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