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   1 /*
   2  *   fs/cifs/connect.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2008
   5  *   Author(s): Steve French (sfrench@us.ibm.com)
   6  *
   7  *   This library is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU Lesser General Public License as published
   9  *   by the Free Software Foundation; either version 2.1 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This library is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  15  *   the GNU Lesser General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU Lesser General Public License
  18  *   along with this library; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21 #include <linux/fs.h>
  22 #include <linux/net.h>
  23 #include <linux/string.h>
  24 #include <linux/list.h>
  25 #include <linux/wait.h>
  26 #include <linux/ipv6.h>
  27 #include <linux/pagemap.h>
  28 #include <linux/ctype.h>
  29 #include <linux/utsname.h>
  30 #include <linux/mempool.h>
  31 #include <linux/delay.h>
  32 #include <linux/completion.h>
  33 #include <linux/kthread.h>
  34 #include <linux/pagevec.h>
  35 #include <linux/freezer.h>
  36 #include <asm/uaccess.h>
  37 #include <asm/processor.h>
  38 #include "cifspdu.h"
  39 #include "cifsglob.h"
  40 #include "cifsproto.h"
  41 #include "cifs_unicode.h"
  42 #include "cifs_debug.h"
  43 #include "cifs_fs_sb.h"
  44 #include "ntlmssp.h"
  45 #include "nterr.h"
  46 #include "rfc1002pdu.h"
  47 #include "cn_cifs.h"
  48
  49 #define CIFS_PORT 445
  50 #define RFC1001_PORT 139
  51
  52 extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
  53                          unsigned char *p24);
  54
  55 extern mempool_t *cifs_req_poolp;
  56
  57 struct smb_vol {
  58         char *username;
  59         char *password;
  60         char *domainname;
  61         char *UNC;
  62         char *UNCip;
  63         char *in6_addr;   /* ipv6 address as human readable form of in6_addr */
  64         char *iocharset;  /* local code page for mapping to and from Unicode */
  65         char source_rfc1001_name[16]; /* netbios name of client */
  66         char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
  67         uid_t linux_uid;
  68         gid_t linux_gid;
  69         mode_t file_mode;
  70         mode_t dir_mode;
  71         unsigned secFlg;
  72         bool rw:1;
  73         bool retry:1;
  74         bool intr:1;
  75         bool setuids:1;
  76         bool override_uid:1;
  77         bool override_gid:1;
  78         bool dynperm:1;
  79         bool noperm:1;
  80         bool no_psx_acl:1; /* set if posix acl support should be disabled */
  81         bool cifs_acl:1;
  82         bool no_xattr:1;   /* set if xattr (EA) support should be disabled*/
  83         bool server_ino:1; /* use inode numbers from server ie UniqueId */
  84         bool direct_io:1;
  85         bool remap:1;      /* set to remap seven reserved chars in filenames */
  86         bool posix_paths:1; /* unset to not ask for posix pathnames. */
  87         bool no_linux_ext:1;
  88         bool sfu_emul:1;
  89         bool nullauth:1;   /* attempt to authenticate with null user */
  90         bool nocase:1;     /* request case insensitive filenames */
  91         bool nobrl:1;      /* disable sending byte range locks to srv */
  92         bool mand_lock:1;  /* send mandatory not posix byte range lock reqs */
  93         bool seal:1;       /* request transport encryption on share */
  94         bool nodfs:1;      /* Do not request DFS, even if available */
  95         bool local_lease:1; /* check leases only on local system, not remote */
  96         bool noblocksnd:1;
  97         bool noautotune:1;
  98         unsigned int rsize;
  99         unsigned int wsize;
 100         unsigned int sockopt;
 101         unsigned short int port;
 102         char *prepath;
 103 };
 104
 105 static int ipv4_connect(struct TCP_Server_Info *server);
 106 static int ipv6_connect(struct TCP_Server_Info *server);
 107
 108 /*
 109  * cifs tcp session reconnection
 110  *
 111  * mark tcp session as reconnecting so temporarily locked
 112  * mark all smb sessions as reconnecting for tcp session
 113  * reconnect tcp session
 114  * wake up waiters on reconnection? - (not needed currently)
 115  */
 116 static int
 117 cifs_reconnect(struct TCP_Server_Info *server)
 118 {
 119         int rc = 0;
 120         struct list_head *tmp, *tmp2;
 121         struct cifsSesInfo *ses;
 122         struct cifsTconInfo *tcon;
 123         struct mid_q_entry *mid_entry;
 124
 125         spin_lock(&GlobalMid_Lock);
 126         if (server->tcpStatus == CifsExiting) {
 127                 /* the demux thread will exit normally
 128                 next time through the loop */
 129                 spin_unlock(&GlobalMid_Lock);
 130                 return rc;
 131         } else
 132                 server->tcpStatus = CifsNeedReconnect;
 133         spin_unlock(&GlobalMid_Lock);
 134         server->maxBuf = 0;
 135
 136         cFYI(1, ("Reconnecting tcp session"));
 137
 138         /* before reconnecting the tcp session, mark the smb session (uid)
 139                 and the tid bad so they are not used until reconnected */
 140         read_lock(&cifs_tcp_ses_lock);
 141         list_for_each(tmp, &server->smb_ses_list) {
 142                 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
 143                 ses->need_reconnect = true;
 144                 ses->ipc_tid = 0;
 145                 list_for_each(tmp2, &ses->tcon_list) {
 146                         tcon = list_entry(tmp2, struct cifsTconInfo, tcon_list);
 147                         tcon->need_reconnect = true;
 148                 }
 149         }
 150         read_unlock(&cifs_tcp_ses_lock);
 151         /* do not want to be sending data on a socket we are freeing */
 152         mutex_lock(&server->srv_mutex);
 153         if (server->ssocket) {
 154                 cFYI(1, ("State: 0x%x Flags: 0x%lx", server->ssocket->state,
 155                         server->ssocket->flags));
 156                 kernel_sock_shutdown(server->ssocket, SHUT_WR);
 157                 cFYI(1, ("Post shutdown state: 0x%x Flags: 0x%lx",
 158                         server->ssocket->state,
 159                         server->ssocket->flags));
 160                 sock_release(server->ssocket);
 161                 server->ssocket = NULL;
 162         }
 163
 164         spin_lock(&GlobalMid_Lock);
 165         list_for_each(tmp, &server->pending_mid_q) {
 166                 mid_entry = list_entry(tmp, struct
 167                                         mid_q_entry,
 168                                         qhead);
 169                 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
 170                                 /* Mark other intransit requests as needing
 171                                    retry so we do not immediately mark the
 172                                    session bad again (ie after we reconnect
 173                                    below) as they timeout too */
 174                         mid_entry->midState = MID_RETRY_NEEDED;
 175                 }
 176         }
 177         spin_unlock(&GlobalMid_Lock);
 178         mutex_unlock(&server->srv_mutex);
 179
 180         while ((server->tcpStatus != CifsExiting) &&
 181                (server->tcpStatus != CifsGood)) {
 182                 try_to_freeze();
 183                 if (server->addr.sockAddr6.sin6_family == AF_INET6)
 184                         rc = ipv6_connect(server);
 185                 else
 186                         rc = ipv4_connect(server);
 187                 if (rc) {
 188                         cFYI(1, ("reconnect error %d", rc));
 189                         msleep(3000);
 190                 } else {
 191                         atomic_inc(&tcpSesReconnectCount);
 192                         spin_lock(&GlobalMid_Lock);
 193                         if (server->tcpStatus != CifsExiting)
 194                                 server->tcpStatus = CifsGood;
 195                         server->sequence_number = 0;
 196                         spin_unlock(&GlobalMid_Lock);
 197         /*              atomic_set(&server->inFlight,0);*/
 198                         wake_up(&server->response_q);
 199                 }
 200         }
 201         return rc;
 202 }
 203
 204 /*
 205         return codes:
 206                 0       not a transact2, or all data present
 207                 >0      transact2 with that much data missing
 208                 -EINVAL = invalid transact2
 209
 210  */
 211 static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
 212 {
 213         struct smb_t2_rsp *pSMBt;
 214         int total_data_size;
 215         int data_in_this_rsp;
 216         int remaining;
 217
 218         if (pSMB->Command != SMB_COM_TRANSACTION2)
 219                 return 0;
 220
 221         /* check for plausible wct, bcc and t2 data and parm sizes */
 222         /* check for parm and data offset going beyond end of smb */
 223         if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
 224                 cFYI(1, ("invalid transact2 word count"));
 225                 return -EINVAL;
 226         }
 227
 228         pSMBt = (struct smb_t2_rsp *)pSMB;
 229
 230         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 231         data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 232
 233         remaining = total_data_size - data_in_this_rsp;
 234
 235         if (remaining == 0)
 236                 return 0;
 237         else if (remaining < 0) {
 238                 cFYI(1, ("total data %d smaller than data in frame %d",
 239                         total_data_size, data_in_this_rsp));
 240                 return -EINVAL;
 241         } else {
 242                 cFYI(1, ("missing %d bytes from transact2, check next response",
 243                         remaining));
 244                 if (total_data_size > maxBufSize) {
 245                         cERROR(1, ("TotalDataSize %d is over maximum buffer %d",
 246                                 total_data_size, maxBufSize));
 247                         return -EINVAL;
 248                 }
 249                 return remaining;
 250         }
 251 }
 252
 253 static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
 254 {
 255         struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
 256         struct smb_t2_rsp *pSMBt  = (struct smb_t2_rsp *)pTargetSMB;
 257         int total_data_size;
 258         int total_in_buf;
 259         int remaining;
 260         int total_in_buf2;
 261         char *data_area_of_target;
 262         char *data_area_of_buf2;
 263         __u16 byte_count;
 264
 265         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 266
 267         if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
 268                 cFYI(1, ("total data size of primary and secondary t2 differ"));
 269         }
 270
 271         total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 272
 273         remaining = total_data_size - total_in_buf;
 274
 275         if (remaining < 0)
 276                 return -EINVAL;
 277
 278         if (remaining == 0) /* nothing to do, ignore */
 279                 return 0;
 280
 281         total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
 282         if (remaining < total_in_buf2) {
 283                 cFYI(1, ("transact2 2nd response contains too much data"));
 284         }
 285
 286         /* find end of first SMB data area */
 287         data_area_of_target = (char *)&pSMBt->hdr.Protocol +
 288                                 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
 289         /* validate target area */
 290
 291         data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
 292                                         le16_to_cpu(pSMB2->t2_rsp.DataOffset);
 293
 294         data_area_of_target += total_in_buf;
 295
 296         /* copy second buffer into end of first buffer */
 297         memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2);
 298         total_in_buf += total_in_buf2;
 299         pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
 300         byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
 301         byte_count += total_in_buf2;
 302         BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
 303
 304         byte_count = pTargetSMB->smb_buf_length;
 305         byte_count += total_in_buf2;
 306
 307         /* BB also add check that we are not beyond maximum buffer size */
 308
 309         pTargetSMB->smb_buf_length = byte_count;
 310
 311         if (remaining == total_in_buf2) {
 312                 cFYI(1, ("found the last secondary response"));
 313                 return 0; /* we are done */
 314         } else /* more responses to go */
 315                 return 1;
 316
 317 }
 318
 319 static int
 320 cifs_demultiplex_thread(struct TCP_Server_Info *server)
 321 {
 322         int length;
 323         unsigned int pdu_length, total_read;
 324         struct smb_hdr *smb_buffer = NULL;
 325         struct smb_hdr *bigbuf = NULL;
 326         struct smb_hdr *smallbuf = NULL;
 327         struct msghdr smb_msg;
 328         struct kvec iov;
 329         struct socket *csocket = server->ssocket;
 330         struct list_head *tmp;
 331         struct cifsSesInfo *ses;
 332         struct task_struct *task_to_wake = NULL;
 333         struct mid_q_entry *mid_entry;
 334         char temp;
 335         bool isLargeBuf = false;
 336         bool isMultiRsp;
 337         int reconnect;
 338
 339         current->flags |= PF_MEMALLOC;
 340         cFYI(1, ("Demultiplex PID: %d", task_pid_nr(current)));
 341
 342         length = atomic_inc_return(&tcpSesAllocCount);
 343         if (length > 1)
 344                 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
 345                                 GFP_KERNEL);
 346
 347         set_freezable();
 348         while (server->tcpStatus != CifsExiting) {
 349                 if (try_to_freeze())
 350                         continue;
 351                 if (bigbuf == NULL) {
 352                         bigbuf = cifs_buf_get();
 353                         if (!bigbuf) {
 354                                 cERROR(1, ("No memory for large SMB response"));
 355                                 msleep(3000);
 356                                 /* retry will check if exiting */
 357                                 continue;
 358                         }
 359                 } else if (isLargeBuf) {
 360                         /* we are reusing a dirty large buf, clear its start */
 361                         memset(bigbuf, 0, sizeof(struct smb_hdr));
 362                 }
 363
 364                 if (smallbuf == NULL) {
 365                         smallbuf = cifs_small_buf_get();
 366                         if (!smallbuf) {
 367                                 cERROR(1, ("No memory for SMB response"));
 368                                 msleep(1000);
 369                                 /* retry will check if exiting */
 370                                 continue;
 371                         }
 372                         /* beginning of smb buffer is cleared in our buf_get */
 373                 } else /* if existing small buf clear beginning */
 374                         memset(smallbuf, 0, sizeof(struct smb_hdr));
 375
 376                 isLargeBuf = false;
 377                 isMultiRsp = false;
 378                 smb_buffer = smallbuf;
 379                 iov.iov_base = smb_buffer;
 380                 iov.iov_len = 4;
 381                 smb_msg.msg_control = NULL;
 382                 smb_msg.msg_controllen = 0;
 383                 pdu_length = 4; /* enough to get RFC1001 header */
 384 incomplete_rcv:
 385                 length =
 386                     kernel_recvmsg(csocket, &smb_msg,
 387                                 &iov, 1, pdu_length, 0 /* BB other flags? */);
 388
 389                 if (server->tcpStatus == CifsExiting) {
 390                         break;
 391                 } else if (server->tcpStatus == CifsNeedReconnect) {
 392                         cFYI(1, ("Reconnect after server stopped responding"));
 393                         cifs_reconnect(server);
 394                         cFYI(1, ("call to reconnect done"));
 395                         csocket = server->ssocket;
 396                         continue;
 397                 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
 398                         msleep(1); /* minimum sleep to prevent looping
 399                                 allowing socket to clear and app threads to set
 400                                 tcpStatus CifsNeedReconnect if server hung */
 401                         if (pdu_length < 4) {
 402                                 iov.iov_base = (4 - pdu_length) +
 403                                                         (char *)smb_buffer;
 404                                 iov.iov_len = pdu_length;
 405                                 smb_msg.msg_control = NULL;
 406                                 smb_msg.msg_controllen = 0;
 407                                 goto incomplete_rcv;
 408                         } else
 409                                 continue;
 410                 } else if (length <= 0) {
 411                         if (server->tcpStatus == CifsNew) {
 412                                 cFYI(1, ("tcp session abend after SMBnegprot"));
 413                                 /* some servers kill the TCP session rather than
 414                                    returning an SMB negprot error, in which
 415                                    case reconnecting here is not going to help,
 416                                    and so simply return error to mount */
 417                                 break;
 418                         }
 419                         if (!try_to_freeze() && (length == -EINTR)) {
 420                                 cFYI(1, ("cifsd thread killed"));
 421                                 break;
 422                         }
 423                         cFYI(1, ("Reconnect after unexpected peek error %d",
 424                                 length));
 425                         cifs_reconnect(server);
 426                         csocket = server->ssocket;
 427                         wake_up(&server->response_q);
 428                         continue;
 429                 } else if (length < pdu_length) {
 430                         cFYI(1, ("requested %d bytes but only got %d bytes",
 431                                   pdu_length, length));
 432                         pdu_length -= length;
 433                         msleep(1);
 434                         goto incomplete_rcv;
 435                 }
 436
 437                 /* The right amount was read from socket - 4 bytes */
 438                 /* so we can now interpret the length field */
 439
 440                 /* the first byte big endian of the length field,
 441                 is actually not part of the length but the type
 442                 with the most common, zero, as regular data */
 443                 temp = *((char *) smb_buffer);
 444
 445                 /* Note that FC 1001 length is big endian on the wire,
 446                 but we convert it here so it is always manipulated
 447                 as host byte order */
 448                 pdu_length = be32_to_cpu((__force __be32)smb_buffer->smb_buf_length);
 449                 smb_buffer->smb_buf_length = pdu_length;
 450
 451                 cFYI(1, ("rfc1002 length 0x%x", pdu_length+4));
 452
 453                 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
 454                         continue;
 455                 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
 456                         cFYI(1, ("Good RFC 1002 session rsp"));
 457                         continue;
 458                 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
 459                         /* we get this from Windows 98 instead of
 460                            an error on SMB negprot response */
 461                         cFYI(1, ("Negative RFC1002 Session Response Error 0x%x)",
 462                                 pdu_length));
 463                         if (server->tcpStatus == CifsNew) {
 464                                 /* if nack on negprot (rather than
 465                                 ret of smb negprot error) reconnecting
 466                                 not going to help, ret error to mount */
 467                                 break;
 468                         } else {
 469                                 /* give server a second to
 470                                 clean up before reconnect attempt */
 471                                 msleep(1000);
 472                                 /* always try 445 first on reconnect
 473                                 since we get NACK on some if we ever
 474                                 connected to port 139 (the NACK is
 475                                 since we do not begin with RFC1001
 476                                 session initialize frame) */
 477                                 server->addr.sockAddr.sin_port =
 478                                         htons(CIFS_PORT);
 479                                 cifs_reconnect(server);
 480                                 csocket = server->ssocket;
 481                                 wake_up(&server->response_q);
 482                                 continue;
 483                         }
 484                 } else if (temp != (char) 0) {
 485                         cERROR(1, ("Unknown RFC 1002 frame"));
 486                         cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
 487                                       length);
 488                         cifs_reconnect(server);
 489                         csocket = server->ssocket;
 490                         continue;
 491                 }
 492
 493                 /* else we have an SMB response */
 494                 if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
 495                             (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) {
 496                         cERROR(1, ("Invalid size SMB length %d pdu_length %d",
 497                                         length, pdu_length+4));
 498                         cifs_reconnect(server);
 499                         csocket = server->ssocket;
 500                         wake_up(&server->response_q);
 501                         continue;
 502                 }
 503
 504                 /* else length ok */
 505                 reconnect = 0;
 506
 507                 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
 508                         isLargeBuf = true;
 509                         memcpy(bigbuf, smallbuf, 4);
 510                         smb_buffer = bigbuf;
 511                 }
 512                 length = 0;
 513                 iov.iov_base = 4 + (char *)smb_buffer;
 514                 iov.iov_len = pdu_length;
 515                 for (total_read = 0; total_read < pdu_length;
 516                      total_read += length) {
 517                         length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
 518                                                 pdu_length - total_read, 0);
 519                         if ((server->tcpStatus == CifsExiting) ||
 520                             (length == -EINTR)) {
 521                                 /* then will exit */
 522                                 reconnect = 2;
 523                                 break;
 524                         } else if (server->tcpStatus == CifsNeedReconnect) {
 525                                 cifs_reconnect(server);
 526                                 csocket = server->ssocket;
 527                                 /* Reconnect wakes up rspns q */
 528                                 /* Now we will reread sock */
 529                                 reconnect = 1;
 530                                 break;
 531                         } else if ((length == -ERESTARTSYS) ||
 532                                    (length == -EAGAIN)) {
 533                                 msleep(1); /* minimum sleep to prevent looping,
 534                                               allowing socket to clear and app
 535                                               threads to set tcpStatus
 536                                               CifsNeedReconnect if server hung*/
 537                                 length = 0;
 538                                 continue;
 539                         } else if (length <= 0) {
 540                                 cERROR(1, ("Received no data, expecting %d",
 541                                               pdu_length - total_read));
 542                                 cifs_reconnect(server);
 543                                 csocket = server->ssocket;
 544                                 reconnect = 1;
 545                                 break;
 546                         }
 547                 }
 548                 if (reconnect == 2)
 549                         break;
 550                 else if (reconnect == 1)
 551                         continue;
 552
 553                 length += 4; /* account for rfc1002 hdr */
 554
 555
 556                 dump_smb(smb_buffer, length);
 557                 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
 558                         cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
 559                         continue;
 560                 }
 561
 562
 563                 task_to_wake = NULL;
 564                 spin_lock(&GlobalMid_Lock);
 565                 list_for_each(tmp, &server->pending_mid_q) {
 566                         mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 567
 568                         if ((mid_entry->mid == smb_buffer->Mid) &&
 569                             (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
 570                             (mid_entry->command == smb_buffer->Command)) {
 571                                 if (check2ndT2(smb_buffer,server->maxBuf) > 0) {
 572                                         /* We have a multipart transact2 resp */
 573                                         isMultiRsp = true;
 574                                         if (mid_entry->resp_buf) {
 575                                                 /* merge response - fix up 1st*/
 576                                                 if (coalesce_t2(smb_buffer,
 577                                                         mid_entry->resp_buf)) {
 578                                                         mid_entry->multiRsp =
 579                                                                  true;
 580                                                         break;
 581                                                 } else {
 582                                                         /* all parts received */
 583                                                         mid_entry->multiEnd =
 584                                                                  true;
 585                                                         goto multi_t2_fnd;
 586                                                 }
 587                                         } else {
 588                                                 if (!isLargeBuf) {
 589                                                         cERROR(1,("1st trans2 resp needs bigbuf"));
 590                                         /* BB maybe we can fix this up,  switch
 591                                            to already allocated large buffer? */
 592                                                 } else {
 593                                                         /* Have first buffer */
 594                                                         mid_entry->resp_buf =
 595                                                                  smb_buffer;
 596                                                         mid_entry->largeBuf =
 597                                                                  true;
 598                                                         bigbuf = NULL;
 599                                                 }
 600                                         }
 601                                         break;
 602                                 }
 603                                 mid_entry->resp_buf = smb_buffer;
 604                                 mid_entry->largeBuf = isLargeBuf;
 605 multi_t2_fnd:
 606                                 task_to_wake = mid_entry->tsk;
 607                                 mid_entry->midState = MID_RESPONSE_RECEIVED;
 608 #ifdef CONFIG_CIFS_STATS2
 609                                 mid_entry->when_received = jiffies;
 610 #endif
 611                                 /* so we do not time out requests to  server
 612                                 which is still responding (since server could
 613                                 be busy but not dead) */
 614                                 server->lstrp = jiffies;
 615                                 break;
 616                         }
 617                 }
 618                 spin_unlock(&GlobalMid_Lock);
 619                 if (task_to_wake) {
 620                         /* Was previous buf put in mpx struct for multi-rsp? */
 621                         if (!isMultiRsp) {
 622                                 /* smb buffer will be freed by user thread */
 623                                 if (isLargeBuf)
 624                                         bigbuf = NULL;
 625                                 else
 626                                         smallbuf = NULL;
 627                         }
 628                         wake_up_process(task_to_wake);
 629                 } else if (!is_valid_oplock_break(smb_buffer, server) &&
 630                            !isMultiRsp) {
 631                         cERROR(1, ("No task to wake, unknown frame received! "
 632                                    "NumMids %d", midCount.counter));
 633                         cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
 634                                       sizeof(struct smb_hdr));
 635 #ifdef CONFIG_CIFS_DEBUG2
 636                         cifs_dump_detail(smb_buffer);
 637                         cifs_dump_mids(server);
 638 #endif /* CIFS_DEBUG2 */
 639
 640                 }
 641         } /* end while !EXITING */
 642
 643         /* take it off the list, if it's not already */
 644         write_lock(&cifs_tcp_ses_lock);
 645         list_del_init(&server->tcp_ses_list);
 646         write_unlock(&cifs_tcp_ses_lock);
 647
 648         spin_lock(&GlobalMid_Lock);
 649         server->tcpStatus = CifsExiting;
 650         spin_unlock(&GlobalMid_Lock);
 651         wake_up_all(&server->response_q);
 652
 653         /* check if we have blocked requests that need to free */
 654         /* Note that cifs_max_pending is normally 50, but
 655         can be set at module install time to as little as two */
 656         spin_lock(&GlobalMid_Lock);
 657         if (atomic_read(&server->inFlight) >= cifs_max_pending)
 658                 atomic_set(&server->inFlight, cifs_max_pending - 1);
 659         /* We do not want to set the max_pending too low or we
 660         could end up with the counter going negative */
 661         spin_unlock(&GlobalMid_Lock);
 662         /* Although there should not be any requests blocked on
 663         this queue it can not hurt to be paranoid and try to wake up requests
 664         that may haven been blocked when more than 50 at time were on the wire
 665         to the same server - they now will see the session is in exit state
 666         and get out of SendReceive.  */
 667         wake_up_all(&server->request_q);
 668         /* give those requests time to exit */
 669         msleep(125);
 670
 671         if (server->ssocket) {
 672                 sock_release(csocket);
 673                 server->ssocket = NULL;
 674         }
 675         /* buffer usuallly freed in free_mid - need to free it here on exit */
 676         cifs_buf_release(bigbuf);
 677         if (smallbuf) /* no sense logging a debug message if NULL */
 678                 cifs_small_buf_release(smallbuf);
 679
 680         /*
 681          * BB: we shouldn't have to do any of this. It shouldn't be
 682          * possible to exit from the thread with active SMB sessions
 683          */
 684         read_lock(&cifs_tcp_ses_lock);
 685         if (list_empty(&server->pending_mid_q)) {
 686                 /* loop through server session structures attached to this and
 687                     mark them dead */
 688                 list_for_each(tmp, &server->smb_ses_list) {
 689                         ses = list_entry(tmp, struct cifsSesInfo,
 690                                          smb_ses_list);
 691                         ses->status = CifsExiting;
 692                         ses->server = NULL;
 693                 }
 694                 read_unlock(&cifs_tcp_ses_lock);
 695         } else {
 696                 /* although we can not zero the server struct pointer yet,
 697                 since there are active requests which may depnd on them,
 698                 mark the corresponding SMB sessions as exiting too */
 699                 list_for_each(tmp, &server->smb_ses_list) {
 700                         ses = list_entry(tmp, struct cifsSesInfo,
 701                                          smb_ses_list);
 702                         ses->status = CifsExiting;
 703                 }
 704
 705                 spin_lock(&GlobalMid_Lock);
 706                 list_for_each(tmp, &server->pending_mid_q) {
 707                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 708                         if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
 709                                 cFYI(1, ("Clearing Mid 0x%x - waking up ",
 710                                          mid_entry->mid));
 711                                 task_to_wake = mid_entry->tsk;
 712                                 if (task_to_wake)
 713                                         wake_up_process(task_to_wake);
 714                         }
 715                 }
 716                 spin_unlock(&GlobalMid_Lock);
 717                 read_unlock(&cifs_tcp_ses_lock);
 718                 /* 1/8th of sec is more than enough time for them to exit */
 719                 msleep(125);
 720         }
 721
 722         if (!list_empty(&server->pending_mid_q)) {
 723                 /* mpx threads have not exited yet give them
 724                 at least the smb send timeout time for long ops */
 725                 /* due to delays on oplock break requests, we need
 726                 to wait at least 45 seconds before giving up
 727                 on a request getting a response and going ahead
 728                 and killing cifsd */
 729                 cFYI(1, ("Wait for exit from demultiplex thread"));
 730                 msleep(46000);
 731                 /* if threads still have not exited they are probably never
 732                 coming home not much else we can do but free the memory */
 733         }
 734
 735         /* last chance to mark ses pointers invalid
 736         if there are any pointing to this (e.g
 737         if a crazy root user tried to kill cifsd
 738         kernel thread explicitly this might happen) */
 739         /* BB: This shouldn't be necessary, see above */
 740         read_lock(&cifs_tcp_ses_lock);
 741         list_for_each(tmp, &server->smb_ses_list) {
 742                 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
 743                 ses->server = NULL;
 744         }
 745         read_unlock(&cifs_tcp_ses_lock);
 746
 747         kfree(server->hostname);
 748         task_to_wake = xchg(&server->tsk, NULL);
 749         kfree(server);
 750
 751         length = atomic_dec_return(&tcpSesAllocCount);
 752         if (length  > 0)
 753                 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
 754                                 GFP_KERNEL);
 755
 756         /* if server->tsk was NULL then wait for a signal before exiting */
 757         if (!task_to_wake) {
 758                 set_current_state(TASK_INTERRUPTIBLE);
 759                 while (!signal_pending(current)) {
 760                         schedule();
 761                         set_current_state(TASK_INTERRUPTIBLE);
 762                 }
 763                 set_current_state(TASK_RUNNING);
 764         }
 765
 766         module_put_and_exit(0);
 767 }
 768
 769 /* extract the host portion of the UNC string */
 770 static char *
 771 extract_hostname(const char *unc)
 772 {
 773         const char *src;
 774         char *dst, *delim;
 775         unsigned int len;
 776
 777         /* skip double chars at beginning of string */
 778         /* BB: check validity of these bytes? */
 779         src = unc + 2;
 780
 781         /* delimiter between hostname and sharename is always '\\' now */
 782         delim = strchr(src, '\\');
 783         if (!delim)
 784                 return ERR_PTR(-EINVAL);
 785
 786         len = delim - src;
 787         dst = kmalloc((len + 1), GFP_KERNEL);
 788         if (dst == NULL)
 789                 return ERR_PTR(-ENOMEM);
 790
 791         memcpy(dst, src, len);
 792         dst[len] = '\0';
 793
 794         return dst;
 795 }
 796
 797 static int
 798 cifs_parse_mount_options(char *options, const char *devname,
 799                          struct smb_vol *vol)
 800 {
 801         char *value;
 802         char *data;
 803         unsigned int  temp_len, i, j;
 804         char separator[2];
 805
 806         separator[0] = ',';
 807         separator[1] = 0;
 808
 809         if (Local_System_Name[0] != 0)
 810                 memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
 811         else {
 812                 char *nodename = utsname()->nodename;
 813                 int n = strnlen(nodename, 15);
 814                 memset(vol->source_rfc1001_name, 0x20, 15);
 815                 for (i = 0; i < n; i++) {
 816                         /* does not have to be perfect mapping since field is
 817                         informational, only used for servers that do not support
 818                         port 445 and it can be overridden at mount time */
 819                         vol->source_rfc1001_name[i] = toupper(nodename[i]);
 820                 }
 821         }
 822         vol->source_rfc1001_name[15] = 0;
 823         /* null target name indicates to use *SMBSERVR default called name
 824            if we end up sending RFC1001 session initialize */
 825         vol->target_rfc1001_name[0] = 0;
 826         vol->linux_uid = current->uid;  /* current->euid instead? */
 827         vol->linux_gid = current->gid;
 828         vol->dir_mode = S_IRWXUGO;
 829         /* 2767 perms indicate mandatory locking support */
 830         vol->file_mode = (S_IRWXUGO | S_ISGID) & (~S_IXGRP);
 831
 832         /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
 833         vol->rw = true;
 834         /* default is always to request posix paths. */
 835         vol->posix_paths = 1;
 836
 837         if (!options)
 838                 return 1;
 839
 840         if (strncmp(options, "sep=", 4) == 0) {
 841                 if (options[4] != 0) {
 842                         separator[0] = options[4];
 843                         options += 5;
 844                 } else {
 845                         cFYI(1, ("Null separator not allowed"));
 846                 }
 847         }
 848
 849         while ((data = strsep(&options, separator)) != NULL) {
 850                 if (!*data)
 851                         continue;
 852                 if ((value = strchr(data, '=')) != NULL)
 853                         *value++ = '\0';
 854
 855                 /* Have to parse this before we parse for "user" */
 856                 if (strnicmp(data, "user_xattr", 10) == 0) {
 857                         vol->no_xattr = 0;
 858                 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
 859                         vol->no_xattr = 1;
 860                 } else if (strnicmp(data, "user", 4) == 0) {
 861                         if (!value) {
 862                                 printk(KERN_WARNING
 863                                        "CIFS: invalid or missing username\n");
 864                                 return 1;       /* needs_arg; */
 865                         } else if (!*value) {
 866                                 /* null user, ie anonymous, authentication */
 867                                 vol->nullauth = 1;
 868                         }
 869                         if (strnlen(value, 200) < 200) {
 870                                 vol->username = value;
 871                         } else {
 872                                 printk(KERN_WARNING "CIFS: username too long\n");
 873                                 return 1;
 874                         }
 875                 } else if (strnicmp(data, "pass", 4) == 0) {
 876                         if (!value) {
 877                                 vol->password = NULL;
 878                                 continue;
 879                         } else if (value[0] == 0) {
 880                                 /* check if string begins with double comma
 881                                    since that would mean the password really
 882                                    does start with a comma, and would not
 883                                    indicate an empty string */
 884                                 if (value[1] != separator[0]) {
 885                                         vol->password = NULL;
 886                                         continue;
 887                                 }
 888                         }
 889                         temp_len = strlen(value);
 890                         /* removed password length check, NTLM passwords
 891                                 can be arbitrarily long */
 892
 893                         /* if comma in password, the string will be
 894                         prematurely null terminated.  Commas in password are
 895                         specified across the cifs mount interface by a double
 896                         comma ie ,, and a comma used as in other cases ie ','
 897                         as a parameter delimiter/separator is single and due
 898                         to the strsep above is temporarily zeroed. */
 899
 900                         /* NB: password legally can have multiple commas and
 901                         the only illegal character in a password is null */
 902
 903                         if ((value[temp_len] == 0) &&
 904                             (value[temp_len+1] == separator[0])) {
 905                                 /* reinsert comma */
 906                                 value[temp_len] = separator[0];
 907                                 temp_len += 2;  /* move after second comma */
 908                                 while (value[temp_len] != 0)  {
 909                                         if (value[temp_len] == separator[0]) {
 910                                                 if (value[temp_len+1] ==
 911                                                      separator[0]) {
 912                                                 /* skip second comma */
 913                                                         temp_len++;
 914                                                 } else {
 915                                                 /* single comma indicating start
 916                                                          of next parm */
 917                                                         break;
 918                                                 }
 919                                         }
 920                                         temp_len++;
 921                                 }
 922                                 if (value[temp_len] == 0) {
 923                                         options = NULL;
 924                                 } else {
 925                                         value[temp_len] = 0;
 926                                         /* point option to start of next parm */
 927                                         options = value + temp_len + 1;
 928                                 }
 929                                 /* go from value to value + temp_len condensing
 930                                 double commas to singles. Note that this ends up
 931                                 allocating a few bytes too many, which is ok */
 932                                 vol->password = kzalloc(temp_len, GFP_KERNEL);
 933                                 if (vol->password == NULL) {
 934                                         printk(KERN_WARNING "CIFS: no memory "
 935                                                             "for password\n");
 936                                         return 1;
 937                                 }
 938                                 for (i = 0, j = 0; i < temp_len; i++, j++) {
 939                                         vol->password[j] = value[i];
 940                                         if (value[i] == separator[0]
 941                                                 && value[i+1] == separator[0]) {
 942                                                 /* skip second comma */
 943                                                 i++;
 944                                         }
 945                                 }
 946                                 vol->password[j] = 0;
 947                         } else {
 948                                 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
 949                                 if (vol->password == NULL) {
 950                                         printk(KERN_WARNING "CIFS: no memory "
 951                                                             "for password\n");
 952                                         return 1;
 953                                 }
 954                                 strcpy(vol->password, value);
 955                         }
 956                 } else if (strnicmp(data, "ip", 2) == 0) {
 957                         if (!value || !*value) {
 958                                 vol->UNCip = NULL;
 959                         } else if (strnlen(value, 35) < 35) {
 960                                 vol->UNCip = value;
 961                         } else {
 962                                 printk(KERN_WARNING "CIFS: ip address "
 963                                                     "too long\n");
 964                                 return 1;
 965                         }
 966                 } else if (strnicmp(data, "sec", 3) == 0) {
 967                         if (!value || !*value) {
 968                                 cERROR(1, ("no security value specified"));
 969                                 continue;
 970                         } else if (strnicmp(value, "krb5i", 5) == 0) {
 971                                 vol->secFlg |= CIFSSEC_MAY_KRB5 |
 972                                         CIFSSEC_MUST_SIGN;
 973                         } else if (strnicmp(value, "krb5p", 5) == 0) {
 974                                 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
 975                                         CIFSSEC_MAY_KRB5; */
 976                                 cERROR(1, ("Krb5 cifs privacy not supported"));
 977                                 return 1;
 978                         } else if (strnicmp(value, "krb5", 4) == 0) {
 979                                 vol->secFlg |= CIFSSEC_MAY_KRB5;
 980                         } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
 981                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
 982                                         CIFSSEC_MUST_SIGN;
 983                         } else if (strnicmp(value, "ntlmv2", 6) == 0) {
 984                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
 985                         } else if (strnicmp(value, "ntlmi", 5) == 0) {
 986                                 vol->secFlg |= CIFSSEC_MAY_NTLM |
 987                                         CIFSSEC_MUST_SIGN;
 988                         } else if (strnicmp(value, "ntlm", 4) == 0) {
 989                                 /* ntlm is default so can be turned off too */
 990                                 vol->secFlg |= CIFSSEC_MAY_NTLM;
 991                         } else if (strnicmp(value, "nontlm", 6) == 0) {
 992                                 /* BB is there a better way to do this? */
 993                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
 994 #ifdef CONFIG_CIFS_WEAK_PW_HASH
 995                         } else if (strnicmp(value, "lanman", 6) == 0) {
 996                                 vol->secFlg |= CIFSSEC_MAY_LANMAN;
 997 #endif
 998                         } else if (strnicmp(value, "none", 4) == 0) {
 999                                 vol->nullauth = 1;
1000                         } else {
1001                                 cERROR(1, ("bad security option: %s", value));
1002                                 return 1;
1003                         }
1004                 } else if ((strnicmp(data, "unc", 3) == 0)
1005                            || (strnicmp(data, "target", 6) == 0)
1006                            || (strnicmp(data, "path", 4) == 0)) {
1007                         if (!value || !*value) {
1008                                 printk(KERN_WARNING "CIFS: invalid path to "
1009                                                     "network resource\n");
1010                                 return 1;       /* needs_arg; */
1011                         }
1012                         if ((temp_len = strnlen(value, 300)) < 300) {
1013                                 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1014                                 if (vol->UNC == NULL)
1015                                         return 1;
1016                                 strcpy(vol->UNC, value);
1017                                 if (strncmp(vol->UNC, "//", 2) == 0) {
1018                                         vol->UNC[0] = '\\';
1019                                         vol->UNC[1] = '\\';
1020                                 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1021                                         printk(KERN_WARNING
1022                                                "CIFS: UNC Path does not begin "
1023                                                "with // or \\\\ \n");
1024                                         return 1;
1025                                 }
1026                         } else {
1027                                 printk(KERN_WARNING "CIFS: UNC name too long\n");
1028                                 return 1;
1029                         }
1030                 } else if ((strnicmp(data, "domain", 3) == 0)
1031                            || (strnicmp(data, "workgroup", 5) == 0)) {
1032                         if (!value || !*value) {
1033                                 printk(KERN_WARNING "CIFS: invalid domain name\n");
1034                                 return 1;       /* needs_arg; */
1035                         }
1036                         /* BB are there cases in which a comma can be valid in
1037                         a domain name and need special handling? */
1038                         if (strnlen(value, 256) < 256) {
1039                                 vol->domainname = value;
1040                                 cFYI(1, ("Domain name set"));
1041                         } else {
1042                                 printk(KERN_WARNING "CIFS: domain name too "
1043                                                     "long\n");
1044                                 return 1;
1045                         }
1046                 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1047                         if (!value || !*value) {
1048                                 printk(KERN_WARNING
1049                                         "CIFS: invalid path prefix\n");
1050                                 return 1;       /* needs_argument */
1051                         }
1052                         if ((temp_len = strnlen(value, 1024)) < 1024) {
1053                                 if (value[0] != '/')
1054                                         temp_len++;  /* missing leading slash */
1055                                 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1056                                 if (vol->prepath == NULL)
1057                                         return 1;
1058                                 if (value[0] != '/') {
1059                                         vol->prepath[0] = '/';
1060                                         strcpy(vol->prepath+1, value);
1061                                 } else
1062                                         strcpy(vol->prepath, value);
1063                                 cFYI(1, ("prefix path %s", vol->prepath));
1064                         } else {
1065                                 printk(KERN_WARNING "CIFS: prefix too long\n");
1066                                 return 1;
1067                         }
1068                 } else if (strnicmp(data, "iocharset", 9) == 0) {
1069                         if (!value || !*value) {
1070                                 printk(KERN_WARNING "CIFS: invalid iocharset "
1071                                                     "specified\n");
1072                                 return 1;       /* needs_arg; */
1073                         }
1074                         if (strnlen(value, 65) < 65) {
1075                                 if (strnicmp(value, "default", 7))
1076                                         vol->iocharset = value;
1077                                 /* if iocharset not set then load_nls_default
1078                                    is used by caller */
1079                                 cFYI(1, ("iocharset set to %s", value));
1080                         } else {
1081                                 printk(KERN_WARNING "CIFS: iocharset name "
1082                                                     "too long.\n");
1083                                 return 1;
1084                         }
1085                 } else if (strnicmp(data, "uid", 3) == 0) {
1086                         if (value && *value) {
1087                                 vol->linux_uid =
1088                                         simple_strtoul(value, &value, 0);
1089                                 vol->override_uid = 1;
1090                         }
1091                 } else if (strnicmp(data, "gid", 3) == 0) {
1092                         if (value && *value) {
1093                                 vol->linux_gid =
1094                                         simple_strtoul(value, &value, 0);
1095                                 vol->override_gid = 1;
1096                         }
1097                 } else if (strnicmp(data, "file_mode", 4) == 0) {
1098                         if (value && *value) {
1099                                 vol->file_mode =
1100                                         simple_strtoul(value, &value, 0);
1101                         }
1102                 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1103                         if (value && *value) {
1104                                 vol->dir_mode =
1105                                         simple_strtoul(value, &value, 0);
1106                         }
1107                 } else if (strnicmp(data, "dirmode", 4) == 0) {
1108                         if (value && *value) {
1109                                 vol->dir_mode =
1110                                         simple_strtoul(value, &value, 0);
1111                         }
1112                 } else if (strnicmp(data, "port", 4) == 0) {
1113                         if (value && *value) {
1114                                 vol->port =
1115                                         simple_strtoul(value, &value, 0);
1116                         }
1117                 } else if (strnicmp(data, "rsize", 5) == 0) {
1118                         if (value && *value) {
1119                                 vol->rsize =
1120                                         simple_strtoul(value, &value, 0);
1121                         }
1122                 } else if (strnicmp(data, "wsize", 5) == 0) {
1123                         if (value && *value) {
1124                                 vol->wsize =
1125                                         simple_strtoul(value, &value, 0);
1126                         }
1127                 } else if (strnicmp(data, "sockopt", 5) == 0) {
1128                         if (value && *value) {
1129                                 vol->sockopt =
1130                                         simple_strtoul(value, &value, 0);
1131                         }
1132                 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1133                         if (!value || !*value || (*value == ' ')) {
1134                                 cFYI(1, ("invalid (empty) netbiosname"));
1135                         } else {
1136                                 memset(vol->source_rfc1001_name, 0x20, 15);
1137                                 for (i = 0; i < 15; i++) {
1138                                 /* BB are there cases in which a comma can be
1139                                 valid in this workstation netbios name (and need
1140                                 special handling)? */
1141
1142                                 /* We do not uppercase netbiosname for user */
1143                                         if (value[i] == 0)
1144                                                 break;
1145                                         else
1146                                                 vol->source_rfc1001_name[i] =
1147                                                                 value[i];
1148                                 }
1149                                 /* The string has 16th byte zero still from
1150                                 set at top of the function  */
1151                                 if ((i == 15) && (value[i] != 0))
1152                                         printk(KERN_WARNING "CIFS: netbiosname"
1153                                                 " longer than 15 truncated.\n");
1154                         }
1155                 } else if (strnicmp(data, "servern", 7) == 0) {
1156                         /* servernetbiosname specified override *SMBSERVER */
1157                         if (!value || !*value || (*value == ' ')) {
1158                                 cFYI(1, ("empty server netbiosname specified"));
1159                         } else {
1160                                 /* last byte, type, is 0x20 for servr type */
1161                                 memset(vol->target_rfc1001_name, 0x20, 16);
1162
1163                                 for (i = 0; i < 15; i++) {
1164                                 /* BB are there cases in which a comma can be
1165                                    valid in this workstation netbios name
1166                                    (and need special handling)? */
1167
1168                                 /* user or mount helper must uppercase
1169                                    the netbiosname */
1170                                         if (value[i] == 0)
1171                                                 break;
1172                                         else
1173                                                 vol->target_rfc1001_name[i] =
1174                                                                 value[i];
1175                                 }
1176                                 /* The string has 16th byte zero still from
1177                                    set at top of the function  */
1178                                 if ((i == 15) && (value[i] != 0))
1179                                         printk(KERN_WARNING "CIFS: server net"
1180                                         "biosname longer than 15 truncated.\n");
1181                         }
1182                 } else if (strnicmp(data, "credentials", 4) == 0) {
1183                         /* ignore */
1184                 } else if (strnicmp(data, "version", 3) == 0) {
1185                         /* ignore */
1186                 } else if (strnicmp(data, "guest", 5) == 0) {
1187                         /* ignore */
1188                 } else if (strnicmp(data, "rw", 2) == 0) {
1189                         vol->rw = true;
1190                 } else if (strnicmp(data, "noblocksend", 11) == 0) {
1191                         vol->noblocksnd = 1;
1192                 } else if (strnicmp(data, "noautotune", 10) == 0) {
1193                         vol->noautotune = 1;
1194                 } else if ((strnicmp(data, "suid", 4) == 0) ||
1195                                    (strnicmp(data, "nosuid", 6) == 0) ||
1196                                    (strnicmp(data, "exec", 4) == 0) ||
1197                                    (strnicmp(data, "noexec", 6) == 0) ||
1198                                    (strnicmp(data, "nodev", 5) == 0) ||
1199                                    (strnicmp(data, "noauto", 6) == 0) ||
1200                                    (strnicmp(data, "dev", 3) == 0)) {
1201                         /*  The mount tool or mount.cifs helper (if present)
1202                             uses these opts to set flags, and the flags are read
1203                             by the kernel vfs layer before we get here (ie
1204                             before read super) so there is no point trying to
1205                             parse these options again and set anything and it
1206                             is ok to just ignore them */
1207                         continue;
1208                 } else if (strnicmp(data, "ro", 2) == 0) {
1209                         vol->rw = false;
1210                 } else if (strnicmp(data, "hard", 4) == 0) {
1211                         vol->retry = 1;
1212                 } else if (strnicmp(data, "soft", 4) == 0) {
1213                         vol->retry = 0;
1214                 } else if (strnicmp(data, "perm", 4) == 0) {
1215                         vol->noperm = 0;
1216                 } else if (strnicmp(data, "noperm", 6) == 0) {
1217                         vol->noperm = 1;
1218                 } else if (strnicmp(data, "mapchars", 8) == 0) {
1219                         vol->remap = 1;
1220                 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1221                         vol->remap = 0;
1222                 } else if (strnicmp(data, "sfu", 3) == 0) {
1223                         vol->sfu_emul = 1;
1224                 } else if (strnicmp(data, "nosfu", 5) == 0) {
1225                         vol->sfu_emul = 0;
1226                 } else if (strnicmp(data, "nodfs", 5) == 0) {
1227                         vol->nodfs = 1;
1228                 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1229                         vol->posix_paths = 1;
1230                 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1231                         vol->posix_paths = 0;
1232                 } else if (strnicmp(data, "nounix", 6) == 0) {
1233                         vol->no_linux_ext = 1;
1234                 } else if (strnicmp(data, "nolinux", 7) == 0) {
1235                         vol->no_linux_ext = 1;
1236                 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1237                            (strnicmp(data, "ignorecase", 10)  == 0)) {
1238                         vol->nocase = 1;
1239                 } else if (strnicmp(data, "brl", 3) == 0) {
1240                         vol->nobrl =  0;
1241                 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1242                            (strnicmp(data, "nolock", 6) == 0)) {
1243                         vol->nobrl =  1;
1244                         /* turn off mandatory locking in mode
1245                         if remote locking is turned off since the
1246                         local vfs will do advisory */
1247                         if (vol->file_mode ==
1248                                 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1249                                 vol->file_mode = S_IALLUGO;
1250                 } else if (strnicmp(data, "forcemandatorylock", 9) == 0) {
1251                         /* will take the shorter form "forcemand" as well */
1252                         /* This mount option will force use of mandatory
1253                           (DOS/Windows style) byte range locks, instead of
1254                           using posix advisory byte range locks, even if the
1255                           Unix extensions are available and posix locks would
1256                           be supported otherwise. If Unix extensions are not
1257                           negotiated this has no effect since mandatory locks
1258                           would be used (mandatory locks is all that those
1259                           those servers support) */
1260                         vol->mand_lock = 1;
1261                 } else if (strnicmp(data, "setuids", 7) == 0) {
1262                         vol->setuids = 1;
1263                 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1264                         vol->setuids = 0;
1265                 } else if (strnicmp(data, "dynperm", 7) == 0) {
1266                         vol->dynperm = true;
1267                 } else if (strnicmp(data, "nodynperm", 9) == 0) {
1268                         vol->dynperm = false;
1269                 } else if (strnicmp(data, "nohard", 6) == 0) {
1270                         vol->retry = 0;
1271                 } else if (strnicmp(data, "nosoft", 6) == 0) {
1272                         vol->retry = 1;
1273                 } else if (strnicmp(data, "nointr", 6) == 0) {
1274                         vol->intr = 0;
1275                 } else if (strnicmp(data, "intr", 4) == 0) {
1276                         vol->intr = 1;
1277                 } else if (strnicmp(data, "serverino", 7) == 0) {
1278                         vol->server_ino = 1;
1279                 } else if (strnicmp(data, "noserverino", 9) == 0) {
1280                         vol->server_ino = 0;
1281                 } else if (strnicmp(data, "cifsacl", 7) == 0) {
1282                         vol->cifs_acl = 1;
1283                 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1284                         vol->cifs_acl = 0;
1285                 } else if (strnicmp(data, "acl", 3) == 0) {
1286                         vol->no_psx_acl = 0;
1287                 } else if (strnicmp(data, "noacl", 5) == 0) {
1288                         vol->no_psx_acl = 1;
1289 #ifdef CONFIG_CIFS_EXPERIMENTAL
1290                 } else if (strnicmp(data, "locallease", 6) == 0) {
1291                         vol->local_lease = 1;
1292 #endif
1293                 } else if (strnicmp(data, "sign", 4) == 0) {
1294                         vol->secFlg |= CIFSSEC_MUST_SIGN;
1295                 } else if (strnicmp(data, "seal", 4) == 0) {
1296                         /* we do not do the following in secFlags because seal
1297                            is a per tree connection (mount) not a per socket
1298                            or per-smb connection option in the protocol */
1299                         /* vol->secFlg |= CIFSSEC_MUST_SEAL; */
1300                         vol->seal = 1;
1301                 } else if (strnicmp(data, "direct", 6) == 0) {
1302                         vol->direct_io = 1;
1303                 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
1304                         vol->direct_io = 1;
1305                 } else if (strnicmp(data, "in6_addr", 8) == 0) {
1306                         if (!value || !*value) {
1307                                 vol->in6_addr = NULL;
1308                         } else if (strnlen(value, 49) == 48) {
1309                                 vol->in6_addr = value;
1310                         } else {
1311                                 printk(KERN_WARNING "CIFS: ip v6 address not "
1312                                                     "48 characters long\n");
1313                                 return 1;
1314                         }
1315                 } else if (strnicmp(data, "noac", 4) == 0) {
1316                         printk(KERN_WARNING "CIFS: Mount option noac not "
1317                                 "supported. Instead set "
1318                                 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1319                 } else
1320                         printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1321                                                 data);
1322         }
1323         if (vol->UNC == NULL) {
1324                 if (devname == NULL) {
1325                         printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1326                                                 "target\n");
1327                         return 1;
1328                 }
1329                 if ((temp_len = strnlen(devname, 300)) < 300) {
1330                         vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1331                         if (vol->UNC == NULL)
1332                                 return 1;
1333                         strcpy(vol->UNC, devname);
1334                         if (strncmp(vol->UNC, "//", 2) == 0) {
1335                                 vol->UNC[0] = '\\';
1336                                 vol->UNC[1] = '\\';
1337                         } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1338                                 printk(KERN_WARNING "CIFS: UNC Path does not "
1339                                                     "begin with // or \\\\ \n");
1340                                 return 1;
1341                         }
1342                         value = strpbrk(vol->UNC+2, "/\\");
1343                         if (value)
1344                                 *value = '\\';
1345                 } else {
1346                         printk(KERN_WARNING "CIFS: UNC name too long\n");
1347                         return 1;
1348                 }
1349         }
1350         if (vol->UNCip == NULL)
1351                 vol->UNCip = &vol->UNC[2];
1352
1353         return 0;
1354 }
1355
1356 static struct TCP_Server_Info *
1357 cifs_find_tcp_session(struct sockaddr *addr)
1358 {
1359         struct list_head *tmp;
1360         struct TCP_Server_Info *server;
1361         struct sockaddr_in *addr4 = (struct sockaddr_in *) addr;
1362         struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) addr;
1363
1364         write_lock(&cifs_tcp_ses_lock);
1365         list_for_each(tmp, &cifs_tcp_ses_list) {
1366                 server = list_entry(tmp, struct TCP_Server_Info,
1367                                     tcp_ses_list);
1368                 /*
1369                  * the demux thread can exit on its own while still in CifsNew
1370                  * so don't accept any sockets in that state. Since the
1371                  * tcpStatus never changes back to CifsNew it's safe to check
1372                  * for this without a lock.
1373                  */
1374                 if (server->tcpStatus == CifsNew)
1375                         continue;
1376
1377                 if (addr->sa_family == AF_INET &&
1378                     (addr4->sin_addr.s_addr !=
1379                      server->addr.sockAddr.sin_addr.s_addr))
1380                         continue;
1381                 else if (addr->sa_family == AF_INET6 &&
1382                          memcmp(&server->addr.sockAddr6.sin6_addr,
1383                                 &addr6->sin6_addr, sizeof(addr6->sin6_addr)))
1384                         continue;
1385
1386                 ++server->srv_count;
1387                 write_unlock(&cifs_tcp_ses_lock);
1388                 cFYI(1, ("Existing tcp session with server found"));
1389                 return server;
1390         }
1391         write_unlock(&cifs_tcp_ses_lock);
1392         return NULL;
1393 }
1394
1395 static void
1396 cifs_put_tcp_session(struct TCP_Server_Info *server)
1397 {
1398         struct task_struct *task;
1399
1400         write_lock(&cifs_tcp_ses_lock);
1401         if (--server->srv_count > 0) {
1402                 write_unlock(&cifs_tcp_ses_lock);
1403                 return;
1404         }
1405
1406         list_del_init(&server->tcp_ses_list);
1407         write_unlock(&cifs_tcp_ses_lock);
1408
1409         spin_lock(&GlobalMid_Lock);
1410         server->tcpStatus = CifsExiting;
1411         spin_unlock(&GlobalMid_Lock);
1412
1413         task = xchg(&server->tsk, NULL);
1414         if (task)
1415                 force_sig(SIGKILL, task);
1416 }
1417
1418 static struct TCP_Server_Info *
1419 cifs_get_tcp_session(struct smb_vol *volume_info)
1420 {
1421         struct TCP_Server_Info *tcp_ses = NULL;
1422         struct sockaddr addr;
1423         struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
1424         struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
1425         int rc;
1426
1427         memset(&addr, 0, sizeof(struct sockaddr));
1428
1429         if (volume_info->UNCip && volume_info->UNC) {
1430                 rc = cifs_inet_pton(AF_INET, volume_info->UNCip,
1431                                     &sin_server->sin_addr.s_addr);
1432
1433                 if (rc <= 0) {
1434                         /* not ipv4 address, try ipv6 */
1435                         rc = cifs_inet_pton(AF_INET6, volume_info->UNCip,
1436                                             &sin_server6->sin6_addr.in6_u);
1437                         if (rc > 0)
1438                                 addr.sa_family = AF_INET6;
1439                 } else {
1440                         addr.sa_family = AF_INET;
1441                 }
1442
1443                 if (rc <= 0) {
1444                         /* we failed translating address */
1445                         rc = -EINVAL;
1446                         goto out_err;
1447                 }
1448
1449                 cFYI(1, ("UNC: %s ip: %s", volume_info->UNC,
1450                          volume_info->UNCip));
1451         } else if (volume_info->UNCip) {
1452                 /* BB using ip addr as tcp_ses name to connect to the
1453                    DFS root below */
1454                 cERROR(1, ("Connecting to DFS root not implemented yet"));
1455                 rc = -EINVAL;
1456                 goto out_err;
1457         } else /* which tcp_sess DFS root would we conect to */ {
1458                 cERROR(1,
1459                        ("CIFS mount error: No UNC path (e.g. -o "
1460                         "unc=//192.168.1.100/public) specified"));
1461                 rc = -EINVAL;
1462                 goto out_err;
1463         }
1464
1465         /* see if we already have a matching tcp_ses */
1466         tcp_ses = cifs_find_tcp_session(&addr);
1467         if (tcp_ses)
1468                 return tcp_ses;
1469
1470         tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1471         if (!tcp_ses) {
1472                 rc = -ENOMEM;
1473                 goto out_err;
1474         }
1475
1476         tcp_ses->hostname = extract_hostname(volume_info->UNC);
1477         if (IS_ERR(tcp_ses->hostname)) {
1478                 rc = PTR_ERR(tcp_ses->hostname);
1479                 goto out_err;
1480         }
1481
1482         tcp_ses->noblocksnd = volume_info->noblocksnd;
1483         tcp_ses->noautotune = volume_info->noautotune;
1484         atomic_set(&tcp_ses->inFlight, 0);
1485         init_waitqueue_head(&tcp_ses->response_q);
1486         init_waitqueue_head(&tcp_ses->request_q);
1487         INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
1488         mutex_init(&tcp_ses->srv_mutex);
1489         memcpy(tcp_ses->workstation_RFC1001_name,
1490                 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1491         memcpy(tcp_ses->server_RFC1001_name,
1492                 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1493         tcp_ses->sequence_number = 0;
1494         INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
1495         INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
1496
1497         /*
1498          * at this point we are the only ones with the pointer
1499          * to the struct since the kernel thread not created yet
1500          * no need to spinlock this init of tcpStatus or srv_count
1501          */
1502         tcp_ses->tcpStatus = CifsNew;
1503         ++tcp_ses->srv_count;
1504
1505         if (addr.sa_family == AF_INET6) {
1506                 cFYI(1, ("attempting ipv6 connect"));
1507                 /* BB should we allow ipv6 on port 139? */
1508                 /* other OS never observed in Wild doing 139 with v6 */
1509                 memcpy(&tcp_ses->addr.sockAddr6, sin_server6,
1510                         sizeof(struct sockaddr_in6));
1511                 sin_server6->sin6_port = htons(volume_info->port);
1512                 rc = ipv6_connect(tcp_ses);
1513         } else {
1514                 memcpy(&tcp_ses->addr.sockAddr, sin_server,
1515                         sizeof(struct sockaddr_in));
1516                 sin_server->sin_port = htons(volume_info->port);
1517                 rc = ipv4_connect(tcp_ses);
1518         }
1519         if (rc < 0) {
1520                 cERROR(1, ("Error connecting to socket. Aborting operation"));
1521                 goto out_err;
1522         }
1523
1524         /*
1525          * since we're in a cifs function already, we know that
1526          * this will succeed. No need for try_module_get().
1527          */
1528         __module_get(THIS_MODULE);
1529         tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread,
1530                                   tcp_ses, "cifsd");
1531         if (IS_ERR(tcp_ses->tsk)) {
1532                 rc = PTR_ERR(tcp_ses->tsk);
1533                 cERROR(1, ("error %d create cifsd thread", rc));
1534                 module_put(THIS_MODULE);
1535                 goto out_err;
1536         }
1537
1538         /* thread spawned, put it on the list */
1539         write_lock(&cifs_tcp_ses_lock);
1540         list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
1541         write_unlock(&cifs_tcp_ses_lock);
1542
1543         return tcp_ses;
1544
1545 out_err:
1546         if (tcp_ses) {
1547                 kfree(tcp_ses->hostname);
1548                 if (tcp_ses->ssocket)
1549                         sock_release(tcp_ses->ssocket);
1550                 kfree(tcp_ses);
1551         }
1552         return ERR_PTR(rc);
1553 }
1554
1555 static struct cifsSesInfo *
1556 cifs_find_smb_ses(struct TCP_Server_Info *server, char *username)
1557 {
1558         struct list_head *tmp;
1559         struct cifsSesInfo *ses;
1560
1561         write_lock(&cifs_tcp_ses_lock);
1562         list_for_each(tmp, &server->smb_ses_list) {
1563                 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
1564                 if (strncmp(ses->userName, username, MAX_USERNAME_SIZE))
1565                         continue;
1566
1567                 ++ses->ses_count;
1568                 write_unlock(&cifs_tcp_ses_lock);
1569                 return ses;
1570         }
1571         write_unlock(&cifs_tcp_ses_lock);
1572         return NULL;
1573 }
1574
1575 static void
1576 cifs_put_smb_ses(struct cifsSesInfo *ses)
1577 {
1578         int xid;
1579         struct TCP_Server_Info *server = ses->server;
1580
1581         write_lock(&cifs_tcp_ses_lock);
1582         if (--ses->ses_count > 0) {
1583                 write_unlock(&cifs_tcp_ses_lock);
1584                 return;
1585         }
1586
1587         list_del_init(&ses->smb_ses_list);
1588         write_unlock(&cifs_tcp_ses_lock);
1589
1590         if (ses->status == CifsGood) {
1591                 xid = GetXid();
1592                 CIFSSMBLogoff(xid, ses);
1593                 _FreeXid(xid);
1594         }
1595         sesInfoFree(ses);
1596         cifs_put_tcp_session(server);
1597 }
1598
1599 static struct cifsTconInfo *
1600 cifs_find_tcon(struct cifsSesInfo *ses, const char *unc)
1601 {
1602         struct list_head *tmp;
1603         struct cifsTconInfo *tcon;
1604
1605         write_lock(&cifs_tcp_ses_lock);
1606         list_for_each(tmp, &ses->tcon_list) {
1607                 tcon = list_entry(tmp, struct cifsTconInfo, tcon_list);
1608                 if (tcon->tidStatus == CifsExiting)
1609                         continue;
1610                 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
1611                         continue;
1612
1613                 ++tcon->tc_count;
1614                 write_unlock(&cifs_tcp_ses_lock);
1615                 return tcon;
1616         }
1617         write_unlock(&cifs_tcp_ses_lock);
1618         return NULL;
1619 }
1620
1621 static void
1622 cifs_put_tcon(struct cifsTconInfo *tcon)
1623 {
1624         int xid;
1625         struct cifsSesInfo *ses = tcon->ses;
1626
1627         write_lock(&cifs_tcp_ses_lock);
1628         if (--tcon->tc_count > 0) {
1629                 write_unlock(&cifs_tcp_ses_lock);
1630                 return;
1631         }
1632
1633         list_del_init(&tcon->tcon_list);
1634         write_unlock(&cifs_tcp_ses_lock);
1635
1636         xid = GetXid();
1637         CIFSSMBTDis(xid, tcon);
1638         _FreeXid(xid);
1639
1640         DeleteTconOplockQEntries(tcon);
1641         tconInfoFree(tcon);
1642         cifs_put_smb_ses(ses);
1643 }
1644
1645 int
1646 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
1647              const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
1648              struct dfs_info3_param **preferrals, int remap)
1649 {
1650         char *temp_unc;
1651         int rc = 0;
1652
1653         *pnum_referrals = 0;
1654         *preferrals = NULL;
1655
1656         if (pSesInfo->ipc_tid == 0) {
1657                 temp_unc = kmalloc(2 /* for slashes */ +
1658                         strnlen(pSesInfo->serverName,
1659                                 SERVER_NAME_LEN_WITH_NULL * 2)
1660                                  + 1 + 4 /* slash IPC$ */  + 2,
1661                                 GFP_KERNEL);
1662                 if (temp_unc == NULL)
1663                         return -ENOMEM;
1664                 temp_unc[0] = '\\';
1665                 temp_unc[1] = '\\';
1666                 strcpy(temp_unc + 2, pSesInfo->serverName);
1667                 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1668                 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1669                 cFYI(1,
1670                      ("CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid));
1671                 kfree(temp_unc);
1672         }
1673         if (rc == 0)
1674                 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1675                                      pnum_referrals, nls_codepage, remap);
1676         /* BB map targetUNCs to dfs_info3 structures, here or
1677                 in CIFSGetDFSRefer BB */
1678
1679         return rc;
1680 }
1681
1682 #ifdef CONFIG_DEBUG_LOCK_ALLOC
1683 static struct lock_class_key cifs_key[2];
1684 static struct lock_class_key cifs_slock_key[2];
1685
1686 static inline void
1687 cifs_reclassify_socket4(struct socket *sock)
1688 {
1689         struct sock *sk = sock->sk;
1690         BUG_ON(sock_owned_by_user(sk));
1691         sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
1692                 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
1693 }
1694
1695 static inline void
1696 cifs_reclassify_socket6(struct socket *sock)
1697 {
1698         struct sock *sk = sock->sk;
1699         BUG_ON(sock_owned_by_user(sk));
1700         sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
1701                 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
1702 }
1703 #else
1704 static inline void
1705 cifs_reclassify_socket4(struct socket *sock)
1706 {
1707 }
1708
1709 static inline void
1710 cifs_reclassify_socket6(struct socket *sock)
1711 {
1712 }
1713 #endif
1714
1715 /* See RFC1001 section 14 on representation of Netbios names */
1716 static void rfc1002mangle(char *target, char *source, unsigned int length)
1717 {
1718         unsigned int i, j;
1719
1720         for (i = 0, j = 0; i < (length); i++) {
1721                 /* mask a nibble at a time and encode */
1722                 target[j] = 'A' + (0x0F & (source[i] >> 4));
1723                 target[j+1] = 'A' + (0x0F & source[i]);
1724                 j += 2;
1725         }
1726
1727 }
1728
1729
1730 static int
1731 ipv4_connect(struct TCP_Server_Info *server)
1732 {
1733         int rc = 0;
1734         bool connected = false;
1735         __be16 orig_port = 0;
1736         struct socket *socket = server->ssocket;
1737
1738         if (socket == NULL) {
1739                 rc = sock_create_kern(PF_INET, SOCK_STREAM,
1740                                       IPPROTO_TCP, &socket);
1741                 if (rc < 0) {
1742                         cERROR(1, ("Error %d creating socket", rc));
1743                         return rc;
1744                 }
1745
1746                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1747                 cFYI(1, ("Socket created"));
1748                 server->ssocket = socket;
1749                 socket->sk->sk_allocation = GFP_NOFS;
1750                 cifs_reclassify_socket4(socket);
1751         }
1752
1753         /* user overrode default port */
1754         if (server->addr.sockAddr.sin_port) {
1755                 rc = socket->ops->connect(socket, (struct sockaddr *)
1756                                           &server->addr.sockAddr,
1757                                           sizeof(struct sockaddr_in), 0);
1758                 if (rc >= 0)
1759                         connected = true;
1760         }
1761
1762         if (!connected) {
1763                 /* save original port so we can retry user specified port
1764                         later if fall back ports fail this time  */
1765                 orig_port = server->addr.sockAddr.sin_port;
1766
1767                 /* do not retry on the same port we just failed on */
1768                 if (server->addr.sockAddr.sin_port != htons(CIFS_PORT)) {
1769                         server->addr.sockAddr.sin_port = htons(CIFS_PORT);
1770                         rc = socket->ops->connect(socket,
1771                                                 (struct sockaddr *)
1772                                                 &server->addr.sockAddr,
1773                                                 sizeof(struct sockaddr_in), 0);
1774                         if (rc >= 0)
1775                                 connected = true;
1776                 }
1777         }
1778         if (!connected) {
1779                 server->addr.sockAddr.sin_port = htons(RFC1001_PORT);
1780                 rc = socket->ops->connect(socket, (struct sockaddr *)
1781                                               &server->addr.sockAddr,
1782                                               sizeof(struct sockaddr_in), 0);
1783                 if (rc >= 0)
1784                         connected = true;
1785         }
1786
1787         /* give up here - unless we want to retry on different
1788                 protocol families some day */
1789         if (!connected) {
1790                 if (orig_port)
1791                         server->addr.sockAddr.sin_port = orig_port;
1792                 cFYI(1, ("Error %d connecting to server via ipv4", rc));
1793                 sock_release(socket);
1794                 server->ssocket = NULL;
1795                 return rc;
1796         }
1797
1798
1799         /*
1800          * Eventually check for other socket options to change from
1801          *  the default. sock_setsockopt not used because it expects
1802          *  user space buffer
1803          */
1804         socket->sk->sk_rcvtimeo = 7 * HZ;
1805         socket->sk->sk_sndtimeo = 3 * HZ;
1806
1807         /* make the bufsizes depend on wsize/rsize and max requests */
1808         if (server->noautotune) {
1809                 if (socket->sk->sk_sndbuf < (200 * 1024))
1810                         socket->sk->sk_sndbuf = 200 * 1024;
1811                 if (socket->sk->sk_rcvbuf < (140 * 1024))
1812                         socket->sk->sk_rcvbuf = 140 * 1024;
1813         }
1814
1815          cFYI(1, ("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
1816                  socket->sk->sk_sndbuf,
1817                  socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo));
1818
1819         /* send RFC1001 sessinit */
1820         if (server->addr.sockAddr.sin_port == htons(RFC1001_PORT)) {
1821                 /* some servers require RFC1001 sessinit before sending
1822                 negprot - BB check reconnection in case where second
1823                 sessinit is sent but no second negprot */
1824                 struct rfc1002_session_packet *ses_init_buf;
1825                 struct smb_hdr *smb_buf;
1826                 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
1827                                        GFP_KERNEL);
1828                 if (ses_init_buf) {
1829                         ses_init_buf->trailer.session_req.called_len = 32;
1830                         if (server->server_RFC1001_name &&
1831                             server->server_RFC1001_name[0] != 0)
1832                                 rfc1002mangle(ses_init_buf->trailer.
1833                                                 session_req.called_name,
1834                                               server->server_RFC1001_name,
1835                                               RFC1001_NAME_LEN_WITH_NULL);
1836                         else
1837                                 rfc1002mangle(ses_init_buf->trailer.
1838                                                 session_req.called_name,
1839                                               DEFAULT_CIFS_CALLED_NAME,
1840                                               RFC1001_NAME_LEN_WITH_NULL);
1841
1842                         ses_init_buf->trailer.session_req.calling_len = 32;
1843
1844                         /* calling name ends in null (byte 16) from old smb
1845                         convention. */
1846                         if (server->workstation_RFC1001_name &&
1847                             server->workstation_RFC1001_name[0] != 0)
1848                                 rfc1002mangle(ses_init_buf->trailer.
1849                                                 session_req.calling_name,
1850                                               server->workstation_RFC1001_name,
1851                                               RFC1001_NAME_LEN_WITH_NULL);
1852                         else
1853                                 rfc1002mangle(ses_init_buf->trailer.
1854                                                 session_req.calling_name,
1855                                               "LINUX_CIFS_CLNT",
1856                                               RFC1001_NAME_LEN_WITH_NULL);
1857
1858                         ses_init_buf->trailer.session_req.scope1 = 0;
1859                         ses_init_buf->trailer.session_req.scope2 = 0;
1860                         smb_buf = (struct smb_hdr *)ses_init_buf;
1861                         /* sizeof RFC1002_SESSION_REQUEST with no scope */
1862                         smb_buf->smb_buf_length = 0x81000044;
1863                         rc = smb_send(socket, smb_buf, 0x44,
1864                                 (struct sockaddr *) &server->addr.sockAddr,
1865                                 server->noblocksnd);
1866                         kfree(ses_init_buf);
1867                         msleep(1); /* RFC1001 layer in at least one server
1868                                       requires very short break before negprot
1869                                       presumably because not expecting negprot
1870                                       to follow so fast.  This is a simple
1871                                       solution that works without
1872                                       complicating the code and causes no
1873                                       significant slowing down on mount
1874                                       for everyone else */
1875                 }
1876                 /* else the negprot may still work without this
1877                 even though malloc failed */
1878
1879         }
1880
1881         return rc;
1882 }
1883
1884 static int
1885 ipv6_connect(struct TCP_Server_Info *server)
1886 {
1887         int rc = 0;
1888         bool connected = false;
1889         __be16 orig_port = 0;
1890         struct socket *socket = server->ssocket;
1891
1892         if (socket == NULL) {
1893                 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
1894                                       IPPROTO_TCP, &socket);
1895                 if (rc < 0) {
1896                         cERROR(1, ("Error %d creating ipv6 socket", rc));
1897                         socket = NULL;
1898                         return rc;
1899                 }
1900
1901                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1902                 cFYI(1, ("ipv6 Socket created"));
1903                 server->ssocket = socket;
1904                 socket->sk->sk_allocation = GFP_NOFS;
1905                 cifs_reclassify_socket6(socket);
1906         }
1907
1908         /* user overrode default port */
1909         if (server->addr.sockAddr6.sin6_port) {
1910                 rc = socket->ops->connect(socket,
1911                                 (struct sockaddr *) &server->addr.sockAddr6,
1912                                 sizeof(struct sockaddr_in6), 0);
1913                 if (rc >= 0)
1914                         connected = true;
1915         }
1916
1917         if (!connected) {
1918                 /* save original port so we can retry user specified port
1919                         later if fall back ports fail this time  */
1920
1921                 orig_port = server->addr.sockAddr6.sin6_port;
1922                 /* do not retry on the same port we just failed on */
1923                 if (server->addr.sockAddr6.sin6_port != htons(CIFS_PORT)) {
1924                         server->addr.sockAddr6.sin6_port = htons(CIFS_PORT);
1925                         rc = socket->ops->connect(socket, (struct sockaddr *)
1926                                         &server->addr.sockAddr6,
1927                                         sizeof(struct sockaddr_in6), 0);
1928                         if (rc >= 0)
1929                                 connected = true;
1930                 }
1931         }
1932         if (!connected) {
1933                 server->addr.sockAddr6.sin6_port = htons(RFC1001_PORT);
1934                 rc = socket->ops->connect(socket, (struct sockaddr *)
1935                                 &server->addr.sockAddr6,
1936                                 sizeof(struct sockaddr_in6), 0);
1937                 if (rc >= 0)
1938                         connected = true;
1939         }
1940
1941         /* give up here - unless we want to retry on different
1942                 protocol families some day */
1943         if (!connected) {
1944                 if (orig_port)
1945                         server->addr.sockAddr6.sin6_port = orig_port;
1946                 cFYI(1, ("Error %d connecting to server via ipv6", rc));
1947                 sock_release(socket);
1948                 server->ssocket = NULL;
1949                 return rc;
1950         }
1951
1952         /*
1953          * Eventually check for other socket options to change from
1954          * the default. sock_setsockopt not used because it expects
1955          * user space buffer
1956          */
1957         socket->sk->sk_rcvtimeo = 7 * HZ;
1958         socket->sk->sk_sndtimeo = 3 * HZ;
1959         server->ssocket = socket;
1960
1961         return rc;
1962 }
1963
1964 void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
1965                           struct super_block *sb, struct smb_vol *vol_info)
1966 {
1967         /* if we are reconnecting then should we check to see if
1968          * any requested capabilities changed locally e.g. via
1969          * remount but we can not do much about it here
1970          * if they have (even if we could detect it by the following)
1971          * Perhaps we could add a backpointer to array of sb from tcon
1972          * or if we change to make all sb to same share the same
1973          * sb as NFS - then we only have one backpointer to sb.
1974          * What if we wanted to mount the server share twice once with
1975          * and once without posixacls or posix paths? */
1976         __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1977
1978         if (vol_info && vol_info->no_linux_ext) {
1979                 tcon->fsUnixInfo.Capability = 0;
1980                 tcon->unix_ext = 0; /* Unix Extensions disabled */
1981                 cFYI(1, ("Linux protocol extensions disabled"));
1982                 return;
1983         } else if (vol_info)
1984                 tcon->unix_ext = 1; /* Unix Extensions supported */
1985
1986         if (tcon->unix_ext == 0) {
1987                 cFYI(1, ("Unix extensions disabled so not set on reconnect"));
1988                 return;
1989         }
1990
1991         if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
1992                 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
1993
1994                 /* check for reconnect case in which we do not
1995                    want to change the mount behavior if we can avoid it */
1996                 if (vol_info == NULL) {
1997                         /* turn off POSIX ACL and PATHNAMES if not set
1998                            originally at mount time */
1999                         if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
2000                                 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
2001                         if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2002                                 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2003                                         cERROR(1, ("POSIXPATH support change"));
2004                                 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2005                         } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2006                                 cERROR(1, ("possible reconnect error"));
2007                                 cERROR(1,
2008                                         ("server disabled POSIX path support"));
2009                         }
2010                 }
2011
2012                 cap &= CIFS_UNIX_CAP_MASK;
2013                 if (vol_info && vol_info->no_psx_acl)
2014                         cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
2015                 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
2016                         cFYI(1, ("negotiated posix acl support"));
2017                         if (sb)
2018                                 sb->s_flags |= MS_POSIXACL;
2019                 }
2020
2021                 if (vol_info && vol_info->posix_paths == 0)
2022                         cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2023                 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
2024                         cFYI(1, ("negotiate posix pathnames"));
2025                         if (sb)
2026                                 CIFS_SB(sb)->mnt_cifs_flags |=
2027                                         CIFS_MOUNT_POSIX_PATHS;
2028                 }
2029
2030                 /* We might be setting the path sep back to a different
2031                 form if we are reconnecting and the server switched its
2032                 posix path capability for this share */
2033                 if (sb && (CIFS_SB(sb)->prepathlen > 0))
2034                         CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
2035
2036                 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
2037                         if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
2038                                 CIFS_SB(sb)->rsize = 127 * 1024;
2039                                 cFYI(DBG2,
2040                                         ("larger reads not supported by srv"));
2041                         }
2042                 }
2043
2044
2045                 cFYI(1, ("Negotiate caps 0x%x", (int)cap));
2046 #ifdef CONFIG_CIFS_DEBUG2
2047                 if (cap & CIFS_UNIX_FCNTL_CAP)
2048                         cFYI(1, ("FCNTL cap"));
2049                 if (cap & CIFS_UNIX_EXTATTR_CAP)
2050                         cFYI(1, ("EXTATTR cap"));
2051                 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2052                         cFYI(1, ("POSIX path cap"));
2053                 if (cap & CIFS_UNIX_XATTR_CAP)
2054                         cFYI(1, ("XATTR cap"));
2055                 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
2056                         cFYI(1, ("POSIX ACL cap"));
2057                 if (cap & CIFS_UNIX_LARGE_READ_CAP)
2058                         cFYI(1, ("very large read cap"));
2059                 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
2060                         cFYI(1, ("very large write cap"));
2061 #endif /* CIFS_DEBUG2 */
2062                 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
2063                         if (vol_info == NULL) {
2064                                 cFYI(1, ("resetting capabilities failed"));
2065                         } else
2066                                 cERROR(1, ("Negotiating Unix capabilities "
2067                                            "with the server failed.  Consider "
2068                                            "mounting with the Unix Extensions\n"
2069                                            "disabled, if problems are found, "
2070                                            "by specifying the nounix mount "
2071                                            "option."));
2072
2073                 }
2074         }
2075 }
2076
2077 static void
2078 convert_delimiter(char *path, char delim)
2079 {
2080         int i;
2081         char old_delim;
2082
2083         if (path == NULL)
2084                 return;
2085
2086         if (delim == '/')
2087                 old_delim = '\\';
2088         else
2089                 old_delim = '/';
2090
2091         for (i = 0; path[i] != '\0'; i++) {
2092                 if (path[i] == old_delim)
2093                         path[i] = delim;
2094         }
2095 }
2096
2097 static void setup_cifs_sb(struct smb_vol *pvolume_info,
2098                           struct cifs_sb_info *cifs_sb)
2099 {
2100         if (pvolume_info->rsize > CIFSMaxBufSize) {
2101                 cERROR(1, ("rsize %d too large, using MaxBufSize",
2102                         pvolume_info->rsize));
2103                 cifs_sb->rsize = CIFSMaxBufSize;
2104         } else if ((pvolume_info->rsize) &&
2105                         (pvolume_info->rsize <= CIFSMaxBufSize))
2106                 cifs_sb->rsize = pvolume_info->rsize;
2107         else /* default */
2108                 cifs_sb->rsize = CIFSMaxBufSize;
2109
2110         if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
2111                 cERROR(1, ("wsize %d too large, using 4096 instead",
2112                           pvolume_info->wsize));
2113                 cifs_sb->wsize = 4096;
2114         } else if (pvolume_info->wsize)
2115                 cifs_sb->wsize = pvolume_info->wsize;
2116         else
2117                 cifs_sb->wsize = min_t(const int,
2118                                         PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2119                                         127*1024);
2120                 /* old default of CIFSMaxBufSize was too small now
2121                    that SMB Write2 can send multiple pages in kvec.
2122                    RFC1001 does not describe what happens when frame
2123                    bigger than 128K is sent so use that as max in
2124                    conjunction with 52K kvec constraint on arch with 4K
2125                    page size  */
2126
2127         if (cifs_sb->rsize < 2048) {
2128                 cifs_sb->rsize = 2048;
2129                 /* Windows ME may prefer this */
2130                 cFYI(1, ("readsize set to minimum: 2048"));
2131         }
2132         /* calculate prepath */
2133         cifs_sb->prepath = pvolume_info->prepath;
2134         if (cifs_sb->prepath) {
2135                 cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2136                 /* we can not convert the / to \ in the path
2137                 separators in the prefixpath yet because we do not
2138                 know (until reset_cifs_unix_caps is called later)
2139                 whether POSIX PATH CAP is available. We normalize
2140                 the / to \ after reset_cifs_unix_caps is called */
2141                 pvolume_info->prepath = NULL;
2142         } else
2143                 cifs_sb->prepathlen = 0;
2144         cifs_sb->mnt_uid = pvolume_info->linux_uid;
2145         cifs_sb->mnt_gid = pvolume_info->linux_gid;
2146         cifs_sb->mnt_file_mode = pvolume_info->file_mode;
2147         cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
2148         cFYI(1, ("file mode: 0x%x  dir mode: 0x%x",
2149                 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode));
2150
2151         if (pvolume_info->noperm)
2152                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2153         if (pvolume_info->setuids)
2154                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2155         if (pvolume_info->server_ino)
2156                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2157         if (pvolume_info->remap)
2158                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2159         if (pvolume_info->no_xattr)
2160                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2161         if (pvolume_info->sfu_emul)
2162                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2163         if (pvolume_info->nobrl)
2164                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2165         if (pvolume_info->mand_lock)
2166                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
2167         if (pvolume_info->cifs_acl)
2168                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2169         if (pvolume_info->override_uid)
2170                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2171         if (pvolume_info->override_gid)
2172                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2173         if (pvolume_info->dynperm)
2174                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
2175         if (pvolume_info->direct_io) {
2176                 cFYI(1, ("mounting share using direct i/o"));
2177                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2178         }
2179
2180         if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
2181                 cERROR(1, ("mount option dynperm ignored if cifsacl "
2182                            "mount option supported"));
2183 }
2184
2185 int
2186 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
2187            char *mount_data, const char *devname)
2188 {
2189         int rc = 0;
2190         int xid;
2191         struct smb_vol *volume_info;
2192         struct cifsSesInfo *pSesInfo = NULL;
2193         struct cifsTconInfo *tcon = NULL;
2194         struct TCP_Server_Info *srvTcp = NULL;
2195
2196         xid = GetXid();
2197
2198         volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
2199         if (!volume_info) {
2200                 rc = -ENOMEM;
2201                 goto out;
2202         }
2203
2204         if (cifs_parse_mount_options(mount_data, devname, volume_info)) {
2205                 rc = -EINVAL;
2206                 goto out;
2207         }
2208
2209         if (volume_info->nullauth) {
2210                 cFYI(1, ("null user"));
2211                 volume_info->username = "";
2212         } else if (volume_info->username) {
2213                 /* BB fixme parse for domain name here */
2214                 cFYI(1, ("Username: %s", volume_info->username));
2215         } else {
2216                 cifserror("No username specified");
2217         /* In userspace mount helper we can get user name from alternate
2218            locations such as env variables and files on disk */
2219                 rc = -EINVAL;
2220                 goto out;
2221         }
2222
2223
2224         /* this is needed for ASCII cp to Unicode converts */
2225         if (volume_info->iocharset == NULL) {
2226                 cifs_sb->local_nls = load_nls_default();
2227         /* load_nls_default can not return null */
2228         } else {
2229                 cifs_sb->local_nls = load_nls(volume_info->iocharset);
2230                 if (cifs_sb->local_nls == NULL) {
2231                         cERROR(1, ("CIFS mount error: iocharset %s not found",
2232                                  volume_info->iocharset));
2233                         rc = -ELIBACC;
2234                         goto out;
2235                 }
2236         }
2237
2238         /* get a reference to a tcp session */
2239         srvTcp = cifs_get_tcp_session(volume_info);
2240         if (IS_ERR(srvTcp)) {
2241                 rc = PTR_ERR(srvTcp);
2242                 goto out;
2243         }
2244
2245         pSesInfo = cifs_find_smb_ses(srvTcp, volume_info->username);
2246         if (pSesInfo) {
2247                 cFYI(1, ("Existing smb sess found (status=%d)",
2248                         pSesInfo->status));
2249                 /*
2250                  * The existing SMB session already has a reference to srvTcp,
2251                  * so we can put back the extra one we got before
2252                  */
2253                 cifs_put_tcp_session(srvTcp);
2254
2255                 down(&pSesInfo->sesSem);
2256                 if (pSesInfo->need_reconnect) {
2257                         cFYI(1, ("Session needs reconnect"));
2258                         rc = cifs_setup_session(xid, pSesInfo,
2259                                                 cifs_sb->local_nls);
2260                 }
2261                 up(&pSesInfo->sesSem);
2262         } else if (!rc) {
2263                 cFYI(1, ("Existing smb sess not found"));
2264                 pSesInfo = sesInfoAlloc();
2265                 if (pSesInfo == NULL) {
2266                         rc = -ENOMEM;
2267                         goto mount_fail_check;
2268                 }
2269
2270                 /* new SMB session uses our srvTcp ref */
2271                 pSesInfo->server = srvTcp;
2272                 if (srvTcp->addr.sockAddr6.sin6_family == AF_INET6)
2273                         sprintf(pSesInfo->serverName, NIP6_FMT,
2274                                 NIP6(srvTcp->addr.sockAddr6.sin6_addr));
2275                 else
2276                         sprintf(pSesInfo->serverName, NIPQUAD_FMT,
2277                                 NIPQUAD(srvTcp->addr.sockAddr.sin_addr.s_addr));
2278
2279                 write_lock(&cifs_tcp_ses_lock);
2280                 list_add(&pSesInfo->smb_ses_list, &srvTcp->smb_ses_list);
2281                 write_unlock(&cifs_tcp_ses_lock);
2282
2283                 /* volume_info->password freed at unmount */
2284                 if (volume_info->password) {
2285                         pSesInfo->password = volume_info->password;
2286                         /* set to NULL to prevent freeing on exit */
2287                         volume_info->password = NULL;
2288                 }
2289                 if (volume_info->username)
2290                         strncpy(pSesInfo->userName, volume_info->username,
2291                                 MAX_USERNAME_SIZE);
2292                 if (volume_info->domainname) {
2293                         int len = strlen(volume_info->domainname);
2294                         pSesInfo->domainName = kmalloc(len + 1, GFP_KERNEL);
2295                         if (pSesInfo->domainName)
2296                                 strcpy(pSesInfo->domainName,
2297                                         volume_info->domainname);
2298                 }
2299                 pSesInfo->linux_uid = volume_info->linux_uid;
2300                 pSesInfo->overrideSecFlg = volume_info->secFlg;
2301                 down(&pSesInfo->sesSem);
2302
2303                 /* BB FIXME need to pass vol->secFlgs BB */
2304                 rc = cifs_setup_session(xid, pSesInfo,
2305                                         cifs_sb->local_nls);
2306                 up(&pSesInfo->sesSem);
2307         }
2308
2309         /* search for existing tcon to this server share */
2310         if (!rc) {
2311                 setup_cifs_sb(volume_info, cifs_sb);
2312
2313                 tcon = cifs_find_tcon(pSesInfo, volume_info->UNC);
2314                 if (tcon) {
2315                         cFYI(1, ("Found match on UNC path"));
2316                         /* existing tcon already has a reference */
2317                         cifs_put_smb_ses(pSesInfo);
2318                         if (tcon->seal != volume_info->seal)
2319                                 cERROR(1, ("transport encryption setting "
2320                                            "conflicts with existing tid"));
2321                 } else {
2322                         tcon = tconInfoAlloc();
2323                         if (tcon == NULL) {
2324                                 rc = -ENOMEM;
2325                                 goto mount_fail_check;
2326                         }
2327                         tcon->ses = pSesInfo;
2328
2329                         /* check for null share name ie connect to dfs root */
2330                         if ((strchr(volume_info->UNC + 3, '\\') == NULL)
2331                             && (strchr(volume_info->UNC + 3, '/') == NULL)) {
2332                                 /* rc = connect_to_dfs_path(...) */
2333                                 cFYI(1, ("DFS root not supported"));
2334                                 rc = -ENODEV;
2335                                 goto mount_fail_check;
2336                         } else {
2337                                 /* BB Do we need to wrap sesSem around
2338                                  * this TCon call and Unix SetFS as
2339                                  * we do on SessSetup and reconnect? */
2340                                 rc = CIFSTCon(xid, pSesInfo, volume_info->UNC,
2341                                               tcon, cifs_sb->local_nls);
2342                                 cFYI(1, ("CIFS Tcon rc = %d", rc));
2343                                 if (volume_info->nodfs) {
2344                                         tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
2345                                         cFYI(1, ("DFS disabled (%d)",
2346                                                 tcon->Flags));
2347                                 }
2348                         }
2349                         if (rc)
2350                                 goto mount_fail_check;
2351                         tcon->seal = volume_info->seal;
2352                         write_lock(&cifs_tcp_ses_lock);
2353                         list_add(&tcon->tcon_list, &pSesInfo->tcon_list);
2354                         write_unlock(&cifs_tcp_ses_lock);
2355                 }
2356
2357                 /* we can have only one retry value for a connection
2358                    to a share so for resources mounted more than once
2359                    to the same server share the last value passed in
2360                    for the retry flag is used */
2361                 tcon->retry = volume_info->retry;
2362                 tcon->nocase = volume_info->nocase;
2363                 tcon->local_lease = volume_info->local_lease;
2364         }
2365         if (pSesInfo) {
2366                 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
2367                         sb->s_maxbytes = (u64) 1 << 63;
2368                 } else
2369                         sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
2370         }
2371
2372         /* BB FIXME fix time_gran to be larger for LANMAN sessions */
2373         sb->s_time_gran = 100;
2374
2375 mount_fail_check:
2376         /* on error free sesinfo and tcon struct if needed */
2377         if (rc) {
2378                 /* If find_unc succeeded then rc == 0 so we can not end */
2379                 /* up accidently freeing someone elses tcon struct */
2380                 if (tcon)
2381                         cifs_put_tcon(tcon);
2382                 else if (pSesInfo)
2383                         cifs_put_smb_ses(pSesInfo);
2384                 else
2385                         cifs_put_tcp_session(srvTcp);
2386                 goto out;
2387         }
2388         cifs_sb->tcon = tcon;
2389
2390         /* do not care if following two calls succeed - informational */
2391         if (!tcon->ipc) {
2392                 CIFSSMBQFSDeviceInfo(xid, tcon);
2393                 CIFSSMBQFSAttributeInfo(xid, tcon);
2394         }
2395
2396         /* tell server which Unix caps we support */
2397         if (tcon->ses->capabilities & CAP_UNIX)
2398                 /* reset of caps checks mount to see if unix extensions
2399                    disabled for just this mount */
2400                 reset_cifs_unix_caps(xid, tcon, sb, volume_info);
2401         else
2402                 tcon->unix_ext = 0; /* server does not support them */
2403
2404         /* convert forward to back slashes in prepath here if needed */
2405         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2406                 convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb));
2407
2408         if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2409                 cifs_sb->rsize = 1024 * 127;
2410                 cFYI(DBG2, ("no very large read support, rsize now 127K"));
2411         }
2412         if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2413                 cifs_sb->wsize = min(cifs_sb->wsize,
2414                                (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2415         if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2416                 cifs_sb->rsize = min(cifs_sb->rsize,
2417                                (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2418
2419         /* volume_info->password is freed above when existing session found
2420         (in which case it is not needed anymore) but when new sesion is created
2421         the password ptr is put in the new session structure (in which case the
2422         password will be freed at unmount time) */
2423 out:
2424         /* zero out password before freeing */
2425         if (volume_info) {
2426                 if (volume_info->password != NULL) {
2427                         memset(volume_info->password, 0,
2428                                 strlen(volume_info->password));
2429                         kfree(volume_info->password);
2430                 }
2431                 kfree(volume_info->UNC);
2432                 kfree(volume_info->prepath);
2433                 kfree(volume_info);
2434         }
2435         FreeXid(xid);
2436         return rc;
2437 }
2438
2439 static int
2440 CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2441               char session_key[CIFS_SESS_KEY_SIZE],
2442               const struct nls_table *nls_codepage)
2443 {
2444         struct smb_hdr *smb_buffer;
2445         struct smb_hdr *smb_buffer_response;
2446         SESSION_SETUP_ANDX *pSMB;
2447         SESSION_SETUP_ANDX *pSMBr;
2448         char *bcc_ptr;
2449         char *user;
2450         char *domain;
2451         int rc = 0;
2452         int remaining_words = 0;
2453         int bytes_returned = 0;
2454         int len;
2455         __u32 capabilities;
2456         __u16 count;
2457
2458         cFYI(1, ("In sesssetup"));
2459         if (ses == NULL)
2460                 return -EINVAL;
2461         user = ses->userName;
2462         domain = ses->domainName;
2463         smb_buffer = cifs_buf_get();
2464
2465         if (smb_buffer == NULL)
2466                 return -ENOMEM;
2467
2468         smb_buffer_response = smb_buffer;
2469         pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2470
2471         /* send SMBsessionSetup here */
2472         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2473                         NULL /* no tCon exists yet */ , 13 /* wct */ );
2474
2475         smb_buffer->Mid = GetNextMid(ses->server);
2476         pSMB->req_no_secext.AndXCommand = 0xFF;
2477         pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2478         pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2479
2480         if (ses->server->secMode &
2481                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2482                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2483
2484         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2485                 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2486         if (ses->capabilities & CAP_UNICODE) {
2487                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2488                 capabilities |= CAP_UNICODE;
2489         }
2490         if (ses->capabilities & CAP_STATUS32) {
2491                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2492                 capabilities |= CAP_STATUS32;
2493         }
2494         if (ses->capabilities & CAP_DFS) {
2495                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2496                 capabilities |= CAP_DFS;
2497         }
2498         pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2499
2500         pSMB->req_no_secext.CaseInsensitivePasswordLength =
2501                 cpu_to_le16(CIFS_SESS_KEY_SIZE);
2502
2503         pSMB->req_no_secext.CaseSensitivePasswordLength =
2504             cpu_to_le16(CIFS_SESS_KEY_SIZE);
2505         bcc_ptr = pByteArea(smb_buffer);
2506         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2507         bcc_ptr += CIFS_SESS_KEY_SIZE;
2508         memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2509         bcc_ptr += CIFS_SESS_KEY_SIZE;
2510
2511         if (ses->capabilities & CAP_UNICODE) {
2512                 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2513                         *bcc_ptr = 0;
2514                         bcc_ptr++;
2515                 }
2516                 if (user == NULL)
2517                         bytes_returned = 0; /* skip null user */
2518                 else
2519                         bytes_returned =
2520                                 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
2521                                         nls_codepage);
2522                 /* convert number of 16 bit words to bytes */
2523                 bcc_ptr += 2 * bytes_returned;
2524                 bcc_ptr += 2;   /* trailing null */
2525                 if (domain == NULL)
2526                         bytes_returned =
2527                             cifs_strtoUCS((__le16 *) bcc_ptr,
2528                                           "CIFS_LINUX_DOM", 32, nls_codepage);
2529                 else
2530                         bytes_returned =
2531                             cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
2532                                           nls_codepage);
2533                 bcc_ptr += 2 * bytes_returned;
2534                 bcc_ptr += 2;
2535                 bytes_returned =
2536                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2537                                   32, nls_codepage);
2538                 bcc_ptr += 2 * bytes_returned;
2539                 bytes_returned =
2540                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release,
2541                                   32, nls_codepage);
2542                 bcc_ptr += 2 * bytes_returned;
2543                 bcc_ptr += 2;
2544                 bytes_returned =
2545                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2546                                   64, nls_codepage);
2547                 bcc_ptr += 2 * bytes_returned;
2548                 bcc_ptr += 2;
2549         } else {
2550                 if (user != NULL) {
2551                     strncpy(bcc_ptr, user, 200);
2552                     bcc_ptr += strnlen(user, 200);
2553                 }
2554                 *bcc_ptr = 0;
2555                 bcc_ptr++;
2556                 if (domain == NULL) {
2557                         strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2558                         bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2559                 } else {
2560                         strncpy(bcc_ptr, domain, 64);
2561                         bcc_ptr += strnlen(domain, 64);
2562                         *bcc_ptr = 0;
2563                         bcc_ptr++;
2564                 }
2565                 strcpy(bcc_ptr, "Linux version ");
2566                 bcc_ptr += strlen("Linux version ");
2567                 strcpy(bcc_ptr, utsname()->release);
2568                 bcc_ptr += strlen(utsname()->release) + 1;
2569                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2570                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2571         }
2572         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2573         smb_buffer->smb_buf_length += count;
2574         pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2575
2576         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2577                          &bytes_returned, CIFS_LONG_OP);
2578         if (rc) {
2579 /* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2580         } else if ((smb_buffer_response->WordCount == 3)
2581                    || (smb_buffer_response->WordCount == 4)) {
2582                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2583                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2584                 if (action & GUEST_LOGIN)
2585                         cFYI(1, ("Guest login")); /* BB mark SesInfo struct? */
2586                 ses->Suid = smb_buffer_response->Uid; /* UID left in wire format
2587                                                          (little endian) */
2588                 cFYI(1, ("UID = %d ", ses->Suid));
2589         /* response can have either 3 or 4 word count - Samba sends 3 */
2590                 bcc_ptr = pByteArea(smb_buffer_response);
2591                 if ((pSMBr->resp.hdr.WordCount == 3)
2592                     || ((pSMBr->resp.hdr.WordCount == 4)
2593                         && (blob_len < pSMBr->resp.ByteCount))) {
2594                         if (pSMBr->resp.hdr.WordCount == 4)
2595                                 bcc_ptr += blob_len;
2596
2597                         if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2598                                 if ((long) (bcc_ptr) % 2) {
2599                                         remaining_words =
2600                                             (BCC(smb_buffer_response) - 1) / 2;
2601                                         /* Unicode strings must be word
2602                                            aligned */
2603                                         bcc_ptr++;
2604                                 } else {
2605                                         remaining_words =
2606                                                 BCC(smb_buffer_response) / 2;
2607                                 }
2608                                 len =
2609                                     UniStrnlen((wchar_t *) bcc_ptr,
2610                                                remaining_words - 1);
2611 /* We look for obvious messed up bcc or strings in response so we do not go off
2612    the end since (at least) WIN2K and Windows XP have a major bug in not null
2613    terminating last Unicode string in response  */
2614                                 if (ses->serverOS)
2615                                         kfree(ses->serverOS);
2616                                 ses->serverOS = kzalloc(2 * (len + 1),
2617                                                         GFP_KERNEL);
2618                                 if (ses->serverOS == NULL)
2619                                         goto sesssetup_nomem;
2620                                 cifs_strfromUCS_le(ses->serverOS,
2621                                                    (__le16 *)bcc_ptr,
2622                                                    len, nls_codepage);
2623                                 bcc_ptr += 2 * (len + 1);
2624                                 remaining_words -= len + 1;
2625                                 ses->serverOS[2 * len] = 0;
2626                                 ses->serverOS[1 + (2 * len)] = 0;
2627                                 if (remaining_words > 0) {
2628                                         len = UniStrnlen((wchar_t *)bcc_ptr,
2629                                                          remaining_words-1);
2630                                         kfree(ses->serverNOS);
2631                                         ses->serverNOS = kzalloc(2 * (len + 1),
2632                                                                  GFP_KERNEL);
2633                                         if (ses->serverNOS == NULL)
2634                                                 goto sesssetup_nomem;
2635                                         cifs_strfromUCS_le(ses->serverNOS,
2636                                                            (__le16 *)bcc_ptr,
2637                                                            len, nls_codepage);
2638                                         bcc_ptr += 2 * (len + 1);
2639                                         ses->serverNOS[2 * len] = 0;
2640                                         ses->serverNOS[1 + (2 * len)] = 0;
2641                                         if (strncmp(ses->serverNOS,
2642                                                 "NT LAN Manager 4", 16) == 0) {
2643                                                 cFYI(1, ("NT4 server"));
2644                                                 ses->flags |= CIFS_SES_NT4;
2645                                         }
2646                                         remaining_words -= len + 1;
2647                                         if (remaining_words > 0) {
2648                                                 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2649                                 /* last string is not always null terminated
2650                                    (for e.g. for Windows XP & 2000) */
2651                                                 if (ses->serverDomain)
2652                                                         kfree(ses->serverDomain);
2653                                                 ses->serverDomain =
2654                                                     kzalloc(2*(len+1),
2655                                                             GFP_KERNEL);
2656                                                 if (ses->serverDomain == NULL)
2657                                                         goto sesssetup_nomem;
2658                                                 cifs_strfromUCS_le(ses->serverDomain,
2659                                                         (__le16 *)bcc_ptr,
2660                                                         len, nls_codepage);
2661                                                 bcc_ptr += 2 * (len + 1);
2662                                                 ses->serverDomain[2*len] = 0;
2663                                                 ses->serverDomain[1+(2*len)] = 0;
2664                                         } else { /* else no more room so create
2665                                                   dummy domain string */
2666                                                 if (ses->serverDomain)
2667                                                         kfree(ses->serverDomain);
2668                                                 ses->serverDomain =
2669                                                         kzalloc(2, GFP_KERNEL);
2670                                         }
2671                                 } else { /* no room so create dummy domain
2672                                             and NOS string */
2673
2674                                         /* if these kcallocs fail not much we
2675                                            can do, but better to not fail the
2676                                            sesssetup itself */
2677                                         kfree(ses->serverDomain);
2678                                         ses->serverDomain =
2679                                             kzalloc(2, GFP_KERNEL);
2680                                         kfree(ses->serverNOS);
2681                                         ses->serverNOS =
2682                                             kzalloc(2, GFP_KERNEL);
2683                                 }
2684                         } else {        /* ASCII */
2685                                 len = strnlen(bcc_ptr, 1024);
2686                                 if (((long) bcc_ptr + len) - (long)
2687                                     pByteArea(smb_buffer_response)
2688                                             <= BCC(smb_buffer_response)) {
2689                                         kfree(ses->serverOS);
2690                                         ses->serverOS = kzalloc(len + 1,
2691                                                                 GFP_KERNEL);
2692                                         if (ses->serverOS == NULL)
2693                                                 goto sesssetup_nomem;
2694                                         strncpy(ses->serverOS, bcc_ptr, len);
2695
2696                                         bcc_ptr += len;
2697                                         /* null terminate the string */
2698                                         bcc_ptr[0] = 0;
2699                                         bcc_ptr++;
2700
2701                                         len = strnlen(bcc_ptr, 1024);
2702                                         kfree(ses->serverNOS);
2703                                         ses->serverNOS = kzalloc(len + 1,
2704                                                                  GFP_KERNEL);
2705                                         if (ses->serverNOS == NULL)
2706                                                 goto sesssetup_nomem;
2707                                         strncpy(ses->serverNOS, bcc_ptr, len);
2708                                         bcc_ptr += len;
2709                                         bcc_ptr[0] = 0;
2710                                         bcc_ptr++;
2711
2712                                         len = strnlen(bcc_ptr, 1024);
2713                                         if (ses->serverDomain)
2714                                                 kfree(ses->serverDomain);
2715                                         ses->serverDomain = kzalloc(len + 1,
2716                                                                     GFP_KERNEL);
2717                                         if (ses->serverDomain == NULL)
2718                                                 goto sesssetup_nomem;
2719                                         strncpy(ses->serverDomain, bcc_ptr,
2720                                                 len);
2721                                         bcc_ptr += len;
2722                                         bcc_ptr[0] = 0;
2723                                         bcc_ptr++;
2724                                 } else
2725                                         cFYI(1,
2726                                              ("Variable field of length %d "
2727                                                 "extends beyond end of smb ",
2728                                               len));
2729                         }
2730                 } else {
2731                         cERROR(1, ("Security Blob Length extends beyond "
2732                                 "end of SMB"));
2733                 }
2734         } else {
2735                 cERROR(1, ("Invalid Word count %d: ",
2736                         smb_buffer_response->WordCount));
2737                 rc = -EIO;
2738         }
2739 sesssetup_nomem:        /* do not return an error on nomem for the info strings,
2740                            since that could make reconnection harder, and
2741                            reconnection might be needed to free memory */
2742         cifs_buf_release(smb_buffer);
2743
2744         return rc;
2745 }
2746
2747 static int
2748 CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
2749                               struct cifsSesInfo *ses, bool *pNTLMv2_flag,
2750                               const struct nls_table *nls_codepage)
2751 {
2752         struct smb_hdr *smb_buffer;
2753         struct smb_hdr *smb_buffer_response;
2754         SESSION_SETUP_ANDX *pSMB;
2755         SESSION_SETUP_ANDX *pSMBr;
2756         char *bcc_ptr;
2757         char *domain;
2758         int rc = 0;
2759         int remaining_words = 0;
2760         int bytes_returned = 0;
2761         int len;
2762         int SecurityBlobLength = sizeof(NEGOTIATE_MESSAGE);
2763         PNEGOTIATE_MESSAGE SecurityBlob;
2764         PCHALLENGE_MESSAGE SecurityBlob2;
2765         __u32 negotiate_flags, capabilities;
2766         __u16 count;
2767
2768         cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
2769         if (ses == NULL)
2770                 return -EINVAL;
2771         domain = ses->domainName;
2772         *pNTLMv2_flag = false;
2773         smb_buffer = cifs_buf_get();
2774         if (smb_buffer == NULL) {
2775                 return -ENOMEM;
2776         }
2777         smb_buffer_response = smb_buffer;
2778         pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2779         pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2780
2781         /* send SMBsessionSetup here */
2782         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2783                         NULL /* no tCon exists yet */ , 12 /* wct */ );
2784
2785         smb_buffer->Mid = GetNextMid(ses->server);
2786         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2787         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2788
2789         pSMB->req.AndXCommand = 0xFF;
2790         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2791         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2792
2793         if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2794                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2795
2796         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2797             CAP_EXTENDED_SECURITY;
2798         if (ses->capabilities & CAP_UNICODE) {
2799                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2800                 capabilities |= CAP_UNICODE;
2801         }
2802         if (ses->capabilities & CAP_STATUS32) {
2803                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2804                 capabilities |= CAP_STATUS32;
2805         }
2806         if (ses->capabilities & CAP_DFS) {
2807                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2808                 capabilities |= CAP_DFS;
2809         }
2810         pSMB->req.Capabilities = cpu_to_le32(capabilities);
2811
2812         bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2813         SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2814         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2815         SecurityBlob->MessageType = NtLmNegotiate;
2816         negotiate_flags =
2817             NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2818             NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
2819             NTLMSSP_NEGOTIATE_56 |
2820             /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
2821         if (sign_CIFS_PDUs)
2822                 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2823 /*      if (ntlmv2_support)
2824                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;*/
2825         /* setup pointers to domain name and workstation name */
2826         bcc_ptr += SecurityBlobLength;
2827
2828         SecurityBlob->WorkstationName.Buffer = 0;
2829         SecurityBlob->WorkstationName.Length = 0;
2830         SecurityBlob->WorkstationName.MaximumLength = 0;
2831
2832         /* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
2833         along with username on auth request (ie the response to challenge) */
2834         SecurityBlob->DomainName.Buffer = 0;
2835         SecurityBlob->DomainName.Length = 0;
2836         SecurityBlob->DomainName.MaximumLength = 0;
2837         if (ses->capabilities & CAP_UNICODE) {
2838                 if ((long) bcc_ptr % 2) {
2839                         *bcc_ptr = 0;
2840                         bcc_ptr++;
2841                 }
2842
2843                 bytes_returned =
2844                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
2845                                   32, nls_codepage);
2846                 bcc_ptr += 2 * bytes_returned;
2847                 bytes_returned =
2848                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
2849                                   nls_codepage);
2850                 bcc_ptr += 2 * bytes_returned;
2851                 bcc_ptr += 2;   /* null terminate Linux version */
2852                 bytes_returned =
2853                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
2854                                   64, nls_codepage);
2855                 bcc_ptr += 2 * bytes_returned;
2856                 *(bcc_ptr + 1) = 0;
2857                 *(bcc_ptr + 2) = 0;
2858                 bcc_ptr += 2;   /* null terminate network opsys string */
2859                 *(bcc_ptr + 1) = 0;
2860                 *(bcc_ptr + 2) = 0;
2861                 bcc_ptr += 2;   /* null domain */
2862         } else {                /* ASCII */
2863                 strcpy(bcc_ptr, "Linux version ");
2864                 bcc_ptr += strlen("Linux version ");
2865                 strcpy(bcc_ptr, utsname()->release);
2866                 bcc_ptr += strlen(utsname()->release) + 1;
2867                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2868                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2869                 bcc_ptr++;      /* empty domain field */
2870                 *bcc_ptr = 0;
2871         }
2872         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2873         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2874         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2875         smb_buffer->smb_buf_length += count;
2876         pSMB->req.ByteCount = cpu_to_le16(count);
2877
2878         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
2879                          &bytes_returned, CIFS_LONG_OP);
2880
2881         if (smb_buffer_response->Status.CifsError ==
2882             cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
2883                 rc = 0;
2884
2885         if (rc) {
2886 /*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
2887         } else if ((smb_buffer_response->WordCount == 3)
2888                    || (smb_buffer_response->WordCount == 4)) {
2889                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2890                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2891
2892                 if (action & GUEST_LOGIN)
2893                         cFYI(1, ("Guest login"));
2894         /* Do we want to set anything in SesInfo struct when guest login? */
2895
2896                 bcc_ptr = pByteArea(smb_buffer_response);
2897         /* response can have either 3 or 4 word count - Samba sends 3 */
2898
2899                 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
2900                 if (SecurityBlob2->MessageType != NtLmChallenge) {
2901                         cFYI(1, ("Unexpected NTLMSSP message type received %d",
2902                               SecurityBlob2->MessageType));
2903                 } else if (ses) {
2904                         ses->Suid = smb_buffer_response->Uid; /* UID left in le format */
2905                         cFYI(1, ("UID = %d", ses->Suid));
2906                         if ((pSMBr->resp.hdr.WordCount == 3)
2907                             || ((pSMBr->resp.hdr.WordCount == 4)
2908                                 && (blob_len <
2909                                     pSMBr->resp.ByteCount))) {
2910
2911                                 if (pSMBr->resp.hdr.WordCount == 4) {
2912                                         bcc_ptr += blob_len;
2913                                         cFYI(1, ("Security Blob Length %d",
2914                                               blob_len));
2915                                 }
2916
2917                                 cFYI(1, ("NTLMSSP Challenge rcvd"));
2918
2919                                 memcpy(ses->server->cryptKey,
2920                                        SecurityBlob2->Challenge,
2921                                        CIFS_CRYPTO_KEY_SIZE);
2922                                 if (SecurityBlob2->NegotiateFlags &
2923                                         cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
2924                                         *pNTLMv2_flag = true;
2925
2926                                 if ((SecurityBlob2->NegotiateFlags &
2927                                         cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN))
2928                                         || (sign_CIFS_PDUs > 1))
2929                                                 ses->server->secMode |=
2930                                                         SECMODE_SIGN_REQUIRED;
2931                                 if ((SecurityBlob2->NegotiateFlags &
2932                                         cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
2933                                                 ses->server->secMode |=
2934                                                         SECMODE_SIGN_ENABLED;
2935
2936                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2937                                         if ((long) (bcc_ptr) % 2) {
2938                                                 remaining_words =
2939                                                     (BCC(smb_buffer_response)
2940                                                      - 1) / 2;
2941                                          /* Must word align unicode strings */
2942                                                 bcc_ptr++;
2943                                         } else {
2944                                                 remaining_words =
2945                                                     BCC
2946                                                     (smb_buffer_response) / 2;
2947                                         }
2948                                         len =
2949                                             UniStrnlen((wchar_t *) bcc_ptr,
2950                                                        remaining_words - 1);
2951 /* We look for obvious messed up bcc or strings in response so we do not go off
2952    the end since (at least) WIN2K and Windows XP have a major bug in not null
2953    terminating last Unicode string in response  */
2954                                         if (ses->serverOS)
2955                                                 kfree(ses->serverOS);
2956                                         ses->serverOS =
2957                                             kzalloc(2 * (len + 1), GFP_KERNEL);
2958                                         cifs_strfromUCS_le(ses->serverOS,
2959                                                            (__le16 *)
2960                                                            bcc_ptr, len,
2961                                                            nls_codepage);
2962                                         bcc_ptr += 2 * (len + 1);
2963                                         remaining_words -= len + 1;
2964                                         ses->serverOS[2 * len] = 0;
2965                                         ses->serverOS[1 + (2 * len)] = 0;
2966                                         if (remaining_words > 0) {
2967                                                 len = UniStrnlen((wchar_t *)
2968                                                                  bcc_ptr,
2969                                                                  remaining_words
2970                                                                  - 1);
2971                                                 kfree(ses->serverNOS);
2972                                                 ses->serverNOS =
2973                                                     kzalloc(2 * (len + 1),
2974                                                             GFP_KERNEL);
2975                                                 cifs_strfromUCS_le(ses->
2976                                                                    serverNOS,
2977                                                                    (__le16 *)
2978                                                                    bcc_ptr,
2979                                                                    len,
2980                                                                    nls_codepage);
2981                                                 bcc_ptr += 2 * (len + 1);
2982                                                 ses->serverNOS[2 * len] = 0;
2983                                                 ses->serverNOS[1 +
2984                                                                (2 * len)] = 0;
2985                                                 remaining_words -= len + 1;
2986                                                 if (remaining_words > 0) {
2987                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
2988                                 /* last string not always null terminated
2989                                    (for e.g. for Windows XP & 2000) */
2990                                                         kfree(ses->serverDomain);
2991                                                         ses->serverDomain =
2992                                                             kzalloc(2 *
2993                                                                     (len +
2994                                                                      1),
2995                                                                     GFP_KERNEL);
2996                                                         cifs_strfromUCS_le
2997                                                             (ses->serverDomain,
2998                                                              (__le16 *)bcc_ptr,
2999                                                              len, nls_codepage);
3000                                                         bcc_ptr +=
3001                                                             2 * (len + 1);
3002                                                         ses->serverDomain[2*len]
3003                                                             = 0;
3004                                                         ses->serverDomain
3005                                                                 [1 + (2 * len)]
3006                                                             = 0;
3007                                                 } /* else no more room so create dummy domain string */
3008                                                 else {
3009                                                         kfree(ses->serverDomain);
3010                                                         ses->serverDomain =
3011                                                             kzalloc(2,
3012                                                                     GFP_KERNEL);
3013                                                 }
3014                                         } else {        /* no room so create dummy domain and NOS string */
3015                                                 kfree(ses->serverDomain);
3016                                                 ses->serverDomain =
3017                                                     kzalloc(2, GFP_KERNEL);
3018                                                 kfree(ses->serverNOS);
3019                                                 ses->serverNOS =
3020                                                     kzalloc(2, GFP_KERNEL);
3021                                         }
3022                                 } else {        /* ASCII */
3023                                         len = strnlen(bcc_ptr, 1024);
3024                                         if (((long) bcc_ptr + len) - (long)
3025                                             pByteArea(smb_buffer_response)
3026                                             <= BCC(smb_buffer_response)) {
3027                                                 if (ses->serverOS)
3028                                                         kfree(ses->serverOS);
3029                                                 ses->serverOS =
3030                                                     kzalloc(len + 1,
3031                                                             GFP_KERNEL);
3032                                                 strncpy(ses->serverOS,
3033                                                         bcc_ptr, len);
3034
3035                                                 bcc_ptr += len;
3036                                                 bcc_ptr[0] = 0; /* null terminate string */
3037                                                 bcc_ptr++;
3038
3039                                                 len = strnlen(bcc_ptr, 1024);
3040                                                 kfree(ses->serverNOS);
3041                                                 ses->serverNOS =
3042                                                     kzalloc(len + 1,
3043                                                             GFP_KERNEL);
3044                                                 strncpy(ses->serverNOS, bcc_ptr, len);
3045                                                 bcc_ptr += len;
3046                                                 bcc_ptr[0] = 0;
3047                                                 bcc_ptr++;
3048
3049                                                 len = strnlen(bcc_ptr, 1024);
3050                                                 kfree(ses->serverDomain);
3051                                                 ses->serverDomain =
3052                                                     kzalloc(len + 1,
3053                                                             GFP_KERNEL);
3054                                                 strncpy(ses->serverDomain,
3055                                                         bcc_ptr, len);
3056                                                 bcc_ptr += len;
3057                                                 bcc_ptr[0] = 0;
3058                                                 bcc_ptr++;
3059                                         } else
3060                                                 cFYI(1,
3061                                                      ("field of length %d "
3062                                                     "extends beyond end of smb",
3063                                                       len));
3064                                 }
3065                         } else {
3066                                 cERROR(1, ("Security Blob Length extends beyond"
3067                                            " end of SMB"));
3068                         }
3069                 } else {
3070                         cERROR(1, ("No session structure passed in."));
3071                 }
3072         } else {
3073                 cERROR(1, ("Invalid Word count %d:",
3074                         smb_buffer_response->WordCount));
3075                 rc = -EIO;
3076         }
3077
3078         cifs_buf_release(smb_buffer);
3079
3080         return rc;
3081 }
3082 static int
3083 CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
3084                         char *ntlm_session_key, bool ntlmv2_flag,
3085                         const struct nls_table *nls_codepage)
3086 {
3087         struct smb_hdr *smb_buffer;
3088         struct smb_hdr *smb_buffer_response;
3089         SESSION_SETUP_ANDX *pSMB;
3090         SESSION_SETUP_ANDX *pSMBr;
3091         char *bcc_ptr;
3092         char *user;
3093         char *domain;
3094         int rc = 0;
3095         int remaining_words = 0;
3096         int bytes_returned = 0;
3097         int len;
3098         int SecurityBlobLength = sizeof(AUTHENTICATE_MESSAGE);
3099         PAUTHENTICATE_MESSAGE SecurityBlob;
3100         __u32 negotiate_flags, capabilities;
3101         __u16 count;
3102
3103         cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
3104         if (ses == NULL)
3105                 return -EINVAL;
3106         user = ses->userName;
3107         domain = ses->domainName;
3108         smb_buffer = cifs_buf_get();
3109         if (smb_buffer == NULL) {
3110                 return -ENOMEM;
3111         }
3112         smb_buffer_response = smb_buffer;
3113         pSMB = (SESSION_SETUP_ANDX *)smb_buffer;
3114         pSMBr = (SESSION_SETUP_ANDX *)smb_buffer_response;
3115
3116         /* send SMBsessionSetup here */
3117         header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
3118                         NULL /* no tCon exists yet */ , 12 /* wct */ );
3119
3120         smb_buffer->Mid = GetNextMid(ses->server);
3121         pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
3122         pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
3123         pSMB->req.AndXCommand = 0xFF;
3124         pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
3125         pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
3126
3127         pSMB->req.hdr.Uid = ses->Suid;
3128
3129         if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3130                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3131
3132         capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
3133                         CAP_EXTENDED_SECURITY;
3134         if (ses->capabilities & CAP_UNICODE) {
3135                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3136                 capabilities |= CAP_UNICODE;
3137         }
3138         if (ses->capabilities & CAP_STATUS32) {
3139                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3140                 capabilities |= CAP_STATUS32;
3141         }
3142         if (ses->capabilities & CAP_DFS) {
3143                 smb_buffer->Flags2 |= SMBFLG2_DFS;
3144                 capabilities |= CAP_DFS;
3145         }
3146         pSMB->req.Capabilities = cpu_to_le32(capabilities);
3147
3148         bcc_ptr = (char *)&pSMB->req.SecurityBlob;
3149         SecurityBlob = (PAUTHENTICATE_MESSAGE)bcc_ptr;
3150         strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
3151         SecurityBlob->MessageType = NtLmAuthenticate;
3152         bcc_ptr += SecurityBlobLength;
3153         negotiate_flags = NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
3154                         NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
3155                         0x80000000 | NTLMSSP_NEGOTIATE_128;
3156         if (sign_CIFS_PDUs)
3157                 negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
3158         if (ntlmv2_flag)
3159                 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
3160
3161 /* setup pointers to domain name and workstation name */
3162
3163         SecurityBlob->WorkstationName.Buffer = 0;
3164         SecurityBlob->WorkstationName.Length = 0;
3165         SecurityBlob->WorkstationName.MaximumLength = 0;
3166         SecurityBlob->SessionKey.Length = 0;
3167         SecurityBlob->SessionKey.MaximumLength = 0;
3168         SecurityBlob->SessionKey.Buffer = 0;
3169
3170         SecurityBlob->LmChallengeResponse.Length = 0;
3171         SecurityBlob->LmChallengeResponse.MaximumLength = 0;
3172         SecurityBlob->LmChallengeResponse.Buffer = 0;
3173
3174         SecurityBlob->NtChallengeResponse.Length =
3175             cpu_to_le16(CIFS_SESS_KEY_SIZE);
3176         SecurityBlob->NtChallengeResponse.MaximumLength =
3177             cpu_to_le16(CIFS_SESS_KEY_SIZE);
3178         memcpy(bcc_ptr, ntlm_session_key, CIFS_SESS_KEY_SIZE);
3179         SecurityBlob->NtChallengeResponse.Buffer =
3180             cpu_to_le32(SecurityBlobLength);
3181         SecurityBlobLength += CIFS_SESS_KEY_SIZE;
3182         bcc_ptr += CIFS_SESS_KEY_SIZE;
3183
3184         if (ses->capabilities & CAP_UNICODE) {
3185                 if (domain == NULL) {
3186                         SecurityBlob->DomainName.Buffer = 0;
3187                         SecurityBlob->DomainName.Length = 0;
3188                         SecurityBlob->DomainName.MaximumLength = 0;
3189                 } else {
3190                         __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
3191                                           nls_codepage);
3192                         ln *= 2;
3193                         SecurityBlob->DomainName.MaximumLength =
3194                             cpu_to_le16(ln);
3195                         SecurityBlob->DomainName.Buffer =
3196                             cpu_to_le32(SecurityBlobLength);
3197                         bcc_ptr += ln;
3198                         SecurityBlobLength += ln;
3199                         SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3200                 }
3201                 if (user == NULL) {
3202                         SecurityBlob->UserName.Buffer = 0;
3203                         SecurityBlob->UserName.Length = 0;
3204                         SecurityBlob->UserName.MaximumLength = 0;
3205                 } else {
3206                         __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
3207                                           nls_codepage);
3208                         ln *= 2;
3209                         SecurityBlob->UserName.MaximumLength =
3210                             cpu_to_le16(ln);
3211                         SecurityBlob->UserName.Buffer =
3212                             cpu_to_le32(SecurityBlobLength);
3213                         bcc_ptr += ln;
3214                         SecurityBlobLength += ln;
3215                         SecurityBlob->UserName.Length = cpu_to_le16(ln);
3216                 }
3217
3218                 /* SecurityBlob->WorkstationName.Length =
3219                  cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
3220                    SecurityBlob->WorkstationName.Length *= 2;
3221                    SecurityBlob->WorkstationName.MaximumLength =
3222                         cpu_to_le16(SecurityBlob->WorkstationName.Length);
3223                    SecurityBlob->WorkstationName.Buffer =
3224                                  cpu_to_le32(SecurityBlobLength);
3225                    bcc_ptr += SecurityBlob->WorkstationName.Length;
3226                    SecurityBlobLength += SecurityBlob->WorkstationName.Length;
3227                    SecurityBlob->WorkstationName.Length =
3228                         cpu_to_le16(SecurityBlob->WorkstationName.Length);  */
3229
3230                 if ((long) bcc_ptr % 2) {
3231                         *bcc_ptr = 0;
3232                         bcc_ptr++;
3233                 }
3234                 bytes_returned =
3235                     cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
3236                                   32, nls_codepage);
3237                 bcc_ptr += 2 * bytes_returned;
3238                 bytes_returned =
3239                     cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
3240                                   nls_codepage);
3241                 bcc_ptr += 2 * bytes_returned;
3242                 bcc_ptr += 2;   /* null term version string */
3243                 bytes_returned =
3244                     cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
3245                                   64, nls_codepage);
3246                 bcc_ptr += 2 * bytes_returned;
3247                 *(bcc_ptr + 1) = 0;
3248                 *(bcc_ptr + 2) = 0;
3249                 bcc_ptr += 2;   /* null terminate network opsys string */
3250                 *(bcc_ptr + 1) = 0;
3251                 *(bcc_ptr + 2) = 0;
3252                 bcc_ptr += 2;   /* null domain */
3253         } else {                /* ASCII */
3254                 if (domain == NULL) {
3255                         SecurityBlob->DomainName.Buffer = 0;
3256                         SecurityBlob->DomainName.Length = 0;
3257                         SecurityBlob->DomainName.MaximumLength = 0;
3258                 } else {
3259                         __u16 ln;
3260                         negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
3261                         strncpy(bcc_ptr, domain, 63);
3262                         ln = strnlen(domain, 64);
3263                         SecurityBlob->DomainName.MaximumLength =
3264                             cpu_to_le16(ln);
3265                         SecurityBlob->DomainName.Buffer =
3266                             cpu_to_le32(SecurityBlobLength);
3267                         bcc_ptr += ln;
3268                         SecurityBlobLength += ln;
3269                         SecurityBlob->DomainName.Length = cpu_to_le16(ln);
3270                 }
3271                 if (user == NULL) {
3272                         SecurityBlob->UserName.Buffer = 0;
3273                         SecurityBlob->UserName.Length = 0;
3274                         SecurityBlob->UserName.MaximumLength = 0;
3275                 } else {
3276                         __u16 ln;
3277                         strncpy(bcc_ptr, user, 63);
3278                         ln = strnlen(user, 64);
3279                         SecurityBlob->UserName.MaximumLength = cpu_to_le16(ln);
3280                         SecurityBlob->UserName.Buffer =
3281                                                 cpu_to_le32(SecurityBlobLength);
3282                         bcc_ptr += ln;
3283                         SecurityBlobLength += ln;
3284                         SecurityBlob->UserName.Length = cpu_to_le16(ln);
3285                 }
3286                 /* BB fill in our workstation name if known BB */
3287
3288                 strcpy(bcc_ptr, "Linux version ");
3289                 bcc_ptr += strlen("Linux version ");
3290                 strcpy(bcc_ptr, utsname()->release);
3291                 bcc_ptr += strlen(utsname()->release) + 1;
3292                 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
3293                 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
3294                 bcc_ptr++;      /* null domain */
3295                 *bcc_ptr = 0;
3296         }
3297         SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
3298         pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
3299         count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
3300         smb_buffer->smb_buf_length += count;
3301         pSMB->req.ByteCount = cpu_to_le16(count);
3302
3303         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
3304                          &bytes_returned, CIFS_LONG_OP);
3305         if (rc) {
3306 /*   rc = map_smb_to_linux_error(smb_buffer_response) done in SendReceive now */
3307         } else if ((smb_buffer_response->WordCount == 3) ||
3308                    (smb_buffer_response->WordCount == 4)) {
3309                 __u16 action = le16_to_cpu(pSMBr->resp.Action);
3310                 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
3311                 if (action & GUEST_LOGIN)
3312                         cFYI(1, ("Guest login")); /* BB Should we set anything
3313                                                          in SesInfo struct ? */
3314 /*              if (SecurityBlob2->MessageType != NtLm??) {
3315                         cFYI("Unexpected message type on auth response is %d"));
3316                 } */
3317
3318                 if (ses) {
3319                         cFYI(1,
3320                              ("Check challenge UID %d vs auth response UID %d",
3321                               ses->Suid, smb_buffer_response->Uid));
3322                         /* UID left in wire format */
3323                         ses->Suid = smb_buffer_response->Uid;
3324                         bcc_ptr = pByteArea(smb_buffer_response);
3325                 /* response can have either 3 or 4 word count - Samba sends 3 */
3326                         if ((pSMBr->resp.hdr.WordCount == 3)
3327                             || ((pSMBr->resp.hdr.WordCount == 4)
3328                                 && (blob_len <
3329                                     pSMBr->resp.ByteCount))) {
3330                                 if (pSMBr->resp.hdr.WordCount == 4) {
3331                                         bcc_ptr +=
3332                                             blob_len;
3333                                         cFYI(1,
3334                                              ("Security Blob Length %d ",
3335                                               blob_len));
3336                                 }
3337
3338                                 cFYI(1,
3339                                      ("NTLMSSP response to Authenticate "));
3340
3341                                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3342                                         if ((long) (bcc_ptr) % 2) {
3343                                                 remaining_words =
3344                                                     (BCC(smb_buffer_response)
3345                                                      - 1) / 2;
3346                                                 bcc_ptr++;      /* Unicode strings must be word aligned */
3347                                         } else {
3348                                                 remaining_words = BCC(smb_buffer_response) / 2;
3349                                         }
3350                                         len = UniStrnlen((wchar_t *) bcc_ptr,
3351                                                         remaining_words - 1);
3352 /* We look for obvious messed up bcc or strings in response so we do not go off
3353   the end since (at least) WIN2K and Windows XP have a major bug in not null
3354   terminating last Unicode string in response  */
3355                                         if (ses->serverOS)
3356                                                 kfree(ses->serverOS);
3357                                         ses->serverOS =
3358                                             kzalloc(2 * (len + 1), GFP_KERNEL);
3359                                         cifs_strfromUCS_le(ses->serverOS,
3360                                                            (__le16 *)
3361                                                            bcc_ptr, len,
3362                                                            nls_codepage);
3363                                         bcc_ptr += 2 * (len + 1);
3364                                         remaining_words -= len + 1;
3365                                         ses->serverOS[2 * len] = 0;
3366                                         ses->serverOS[1 + (2 * len)] = 0;
3367                                         if (remaining_words > 0) {
3368                                                 len = UniStrnlen((wchar_t *)
3369                                                                  bcc_ptr,
3370                                                                  remaining_words
3371                                                                  - 1);
3372                                                 kfree(ses->serverNOS);
3373                                                 ses->serverNOS =
3374                                                     kzalloc(2 * (len + 1),
3375                                                             GFP_KERNEL);
3376                                                 cifs_strfromUCS_le(ses->
3377                                                                    serverNOS,
3378                                                                    (__le16 *)
3379                                                                    bcc_ptr,
3380                                                                    len,
3381                                                                    nls_codepage);
3382                                                 bcc_ptr += 2 * (len + 1);
3383                                                 ses->serverNOS[2 * len] = 0;
3384                                                 ses->serverNOS[1+(2*len)] = 0;
3385                                                 remaining_words -= len + 1;
3386                                                 if (remaining_words > 0) {
3387                                                         len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3388      /* last string not always null terminated (e.g. for Windows XP & 2000) */
3389                                                         if (ses->serverDomain)
3390                                                                 kfree(ses->serverDomain);
3391                                                         ses->serverDomain =
3392                                                             kzalloc(2 *
3393                                                                     (len +
3394                                                                      1),
3395                                                                     GFP_KERNEL);
3396                                                         cifs_strfromUCS_le
3397                                                             (ses->
3398                                                              serverDomain,
3399                                                              (__le16 *)
3400                                                              bcc_ptr, len,
3401                                                              nls_codepage);
3402                                                         bcc_ptr +=
3403                                                             2 * (len + 1);
3404                                                         ses->
3405                                                             serverDomain[2
3406                                                                          * len]
3407                                                             = 0;
3408                                                         ses->
3409                                                             serverDomain[1
3410                                                                          +
3411                                                                          (2
3412                                                                           *
3413                                                                           len)]
3414                                                             = 0;
3415                                                 } /* else no more room so create dummy domain string */
3416                                                 else {
3417                                                         if (ses->serverDomain)
3418                                                                 kfree(ses->serverDomain);
3419                                                         ses->serverDomain = kzalloc(2,GFP_KERNEL);
3420                                                 }
3421                                         } else {  /* no room so create dummy domain and NOS string */
3422                                                 if (ses->serverDomain)
3423                                                         kfree(ses->serverDomain);
3424                                                 ses->serverDomain = kzalloc(2, GFP_KERNEL);
3425                                                 kfree(ses->serverNOS);
3426                                                 ses->serverNOS = kzalloc(2, GFP_KERNEL);
3427                                         }
3428                                 } else {        /* ASCII */
3429                                         len = strnlen(bcc_ptr, 1024);
3430                                         if (((long) bcc_ptr + len) -
3431                                            (long) pByteArea(smb_buffer_response)
3432                                                 <= BCC(smb_buffer_response)) {
3433                                                 if (ses->serverOS)
3434                                                         kfree(ses->serverOS);
3435                                                 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
3436                                                 strncpy(ses->serverOS,bcc_ptr, len);
3437
3438                                                 bcc_ptr += len;
3439                                                 bcc_ptr[0] = 0; /* null terminate the string */
3440                                                 bcc_ptr++;
3441
3442                                                 len = strnlen(bcc_ptr, 1024);
3443                                                 kfree(ses->serverNOS);
3444                                                 ses->serverNOS = kzalloc(len+1,
3445                                                                     GFP_KERNEL);
3446                                                 strncpy(ses->serverNOS,
3447                                                         bcc_ptr, len);
3448                                                 bcc_ptr += len;
3449                                                 bcc_ptr[0] = 0;
3450                                                 bcc_ptr++;
3451
3452                                                 len = strnlen(bcc_ptr, 1024);
3453                                                 if (ses->serverDomain)
3454                                                         kfree(ses->serverDomain);
3455                                                 ses->serverDomain =
3456                                                                 kzalloc(len+1,
3457                                                                     GFP_KERNEL);
3458                                                 strncpy(ses->serverDomain,
3459                                                         bcc_ptr, len);
3460                                                 bcc_ptr += len;
3461                                                 bcc_ptr[0] = 0;
3462                                                 bcc_ptr++;
3463                                         } else
3464                                                 cFYI(1, ("field of length %d "
3465                                                    "extends beyond end of smb ",
3466                                                       len));
3467                                 }
3468                         } else {
3469                                 cERROR(1, ("Security Blob extends beyond end "
3470                                         "of SMB"));
3471                         }
3472                 } else {
3473                         cERROR(1, ("No session structure passed in."));
3474                 }
3475         } else {
3476                 cERROR(1, ("Invalid Word count %d: ",
3477                         smb_buffer_response->WordCount));
3478                 rc = -EIO;
3479         }
3480
3481         cifs_buf_release(smb_buffer);
3482
3483         return rc;
3484 }
3485
3486 int
3487 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
3488          const char *tree, struct cifsTconInfo *tcon,
3489          const struct nls_table *nls_codepage)
3490 {
3491         struct smb_hdr *smb_buffer;
3492         struct smb_hdr *smb_buffer_response;
3493         TCONX_REQ *pSMB;
3494         TCONX_RSP *pSMBr;
3495         unsigned char *bcc_ptr;
3496         int rc = 0;
3497         int length;
3498         __u16 count;
3499
3500         if (ses == NULL)
3501                 return -EIO;
3502
3503         smb_buffer = cifs_buf_get();
3504         if (smb_buffer == NULL) {
3505                 return -ENOMEM;
3506         }
3507         smb_buffer_response = smb_buffer;
3508
3509         header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3510                         NULL /*no tid */ , 4 /*wct */ );
3511
3512         smb_buffer->Mid = GetNextMid(ses->server);
3513         smb_buffer->Uid = ses->Suid;
3514         pSMB = (TCONX_REQ *) smb_buffer;
3515         pSMBr = (TCONX_RSP *) smb_buffer_response;
3516
3517         pSMB->AndXCommand = 0xFF;
3518         pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
3519         bcc_ptr = &pSMB->Password[0];
3520         if ((ses->server->secMode) & SECMODE_USER) {
3521                 pSMB->PasswordLength = cpu_to_le16(1);  /* minimum */
3522                 *bcc_ptr = 0; /* password is null byte */
3523                 bcc_ptr++;              /* skip password */
3524                 /* already aligned so no need to do it below */
3525         } else {
3526                 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
3527                 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3528                    specified as required (when that support is added to
3529                    the vfs in the future) as only NTLM or the much
3530                    weaker LANMAN (which we do not send by default) is accepted
3531                    by Samba (not sure whether other servers allow
3532                    NTLMv2 password here) */
3533 #ifdef CONFIG_CIFS_WEAK_PW_HASH
3534                 if ((extended_security & CIFSSEC_MAY_LANMAN) &&
3535                         (ses->server->secType == LANMAN))
3536                         calc_lanman_hash(ses->password, ses->server->cryptKey,
3537                                          ses->server->secMode &
3538                                             SECMODE_PW_ENCRYPT ? true : false,
3539                                          bcc_ptr);
3540                 else
3541 #endif /* CIFS_WEAK_PW_HASH */
3542                 SMBNTencrypt(ses->password,
3543                              ses->server->cryptKey,
3544                              bcc_ptr);
3545
3546                 bcc_ptr += CIFS_SESS_KEY_SIZE;
3547                 if (ses->capabilities & CAP_UNICODE) {
3548                         /* must align unicode strings */
3549                         *bcc_ptr = 0; /* null byte password */
3550                         bcc_ptr++;
3551                 }
3552         }
3553
3554         if (ses->server->secMode &
3555                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
3556                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3557
3558         if (ses->capabilities & CAP_STATUS32) {
3559                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3560         }
3561         if (ses->capabilities & CAP_DFS) {
3562                 smb_buffer->Flags2 |= SMBFLG2_DFS;
3563         }
3564         if (ses->capabilities & CAP_UNICODE) {
3565                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3566                 length =
3567                     cifs_strtoUCS((__le16 *) bcc_ptr, tree,
3568                         6 /* max utf8 char length in bytes */ *
3569                         (/* server len*/ + 256 /* share len */), nls_codepage);
3570                 bcc_ptr += 2 * length;  /* convert num 16 bit words to bytes */
3571                 bcc_ptr += 2;   /* skip trailing null */
3572         } else {                /* ASCII */
3573                 strcpy(bcc_ptr, tree);
3574                 bcc_ptr += strlen(tree) + 1;
3575         }
3576         strcpy(bcc_ptr, "?????");
3577         bcc_ptr += strlen("?????");
3578         bcc_ptr += 1;
3579         count = bcc_ptr - &pSMB->Password[0];
3580         pSMB->hdr.smb_buf_length += count;
3581         pSMB->ByteCount = cpu_to_le16(count);
3582
3583         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
3584                          CIFS_STD_OP);
3585
3586         /* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
3587         /* above now done in SendReceive */
3588         if ((rc == 0) && (tcon != NULL)) {
3589                 tcon->tidStatus = CifsGood;
3590                 tcon->need_reconnect = false;
3591                 tcon->tid = smb_buffer_response->Tid;
3592                 bcc_ptr = pByteArea(smb_buffer_response);
3593                 length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
3594                 /* skip service field (NB: this field is always ASCII) */
3595                 if (length == 3) {
3596                         if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3597                             (bcc_ptr[2] == 'C')) {
3598                                 cFYI(1, ("IPC connection"));
3599                                 tcon->ipc = 1;
3600                         }
3601                 } else if (length == 2) {
3602                         if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3603                                 /* the most common case */
3604                                 cFYI(1, ("disk share connection"));
3605                         }
3606                 }
3607                 bcc_ptr += length + 1;
3608                 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3609                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3610                         length = UniStrnlen((wchar_t *) bcc_ptr, 512);
3611                         if ((bcc_ptr + (2 * length)) -
3612                              pByteArea(smb_buffer_response) <=
3613                             BCC(smb_buffer_response)) {
3614                                 kfree(tcon->nativeFileSystem);
3615                                 tcon->nativeFileSystem =
3616                                     kzalloc(length + 2, GFP_KERNEL);
3617                                 if (tcon->nativeFileSystem)
3618                                         cifs_strfromUCS_le(
3619                                                 tcon->nativeFileSystem,
3620                                                 (__le16 *) bcc_ptr,
3621                                                 length, nls_codepage);
3622                                 bcc_ptr += 2 * length;
3623                                 bcc_ptr[0] = 0; /* null terminate the string */
3624                                 bcc_ptr[1] = 0;
3625                                 bcc_ptr += 2;
3626                         }
3627                         /* else do not bother copying these information fields*/
3628                 } else {
3629                         length = strnlen(bcc_ptr, 1024);
3630                         if ((bcc_ptr + length) -
3631                             pByteArea(smb_buffer_response) <=
3632                             BCC(smb_buffer_response)) {
3633                                 kfree(tcon->nativeFileSystem);
3634                                 tcon->nativeFileSystem =
3635                                     kzalloc(length + 1, GFP_KERNEL);
3636                                 if (tcon->nativeFileSystem)
3637                                         strncpy(tcon->nativeFileSystem, bcc_ptr,
3638                                                 length);
3639                         }
3640                         /* else do not bother copying these information fields*/
3641                 }
3642                 if ((smb_buffer_response->WordCount == 3) ||
3643                          (smb_buffer_response->WordCount == 7))
3644                         /* field is in same location */
3645                         tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3646                 else
3647                         tcon->Flags = 0;
3648                 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
3649         } else if ((rc == 0) && tcon == NULL) {
3650                 /* all we need to save for IPC$ connection */
3651                 ses->ipc_tid = smb_buffer_response->Tid;
3652         }
3653
3654         cifs_buf_release(smb_buffer);
3655         return rc;
3656 }
3657
3658 int
3659 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3660 {
3661         int rc = 0;
3662         char *tmp;
3663
3664         if (cifs_sb->tcon)
3665                 cifs_put_tcon(cifs_sb->tcon);
3666
3667         cifs_sb->tcon = NULL;
3668         tmp = cifs_sb->prepath;
3669         cifs_sb->prepathlen = 0;
3670         cifs_sb->prepath = NULL;
3671         kfree(tmp);
3672
3673         return rc;
3674 }
3675
3676 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
3677                                            struct nls_table *nls_info)
3678 {
3679         int rc = 0;
3680         char ntlm_session_key[CIFS_SESS_KEY_SIZE];
3681         bool ntlmv2_flag = false;
3682         int first_time = 0;
3683         struct TCP_Server_Info *server = pSesInfo->server;
3684
3685         /* what if server changes its buffer size after dropping the session? */
3686         if (server->maxBuf == 0) /* no need to send on reconnect */ {
3687                 rc = CIFSSMBNegotiate(xid, pSesInfo);
3688                 if (rc == -EAGAIN) {
3689                         /* retry only once on 1st time connection */
3690                         rc = CIFSSMBNegotiate(xid, pSesInfo);
3691                         if (rc == -EAGAIN)
3692                                 rc = -EHOSTDOWN;
3693                 }
3694                 if (rc == 0) {
3695                         spin_lock(&GlobalMid_Lock);
3696                         if (server->tcpStatus != CifsExiting)
3697                                 server->tcpStatus = CifsGood;
3698                         else
3699                                 rc = -EHOSTDOWN;
3700                         spin_unlock(&GlobalMid_Lock);
3701
3702                 }
3703                 first_time = 1;
3704         }
3705
3706         if (rc)
3707                 goto ss_err_exit;
3708
3709         pSesInfo->flags = 0;
3710         pSesInfo->capabilities = server->capabilities;
3711         if (linuxExtEnabled == 0)
3712                 pSesInfo->capabilities &= (~CAP_UNIX);
3713         /*      pSesInfo->sequence_number = 0;*/
3714         cFYI(1, ("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
3715                  server->secMode, server->capabilities, server->timeAdj));
3716
3717         if (experimEnabled < 2)
3718                 rc = CIFS_SessSetup(xid, pSesInfo, first_time, nls_info);
3719         else if (extended_security
3720                         && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3721                         && (server->secType == NTLMSSP)) {
3722                 rc = -EOPNOTSUPP;
3723         } else if (extended_security
3724                         && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
3725                         && (server->secType == RawNTLMSSP)) {
3726                 cFYI(1, ("NTLMSSP sesssetup"));
3727                 rc = CIFSNTLMSSPNegotiateSessSetup(xid, pSesInfo, &ntlmv2_flag,
3728                                                    nls_info);
3729                 if (!rc) {
3730                         if (ntlmv2_flag) {
3731                                 char *v2_response;
3732                                 cFYI(1, ("more secure NTLM ver2 hash"));
3733                                 if (CalcNTLMv2_partial_mac_key(pSesInfo,
3734                                                                 nls_info)) {
3735                                         rc = -ENOMEM;
3736                                         goto ss_err_exit;
3737                                 } else
3738                                         v2_response = kmalloc(16 + 64 /* blob*/,
3739                                                                 GFP_KERNEL);
3740                                 if (v2_response) {
3741                                         CalcNTLMv2_response(pSesInfo,
3742                                                                 v2_response);
3743                                 /*      if (first_time)
3744                                                 cifs_calculate_ntlmv2_mac_key */
3745                                         kfree(v2_response);
3746                                         /* BB Put dummy sig in SessSetup PDU? */
3747                                 } else {
3748                                         rc = -ENOMEM;
3749                                         goto ss_err_exit;
3750                                 }
3751
3752                         } else {
3753                                 SMBNTencrypt(pSesInfo->password,
3754                                              server->cryptKey,
3755                                              ntlm_session_key);
3756
3757                                 if (first_time)
3758                                         cifs_calculate_mac_key(
3759                                              &server->mac_signing_key,
3760                                              ntlm_session_key,
3761                                              pSesInfo->password);
3762                         }
3763                         /* for better security the weaker lanman hash not sent
3764                            in AuthSessSetup so we no longer calculate it */
3765
3766                         rc = CIFSNTLMSSPAuthSessSetup(xid, pSesInfo,
3767                                                       ntlm_session_key,
3768                                                       ntlmv2_flag,
3769                                                       nls_info);
3770                 }
3771         } else { /* old style NTLM 0.12 session setup */
3772                 SMBNTencrypt(pSesInfo->password, server->cryptKey,
3773                              ntlm_session_key);
3774
3775                 if (first_time)
3776                         cifs_calculate_mac_key(&server->mac_signing_key,
3777                                                 ntlm_session_key,
3778                                                 pSesInfo->password);
3779
3780                 rc = CIFSSessSetup(xid, pSesInfo, ntlm_session_key, nls_info);
3781         }
3782         if (rc) {
3783                 cERROR(1, ("Send error in SessSetup = %d", rc));
3784         } else {
3785                 cFYI(1, ("CIFS Session Established successfully"));
3786                         spin_lock(&GlobalMid_Lock);
3787                         pSesInfo->status = CifsGood;
3788                         pSesInfo->need_reconnect = false;
3789                         spin_unlock(&GlobalMid_Lock);
3790         }
3791
3792 ss_err_exit:
3793         return rc;
3794 }
3795