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   1 /*
   2  *   fs/cifs/connect.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2008
   5  *   Author(s): Steve French (sfrench@us.ibm.com)
   6  *
   7  *   This library is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU Lesser General Public License as published
   9  *   by the Free Software Foundation; either version 2.1 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This library is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  15  *   the GNU Lesser General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU Lesser General Public License
  18  *   along with this library; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21 #include <linux/fs.h>
  22 #include <linux/net.h>
  23 #include <linux/string.h>
  24 #include <linux/list.h>
  25 #include <linux/wait.h>
  26 #include <linux/ipv6.h>
  27 #include <linux/pagemap.h>
  28 #include <linux/ctype.h>
  29 #include <linux/utsname.h>
  30 #include <linux/mempool.h>
  31 #include <linux/delay.h>
  32 #include <linux/completion.h>
  33 #include <linux/kthread.h>
  34 #include <linux/pagevec.h>
  35 #include <linux/freezer.h>
  36 #include <asm/uaccess.h>
  37 #include <asm/processor.h>
  38 #include "cifspdu.h"
  39 #include "cifsglob.h"
  40 #include "cifsproto.h"
  41 #include "cifs_unicode.h"
  42 #include "cifs_debug.h"
  43 #include "cifs_fs_sb.h"
  44 #include "ntlmssp.h"
  45 #include "nterr.h"
  46 #include "rfc1002pdu.h"
  47 #include "cn_cifs.h"
  48
  49 #define CIFS_PORT 445
  50 #define RFC1001_PORT 139
  51
  52 extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
  53                          unsigned char *p24);
  54
  55 extern mempool_t *cifs_req_poolp;
  56
  57 struct smb_vol {
  58         char *username;
  59         char *password;
  60         char *domainname;
  61         char *UNC;
  62         char *UNCip;
  63         char *in6_addr;   /* ipv6 address as human readable form of in6_addr */
  64         char *iocharset;  /* local code page for mapping to and from Unicode */
  65         char source_rfc1001_name[16]; /* netbios name of client */
  66         char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
  67         uid_t linux_uid;
  68         gid_t linux_gid;
  69         mode_t file_mode;
  70         mode_t dir_mode;
  71         unsigned secFlg;
  72         bool rw:1;
  73         bool retry:1;
  74         bool intr:1;
  75         bool setuids:1;
  76         bool override_uid:1;
  77         bool override_gid:1;
  78         bool 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         unsigned int rsize;
  99         unsigned int wsize;
 100         unsigned int sockopt;
 101         unsigned short int port;
 102         char *prepath;
 103 };
 104
 105 static int ipv4_connect(struct TCP_Server_Info *server);
 106 static int ipv6_connect(struct TCP_Server_Info *server);
 107
 108 /*
 109  * cifs tcp session reconnection
 110  *
 111  * mark tcp session as reconnecting so temporarily locked
 112  * mark all smb sessions as reconnecting for tcp session
 113  * reconnect tcp session
 114  * wake up waiters on reconnection? - (not needed currently)
 115  */
 116 static int
 117 cifs_reconnect(struct TCP_Server_Info *server)
 118 {
 119         int rc = 0;
 120         struct list_head *tmp, *tmp2;
 121         struct cifsSesInfo *ses;
 122         struct cifsTconInfo *tcon;
 123         struct mid_q_entry *mid_entry;
 124
 125         spin_lock(&GlobalMid_Lock);
 126         if (server->tcpStatus == CifsExiting) {
 127                 /* the demux thread will exit normally
 128                 next time through the loop */
 129                 spin_unlock(&GlobalMid_Lock);
 130                 return rc;
 131         } else
 132                 server->tcpStatus = CifsNeedReconnect;
 133         spin_unlock(&GlobalMid_Lock);
 134         server->maxBuf = 0;
 135
 136         cFYI(1, ("Reconnecting tcp session"));
 137
 138         /* before reconnecting the tcp session, mark the smb session (uid)
 139                 and the tid bad so they are not used until reconnected */
 140         read_lock(&cifs_tcp_ses_lock);
 141         list_for_each(tmp, &server->smb_ses_list) {
 142                 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
 143                 ses->need_reconnect = true;
 144                 ses->ipc_tid = 0;
 145                 list_for_each(tmp2, &ses->tcon_list) {
 146                         tcon = list_entry(tmp2, struct cifsTconInfo, tcon_list);
 147                         tcon->need_reconnect = true;
 148                 }
 149         }
 150         read_unlock(&cifs_tcp_ses_lock);
 151         /* do not want to be sending data on a socket we are freeing */
 152         mutex_lock(&server->srv_mutex);
 153         if (server->ssocket) {
 154                 cFYI(1, ("State: 0x%x Flags: 0x%lx", server->ssocket->state,
 155                         server->ssocket->flags));
 156                 kernel_sock_shutdown(server->ssocket, SHUT_WR);
 157                 cFYI(1, ("Post shutdown state: 0x%x Flags: 0x%lx",
 158                         server->ssocket->state,
 159                         server->ssocket->flags));
 160                 sock_release(server->ssocket);
 161                 server->ssocket = NULL;
 162         }
 163
 164         spin_lock(&GlobalMid_Lock);
 165         list_for_each(tmp, &server->pending_mid_q) {
 166                 mid_entry = list_entry(tmp, struct
 167                                         mid_q_entry,
 168                                         qhead);
 169                 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
 170                                 /* Mark other intransit requests as needing
 171                                    retry so we do not immediately mark the
 172                                    session bad again (ie after we reconnect
 173                                    below) as they timeout too */
 174                         mid_entry->midState = MID_RETRY_NEEDED;
 175                 }
 176         }
 177         spin_unlock(&GlobalMid_Lock);
 178         mutex_unlock(&server->srv_mutex);
 179
 180         while ((server->tcpStatus != CifsExiting) &&
 181                (server->tcpStatus != CifsGood)) {
 182                 try_to_freeze();
 183                 if (server->addr.sockAddr6.sin6_family == AF_INET6)
 184                         rc = ipv6_connect(server);
 185                 else
 186                         rc = ipv4_connect(server);
 187                 if (rc) {
 188                         cFYI(1, ("reconnect error %d", rc));
 189                         msleep(3000);
 190                 } else {
 191                         atomic_inc(&tcpSesReconnectCount);
 192                         spin_lock(&GlobalMid_Lock);
 193                         if (server->tcpStatus != CifsExiting)
 194                                 server->tcpStatus = CifsGood;
 195                         server->sequence_number = 0;
 196                         spin_unlock(&GlobalMid_Lock);
 197         /*              atomic_set(&server->inFlight,0);*/
 198                         wake_up(&server->response_q);
 199                 }
 200         }
 201         return rc;
 202 }
 203
 204 /*
 205         return codes:
 206                 0       not a transact2, or all data present
 207                 >0      transact2 with that much data missing
 208                 -EINVAL = invalid transact2
 209
 210  */
 211 static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
 212 {
 213         struct smb_t2_rsp *pSMBt;
 214         int total_data_size;
 215         int data_in_this_rsp;
 216         int remaining;
 217
 218         if (pSMB->Command != SMB_COM_TRANSACTION2)
 219                 return 0;
 220
 221         /* check for plausible wct, bcc and t2 data and parm sizes */
 222         /* check for parm and data offset going beyond end of smb */
 223         if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
 224                 cFYI(1, ("invalid transact2 word count"));
 225                 return -EINVAL;
 226         }
 227
 228         pSMBt = (struct smb_t2_rsp *)pSMB;
 229
 230         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 231         data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 232
 233         remaining = total_data_size - data_in_this_rsp;
 234
 235         if (remaining == 0)
 236                 return 0;
 237         else if (remaining < 0) {
 238                 cFYI(1, ("total data %d smaller than data in frame %d",
 239                         total_data_size, data_in_this_rsp));
 240                 return -EINVAL;
 241         } else {
 242                 cFYI(1, ("missing %d bytes from transact2, check next response",
 243                         remaining));
 244                 if (total_data_size > maxBufSize) {
 245                         cERROR(1, ("TotalDataSize %d is over maximum buffer %d",
 246                                 total_data_size, maxBufSize));
 247                         return -EINVAL;
 248                 }
 249                 return remaining;
 250         }
 251 }
 252
 253 static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
 254 {
 255         struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
 256         struct smb_t2_rsp *pSMBt  = (struct smb_t2_rsp *)pTargetSMB;
 257         int total_data_size;
 258         int total_in_buf;
 259         int remaining;
 260         int total_in_buf2;
 261         char *data_area_of_target;
 262         char *data_area_of_buf2;
 263         __u16 byte_count;
 264
 265         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 266
 267         if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
 268                 cFYI(1, ("total data size of primary and secondary t2 differ"));
 269         }
 270
 271         total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 272
 273         remaining = total_data_size - total_in_buf;
 274
 275         if (remaining < 0)
 276                 return -EINVAL;
 277
 278         if (remaining == 0) /* nothing to do, ignore */
 279                 return 0;
 280
 281         total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
 282         if (remaining < total_in_buf2) {
 283                 cFYI(1, ("transact2 2nd response contains too much data"));
 284         }
 285
 286         /* find end of first SMB data area */
 287         data_area_of_target = (char *)&pSMBt->hdr.Protocol +
 288                                 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
 289         /* validate target area */
 290
 291         data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
 292                                         le16_to_cpu(pSMB2->t2_rsp.DataOffset);
 293
 294         data_area_of_target += total_in_buf;
 295
 296         /* copy second buffer into end of first buffer */
 297         memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2);
 298         total_in_buf += total_in_buf2;
 299         pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
 300         byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
 301         byte_count += total_in_buf2;
 302         BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
 303
 304         byte_count = pTargetSMB->smb_buf_length;
 305         byte_count += total_in_buf2;
 306
 307         /* BB also add check that we are not beyond maximum buffer size */
 308
 309         pTargetSMB->smb_buf_length = byte_count;
 310
 311         if (remaining == total_in_buf2) {
 312                 cFYI(1, ("found the last secondary response"));
 313                 return 0; /* we are done */
 314         } else /* more responses to go */
 315                 return 1;
 316
 317 }
 318
 319 static int
 320 cifs_demultiplex_thread(struct TCP_Server_Info *server)
 321 {
 322         int length;
 323         unsigned int pdu_length, total_read;
 324         struct smb_hdr *smb_buffer = NULL;
 325         struct smb_hdr *bigbuf = NULL;
 326         struct smb_hdr *smallbuf = NULL;
 327         struct msghdr smb_msg;
 328         struct kvec iov;
 329         struct socket *csocket = server->ssocket;
 330         struct list_head *tmp;
 331         struct cifsSesInfo *ses;
 332         struct task_struct *task_to_wake = NULL;
 333         struct mid_q_entry *mid_entry;
 334         char temp;
 335         bool isLargeBuf = false;
 336         bool isMultiRsp;
 337         int reconnect;
 338
 339         current->flags |= PF_MEMALLOC;
 340         cFYI(1, ("Demultiplex PID: %d", task_pid_nr(current)));
 341
 342         length = atomic_inc_return(&tcpSesAllocCount);
 343         if (length > 1)
 344                 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
 345                                 GFP_KERNEL);
 346
 347         set_freezable();
 348         while (server->tcpStatus != CifsExiting) {
 349                 if (try_to_freeze())
 350                         continue;
 351                 if (bigbuf == NULL) {
 352                         bigbuf = cifs_buf_get();
 353                         if (!bigbuf) {
 354                                 cERROR(1, ("No memory for large SMB response"));
 355                                 msleep(3000);
 356                                 /* retry will check if exiting */
 357                                 continue;
 358                         }
 359                 } else if (isLargeBuf) {
 360                         /* we are reusing a dirty large buf, clear its start */
 361                         memset(bigbuf, 0, sizeof(struct smb_hdr));
 362                 }
 363
 364                 if (smallbuf == NULL) {
 365                         smallbuf = cifs_small_buf_get();
 366                         if (!smallbuf) {
 367                                 cERROR(1, ("No memory for SMB response"));
 368                                 msleep(1000);
 369                                 /* retry will check if exiting */
 370                                 continue;
 371                         }
 372                         /* beginning of smb buffer is cleared in our buf_get */
 373                 } else /* if existing small buf clear beginning */
 374                         memset(smallbuf, 0, sizeof(struct smb_hdr));
 375
 376                 isLargeBuf = false;
 377                 isMultiRsp = false;
 378                 smb_buffer = smallbuf;
 379                 iov.iov_base = smb_buffer;
 380                 iov.iov_len = 4;
 381                 smb_msg.msg_control = NULL;
 382                 smb_msg.msg_controllen = 0;
 383                 pdu_length = 4; /* enough to get RFC1001 header */
 384 incomplete_rcv:
 385                 length =
 386                     kernel_recvmsg(csocket, &smb_msg,
 387                                 &iov, 1, pdu_length, 0 /* BB other flags? */);
 388
 389                 if (server->tcpStatus == CifsExiting) {
 390                         break;
 391                 } else if (server->tcpStatus == CifsNeedReconnect) {
 392                         cFYI(1, ("Reconnect after server stopped responding"));
 393                         cifs_reconnect(server);
 394                         cFYI(1, ("call to reconnect done"));
 395                         csocket = server->ssocket;
 396                         continue;
 397                 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
 398                         msleep(1); /* minimum sleep to prevent looping
 399                                 allowing socket to clear and app threads to set
 400                                 tcpStatus CifsNeedReconnect if server hung */
 401                         if (pdu_length < 4) {
 402                                 iov.iov_base = (4 - pdu_length) +
 403                                                         (char *)smb_buffer;
 404                                 iov.iov_len = pdu_length;
 405                                 smb_msg.msg_control = NULL;
 406                                 smb_msg.msg_controllen = 0;
 407                                 goto incomplete_rcv;
 408                         } else
 409                                 continue;
 410                 } else if (length <= 0) {
 411                         if (server->tcpStatus == CifsNew) {
 412                                 cFYI(1, ("tcp session abend after SMBnegprot"));
 413                                 /* some servers kill the TCP session rather than
 414                                    returning an SMB negprot error, in which
 415                                    case reconnecting here is not going to help,
 416                                    and so simply return error to mount */
 417                                 break;
 418                         }
 419                         if (!try_to_freeze() && (length == -EINTR)) {
 420                                 cFYI(1, ("cifsd thread killed"));
 421                                 break;
 422                         }
 423                         cFYI(1, ("Reconnect after unexpected peek error %d",
 424                                 length));
 425                         cifs_reconnect(server);
 426                         csocket = server->ssocket;
 427                         wake_up(&server->response_q);
 428                         continue;
 429                 } else if (length < pdu_length) {
 430                         cFYI(1, ("requested %d bytes but only got %d bytes",
 431                                   pdu_length, length));
 432                         pdu_length -= length;
 433                         msleep(1);
 434                         goto incomplete_rcv;
 435                 }
 436
 437                 /* The right amount was read from socket - 4 bytes */
 438                 /* so we can now interpret the length field */
 439
 440                 /* the first byte big endian of the length field,
 441                 is actually not part of the length but the type
 442                 with the most common, zero, as regular data */
 443                 temp = *((char *) smb_buffer);
 444
 445                 /* Note that FC 1001 length is big endian on the wire,
 446                 but we convert it here so it is always manipulated
 447                 as host byte order */
 448                 pdu_length = be32_to_cpu((__force __be32)smb_buffer->smb_buf_length);
 449                 smb_buffer->smb_buf_length = pdu_length;
 450
 451                 cFYI(1, ("rfc1002 length 0x%x", pdu_length+4));
 452
 453                 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
 454                         continue;
 455                 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
 456                         cFYI(1, ("Good RFC 1002 session rsp"));
 457                         continue;
 458                 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
 459                         /* we get this from Windows 98 instead of
 460                            an error on SMB negprot response */
 461                         cFYI(1, ("Negative RFC1002 Session Response Error 0x%x)",
 462                                 pdu_length));
 463                         if (server->tcpStatus == CifsNew) {
 464                                 /* if nack on negprot (rather than
 465                                 ret of smb negprot error) reconnecting
 466                                 not going to help, ret error to mount */
 467                                 break;
 468                         } else {
 469                                 /* give server a second to
 470                                 clean up before reconnect attempt */
 471                                 msleep(1000);
 472                                 /* always try 445 first on reconnect
 473                                 since we get NACK on some if we ever
 474                                 connected to port 139 (the NACK is
 475                                 since we do not begin with RFC1001
 476                                 session initialize frame) */
 477                                 server->addr.sockAddr.sin_port =
 478                                         htons(CIFS_PORT);
 479                                 cifs_reconnect(server);
 480                                 csocket = server->ssocket;
 481                                 wake_up(&server->response_q);
 482                                 continue;
 483                         }
 484                 } else if (temp != (char) 0) {
 485                         cERROR(1, ("Unknown RFC 1002 frame"));
 486                         cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
 487                                       length);
 488                         cifs_reconnect(server);
 489                         csocket = server->ssocket;
 490                         continue;
 491                 }
 492
 493                 /* else we have an SMB response */
 494                 if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
 495                             (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) {
 496                         cERROR(1, ("Invalid size SMB length %d pdu_length %d",
 497                                         length, pdu_length+4));
 498                         cifs_reconnect(server);
 499                         csocket = server->ssocket;
 500                         wake_up(&server->response_q);
 501                         continue;
 502                 }
 503
 504                 /* else length ok */
 505                 reconnect = 0;
 506
 507                 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
 508                         isLargeBuf = true;
 509                         memcpy(bigbuf, smallbuf, 4);
 510                         smb_buffer = bigbuf;
 511                 }
 512                 length = 0;
 513                 iov.iov_base = 4 + (char *)smb_buffer;
 514                 iov.iov_len = pdu_length;
 515                 for (total_read = 0; total_read < pdu_length;
 516                      total_read += length) {
 517                         length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
 518                                                 pdu_length - total_read, 0);
 519                         if ((server->tcpStatus == CifsExiting) ||
 520                             (length == -EINTR)) {
 521                                 /* then will exit */
 522                                 reconnect = 2;
 523                                 break;
 524                         } else if (server->tcpStatus == CifsNeedReconnect) {
 525                                 cifs_reconnect(server);
 526                                 csocket = server->ssocket;
 527                                 /* Reconnect wakes up rspns q */
 528                                 /* Now we will reread sock */
 529                                 reconnect = 1;
 530                                 break;
 531                         } else if ((length == -ERESTARTSYS) ||
 532                                    (length == -EAGAIN)) {
 533                                 msleep(1); /* minimum sleep to prevent looping,
 534                                               allowing socket to clear and app
 535                                               threads to set tcpStatus
 536                                               CifsNeedReconnect if server hung*/
 537                                 length = 0;
 538                                 continue;
 539                         } else if (length <= 0) {
 540                                 cERROR(1, ("Received no data, expecting %d",
 541                                               pdu_length - total_read));
 542                                 cifs_reconnect(server);
 543                                 csocket = server->ssocket;
 544                                 reconnect = 1;
 545                                 break;
 546                         }
 547                 }
 548                 if (reconnect == 2)
 549                         break;
 550                 else if (reconnect == 1)
 551                         continue;
 552
 553                 length += 4; /* account for rfc1002 hdr */
 554
 555
 556                 dump_smb(smb_buffer, length);
 557                 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
 558                         cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
 559                         continue;
 560                 }
 561
 562
 563                 task_to_wake = NULL;
 564                 spin_lock(&GlobalMid_Lock);
 565                 list_for_each(tmp, &server->pending_mid_q) {
 566                         mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 567
 568                         if ((mid_entry->mid == smb_buffer->Mid) &&
 569                             (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
 570                             (mid_entry->command == smb_buffer->Command)) {
 571                                 if (check2ndT2(smb_buffer,server->maxBuf) > 0) {
 572                                         /* We have a multipart transact2 resp */
 573                                         isMultiRsp = true;
 574                                         if (mid_entry->resp_buf) {
 575                                                 /* merge response - fix up 1st*/
 576                                                 if (coalesce_t2(smb_buffer,
 577                                                         mid_entry->resp_buf)) {
 578                                                         mid_entry->multiRsp =
 579                                                                  true;
 580                                                         break;
 581                                                 } else {
 582                                                         /* all parts received */
 583                                                         mid_entry->multiEnd =
 584                                                                  true;
 585                                                         goto multi_t2_fnd;
 586                                                 }
 587                                         } else {
 588                                                 if (!isLargeBuf) {
 589                                                         cERROR(1,("1st trans2 resp needs bigbuf"));
 590                                         /* BB maybe we can fix this up,  switch
 591                                            to already allocated large buffer? */
 592                                                 } else {
 593                                                         /* Have first buffer */
 594                                                         mid_entry->resp_buf =
 595                                                                  smb_buffer;
 596                                                         mid_entry->largeBuf =
 597                                                                  true;
 598                                                         bigbuf = NULL;
 599                                                 }
 600                                         }
 601                                         break;
 602                                 }
 603                                 mid_entry->resp_buf = smb_buffer;
 604                                 mid_entry->largeBuf = isLargeBuf;
 605 multi_t2_fnd:
 606                                 task_to_wake = mid_entry->tsk;
 607                                 mid_entry->midState = MID_RESPONSE_RECEIVED;
 608 #ifdef CONFIG_CIFS_STATS2
 609                                 mid_entry->when_received = jiffies;
 610 #endif
 611                                 /* so we do not time out requests to  server
 612                                 which is still responding (since server could
 613                                 be busy but not dead) */
 614                                 server->lstrp = jiffies;
 615                                 break;
 616                         }
 617                 }
 618                 spin_unlock(&GlobalMid_Lock);
 619                 if (task_to_wake) {
 620                         /* Was previous buf put in mpx struct for multi-rsp? */
 621                         if (!isMultiRsp) {
 622                                 /* smb buffer will be freed by user thread */
 623                                 if (isLargeBuf)
 624                                         bigbuf = NULL;
 625                                 else
 626                                         smallbuf = NULL;
 627                         }
 628                         wake_up_process(task_to_wake);
 629                 } else if (!is_valid_oplock_break(smb_buffer, server) &&
 630                            !isMultiRsp) {
 631                         cERROR(1, ("No task to wake, unknown frame received! "
 632                                    "NumMids %d", midCount.counter));
 633                         cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
 634                                       sizeof(struct smb_hdr));
 635 #ifdef CONFIG_CIFS_DEBUG2
 636                         cifs_dump_detail(smb_buffer);
 637                         cifs_dump_mids(server);
 638 #endif /* CIFS_DEBUG2 */
 639
 640                 }
 641         } /* end while !EXITING */
 642
 643         /* take it off the list, if it's not already */
 644         write_lock(&cifs_tcp_ses_lock);
 645         list_del_init(&server->tcp_ses_list);
 646         write_unlock(&cifs_tcp_ses_lock);
 647
 648         spin_lock(&GlobalMid_Lock);
 649         server->tcpStatus = CifsExiting;
 650         spin_unlock(&GlobalMid_Lock);
 651         wake_up_all(&server->response_q);
 652
 653         /* check if we have blocked requests that need to free */
 654         /* Note that cifs_max_pending is normally 50, but
 655         can be set at module install time to as little as two */
 656         spin_lock(&GlobalMid_Lock);
 657         if (atomic_read(&server->inFlight) >= cifs_max_pending)
 658                 atomic_set(&server->inFlight, cifs_max_pending - 1);
 659         /* We do not want to set the max_pending too low or we
 660         could end up with the counter going negative */
 661         spin_unlock(&GlobalMid_Lock);
 662         /* Although there should not be any requests blocked on
 663         this queue it can not hurt to be paranoid and try to wake up requests
 664         that may haven been blocked when more than 50 at time were on the wire
 665         to the same server - they now will see the session is in exit state
 666         and get out of SendReceive.  */
 667         wake_up_all(&server->request_q);
 668         /* give those requests time to exit */
 669         msleep(125);
 670
 671         if (server->ssocket) {
 672                 sock_release(csocket);
 673                 server->ssocket = NULL;
 674         }
 675         /* buffer usuallly freed in free_mid - need to free it here on exit */
 676         cifs_buf_release(bigbuf);
 677         if (smallbuf) /* no sense logging a debug message if NULL */
 678                 cifs_small_buf_release(smallbuf);
 679
 680         /*
 681          * BB: we shouldn't have to do any of this. It shouldn't be
 682          * possible to exit from the thread with active SMB sessions
 683          */
 684         read_lock(&cifs_tcp_ses_lock);
 685         if (list_empty(&server->pending_mid_q)) {
 686                 /* loop through server session structures attached to this and
 687                     mark them dead */
 688                 list_for_each(tmp, &server->smb_ses_list) {
 689                         ses = list_entry(tmp, struct cifsSesInfo,
 690                                          smb_ses_list);
 691                         ses->status = CifsExiting;
 692                         ses->server = NULL;
 693                 }
 694                 read_unlock(&cifs_tcp_ses_lock);
 695         } else {
 696                 /* although we can not zero the server struct pointer yet,
 697                 since there are active requests which may depnd on them,
 698                 mark the corresponding SMB sessions as exiting too */
 699                 list_for_each(tmp, &server->smb_ses_list) {
 700                         ses = list_entry(tmp, struct cifsSesInfo,
 701                                          smb_ses_list);
 702                         ses->status = CifsExiting;
 703                 }
 704
 705                 spin_lock(&GlobalMid_Lock);
 706                 list_for_each(tmp, &server->pending_mid_q) {
 707                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 708                         if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
 709                                 cFYI(1, ("Clearing Mid 0x%x - waking up ",
 710                                          mid_entry->mid));
 711                                 task_to_wake = mid_entry->tsk;
 712                                 if (task_to_wake)
 713                                         wake_up_process(task_to_wake);
 714                         }
 715                 }
 716                 spin_unlock(&GlobalMid_Lock);
 717                 read_unlock(&cifs_tcp_ses_lock);
 718                 /* 1/8th of sec is more than enough time for them to exit */
 719                 msleep(125);
 720         }
 721
 722         if (!list_empty(&server->pending_mid_q)) {
 723                 /* mpx threads have not exited yet give them
 724                 at least the smb send timeout time for long ops */
 725                 /* due to delays on oplock break requests, we need
 726                 to wait at least 45 seconds before giving up
 727                 on a request getting a response and going ahead
 728                 and killing cifsd */
 729                 cFYI(1, ("Wait for exit from demultiplex thread"));
 730                 msleep(46000);
 731                 /* if threads still have not exited they are probably never
 732                 coming home not much else we can do but free the memory */
 733         }
 734
 735         /* last chance to mark ses pointers invalid
 736         if there are any pointing to this (e.g
 737         if a crazy root user tried to kill cifsd
 738         kernel thread explicitly this might happen) */
 739         /* BB: This shouldn't be necessary, see above */
 740         read_lock(&cifs_tcp_ses_lock);
 741         list_for_each(tmp, &server->smb_ses_list) {
 742                 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
 743                 ses->server = NULL;
 744         }
 745         read_unlock(&cifs_tcp_ses_lock);
 746
 747         kfree(server->hostname);
 748         task_to_wake = xchg(&server->tsk, NULL);
 749         kfree(server);
 750
 751         length = atomic_dec_return(&tcpSesAllocCount);
 752         if (length  > 0)
 753                 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
 754                                 GFP_KERNEL);
 755
 756         /* if server->tsk was NULL then wait for a signal before exiting */
 757         if (!task_to_wake) {
 758                 set_current_state(TASK_INTERRUPTIBLE);
 759                 while (!signal_pending(current)) {
 760                         schedule();
 761                         set_current_state(TASK_INTERRUPTIBLE);
 762                 }
 763                 set_current_state(TASK_RUNNING);
 764         }
 765
 766         module_put_and_exit(0);
 767 }
 768
 769 /* extract the host portion of the UNC string */
 770 static char *
 771 extract_hostname(const char *unc)
 772 {
 773         const char *src;
 774         char *dst, *delim;
 775         unsigned int len;
 776
 777         /* skip double chars at beginning of string */
 778         /* BB: check validity of these bytes? */
 779         src = unc + 2;
 780
 781         /* delimiter between hostname and sharename is always '\\' now */
 782         delim = strchr(src, '\\');
 783         if (!delim)
 784                 return ERR_PTR(-EINVAL);
 785
 786         len = delim - src;
 787         dst = kmalloc((len + 1), GFP_KERNEL);
 788         if (dst == NULL)
 789                 return ERR_PTR(-ENOMEM);
 790
 791         memcpy(dst, src, len);
 792         dst[len] = '\0';
 793
 794         return dst;
 795 }
 796
 797 static int
 798 cifs_parse_mount_options(char *options, const char *devname,
 799                          struct smb_vol *vol)
 800 {
 801         char *value;
 802         char *data;
 803         unsigned int  temp_len, i, j;
 804         char separator[2];
 805
 806         separator[0] = ',';
 807         separator[1] = 0;
 808
 809         if (Local_System_Name[0] != 0)
 810                 memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
 811         else {
 812                 char *nodename = utsname()->nodename;
 813                 int n = strnlen(nodename, 15);
 814                 memset(vol->source_rfc1001_name, 0x20, 15);
 815                 for (i = 0; i < n; i++) {
 816                         /* does not have to be perfect mapping since field is
 817                         informational, only used for servers that do not support
 818                         port 445 and it can be overridden at mount time */
 819                         vol->source_rfc1001_name[i] = toupper(nodename[i]);
 820                 }
 821         }
 822         vol->source_rfc1001_name[15] = 0;
 823         /* null target name indicates to use *SMBSERVR default called name
 824            if we end up sending RFC1001 session initialize */
 825         vol->target_rfc1001_name[0] = 0;
 826         vol->linux_uid = current_uid();  /* use current_euid() instead? */
 827         vol->linux_gid = current_gid();
 828         vol->dir_mode = S_IRWXUGO;
 829         /* 2767 perms indicate mandatory locking support */
 830         vol->file_mode = (S_IRWXUGO | S_ISGID) & (~S_IXGRP);
 831
 832         /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
 833         vol->rw = true;
 834         /* default is always to request posix paths. */
 835         vol->posix_paths = 1;
 836
 837         if (!options)
 838                 return 1;
 839
 840         if (strncmp(options, "sep=", 4) == 0) {
 841                 if (options[4] != 0) {
 842                         separator[0] = options[4];
 843                         options += 5;
 844                 } else {
 845                         cFYI(1, ("Null separator not allowed"));
 846                 }
 847         }
 848
 849         while ((data = strsep(&options, separator)) != NULL) {
 850                 if (!*data)
 851                         continue;
 852                 if ((value = strchr(data, '=')) != NULL)
 853                         *value++ = '\0';
 854
 855                 /* Have to parse this before we parse for "user" */
 856                 if (strnicmp(data, "user_xattr", 10) == 0) {
 857                         vol->no_xattr = 0;
 858                 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
 859                         vol->no_xattr = 1;
 860                 } else if (strnicmp(data, "user", 4) == 0) {
 861                         if (!value) {
 862                                 printk(KERN_WARNING
 863                                        "CIFS: invalid or missing username\n");
 864                                 return 1;       /* needs_arg; */
 865                         } else if (!*value) {
 866                                 /* null user, ie anonymous, authentication */
 867                                 vol->nullauth = 1;
 868                         }
 869                         if (strnlen(value, 200) < 200) {
 870                                 vol->username = value;
 871                         } else {
 872                                 printk(KERN_WARNING "CIFS: username too long\n");
 873                                 return 1;
 874                         }
 875                 } else if (strnicmp(data, "pass", 4) == 0) {
 876                         if (!value) {
 877                                 vol->password = NULL;
 878                                 continue;
 879                         } else if (value[0] == 0) {
 880                                 /* check if string begins with double comma
 881                                    since that would mean the password really
 882                                    does start with a comma, and would not
 883                                    indicate an empty string */
 884                                 if (value[1] != separator[0]) {
 885                                         vol->password = NULL;
 886                                         continue;
 887                                 }
 888                         }
 889                         temp_len = strlen(value);
 890                         /* removed password length check, NTLM passwords
 891                                 can be arbitrarily long */
 892
 893                         /* if comma in password, the string will be
 894                         prematurely null terminated.  Commas in password are
 895                         specified across the cifs mount interface by a double
 896                         comma ie ,, and a comma used as in other cases ie ','
 897                         as a parameter delimiter/separator is single and due
 898                         to the strsep above is temporarily zeroed. */
 899
 900                         /* NB: password legally can have multiple commas and
 901                         the only illegal character in a password is null */
 902
 903                         if ((value[temp_len] == 0) &&
 904                             (value[temp_len+1] == separator[0])) {
 905                                 /* reinsert comma */
 906                                 value[temp_len] = separator[0];
 907                                 temp_len += 2;  /* move after second comma */
 908                                 while (value[temp_len] != 0)  {
 909                                         if (value[temp_len] == separator[0]) {
 910                                                 if (value[temp_len+1] ==
 911                                                      separator[0]) {
 912                                                 /* skip second comma */
 913                                                         temp_len++;
 914                                                 } else {
 915                                                 /* single comma indicating start
 916                                                          of next parm */
 917                                                         break;
 918                                                 }
 919                                         }
 920                                         temp_len++;
 921                                 }
 922                                 if (value[temp_len] == 0) {
 923                                         options = NULL;
 924                                 } else {
 925                                         value[temp_len] = 0;
 926                                         /* point option to start of next parm */
 927                                         options = value + temp_len + 1;
 928                                 }
 929                                 /* go from value to value + temp_len condensing
 930                                 double commas to singles. Note that this ends up
 931                                 allocating a few bytes too many, which is ok */
 932                                 vol->password = kzalloc(temp_len, GFP_KERNEL);
 933                                 if (vol->password == NULL) {
 934                                         printk(KERN_WARNING "CIFS: no memory "
 935                                                             "for password\n");
 936                                         return 1;
 937                                 }
 938                                 for (i = 0, j = 0; i < temp_len; i++, j++) {
 939                                         vol->password[j] = value[i];
 940                                         if (value[i] == separator[0]
 941                                                 && value[i+1] == separator[0]) {
 942                                                 /* skip second comma */
 943                                                 i++;
 944                                         }
 945                                 }
 946                                 vol->password[j] = 0;
 947                         } else {
 948                                 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
 949                                 if (vol->password == NULL) {
 950                                         printk(KERN_WARNING "CIFS: no memory "
 951                                                             "for password\n");
 952                                         return 1;
 953                                 }
 954                                 strcpy(vol->password, value);
 955                         }
 956                 } else if (strnicmp(data, "ip", 2) == 0) {
 957                         if (!value || !*value) {
 958                                 vol->UNCip = NULL;
 959                         } else if (strnlen(value, 35) < 35) {
 960                                 vol->UNCip = value;
 961                         } else {
 962                                 printk(KERN_WARNING "CIFS: ip address "
 963                                                     "too long\n");
 964                                 return 1;
 965                         }
 966                 } else if (strnicmp(data, "sec", 3) == 0) {
 967                         if (!value || !*value) {
 968                                 cERROR(1, ("no security value specified"));
 969                                 continue;
 970                         } else if (strnicmp(value, "krb5i", 5) == 0) {
 971                                 vol->secFlg |= CIFSSEC_MAY_KRB5 |
 972                                         CIFSSEC_MUST_SIGN;
 973                         } else if (strnicmp(value, "krb5p", 5) == 0) {
 974                                 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
 975                                         CIFSSEC_MAY_KRB5; */
 976                                 cERROR(1, ("Krb5 cifs privacy not supported"));
 977                                 return 1;
 978                         } else if (strnicmp(value, "krb5", 4) == 0) {
 979                                 vol->secFlg |= CIFSSEC_MAY_KRB5;
 980                         } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
 981                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
 982                                         CIFSSEC_MUST_SIGN;
 983                         } else if (strnicmp(value, "ntlmv2", 6) == 0) {
 984                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
 985                         } else if (strnicmp(value, "ntlmi", 5) == 0) {
 986                                 vol->secFlg |= CIFSSEC_MAY_NTLM |
 987                                         CIFSSEC_MUST_SIGN;
 988                         } else if (strnicmp(value, "ntlm", 4) == 0) {
 989                                 /* ntlm is default so can be turned off too */
 990                                 vol->secFlg |= CIFSSEC_MAY_NTLM;
 991                         } else if (strnicmp(value, "nontlm", 6) == 0) {
 992                                 /* BB is there a better way to do this? */
 993                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
 994 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 995                         } else if (strnicmp(value, "lanman", 6) == 0) {
 996                                 vol->secFlg |= CIFSSEC_MAY_LANMAN;
 997 #endif
 998                         } else if (strnicmp(value, "none", 4) == 0) {
 999                                 vol->nullauth = 1;
1000                         } else {
1001                                 cERROR(1, ("bad security option: %s", value));
1002                                 return 1;
1003                         }
1004                 } else if ((strnicmp(data, "unc", 3) == 0)
1005                            || (strnicmp(data, "target", 6) == 0)
1006                            || (strnicmp(data, "path", 4) == 0)) {
1007                         if (!value || !*value) {
1008                                 printk(KERN_WARNING "CIFS: invalid path to "
1009                                                     "network resource\n");
1010                                 return 1;       /* needs_arg; */
1011                         }
1012                         if ((temp_len = strnlen(value, 300)) < 300) {
1013                                 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1014                                 if (vol->UNC == NULL)
1015                                         return 1;
1016                                 strcpy(vol->UNC, value);
1017                                 if (strncmp(vol->UNC, "//", 2) == 0) {
1018                                         vol->UNC[0] = '\\';
1019                                         vol->UNC[1] = '\\';
1020                                 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1021                                         printk(KERN_WARNING
1022                                                "CIFS: UNC Path does not begin "
1023                                                "with // or \\\\ \n");
1024                                         return 1;
1025                                 }
1026                         } else {
1027                                 printk(KERN_WARNING "CIFS: UNC name too long\n");
1028                                 return 1;
1029                         }
1030                 } else if ((strnicmp(data, "domain", 3) == 0)
1031                            || (strnicmp(data, "workgroup", 5) == 0)) {
1032                         if (!value || !*value) {
1033                                 printk(KERN_WARNING "CIFS: invalid domain name\n");
1034                                 return 1;       /* needs_arg; */
1035                         }
1036                         /* BB are there cases in which a comma can be valid in
1037                         a domain name and need special handling? */
1038                         if (strnlen(value, 256) < 256) {
1039                                 vol->domainname = value;
1040                                 cFYI(1, ("Domain name set"));
1041                         } else {
1042                                 printk(KERN_WARNING "CIFS: domain name too "
1043                                                     "long\n");
1044                                 return 1;
1045                         }
1046                 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1047                         if (!value || !*value) {
1048                                 printk(KERN_WARNING
1049                                         "CIFS: invalid path prefix\n");
1050                                 return 1;       /* needs_argument */
1051                         }
1052                         if ((temp_len = strnlen(value, 1024)) < 1024) {
1053                                 if (value[0] != '/')
1054                                         temp_len++;  /* missing leading slash */
1055                                 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1056                                 if (vol->prepath == NULL)
1057                                         return 1;
1058                                 if (value[0] != '/') {
1059                                         vol->prepath[0] = '/';
1060                                         strcpy(vol->prepath+1, value);
1061                                 } else
1062                                         strcpy(vol->prepath, value);
1063                                 cFYI(1, ("prefix path %s", vol->prepath));
1064                         } else {
1065                                 printk(KERN_WARNING "CIFS: prefix too long\n");
1066                                 return 1;
1067                         }
1068                 } else if (strnicmp(data, "iocharset", 9) == 0) {
1069                         if (!value || !*value) {
1070                                 printk(KERN_WARNING "CIFS: invalid iocharset "
1071                                                     "specified\n");
1072                                 return 1;       /* needs_arg; */
1073                         }
1074                         if (strnlen(value, 65) < 65) {
1075                                 if (strnicmp(value, "default", 7))
1076                                         vol->iocharset = value;
1077                                 /* if iocharset not set then load_nls_default
1078                                    is used by caller */
1079                                 cFYI(1, ("iocharset set to %s", value));
1080                         } else {
1081                                 printk(KERN_WARNING "CIFS: iocharset name "
1082                                                     "too long.\n");
1083                                 return 1;
1084                         }
1085                 } else if (strnicmp(data, "uid", 3) == 0) {
1086                         if (value && *value) {
1087                                 vol->linux_uid =
1088                                         simple_strtoul(value, &value, 0);
1089                                 vol->override_uid = 1;
1090                         }
1091                 } else if (strnicmp(data, "gid", 3) == 0) {
1092                         if (value && *value) {
1093                                 vol->linux_gid =
1094                                         simple_strtoul(value, &value, 0);
1095                                 vol->override_gid = 1;
1096                         }
1097                 } else if (strnicmp(data, "file_mode", 4) == 0) {
1098                         if (value && *value) {
1099                                 vol->file_mode =
1100                                         simple_strtoul(value, &value, 0);
1101                         }
1102                 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1103                         if (value && *value) {
1104                                 vol->dir_mode =
1105                                         simple_strtoul(value, &value, 0);
1106                         }
1107                 } else if (strnicmp(data, "dirmode", 4) == 0) {
1108                         if (value && *value) {
1109                                 vol->dir_mode =
1110                                         simple_strtoul(value, &value, 0);
1111                         }
1112                 } else if (strnicmp(data, "port", 4) == 0) {
1113                         if (value && *value) {
1114                                 vol->port =
1115                                         simple_strtoul(value, &value, 0);
1116                         }
1117                 } else if (strnicmp(data, "rsize", 5) == 0) {
1118                         if (value && *value) {
1119                                 vol->rsize =
1120                                         simple_strtoul(value, &value, 0);
1121                         }
1122                 } else if (strnicmp(data, "wsize", 5) == 0) {
1123                         if (value && *value) {
1124                                 vol->wsize =
1125                                         simple_strtoul(value, &value, 0);
1126                         }
1127                 } else if (strnicmp(data, "sockopt", 5) == 0) {
1128                         if (value && *value) {
1129                                 vol->sockopt =
1130                                         simple_strtoul(value, &value, 0);
1131                         }
1132                 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1133                         if (!value || !*value || (*value == ' ')) {
1134                                 cFYI(1, ("invalid (empty) netbiosname"));
1135                         } else {
1136                                 memset(vol->source_rfc1001_name, 0x20, 15);
1137                                 for (i = 0; i < 15; i++) {
1138                                 /* BB are there cases in which a comma can be
1139                                 valid in this workstation netbios name (and need
1140                                 special handling)? */
1141
1142                                 /* We do not uppercase netbiosname for user */
1143                                         if (value[i] == 0)
1144                                                 break;
1145                                         else
1146                                                 vol->source_rfc1001_name[i] =
1147                                                                 value[i];
1148                                 }
1149                                 /* The string has 16th byte zero still from
1150                                 set at top of the function  */
1151                                 if ((i == 15) && (value[i] != 0))
1152                                         printk(KERN_WARNING "CIFS: netbiosname"
1153                                                 " longer than 15 truncated.\n");
1154                         }
1155                 } else if (strnicmp(data, "servern", 7) == 0) {
1156                         /* servernetbiosname specified override *SMBSERVER */
1157                         if (!value || !*value || (*value == ' ')) {
1158                                 cFYI(1, ("empty server netbiosname specified"));
1159                         } else {
1160                                 /* last byte, type, is 0x20 for servr type */
1161                                 memset(vol->target_rfc1001_name, 0x20, 16);
1162
1163                                 for (i = 0; i < 15; i++) {
1164                                 /* BB are there cases in which a comma can be
1165                                    valid in this workstation netbios name
1166                                    (and need special handling)? */
1167
1168                                 /* user or mount helper must uppercase
1169                                    the netbiosname */
1170                                         if (value[i] == 0)
1171                                                 break;
1172                                         else
1173                                                 vol->target_rfc1001_name[i] =
1174                                                                 value[i];
1175                                 }
1176                                 /* The string has 16th byte zero still from
1177                                    set at top of the function  */
1178                                 if ((i == 15) && (value[i] != 0))
1179                                         printk(KERN_WARNING "CIFS: server net"
1180                                         "biosname longer than 15 truncated.\n");
1181                         }
1182                 } else if (strnicmp(data, "credentials", 4) == 0) {
1183                         /* ignore */
1184                 } else if (strnicmp(data, "version", 3) == 0) {
1185                         /* ignore */
1186                 } else if (strnicmp(data, "guest", 5) == 0) {
1187                         /* ignore */
1188                 } else if (strnicmp(data, "rw", 2) == 0) {
1189                         vol->rw = true;
1190                 } else if (strnicmp(data, "noblocksend", 11) == 0) {
1191                         vol->noblocksnd = 1;
1192                 } else if (strnicmp(data, "noautotune", 10) == 0) {
1193                         vol->noautotune = 1;
1194                 } else if ((strnicmp(data, "suid", 4) == 0) ||
1195                                    (strnicmp(data, "nosuid", 6) == 0) ||
1196                                    (strnicmp(data, "exec", 4) == 0) ||
1197                                    (strnicmp(data, "noexec", 6) == 0) ||
1198                                    (strnicmp(data, "nodev", 5) == 0) ||
1199                                    (strnicmp(data, "noauto", 6) == 0) ||
1200                                    (strnicmp(data, "dev", 3) == 0)) {
1201                         /*  The mount tool or mount.cifs helper (if present)
1202                             uses these opts to set flags, and the flags are read
1203                             by the kernel vfs layer before we get here (ie
1204                             before read super) so there is no point trying to
1205                             parse these options again and set anything and it
1206                             is ok to just ignore them */
1207                         continue;
1208                 } else if (strnicmp(data, "ro", 2) == 0) {
1209                         vol->rw = false;
1210                 } else if (strnicmp(data, "hard", 4) == 0) {
1211                         vol->retry = 1;
1212                 } else if (strnicmp(data, "soft", 4) == 0) {
1213                         vol->retry = 0;
1214                 } else if (strnicmp(data, "perm", 4) == 0) {
1215                         vol->noperm = 0;
1216                 } else if (strnicmp(data, "noperm", 6) == 0) {
1217                         vol->noperm = 1;
1218                 } else if (strnicmp(data, "mapchars", 8) == 0) {
1219                         vol->remap = 1;
1220                 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1221                         vol->remap = 0;
1222                 } else if (strnicmp(data, "sfu", 3) == 0) {
1223                         vol->sfu_emul = 1;
1224                 } else if (strnicmp(data, "nosfu", 5) == 0) {
1225                         vol->sfu_emul = 0;
1226                 } else if (strnicmp(data, "nodfs", 5) == 0) {
1227                         vol->nodfs = 1;
1228                 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1229                         vol->posix_paths = 1;
1230                 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1231                         vol->posix_paths = 0;
1232                 } else if (strnicmp(data, "nounix", 6) == 0) {
1233                         vol->no_linux_ext = 1;
1234                 } else if (strnicmp(data, "nolinux", 7) == 0) {
1235                         vol->no_linux_ext = 1;
1236                 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1237                            (strnicmp(data, "ignorecase", 10)  == 0)) {
1238                         vol->nocase = 1;
1239                 } else if (strnicmp(data, "brl", 3) == 0) {
1240                         vol->nobrl =  0;
1241                 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1242                            (strnicmp(data, "nolock", 6) == 0)) {
1243                         vol->nobrl =  1;
1244                         /* turn off mandatory locking in mode
1245                         if remote locking is turned off since the
1246                         local vfs will do advisory */
1247                         if (vol->file_mode ==
1248                                 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1249                                 vol->file_mode = S_IALLUGO;
1250                 } else if (strnicmp(data, "forcemandatorylock", 9) == 0) {
1251                         /* will take the shorter form "forcemand" as well */
1252                         /* This mount option will force use of mandatory
1253                           (DOS/Windows style) byte range locks, instead of
1254                           using posix advisory byte range locks, even if the
1255                           Unix extensions are available and posix locks would
1256                           be supported otherwise. If Unix extensions are not
1257                           negotiated this has no effect since mandatory locks
1258                           would be used (mandatory locks is all that those
1259                           those servers support) */
1260                         vol->mand_lock = 1;
1261                 } else if (strnicmp(data, "setuids", 7) == 0) {
1262                         vol->setuids = 1;
1263                 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1264                         vol->setuids = 0;
1265                 } else if (strnicmp(data, "dynperm", 7) == 0) {
1266                         vol->dynperm = true;
1267                 } else if (strnicmp(data, "nodynperm", 9) == 0) {
1268                         vol->dynperm = false;
1269                 } else if (strnicmp(data, "nohard", 6) == 0) {
1270                         vol->retry = 0;
1271                 } else if (strnicmp(data, "nosoft", 6) == 0) {
1272                         vol->retry = 1;
1273                 } else if (strnicmp(data, "nointr", 6) == 0) {
1274                         vol->intr = 0;
1275                 } else if (strnicmp(data, "intr", 4) == 0) {
1276                         vol->intr = 1;
1277                 } else if (strnicmp(data, "serverino", 7) == 0) {
1278                         vol->server_ino = 1;
1279                 } else if (strnicmp(data, "noserverino", 9) == 0) {
1280                         vol->server_ino = 0;
1281                 } else if (strnicmp(data, "cifsacl", 7) == 0) {
1282                         vol->cifs_acl = 1;
1283                 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1284                         vol->cifs_acl = 0;
1285                 } else if (strnicmp(data, "acl", 3) == 0) {
1286                         vol->no_psx_acl = 0;
1287                 } else if (strnicmp(data, "noacl", 5) == 0) {
1288                         vol->no_psx_acl = 1;
1289 #ifdef CONFIG_CIFS_EXPERIMENTAL
1290                 } else if (strnicmp(data, "locallease", 6) == 0) {
1291                         vol->local_lease = 1;
1292 #endif
1293                 } else if (strnicmp(data, "sign", 4) == 0) {
1294                         vol->secFlg |= CIFSSEC_MUST_SIGN;
1295                 } else if (strnicmp(data, "seal", 4) == 0) {
1296                         /* we do not do the following in secFlags because seal
1297                            is a per tree connection (mount) not a per socket
1298                            or per-smb connection option in the protocol */
1299                         /* vol->secFlg |= CIFSSEC_MUST_SEAL; */
1300                         vol->seal = 1;
1301                 } else if (strnicmp(data, "direct", 6) == 0) {
1302                         vol->direct_io = 1;
1303                 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
1304                         vol->direct_io = 1;
1305                 } else if (strnicmp(data, "in6_addr", 8) == 0) {
1306                         if (!value || !*value) {
1307                                 vol->in6_addr = NULL;
1308                         } else if (strnlen(value, 49) == 48) {
1309                                 vol->in6_addr = value;
1310                         } else {
1311                                 printk(KERN_WARNING "CIFS: ip v6 address not "
1312                                                     "48 characters long\n");
1313                                 return 1;
1314                         }
1315                 } else if (strnicmp(data, "noac", 4) == 0) {
1316                         printk(KERN_WARNING "CIFS: Mount option noac not "
1317                                 "supported. Instead set "
1318                                 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1319                 } else
1320                         printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1321                                                 data);
1322         }
1323         if (vol->UNC == NULL) {
1324                 if (devname == NULL) {
1325                         printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1326                                                 "target\n");
1327                         return 1;
1328                 }
1329                 if ((temp_len = strnlen(devname, 300)) < 300) {
1330                         vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1331                         if (vol->UNC == NULL)
1332                                 return 1;
1333                         strcpy(vol->UNC, devname);
1334                         if (strncmp(vol->UNC, "//", 2) == 0) {
1335                                 vol->UNC[0] = '\\';
1336                                 vol->UNC[1] = '\\';
1337                         } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1338                                 printk(KERN_WARNING "CIFS: UNC Path does not "
1339                                                     "begin with // or \\\\ \n");
1340                                 return 1;
1341                         }
1342                         value = strpbrk(vol->UNC+2, "/\\");
1343                         if (value)
1344                                 *value = '\\';
1345                 } else {
1346                         printk(KERN_WARNING "CIFS: UNC name too long\n");
1347                         return 1;
1348                 }
1349         }
1350         if (vol->UNCip == NULL)
1351                 vol->UNCip = &vol->UNC[2];
1352
1353         return 0;
1354 }
1355
1356 static struct TCP_Server_Info *
1357 cifs_find_tcp_session(struct sockaddr_storage *addr)
1358 {
1359         struct list_head *tmp;
1360         struct TCP_Server_Info *server;
1361         struct sockaddr_in *addr4 = (struct sockaddr_in *) addr;
1362         struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) addr;
1363
1364         write_lock(&cifs_tcp_ses_lock);
1365         list_for_each(tmp, &cifs_tcp_ses_list) {
1366                 server = list_entry(tmp, struct TCP_Server_Info,
1367                                     tcp_ses_list);
1368                 /*
1369                  * the demux thread can exit on its own while still in CifsNew
1370                  * so don't accept any sockets in that state. Since the
1371                  * tcpStatus never changes back to CifsNew it's safe to check
1372                  * for this without a lock.
1373                  */
1374                 if (server->tcpStatus == CifsNew)
1375                         continue;
1376
1377                 if (addr->ss_family == AF_INET &&
1378                     (addr4->sin_addr.s_addr !=
1379                      server->addr.sockAddr.sin_addr.s_addr))
1380                         continue;
1381                 else if (addr->ss_family == AF_INET6 &&
1382                          memcmp(&server->addr.sockAddr6.sin6_addr,
1383                                 &addr6->sin6_addr, sizeof(addr6->sin6_addr)))
1384                         continue;
1385
1386                 ++server->srv_count;
1387                 write_unlock(&cifs_tcp_ses_lock);
1388                 cFYI(1, ("Existing tcp session with server found"));
1389                 return server;
1390         }
1391         write_unlock(&cifs_tcp_ses_lock);
1392         return NULL;
1393 }
1394
1395 static void
1396 cifs_put_tcp_session(struct TCP_Server_Info *server)
1397 {
1398         struct task_struct *task;
1399
1400         write_lock(&cifs_tcp_ses_lock);
1401         if (--server->srv_count > 0) {
1402                 write_unlock(&cifs_tcp_ses_lock);
1403                 return;
1404         }
1405
1406         list_del_init(&server->tcp_ses_list);
1407         write_unlock(&cifs_tcp_ses_lock);
1408
1409         spin_lock(&GlobalMid_Lock);
1410         server->tcpStatus = CifsExiting;
1411         spin_unlock(&GlobalMid_Lock);
1412
1413         task = xchg(&server->tsk, NULL);
1414         if (task)
1415                 force_sig(SIGKILL, task);
1416 }
1417
1418 static struct TCP_Server_Info *
1419 cifs_get_tcp_session(struct smb_vol *volume_info)
1420 {
1421         struct TCP_Server_Info *tcp_ses = NULL;
1422         struct sockaddr_storage addr;
1423         struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
1424         struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
1425         int rc;
1426
1427         memset(&addr, 0, sizeof(struct sockaddr_storage));
1428
1429         if (volume_info->UNCip && volume_info->UNC) {
1430                 rc = cifs_inet_pton(AF_INET, volume_info->UNCip,
1431                                     &sin_server->sin_addr.s_addr);
1432
1433                 if (rc <= 0) {
1434                         /* not ipv4 address, try ipv6 */
1435                         rc = cifs_inet_pton(AF_INET6, volume_info->UNCip,
1436                                             &sin_server6->sin6_addr.in6_u);
1437                         if (rc > 0)
1438                                 addr.ss_family = AF_INET6;
1439                 } else {
1440                         addr.ss_family = AF_INET;
1441                 }
1442
1443                 if (rc <= 0) {
1444                         /* we failed translating address */
1445                         rc = -EINVAL;
1446                         goto out_err;
1447                 }
1448
1449                 cFYI(1, ("UNC: %s ip: %s", volume_info->UNC,
1450                          volume_info->UNCip));
1451         } else if (volume_info->UNCip) {
1452                 /* BB using ip addr as tcp_ses name to connect to the
1453                    DFS root below */
1454                 cERROR(1, ("Connecting to DFS root not implemented yet"));
1455                 rc = -EINVAL;
1456                 goto out_err;
1457         } else /* which tcp_sess DFS root would we conect to */ {
1458                 cERROR(1,
1459                        ("CIFS mount error: No UNC path (e.g. -o "
1460                         "unc=//192.168.1.100/public) specified"));
1461                 rc = -EINVAL;
1462                 goto out_err;
1463         }
1464
1465         /* see if we already have a matching tcp_ses */
1466         tcp_ses = cifs_find_tcp_session(&addr);
1467         if (tcp_ses)
1468                 return tcp_ses;
1469
1470         tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1471         if (!tcp_ses) {
1472                 rc = -ENOMEM;
1473                 goto out_err;
1474         }
1475
1476         tcp_ses->hostname = extract_hostname(volume_info->UNC);
1477         if (IS_ERR(tcp_ses->hostname)) {
1478                 rc = PTR_ERR(tcp_ses->hostname);
1479                 goto out_err;
1480         }
1481
1482         tcp_ses->noblocksnd = volume_info->noblocksnd;
1483         tcp_ses->noautotune = volume_info->noautotune;
1484         atomic_set(&tcp_ses->inFlight, 0);
1485         init_waitqueue_head(&tcp_ses->response_q);
1486         init_waitqueue_head(&tcp_ses->request_q);
1487         INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
1488         mutex_init(&tcp_ses->srv_mutex);
1489         memcpy(tcp_ses->workstation_RFC1001_name,
1490                 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1491         memcpy(tcp_ses->server_RFC1001_name,
1492                 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1493         tcp_ses->sequence_number = 0;
1494         INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
1495         INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
1496
1497         /*
1498          * at this point we are the only ones with the pointer
1499          * to the struct since the kernel thread not created yet
1500          * no need to spinlock this init of tcpStatus or srv_count
1501          */
1502         tcp_ses->tcpStatus = CifsNew;
1503         ++tcp_ses->srv_count;
1504
1505         if (addr.ss_family == AF_INET6) {
1506                 cFYI(1, ("attempting ipv6 connect"));
1507                 /* BB should we allow ipv6 on port 139? */
1508                 /* other OS never observed in Wild doing 139 with v6 */
1509                 memcpy(&tcp_ses->addr.sockAddr6, sin_server6,
1510                         sizeof(struct sockaddr_in6));
1511                 sin_server6->sin6_port = htons(volume_info->port);
1512                 rc = ipv6_connect(tcp_ses);
1513         } else {
1514                 memcpy(&tcp_ses->addr.sockAddr, sin_server,
1515                         sizeof(struct sockaddr_in));
1516                 sin_server->sin_port = htons(volume_info->port);
1517                 rc = ipv4_connect(tcp_ses);
1518         }
1519         if (rc < 0) {
1520                 cERROR(1, ("Error connecting to socket. Aborting operation"));
1521                 goto out_err;
1522         }
1523
1524         /*
1525          * since we're in a cifs function already, we know that
1526          * this will succeed. No need for try_module_get().
1527          */
1528         __module_get(THIS_MODULE);
1529         tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread,
1530                                   tcp_ses, "cifsd");
1531         if (IS_ERR(tcp_ses->tsk)) {
1532                 rc = PTR_ERR(tcp_ses->tsk);
1533                 cERROR(1, ("error %d create cifsd thread", rc));
1534                 module_put(THIS_MODULE);
1535                 goto out_err;
1536         }
1537
1538         /* thread spawned, put it on the list */
1539         write_lock(&cifs_tcp_ses_lock);
1540         list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
1541         write_unlock(&cifs_tcp_ses_lock);
1542
1543         return tcp_ses;
1544
1545 out_err:
1546         if (tcp_ses) {
1547                 kfree(tcp_ses->hostname);
1548                 if (tcp_ses->ssocket)
1549                         sock_release(tcp_ses->ssocket);
1550                 kfree(tcp_ses);
1551         }
1552         return ERR_PTR(rc);
1553 }
1554
1555 static struct cifsSesInfo *
1556 cifs_find_smb_ses(struct TCP_Server_Info *server, char *username)
1557 {
1558         struct list_head *tmp;
1559         struct cifsSesInfo *ses;
1560
1561         write_lock(&cifs_tcp_ses_lock);
1562         list_for_each(tmp, &server->smb_ses_list) {
1563                 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
1564                 if (strncmp(ses->userName, username, MAX_USERNAME_SIZE))
1565                         continue;
1566
1567                 ++ses->ses_count;
1568                 write_unlock(&cifs_tcp_ses_lock);
1569                 return ses;
1570         }
1571         write_unlock(&cifs_tcp_ses_lock);
1572         return NULL;
1573 }
1574
1575 static void
1576 cifs_put_smb_ses(struct cifsSesInfo *ses)
1577 {
1578         int xid;
1579         struct TCP_Server_Info *server = ses->server;
1580
1581         write_lock(&cifs_tcp_ses_lock);
1582         if (--ses->ses_count > 0) {
1583                 write_unlock(&cifs_tcp_ses_lock);
1584                 return;
1585         }
1586
1587         list_del_init(&ses->smb_ses_list);
1588         write_unlock(&cifs_tcp_ses_lock);
1589
1590         if (ses->status == CifsGood) {
1591                 xid = GetXid();
1592                 CIFSSMBLogoff(xid, ses);
1593                 _FreeXid(xid);
1594         }
1595         sesInfoFree(ses);
1596         cifs_put_tcp_session(server);
1597 }
1598
1599 static struct cifsTconInfo *
1600 cifs_find_tcon(struct cifsSesInfo *ses, const char *unc)
1601 {
1602         struct list_head *tmp;
1603         struct cifsTconInfo *tcon;
1604
1605         write_lock(&cifs_tcp_ses_lock);
1606         list_for_each(tmp, &ses->tcon_list) {
1607                 tcon = list_entry(tmp, struct cifsTconInfo, tcon_list);
1608                 if (tcon->tidStatus == CifsExiting)
1609                         continue;
1610                 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
1611                         continue;
1612
1613                 ++tcon->tc_count;
1614                 write_unlock(&cifs_tcp_ses_lock);
1615                 return tcon;
1616         }
1617         write_unlock(&cifs_tcp_ses_lock);
1618         return NULL;
1619 }
1620
1621 static void
1622 cifs_put_tcon(struct cifsTconInfo *tcon)
1623 {
1624         int xid;
1625         struct cifsSesInfo *ses = tcon->ses;
1626
1627         write_lock(&cifs_tcp_ses_lock);
1628         if (--tcon->tc_count > 0) {
1629                 write_unlock(&cifs_tcp_ses_lock);
1630                 return;
1631         }
1632
1633         list_del_init(&tcon->tcon_list);
1634         write_unlock(&cifs_tcp_ses_lock);
1635
1636         xid = GetXid();
1637         CIFSSMBTDis(xid, tcon);
1638         _FreeXid(xid);
1639
1640         DeleteTconOplockQEntries(tcon);
1641         tconInfoFree(tcon);
1642         cifs_put_smb_ses(ses);
1643 }
1644
1645 int
1646 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
1647              const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
1648              struct dfs_info3_param **preferrals, int remap)
1649 {
1650         char *temp_unc;
1651         int rc = 0;
1652
1653         *pnum_referrals = 0;
1654         *preferrals = NULL;
1655
1656         if (pSesInfo->ipc_tid == 0) {
1657                 temp_unc = kmalloc(2 /* for slashes */ +
1658                         strnlen(pSesInfo->serverName,
1659                                 SERVER_NAME_LEN_WITH_NULL * 2)
1660                                  + 1 + 4 /* slash IPC$ */  + 2,
1661                                 GFP_KERNEL);
1662                 if (temp_unc == NULL)
1663                         return -ENOMEM;
1664                 temp_unc[0] = '\\';
1665                 temp_unc[1] = '\\';
1666                 strcpy(temp_unc + 2, pSesInfo->serverName);
1667                 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1668                 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1669                 cFYI(1,
1670                      ("CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid));
1671                 kfree(temp_unc);
1672         }
1673         if (rc == 0)
1674                 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1675                                      pnum_referrals, nls_codepage, remap);
1676         /* BB map targetUNCs to dfs_info3 structures, here or
1677                 in CIFSGetDFSRefer BB */
1678
1679         return rc;
1680 }
1681
1682 #ifdef CONFIG_DEBUG_LOCK_ALLOC
1683 static struct lock_class_key cifs_key[2];
1684 static struct lock_class_key cifs_slock_key[2];
1685
1686 static inline void
1687 cifs_reclassify_socket4(struct socket *sock)
1688 {
1689         struct sock *sk = sock->sk;
1690         BUG_ON(sock_owned_by_user(sk));
1691         sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
1692                 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
1693 }
1694
1695 static inline void
1696 cifs_reclassify_socket6(struct socket *sock)
1697 {
1698         struct sock *sk = sock->sk;
1699         BUG_ON(sock_owned_by_user(sk));
1700         sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
1701                 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
1702 }
1703 #else
1704 static inline void
1705 cifs_reclassify_socket4(struct socket *sock)
1706 {
1707 }
1708
1709 static inline void
1710 cifs_reclassify_socket6(struct socket *sock)
1711 {
1712 }
1713 #endif
1714
1715 /* See RFC1001 section 14 on representation of Netbios names */
1716 static void rfc1002mangle(char *target, char *source, unsigned int length)
1717 {
1718         unsigned int i, j;
1719
1720         for (i = 0, j = 0; i < (length); i++) {
1721                 /* mask a nibble at a time and encode */
1722                 target[j] = 'A' + (0x0F & (source[i] >> 4));
1723                 target[j+1] = 'A' + (0x0F & source[i]);
1724                 j += 2;
1725         }
1726
1727 }
1728
1729
1730 static int
1731 ipv4_connect(struct TCP_Server_Info *server)
1732 {
1733         int rc = 0;
1734         bool connected = false;
1735         __be16 orig_port = 0;
1736         struct socket *socket = server->ssocket;
1737
1738         if (socket == NULL) {
1739                 rc = sock_create_kern(PF_INET, SOCK_STREAM,
1740                                       IPPROTO_TCP, &socket);
1741                 if (rc < 0) {
1742                         cERROR(1, ("Error %d creating socket", rc));
1743                         return rc;
1744                 }
1745
1746                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1747                 cFYI(1, ("Socket created"));
1748                 server->ssocket = socket;
1749                 socket->sk->sk_allocation = GFP_NOFS;
1750                 cifs_reclassify_socket4(socket);
1751         }
1752
1753         /* user overrode default port */
1754         if (server->addr.sockAddr.sin_port) {
1755                 rc = socket->ops->connect(socket, (struct sockaddr *)
1756                                           &server->addr.sockAddr,
1757                                           sizeof(struct sockaddr_in), 0);
1758                 if (rc >= 0)
1759                         connected = true;
1760         }
1761
1762         if (!connected) {
1763                 /* save original port so we can retry user specified port
1764                         later if fall back ports fail this time  */
1765                 orig_port = server->addr.sockAddr.sin_port;
1766
1767                 /* do not retry on the same port we just failed on */
1768                 if (server->addr.sockAddr.sin_port != htons(CIFS_PORT)) {
1769                         server->addr.sockAddr.sin_port = htons(CIFS_PORT);
1770                         rc = socket->ops->connect(socket,
1771                                                 (struct sockaddr *)
1772                                                 &server->addr.sockAddr,
1773                                                 sizeof(struct sockaddr_in), 0);
1774                         if (rc >= 0)
1775                                 connected = true;
1776                 }
1777         }
1778         if (!connected) {
1779                 server->addr.sockAddr.sin_port = htons(RFC1001_PORT);
1780                 rc = socket->ops->connect(socket, (struct sockaddr *)
1781                                               &server->addr.sockAddr,
1782                                               sizeof(struct sockaddr_in), 0);
1783                 if (rc >= 0)
1784                         connected = true;
1785         }
1786
1787         /* give up here - unless we want to retry on different
1788                 protocol families some day */
1789         if (!connected) {
1790                 if (orig_port)
1791                         server->addr.sockAddr.sin_port = orig_port;
1792                 cFYI(1, ("Error %d connecting to server via ipv4", rc));
1793                 sock_release(socket);
1794                 server->ssocket = NULL;
1795                 return rc;
1796         }
1797
1798
1799         /*
1800          * Eventually check for other socket options to change from
1801          *  the default. sock_setsockopt not used because it expects
1802          *  user space buffer
1803          */
1804         socket->sk->sk_rcvtimeo = 7 * HZ;
1805         socket->sk->sk_sndtimeo = 5 * HZ;
1806
1807         /* make the bufsizes depend on wsize/rsize and max requests */
1808         if (server->noautotune) {
1809                 if (socket->sk->sk_sndbuf < (200 * 1024))
1810                         socket->sk->sk_sndbuf = 200 * 1024;
1811                 if (socket->sk->sk_rcvbuf < (140 * 1024))
1812                         socket->sk->sk_rcvbuf = 140 * 1024;
1813         }
1814
1815          cFYI(1, ("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
1816                  socket->sk->sk_sndbuf,
1817                  socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo));
1818
1819         /* send RFC1001 sessinit */
1820         if (server->addr.sockAddr.sin_port == htons(RFC1001_PORT)) {
1821                 /* some servers require RFC1001 sessinit before sending
1822                 negprot - BB check reconnection in case where second
1823                 sessinit is sent but no second negprot */
1824                 struct rfc1002_session_packet *ses_init_buf;
1825                 struct smb_hdr *smb_buf;
1826                 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
1827                                        GFP_KERNEL);
1828                 if (ses_init_buf) {
1829                         ses_init_buf->trailer.session_req.called_len = 32;
1830                         if (server->server_RFC1001_name &&
1831                             server->server_RFC1001_name[0] != 0)
1832                                 rfc1002mangle(ses_init_buf->trailer.
1833                                                 session_req.called_name,
1834                                               server->server_RFC1001_name,
1835                                               RFC1001_NAME_LEN_WITH_NULL);
1836                         else
1837                                 rfc1002mangle(ses_init_buf->trailer.
1838                                                 session_req.called_name,
1839                                               DEFAULT_CIFS_CALLED_NAME,
1840                                               RFC1001_NAME_LEN_WITH_NULL);
1841
1842                         ses_init_buf->trailer.session_req.calling_len = 32;
1843
1844                         /* calling name ends in null (byte 16) from old smb
1845                         convention. */
1846                         if (server->workstation_RFC1001_name &&
1847                             server->workstation_RFC1001_name[0] != 0)
1848                                 rfc1002mangle(ses_init_buf->trailer.
1849                                                 session_req.calling_name,
1850                                               server->workstation_RFC1001_name,
1851                                               RFC1001_NAME_LEN_WITH_NULL);
1852                         else
1853                                 rfc1002mangle(ses_init_buf->trailer.
1854                                                 session_req.calling_name,
1855                                               "LINUX_CIFS_CLNT",
1856                                               RFC1001_NAME_LEN_WITH_NULL);
1857
1858                         ses_init_buf->trailer.session_req.scope1 = 0;
1859                         ses_init_buf->trailer.session_req.scope2 = 0;
1860                         smb_buf = (struct smb_hdr *)ses_init_buf;
1861                         /* sizeof RFC1002_SESSION_REQUEST with no scope */
1862                         smb_buf->smb_buf_length = 0x81000044;
1863                         rc = smb_send(server, smb_buf, 0x44);
1864                         kfree(ses_init_buf);
1865                         msleep(1); /* RFC1001 layer in at least one server
1866                                       requires very short break before negprot
1867                                       presumably because not expecting negprot
1868                                       to follow so fast.  This is a simple
1869                                       solution that works without
1870                                       complicating the code and causes no
1871                                       significant slowing down on mount
1872                                       for everyone else */
1873                 }
1874                 /* else the negprot may still work without this
1875                 even though malloc failed */
1876
1877         }
1878
1879         return rc;
1880 }
1881
1882 static int
1883 ipv6_connect(struct TCP_Server_Info *server)
1884 {
1885         int rc = 0;
1886         bool connected = false;
1887         __be16 orig_port = 0;
1888         struct socket *socket = server->ssocket;
1889
1890         if (socket == NULL) {
1891                 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
1892                                       IPPROTO_TCP, &socket);
1893                 if (rc < 0) {
1894                         cERROR(1, ("Error %d creating ipv6 socket", rc));
1895                         socket = NULL;
1896                         return rc;
1897                 }
1898
1899                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1900                 cFYI(1, ("ipv6 Socket created"));
1901                 server->ssocket = socket;
1902                 socket->sk->sk_allocation = GFP_NOFS;
1903                 cifs_reclassify_socket6(socket);
1904         }
1905
1906         /* user overrode default port */
1907         if (server->addr.sockAddr6.sin6_port) {
1908                 rc = socket->ops->connect(socket,
1909                                 (struct sockaddr *) &server->addr.sockAddr6,
1910                                 sizeof(struct sockaddr_in6), 0);
1911                 if (rc >= 0)
1912                         connected = true;
1913         }
1914
1915         if (!connected) {
1916                 /* save original port so we can retry user specified port
1917                         later if fall back ports fail this time  */
1918
1919                 orig_port = server->addr.sockAddr6.sin6_port;
1920                 /* do not retry on the same port we just failed on */
1921                 if (server->addr.sockAddr6.sin6_port != htons(CIFS_PORT)) {
1922                         server->addr.sockAddr6.sin6_port = htons(CIFS_PORT);
1923                         rc = socket->ops->connect(socket, (struct sockaddr *)
1924                                         &server->addr.sockAddr6,
1925                                         sizeof(struct sockaddr_in6), 0);
1926                         if (rc >= 0)
1927                                 connected = true;
1928                 }
1929         }
1930         if (!connected) {
1931                 server->addr.sockAddr6.sin6_port = htons(RFC1001_PORT);
1932                 rc = socket->ops->connect(socket, (struct sockaddr *)
1933                                 &server->addr.sockAddr6,
1934                                 sizeof(struct sockaddr_in6), 0);
1935                 if (rc >= 0)
1936                         connected = true;
1937         }
1938
1939         /* give up here - unless we want to retry on different
1940                 protocol families some day */
1941         if (!connected) {
1942                 if (orig_port)
1943                         server->addr.sockAddr6.sin6_port = orig_port;
1944                 cFYI(1, ("Error %d connecting to server via ipv6", rc));
1945                 sock_release(socket);
1946                 server->ssocket = NULL;
1947                 return rc;
1948         }
1949
1950         /*
1951          * Eventually check for other socket options to change from
1952          * the default. sock_setsockopt not used because it expects
1953          * user space buffer
1954          */
1955         socket->sk->sk_rcvtimeo = 7 * HZ;
1956         socket->sk->sk_sndtimeo = 5 * HZ;
1957         server->ssocket = socket;
1958
1959         return rc;
1960 }
1961
1962 void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
1963                           struct super_block *sb, struct smb_vol *vol_info)
1964 {
1965         /* if we are reconnecting then should we check to see if
1966          * any requested capabilities changed locally e.g. via
1967          * remount but we can not do much about it here
1968          * if they have (even if we could detect it by the following)
1969          * Perhaps we could add a backpointer to array of sb from tcon
1970          * or if we change to make all sb to same share the same
1971          * sb as NFS - then we only have one backpointer to sb.
1972          * What if we wanted to mount the server share twice once with
1973          * and once without posixacls or posix paths? */
1974         __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1975
1976         if (vol_info && vol_info->no_linux_ext) {
1977                 tcon->fsUnixInfo.Capability = 0;
1978                 tcon->unix_ext = 0; /* Unix Extensions disabled */
1979                 cFYI(1, ("Linux protocol extensions disabled"));
1980                 return;
1981         } else if (vol_info)
1982                 tcon->unix_ext = 1; /* Unix Extensions supported */
1983
1984         if (tcon->unix_ext == 0) {
1985                 cFYI(1, ("Unix extensions disabled so not set on reconnect"));
1986                 return;
1987         }
1988
1989         if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
1990                 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1991
1992                 /* check for reconnect case in which we do not
1993                    want to change the mount behavior if we can avoid it */
1994                 if (vol_info == NULL) {
1995                         /* turn off POSIX ACL and PATHNAMES if not set
1996                            originally at mount time */
1997                         if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
1998                                 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1999                         if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2000                                 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2001                                         cERROR(1, ("POSIXPATH support change"));
2002                                 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2003                         } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2004                                 cERROR(1, ("possible reconnect error"));
2005                                 cERROR(1,
2006                                         ("server disabled POSIX path support"));
2007                         }
2008                 }
2009
2010                 cap &= CIFS_UNIX_CAP_MASK;
2011                 if (vol_info && vol_info->no_psx_acl)
2012                         cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
2013                 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
2014                         cFYI(1, ("negotiated posix acl support"));
2015                         if (sb)
2016                                 sb->s_flags |= MS_POSIXACL;
2017                 }
2018
2019                 if (vol_info && vol_info->posix_paths == 0)
2020                         cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2021                 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
2022                         cFYI(1, ("negotiate posix pathnames"));
2023                         if (sb)
2024                                 CIFS_SB(sb)->mnt_cifs_flags |=
2025                                         CIFS_MOUNT_POSIX_PATHS;
2026                 }
2027
2028                 /* We might be setting the path sep back to a different
2029                 form if we are reconnecting and the server switched its
2030                 posix path capability for this share */
2031                 if (sb && (CIFS_SB(sb)->prepathlen > 0))
2032                         CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
2033
2034                 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
2035                         if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
2036                                 CIFS_SB(sb)->rsize = 127 * 1024;
2037                                 cFYI(DBG2,
2038                                         ("larger reads not supported by srv"));
2039                         }
2040                 }
2041
2042
2043                 cFYI(1, ("Negotiate caps 0x%x", (int)cap));
2044 #ifdef CONFIG_CIFS_DEBUG2
2045                 if (cap & CIFS_UNIX_FCNTL_CAP)
2046                         cFYI(1, ("FCNTL cap"));
2047                 if (cap & CIFS_UNIX_EXTATTR_CAP)
2048                         cFYI(1, ("EXTATTR cap"));
2049                 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2050                         cFYI(1, ("POSIX path cap"));
2051                 if (cap & CIFS_UNIX_XATTR_CAP)
2052                         cFYI(1, ("XATTR cap"));
2053                 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
2054                         cFYI(1, ("POSIX ACL cap"));
2055                 if (cap & CIFS_UNIX_LARGE_READ_CAP)
2056                         cFYI(1, ("very large read cap"));
2057                 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
2058                         cFYI(1, ("very large write cap"));
2059 #endif /* CIFS_DEBUG2 */
2060                 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
2061                         if (vol_info == NULL) {
2062                                 cFYI(1, ("resetting capabilities failed"));
2063                         } else
2064                                 cERROR(1, ("Negotiating Unix capabilities "
2065                                            "with the server failed.  Consider "
2066                                            "mounting with the Unix Extensions\n"
2067                                            "disabled, if problems are found, "
2068                                            "by specifying the nounix mount "
2069                                            "option."));
2070
2071                 }
2072         }
2073 }
2074
2075 static void
2076 convert_delimiter(char *path, char delim)
2077 {
2078         int i;
2079         char old_delim;
2080
2081         if (path == NULL)
2082                 return;
2083
2084         if (delim == '/')
2085                 old_delim = '\\';
2086         else
2087                 old_delim = '/';
2088
2089         for (i = 0; path[i] != '\0'; i++) {
2090                 if (path[i] == old_delim)
2091                         path[i] = delim;
2092         }
2093 }
2094
2095 static void setup_cifs_sb(struct smb_vol *pvolume_info,
2096                           struct cifs_sb_info *cifs_sb)
2097 {
2098         if (pvolume_info->rsize > CIFSMaxBufSize) {
2099                 cERROR(1, ("rsize %d too large, using MaxBufSize",
2100                         pvolume_info->rsize));
2101                 cifs_sb->rsize = CIFSMaxBufSize;
2102         } else if ((pvolume_info->rsize) &&
2103                         (pvolume_info->rsize <= CIFSMaxBufSize))
2104                 cifs_sb->rsize = pvolume_info->rsize;
2105         else /* default */
2106                 cifs_sb->rsize = CIFSMaxBufSize;
2107
2108         if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
2109                 cERROR(1, ("wsize %d too large, using 4096 instead",
2110                           pvolume_info->wsize));
2111                 cifs_sb->wsize = 4096;
2112         } else if (pvolume_info->wsize)
2113                 cifs_sb->wsize = pvolume_info->wsize;
2114         else
2115                 cifs_sb->wsize = min_t(const int,
2116                                         PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2117                                         127*1024);
2118                 /* old default of CIFSMaxBufSize was too small now
2119                    that SMB Write2 can send multiple pages in kvec.
2120                    RFC1001 does not describe what happens when frame
2121                    bigger than 128K is sent so use that as max in
2122                    conjunction with 52K kvec constraint on arch with 4K
2123                    page size  */
2124
2125         if (cifs_sb->rsize < 2048) {
2126                 cifs_sb->rsize = 2048;
2127                 /* Windows ME may prefer this */
2128                 cFYI(1, ("readsize set to minimum: 2048"));
2129         }
2130         /* calculate prepath */
2131         cifs_sb->prepath = pvolume_info->prepath;
2132         if (cifs_sb->prepath) {
2133                 cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2134                 /* we can not convert the / to \ in the path
2135                 separators in the prefixpath yet because we do not
2136                 know (until reset_cifs_unix_caps is called later)
2137                 whether POSIX PATH CAP is available. We normalize
2138                 the / to \ after reset_cifs_unix_caps is called */
2139                 pvolume_info->prepath = NULL;
2140         } else
2141                 cifs_sb->prepathlen = 0;
2142         cifs_sb->mnt_uid = pvolume_info->linux_uid;
2143         cifs_sb->mnt_gid = pvolume_info->linux_gid;
2144         cifs_sb->mnt_file_mode = pvolume_info->file_mode;
2145         cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
2146         cFYI(1, ("file mode: 0x%x  dir mode: 0x%x",
2147                 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode));
2148
2149         if (pvolume_info->noperm)
2150                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2151         if (pvolume_info->setuids)
2152                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2153         if (pvolume_info->server_ino)
2154                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2155         if (pvolume_info->remap)
2156                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2157         if (pvolume_info->no_xattr)
2158                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2159         if (pvolume_info->sfu_emul)
2160                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2161         if (pvolume_info->nobrl)
2162                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2163         if (pvolume_info->mand_lock)
2164                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
2165         if (pvolume_info->cifs_acl)
2166                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2167         if (pvolume_info->override_uid)
2168                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2169         if (pvolume_info->override_gid)
2170                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2171         if (pvolume_info->dynperm)
2172                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
2173         if (pvolume_info->direct_io) {
2174                 cFYI(1, ("mounting share using direct i/o"));
2175                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2176         }
2177
2178         if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
2179                 cERROR(1, ("mount option dynperm ignored if cifsacl "
2180                            "mount option supported"));
2181 }
2182
2183 int
2184 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
2185            char *mount_data, const char *devname)
2186 {
2187         int rc = 0;
2188         int xid;
2189         struct smb_vol *volume_info;
2190         struct cifsSesInfo *pSesInfo = NULL;
2191         struct cifsTconInfo *tcon = NULL;
2192         struct TCP_Server_Info *srvTcp = NULL;
2193
2194         xid = GetXid();
2195
2196         volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
2197         if (!volume_info) {
2198                 rc = -ENOMEM;
2199                 goto out;
2200         }
2201
2202         if (cifs_parse_mount_options(mount_data, devname, volume_info)) {
2203                 rc = -EINVAL;
2204                 goto out;
2205         }
2206
2207         if (volume_info->nullauth) {
2208                 cFYI(1, ("null user"));
2209                 volume_info->username = "";
2210         } else if (volume_info->username) {
2211                 /* BB fixme parse for domain name here */
2212                 cFYI(1, ("Username: %s", volume_info->username));
2213         } else {
2214                 cifserror("No username specified");
2215         /* In userspace mount helper we can get user name from alternate
2216            locations such as env variables and files on disk */
2217                 rc = -EINVAL;
2218                 goto out;
2219         }
2220
2221
2222         /* this is needed for ASCII cp to Unicode converts */
2223         if (volume_info->iocharset == NULL) {
2224                 cifs_sb->local_nls = load_nls_default();
2225         /* load_nls_default can not return null */
2226         } else {
2227                 cifs_sb->local_nls = load_nls(volume_info->iocharset);
2228                 if (cifs_sb->local_nls == NULL) {
2229                         cERROR(1, ("CIFS mount error: iocharset %s not found",
2230                                  volume_info->iocharset));
2231                         rc = -ELIBACC;
2232                         goto out;
2233                 }
2234         }
2235
2236         /* get a reference to a tcp session */
2237         srvTcp = cifs_get_tcp_session(volume_info);
2238         if (IS_ERR(srvTcp)) {
2239                 rc = PTR_ERR(srvTcp);
2240                 goto out;
2241         }
2242
2243         pSesInfo = cifs_find_smb_ses(srvTcp, volume_info->username);
2244         if (pSesInfo) {
2245                 cFYI(1, ("Existing smb sess found (status=%d)",
2246                         pSesInfo->status));
2247                 /*
2248                  * The existing SMB session already has a reference to srvTcp,
2249                  * so we can put back the extra one we got before
2250                  */
2251                 cifs_put_tcp_session(srvTcp);
2252
2253                 down(&pSesInfo->sesSem);
2254                 if (pSesInfo->need_reconnect) {
2255                         cFYI(1, ("Session needs reconnect"));
2256                         rc = cifs_setup_session(xid, pSesInfo,
2257                                                 cifs_sb->local_nls);
2258                 }
2259                 up(&pSesInfo->sesSem);
2260         } else if (!rc) {
2261                 cFYI(1, ("Existing smb sess not found"));
2262                 pSesInfo = sesInfoAlloc();
2263                 if (pSesInfo == NULL) {
2264                         rc = -ENOMEM;
2265                         goto mount_fail_check;
2266                 }
2267
2268                 /* new SMB session uses our srvTcp ref */
2269                 pSesInfo->server = srvTcp;
2270                 if (srvTcp->addr.sockAddr6.sin6_family == AF_INET6)
2271                         sprintf(pSesInfo->serverName, "%pI6",
2272                                 &srvTcp->addr.sockAddr6.sin6_addr);
2273                 else
2274                         sprintf(pSesInfo->serverName, "%pI4",
2275                                 &srvTcp->addr.sockAddr.sin_addr.s_addr);
2276
2277                 write_lock(&cifs_tcp_ses_lock);
2278                 list_add(&pSesInfo->smb_ses_list, &srvTcp->smb_ses_list);
2279                 write_unlock(&cifs_tcp_ses_lock);
2280
2281                 /* volume_info->password freed at unmount */
2282                 if (volume_info->password) {
2283                         pSesInfo->password = kstrdup(volume_info->password,
2284                                                      GFP_KERNEL);
2285                         if (!pSesInfo->password) {
2286                                 rc = -ENOMEM;
2287                                 goto mount_fail_check;
2288                         }
2289                 }
2290                 if (volume_info->username)
2291                         strncpy(pSesInfo->userName, volume_info->username,
2292                                 MAX_USERNAME_SIZE);
2293                 if (volume_info->domainname) {
2294                         int len = strlen(volume_info->domainname);
2295                         pSesInfo->domainName = kmalloc(len + 1, GFP_KERNEL);
2296                         if (pSesInfo->domainName)
2297                                 strcpy(pSesInfo->domainName,
2298                                         volume_info->domainname);
2299                 }
2300                 pSesInfo->linux_uid = volume_info->linux_uid;
2301                 pSesInfo->overrideSecFlg = volume_info->secFlg;
2302                 down(&pSesInfo->sesSem);
2303
2304                 /* BB FIXME need to pass vol->secFlgs BB */
2305                 rc = cifs_setup_session(xid, pSesInfo,
2306                                         cifs_sb->local_nls);
2307                 up(&pSesInfo->sesSem);
2308         }
2309
2310         /* search for existing tcon to this server share */
2311         if (!rc) {
2312                 setup_cifs_sb(volume_info, cifs_sb);
2313
2314                 tcon = cifs_find_tcon(pSesInfo, volume_info->UNC);
2315                 if (tcon) {
2316                         cFYI(1, ("Found match on UNC path"));
2317                         /* existing tcon already has a reference */
2318                         cifs_put_smb_ses(pSesInfo);
2319                         if (tcon->seal != volume_info->seal)
2320                                 cERROR(1, ("transport encryption setting "
2321                                            "conflicts with existing tid"));
2322                 } else {
2323                         tcon = tconInfoAlloc();
2324                         if (tcon == NULL) {
2325                                 rc = -ENOMEM;
2326                                 goto mount_fail_check;
2327                         }
2328
2329                         tcon->ses = pSesInfo;
2330                         if (volume_info->password) {
2331                                 tcon->password = kstrdup(volume_info->password,
2332                                                          GFP_KERNEL);
2333                                 if (!tcon->password) {
2334                                         rc = -ENOMEM;
2335                                         goto mount_fail_check;
2336                                 }
2337                         }
2338
2339                         /* check for null share name ie connect to dfs root */
2340                         if ((strchr(volume_info->UNC + 3, '\\') == NULL)
2341                             && (strchr(volume_info->UNC + 3, '/') == NULL)) {
2342                                 /* rc = connect_to_dfs_path(...) */
2343                                 cFYI(1, ("DFS root not supported"));
2344                                 rc = -ENODEV;
2345                                 goto mount_fail_check;
2346                         } else {
2347                                 /* BB Do we need to wrap sesSem around
2348                                  * this TCon call and Unix SetFS as
2349                                  * we do on SessSetup and reconnect? */
2350                                 rc = CIFSTCon(xid, pSesInfo, volume_info->UNC,
2351                                               tcon, cifs_sb->local_nls);
2352                                 cFYI(1, ("CIFS Tcon rc = %d", rc));
2353                                 if (volume_info->nodfs) {
2354                                         tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
2355                                         cFYI(1, ("DFS disabled (%d)",
2356                                                 tcon->Flags));
2357                                 }
2358                         }
2359                         if (rc)
2360                                 goto mount_fail_check;
2361                         tcon->seal = volume_info->seal;
2362                         write_lock(&cifs_tcp_ses_lock);
2363                         list_add(&tcon->tcon_list, &pSesInfo->tcon_list);
2364                         write_unlock(&cifs_tcp_ses_lock);
2365                 }
2366
2367                 /* we can have only one retry value for a connection
2368                    to a share so for resources mounted more than once
2369                    to the same server share the last value passed in
2370                    for the retry flag is used */
2371                 tcon->retry = volume_info->retry;
2372                 tcon->nocase = volume_info->nocase;
2373                 tcon->local_lease = volume_info->local_lease;
2374         }
2375         if (pSesInfo) {
2376                 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
2377                         sb->s_maxbytes = (u64) 1 << 63;
2378                 } else
2379                         sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
2380         }
2381
2382         /* BB FIXME fix time_gran to be larger for LANMAN sessions */
2383         sb->s_time_gran = 100;
2384
2385 mount_fail_check:
2386         /* on error free sesinfo and tcon struct if needed */
2387         if (rc) {
2388                 /* If find_unc succeeded then rc == 0 so we can not end */
2389                 /* up accidently freeing someone elses tcon struct */
2390                 if (tcon)
2391                         cifs_put_tcon(tcon);
2392                 else if (pSesInfo)
2393                         cifs_put_smb_ses(pSesInfo);
2394                 else
2395                         cifs_put_tcp_session(srvTcp);
2396                 goto out;
2397         }
2398         cifs_sb->tcon = tcon;
2399
2400         /* do not care if following two calls succeed - informational */
2401         if (!tcon->ipc) {
2402                 CIFSSMBQFSDeviceInfo(xid, tcon);
2403                 CIFSSMBQFSAttributeInfo(xid, tcon);
2404         }
2405
2406         /* tell server which Unix caps we support */
2407         if (tcon->ses->capabilities & CAP_UNIX)
2408                 /* reset of caps checks mount to see if unix extensions
2409                    disabled for just this mount */
2410                 reset_cifs_unix_caps(xid, tcon, sb, volume_info);
2411         else
2412                 tcon->unix_ext = 0; /* server does not support them */
2413
2414         /* convert forward to back slashes in prepath here if needed */
2415         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2416                 convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb));
2417
2418         if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2419                 cifs_sb->rsize = 1024 * 127;
2420                 cFYI(DBG2, ("no very large read support, rsize now 127K"));
2421         }
2422         if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2423                 cifs_sb->wsize = min(cifs_sb->wsize,
2424                                (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2425         if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2426                 cifs_sb->rsize = min(cifs_sb->rsize,
2427                                (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2428
2429         /* volume_info->password is freed above when existing session found
2430         (in which case it is not needed anymore) but when new sesion is created
2431         the password ptr is put in the new session structure (in which case the
2432         password will be freed at unmount time) */
2433 out:
2434         /* zero out password before freeing */
2435         if (volume_info) {
2436                 if (volume_info->password != NULL) {
2437                         memset(volume_info->password, 0,
2438                                 strlen(volume_info->password));
2439                         kfree(volume_info->password);
2440                 }
2441                 kfree(volume_info->UNC);
2442                 kfree(volume_info->prepath);
2443                 kfree(volume_info);
2444         }
2445         FreeXid(xid);
2446         return rc;
2447 }
2448
2449 static int
2450 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2451               char session_key[CIFS_SESS_KEY_SIZE],
2452               const struct nls_table *nls_codepage)
2453 {
2454         struct smb_hdr *smb_buffer;
2455         struct smb_hdr *smb_buffer_response;
2456         SESSION_SETUP_ANDX *pSMB;
2457         SESSION_SETUP_ANDX *pSMBr;
2458         char *bcc_ptr;
2459         char *user;
2460         char *domain;
2461         int rc = 0;
2462         int remaining_words = 0;
2463         int bytes_returned = 0;
2464         int len;
2465         __u32 capabilities;
2466         __u16 count;
2467
2468         cFYI(1, ("In sesssetup"));
2469         if (ses == NULL)
2470                 return -EINVAL;
2471         user = ses->userName;
2472         domain = ses->domainName;
2473         smb_buffer = cifs_buf_get();
2474
2475         if (smb_buffer == NULL)
2476                 return -ENOMEM;
2477
2478         smb_buffer_response = smb_buffer;
2479         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2480
2481         /* send SMBsessionSetup here */
2482         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2483                         NULL /* no tCon exists yet */ , 13 /* wct */ );
2484
2485         smb_buffer->Mid = GetNextMid(ses->server);
2486         pSMB->req_no_secext.AndXCommand = 0xFF;
2487         pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2488         pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2489
2490         if (ses->server->secMode &
2491                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2492                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2493
2494         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2495                 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2496         if (ses->capabilities & CAP_UNICODE) {
2497                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2498                 capabilities |= CAP_UNICODE;
2499         }
2500         if (ses->capabilities & CAP_STATUS32) {
2501                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2502                 capabilities |= CAP_STATUS32;
2503         }
2504         if (ses->capabilities & CAP_DFS) {
2505                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2506                 capabilities |= CAP_DFS;
2507         }
2508         pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2509
2510         pSMB->req_no_secext.CaseInsensitivePasswordLength =
2511                 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2512
2513         pSMB->req_no_secext.CaseSensitivePasswordLength =
2514             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2515         bcc_ptr = pByteArea(smb_buffer);
2516         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2517         bcc_ptr += CIFS_SESS_KEY_SIZE;
2518         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2519         bcc_ptr += CIFS_SESS_KEY_SIZE;
2520
2521         if (ses->capabilities & CAP_UNICODE) {
2522                 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2523                         *bcc_ptr = 0;
2524                         bcc_ptr++;
2525                 }
2526                 if (user == NULL)
2527                         bytes_returned = 0; /* skip null user */
2528                 else
2529                         bytes_returned =
2530                                 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2531                                         nls_codepage);
2532                 /* convert number of 16 bit words to bytes */
2533                 bcc_ptr += 2 * bytes_returned;
2534                 bcc_ptr += 2;   /* trailing null */
2535                 if (domain == NULL)
2536                         bytes_returned =
2537                             cifs_strtoUCS((__le16 *) bcc_ptr,
2538                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2539                 else
2540                         bytes_returned =
2541                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2542                                           nls_codepage);
2543                 bcc_ptr += 2 * bytes_returned;
2544                 bcc_ptr += 2;
2545                 bytes_returned =
2546                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2547                                   32, nls_codepage);
2548                 bcc_ptr += 2 * bytes_returned;
2549                 bytes_returned =
2550                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release,
2551                                   32, nls_codepage);
2552                 bcc_ptr += 2 * bytes_returned;
2553                 bcc_ptr += 2;
2554                 bytes_returned =
2555                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2556                                   64, nls_codepage);
2557                 bcc_ptr += 2 * bytes_returned;
2558                 bcc_ptr += 2;
2559         } else {
2560                 if (user != NULL) {
2561                     strncpy(bcc_ptr, user, 200);
2562                     bcc_ptr += strnlen(user, 200);
2563                 }
2564                 *bcc_ptr = 0;
2565                 bcc_ptr++;
2566                 if (domain == NULL) {
2567                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2568                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2569                 } else {
2570                         strncpy(bcc_ptr, domain, 64);
2571                         bcc_ptr += strnlen(domain, 64);
2572                         *bcc_ptr = 0;
2573                         bcc_ptr++;
2574                 }
2575                 strcpy(bcc_ptr, "Linux version ");
2576                 bcc_ptr += strlen("Linux version ");
2577                 strcpy(bcc_ptr, utsname()->release);
2578                 bcc_ptr += strlen(utsname()->release) + 1;
2579                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2580                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2581         }
2582         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2583         smb_buffer->smb_buf_length += count;
2584         pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2585
2586         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2587                          &bytes_returned, CIFS_LONG_OP);
2588         if (rc) {
2589 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2590         } else if ((smb_buffer_response->WordCount == 3)
2591                    || (smb_buffer_response->WordCount == 4)) {
2592                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2593                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2594                 if (action & GUEST_LOGIN)
2595                         cFYI(1, ("Guest login")); /* BB mark SesInfo struct? */
2596                 ses->Suid = smb_buffer_response->Uid; /* UID left in wire format
2597                                                          (little endian) */
2598                 cFYI(1, ("UID = %d ", ses->Suid));
2599         /* response can have either 3 or 4 word count - Samba sends 3 */
2600                 bcc_ptr = pByteArea(smb_buffer_response);
2601                 if ((pSMBr->resp.hdr.WordCount == 3)
2602                     || ((pSMBr->resp.hdr.WordCount == 4)
2603                         && (blob_len < pSMBr->resp.ByteCount))) {
2604                         if (pSMBr->resp.hdr.WordCount == 4)
2605                                 bcc_ptr += blob_len;
2606
2607                         if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2608                                 if ((long) (bcc_ptr) % 2) {
2609                                         remaining_words =
2610                                             (BCC(smb_buffer_response) - 1) / 2;
2611                                         /* Unicode strings must be word
2612                                            aligned */
2613                                         bcc_ptr++;
2614                                 } else {
2615                                         remaining_words =
2616                                                 BCC(smb_buffer_response) / 2;
2617                                 }
2618                                 len =
2619                                     UniStrnlen((wchar_t *) bcc_ptr,
2620                                                remaining_words - 1);
2621 /* We look for obvious messed up bcc or strings in response so we do not go off
2622    the end since (at least) WIN2K and Windows XP have a major bug in not null
2623    terminating last Unicode string in response  */
2624                                 if (ses->serverOS)
2625                                         kfree(ses->serverOS);
2626                                 ses->serverOS = kzalloc(2 * (len + 1),
2627                                                         GFP_KERNEL);
2628                                 if (ses->serverOS == NULL)
2629                                         goto sesssetup_nomem;
2630                                 cifs_strfromUCS_le(ses->serverOS,
2631                                                    (__le16 *)bcc_ptr,
2632                                                    len, nls_codepage);
2633                                 bcc_ptr += 2 * (len + 1);
2634                                 remaining_words -= len + 1;
2635                                 ses->serverOS[2 * len] = 0;
2636                                 ses->serverOS[1 + (2 * len)] = 0;
2637                                 if (remaining_words > 0) {
2638                                         len = UniStrnlen((wchar_t *)bcc_ptr,
2639                                                          remaining_words-1);
2640                                         kfree(ses->serverNOS);
2641                                         ses->serverNOS = kzalloc(2 * (len + 1),
2642                                                                  GFP_KERNEL);
2643                                         if (ses->serverNOS == NULL)
2644                                                 goto sesssetup_nomem;
2645                                         cifs_strfromUCS_le(ses->serverNOS,
2646                                                            (__le16 *)bcc_ptr,
2647                                                            len, nls_codepage);
2648                                         bcc_ptr += 2 * (len + 1);
2649                                         ses->serverNOS[2 * len] = 0;
2650                                         ses->serverNOS[1 + (2 * len)] = 0;
2651                                         if (strncmp(ses->serverNOS,
2652                                                 "NT LAN Manager 4", 16) == 0) {
2653                                                 cFYI(1, ("NT4 server"));
2654                                                 ses->flags |= CIFS_SES_NT4;
2655                                         }
2656                                         remaining_words -= len + 1;
2657                                         if (remaining_words > 0) {
2658                                                 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2659                                 /* last string is not always null terminated
2660                                    (for e.g. for Windows XP & 2000) */
2661                                                 if (ses->serverDomain)
2662                                                         kfree(ses->serverDomain);
2663                                                 ses->serverDomain =
2664                                                     kzalloc(2*(len+1),
2665                                                             GFP_KERNEL);
2666                                                 if (ses->serverDomain == NULL)
2667                                                         goto sesssetup_nomem;
2668                                                 cifs_strfromUCS_le(ses->serverDomain,
2669                                                         (__le16 *)bcc_ptr,
2670                                                         len, nls_codepage);
2671                                                 bcc_ptr += 2 * (len + 1);
2672                                                 ses->serverDomain[2*len] = 0;
2673                                                 ses->serverDomain[1+(2*len)] = 0;
2674                                         } else { /* else no more room so create
2675                                                   dummy domain string */
2676                                                 if (ses->serverDomain)
2677                                                         kfree(ses->serverDomain);
2678                                                 ses->serverDomain =
2679                                                         kzalloc(2, GFP_KERNEL);
2680                                         }
2681                                 } else { /* no room so create dummy domain
2682                                             and NOS string */
2683
2684                                         /* if these kcallocs fail not much we
2685                                            can do, but better to not fail the
2686                                            sesssetup itself */
2687                                         kfree(ses->serverDomain);
2688                                         ses->serverDomain =
2689                                             kzalloc(2, GFP_KERNEL);
2690                                         kfree(ses->serverNOS);
2691                                         ses->serverNOS =
2692                                             kzalloc(2, GFP_KERNEL);
2693                                 }
2694                         } else {        /* ASCII */
2695                                 len = strnlen(bcc_ptr, 1024);
2696                                 if (((long) bcc_ptr + len) - (long)
2697                                     pByteArea(smb_buffer_response)
2698                                             <= BCC(smb_buffer_response)) {
2699                                         kfree(ses->serverOS);
2700                                         ses->serverOS = kzalloc(len + 1,
2701                                                                 GFP_KERNEL);
2702                                         if (ses->serverOS == NULL)
2703                                                 goto sesssetup_nomem;
2704                                         strncpy(ses->serverOS, bcc_ptr, len);
2705
2706                                         bcc_ptr += len;
2707                                         /* null terminate the string */
2708                                         bcc_ptr[0] = 0;
2709                                         bcc_ptr++;
2710
2711                                         len = strnlen(bcc_ptr, 1024);
2712                                         kfree(ses->serverNOS);
2713                                         ses->serverNOS = kzalloc(len + 1,
2714                                                                  GFP_KERNEL);
2715                                         if (ses->serverNOS == NULL)
2716                                                 goto sesssetup_nomem;
2717                                         strncpy(ses->serverNOS, bcc_ptr, len);
2718                                         bcc_ptr += len;
2719                                         bcc_ptr[0] = 0;
2720                                         bcc_ptr++;
2721
2722                                         len = strnlen(bcc_ptr, 1024);
2723                                         if (ses->serverDomain)
2724                                                 kfree(ses->serverDomain);
2725                                         ses->serverDomain = kzalloc(len + 1,
2726                                                                     GFP_KERNEL);
2727                                         if (ses->serverDomain == NULL)
2728                                                 goto sesssetup_nomem;
2729                                         strncpy(ses->serverDomain, bcc_ptr,
2730                                                 len);
2731                                         bcc_ptr += len;
2732                                         bcc_ptr[0] = 0;
2733                                         bcc_ptr++;
2734                                 } else
2735                                         cFYI(1,
2736                                              ("Variable field of length %d "
2737                                                 "extends beyond end of smb ",
2738                                               len));
2739                         }
2740                 } else {
2741                         cERROR(1, ("Security Blob Length extends beyond "
2742                                 "end of SMB"));
2743                 }
2744         } else {
2745                 cERROR(1, ("Invalid Word count %d: ",
2746                         smb_buffer_response->WordCount));
2747                 rc = -EIO;
2748         }
2749 sesssetup_nomem:        /* do not return an error on nomem for the info strings,
2750                            since that could make reconnection harder, and
2751                            reconnection might be needed to free memory */
2752         cifs_buf_release(smb_buffer);
2753
2754         return rc;
2755 }
2756
2757 static int
2758 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2759                               struct cifsSesInfo *ses, bool *pNTLMv2_flag,
2760                               const struct nls_table *nls_codepage)
2761 {
2762         struct smb_hdr *smb_buffer;
2763         struct smb_hdr *smb_buffer_response;
2764         SESSION_SETUP_ANDX *pSMB;
2765         SESSION_SETUP_ANDX *pSMBr;
2766         char *bcc_ptr;
2767         char *domain;
2768         int rc = 0;
2769         int remaining_words = 0;
2770         int bytes_returned = 0;
2771         int len;
2772         int SecurityBlobLength = sizeof(NEGOTIATE_MESSAGE);
2773         PNEGOTIATE_MESSAGE SecurityBlob;
2774         PCHALLENGE_MESSAGE SecurityBlob2;
2775         __u32 negotiate_flags, capabilities;
2776         __u16 count;
2777
2778         cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
2779         if (ses == NULL)
2780                 return -EINVAL;
2781         domain = ses->domainName;
2782         *pNTLMv2_flag = false;
2783         smb_buffer = cifs_buf_get();
2784         if (smb_buffer == NULL) {
2785                 return -ENOMEM;
2786         }
2787         smb_buffer_response = smb_buffer;
2788         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2789         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2790
2791         /* send SMBsessionSetup here */
2792         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2793                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2794
2795         smb_buffer->Mid = GetNextMid(ses->server);
2796         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2797         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2798
2799         pSMB->req.AndXCommand = 0xFF;
2800         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2801         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2802
2803         if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2804                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2805
2806         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2807             CAP_EXTENDED_SECURITY;
2808         if (ses->capabilities & CAP_UNICODE) {
2809                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2810                 capabilities |= CAP_UNICODE;
2811         }
2812         if (ses->capabilities & CAP_STATUS32) {
2813                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2814                 capabilities |= CAP_STATUS32;
2815         }
2816         if (ses->capabilities & CAP_DFS) {
2817                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2818                 capabilities |= CAP_DFS;
2819         }
2820         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2821
2822         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2823         SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2824         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2825         SecurityBlob->MessageType = NtLmNegotiate;
2826         negotiate_flags =
2827             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2828             NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
2829             NTLMSSP_NEGOTIATE_56 |
2830             /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2831         if (sign_CIFS_PDUs)
2832                 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2833 /*      if (ntlmv2_support)
2834                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;*/
2835         /* setup pointers to domain name and workstation name */
2836         bcc_ptr += SecurityBlobLength;
2837
2838         SecurityBlob->WorkstationName.Buffer = 0;
2839         SecurityBlob->WorkstationName.Length = 0;
2840         SecurityBlob->WorkstationName.MaximumLength = 0;
2841
2842         /* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
2843         along with username on auth request (ie the response to challenge) */
2844         SecurityBlob->DomainName.Buffer = 0;
2845         SecurityBlob->DomainName.Length = 0;
2846         SecurityBlob->DomainName.MaximumLength = 0;
2847         if (ses->capabilities & CAP_UNICODE) {
2848                 if ((long) bcc_ptr % 2) {
2849                         *bcc_ptr = 0;
2850                         bcc_ptr++;
2851                 }
2852
2853                 bytes_returned =
2854                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2855                                   32, nls_codepage);
2856                 bcc_ptr += 2 * bytes_returned;
2857                 bytes_returned =
2858                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
2859                                   nls_codepage);
2860                 bcc_ptr += 2 * bytes_returned;
2861                 bcc_ptr += 2;   /* null terminate Linux version */
2862                 bytes_returned =
2863                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2864                                   64, nls_codepage);
2865                 bcc_ptr += 2 * bytes_returned;
2866                 *(bcc_ptr + 1) = 0;
2867                 *(bcc_ptr + 2) = 0;
2868                 bcc_ptr += 2;   /* null terminate network opsys string */
2869                 *(bcc_ptr + 1) = 0;
2870                 *(bcc_ptr + 2) = 0;
2871                 bcc_ptr += 2;   /* null domain */
2872         } else {                /* ASCII */
2873                 strcpy(bcc_ptr, "Linux version ");
2874                 bcc_ptr += strlen("Linux version ");
2875                 strcpy(bcc_ptr, utsname()->release);
2876                 bcc_ptr += strlen(utsname()->release) + 1;
2877                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2878                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2879                 bcc_ptr++;      /* empty domain field */
2880                 *bcc_ptr = 0;
2881         }
2882         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2883         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2884         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2885         smb_buffer->smb_buf_length += count;
2886         pSMB->req.ByteCount = cpu_to_le16(count);
2887
2888         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2889                          &bytes_returned, CIFS_LONG_OP);
2890
2891         if (smb_buffer_response->Status.CifsError ==
2892             cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
2893                 rc = 0;
2894
2895         if (rc) {
2896 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2897         } else if ((smb_buffer_response->WordCount == 3)
2898                    || (smb_buffer_response->WordCount == 4)) {
2899                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2900                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2901
2902                 if (action & GUEST_LOGIN)
2903                         cFYI(1, ("Guest login"));
2904         /* Do we want to set anything in SesInfo struct when guest login? */
2905
2906                 bcc_ptr = pByteArea(smb_buffer_response);
2907         /* response can have either 3 or 4 word count - Samba sends 3 */
2908
2909                 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
2910                 if (SecurityBlob2->MessageType != NtLmChallenge) {
2911                         cFYI(1, ("Unexpected NTLMSSP message type received %d",
2912                               SecurityBlob2->MessageType));
2913                 } else if (ses) {
2914                         ses->Suid = smb_buffer_response->Uid; /* UID left in le format */
2915                         cFYI(1, ("UID = %d", ses->Suid));
2916                         if ((pSMBr->resp.hdr.WordCount == 3)
2917                             || ((pSMBr->resp.hdr.WordCount == 4)
2918                                 && (blob_len <
2919                                     pSMBr->resp.ByteCount))) {
2920
2921                                 if (pSMBr->resp.hdr.WordCount == 4) {
2922                                         bcc_ptr += blob_len;
2923                                         cFYI(1, ("Security Blob Length %d",
2924                                               blob_len));
2925                                 }
2926
2927                                 cFYI(1, ("NTLMSSP Challenge rcvd"));
2928
2929                                 memcpy(ses->server->cryptKey,
2930                                        SecurityBlob2->Challenge,
2931                                        CIFS_CRYPTO_KEY_SIZE);
2932                                 if (SecurityBlob2->NegotiateFlags &
2933                                         cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
2934                                         *pNTLMv2_flag = true;
2935
2936                                 if ((SecurityBlob2->NegotiateFlags &
2937                                         cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN))
2938                                         || (sign_CIFS_PDUs > 1))
2939                                                 ses->server->secMode |=
2940                                                         SECMODE_SIGN_REQUIRED;
2941                                 if ((SecurityBlob2->NegotiateFlags &
2942                                         cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
2943                                                 ses->server->secMode |=
2944                                                         SECMODE_SIGN_ENABLED;
2945
2946                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2947                                         if ((long) (bcc_ptr) % 2) {
2948                                                 remaining_words =
2949                                                     (BCC(smb_buffer_response)
2950                                                      - 1) / 2;
2951                                          /* Must word align unicode strings */
2952                                                 bcc_ptr++;
2953                                         } else {
2954                                                 remaining_words =
2955                                                     BCC
2956                                                     (smb_buffer_response) / 2;
2957                                         }
2958                                         len =
2959                                             UniStrnlen((wchar_t *) bcc_ptr,
2960                                                        remaining_words - 1);
2961 /* We look for obvious messed up bcc or strings in response so we do not go off
2962    the end since (at least) WIN2K and Windows XP have a major bug in not null
2963    terminating last Unicode string in response  */
2964                                         if (ses->serverOS)
2965                                                 kfree(ses->serverOS);
2966                                         ses->serverOS =
2967                                             kzalloc(2 * (len + 1), GFP_KERNEL);
2968                                         cifs_strfromUCS_le(ses->serverOS,
2969                                                            (__le16 *)
2970                                                            bcc_ptr, len,
2971                                                            nls_codepage);
2972                                         bcc_ptr += 2 * (len + 1);
2973                                         remaining_words -= len + 1;
2974                                         ses->serverOS[2 * len] = 0;
2975                                         ses->serverOS[1 + (2 * len)] = 0;
2976                                         if (remaining_words > 0) {
2977                                                 len = UniStrnlen((wchar_t *)
2978                                                                  bcc_ptr,
2979                                                                  remaining_words
2980                                                                  - 1);
2981                                                 kfree(ses->serverNOS);
2982                                                 ses->serverNOS =
2983                                                     kzalloc(2 * (len + 1),
2984                                                             GFP_KERNEL);
2985                                                 cifs_strfromUCS_le(ses->
2986                                                                    serverNOS,
2987                                                                    (__le16 *)
2988                                                                    bcc_ptr,
2989                                                                    len,
2990                                                                    nls_codepage);
2991                                                 bcc_ptr += 2 * (len + 1);
2992                                                 ses->serverNOS[2 * len] = 0;
2993                                                 ses->serverNOS[1 +
2994                                                                (2 * len)] = 0;
2995                                                 remaining_words -= len + 1;
2996                                                 if (remaining_words > 0) {
2997                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2998                                 /* last string not always null terminated
2999                                    (for e.g. for Windows XP & 2000) */
3000                                                         kfree(ses->serverDomain);
3001                                                         ses->serverDomain =
3002                                                             kzalloc(2 *
3003                                                                     (len +
3004                                                                      1),
3005                                                                     GFP_KERNEL);
3006                                                         cifs_strfromUCS_le
3007                                                             (ses->serverDomain,
3008                                                              (__le16 *)bcc_ptr,
3009                                                              len, nls_codepage);
3010                                                         bcc_ptr +=
3011                                                             2 * (len + 1);
3012                                                         ses->serverDomain[2*len]
3013                                                             = 0;
3014                                                         ses->serverDomain
3015                                                                 [1 + (2 * len)]
3016                                                             = 0;
3017                                                 } /* else no more room so create dummy domain string */
3018                                                 else {
3019                                                         kfree(ses->serverDomain);
3020                                                         ses->serverDomain =
3021                                                             kzalloc(2,
3022                                                                     GFP_KERNEL);
3023                                                 }
3024                                         } else {        /* no room so create dummy domain and NOS string */
3025                                                 kfree(ses->serverDomain);
3026                                                 ses->serverDomain =
3027                                                     kzalloc(2, GFP_KERNEL);
3028                                                 kfree(ses->serverNOS);
3029                                                 ses->serverNOS =
3030                                                     kzalloc(2, GFP_KERNEL);
3031                                         }
3032                                 } else {        /* ASCII */
3033                                         len = strnlen(bcc_ptr, 1024);
3034                                         if (((long) bcc_ptr + len) - (long)
3035                                             pByteArea(smb_buffer_response)
3036                                             <= BCC(smb_buffer_response)) {
3037                                                 if (ses->serverOS)
3038                                                         kfree(ses->serverOS);
3039                                                 ses->serverOS =
3040                                                     kzalloc(len + 1,
3041                                                             GFP_KERNEL);
3042                                                 strncpy(ses->serverOS,
3043                                                         bcc_ptr, len);
3044
3045                                                 bcc_ptr += len;
3046                                                 bcc_ptr[0] = 0; /* null terminate string */
3047                                                 bcc_ptr++;
3048
3049                                                 len = strnlen(bcc_ptr, 1024);
3050                                                 kfree(ses->serverNOS);
3051                                                 ses->serverNOS =
3052                                                     kzalloc(len + 1,
3053                                                             GFP_KERNEL);
3054                                                 strncpy(ses->serverNOS, bcc_ptr, len);
3055                                                 bcc_ptr += len;
3056                                                 bcc_ptr[0] = 0;
3057                                                 bcc_ptr++;
3058
3059                                                 len = strnlen(bcc_ptr, 1024);
3060                                                 kfree(ses->serverDomain);
3061                                                 ses->serverDomain =
3062                                                     kzalloc(len + 1,
3063                                                             GFP_KERNEL);
3064                                                 strncpy(ses->serverDomain,
3065                                                         bcc_ptr, len);
3066                                                 bcc_ptr += len;
3067                                                 bcc_ptr[0] = 0;
3068                                                 bcc_ptr++;
3069                                         } else
3070                                                 cFYI(1,
3071                                                      ("field of length %d "
3072                                                     "extends beyond end of smb",
3073                                                       len));
3074                                 }
3075                         } else {
3076                                 cERROR(1, ("Security Blob Length extends beyond"
3077                                            " end of SMB"));
3078                         }
3079                 } else {
3080                         cERROR(1, ("No session structure passed in."));
3081                 }
3082         } else {
3083                 cERROR(1, ("Invalid Word count %d:",
3084                         smb_buffer_response->WordCount));
3085                 rc = -EIO;
3086         }
3087
3088         cifs_buf_release(smb_buffer);
3089
3090         return rc;
3091 }
3092 static int
3093 CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
3094                         char *ntlm_session_key, bool ntlmv2_flag,
3095                         const struct nls_table *nls_codepage)
3096 {
3097         struct smb_hdr *smb_buffer;
3098         struct smb_hdr *smb_buffer_response;
3099         SESSION_SETUP_ANDX *pSMB;
3100         SESSION_SETUP_ANDX *pSMBr;
3101         char *bcc_ptr;
3102         char *user;
3103         char *domain;
3104         int rc = 0;
3105         int remaining_words = 0;
3106         int bytes_returned = 0;
3107         int len;
3108         int SecurityBlobLength = sizeof(AUTHENTICATE_MESSAGE);
3109         PAUTHENTICATE_MESSAGE SecurityBlob;
3110         __u32 negotiate_flags, capabilities;
3111         __u16 count;
3112
3113         cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
3114         if (ses == NULL)
3115                 return -EINVAL;
3116         user = ses->userName;
3117         domain = ses->domainName;
3118         smb_buffer = cifs_buf_get();
3119         if (smb_buffer == NULL) {
3120                 return -ENOMEM;
3121         }
3122         smb_buffer_response = smb_buffer;
3123         pSMB = (SESSION_SETUP_ANDX *)smb_buffer;
3124         pSMBr = (SESSION_SETUP_ANDX *)smb_buffer_response;
3125
3126         /* send SMBsessionSetup here */
3127         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
3128                         NULL /* no tCon exists yet */ , 12 /* wct */ );
3129
3130         smb_buffer->Mid = GetNextMid(ses->server);
3131         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
3132         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
3133         pSMB->req.AndXCommand = 0xFF;
3134         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
3135         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
3136
3137         pSMB->req.hdr.Uid = ses->Suid;
3138
3139         if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3140                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3141
3142         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
3143                         CAP_EXTENDED_SECURITY;
3144         if (ses->capabilities & CAP_UNICODE) {
3145                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3146                 capabilities |= CAP_UNICODE;
3147         }
3148         if (ses->capabilities & CAP_STATUS32) {
3149                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3150                 capabilities |= CAP_STATUS32;
3151         }
3152         if (ses->capabilities & CAP_DFS) {
3153                 smb_buffer->Flags2 |= SMBFLG2_DFS;
3154                 capabilities |= CAP_DFS;
3155         }
3156         pSMB->req.Capabilities = cpu_to_le32(capabilities);
3157
3158         bcc_ptr = (char *)&pSMB->req.SecurityBlob;
3159         SecurityBlob = (PAUTHENTICATE_MESSAGE)bcc_ptr;
3160         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
3161         SecurityBlob->MessageType = NtLmAuthenticate;
3162         bcc_ptr += SecurityBlobLength;
3163         negotiate_flags = NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
3164                         NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
3165                         0x80000000 | NTLMSSP_NEGOTIATE_128;
3166         if (sign_CIFS_PDUs)
3167                 negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
3168         if (ntlmv2_flag)
3169                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
3170
3171 /* setup pointers to domain name and workstation name */
3172
3173         SecurityBlob->WorkstationName.Buffer = 0;
3174         SecurityBlob->WorkstationName.Length = 0;
3175         SecurityBlob->WorkstationName.MaximumLength = 0;
3176         SecurityBlob->SessionKey.Length = 0;
3177         SecurityBlob->SessionKey.MaximumLength = 0;
3178         SecurityBlob->SessionKey.Buffer = 0;
3179
3180         SecurityBlob->LmChallengeResponse.Length = 0;
3181         SecurityBlob->LmChallengeResponse.MaximumLength = 0;
3182         SecurityBlob->LmChallengeResponse.Buffer = 0;
3183
3184         SecurityBlob->NtChallengeResponse.Length =
3185             cpu_to_le16(CIFS_SESS_KEY_SIZE);
3186         SecurityBlob->NtChallengeResponse.MaximumLength =
3187             cpu_to_le16(CIFS_SESS_KEY_SIZE);
3188         memcpy(bcc_ptr, ntlm_session_key, CIFS_SESS_KEY_SIZE);
3189         SecurityBlob->NtChallengeResponse.Buffer =
3190             cpu_to_le32(SecurityBlobLength);
3191         SecurityBlobLength += CIFS_SESS_KEY_SIZE;
3192         bcc_ptr += CIFS_SESS_KEY_SIZE;
3193
3194         if (ses->capabilities & CAP_UNICODE) {
3195                 if (domain == NULL) {
3196                         SecurityBlob->DomainName.Buffer = 0;
3197                         SecurityBlob->DomainName.Length = 0;
3198                         SecurityBlob->DomainName.MaximumLength = 0;
3199                 } else {
3200                         __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
3201                                           nls_codepage);
3202                         ln *= 2;
3203                         SecurityBlob->DomainName.MaximumLength =
3204                             cpu_to_le16(ln);
3205                         SecurityBlob->DomainName.Buffer =
3206                             cpu_to_le32(SecurityBlobLength);
3207                         bcc_ptr += ln;
3208                         SecurityBlobLength += ln;
3209                         SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3210                 }
3211                 if (user == NULL) {
3212                         SecurityBlob->UserName.Buffer = 0;
3213                         SecurityBlob->UserName.Length = 0;
3214                         SecurityBlob->UserName.MaximumLength = 0;
3215                 } else {
3216                         __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
3217                                           nls_codepage);
3218                         ln *= 2;
3219                         SecurityBlob->UserName.MaximumLength =
3220                             cpu_to_le16(ln);
3221                         SecurityBlob->UserName.Buffer =
3222                             cpu_to_le32(SecurityBlobLength);
3223                         bcc_ptr += ln;
3224                         SecurityBlobLength += ln;
3225                         SecurityBlob->UserName.Length = cpu_to_le16(ln);
3226                 }
3227
3228                 /* SecurityBlob->WorkstationName.Length =
3229                  cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
3230                    SecurityBlob->WorkstationName.Length *= 2;
3231                    SecurityBlob->WorkstationName.MaximumLength =
3232                         cpu_to_le16(SecurityBlob->WorkstationName.Length);
3233                    SecurityBlob->WorkstationName.Buffer =
3234                                  cpu_to_le32(SecurityBlobLength);
3235                    bcc_ptr += SecurityBlob->WorkstationName.Length;
3236                    SecurityBlobLength += SecurityBlob->WorkstationName.Length;
3237                    SecurityBlob->WorkstationName.Length =
3238                         cpu_to_le16(SecurityBlob->WorkstationName.Length);  */
3239
3240                 if ((long) bcc_ptr % 2) {
3241                         *bcc_ptr = 0;
3242                         bcc_ptr++;
3243                 }
3244                 bytes_returned =
3245                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
3246                                   32, nls_codepage);
3247                 bcc_ptr += 2 * bytes_returned;
3248                 bytes_returned =
3249                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
3250                                   nls_codepage);
3251                 bcc_ptr += 2 * bytes_returned;
3252                 bcc_ptr += 2;   /* null term version string */
3253                 bytes_returned =
3254                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
3255                                   64, nls_codepage);
3256                 bcc_ptr += 2 * bytes_returned;
3257                 *(bcc_ptr + 1) = 0;
3258                 *(bcc_ptr + 2) = 0;
3259                 bcc_ptr += 2;   /* null terminate network opsys string */
3260                 *(bcc_ptr + 1) = 0;
3261                 *(bcc_ptr + 2) = 0;
3262                 bcc_ptr += 2;   /* null domain */
3263         } else {                /* ASCII */
3264                 if (domain == NULL) {
3265                         SecurityBlob->DomainName.Buffer = 0;
3266                         SecurityBlob->DomainName.Length = 0;
3267                         SecurityBlob->DomainName.MaximumLength = 0;
3268                 } else {
3269                         __u16 ln;
3270                         negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
3271                         strncpy(bcc_ptr, domain, 63);
3272                         ln = strnlen(domain, 64);
3273                         SecurityBlob->DomainName.MaximumLength =
3274                             cpu_to_le16(ln);
3275                         SecurityBlob->DomainName.Buffer =
3276                             cpu_to_le32(SecurityBlobLength);
3277                         bcc_ptr += ln;
3278                         SecurityBlobLength += ln;
3279                         SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3280                 }
3281                 if (user == NULL) {
3282                         SecurityBlob->UserName.Buffer = 0;
3283                         SecurityBlob->UserName.Length = 0;
3284                         SecurityBlob->UserName.MaximumLength = 0;
3285                 } else {
3286                         __u16 ln;
3287                         strncpy(bcc_ptr, user, 63);
3288                         ln = strnlen(user, 64);
3289                         SecurityBlob->UserName.MaximumLength = cpu_to_le16(ln);
3290                         SecurityBlob->UserName.Buffer =
3291                                                 cpu_to_le32(SecurityBlobLength);
3292                         bcc_ptr += ln;
3293                         SecurityBlobLength += ln;
3294                         SecurityBlob->UserName.Length = cpu_to_le16(ln);
3295                 }
3296                 /* BB fill in our workstation name if known BB */
3297
3298                 strcpy(bcc_ptr, "Linux version ");
3299                 bcc_ptr += strlen("Linux version ");
3300                 strcpy(bcc_ptr, utsname()->release);
3301                 bcc_ptr += strlen(utsname()->release) + 1;
3302                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
3303                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
3304                 bcc_ptr++;      /* null domain */
3305                 *bcc_ptr = 0;
3306         }
3307         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
3308         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
3309         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
3310         smb_buffer->smb_buf_length += count;
3311         pSMB->req.ByteCount = cpu_to_le16(count);
3312
3313         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
3314                          &bytes_returned, CIFS_LONG_OP);
3315         if (rc) {
3316 /*   rc = map_smb_to_linux_error(smb_buffer_response) done in SendReceive now */
3317         } else if ((smb_buffer_response->WordCount == 3) ||
3318                    (smb_buffer_response->WordCount == 4)) {
3319                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
3320                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
3321                 if (action & GUEST_LOGIN)
3322                         cFYI(1, ("Guest login")); /* BB Should we set anything
3323                                                          in SesInfo struct ? */
3324 /*              if (SecurityBlob2->MessageType != NtLm??) {
3325                         cFYI("Unexpected message type on auth response is %d"));
3326                 } */
3327
3328                 if (ses) {
3329                         cFYI(1,
3330                              ("Check challenge UID %d vs auth response UID %d",
3331                               ses->Suid, smb_buffer_response->Uid));
3332                         /* UID left in wire format */
3333                         ses->Suid = smb_buffer_response->Uid;
3334                         bcc_ptr = pByteArea(smb_buffer_response);
3335                 /* response can have either 3 or 4 word count - Samba sends 3 */
3336                         if ((pSMBr->resp.hdr.WordCount == 3)
3337                             || ((pSMBr->resp.hdr.WordCount == 4)
3338                                 && (blob_len <
3339                                     pSMBr->resp.ByteCount))) {
3340                                 if (pSMBr->resp.hdr.WordCount == 4) {
3341                                         bcc_ptr +=
3342                                             blob_len;
3343                                         cFYI(1,
3344                                              ("Security Blob Length %d ",
3345                                               blob_len));
3346                                 }
3347
3348                                 cFYI(1,
3349                                      ("NTLMSSP response to Authenticate "));
3350
3351                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3352                                         if ((long) (bcc_ptr) % 2) {
3353                                                 remaining_words =
3354                                                     (BCC(smb_buffer_response)
3355                                                      - 1) / 2;
3356                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
3357                                         } else {
3358                                                 remaining_words = BCC(smb_buffer_response) / 2;
3359                                         }
3360                                         len = UniStrnlen((wchar_t *) bcc_ptr,
3361                                                         remaining_words - 1);
3362 /* We look for obvious messed up bcc or strings in response so we do not go off
3363   the end since (at least) WIN2K and Windows XP have a major bug in not null
3364   terminating last Unicode string in response  */
3365                                         if (ses->serverOS)
3366                                                 kfree(ses->serverOS);
3367                                         ses->serverOS =
3368                                             kzalloc(2 * (len + 1), GFP_KERNEL);
3369                                         cifs_strfromUCS_le(ses->serverOS,
3370                                                            (__le16 *)
3371                                                            bcc_ptr, len,
3372                                                            nls_codepage);
3373                                         bcc_ptr += 2 * (len + 1);
3374                                         remaining_words -= len + 1;
3375                                         ses->serverOS[2 * len] = 0;
3376                                         ses->serverOS[1 + (2 * len)] = 0;
3377                                         if (remaining_words > 0) {
3378                                                 len = UniStrnlen((wchar_t *)
3379                                                                  bcc_ptr,
3380                                                                  remaining_words
3381                                                                  - 1);
3382                                                 kfree(ses->serverNOS);
3383                                                 ses->serverNOS =
3384                                                     kzalloc(2 * (len + 1),
3385                                                             GFP_KERNEL);
3386                                                 cifs_strfromUCS_le(ses->
3387                                                                    serverNOS,
3388                                                                    (__le16 *)
3389                                                                    bcc_ptr,
3390                                                                    len,
3391                                                                    nls_codepage);
3392                                                 bcc_ptr += 2 * (len + 1);
3393                                                 ses->serverNOS[2 * len] = 0;
3394                                                 ses->serverNOS[1+(2*len)] = 0;
3395                                                 remaining_words -= len + 1;
3396                                                 if (remaining_words > 0) {
3397                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3398      /* last string not always null terminated (e.g. for Windows XP & 2000) */
3399                                                         if (ses->serverDomain)
3400                                                                 kfree(ses->serverDomain);
3401                                                         ses->serverDomain =
3402                                                             kzalloc(2 *
3403                                                                     (len +
3404                                                                      1),
3405                                                                     GFP_KERNEL);
3406                                                         cifs_strfromUCS_le
3407                                                             (ses->
3408                                                              serverDomain,
3409                                                              (__le16 *)
3410                                                              bcc_ptr, len,
3411                                                              nls_codepage);
3412                                                         bcc_ptr +=
3413                                                             2 * (len + 1);
3414                                                         ses->
3415                                                             serverDomain[2
3416                                                                          * len]
3417                                                             = 0;
3418                                                         ses->
3419                                                             serverDomain[1
3420                                                                          +
3421                                                                          (2
3422                                                                           *
3423                                                                           len)]
3424                                                             = 0;
3425                                                 } /* else no more room so create dummy domain string */
3426                                                 else {
3427                                                         if (ses->serverDomain)
3428                                                                 kfree(ses->serverDomain);
3429                                                         ses->serverDomain = kzalloc(2,GFP_KERNEL);
3430                                                 }
3431                                         } else {  /* no room so create dummy domain and NOS string */
3432                                                 if (ses->serverDomain)
3433                                                         kfree(ses->serverDomain);
3434                                                 ses->serverDomain = kzalloc(2, GFP_KERNEL);
3435                                                 kfree(ses->serverNOS);
3436                                                 ses->serverNOS = kzalloc(2, GFP_KERNEL);
3437                                         }
3438                                 } else {        /* ASCII */
3439                                         len = strnlen(bcc_ptr, 1024);
3440                                         if (((long) bcc_ptr + len) -
3441                                            (long) pByteArea(smb_buffer_response)
3442                                                 <= BCC(smb_buffer_response)) {
3443                                                 if (ses->serverOS)
3444                                                         kfree(ses->serverOS);
3445                                                 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
3446                                                 strncpy(ses->serverOS,bcc_ptr, len);
3447
3448                                                 bcc_ptr += len;
3449                                                 bcc_ptr[0] = 0; /* null terminate the string */
3450                                                 bcc_ptr++;
3451
3452                                                 len = strnlen(bcc_ptr, 1024);
3453                                                 kfree(ses->serverNOS);
3454                                                 ses->serverNOS = kzalloc(len+1,
3455                                                                     GFP_KERNEL);
3456                                                 strncpy(ses->serverNOS,
3457                                                         bcc_ptr, len);
3458                                                 bcc_ptr += len;
3459                                                 bcc_ptr[0] = 0;
3460                                                 bcc_ptr++;
3461
3462                                                 len = strnlen(bcc_ptr, 1024);
3463                                                 if (ses->serverDomain)
3464                                                         kfree(ses->serverDomain);
3465                                                 ses->serverDomain =
3466                                                                 kzalloc(len+1,
3467                                                                     GFP_KERNEL);
3468                                                 strncpy(ses->serverDomain,
3469                                                         bcc_ptr, len);
3470                                                 bcc_ptr += len;
3471                                                 bcc_ptr[0] = 0;
3472                                                 bcc_ptr++;
3473                                         } else
3474                                                 cFYI(1, ("field of length %d "
3475                                                    "extends beyond end of smb ",
3476                                                       len));
3477                                 }
3478                         } else {
3479                                 cERROR(1, ("Security Blob extends beyond end "
3480                                         "of SMB"));
3481                         }
3482                 } else {
3483                         cERROR(1, ("No session structure passed in."));
3484                 }
3485         } else {
3486                 cERROR(1, ("Invalid Word count %d: ",
3487                         smb_buffer_response->WordCount));
3488                 rc = -EIO;
3489         }
3490
3491         cifs_buf_release(smb_buffer);
3492
3493         return rc;
3494 }
3495
3496 int
3497 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
3498          const char *tree, struct cifsTconInfo *tcon,
3499          const struct nls_table *nls_codepage)
3500 {
3501         struct smb_hdr *smb_buffer;
3502         struct smb_hdr *smb_buffer_response;
3503         TCONX_REQ *pSMB;
3504         TCONX_RSP *pSMBr;
3505         unsigned char *bcc_ptr;
3506         int rc = 0;
3507         int length;
3508         __u16 count;
3509
3510         if (ses == NULL)
3511                 return -EIO;
3512
3513         smb_buffer = cifs_buf_get();
3514         if (smb_buffer == NULL) {
3515                 return -ENOMEM;
3516         }
3517         smb_buffer_response = smb_buffer;
3518
3519         header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3520                         NULL /*no tid */ , 4 /*wct */ );
3521
3522         smb_buffer->Mid = GetNextMid(ses->server);
3523         smb_buffer->Uid = ses->Suid;
3524         pSMB = (TCONX_REQ *) smb_buffer;
3525         pSMBr = (TCONX_RSP *) smb_buffer_response;
3526
3527         pSMB->AndXCommand = 0xFF;
3528         pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3529         bcc_ptr = &pSMB->Password[0];
3530         if ((ses->server->secMode) & SECMODE_USER) {
3531                 pSMB->PasswordLength = cpu_to_le16(1);  /* minimum */
3532                 *bcc_ptr = 0; /* password is null byte */
3533                 bcc_ptr++;              /* skip password */
3534                 /* already aligned so no need to do it below */
3535         } else {
3536                 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
3537                 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3538                    specified as required (when that support is added to
3539                    the vfs in the future) as only NTLM or the much
3540                    weaker LANMAN (which we do not send by default) is accepted
3541                    by Samba (not sure whether other servers allow
3542                    NTLMv2 password here) */
3543 #ifdef CONFIG_CIFS_WEAK_PW_HASH
3544                 if ((extended_security & CIFSSEC_MAY_LANMAN) &&
3545                     (ses->server->secType == LANMAN))
3546                         calc_lanman_hash(tcon->password, ses->server->cryptKey,
3547                                          ses->server->secMode &
3548                                             SECMODE_PW_ENCRYPT ? true : false,
3549                                          bcc_ptr);
3550                 else
3551 #endif /* CIFS_WEAK_PW_HASH */
3552                 SMBNTencrypt(tcon->password, ses->server->cryptKey,
3553                              bcc_ptr);
3554
3555                 bcc_ptr += CIFS_SESS_KEY_SIZE;
3556                 if (ses->capabilities & CAP_UNICODE) {
3557                         /* must align unicode strings */
3558                         *bcc_ptr = 0; /* null byte password */
3559                         bcc_ptr++;
3560                 }
3561         }
3562
3563         if (ses->server->secMode &
3564                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3565                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3566
3567         if (ses->capabilities & CAP_STATUS32) {
3568                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3569         }
3570         if (ses->capabilities & CAP_DFS) {
3571                 smb_buffer->Flags2 |= SMBFLG2_DFS;
3572         }
3573         if (ses->capabilities & CAP_UNICODE) {
3574                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3575                 length =
3576                     cifs_strtoUCS((__le16 *) bcc_ptr, tree,
3577                         6 /* max utf8 char length in bytes */ *
3578                         (/* server len*/ + 256 /* share len */), nls_codepage);
3579                 bcc_ptr += 2 * length;  /* convert num 16 bit words to bytes */
3580                 bcc_ptr += 2;   /* skip trailing null */
3581         } else {                /* ASCII */
3582                 strcpy(bcc_ptr, tree);
3583                 bcc_ptr += strlen(tree) + 1;
3584         }
3585         strcpy(bcc_ptr, "?????");
3586         bcc_ptr += strlen("?????");
3587         bcc_ptr += 1;
3588         count = bcc_ptr - &pSMB->Password[0];
3589         pSMB->hdr.smb_buf_length += count;
3590         pSMB->ByteCount = cpu_to_le16(count);
3591
3592         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
3593                          CIFS_STD_OP);
3594
3595         /* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
3596         /* above now done in SendReceive */
3597         if ((rc == 0) && (tcon != NULL)) {
3598                 tcon->tidStatus = CifsGood;
3599                 tcon->need_reconnect = false;
3600                 tcon->tid = smb_buffer_response->Tid;
3601                 bcc_ptr = pByteArea(smb_buffer_response);
3602                 length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
3603                 /* skip service field (NB: this field is always ASCII) */
3604                 if (length == 3) {
3605                         if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3606                             (bcc_ptr[2] == 'C')) {
3607                                 cFYI(1, ("IPC connection"));
3608                                 tcon->ipc = 1;
3609                         }
3610                 } else if (length == 2) {
3611                         if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3612                                 /* the most common case */
3613                                 cFYI(1, ("disk share connection"));
3614                         }
3615                 }
3616                 bcc_ptr += length + 1;
3617                 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3618                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3619                         length = UniStrnlen((wchar_t *) bcc_ptr, 512);
3620                         if ((bcc_ptr + (2 * length)) -
3621                              pByteArea(smb_buffer_response) <=
3622                             BCC(smb_buffer_response)) {
3623                                 kfree(tcon->nativeFileSystem);
3624                                 tcon->nativeFileSystem =
3625                                     kzalloc(length + 2, GFP_KERNEL);
3626                                 if (tcon->nativeFileSystem)
3627                                         cifs_strfromUCS_le(
3628                                                 tcon->nativeFileSystem,
3629                                                 (__le16 *) bcc_ptr,
3630                                                 length, nls_codepage);
3631                                 bcc_ptr += 2 * length;
3632                                 bcc_ptr[0] = 0; /* null terminate the string */
3633                                 bcc_ptr[1] = 0;
3634                                 bcc_ptr += 2;
3635                         }
3636                         /* else do not bother copying these information fields*/
3637                 } else {
3638                         length = strnlen(bcc_ptr, 1024);
3639                         if ((bcc_ptr + length) -
3640                             pByteArea(smb_buffer_response) <=
3641                             BCC(smb_buffer_response)) {
3642                                 kfree(tcon->nativeFileSystem);
3643                                 tcon->nativeFileSystem =
3644                                     kzalloc(length + 1, GFP_KERNEL);
3645                                 if (tcon->nativeFileSystem)
3646                                         strncpy(tcon->nativeFileSystem, bcc_ptr,
3647                                                 length);
3648                         }
3649                         /* else do not bother copying these information fields*/
3650                 }
3651                 if ((smb_buffer_response->WordCount == 3) ||
3652                          (smb_buffer_response->WordCount == 7))
3653                         /* field is in same location */
3654                         tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3655                 else
3656                         tcon->Flags = 0;
3657                 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
3658         } else if ((rc == 0) && tcon == NULL) {
3659                 /* all we need to save for IPC$ connection */
3660                 ses->ipc_tid = smb_buffer_response->Tid;
3661         }
3662
3663         cifs_buf_release(smb_buffer);
3664         return rc;
3665 }
3666
3667 int
3668 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3669 {
3670         int rc = 0;
3671         char *tmp;
3672
3673         if (cifs_sb->tcon)
3674                 cifs_put_tcon(cifs_sb->tcon);
3675
3676         cifs_sb->tcon = NULL;
3677         tmp = cifs_sb->prepath;
3678         cifs_sb->prepathlen = 0;
3679         cifs_sb->prepath = NULL;
3680         kfree(tmp);
3681
3682         return rc;
3683 }
3684
3685 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3686                                            struct nls_table *nls_info)
3687 {
3688         int rc = 0;
3689         char ntlm_session_key[CIFS_SESS_KEY_SIZE];
3690         bool ntlmv2_flag = false;
3691         int first_time = 0;
3692         struct TCP_Server_Info *server = pSesInfo->server;
3693
3694         /* what if server changes its buffer size after dropping the session? */
3695         if (server->maxBuf == 0) /* no need to send on reconnect */ {
3696                 rc = CIFSSMBNegotiate(xid, pSesInfo);
3697                 if (rc == -EAGAIN) {
3698                         /* retry only once on 1st time connection */
3699                         rc = CIFSSMBNegotiate(xid, pSesInfo);
3700                         if (rc == -EAGAIN)
3701                                 rc = -EHOSTDOWN;
3702                 }
3703                 if (rc == 0) {
3704                         spin_lock(&GlobalMid_Lock);
3705                         if (server->tcpStatus != CifsExiting)
3706                                 server->tcpStatus = CifsGood;
3707                         else
3708                                 rc = -EHOSTDOWN;
3709                         spin_unlock(&GlobalMid_Lock);
3710
3711                 }
3712                 first_time = 1;
3713         }
3714
3715         if (rc)
3716                 goto ss_err_exit;
3717
3718         pSesInfo->flags = 0;
3719         pSesInfo->capabilities = server->capabilities;
3720         if (linuxExtEnabled == 0)
3721                 pSesInfo->capabilities &= (~CAP_UNIX);
3722         /*      pSesInfo->sequence_number = 0;*/
3723         cFYI(1, ("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3724                  server->secMode, server->capabilities, server->timeAdj));
3725
3726         if (experimEnabled < 2)
3727                 rc = CIFS_SessSetup(xid, pSesInfo, first_time, nls_info);
3728         else if (extended_security
3729                         && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3730                         && (server->secType == NTLMSSP)) {
3731                 rc = -EOPNOTSUPP;
3732         } else if (extended_security
3733                         && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3734                         && (server->secType == RawNTLMSSP)) {
3735                 cFYI(1, ("NTLMSSP sesssetup"));
3736                 rc = CIFSNTLMSSPNegotiateSessSetup(xid, pSesInfo, &ntlmv2_flag,
3737                                                    nls_info);
3738                 if (!rc) {
3739                         if (ntlmv2_flag) {
3740                                 char *v2_response;
3741                                 cFYI(1, ("more secure NTLM ver2 hash"));
3742                                 if (CalcNTLMv2_partial_mac_key(pSesInfo,
3743                                                                 nls_info)) {
3744                                         rc = -ENOMEM;
3745                                         goto ss_err_exit;
3746                                 } else
3747                                         v2_response = kmalloc(16 + 64 /* blob*/,
3748                                                                 GFP_KERNEL);
3749                                 if (v2_response) {
3750                                         CalcNTLMv2_response(pSesInfo,
3751                                                                 v2_response);
3752                                 /*      if (first_time)
3753                                                 cifs_calculate_ntlmv2_mac_key */
3754                                         kfree(v2_response);
3755                                         /* BB Put dummy sig in SessSetup PDU? */
3756                                 } else {
3757                                         rc = -ENOMEM;
3758                                         goto ss_err_exit;
3759                                 }
3760
3761                         } else {
3762                                 SMBNTencrypt(pSesInfo->password,
3763                                              server->cryptKey,
3764                                              ntlm_session_key);
3765
3766                                 if (first_time)
3767                                         cifs_calculate_mac_key(
3768                                              &server->mac_signing_key,
3769                                              ntlm_session_key,
3770                                              pSesInfo->password);
3771                         }
3772                         /* for better security the weaker lanman hash not sent
3773                            in AuthSessSetup so we no longer calculate it */
3774
3775                         rc = CIFSNTLMSSPAuthSessSetup(xid, pSesInfo,
3776                                                       ntlm_session_key,
3777                                                       ntlmv2_flag,
3778                                                       nls_info);
3779                 }
3780         } else { /* old style NTLM 0.12 session setup */
3781                 SMBNTencrypt(pSesInfo->password, server->cryptKey,
3782                              ntlm_session_key);
3783
3784                 if (first_time)
3785                         cifs_calculate_mac_key(&server->mac_signing_key,
3786                                                 ntlm_session_key,
3787                                                 pSesInfo->password);
3788
3789                 rc = CIFSSessSetup(xid, pSesInfo, ntlm_session_key, nls_info);
3790         }
3791         if (rc) {
3792                 cERROR(1, ("Send error in SessSetup = %d", rc));
3793         } else {
3794                 cFYI(1, ("CIFS Session Established successfully"));
3795                         spin_lock(&GlobalMid_Lock);
3796                         pSesInfo->status = CifsGood;
3797                         pSesInfo->need_reconnect = false;
3798                         spin_unlock(&GlobalMid_Lock);
3799         }
3800
3801 ss_err_exit:
3802         return rc;
3803 }
3804