fs/cifs/connect.c

   1 /*
   2  *   fs/cifs/connect.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2009
   5  *   Author(s): Steve French (sfrench@us.ibm.com)
   6  *
   7  *   This library is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU Lesser General Public License as published
   9  *   by the Free Software Foundation; either version 2.1 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This library is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  15  *   the GNU Lesser General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU Lesser General Public License
  18  *   along with this library; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21 #include <linux/fs.h>
  22 #include <linux/net.h>
  23 #include <linux/string.h>
  24 #include <linux/list.h>
  25 #include <linux/wait.h>
  26 #include <linux/pagemap.h>
  27 #include <linux/ctype.h>
  28 #include <linux/utsname.h>
  29 #include <linux/mempool.h>
  30 #include <linux/delay.h>
  31 #include <linux/completion.h>
  32 #include <linux/kthread.h>
  33 #include <linux/pagevec.h>
  34 #include <linux/freezer.h>
  35 #include <linux/namei.h>
  36 #include <asm/uaccess.h>
  37 #include <asm/processor.h>
  38 #include <linux/inet.h>
  39 #include <net/ipv6.h>
  40 #include "cifspdu.h"
  41 #include "cifsglob.h"
  42 #include "cifsproto.h"
  43 #include "cifs_unicode.h"
  44 #include "cifs_debug.h"
  45 #include "cifs_fs_sb.h"
  46 #include "ntlmssp.h"
  47 #include "nterr.h"
  48 #include "rfc1002pdu.h"
  49 #include "cn_cifs.h"
  50
  51 #define CIFS_PORT 445
  52 #define RFC1001_PORT 139
  53
  54 extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
  55                          unsigned char *p24);
  56
  57 extern mempool_t *cifs_req_poolp;
  58
  59 struct smb_vol {
  60         char *username;
  61         char *password;
  62         char *domainname;
  63         char *UNC;
  64         char *UNCip;
  65         char *iocharset;  /* local code page for mapping to and from Unicode */
  66         char source_rfc1001_name[16]; /* netbios name of client */
  67         char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
  68         uid_t linux_uid;
  69         gid_t linux_gid;
  70         mode_t file_mode;
  71         mode_t dir_mode;
  72         unsigned secFlg;
  73         bool retry:1;
  74         bool intr:1;
  75         bool setuids:1;
  76         bool override_uid:1;
  77         bool override_gid:1;
  78         bool dynperm:1;
  79         bool noperm:1;
  80         bool no_psx_acl:1; /* set if posix acl support should be disabled */
  81         bool cifs_acl:1;
  82         bool no_xattr:1;   /* set if xattr (EA) support should be disabled*/
  83         bool server_ino:1; /* use inode numbers from server ie UniqueId */
  84         bool direct_io:1;
  85         bool remap:1;      /* set to remap seven reserved chars in filenames */
  86         bool posix_paths:1; /* unset to not ask for posix pathnames. */
  87         bool no_linux_ext:1;
  88         bool sfu_emul:1;
  89         bool nullauth:1;   /* attempt to authenticate with null user */
  90         bool nocase:1;     /* request case insensitive filenames */
  91         bool nobrl:1;      /* disable sending byte range locks to srv */
  92         bool mand_lock:1;  /* send mandatory not posix byte range lock reqs */
  93         bool seal:1;       /* request transport encryption on share */
  94         bool nodfs:1;      /* Do not request DFS, even if available */
  95         bool local_lease:1; /* check leases only on local system, not remote */
  96         bool noblocksnd:1;
  97         bool noautotune:1;
  98         bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
  99         unsigned int rsize;
 100         unsigned int wsize;
 101         unsigned int sockopt;
 102         unsigned short int port;
 103         char *prepath;
 104 };
 105
 106 static int ipv4_connect(struct TCP_Server_Info *server);
 107 static int ipv6_connect(struct TCP_Server_Info *server);
 108
 109 /*
 110  * cifs tcp session reconnection
 111  *
 112  * mark tcp session as reconnecting so temporarily locked
 113  * mark all smb sessions as reconnecting for tcp session
 114  * reconnect tcp session
 115  * wake up waiters on reconnection? - (not needed currently)
 116  */
 117 static int
 118 cifs_reconnect(struct TCP_Server_Info *server)
 119 {
 120         int rc = 0;
 121         struct list_head *tmp, *tmp2;
 122         struct cifsSesInfo *ses;
 123         struct cifsTconInfo *tcon;
 124         struct mid_q_entry *mid_entry;
 125
 126         spin_lock(&GlobalMid_Lock);
 127         if (server->tcpStatus == CifsExiting) {
 128                 /* the demux thread will exit normally
 129                 next time through the loop */
 130                 spin_unlock(&GlobalMid_Lock);
 131                 return rc;
 132         } else
 133                 server->tcpStatus = CifsNeedReconnect;
 134         spin_unlock(&GlobalMid_Lock);
 135         server->maxBuf = 0;
 136
 137         cFYI(1, ("Reconnecting tcp session"));
 138
 139         /* before reconnecting the tcp session, mark the smb session (uid)
 140                 and the tid bad so they are not used until reconnected */
 141         read_lock(&cifs_tcp_ses_lock);
 142         list_for_each(tmp, &server->smb_ses_list) {
 143                 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
 144                 ses->need_reconnect = true;
 145                 ses->ipc_tid = 0;
 146                 list_for_each(tmp2, &ses->tcon_list) {
 147                         tcon = list_entry(tmp2, struct cifsTconInfo, tcon_list);
 148                         tcon->need_reconnect = true;
 149                 }
 150         }
 151         read_unlock(&cifs_tcp_ses_lock);
 152         /* do not want to be sending data on a socket we are freeing */
 153         mutex_lock(&server->srv_mutex);
 154         if (server->ssocket) {
 155                 cFYI(1, ("State: 0x%x Flags: 0x%lx", server->ssocket->state,
 156                         server->ssocket->flags));
 157                 kernel_sock_shutdown(server->ssocket, SHUT_WR);
 158                 cFYI(1, ("Post shutdown state: 0x%x Flags: 0x%lx",
 159                         server->ssocket->state,
 160                         server->ssocket->flags));
 161                 sock_release(server->ssocket);
 162                 server->ssocket = NULL;
 163         }
 164
 165         spin_lock(&GlobalMid_Lock);
 166         list_for_each(tmp, &server->pending_mid_q) {
 167                 mid_entry = list_entry(tmp, struct
 168                                         mid_q_entry,
 169                                         qhead);
 170                 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
 171                                 /* Mark other intransit requests as needing
 172                                    retry so we do not immediately mark the
 173                                    session bad again (ie after we reconnect
 174                                    below) as they timeout too */
 175                         mid_entry->midState = MID_RETRY_NEEDED;
 176                 }
 177         }
 178         spin_unlock(&GlobalMid_Lock);
 179         mutex_unlock(&server->srv_mutex);
 180
 181         while ((server->tcpStatus != CifsExiting) &&
 182                (server->tcpStatus != CifsGood)) {
 183                 try_to_freeze();
 184                 if (server->addr.sockAddr6.sin6_family == AF_INET6)
 185                         rc = ipv6_connect(server);
 186                 else
 187                         rc = ipv4_connect(server);
 188                 if (rc) {
 189                         cFYI(1, ("reconnect error %d", rc));
 190                         msleep(3000);
 191                 } else {
 192                         atomic_inc(&tcpSesReconnectCount);
 193                         spin_lock(&GlobalMid_Lock);
 194                         if (server->tcpStatus != CifsExiting)
 195                                 server->tcpStatus = CifsGood;
 196                         server->sequence_number = 0;
 197                         spin_unlock(&GlobalMid_Lock);
 198         /*              atomic_set(&server->inFlight,0);*/
 199                         wake_up(&server->response_q);
 200                 }
 201         }
 202         return rc;
 203 }
 204
 205 /*
 206         return codes:
 207                 0       not a transact2, or all data present
 208                 >0      transact2 with that much data missing
 209                 -EINVAL = invalid transact2
 210
 211  */
 212 static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
 213 {
 214         struct smb_t2_rsp *pSMBt;
 215         int total_data_size;
 216         int data_in_this_rsp;
 217         int remaining;
 218
 219         if (pSMB->Command != SMB_COM_TRANSACTION2)
 220                 return 0;
 221
 222         /* check for plausible wct, bcc and t2 data and parm sizes */
 223         /* check for parm and data offset going beyond end of smb */
 224         if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
 225                 cFYI(1, ("invalid transact2 word count"));
 226                 return -EINVAL;
 227         }
 228
 229         pSMBt = (struct smb_t2_rsp *)pSMB;
 230
 231         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 232         data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 233
 234         remaining = total_data_size - data_in_this_rsp;
 235
 236         if (remaining == 0)
 237                 return 0;
 238         else if (remaining < 0) {
 239                 cFYI(1, ("total data %d smaller than data in frame %d",
 240                         total_data_size, data_in_this_rsp));
 241                 return -EINVAL;
 242         } else {
 243                 cFYI(1, ("missing %d bytes from transact2, check next response",
 244                         remaining));
 245                 if (total_data_size > maxBufSize) {
 246                         cERROR(1, ("TotalDataSize %d is over maximum buffer %d",
 247                                 total_data_size, maxBufSize));
 248                         return -EINVAL;
 249                 }
 250                 return remaining;
 251         }
 252 }
 253
 254 static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
 255 {
 256         struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
 257         struct smb_t2_rsp *pSMBt  = (struct smb_t2_rsp *)pTargetSMB;
 258         int total_data_size;
 259         int total_in_buf;
 260         int remaining;
 261         int total_in_buf2;
 262         char *data_area_of_target;
 263         char *data_area_of_buf2;
 264         __u16 byte_count;
 265
 266         total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
 267
 268         if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
 269                 cFYI(1, ("total data size of primary and secondary t2 differ"));
 270         }
 271
 272         total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
 273
 274         remaining = total_data_size - total_in_buf;
 275
 276         if (remaining < 0)
 277                 return -EINVAL;
 278
 279         if (remaining == 0) /* nothing to do, ignore */
 280                 return 0;
 281
 282         total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
 283         if (remaining < total_in_buf2) {
 284                 cFYI(1, ("transact2 2nd response contains too much data"));
 285         }
 286
 287         /* find end of first SMB data area */
 288         data_area_of_target = (char *)&pSMBt->hdr.Protocol +
 289                                 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
 290         /* validate target area */
 291
 292         data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
 293                                         le16_to_cpu(pSMB2->t2_rsp.DataOffset);
 294
 295         data_area_of_target += total_in_buf;
 296
 297         /* copy second buffer into end of first buffer */
 298         memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2);
 299         total_in_buf += total_in_buf2;
 300         pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
 301         byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
 302         byte_count += total_in_buf2;
 303         BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
 304
 305         byte_count = pTargetSMB->smb_buf_length;
 306         byte_count += total_in_buf2;
 307
 308         /* BB also add check that we are not beyond maximum buffer size */
 309
 310         pTargetSMB->smb_buf_length = byte_count;
 311
 312         if (remaining == total_in_buf2) {
 313                 cFYI(1, ("found the last secondary response"));
 314                 return 0; /* we are done */
 315         } else /* more responses to go */
 316                 return 1;
 317
 318 }
 319
 320 static int
 321 cifs_demultiplex_thread(struct TCP_Server_Info *server)
 322 {
 323         int length;
 324         unsigned int pdu_length, total_read;
 325         struct smb_hdr *smb_buffer = NULL;
 326         struct smb_hdr *bigbuf = NULL;
 327         struct smb_hdr *smallbuf = NULL;
 328         struct msghdr smb_msg;
 329         struct kvec iov;
 330         struct socket *csocket = server->ssocket;
 331         struct list_head *tmp;
 332         struct cifsSesInfo *ses;
 333         struct task_struct *task_to_wake = NULL;
 334         struct mid_q_entry *mid_entry;
 335         char temp;
 336         bool isLargeBuf = false;
 337         bool isMultiRsp;
 338         int reconnect;
 339
 340         current->flags |= PF_MEMALLOC;
 341         cFYI(1, ("Demultiplex PID: %d", task_pid_nr(current)));
 342
 343         length = atomic_inc_return(&tcpSesAllocCount);
 344         if (length > 1)
 345                 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
 346                                 GFP_KERNEL);
 347
 348         set_freezable();
 349         while (server->tcpStatus != CifsExiting) {
 350                 if (try_to_freeze())
 351                         continue;
 352                 if (bigbuf == NULL) {
 353                         bigbuf = cifs_buf_get();
 354                         if (!bigbuf) {
 355                                 cERROR(1, ("No memory for large SMB response"));
 356                                 msleep(3000);
 357                                 /* retry will check if exiting */
 358                                 continue;
 359                         }
 360                 } else if (isLargeBuf) {
 361                         /* we are reusing a dirty large buf, clear its start */
 362                         memset(bigbuf, 0, sizeof(struct smb_hdr));
 363                 }
 364
 365                 if (smallbuf == NULL) {
 366                         smallbuf = cifs_small_buf_get();
 367                         if (!smallbuf) {
 368                                 cERROR(1, ("No memory for SMB response"));
 369                                 msleep(1000);
 370                                 /* retry will check if exiting */
 371                                 continue;
 372                         }
 373                         /* beginning of smb buffer is cleared in our buf_get */
 374                 } else /* if existing small buf clear beginning */
 375                         memset(smallbuf, 0, sizeof(struct smb_hdr));
 376
 377                 isLargeBuf = false;
 378                 isMultiRsp = false;
 379                 smb_buffer = smallbuf;
 380                 iov.iov_base = smb_buffer;
 381                 iov.iov_len = 4;
 382                 smb_msg.msg_control = NULL;
 383                 smb_msg.msg_controllen = 0;
 384                 pdu_length = 4; /* enough to get RFC1001 header */
 385 incomplete_rcv:
 386                 length =
 387                     kernel_recvmsg(csocket, &smb_msg,
 388                                 &iov, 1, pdu_length, 0 /* BB other flags? */);
 389
 390                 if (server->tcpStatus == CifsExiting) {
 391                         break;
 392                 } else if (server->tcpStatus == CifsNeedReconnect) {
 393                         cFYI(1, ("Reconnect after server stopped responding"));
 394                         cifs_reconnect(server);
 395                         cFYI(1, ("call to reconnect done"));
 396                         csocket = server->ssocket;
 397                         continue;
 398                 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
 399                         msleep(1); /* minimum sleep to prevent looping
 400                                 allowing socket to clear and app threads to set
 401                                 tcpStatus CifsNeedReconnect if server hung */
 402                         if (pdu_length < 4) {
 403                                 iov.iov_base = (4 - pdu_length) +
 404                                                         (char *)smb_buffer;
 405                                 iov.iov_len = pdu_length;
 406                                 smb_msg.msg_control = NULL;
 407                                 smb_msg.msg_controllen = 0;
 408                                 goto incomplete_rcv;
 409                         } else
 410                                 continue;
 411                 } else if (length <= 0) {
 412                         if (server->tcpStatus == CifsNew) {
 413                                 cFYI(1, ("tcp session abend after SMBnegprot"));
 414                                 /* some servers kill the TCP session rather than
 415                                    returning an SMB negprot error, in which
 416                                    case reconnecting here is not going to help,
 417                                    and so simply return error to mount */
 418                                 break;
 419                         }
 420                         if (!try_to_freeze() && (length == -EINTR)) {
 421                                 cFYI(1, ("cifsd thread killed"));
 422                                 break;
 423                         }
 424                         cFYI(1, ("Reconnect after unexpected peek error %d",
 425                                 length));
 426                         cifs_reconnect(server);
 427                         csocket = server->ssocket;
 428                         wake_up(&server->response_q);
 429                         continue;
 430                 } else if (length < pdu_length) {
 431                         cFYI(1, ("requested %d bytes but only got %d bytes",
 432                                   pdu_length, length));
 433                         pdu_length -= length;
 434                         msleep(1);
 435                         goto incomplete_rcv;
 436                 }
 437
 438                 /* The right amount was read from socket - 4 bytes */
 439                 /* so we can now interpret the length field */
 440
 441                 /* the first byte big endian of the length field,
 442                 is actually not part of the length but the type
 443                 with the most common, zero, as regular data */
 444                 temp = *((char *) smb_buffer);
 445
 446                 /* Note that FC 1001 length is big endian on the wire,
 447                 but we convert it here so it is always manipulated
 448                 as host byte order */
 449                 pdu_length = be32_to_cpu((__force __be32)smb_buffer->smb_buf_length);
 450                 smb_buffer->smb_buf_length = pdu_length;
 451
 452                 cFYI(1, ("rfc1002 length 0x%x", pdu_length+4));
 453
 454                 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
 455                         continue;
 456                 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
 457                         cFYI(1, ("Good RFC 1002 session rsp"));
 458                         continue;
 459                 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
 460                         /* we get this from Windows 98 instead of
 461                            an error on SMB negprot response */
 462                         cFYI(1, ("Negative RFC1002 Session Response Error 0x%x)",
 463                                 pdu_length));
 464                         if (server->tcpStatus == CifsNew) {
 465                                 /* if nack on negprot (rather than
 466                                 ret of smb negprot error) reconnecting
 467                                 not going to help, ret error to mount */
 468                                 break;
 469                         } else {
 470                                 /* give server a second to
 471                                 clean up before reconnect attempt */
 472                                 msleep(1000);
 473                                 /* always try 445 first on reconnect
 474                                 since we get NACK on some if we ever
 475                                 connected to port 139 (the NACK is
 476                                 since we do not begin with RFC1001
 477                                 session initialize frame) */
 478                                 server->addr.sockAddr.sin_port =
 479                                         htons(CIFS_PORT);
 480                                 cifs_reconnect(server);
 481                                 csocket = server->ssocket;
 482                                 wake_up(&server->response_q);
 483                                 continue;
 484                         }
 485                 } else if (temp != (char) 0) {
 486                         cERROR(1, ("Unknown RFC 1002 frame"));
 487                         cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
 488                                       length);
 489                         cifs_reconnect(server);
 490                         csocket = server->ssocket;
 491                         continue;
 492                 }
 493
 494                 /* else we have an SMB response */
 495                 if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
 496                             (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) {
 497                         cERROR(1, ("Invalid size SMB length %d pdu_length %d",
 498                                         length, pdu_length+4));
 499                         cifs_reconnect(server);
 500                         csocket = server->ssocket;
 501                         wake_up(&server->response_q);
 502                         continue;
 503                 }
 504
 505                 /* else length ok */
 506                 reconnect = 0;
 507
 508                 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
 509                         isLargeBuf = true;
 510                         memcpy(bigbuf, smallbuf, 4);
 511                         smb_buffer = bigbuf;
 512                 }
 513                 length = 0;
 514                 iov.iov_base = 4 + (char *)smb_buffer;
 515                 iov.iov_len = pdu_length;
 516                 for (total_read = 0; total_read < pdu_length;
 517                      total_read += length) {
 518                         length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
 519                                                 pdu_length - total_read, 0);
 520                         if ((server->tcpStatus == CifsExiting) ||
 521                             (length == -EINTR)) {
 522                                 /* then will exit */
 523                                 reconnect = 2;
 524                                 break;
 525                         } else if (server->tcpStatus == CifsNeedReconnect) {
 526                                 cifs_reconnect(server);
 527                                 csocket = server->ssocket;
 528                                 /* Reconnect wakes up rspns q */
 529                                 /* Now we will reread sock */
 530                                 reconnect = 1;
 531                                 break;
 532                         } else if ((length == -ERESTARTSYS) ||
 533                                    (length == -EAGAIN)) {
 534                                 msleep(1); /* minimum sleep to prevent looping,
 535                                               allowing socket to clear and app
 536                                               threads to set tcpStatus
 537                                               CifsNeedReconnect if server hung*/
 538                                 length = 0;
 539                                 continue;
 540                         } else if (length <= 0) {
 541                                 cERROR(1, ("Received no data, expecting %d",
 542                                               pdu_length - total_read));
 543                                 cifs_reconnect(server);
 544                                 csocket = server->ssocket;
 545                                 reconnect = 1;
 546                                 break;
 547                         }
 548                 }
 549                 if (reconnect == 2)
 550                         break;
 551                 else if (reconnect == 1)
 552                         continue;
 553
 554                 length += 4; /* account for rfc1002 hdr */
 555
 556
 557                 dump_smb(smb_buffer, length);
 558                 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
 559                         cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
 560                         continue;
 561                 }
 562
 563
 564                 task_to_wake = NULL;
 565                 spin_lock(&GlobalMid_Lock);
 566                 list_for_each(tmp, &server->pending_mid_q) {
 567                         mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 568
 569                         if ((mid_entry->mid == smb_buffer->Mid) &&
 570                             (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
 571                             (mid_entry->command == smb_buffer->Command)) {
 572                                 if (check2ndT2(smb_buffer,server->maxBuf) > 0) {
 573                                         /* We have a multipart transact2 resp */
 574                                         isMultiRsp = true;
 575                                         if (mid_entry->resp_buf) {
 576                                                 /* merge response - fix up 1st*/
 577                                                 if (coalesce_t2(smb_buffer,
 578                                                         mid_entry->resp_buf)) {
 579                                                         mid_entry->multiRsp =
 580                                                                  true;
 581                                                         break;
 582                                                 } else {
 583                                                         /* all parts received */
 584                                                         mid_entry->multiEnd =
 585                                                                  true;
 586                                                         goto multi_t2_fnd;
 587                                                 }
 588                                         } else {
 589                                                 if (!isLargeBuf) {
 590                                                         cERROR(1,("1st trans2 resp needs bigbuf"));
 591                                         /* BB maybe we can fix this up,  switch
 592                                            to already allocated large buffer? */
 593                                                 } else {
 594                                                         /* Have first buffer */
 595                                                         mid_entry->resp_buf =
 596                                                                  smb_buffer;
 597                                                         mid_entry->largeBuf =
 598                                                                  true;
 599                                                         bigbuf = NULL;
 600                                                 }
 601                                         }
 602                                         break;
 603                                 }
 604                                 mid_entry->resp_buf = smb_buffer;
 605                                 mid_entry->largeBuf = isLargeBuf;
 606 multi_t2_fnd:
 607                                 task_to_wake = mid_entry->tsk;
 608                                 mid_entry->midState = MID_RESPONSE_RECEIVED;
 609 #ifdef CONFIG_CIFS_STATS2
 610                                 mid_entry->when_received = jiffies;
 611 #endif
 612                                 /* so we do not time out requests to  server
 613                                 which is still responding (since server could
 614                                 be busy but not dead) */
 615                                 server->lstrp = jiffies;
 616                                 break;
 617                         }
 618                 }
 619                 spin_unlock(&GlobalMid_Lock);
 620                 if (task_to_wake) {
 621                         /* Was previous buf put in mpx struct for multi-rsp? */
 622                         if (!isMultiRsp) {
 623                                 /* smb buffer will be freed by user thread */
 624                                 if (isLargeBuf)
 625                                         bigbuf = NULL;
 626                                 else
 627                                         smallbuf = NULL;
 628                         }
 629                         wake_up_process(task_to_wake);
 630                 } else if (!is_valid_oplock_break(smb_buffer, server) &&
 631                            !isMultiRsp) {
 632                         cERROR(1, ("No task to wake, unknown frame received! "
 633                                    "NumMids %d", midCount.counter));
 634                         cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
 635                                       sizeof(struct smb_hdr));
 636 #ifdef CONFIG_CIFS_DEBUG2
 637                         cifs_dump_detail(smb_buffer);
 638                         cifs_dump_mids(server);
 639 #endif /* CIFS_DEBUG2 */
 640
 641                 }
 642         } /* end while !EXITING */
 643
 644         /* take it off the list, if it's not already */
 645         write_lock(&cifs_tcp_ses_lock);
 646         list_del_init(&server->tcp_ses_list);
 647         write_unlock(&cifs_tcp_ses_lock);
 648
 649         spin_lock(&GlobalMid_Lock);
 650         server->tcpStatus = CifsExiting;
 651         spin_unlock(&GlobalMid_Lock);
 652         wake_up_all(&server->response_q);
 653
 654         /* check if we have blocked requests that need to free */
 655         /* Note that cifs_max_pending is normally 50, but
 656         can be set at module install time to as little as two */
 657         spin_lock(&GlobalMid_Lock);
 658         if (atomic_read(&server->inFlight) >= cifs_max_pending)
 659                 atomic_set(&server->inFlight, cifs_max_pending - 1);
 660         /* We do not want to set the max_pending too low or we
 661         could end up with the counter going negative */
 662         spin_unlock(&GlobalMid_Lock);
 663         /* Although there should not be any requests blocked on
 664         this queue it can not hurt to be paranoid and try to wake up requests
 665         that may haven been blocked when more than 50 at time were on the wire
 666         to the same server - they now will see the session is in exit state
 667         and get out of SendReceive.  */
 668         wake_up_all(&server->request_q);
 669         /* give those requests time to exit */
 670         msleep(125);
 671
 672         if (server->ssocket) {
 673                 sock_release(csocket);
 674                 server->ssocket = NULL;
 675         }
 676         /* buffer usuallly freed in free_mid - need to free it here on exit */
 677         cifs_buf_release(bigbuf);
 678         if (smallbuf) /* no sense logging a debug message if NULL */
 679                 cifs_small_buf_release(smallbuf);
 680
 681         /*
 682          * BB: we shouldn't have to do any of this. It shouldn't be
 683          * possible to exit from the thread with active SMB sessions
 684          */
 685         read_lock(&cifs_tcp_ses_lock);
 686         if (list_empty(&server->pending_mid_q)) {
 687                 /* loop through server session structures attached to this and
 688                     mark them dead */
 689                 list_for_each(tmp, &server->smb_ses_list) {
 690                         ses = list_entry(tmp, struct cifsSesInfo,
 691                                          smb_ses_list);
 692                         ses->status = CifsExiting;
 693                         ses->server = NULL;
 694                 }
 695                 read_unlock(&cifs_tcp_ses_lock);
 696         } else {
 697                 /* although we can not zero the server struct pointer yet,
 698                 since there are active requests which may depnd on them,
 699                 mark the corresponding SMB sessions as exiting too */
 700                 list_for_each(tmp, &server->smb_ses_list) {
 701                         ses = list_entry(tmp, struct cifsSesInfo,
 702                                          smb_ses_list);
 703                         ses->status = CifsExiting;
 704                 }
 705
 706                 spin_lock(&GlobalMid_Lock);
 707                 list_for_each(tmp, &server->pending_mid_q) {
 708                 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
 709                         if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
 710                                 cFYI(1, ("Clearing Mid 0x%x - waking up ",
 711                                          mid_entry->mid));
 712                                 task_to_wake = mid_entry->tsk;
 713                                 if (task_to_wake)
 714                                         wake_up_process(task_to_wake);
 715                         }
 716                 }
 717                 spin_unlock(&GlobalMid_Lock);
 718                 read_unlock(&cifs_tcp_ses_lock);
 719                 /* 1/8th of sec is more than enough time for them to exit */
 720                 msleep(125);
 721         }
 722
 723         if (!list_empty(&server->pending_mid_q)) {
 724                 /* mpx threads have not exited yet give them
 725                 at least the smb send timeout time for long ops */
 726                 /* due to delays on oplock break requests, we need
 727                 to wait at least 45 seconds before giving up
 728                 on a request getting a response and going ahead
 729                 and killing cifsd */
 730                 cFYI(1, ("Wait for exit from demultiplex thread"));
 731                 msleep(46000);
 732                 /* if threads still have not exited they are probably never
 733                 coming home not much else we can do but free the memory */
 734         }
 735
 736         /* last chance to mark ses pointers invalid
 737         if there are any pointing to this (e.g
 738         if a crazy root user tried to kill cifsd
 739         kernel thread explicitly this might happen) */
 740         /* BB: This shouldn't be necessary, see above */
 741         read_lock(&cifs_tcp_ses_lock);
 742         list_for_each(tmp, &server->smb_ses_list) {
 743                 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
 744                 ses->server = NULL;
 745         }
 746         read_unlock(&cifs_tcp_ses_lock);
 747
 748         kfree(server->hostname);
 749         task_to_wake = xchg(&server->tsk, NULL);
 750         kfree(server);
 751
 752         length = atomic_dec_return(&tcpSesAllocCount);
 753         if (length  > 0)
 754                 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
 755                                 GFP_KERNEL);
 756
 757         /* if server->tsk was NULL then wait for a signal before exiting */
 758         if (!task_to_wake) {
 759                 set_current_state(TASK_INTERRUPTIBLE);
 760                 while (!signal_pending(current)) {
 761                         schedule();
 762                         set_current_state(TASK_INTERRUPTIBLE);
 763                 }
 764                 set_current_state(TASK_RUNNING);
 765         }
 766
 767         module_put_and_exit(0);
 768 }
 769
 770 /* extract the host portion of the UNC string */
 771 static char *
 772 extract_hostname(const char *unc)
 773 {
 774         const char *src;
 775         char *dst, *delim;
 776         unsigned int len;
 777
 778         /* skip double chars at beginning of string */
 779         /* BB: check validity of these bytes? */
 780         src = unc + 2;
 781
 782         /* delimiter between hostname and sharename is always '\\' now */
 783         delim = strchr(src, '\\');
 784         if (!delim)
 785                 return ERR_PTR(-EINVAL);
 786
 787         len = delim - src;
 788         dst = kmalloc((len + 1), GFP_KERNEL);
 789         if (dst == NULL)
 790                 return ERR_PTR(-ENOMEM);
 791
 792         memcpy(dst, src, len);
 793         dst[len] = '\0';
 794
 795         return dst;
 796 }
 797
 798 static int
 799 cifs_parse_mount_options(char *options, const char *devname,
 800                          struct smb_vol *vol)
 801 {
 802         char *value;
 803         char *data;
 804         unsigned int  temp_len, i, j;
 805         char separator[2];
 806         short int override_uid = -1;
 807         short int override_gid = -1;
 808         bool uid_specified = false;
 809         bool gid_specified = false;
 810
 811         separator[0] = ',';
 812         separator[1] = 0;
 813
 814         if (Local_System_Name[0] != 0)
 815                 memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
 816         else {
 817                 char *nodename = utsname()->nodename;
 818                 int n = strnlen(nodename, 15);
 819                 memset(vol->source_rfc1001_name, 0x20, 15);
 820                 for (i = 0; i < n; i++) {
 821                         /* does not have to be perfect mapping since field is
 822                         informational, only used for servers that do not support
 823                         port 445 and it can be overridden at mount time */
 824                         vol->source_rfc1001_name[i] = toupper(nodename[i]);
 825                 }
 826         }
 827         vol->source_rfc1001_name[15] = 0;
 828         /* null target name indicates to use *SMBSERVR default called name
 829            if we end up sending RFC1001 session initialize */
 830         vol->target_rfc1001_name[0] = 0;
 831         vol->linux_uid = current_uid();  /* use current_euid() instead? */
 832         vol->linux_gid = current_gid();
 833
 834         /* default to only allowing write access to owner of the mount */
 835         vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR;
 836
 837         /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
 838         /* default is always to request posix paths. */
 839         vol->posix_paths = 1;
 840         /* default to using server inode numbers where available */
 841         vol->server_ino = 1;
 842
 843         if (!options)
 844                 return 1;
 845
 846         if (strncmp(options, "sep=", 4) == 0) {
 847                 if (options[4] != 0) {
 848                         separator[0] = options[4];
 849                         options += 5;
 850                 } else {
 851                         cFYI(1, ("Null separator not allowed"));
 852                 }
 853         }
 854
 855         while ((data = strsep(&options, separator)) != NULL) {
 856                 if (!*data)
 857                         continue;
 858                 if ((value = strchr(data, '=')) != NULL)
 859                         *value++ = '\0';
 860
 861                 /* Have to parse this before we parse for "user" */
 862                 if (strnicmp(data, "user_xattr", 10) == 0) {
 863                         vol->no_xattr = 0;
 864                 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
 865                         vol->no_xattr = 1;
 866                 } else if (strnicmp(data, "user", 4) == 0) {
 867                         if (!value) {
 868                                 printk(KERN_WARNING
 869                                        "CIFS: invalid or missing username\n");
 870                                 return 1;       /* needs_arg; */
 871                         } else if (!*value) {
 872                                 /* null user, ie anonymous, authentication */
 873                                 vol->nullauth = 1;
 874                         }
 875                         if (strnlen(value, 200) < 200) {
 876                                 vol->username = value;
 877                         } else {
 878                                 printk(KERN_WARNING "CIFS: username too long\n");
 879                                 return 1;
 880                         }
 881                 } else if (strnicmp(data, "pass", 4) == 0) {
 882                         if (!value) {
 883                                 vol->password = NULL;
 884                                 continue;
 885                         } else if (value[0] == 0) {
 886                                 /* check if string begins with double comma
 887                                    since that would mean the password really
 888                                    does start with a comma, and would not
 889                                    indicate an empty string */
 890                                 if (value[1] != separator[0]) {
 891                                         vol->password = NULL;
 892                                         continue;
 893                                 }
 894                         }
 895                         temp_len = strlen(value);
 896                         /* removed password length check, NTLM passwords
 897                                 can be arbitrarily long */
 898
 899                         /* if comma in password, the string will be
 900                         prematurely null terminated.  Commas in password are
 901                         specified across the cifs mount interface by a double
 902                         comma ie ,, and a comma used as in other cases ie ','
 903                         as a parameter delimiter/separator is single and due
 904                         to the strsep above is temporarily zeroed. */
 905
 906                         /* NB: password legally can have multiple commas and
 907                         the only illegal character in a password is null */
 908
 909                         if ((value[temp_len] == 0) &&
 910                             (value[temp_len+1] == separator[0])) {
 911                                 /* reinsert comma */
 912                                 value[temp_len] = separator[0];
 913                                 temp_len += 2;  /* move after second comma */
 914                                 while (value[temp_len] != 0)  {
 915                                         if (value[temp_len] == separator[0]) {
 916                                                 if (value[temp_len+1] ==
 917                                                      separator[0]) {
 918                                                 /* skip second comma */
 919                                                         temp_len++;
 920                                                 } else {
 921                                                 /* single comma indicating start
 922                                                          of next parm */
 923                                                         break;
 924                                                 }
 925                                         }
 926                                         temp_len++;
 927                                 }
 928                                 if (value[temp_len] == 0) {
 929                                         options = NULL;
 930                                 } else {
 931                                         value[temp_len] = 0;
 932                                         /* point option to start of next parm */
 933                                         options = value + temp_len + 1;
 934                                 }
 935                                 /* go from value to value + temp_len condensing
 936                                 double commas to singles. Note that this ends up
 937                                 allocating a few bytes too many, which is ok */
 938                                 vol->password = kzalloc(temp_len, GFP_KERNEL);
 939                                 if (vol->password == NULL) {
 940                                         printk(KERN_WARNING "CIFS: no memory "
 941                                                             "for password\n");
 942                                         return 1;
 943                                 }
 944                                 for (i = 0, j = 0; i < temp_len; i++, j++) {
 945                                         vol->password[j] = value[i];
 946                                         if (value[i] == separator[0]
 947                                                 && value[i+1] == separator[0]) {
 948                                                 /* skip second comma */
 949                                                 i++;
 950                                         }
 951                                 }
 952                                 vol->password[j] = 0;
 953                         } else {
 954                                 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
 955                                 if (vol->password == NULL) {
 956                                         printk(KERN_WARNING "CIFS: no memory "
 957                                                             "for password\n");
 958                                         return 1;
 959                                 }
 960                                 strcpy(vol->password, value);
 961                         }
 962                 } else if (!strnicmp(data, "ip", 2) ||
 963                            !strnicmp(data, "addr", 4)) {
 964                         if (!value || !*value) {
 965                                 vol->UNCip = NULL;
 966                         } else if (strnlen(value, INET6_ADDRSTRLEN) <
 967                                                         INET6_ADDRSTRLEN) {
 968                                 vol->UNCip = value;
 969                         } else {
 970                                 printk(KERN_WARNING "CIFS: ip address "
 971                                                     "too long\n");
 972                                 return 1;
 973                         }
 974                 } else if (strnicmp(data, "sec", 3) == 0) {
 975                         if (!value || !*value) {
 976                                 cERROR(1, ("no security value specified"));
 977                                 continue;
 978                         } else if (strnicmp(value, "krb5i", 5) == 0) {
 979                                 vol->secFlg |= CIFSSEC_MAY_KRB5 |
 980                                         CIFSSEC_MUST_SIGN;
 981                         } else if (strnicmp(value, "krb5p", 5) == 0) {
 982                                 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
 983                                         CIFSSEC_MAY_KRB5; */
 984                                 cERROR(1, ("Krb5 cifs privacy not supported"));
 985                                 return 1;
 986                         } else if (strnicmp(value, "krb5", 4) == 0) {
 987                                 vol->secFlg |= CIFSSEC_MAY_KRB5;
 988 #ifdef CONFIG_CIFS_EXPERIMENTAL
 989                         } else if (strnicmp(value, "ntlmsspi", 8) == 0) {
 990                                 vol->secFlg |= CIFSSEC_MAY_NTLMSSP |
 991                                         CIFSSEC_MUST_SIGN;
 992                         } else if (strnicmp(value, "ntlmssp", 7) == 0) {
 993                                 vol->secFlg |= CIFSSEC_MAY_NTLMSSP;
 994 #endif
 995                         } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
 996                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
 997                                         CIFSSEC_MUST_SIGN;
 998                         } else if (strnicmp(value, "ntlmv2", 6) == 0) {
 999                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
1000                         } else if (strnicmp(value, "ntlmi", 5) == 0) {
1001                                 vol->secFlg |= CIFSSEC_MAY_NTLM |
1002                                         CIFSSEC_MUST_SIGN;
1003                         } else if (strnicmp(value, "ntlm", 4) == 0) {
1004                                 /* ntlm is default so can be turned off too */
1005                                 vol->secFlg |= CIFSSEC_MAY_NTLM;
1006                         } else if (strnicmp(value, "nontlm", 6) == 0) {
1007                                 /* BB is there a better way to do this? */
1008                                 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
1009 #ifdef CONFIG_CIFS_WEAK_PW_HASH
1010                         } else if (strnicmp(value, "lanman", 6) == 0) {
1011                                 vol->secFlg |= CIFSSEC_MAY_LANMAN;
1012 #endif
1013                         } else if (strnicmp(value, "none", 4) == 0) {
1014                                 vol->nullauth = 1;
1015                         } else {
1016                                 cERROR(1, ("bad security option: %s", value));
1017                                 return 1;
1018                         }
1019                 } else if ((strnicmp(data, "unc", 3) == 0)
1020                            || (strnicmp(data, "target", 6) == 0)
1021                            || (strnicmp(data, "path", 4) == 0)) {
1022                         if (!value || !*value) {
1023                                 printk(KERN_WARNING "CIFS: invalid path to "
1024                                                     "network resource\n");
1025                                 return 1;       /* needs_arg; */
1026                         }
1027                         if ((temp_len = strnlen(value, 300)) < 300) {
1028                                 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1029                                 if (vol->UNC == NULL)
1030                                         return 1;
1031                                 strcpy(vol->UNC, value);
1032                                 if (strncmp(vol->UNC, "//", 2) == 0) {
1033                                         vol->UNC[0] = '\\';
1034                                         vol->UNC[1] = '\\';
1035                                 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1036                                         printk(KERN_WARNING
1037                                                "CIFS: UNC Path does not begin "
1038                                                "with // or \\\\ \n");
1039                                         return 1;
1040                                 }
1041                         } else {
1042                                 printk(KERN_WARNING "CIFS: UNC name too long\n");
1043                                 return 1;
1044                         }
1045                 } else if ((strnicmp(data, "domain", 3) == 0)
1046                            || (strnicmp(data, "workgroup", 5) == 0)) {
1047                         if (!value || !*value) {
1048                                 printk(KERN_WARNING "CIFS: invalid domain name\n");
1049                                 return 1;       /* needs_arg; */
1050                         }
1051                         /* BB are there cases in which a comma can be valid in
1052                         a domain name and need special handling? */
1053                         if (strnlen(value, 256) < 256) {
1054                                 vol->domainname = value;
1055                                 cFYI(1, ("Domain name set"));
1056                         } else {
1057                                 printk(KERN_WARNING "CIFS: domain name too "
1058                                                     "long\n");
1059                                 return 1;
1060                         }
1061                 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1062                         if (!value || !*value) {
1063                                 printk(KERN_WARNING
1064                                         "CIFS: invalid path prefix\n");
1065                                 return 1;       /* needs_argument */
1066                         }
1067                         if ((temp_len = strnlen(value, 1024)) < 1024) {
1068                                 if (value[0] != '/')
1069                                         temp_len++;  /* missing leading slash */
1070                                 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1071                                 if (vol->prepath == NULL)
1072                                         return 1;
1073                                 if (value[0] != '/') {
1074                                         vol->prepath[0] = '/';
1075                                         strcpy(vol->prepath+1, value);
1076                                 } else
1077                                         strcpy(vol->prepath, value);
1078                                 cFYI(1, ("prefix path %s", vol->prepath));
1079                         } else {
1080                                 printk(KERN_WARNING "CIFS: prefix too long\n");
1081                                 return 1;
1082                         }
1083                 } else if (strnicmp(data, "iocharset", 9) == 0) {
1084                         if (!value || !*value) {
1085                                 printk(KERN_WARNING "CIFS: invalid iocharset "
1086                                                     "specified\n");
1087                                 return 1;       /* needs_arg; */
1088                         }
1089                         if (strnlen(value, 65) < 65) {
1090                                 if (strnicmp(value, "default", 7))
1091                                         vol->iocharset = value;
1092                                 /* if iocharset not set then load_nls_default
1093                                    is used by caller */
1094                                 cFYI(1, ("iocharset set to %s", value));
1095                         } else {
1096                                 printk(KERN_WARNING "CIFS: iocharset name "
1097                                                     "too long.\n");
1098                                 return 1;
1099                         }
1100                 } else if (!strnicmp(data, "uid", 3) && value && *value) {
1101                         vol->linux_uid = simple_strtoul(value, &value, 0);
1102                         uid_specified = true;
1103                 } else if (!strnicmp(data, "forceuid", 8)) {
1104                         override_uid = 1;
1105                 } else if (!strnicmp(data, "noforceuid", 10)) {
1106                         override_uid = 0;
1107                 } else if (!strnicmp(data, "gid", 3) && value && *value) {
1108                         vol->linux_gid = simple_strtoul(value, &value, 0);
1109                         gid_specified = true;
1110                 } else if (!strnicmp(data, "forcegid", 8)) {
1111                         override_gid = 1;
1112                 } else if (!strnicmp(data, "noforcegid", 10)) {
1113                         override_gid = 0;
1114                 } else if (strnicmp(data, "file_mode", 4) == 0) {
1115                         if (value && *value) {
1116                                 vol->file_mode =
1117                                         simple_strtoul(value, &value, 0);
1118                         }
1119                 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1120                         if (value && *value) {
1121                                 vol->dir_mode =
1122                                         simple_strtoul(value, &value, 0);
1123                         }
1124                 } else if (strnicmp(data, "dirmode", 4) == 0) {
1125                         if (value && *value) {
1126                                 vol->dir_mode =
1127                                         simple_strtoul(value, &value, 0);
1128                         }
1129                 } else if (strnicmp(data, "port", 4) == 0) {
1130                         if (value && *value) {
1131                                 vol->port =
1132                                         simple_strtoul(value, &value, 0);
1133                         }
1134                 } else if (strnicmp(data, "rsize", 5) == 0) {
1135                         if (value && *value) {
1136                                 vol->rsize =
1137                                         simple_strtoul(value, &value, 0);
1138                         }
1139                 } else if (strnicmp(data, "wsize", 5) == 0) {
1140                         if (value && *value) {
1141                                 vol->wsize =
1142                                         simple_strtoul(value, &value, 0);
1143                         }
1144                 } else if (strnicmp(data, "sockopt", 5) == 0) {
1145                         if (value && *value) {
1146                                 vol->sockopt =
1147                                         simple_strtoul(value, &value, 0);
1148                         }
1149                 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1150                         if (!value || !*value || (*value == ' ')) {
1151                                 cFYI(1, ("invalid (empty) netbiosname"));
1152                         } else {
1153                                 memset(vol->source_rfc1001_name, 0x20, 15);
1154                                 for (i = 0; i < 15; i++) {
1155                                 /* BB are there cases in which a comma can be
1156                                 valid in this workstation netbios name (and need
1157                                 special handling)? */
1158
1159                                 /* We do not uppercase netbiosname for user */
1160                                         if (value[i] == 0)
1161                                                 break;
1162                                         else
1163                                                 vol->source_rfc1001_name[i] =
1164                                                                 value[i];
1165                                 }
1166                                 /* The string has 16th byte zero still from
1167                                 set at top of the function  */
1168                                 if ((i == 15) && (value[i] != 0))
1169                                         printk(KERN_WARNING "CIFS: netbiosname"
1170                                                 " longer than 15 truncated.\n");
1171                         }
1172                 } else if (strnicmp(data, "servern", 7) == 0) {
1173                         /* servernetbiosname specified override *SMBSERVER */
1174                         if (!value || !*value || (*value == ' ')) {
1175                                 cFYI(1, ("empty server netbiosname specified"));
1176                         } else {
1177                                 /* last byte, type, is 0x20 for servr type */
1178                                 memset(vol->target_rfc1001_name, 0x20, 16);
1179
1180                                 for (i = 0; i < 15; i++) {
1181                                 /* BB are there cases in which a comma can be
1182                                    valid in this workstation netbios name
1183                                    (and need special handling)? */
1184
1185                                 /* user or mount helper must uppercase
1186                                    the netbiosname */
1187                                         if (value[i] == 0)
1188                                                 break;
1189                                         else
1190                                                 vol->target_rfc1001_name[i] =
1191                                                                 value[i];
1192                                 }
1193                                 /* The string has 16th byte zero still from
1194                                    set at top of the function  */
1195                                 if ((i == 15) && (value[i] != 0))
1196                                         printk(KERN_WARNING "CIFS: server net"
1197                                         "biosname longer than 15 truncated.\n");
1198                         }
1199                 } else if (strnicmp(data, "credentials", 4) == 0) {
1200                         /* ignore */
1201                 } else if (strnicmp(data, "version", 3) == 0) {
1202                         /* ignore */
1203                 } else if (strnicmp(data, "guest", 5) == 0) {
1204                         /* ignore */
1205                 } else if (strnicmp(data, "rw", 2) == 0) {
1206                         /* ignore */
1207                 } else if (strnicmp(data, "ro", 2) == 0) {
1208                         /* ignore */
1209                 } else if (strnicmp(data, "noblocksend", 11) == 0) {
1210                         vol->noblocksnd = 1;
1211                 } else if (strnicmp(data, "noautotune", 10) == 0) {
1212                         vol->noautotune = 1;
1213                 } else if ((strnicmp(data, "suid", 4) == 0) ||
1214                                    (strnicmp(data, "nosuid", 6) == 0) ||
1215                                    (strnicmp(data, "exec", 4) == 0) ||
1216                                    (strnicmp(data, "noexec", 6) == 0) ||
1217                                    (strnicmp(data, "nodev", 5) == 0) ||
1218                                    (strnicmp(data, "noauto", 6) == 0) ||
1219                                    (strnicmp(data, "dev", 3) == 0)) {
1220                         /*  The mount tool or mount.cifs helper (if present)
1221                             uses these opts to set flags, and the flags are read
1222                             by the kernel vfs layer before we get here (ie
1223                             before read super) so there is no point trying to
1224                             parse these options again and set anything and it
1225                             is ok to just ignore them */
1226                         continue;
1227                 } else if (strnicmp(data, "hard", 4) == 0) {
1228                         vol->retry = 1;
1229                 } else if (strnicmp(data, "soft", 4) == 0) {
1230                         vol->retry = 0;
1231                 } else if (strnicmp(data, "perm", 4) == 0) {
1232                         vol->noperm = 0;
1233                 } else if (strnicmp(data, "noperm", 6) == 0) {
1234                         vol->noperm = 1;
1235                 } else if (strnicmp(data, "mapchars", 8) == 0) {
1236                         vol->remap = 1;
1237                 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1238                         vol->remap = 0;
1239                 } else if (strnicmp(data, "sfu", 3) == 0) {
1240                         vol->sfu_emul = 1;
1241                 } else if (strnicmp(data, "nosfu", 5) == 0) {
1242                         vol->sfu_emul = 0;
1243                 } else if (strnicmp(data, "nodfs", 5) == 0) {
1244                         vol->nodfs = 1;
1245                 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1246                         vol->posix_paths = 1;
1247                 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1248                         vol->posix_paths = 0;
1249                 } else if (strnicmp(data, "nounix", 6) == 0) {
1250                         vol->no_linux_ext = 1;
1251                 } else if (strnicmp(data, "nolinux", 7) == 0) {
1252                         vol->no_linux_ext = 1;
1253                 } else if ((strnicmp(data, "nocase", 6) == 0) ||
1254                            (strnicmp(data, "ignorecase", 10)  == 0)) {
1255                         vol->nocase = 1;
1256                 } else if (strnicmp(data, "brl", 3) == 0) {
1257                         vol->nobrl =  0;
1258                 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1259                            (strnicmp(data, "nolock", 6) == 0)) {
1260                         vol->nobrl =  1;
1261                         /* turn off mandatory locking in mode
1262                         if remote locking is turned off since the
1263                         local vfs will do advisory */
1264                         if (vol->file_mode ==
1265                                 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
1266                                 vol->file_mode = S_IALLUGO;
1267                 } else if (strnicmp(data, "forcemandatorylock", 9) == 0) {
1268                         /* will take the shorter form "forcemand" as well */
1269                         /* This mount option will force use of mandatory
1270                           (DOS/Windows style) byte range locks, instead of
1271                           using posix advisory byte range locks, even if the
1272                           Unix extensions are available and posix locks would
1273                           be supported otherwise. If Unix extensions are not
1274                           negotiated this has no effect since mandatory locks
1275                           would be used (mandatory locks is all that those
1276                           those servers support) */
1277                         vol->mand_lock = 1;
1278                 } else if (strnicmp(data, "setuids", 7) == 0) {
1279                         vol->setuids = 1;
1280                 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1281                         vol->setuids = 0;
1282                 } else if (strnicmp(data, "dynperm", 7) == 0) {
1283                         vol->dynperm = true;
1284                 } else if (strnicmp(data, "nodynperm", 9) == 0) {
1285                         vol->dynperm = false;
1286                 } else if (strnicmp(data, "nohard", 6) == 0) {
1287                         vol->retry = 0;
1288                 } else if (strnicmp(data, "nosoft", 6) == 0) {
1289                         vol->retry = 1;
1290                 } else if (strnicmp(data, "nointr", 6) == 0) {
1291                         vol->intr = 0;
1292                 } else if (strnicmp(data, "intr", 4) == 0) {
1293                         vol->intr = 1;
1294                 } else if (strnicmp(data, "nostrictsync", 12) == 0) {
1295                         vol->nostrictsync = 1;
1296                 } else if (strnicmp(data, "strictsync", 10) == 0) {
1297                         vol->nostrictsync = 0;
1298                 } else if (strnicmp(data, "serverino", 7) == 0) {
1299                         vol->server_ino = 1;
1300                 } else if (strnicmp(data, "noserverino", 9) == 0) {
1301                         vol->server_ino = 0;
1302                 } else if (strnicmp(data, "cifsacl", 7) == 0) {
1303                         vol->cifs_acl = 1;
1304                 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1305                         vol->cifs_acl = 0;
1306                 } else if (strnicmp(data, "acl", 3) == 0) {
1307                         vol->no_psx_acl = 0;
1308                 } else if (strnicmp(data, "noacl", 5) == 0) {
1309                         vol->no_psx_acl = 1;
1310 #ifdef CONFIG_CIFS_EXPERIMENTAL
1311                 } else if (strnicmp(data, "locallease", 6) == 0) {
1312                         vol->local_lease = 1;
1313 #endif
1314                 } else if (strnicmp(data, "sign", 4) == 0) {
1315                         vol->secFlg |= CIFSSEC_MUST_SIGN;
1316                 } else if (strnicmp(data, "seal", 4) == 0) {
1317                         /* we do not do the following in secFlags because seal
1318                            is a per tree connection (mount) not a per socket
1319                            or per-smb connection option in the protocol */
1320                         /* vol->secFlg |= CIFSSEC_MUST_SEAL; */
1321                         vol->seal = 1;
1322                 } else if (strnicmp(data, "direct", 6) == 0) {
1323                         vol->direct_io = 1;
1324                 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
1325                         vol->direct_io = 1;
1326                 } else if (strnicmp(data, "noac", 4) == 0) {
1327                         printk(KERN_WARNING "CIFS: Mount option noac not "
1328                                 "supported. Instead set "
1329                                 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1330                 } else
1331                         printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1332                                                 data);
1333         }
1334         if (vol->UNC == NULL) {
1335                 if (devname == NULL) {
1336                         printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1337                                                 "target\n");
1338                         return 1;
1339                 }
1340                 if ((temp_len = strnlen(devname, 300)) < 300) {
1341                         vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
1342                         if (vol->UNC == NULL)
1343                                 return 1;
1344                         strcpy(vol->UNC, devname);
1345                         if (strncmp(vol->UNC, "//", 2) == 0) {
1346                                 vol->UNC[0] = '\\';
1347                                 vol->UNC[1] = '\\';
1348                         } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1349                                 printk(KERN_WARNING "CIFS: UNC Path does not "
1350                                                     "begin with // or \\\\ \n");
1351                                 return 1;
1352                         }
1353                         value = strpbrk(vol->UNC+2, "/\\");
1354                         if (value)
1355                                 *value = '\\';
1356                 } else {
1357                         printk(KERN_WARNING "CIFS: UNC name too long\n");
1358                         return 1;
1359                 }
1360         }
1361         if (vol->UNCip == NULL)
1362                 vol->UNCip = &vol->UNC[2];
1363
1364         if (uid_specified)
1365                 vol->override_uid = override_uid;
1366         else if (override_uid == 1)
1367                 printk(KERN_NOTICE "CIFS: ignoring forceuid mount option "
1368                                    "specified with no uid= option.\n");
1369
1370         if (gid_specified)
1371                 vol->override_gid = override_gid;
1372         else if (override_gid == 1)
1373                 printk(KERN_NOTICE "CIFS: ignoring forcegid mount option "
1374                                    "specified with no gid= option.\n");
1375
1376         return 0;
1377 }
1378
1379 static struct TCP_Server_Info *
1380 cifs_find_tcp_session(struct sockaddr_storage *addr, unsigned short int port)
1381 {
1382         struct list_head *tmp;
1383         struct TCP_Server_Info *server;
1384         struct sockaddr_in *addr4 = (struct sockaddr_in *) addr;
1385         struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) addr;
1386
1387         write_lock(&cifs_tcp_ses_lock);
1388         list_for_each(tmp, &cifs_tcp_ses_list) {
1389                 server = list_entry(tmp, struct TCP_Server_Info,
1390                                     tcp_ses_list);
1391                 /*
1392                  * the demux thread can exit on its own while still in CifsNew
1393                  * so don't accept any sockets in that state. Since the
1394                  * tcpStatus never changes back to CifsNew it's safe to check
1395                  * for this without a lock.
1396                  */
1397                 if (server->tcpStatus == CifsNew)
1398                         continue;
1399
1400                 switch (addr->ss_family) {
1401                 case AF_INET:
1402                         if (addr4->sin_addr.s_addr ==
1403                             server->addr.sockAddr.sin_addr.s_addr) {
1404                                 addr4->sin_port = htons(port);
1405                                 /* user overrode default port? */
1406                                 if (addr4->sin_port) {
1407                                         if (addr4->sin_port !=
1408                                             server->addr.sockAddr.sin_port)
1409                                                 continue;
1410                                 }
1411                                 break;
1412                         } else
1413                                 continue;
1414
1415                 case AF_INET6:
1416                         if (ipv6_addr_equal(&addr6->sin6_addr,
1417                             &server->addr.sockAddr6.sin6_addr) &&
1418                             (addr6->sin6_scope_id ==
1419                             server->addr.sockAddr6.sin6_scope_id)) {
1420                                 addr6->sin6_port = htons(port);
1421                                 /* user overrode default port? */
1422                                 if (addr6->sin6_port) {
1423                                         if (addr6->sin6_port !=
1424                                            server->addr.sockAddr6.sin6_port)
1425                                                 continue;
1426                                 }
1427                                 break;
1428                         } else
1429                                 continue;
1430                 }
1431
1432                 ++server->srv_count;
1433                 write_unlock(&cifs_tcp_ses_lock);
1434                 cFYI(1, ("Existing tcp session with server found"));
1435                 return server;
1436         }
1437         write_unlock(&cifs_tcp_ses_lock);
1438         return NULL;
1439 }
1440
1441 static void
1442 cifs_put_tcp_session(struct TCP_Server_Info *server)
1443 {
1444         struct task_struct *task;
1445
1446         write_lock(&cifs_tcp_ses_lock);
1447         if (--server->srv_count > 0) {
1448                 write_unlock(&cifs_tcp_ses_lock);
1449                 return;
1450         }
1451
1452         list_del_init(&server->tcp_ses_list);
1453         write_unlock(&cifs_tcp_ses_lock);
1454
1455         spin_lock(&GlobalMid_Lock);
1456         server->tcpStatus = CifsExiting;
1457         spin_unlock(&GlobalMid_Lock);
1458
1459         task = xchg(&server->tsk, NULL);
1460         if (task)
1461                 force_sig(SIGKILL, task);
1462 }
1463
1464 static struct TCP_Server_Info *
1465 cifs_get_tcp_session(struct smb_vol *volume_info)
1466 {
1467         struct TCP_Server_Info *tcp_ses = NULL;
1468         struct sockaddr_storage addr;
1469         struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
1470         struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
1471         int rc;
1472
1473         memset(&addr, 0, sizeof(struct sockaddr_storage));
1474
1475         cFYI(1, ("UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip));
1476
1477         if (volume_info->UNCip && volume_info->UNC) {
1478                 rc = cifs_convert_address(volume_info->UNCip, &addr);
1479                 if (!rc) {
1480                         /* we failed translating address */
1481                         rc = -EINVAL;
1482                         goto out_err;
1483                 }
1484         } else if (volume_info->UNCip) {
1485                 /* BB using ip addr as tcp_ses name to connect to the
1486                    DFS root below */
1487                 cERROR(1, ("Connecting to DFS root not implemented yet"));
1488                 rc = -EINVAL;
1489                 goto out_err;
1490         } else /* which tcp_sess DFS root would we conect to */ {
1491                 cERROR(1,
1492                        ("CIFS mount error: No UNC path (e.g. -o "
1493                         "unc=//192.168.1.100/public) specified"));
1494                 rc = -EINVAL;
1495                 goto out_err;
1496         }
1497
1498         /* see if we already have a matching tcp_ses */
1499         tcp_ses = cifs_find_tcp_session(&addr, volume_info->port);
1500         if (tcp_ses)
1501                 return tcp_ses;
1502
1503         tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1504         if (!tcp_ses) {
1505                 rc = -ENOMEM;
1506                 goto out_err;
1507         }
1508
1509         tcp_ses->hostname = extract_hostname(volume_info->UNC);
1510         if (IS_ERR(tcp_ses->hostname)) {
1511                 rc = PTR_ERR(tcp_ses->hostname);
1512                 goto out_err;
1513         }
1514
1515         tcp_ses->noblocksnd = volume_info->noblocksnd;
1516         tcp_ses->noautotune = volume_info->noautotune;
1517         atomic_set(&tcp_ses->inFlight, 0);
1518         init_waitqueue_head(&tcp_ses->response_q);
1519         init_waitqueue_head(&tcp_ses->request_q);
1520         INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
1521         mutex_init(&tcp_ses->srv_mutex);
1522         memcpy(tcp_ses->workstation_RFC1001_name,
1523                 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1524         memcpy(tcp_ses->server_RFC1001_name,
1525                 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1526         tcp_ses->sequence_number = 0;
1527         INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
1528         INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
1529
1530         /*
1531          * at this point we are the only ones with the pointer
1532          * to the struct since the kernel thread not created yet
1533          * no need to spinlock this init of tcpStatus or srv_count
1534          */
1535         tcp_ses->tcpStatus = CifsNew;
1536         ++tcp_ses->srv_count;
1537
1538         if (addr.ss_family == AF_INET6) {
1539                 cFYI(1, ("attempting ipv6 connect"));
1540                 /* BB should we allow ipv6 on port 139? */
1541                 /* other OS never observed in Wild doing 139 with v6 */
1542                 sin_server6->sin6_port = htons(volume_info->port);
1543                 memcpy(&tcp_ses->addr.sockAddr6, sin_server6,
1544                         sizeof(struct sockaddr_in6));
1545                 rc = ipv6_connect(tcp_ses);
1546         } else {
1547                 sin_server->sin_port = htons(volume_info->port);
1548                 memcpy(&tcp_ses->addr.sockAddr, sin_server,
1549                         sizeof(struct sockaddr_in));
1550                 rc = ipv4_connect(tcp_ses);
1551         }
1552         if (rc < 0) {
1553                 cERROR(1, ("Error connecting to socket. Aborting operation"));
1554                 goto out_err;
1555         }
1556
1557         /*
1558          * since we're in a cifs function already, we know that
1559          * this will succeed. No need for try_module_get().
1560          */
1561         __module_get(THIS_MODULE);
1562         tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread,
1563                                   tcp_ses, "cifsd");
1564         if (IS_ERR(tcp_ses->tsk)) {
1565                 rc = PTR_ERR(tcp_ses->tsk);
1566                 cERROR(1, ("error %d create cifsd thread", rc));
1567                 module_put(THIS_MODULE);
1568                 goto out_err;
1569         }
1570
1571         /* thread spawned, put it on the list */
1572         write_lock(&cifs_tcp_ses_lock);
1573         list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
1574         write_unlock(&cifs_tcp_ses_lock);
1575
1576         return tcp_ses;
1577
1578 out_err:
1579         if (tcp_ses) {
1580                 if (!IS_ERR(tcp_ses->hostname))
1581                         kfree(tcp_ses->hostname);
1582                 if (tcp_ses->ssocket)
1583                         sock_release(tcp_ses->ssocket);
1584                 kfree(tcp_ses);
1585         }
1586         return ERR_PTR(rc);
1587 }
1588
1589 static struct cifsSesInfo *
1590 cifs_find_smb_ses(struct TCP_Server_Info *server, char *username)
1591 {
1592         struct list_head *tmp;
1593         struct cifsSesInfo *ses;
1594
1595         write_lock(&cifs_tcp_ses_lock);
1596         list_for_each(tmp, &server->smb_ses_list) {
1597                 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
1598                 if (strncmp(ses->userName, username, MAX_USERNAME_SIZE))
1599                         continue;
1600
1601                 ++ses->ses_count;
1602                 write_unlock(&cifs_tcp_ses_lock);
1603                 return ses;
1604         }
1605         write_unlock(&cifs_tcp_ses_lock);
1606         return NULL;
1607 }
1608
1609 static void
1610 cifs_put_smb_ses(struct cifsSesInfo *ses)
1611 {
1612         int xid;
1613         struct TCP_Server_Info *server = ses->server;
1614
1615         write_lock(&cifs_tcp_ses_lock);
1616         if (--ses->ses_count > 0) {
1617                 write_unlock(&cifs_tcp_ses_lock);
1618                 return;
1619         }
1620
1621         list_del_init(&ses->smb_ses_list);
1622         write_unlock(&cifs_tcp_ses_lock);
1623
1624         if (ses->status == CifsGood) {
1625                 xid = GetXid();
1626                 CIFSSMBLogoff(xid, ses);
1627                 _FreeXid(xid);
1628         }
1629         sesInfoFree(ses);
1630         cifs_put_tcp_session(server);
1631 }
1632
1633 static struct cifsTconInfo *
1634 cifs_find_tcon(struct cifsSesInfo *ses, const char *unc)
1635 {
1636         struct list_head *tmp;
1637         struct cifsTconInfo *tcon;
1638
1639         write_lock(&cifs_tcp_ses_lock);
1640         list_for_each(tmp, &ses->tcon_list) {
1641                 tcon = list_entry(tmp, struct cifsTconInfo, tcon_list);
1642                 if (tcon->tidStatus == CifsExiting)
1643                         continue;
1644                 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
1645                         continue;
1646
1647                 ++tcon->tc_count;
1648                 write_unlock(&cifs_tcp_ses_lock);
1649                 return tcon;
1650         }
1651         write_unlock(&cifs_tcp_ses_lock);
1652         return NULL;
1653 }
1654
1655 static void
1656 cifs_put_tcon(struct cifsTconInfo *tcon)
1657 {
1658         int xid;
1659         struct cifsSesInfo *ses = tcon->ses;
1660
1661         write_lock(&cifs_tcp_ses_lock);
1662         if (--tcon->tc_count > 0) {
1663                 write_unlock(&cifs_tcp_ses_lock);
1664                 return;
1665         }
1666
1667         list_del_init(&tcon->tcon_list);
1668         write_unlock(&cifs_tcp_ses_lock);
1669
1670         xid = GetXid();
1671         CIFSSMBTDis(xid, tcon);
1672         _FreeXid(xid);
1673
1674         tconInfoFree(tcon);
1675         cifs_put_smb_ses(ses);
1676 }
1677
1678 int
1679 get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
1680              const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
1681              struct dfs_info3_param **preferrals, int remap)
1682 {
1683         char *temp_unc;
1684         int rc = 0;
1685
1686         *pnum_referrals = 0;
1687         *preferrals = NULL;
1688
1689         if (pSesInfo->ipc_tid == 0) {
1690                 temp_unc = kmalloc(2 /* for slashes */ +
1691                         strnlen(pSesInfo->serverName,
1692                                 SERVER_NAME_LEN_WITH_NULL * 2)
1693                                  + 1 + 4 /* slash IPC$ */  + 2,
1694                                 GFP_KERNEL);
1695                 if (temp_unc == NULL)
1696                         return -ENOMEM;
1697                 temp_unc[0] = '\\';
1698                 temp_unc[1] = '\\';
1699                 strcpy(temp_unc + 2, pSesInfo->serverName);
1700                 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1701                 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1702                 cFYI(1,
1703                      ("CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid));
1704                 kfree(temp_unc);
1705         }
1706         if (rc == 0)
1707                 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1708                                      pnum_referrals, nls_codepage, remap);
1709         /* BB map targetUNCs to dfs_info3 structures, here or
1710                 in CIFSGetDFSRefer BB */
1711
1712         return rc;
1713 }
1714
1715 #ifdef CONFIG_DEBUG_LOCK_ALLOC
1716 static struct lock_class_key cifs_key[2];
1717 static struct lock_class_key cifs_slock_key[2];
1718
1719 static inline void
1720 cifs_reclassify_socket4(struct socket *sock)
1721 {
1722         struct sock *sk = sock->sk;
1723         BUG_ON(sock_owned_by_user(sk));
1724         sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
1725                 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
1726 }
1727
1728 static inline void
1729 cifs_reclassify_socket6(struct socket *sock)
1730 {
1731         struct sock *sk = sock->sk;
1732         BUG_ON(sock_owned_by_user(sk));
1733         sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
1734                 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
1735 }
1736 #else
1737 static inline void
1738 cifs_reclassify_socket4(struct socket *sock)
1739 {
1740 }
1741
1742 static inline void
1743 cifs_reclassify_socket6(struct socket *sock)
1744 {
1745 }
1746 #endif
1747
1748 /* See RFC1001 section 14 on representation of Netbios names */
1749 static void rfc1002mangle(char *target, char *source, unsigned int length)
1750 {
1751         unsigned int i, j;
1752
1753         for (i = 0, j = 0; i < (length); i++) {
1754                 /* mask a nibble at a time and encode */
1755                 target[j] = 'A' + (0x0F & (source[i] >> 4));
1756                 target[j+1] = 'A' + (0x0F & source[i]);
1757                 j += 2;
1758         }
1759
1760 }
1761
1762
1763 static int
1764 ipv4_connect(struct TCP_Server_Info *server)
1765 {
1766         int rc = 0;
1767         bool connected = false;
1768         __be16 orig_port = 0;
1769         struct socket *socket = server->ssocket;
1770
1771         if (socket == NULL) {
1772                 rc = sock_create_kern(PF_INET, SOCK_STREAM,
1773                                       IPPROTO_TCP, &socket);
1774                 if (rc < 0) {
1775                         cERROR(1, ("Error %d creating socket", rc));
1776                         return rc;
1777                 }
1778
1779                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1780                 cFYI(1, ("Socket created"));
1781                 server->ssocket = socket;
1782                 socket->sk->sk_allocation = GFP_NOFS;
1783                 cifs_reclassify_socket4(socket);
1784         }
1785
1786         /* user overrode default port */
1787         if (server->addr.sockAddr.sin_port) {
1788                 rc = socket->ops->connect(socket, (struct sockaddr *)
1789                                           &server->addr.sockAddr,
1790                                           sizeof(struct sockaddr_in), 0);
1791                 if (rc >= 0)
1792                         connected = true;
1793         }
1794
1795         if (!connected) {
1796                 /* save original port so we can retry user specified port
1797                         later if fall back ports fail this time  */
1798                 orig_port = server->addr.sockAddr.sin_port;
1799
1800                 /* do not retry on the same port we just failed on */
1801                 if (server->addr.sockAddr.sin_port != htons(CIFS_PORT)) {
1802                         server->addr.sockAddr.sin_port = htons(CIFS_PORT);
1803                         rc = socket->ops->connect(socket,
1804                                                 (struct sockaddr *)
1805                                                 &server->addr.sockAddr,
1806                                                 sizeof(struct sockaddr_in), 0);
1807                         if (rc >= 0)
1808                                 connected = true;
1809                 }
1810         }
1811         if (!connected) {
1812                 server->addr.sockAddr.sin_port = htons(RFC1001_PORT);
1813                 rc = socket->ops->connect(socket, (struct sockaddr *)
1814                                               &server->addr.sockAddr,
1815                                               sizeof(struct sockaddr_in), 0);
1816                 if (rc >= 0)
1817                         connected = true;
1818         }
1819
1820         /* give up here - unless we want to retry on different
1821                 protocol families some day */
1822         if (!connected) {
1823                 if (orig_port)
1824                         server->addr.sockAddr.sin_port = orig_port;
1825                 cFYI(1, ("Error %d connecting to server via ipv4", rc));
1826                 sock_release(socket);
1827                 server->ssocket = NULL;
1828                 return rc;
1829         }
1830
1831
1832         /*
1833          * Eventually check for other socket options to change from
1834          *  the default. sock_setsockopt not used because it expects
1835          *  user space buffer
1836          */
1837         socket->sk->sk_rcvtimeo = 7 * HZ;
1838         socket->sk->sk_sndtimeo = 5 * HZ;
1839
1840         /* make the bufsizes depend on wsize/rsize and max requests */
1841         if (server->noautotune) {
1842                 if (socket->sk->sk_sndbuf < (200 * 1024))
1843                         socket->sk->sk_sndbuf = 200 * 1024;
1844                 if (socket->sk->sk_rcvbuf < (140 * 1024))
1845                         socket->sk->sk_rcvbuf = 140 * 1024;
1846         }
1847
1848          cFYI(1, ("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
1849                  socket->sk->sk_sndbuf,
1850                  socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo));
1851
1852         /* send RFC1001 sessinit */
1853         if (server->addr.sockAddr.sin_port == htons(RFC1001_PORT)) {
1854                 /* some servers require RFC1001 sessinit before sending
1855                 negprot - BB check reconnection in case where second
1856                 sessinit is sent but no second negprot */
1857                 struct rfc1002_session_packet *ses_init_buf;
1858                 struct smb_hdr *smb_buf;
1859                 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
1860                                        GFP_KERNEL);
1861                 if (ses_init_buf) {
1862                         ses_init_buf->trailer.session_req.called_len = 32;
1863                         if (server->server_RFC1001_name &&
1864                             server->server_RFC1001_name[0] != 0)
1865                                 rfc1002mangle(ses_init_buf->trailer.
1866                                                 session_req.called_name,
1867                                               server->server_RFC1001_name,
1868                                               RFC1001_NAME_LEN_WITH_NULL);
1869                         else
1870                                 rfc1002mangle(ses_init_buf->trailer.
1871                                                 session_req.called_name,
1872                                               DEFAULT_CIFS_CALLED_NAME,
1873                                               RFC1001_NAME_LEN_WITH_NULL);
1874
1875                         ses_init_buf->trailer.session_req.calling_len = 32;
1876
1877                         /* calling name ends in null (byte 16) from old smb
1878                         convention. */
1879                         if (server->workstation_RFC1001_name &&
1880                             server->workstation_RFC1001_name[0] != 0)
1881                                 rfc1002mangle(ses_init_buf->trailer.
1882                                                 session_req.calling_name,
1883                                               server->workstation_RFC1001_name,
1884                                               RFC1001_NAME_LEN_WITH_NULL);
1885                         else
1886                                 rfc1002mangle(ses_init_buf->trailer.
1887                                                 session_req.calling_name,
1888                                               "LINUX_CIFS_CLNT",
1889                                               RFC1001_NAME_LEN_WITH_NULL);
1890
1891                         ses_init_buf->trailer.session_req.scope1 = 0;
1892                         ses_init_buf->trailer.session_req.scope2 = 0;
1893                         smb_buf = (struct smb_hdr *)ses_init_buf;
1894                         /* sizeof RFC1002_SESSION_REQUEST with no scope */
1895                         smb_buf->smb_buf_length = 0x81000044;
1896                         rc = smb_send(server, smb_buf, 0x44);
1897                         kfree(ses_init_buf);
1898                         msleep(1); /* RFC1001 layer in at least one server
1899                                       requires very short break before negprot
1900                                       presumably because not expecting negprot
1901                                       to follow so fast.  This is a simple
1902                                       solution that works without
1903                                       complicating the code and causes no
1904                                       significant slowing down on mount
1905                                       for everyone else */
1906                 }
1907                 /* else the negprot may still work without this
1908                 even though malloc failed */
1909
1910         }
1911
1912         return rc;
1913 }
1914
1915 static int
1916 ipv6_connect(struct TCP_Server_Info *server)
1917 {
1918         int rc = 0;
1919         bool connected = false;
1920         __be16 orig_port = 0;
1921         struct socket *socket = server->ssocket;
1922
1923         if (socket == NULL) {
1924                 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
1925                                       IPPROTO_TCP, &socket);
1926                 if (rc < 0) {
1927                         cERROR(1, ("Error %d creating ipv6 socket", rc));
1928                         socket = NULL;
1929                         return rc;
1930                 }
1931
1932                 /* BB other socket options to set KEEPALIVE, NODELAY? */
1933                 cFYI(1, ("ipv6 Socket created"));
1934                 server->ssocket = socket;
1935                 socket->sk->sk_allocation = GFP_NOFS;
1936                 cifs_reclassify_socket6(socket);
1937         }
1938
1939         /* user overrode default port */
1940         if (server->addr.sockAddr6.sin6_port) {
1941                 rc = socket->ops->connect(socket,
1942                                 (struct sockaddr *) &server->addr.sockAddr6,
1943                                 sizeof(struct sockaddr_in6), 0);
1944                 if (rc >= 0)
1945                         connected = true;
1946         }
1947
1948         if (!connected) {
1949                 /* save original port so we can retry user specified port
1950                         later if fall back ports fail this time  */
1951
1952                 orig_port = server->addr.sockAddr6.sin6_port;
1953                 /* do not retry on the same port we just failed on */
1954                 if (server->addr.sockAddr6.sin6_port != htons(CIFS_PORT)) {
1955                         server->addr.sockAddr6.sin6_port = htons(CIFS_PORT);
1956                         rc = socket->ops->connect(socket, (struct sockaddr *)
1957                                         &server->addr.sockAddr6,
1958                                         sizeof(struct sockaddr_in6), 0);
1959                         if (rc >= 0)
1960                                 connected = true;
1961                 }
1962         }
1963         if (!connected) {
1964                 server->addr.sockAddr6.sin6_port = htons(RFC1001_PORT);
1965                 rc = socket->ops->connect(socket, (struct sockaddr *)
1966                                 &server->addr.sockAddr6,
1967                                 sizeof(struct sockaddr_in6), 0);
1968                 if (rc >= 0)
1969                         connected = true;
1970         }
1971
1972         /* give up here - unless we want to retry on different
1973                 protocol families some day */
1974         if (!connected) {
1975                 if (orig_port)
1976                         server->addr.sockAddr6.sin6_port = orig_port;
1977                 cFYI(1, ("Error %d connecting to server via ipv6", rc));
1978                 sock_release(socket);
1979                 server->ssocket = NULL;
1980                 return rc;
1981         }
1982
1983         /*
1984          * Eventually check for other socket options to change from
1985          * the default. sock_setsockopt not used because it expects
1986          * user space buffer
1987          */
1988         socket->sk->sk_rcvtimeo = 7 * HZ;
1989         socket->sk->sk_sndtimeo = 5 * HZ;
1990         server->ssocket = socket;
1991
1992         return rc;
1993 }
1994
1995 void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
1996                           struct super_block *sb, struct smb_vol *vol_info)
1997 {
1998         /* if we are reconnecting then should we check to see if
1999          * any requested capabilities changed locally e.g. via
2000          * remount but we can not do much about it here
2001          * if they have (even if we could detect it by the following)
2002          * Perhaps we could add a backpointer to array of sb from tcon
2003          * or if we change to make all sb to same share the same
2004          * sb as NFS - then we only have one backpointer to sb.
2005          * What if we wanted to mount the server share twice once with
2006          * and once without posixacls or posix paths? */
2007         __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
2008
2009         if (vol_info && vol_info->no_linux_ext) {
2010                 tcon->fsUnixInfo.Capability = 0;
2011                 tcon->unix_ext = 0; /* Unix Extensions disabled */
2012                 cFYI(1, ("Linux protocol extensions disabled"));
2013                 return;
2014         } else if (vol_info)
2015                 tcon->unix_ext = 1; /* Unix Extensions supported */
2016
2017         if (tcon->unix_ext == 0) {
2018                 cFYI(1, ("Unix extensions disabled so not set on reconnect"));
2019                 return;
2020         }
2021
2022         if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
2023                 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
2024
2025                 /* check for reconnect case in which we do not
2026                    want to change the mount behavior if we can avoid it */
2027                 if (vol_info == NULL) {
2028                         /* turn off POSIX ACL and PATHNAMES if not set
2029                            originally at mount time */
2030                         if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
2031                                 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
2032                         if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2033                                 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2034                                         cERROR(1, ("POSIXPATH support change"));
2035                                 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2036                         } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2037                                 cERROR(1, ("possible reconnect error"));
2038                                 cERROR(1,
2039                                         ("server disabled POSIX path support"));
2040                         }
2041                 }
2042
2043                 cap &= CIFS_UNIX_CAP_MASK;
2044                 if (vol_info && vol_info->no_psx_acl)
2045                         cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
2046                 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
2047                         cFYI(1, ("negotiated posix acl support"));
2048                         if (sb)
2049                                 sb->s_flags |= MS_POSIXACL;
2050                 }
2051
2052                 if (vol_info && vol_info->posix_paths == 0)
2053                         cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
2054                 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
2055                         cFYI(1, ("negotiate posix pathnames"));
2056                         if (sb)
2057                                 CIFS_SB(sb)->mnt_cifs_flags |=
2058                                         CIFS_MOUNT_POSIX_PATHS;
2059                 }
2060
2061                 /* We might be setting the path sep back to a different
2062                 form if we are reconnecting and the server switched its
2063                 posix path capability for this share */
2064                 if (sb && (CIFS_SB(sb)->prepathlen > 0))
2065                         CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
2066
2067                 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
2068                         if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
2069                                 CIFS_SB(sb)->rsize = 127 * 1024;
2070                                 cFYI(DBG2,
2071                                         ("larger reads not supported by srv"));
2072                         }
2073                 }
2074
2075
2076                 cFYI(1, ("Negotiate caps 0x%x", (int)cap));
2077 #ifdef CONFIG_CIFS_DEBUG2
2078                 if (cap & CIFS_UNIX_FCNTL_CAP)
2079                         cFYI(1, ("FCNTL cap"));
2080                 if (cap & CIFS_UNIX_EXTATTR_CAP)
2081                         cFYI(1, ("EXTATTR cap"));
2082                 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2083                         cFYI(1, ("POSIX path cap"));
2084                 if (cap & CIFS_UNIX_XATTR_CAP)
2085                         cFYI(1, ("XATTR cap"));
2086                 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
2087                         cFYI(1, ("POSIX ACL cap"));
2088                 if (cap & CIFS_UNIX_LARGE_READ_CAP)
2089                         cFYI(1, ("very large read cap"));
2090                 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
2091                         cFYI(1, ("very large write cap"));
2092 #endif /* CIFS_DEBUG2 */
2093                 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
2094                         if (vol_info == NULL) {
2095                                 cFYI(1, ("resetting capabilities failed"));
2096                         } else
2097                                 cERROR(1, ("Negotiating Unix capabilities "
2098                                            "with the server failed.  Consider "
2099                                            "mounting with the Unix Extensions\n"
2100                                            "disabled, if problems are found, "
2101                                            "by specifying the nounix mount "
2102                                            "option."));
2103
2104                 }
2105         }
2106 }
2107
2108 static void
2109 convert_delimiter(char *path, char delim)
2110 {
2111         int i;
2112         char old_delim;
2113
2114         if (path == NULL)
2115                 return;
2116
2117         if (delim == '/')
2118                 old_delim = '\\';
2119         else
2120                 old_delim = '/';
2121
2122         for (i = 0; path[i] != '\0'; i++) {
2123                 if (path[i] == old_delim)
2124                         path[i] = delim;
2125         }
2126 }
2127
2128 static void setup_cifs_sb(struct smb_vol *pvolume_info,
2129                           struct cifs_sb_info *cifs_sb)
2130 {
2131         if (pvolume_info->rsize > CIFSMaxBufSize) {
2132                 cERROR(1, ("rsize %d too large, using MaxBufSize",
2133                         pvolume_info->rsize));
2134                 cifs_sb->rsize = CIFSMaxBufSize;
2135         } else if ((pvolume_info->rsize) &&
2136                         (pvolume_info->rsize <= CIFSMaxBufSize))
2137                 cifs_sb->rsize = pvolume_info->rsize;
2138         else /* default */
2139                 cifs_sb->rsize = CIFSMaxBufSize;
2140
2141         if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
2142                 cERROR(1, ("wsize %d too large, using 4096 instead",
2143                           pvolume_info->wsize));
2144                 cifs_sb->wsize = 4096;
2145         } else if (pvolume_info->wsize)
2146                 cifs_sb->wsize = pvolume_info->wsize;
2147         else
2148                 cifs_sb->wsize = min_t(const int,
2149                                         PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2150                                         127*1024);
2151                 /* old default of CIFSMaxBufSize was too small now
2152                    that SMB Write2 can send multiple pages in kvec.
2153                    RFC1001 does not describe what happens when frame
2154                    bigger than 128K is sent so use that as max in
2155                    conjunction with 52K kvec constraint on arch with 4K
2156                    page size  */
2157
2158         if (cifs_sb->rsize < 2048) {
2159                 cifs_sb->rsize = 2048;
2160                 /* Windows ME may prefer this */
2161                 cFYI(1, ("readsize set to minimum: 2048"));
2162         }
2163         /* calculate prepath */
2164         cifs_sb->prepath = pvolume_info->prepath;
2165         if (cifs_sb->prepath) {
2166                 cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2167                 /* we can not convert the / to \ in the path
2168                 separators in the prefixpath yet because we do not
2169                 know (until reset_cifs_unix_caps is called later)
2170                 whether POSIX PATH CAP is available. We normalize
2171                 the / to \ after reset_cifs_unix_caps is called */
2172                 pvolume_info->prepath = NULL;
2173         } else
2174                 cifs_sb->prepathlen = 0;
2175         cifs_sb->mnt_uid = pvolume_info->linux_uid;
2176         cifs_sb->mnt_gid = pvolume_info->linux_gid;
2177         cifs_sb->mnt_file_mode = pvolume_info->file_mode;
2178         cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
2179         cFYI(1, ("file mode: 0x%x  dir mode: 0x%x",
2180                 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode));
2181
2182         if (pvolume_info->noperm)
2183                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2184         if (pvolume_info->setuids)
2185                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2186         if (pvolume_info->server_ino)
2187                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2188         if (pvolume_info->remap)
2189                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2190         if (pvolume_info->no_xattr)
2191                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2192         if (pvolume_info->sfu_emul)
2193                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2194         if (pvolume_info->nobrl)
2195                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2196         if (pvolume_info->nostrictsync)
2197                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
2198         if (pvolume_info->mand_lock)
2199                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
2200         if (pvolume_info->cifs_acl)
2201                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2202         if (pvolume_info->override_uid)
2203                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2204         if (pvolume_info->override_gid)
2205                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2206         if (pvolume_info->dynperm)
2207                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
2208         if (pvolume_info->direct_io) {
2209                 cFYI(1, ("mounting share using direct i/o"));
2210                 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2211         }
2212
2213         if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
2214                 cERROR(1, ("mount option dynperm ignored if cifsacl "
2215                            "mount option supported"));
2216 }
2217
2218 static int
2219 is_path_accessible(int xid, struct cifsTconInfo *tcon,
2220                    struct cifs_sb_info *cifs_sb, const char *full_path)
2221 {
2222         int rc;
2223         FILE_ALL_INFO *pfile_info;
2224
2225         pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
2226         if (pfile_info == NULL)
2227                 return -ENOMEM;
2228
2229         rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info,
2230                               0 /* not legacy */, cifs_sb->local_nls,
2231                               cifs_sb->mnt_cifs_flags &
2232                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
2233         kfree(pfile_info);
2234         return rc;
2235 }
2236
2237 static void
2238 cleanup_volume_info(struct smb_vol **pvolume_info)
2239 {
2240         struct smb_vol *volume_info;
2241
2242         if (!pvolume_info && !*pvolume_info)
2243                 return;
2244
2245         volume_info = *pvolume_info;
2246         kzfree(volume_info->password);
2247         kfree(volume_info->UNC);
2248         kfree(volume_info->prepath);
2249         kfree(volume_info);
2250         *pvolume_info = NULL;
2251         return;
2252 }
2253
2254 #ifdef CONFIG_CIFS_DFS_UPCALL
2255 /* build_path_to_root returns full path to root when
2256  * we do not have an exiting connection (tcon) */
2257 static char *
2258 build_unc_path_to_root(const struct smb_vol *volume_info,
2259                 const struct cifs_sb_info *cifs_sb)
2260 {
2261         char *full_path;
2262
2263         int unc_len = strnlen(volume_info->UNC, MAX_TREE_SIZE + 1);
2264         full_path = kmalloc(unc_len + cifs_sb->prepathlen + 1, GFP_KERNEL);
2265         if (full_path == NULL)
2266                 return ERR_PTR(-ENOMEM);
2267
2268         strncpy(full_path, volume_info->UNC, unc_len);
2269         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) {
2270                 int i;
2271                 for (i = 0; i < unc_len; i++) {
2272                         if (full_path[i] == '\\')
2273                                 full_path[i] = '/';
2274                 }
2275         }
2276
2277         if (cifs_sb->prepathlen)
2278                 strncpy(full_path + unc_len, cifs_sb->prepath,
2279                                 cifs_sb->prepathlen);
2280
2281         full_path[unc_len + cifs_sb->prepathlen] = 0; /* add trailing null */
2282         return full_path;
2283 }
2284 #endif
2285
2286 int
2287 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
2288                 char *mount_data_global, const char *devname)
2289 {
2290         int rc = 0;
2291         int xid;
2292         struct smb_vol *volume_info;
2293         struct cifsSesInfo *pSesInfo = NULL;
2294         struct cifsTconInfo *tcon = NULL;
2295         struct TCP_Server_Info *srvTcp = NULL;
2296         char   *full_path;
2297         char *mount_data = mount_data_global;
2298 #ifdef CONFIG_CIFS_DFS_UPCALL
2299         struct dfs_info3_param *referrals = NULL;
2300         unsigned int num_referrals = 0;
2301         int referral_walks_count = 0;
2302 try_mount_again:
2303 #endif
2304         full_path = NULL;
2305
2306         xid = GetXid();
2307
2308         volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
2309         if (!volume_info) {
2310                 rc = -ENOMEM;
2311                 goto out;
2312         }
2313
2314         if (cifs_parse_mount_options(mount_data, devname, volume_info)) {
2315                 rc = -EINVAL;
2316                 goto out;
2317         }
2318
2319         if (volume_info->nullauth) {
2320                 cFYI(1, ("null user"));
2321                 volume_info->username = "";
2322         } else if (volume_info->username) {
2323                 /* BB fixme parse for domain name here */
2324                 cFYI(1, ("Username: %s", volume_info->username));
2325         } else {
2326                 cifserror("No username specified");
2327         /* In userspace mount helper we can get user name from alternate
2328            locations such as env variables and files on disk */
2329                 rc = -EINVAL;
2330                 goto out;
2331         }
2332
2333
2334         /* this is needed for ASCII cp to Unicode converts */
2335         if (volume_info->iocharset == NULL) {
2336                 cifs_sb->local_nls = load_nls_default();
2337         /* load_nls_default can not return null */
2338         } else {
2339                 cifs_sb->local_nls = load_nls(volume_info->iocharset);
2340                 if (cifs_sb->local_nls == NULL) {
2341                         cERROR(1, ("CIFS mount error: iocharset %s not found",
2342                                  volume_info->iocharset));
2343                         rc = -ELIBACC;
2344                         goto out;
2345                 }
2346         }
2347
2348         /* get a reference to a tcp session */
2349         srvTcp = cifs_get_tcp_session(volume_info);
2350         if (IS_ERR(srvTcp)) {
2351                 rc = PTR_ERR(srvTcp);
2352                 goto out;
2353         }
2354
2355         pSesInfo = cifs_find_smb_ses(srvTcp, volume_info->username);
2356         if (pSesInfo) {
2357                 cFYI(1, ("Existing smb sess found (status=%d)",
2358                         pSesInfo->status));
2359                 /*
2360                  * The existing SMB session already has a reference to srvTcp,
2361                  * so we can put back the extra one we got before
2362                  */
2363                 cifs_put_tcp_session(srvTcp);
2364
2365                 down(&pSesInfo->sesSem);
2366                 if (pSesInfo->need_reconnect) {
2367                         cFYI(1, ("Session needs reconnect"));
2368                         rc = cifs_setup_session(xid, pSesInfo,
2369                                                 cifs_sb->local_nls);
2370                 }
2371                 up(&pSesInfo->sesSem);
2372         } else if (!rc) {
2373                 cFYI(1, ("Existing smb sess not found"));
2374                 pSesInfo = sesInfoAlloc();
2375                 if (pSesInfo == NULL) {
2376                         rc = -ENOMEM;
2377                         goto mount_fail_check;
2378                 }
2379
2380                 /* new SMB session uses our srvTcp ref */
2381                 pSesInfo->server = srvTcp;
2382                 if (srvTcp->addr.sockAddr6.sin6_family == AF_INET6)
2383                         sprintf(pSesInfo->serverName, "%pI6",
2384                                 &srvTcp->addr.sockAddr6.sin6_addr);
2385                 else
2386                         sprintf(pSesInfo->serverName, "%pI4",
2387                                 &srvTcp->addr.sockAddr.sin_addr.s_addr);
2388
2389                 write_lock(&cifs_tcp_ses_lock);
2390                 list_add(&pSesInfo->smb_ses_list, &srvTcp->smb_ses_list);
2391                 write_unlock(&cifs_tcp_ses_lock);
2392
2393                 /* volume_info->password freed at unmount */
2394                 if (volume_info->password) {
2395                         pSesInfo->password = kstrdup(volume_info->password,
2396                                                      GFP_KERNEL);
2397                         if (!pSesInfo->password) {
2398                                 rc = -ENOMEM;
2399                                 goto mount_fail_check;
2400                         }
2401                 }
2402                 if (volume_info->username)
2403                         strncpy(pSesInfo->userName, volume_info->username,
2404                                 MAX_USERNAME_SIZE);
2405                 if (volume_info->domainname) {
2406                         int len = strlen(volume_info->domainname);
2407                         pSesInfo->domainName = kmalloc(len + 1, GFP_KERNEL);
2408                         if (pSesInfo->domainName)
2409                                 strcpy(pSesInfo->domainName,
2410                                         volume_info->domainname);
2411                 }
2412                 pSesInfo->linux_uid = volume_info->linux_uid;
2413                 pSesInfo->overrideSecFlg = volume_info->secFlg;
2414                 down(&pSesInfo->sesSem);
2415
2416                 /* BB FIXME need to pass vol->secFlgs BB */
2417                 rc = cifs_setup_session(xid, pSesInfo,
2418                                         cifs_sb->local_nls);
2419                 up(&pSesInfo->sesSem);
2420         }
2421
2422         /* search for existing tcon to this server share */
2423         if (!rc) {
2424                 setup_cifs_sb(volume_info, cifs_sb);
2425
2426                 tcon = cifs_find_tcon(pSesInfo, volume_info->UNC);
2427                 if (tcon) {
2428                         cFYI(1, ("Found match on UNC path"));
2429                         /* existing tcon already has a reference */
2430                         cifs_put_smb_ses(pSesInfo);
2431                         if (tcon->seal != volume_info->seal)
2432                                 cERROR(1, ("transport encryption setting "
2433                                            "conflicts with existing tid"));
2434                 } else {
2435                         tcon = tconInfoAlloc();
2436                         if (tcon == NULL) {
2437                                 rc = -ENOMEM;
2438                                 goto mount_fail_check;
2439                         }
2440
2441                         tcon->ses = pSesInfo;
2442                         if (volume_info->password) {
2443                                 tcon->password = kstrdup(volume_info->password,
2444                                                          GFP_KERNEL);
2445                                 if (!tcon->password) {
2446                                         rc = -ENOMEM;
2447                                         goto mount_fail_check;
2448                                 }
2449                         }
2450
2451                         if ((strchr(volume_info->UNC + 3, '\\') == NULL)
2452                             && (strchr(volume_info->UNC + 3, '/') == NULL)) {
2453                                 cERROR(1, ("Missing share name"));
2454                                 rc = -ENODEV;
2455                                 goto mount_fail_check;
2456                         } else {
2457                                 /* BB Do we need to wrap sesSem around
2458                                  * this TCon call and Unix SetFS as
2459                                  * we do on SessSetup and reconnect? */
2460                                 rc = CIFSTCon(xid, pSesInfo, volume_info->UNC,
2461                                               tcon, cifs_sb->local_nls);
2462                                 cFYI(1, ("CIFS Tcon rc = %d", rc));
2463                                 if (volume_info->nodfs) {
2464                                         tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
2465                                         cFYI(1, ("DFS disabled (%d)",
2466                                                 tcon->Flags));
2467                                 }
2468                         }
2469                         if (rc)
2470                                 goto remote_path_check;
2471                         tcon->seal = volume_info->seal;
2472                         write_lock(&cifs_tcp_ses_lock);
2473                         list_add(&tcon->tcon_list, &pSesInfo->tcon_list);
2474                         write_unlock(&cifs_tcp_ses_lock);
2475                 }
2476
2477                 /* we can have only one retry value for a connection
2478                    to a share so for resources mounted more than once
2479                    to the same server share the last value passed in
2480                    for the retry flag is used */
2481                 tcon->retry = volume_info->retry;
2482                 tcon->nocase = volume_info->nocase;
2483                 tcon->local_lease = volume_info->local_lease;
2484         }
2485         if (pSesInfo) {
2486                 if (pSesInfo->capabilities & CAP_LARGE_FILES)
2487                         sb->s_maxbytes = MAX_LFS_FILESIZE;
2488                 else
2489                         sb->s_maxbytes = MAX_NON_LFS;
2490         }
2491
2492         /* BB FIXME fix time_gran to be larger for LANMAN sessions */
2493         sb->s_time_gran = 100;
2494
2495         if (rc)
2496                 goto remote_path_check;
2497
2498         cifs_sb->tcon = tcon;
2499
2500         /* do not care if following two calls succeed - informational */
2501         if (!tcon->ipc) {
2502                 CIFSSMBQFSDeviceInfo(xid, tcon);
2503                 CIFSSMBQFSAttributeInfo(xid, tcon);
2504         }
2505
2506         /* tell server which Unix caps we support */
2507         if (tcon->ses->capabilities & CAP_UNIX)
2508                 /* reset of caps checks mount to see if unix extensions
2509                    disabled for just this mount */
2510                 reset_cifs_unix_caps(xid, tcon, sb, volume_info);
2511         else
2512                 tcon->unix_ext = 0; /* server does not support them */
2513
2514         /* convert forward to back slashes in prepath here if needed */
2515         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2516                 convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb));
2517
2518         if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2519                 cifs_sb->rsize = 1024 * 127;
2520                 cFYI(DBG2, ("no very large read support, rsize now 127K"));
2521         }
2522         if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2523                 cifs_sb->wsize = min(cifs_sb->wsize,
2524                                (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2525         if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2526                 cifs_sb->rsize = min(cifs_sb->rsize,
2527                                (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2528
2529 remote_path_check:
2530         /* check if a whole path (including prepath) is not remote */
2531         if (!rc && cifs_sb->prepathlen && tcon) {
2532                 /* build_path_to_root works only when we have a valid tcon */
2533                 full_path = cifs_build_path_to_root(cifs_sb);
2534                 if (full_path == NULL) {
2535                         rc = -ENOMEM;
2536                         goto mount_fail_check;
2537                 }
2538                 rc = is_path_accessible(xid, tcon, cifs_sb, full_path);
2539                 if (rc != -EREMOTE) {
2540                         kfree(full_path);
2541                         goto mount_fail_check;
2542                 }
2543                 kfree(full_path);
2544         }
2545
2546         /* get referral if needed */
2547         if (rc == -EREMOTE) {
2548 #ifdef CONFIG_CIFS_DFS_UPCALL
2549                 if (referral_walks_count > MAX_NESTED_LINKS) {
2550                         /*
2551                          * BB: when we implement proper loop detection,
2552                          *     we will remove this check. But now we need it
2553                          *     to prevent an indefinite loop if 'DFS tree' is
2554                          *     misconfigured (i.e. has loops).
2555                          */
2556                         rc = -ELOOP;
2557                         goto mount_fail_check;
2558                 }
2559                 /* convert forward to back slashes in prepath here if needed */
2560                 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2561                         convert_delimiter(cifs_sb->prepath,
2562                                         CIFS_DIR_SEP(cifs_sb));
2563                 full_path = build_unc_path_to_root(volume_info, cifs_sb);
2564                 if (IS_ERR(full_path)) {
2565                         rc = PTR_ERR(full_path);
2566                         goto mount_fail_check;
2567                 }
2568
2569                 cFYI(1, ("Getting referral for: %s", full_path));
2570                 rc = get_dfs_path(xid, pSesInfo , full_path + 1,
2571                         cifs_sb->local_nls, &num_referrals, &referrals,
2572                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
2573                 if (!rc && num_referrals > 0) {
2574                         char *fake_devname = NULL;
2575
2576                         if (mount_data != mount_data_global)
2577                                 kfree(mount_data);
2578
2579                         mount_data = cifs_compose_mount_options(
2580                                         cifs_sb->mountdata, full_path + 1,
2581                                         referrals, &fake_devname);
2582
2583                         free_dfs_info_array(referrals, num_referrals);
2584                         kfree(fake_devname);
2585                         kfree(full_path);
2586
2587                         if (IS_ERR(mount_data)) {
2588                                 rc = PTR_ERR(mount_data);
2589                                 mount_data = NULL;
2590                                 goto mount_fail_check;
2591                         }
2592
2593                         if (tcon)
2594                                 cifs_put_tcon(tcon);
2595                         else if (pSesInfo)
2596                                 cifs_put_smb_ses(pSesInfo);
2597
2598                         cleanup_volume_info(&volume_info);
2599                         referral_walks_count++;
2600                         goto try_mount_again;
2601                 }
2602 #else /* No DFS support, return error on mount */
2603                 rc = -EOPNOTSUPP;
2604 #endif
2605         }
2606
2607 mount_fail_check:
2608         /* on error free sesinfo and tcon struct if needed */
2609         if (rc) {
2610                 if (mount_data != mount_data_global)
2611                         kfree(mount_data);
2612                 /* If find_unc succeeded then rc == 0 so we can not end */
2613                 /* up accidently freeing someone elses tcon struct */
2614                 if (tcon)
2615                         cifs_put_tcon(tcon);
2616                 else if (pSesInfo)
2617                         cifs_put_smb_ses(pSesInfo);
2618                 else
2619                         cifs_put_tcp_session(srvTcp);
2620                 goto out;
2621         }
2622
2623         /* volume_info->password is freed above when existing session found
2624         (in which case it is not needed anymore) but when new sesion is created
2625         the password ptr is put in the new session structure (in which case the
2626         password will be freed at unmount time) */
2627 out:
2628         /* zero out password before freeing */
2629         cleanup_volume_info(&volume_info);
2630         FreeXid(xid);
2631         return rc;
2632 }
2633
2634 int
2635 CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
2636          const char *tree, struct cifsTconInfo *tcon,
2637          const struct nls_table *nls_codepage)
2638 {
2639         struct smb_hdr *smb_buffer;
2640         struct smb_hdr *smb_buffer_response;
2641         TCONX_REQ *pSMB;
2642         TCONX_RSP *pSMBr;
2643         unsigned char *bcc_ptr;
2644         int rc = 0;
2645         int length, bytes_left;
2646         __u16 count;
2647
2648         if (ses == NULL)
2649                 return -EIO;
2650
2651         smb_buffer = cifs_buf_get();
2652         if (smb_buffer == NULL)
2653                 return -ENOMEM;
2654
2655         smb_buffer_response = smb_buffer;
2656
2657         header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
2658                         NULL /*no tid */ , 4 /*wct */ );
2659
2660         smb_buffer->Mid = GetNextMid(ses->server);
2661         smb_buffer->Uid = ses->Suid;
2662         pSMB = (TCONX_REQ *) smb_buffer;
2663         pSMBr = (TCONX_RSP *) smb_buffer_response;
2664
2665         pSMB->AndXCommand = 0xFF;
2666         pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
2667         bcc_ptr = &pSMB->Password[0];
2668         if ((ses->server->secMode) & SECMODE_USER) {
2669                 pSMB->PasswordLength = cpu_to_le16(1);  /* minimum */
2670                 *bcc_ptr = 0; /* password is null byte */
2671                 bcc_ptr++;              /* skip password */
2672                 /* already aligned so no need to do it below */
2673         } else {
2674                 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
2675                 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
2676                    specified as required (when that support is added to
2677                    the vfs in the future) as only NTLM or the much
2678                    weaker LANMAN (which we do not send by default) is accepted
2679                    by Samba (not sure whether other servers allow
2680                    NTLMv2 password here) */
2681 #ifdef CONFIG_CIFS_WEAK_PW_HASH
2682                 if ((extended_security & CIFSSEC_MAY_LANMAN) &&
2683                     (ses->server->secType == LANMAN))
2684                         calc_lanman_hash(tcon->password, ses->server->cryptKey,
2685                                          ses->server->secMode &
2686                                             SECMODE_PW_ENCRYPT ? true : false,
2687                                          bcc_ptr);
2688                 else
2689 #endif /* CIFS_WEAK_PW_HASH */
2690                 SMBNTencrypt(tcon->password, ses->server->cryptKey,
2691                              bcc_ptr);
2692
2693                 bcc_ptr += CIFS_SESS_KEY_SIZE;
2694                 if (ses->capabilities & CAP_UNICODE) {
2695                         /* must align unicode strings */
2696                         *bcc_ptr = 0; /* null byte password */
2697                         bcc_ptr++;
2698                 }
2699         }
2700
2701         if (ses->server->secMode &
2702                         (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
2703                 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2704
2705         if (ses->capabilities & CAP_STATUS32) {
2706                 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2707         }
2708         if (ses->capabilities & CAP_DFS) {
2709                 smb_buffer->Flags2 |= SMBFLG2_DFS;
2710         }
2711         if (ses->capabilities & CAP_UNICODE) {
2712                 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2713                 length =
2714                     cifs_strtoUCS((__le16 *) bcc_ptr, tree,
2715                         6 /* max utf8 char length in bytes */ *
2716                         (/* server len*/ + 256 /* share len */), nls_codepage);
2717                 bcc_ptr += 2 * length;  /* convert num 16 bit words to bytes */
2718                 bcc_ptr += 2;   /* skip trailing null */
2719         } else {                /* ASCII */
2720                 strcpy(bcc_ptr, tree);
2721                 bcc_ptr += strlen(tree) + 1;
2722         }
2723         strcpy(bcc_ptr, "?????");
2724         bcc_ptr += strlen("?????");
2725         bcc_ptr += 1;
2726         count = bcc_ptr - &pSMB->Password[0];
2727         pSMB->hdr.smb_buf_length += count;
2728         pSMB->ByteCount = cpu_to_le16(count);
2729
2730         rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
2731                          CIFS_STD_OP);
2732
2733         /* above now done in SendReceive */
2734         if ((rc == 0) && (tcon != NULL)) {
2735                 bool is_unicode;
2736
2737                 tcon->tidStatus = CifsGood;
2738                 tcon->need_reconnect = false;
2739                 tcon->tid = smb_buffer_response->Tid;
2740                 bcc_ptr = pByteArea(smb_buffer_response);
2741                 bytes_left = BCC(smb_buffer_response);
2742                 length = strnlen(bcc_ptr, bytes_left - 2);
2743                 if (smb_buffer->Flags2 & SMBFLG2_UNICODE)
2744                         is_unicode = true;
2745                 else
2746                         is_unicode = false;
2747
2748
2749                 /* skip service field (NB: this field is always ASCII) */
2750                 if (length == 3) {
2751                         if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
2752                             (bcc_ptr[2] == 'C')) {
2753                                 cFYI(1, ("IPC connection"));
2754                                 tcon->ipc = 1;
2755                         }
2756                 } else if (length == 2) {
2757                         if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
2758                                 /* the most common case */
2759                                 cFYI(1, ("disk share connection"));
2760                         }
2761                 }
2762                 bcc_ptr += length + 1;
2763                 bytes_left -= (length + 1);
2764                 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
2765
2766                 /* mostly informational -- no need to fail on error here */
2767                 kfree(tcon->nativeFileSystem);
2768                 tcon->nativeFileSystem = cifs_strndup_from_ucs(bcc_ptr,
2769                                                       bytes_left, is_unicode,
2770                                                       nls_codepage);
2771
2772                 cFYI(1, ("nativeFileSystem=%s", tcon->nativeFileSystem));
2773
2774                 if ((smb_buffer_response->WordCount == 3) ||
2775                          (smb_buffer_response->WordCount == 7))
2776                         /* field is in same location */
2777                         tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
2778                 else
2779                         tcon->Flags = 0;
2780                 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
2781         } else if ((rc == 0) && tcon == NULL) {
2782                 /* all we need to save for IPC$ connection */
2783                 ses->ipc_tid = smb_buffer_response->Tid;
2784         }
2785
2786         cifs_buf_release(smb_buffer);
2787         return rc;
2788 }
2789
2790 int
2791 cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
2792 {
2793         int rc = 0;
2794         char *tmp;
2795
2796         if (cifs_sb->tcon)
2797                 cifs_put_tcon(cifs_sb->tcon);
2798
2799         cifs_sb->tcon = NULL;
2800         tmp = cifs_sb->prepath;
2801         cifs_sb->prepathlen = 0;
2802         cifs_sb->prepath = NULL;
2803         kfree(tmp);
2804
2805         return rc;
2806 }
2807
2808 int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
2809                                            struct nls_table *nls_info)
2810 {
2811         int rc = 0;
2812         int first_time = 0;
2813         struct TCP_Server_Info *server = pSesInfo->server;
2814
2815         /* what if server changes its buffer size after dropping the session? */
2816         if (server->maxBuf == 0) /* no need to send on reconnect */ {
2817                 rc = CIFSSMBNegotiate(xid, pSesInfo);
2818                 if (rc == -EAGAIN) {
2819                         /* retry only once on 1st time connection */
2820                         rc = CIFSSMBNegotiate(xid, pSesInfo);
2821                         if (rc == -EAGAIN)
2822                                 rc = -EHOSTDOWN;
2823                 }
2824                 if (rc == 0) {
2825                         spin_lock(&GlobalMid_Lock);
2826                         if (server->tcpStatus != CifsExiting)
2827                                 server->tcpStatus = CifsGood;
2828                         else
2829                                 rc = -EHOSTDOWN;
2830                         spin_unlock(&GlobalMid_Lock);
2831
2832                 }
2833                 first_time = 1;
2834         }
2835
2836         if (rc)
2837                 goto ss_err_exit;
2838
2839         pSesInfo->flags = 0;
2840         pSesInfo->capabilities = server->capabilities;
2841         if (linuxExtEnabled == 0)
2842                 pSesInfo->capabilities &= (~CAP_UNIX);
2843
2844         cFYI(1, ("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
2845                  server->secMode, server->capabilities, server->timeAdj));
2846
2847         rc = CIFS_SessSetup(xid, pSesInfo, first_time, nls_info);
2848         if (rc) {
2849                 cERROR(1, ("Send error in SessSetup = %d", rc));
2850         } else {
2851                 cFYI(1, ("CIFS Session Established successfully"));
2852                 spin_lock(&GlobalMid_Lock);
2853                 pSesInfo->status = CifsGood;
2854                 pSesInfo->need_reconnect = false;
2855                 spin_unlock(&GlobalMid_Lock);
2856         }
2857
2858 ss_err_exit:
2859         return rc;
2860 }
2861