712                 bcc_ptr += 2;   /* skip trailing null */
3713         } else {                /* ASCII */
3714                 strcpy(bcc_ptr, tree);
3715                 bcc_ptr += strlen(tree) + 1;
3716         }
3717         strcpy(bcc_ptr, "?????");
3718         bcc_ptr += strlen("?????");
3719         bcc_ptr += 1;
3720         count = bcc_ptr - &pSMB->Password[0];
3721         pSMB->hdr.smb_buf_length += count;
3722         pSMB->ByteCount = cpu_to_le16(count);
3723
3724         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
3725                          CIFS_STD_OP);
3726
3727         /* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
3728         /* above now done in SendReceive */
3729         if ((rc == 0) && (tcon != NULL)) {
3730                 tcon->tidStatus = CifsGood;
3731                 tcon->need_reconnect = false;
3732                 tcon->tid = smb_buffer_response->Tid;
3733                 bcc_ptr = pByteArea(smb_buffer_response);
3734                 length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
3735                 /* skip service field (NB: this field is always ASCII) */
3736                 if (length == 3) {
3737                         if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3738                             (bcc_ptr[2] == 'C')) {
3739                                 cFYI(1, ("IPC connection"));
3740                                 tcon->ipc = 1;
3741                         }
3742                 } else if (length == 2) {
3743                         if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3744                                 /* the most common case */
3745                                 cFYI(1, ("disk share connection"));
3746                         }
3747                 }
3748                 bcc_ptr += length + 1;
3749                 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3750                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3751                         length = UniStrnlen((wchar_t *) bcc_ptr, 512);
3752                         if ((bcc_ptr + (2 * length)) -
3753                              pByteArea(smb_buffer_response) <=
3754                             BCC(smb_buffer_response)) {
3755                                 kfree(tcon->nativeFileSystem);
3756                                 tcon->nativeFileSystem =
3757                                     kzalloc(2*(length + 1), GFP_KERNEL);
3758                                 if (tcon->nativeFileSystem)
3759                                         cifs_strfromUCS_le(
3760                                                 tcon->nativeFileSystem,
3761                                                 (__le16 *) bcc_ptr,
3762                                                 length, nls_codepage);
3763                                 bcc_ptr += 2 * length;
3764                                 bcc_ptr[0] = 0; /* null terminate the string */
3765                                 bcc_ptr[1] = 0;
3766                                 bcc_ptr += 2;
3767                         }
3768                         /* else do not bother copying these information fields*/
3769                 } else {
3770                         length = strnlen(bcc_ptr, 1024);
3771                         if ((bcc_ptr + length) -
3772                             pByteArea(smb_buffer_response) <=
3773                             BCC(smb_buffer_response)) {
3774                                 kfree(tcon->nativeFileSystem);
3775                                 tcon->nativeFileSystem =
3776                                     kzalloc(length + 1, GFP_KERNEL);
3777                                 if (tcon->nativeFileSystem)
3778                                         strncpy(tcon->nativeFileSystem, bcc_ptr,
3779                                                 length);
3780                         }
3781                         /* else do not bother copying these information fields*/
3782                 }
3783                 if ((smb_buffer_response->WordCount == 3) ||
3784                          (smb_buffer_response->WordCount == 7))
3785                         /* field is in same location */
3786                         tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3787                 else
3788                         tcon->Flags = 0;
3789                 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
3790         } else if ((rc == 0) && tcon == NULL) {
3791                 /* all we need to save for IPC$ connection */
3792                 ses->ipc_tid = smb_buffer_response->Tid;
3793         }
3794
3795         cifs_buf_release(smb_buffer);
3796         return rc;
3797 }
3798
3799 int
3800 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3801 {
3802         int rc = 0;
3803         char *tmp;
3804
3805         if (cifs_sb->tcon)
3806                 cifs_put_tcon(cifs_sb->tcon);
3807
3808         cifs_sb->tcon = NULL;
3809         tmp = cifs_sb->prepath;
3810         cifs_sb->prepathlen = 0;
3811         cifs_sb->prepath = NULL;
3812         kfree(tmp);
3813
3814         return rc;
3815 }
3816
3817 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3818                                            struct nls_table *nls_info)
3819 {
3820         int rc = 0;
3821         char ntlm_session_key[CIFS_SESS_KEY_SIZE];
3822         bool ntlmv2_flag = false;
3823         int first_time = 0;
3824         struct TCP_Server_Info *server = pSesInfo->server;
3825
3826         /* what if server changes its buffer size after dropping the session? */
3827         if (server->maxBuf == 0) /* no need to send on reconnect */ {
3828                 rc = CIFSSMBNegotiate(xid, pSesInfo);
3829                 if (rc == -EAGAIN) {
3830                         /* retry only once on 1st time connection */
3831                         rc = CIFSSMBNegotiate(xid, pSesInfo);
3832                         if (rc == -EAGAIN)
3833                                 rc = -EHOSTDOWN;
3834                 }
3835                 if (rc == 0) {
3836                         spin_lock(&GlobalMid_Lock);
3837                         if (server->tcpStatus != CifsExiting)
3838                                 server->tcpStatus = CifsGood;
3839                         else
3840                                 rc = -EHOSTDOWN;
3841                         spin_unlock(&GlobalMid_Lock);
3842
3843                 }
3844                 first_time = 1;
3845         }
3846
3847         if (rc)
3848                 goto ss_err_exit;
3849
3850         pSesInfo->flags = 0;
3851         pSesInfo->capabilities = server->capabilities;
3852         if (linuxExtEnabled == 0)
3853                 pSesInfo->capabilities &= (~CAP_UNIX);
3854         /*      pSesInfo->sequence_number = 0;*/
3855         cFYI(1, ("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3856                  server->secMode, server->capabilities, server->timeAdj));
3857
3858         if (experimEnabled < 2)
3859                 rc = CIFS_SessSetup(xid, pSesInfo, first_time, nls_info);
3860         else if (extended_security
3861                         && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3862                         && (server->secType == NTLMSSP)) {
3863                 rc = -EOPNOTSUPP;
3864         } else if (extended_security
3865                         && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3866                         && (server->secType == RawNTLMSSP)) {
3867                 cFYI(1, ("NTLMSSP sesssetup"));
3868                 rc = CIFSNTLMSSPNegotiateSessSetup(xid, pSesInfo, &ntlmv2_flag,
3869                                                    nls_info);
3870                 if (!rc) {
3871                         if (ntlmv2_flag) {
3872                                 char *v2_response;
3873                                 cFYI(1, ("more secure NTLM ver2 hash"));
3874                                 if (CalcNTLMv2_partial_mac_key(pSesInfo,
3875                                                                 nls_info)) {
3876                                         rc = -ENOMEM;
3877                                         goto ss_err_exit;
3878                                 } else
3879                                         v2_response = kmalloc(16 + 64 /* blob*/,
3880                                                                 GFP_KERNEL);
3881                                 if (v2_response) {
3882                                         CalcNTLMv2_response(pSesInfo,
3883                                                                 v2_response);
3884                                 /*      if (first_time)
3885                                                 cifs_calculate_ntlmv2_mac_key */
3886                                         kfree(v2_response);
3887                                         /* BB Put dummy sig in SessSetup PDU? */
3888                                 } else {
3889                                         rc = -ENOMEM;
3890                                         goto ss_err_exit;
3891                                 }
3892
3893                         } else {
3894                                 SMBNTencrypt(pSesInfo->password,
3895                                              server->cryptKey,
3896                                              ntlm_session_key);
3897
3898                                 if (first_time)
3899                                         cifs_calculate_mac_key(
3900                                              &server->mac_signing_key,
3901                                              ntlm_session_key,
3902                                              pSesInfo->password);
3903                         }
3904                         /* for better security the weaker lanman hash not sent
3905                            in AuthSessSetup so we no longer calculate it */
3906
3907                         rc = CIFSNTLMSSPAuthSessSetup(xid, pSesInfo,
3908                                                       ntlm_session_key,
3909                                                       ntlmv2_flag,
3910                                                       nls_info);
3911                 }
3912         } else { /* old style NTLM 0.12 session setup */
3913                 SMBNTencrypt(pSesInfo->password, server->cryptKey,
3914                              ntlm_session_key);
3915
3916                 if (first_time)
3917                         cifs_calculate_mac_key(&server->mac_signing_key,
3918                                                 ntlm_session_key,
3919                                                 pSesInfo->password);
3920
3921                 rc = CIFSSessSetup(xid, pSesInfo, ntlm_session_key, nls_info);
3922         }
3923         if (rc) {
3924                 cERROR(1, ("Send error in SessSetup = %d", rc));
3925         } else {
3926                 cFYI(1, ("CIFS Session Established successfully"));
3927                         spin_lock(&GlobalMid_Lock);
3928                         pSesInfo->status = CifsGood;
3929                         pSesInfo->need_reconnect = false;
3930                         spin_unlock(&GlobalMid_Lock);
3931         }
3932
3933 ss_err_exit:
3934         return rc;
3935 }
3936