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Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6
[deliverable/linux.git] / fs / cifs / connect.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/cifs/connect.c
3 *
366781c1 4 * Copyright (C) International Business Machines Corp., 2002,2008
1da177e4
LT		 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
fb8c4b14 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1da177e4
LT		 20 */
21#include <linux/fs.h>
22#include <linux/net.h>
23#include <linux/string.h>
24#include <linux/list.h>
25#include <linux/wait.h>
26#include <linux/ipv6.h>
27#include <linux/pagemap.h>
28#include <linux/ctype.h>
29#include <linux/utsname.h>
30#include <linux/mempool.h>
b8643e1b 31#include <linux/delay.h>
f191401f 32#include <linux/completion.h>
aaf737ad 33#include <linux/kthread.h>
0ae0efad 34#include <linux/pagevec.h>
7dfb7103 35#include <linux/freezer.h>
1da177e4
LT		 36#include <asm/uaccess.h>
37#include <asm/processor.h>
38#include "cifspdu.h"
39#include "cifsglob.h"
40#include "cifsproto.h"
41#include "cifs_unicode.h"
42#include "cifs_debug.h"
43#include "cifs_fs_sb.h"
44#include "ntlmssp.h"
45#include "nterr.h"
46#include "rfc1002pdu.h"
a2653eba 47#include "cn_cifs.h"
1da177e4
LT		 48
49#define CIFS_PORT 445
50#define RFC1001_PORT 139
51
1da177e4
LT		 52extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
53 unsigned char *p24);
54
55extern mempool_t *cifs_req_poolp;
56
57struct smb_vol {
58 char *username;
59 char *password;
60 char *domainname;
61 char *UNC;
62 char *UNCip;
95b1cb90 63 char *in6_addr; /* ipv6 address as human readable form of in6_addr */
1da177e4
LT		 64 char *iocharset; /* local code page for mapping to and from Unicode */
65 char source_rfc1001_name[16]; /* netbios name of client */
a10faeb2 66 char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
1da177e4
LT		 67 uid_t linux_uid;
68 gid_t linux_gid;
69 mode_t file_mode;
70 mode_t dir_mode;
189acaae 71 unsigned secFlg;
4b18f2a9
SF		 72 bool rw:1;
73 bool retry:1;
74 bool intr:1;
75 bool setuids:1;
76 bool override_uid:1;
77 bool override_gid:1;
d0a9c078 78 bool dynperm:1;
4b18f2a9
SF		 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;
95b1cb90
SF		 85 bool remap:1; /* set to remap seven reserved chars in filenames */
86 bool posix_paths:1; /* unset to not ask for posix pathnames. */
4b18f2a9
SF		 87 bool no_linux_ext:1;
88 bool sfu_emul:1;
95b1cb90
SF		 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 */
13a6e42a 92 bool mand_lock:1; /* send mandatory not posix byte range lock reqs */
95b1cb90 93 bool seal:1; /* request transport encryption on share */
84210e91
SF		 94 bool nodfs:1; /* Do not request DFS, even if available */
95 bool local_lease:1; /* check leases only on local system, not remote */
edf1ae40
SF		 96 bool noblocksnd:1;
97 bool noautotune:1;
1da177e4
LT		 98 unsigned int rsize;
99 unsigned int wsize;
100 unsigned int sockopt;
101 unsigned short int port;
fb8c4b14 102 char *prepath;
1da177e4
LT		 103};
104
bcf4b106 105static int ipv4_connect(struct TCP_Server_Info *server);
d5c5605c 106static int ipv6_connect(struct TCP_Server_Info *server);
1da177e4 107
d5c5605c
JL		 108/*
109 * cifs tcp session reconnection
110 *
111 * mark tcp session as reconnecting so temporarily locked
112 * mark all smb sessions as reconnecting for tcp session
113 * reconnect tcp session
114 * wake up waiters on reconnection? - (not needed currently)
115 */
2cd646a2 116static int
1da177e4
LT		 117cifs_reconnect(struct TCP_Server_Info *server)
118{
119 int rc = 0;
f1987b44 120 struct list_head *tmp, *tmp2;
1da177e4
LT		 121 struct cifsSesInfo *ses;
122 struct cifsTconInfo *tcon;
fb8c4b14 123 struct mid_q_entry *mid_entry;
50c2f753 124
1da177e4 125 spin_lock(&GlobalMid_Lock);
469ee614 126 if (server->tcpStatus == CifsExiting) {
fb8c4b14 127 /* the demux thread will exit normally
1da177e4
LT		 128 next time through the loop */
129 spin_unlock(&GlobalMid_Lock);
130 return rc;
131 } else
132 server->tcpStatus = CifsNeedReconnect;
133 spin_unlock(&GlobalMid_Lock);
134 server->maxBuf = 0;
135
e4eb295d 136 cFYI(1, ("Reconnecting tcp session"));
1da177e4
LT		 137
138 /* before reconnecting the tcp session, mark the smb session (uid)
139 and the tid bad so they are not used until reconnected */
14fbf50d
JL		 140 read_lock(&cifs_tcp_ses_lock);
141 list_for_each(tmp, &server->smb_ses_list) {
142 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
143 ses->need_reconnect = true;
144 ses->ipc_tid = 0;
f1987b44
JL		 145 list_for_each(tmp2, &ses->tcon_list) {
146 tcon = list_entry(tmp2, struct cifsTconInfo, tcon_list);
3b795210 147 tcon->need_reconnect = true;
1da177e4 148 }
1da177e4 149 }
f1987b44 150 read_unlock(&cifs_tcp_ses_lock);
1da177e4 151 /* do not want to be sending data on a socket we are freeing */
72ca545b 152 mutex_lock(&server->srv_mutex);
fb8c4b14 153 if (server->ssocket) {
467a8f8d 154 cFYI(1, ("State: 0x%x Flags: 0x%lx", server->ssocket->state,
1da177e4 155 server->ssocket->flags));
91cf45f0 156 kernel_sock_shutdown(server->ssocket, SHUT_WR);
fb8c4b14 157 cFYI(1, ("Post shutdown state: 0x%x Flags: 0x%lx",
467a8f8d 158 server->ssocket->state,
1da177e4
LT		 159 server->ssocket->flags));
160 sock_release(server->ssocket);
161 server->ssocket = NULL;
162 }
163
164 spin_lock(&GlobalMid_Lock);
165 list_for_each(tmp, &server->pending_mid_q) {
166 mid_entry = list_entry(tmp, struct
167 mid_q_entry,
168 qhead);
ad8b15f0 169 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
09d1db5c
SF		 170 /* Mark other intransit requests as needing
171 retry so we do not immediately mark the
172 session bad again (ie after we reconnect
173 below) as they timeout too */
ad8b15f0 174 mid_entry->midState = MID_RETRY_NEEDED;
1da177e4
LT		 175 }
176 }
177 spin_unlock(&GlobalMid_Lock);
72ca545b 178 mutex_unlock(&server->srv_mutex);
1da177e4 179
469ee614
JL		 180 while ((server->tcpStatus != CifsExiting) &&
181 (server->tcpStatus != CifsGood)) {
6c3d8909 182 try_to_freeze();
bcf4b106 183 if (server->addr.sockAddr6.sin6_family == AF_INET6)
d5c5605c 184 rc = ipv6_connect(server);
bcf4b106
JL		 185 else
186 rc = ipv4_connect(server);
fb8c4b14
SF		 187 if (rc) {
188 cFYI(1, ("reconnect error %d", rc));
0cb766ae 189 msleep(3000);
1da177e4
LT		 190 } else {
191 atomic_inc(&tcpSesReconnectCount);
192 spin_lock(&GlobalMid_Lock);
469ee614 193 if (server->tcpStatus != CifsExiting)
1da177e4 194 server->tcpStatus = CifsGood;
ad009ac9 195 server->sequence_number = 0;
fb8c4b14 196 spin_unlock(&GlobalMid_Lock);
1da177e4
LT		 197 /* atomic_set(&server->inFlight,0);*/
198 wake_up(&server->response_q);
199 }
200 }
201 return rc;
202}
203
fb8c4b14 204/*
e4eb295d
SF		 205 return codes:
206 0 not a transact2, or all data present
207 >0 transact2 with that much data missing
208 -EINVAL = invalid transact2
209
210 */
fb8c4b14 211static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize)
e4eb295d 212{
fb8c4b14
SF		 213 struct smb_t2_rsp *pSMBt;
214 int total_data_size;
e4eb295d
SF		 215 int data_in_this_rsp;
216 int remaining;
217
fb8c4b14 218 if (pSMB->Command != SMB_COM_TRANSACTION2)
e4eb295d
SF		 219 return 0;
220
fb8c4b14
SF		 221 /* check for plausible wct, bcc and t2 data and parm sizes */
222 /* check for parm and data offset going beyond end of smb */
223 if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
467a8f8d 224 cFYI(1, ("invalid transact2 word count"));
e4eb295d
SF		 225 return -EINVAL;
226 }
227
228 pSMBt = (struct smb_t2_rsp *)pSMB;
229
230 total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
231 data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);
232
233 remaining = total_data_size - data_in_this_rsp;
234
fb8c4b14 235 if (remaining == 0)
e4eb295d 236 return 0;
fb8c4b14 237 else if (remaining < 0) {
467a8f8d 238 cFYI(1, ("total data %d smaller than data in frame %d",
e4eb295d
SF		 239 total_data_size, data_in_this_rsp));
240 return -EINVAL;
241 } else {
467a8f8d 242 cFYI(1, ("missing %d bytes from transact2, check next response",
e4eb295d 243 remaining));
fb8c4b14
SF		 244 if (total_data_size > maxBufSize) {
245 cERROR(1, ("TotalDataSize %d is over maximum buffer %d",
246 total_data_size, maxBufSize));
247 return -EINVAL;
e4eb295d
SF		 248 }
249 return remaining;
250 }
251}
252
fb8c4b14 253static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB)
e4eb295d
SF		 254{
255 struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
256 struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB;
257 int total_data_size;
258 int total_in_buf;
259 int remaining;
260 int total_in_buf2;
fb8c4b14
SF		 261 char *data_area_of_target;
262 char *data_area_of_buf2;
e4eb295d
SF		 263 __u16 byte_count;
264
265 total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
266
fb8c4b14 267 if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
63135e08 268 cFYI(1, ("total data size of primary and secondary t2 differ"));
e4eb295d
SF		 269 }
270
271 total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);
272
273 remaining = total_data_size - total_in_buf;
50c2f753 274
fb8c4b14 275 if (remaining < 0)
e4eb295d
SF		 276 return -EINVAL;
277
fb8c4b14 278 if (remaining == 0) /* nothing to do, ignore */
e4eb295d 279 return 0;
50c2f753 280
e4eb295d 281 total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
fb8c4b14 282 if (remaining < total_in_buf2) {
467a8f8d 283 cFYI(1, ("transact2 2nd response contains too much data"));
e4eb295d
SF		 284 }
285
286 /* find end of first SMB data area */
fb8c4b14 287 data_area_of_target = (char *)&pSMBt->hdr.Protocol +
e4eb295d
SF		 288 le16_to_cpu(pSMBt->t2_rsp.DataOffset);
289 /* validate target area */
290
291 data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
fb8c4b14 292 le16_to_cpu(pSMB2->t2_rsp.DataOffset);
e4eb295d
SF		 293
294 data_area_of_target += total_in_buf;
295
296 /* copy second buffer into end of first buffer */
fb8c4b14 297 memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2);
e4eb295d
SF		 298 total_in_buf += total_in_buf2;
299 pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
300 byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
301 byte_count += total_in_buf2;
302 BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);
303
70ca734a 304 byte_count = pTargetSMB->smb_buf_length;
e4eb295d
SF		 305 byte_count += total_in_buf2;
306
307 /* BB also add check that we are not beyond maximum buffer size */
50c2f753 308
70ca734a 309 pTargetSMB->smb_buf_length = byte_count;
e4eb295d 310
fb8c4b14 311 if (remaining == total_in_buf2) {
467a8f8d 312 cFYI(1, ("found the last secondary response"));
e4eb295d
SF		 313 return 0; /* we are done */
314 } else /* more responses to go */
315 return 1;
316
317}
318
1da177e4
LT		 319static int
320cifs_demultiplex_thread(struct TCP_Server_Info *server)
321{
322 int length;
323 unsigned int pdu_length, total_read;
324 struct smb_hdr *smb_buffer = NULL;
b8643e1b
SF		 325 struct smb_hdr *bigbuf = NULL;
326 struct smb_hdr *smallbuf = NULL;
1da177e4
LT		 327 struct msghdr smb_msg;
328 struct kvec iov;
329 struct socket *csocket = server->ssocket;
330 struct list_head *tmp;
331 struct cifsSesInfo *ses;
332 struct task_struct *task_to_wake = NULL;
333 struct mid_q_entry *mid_entry;
70ca734a 334 char temp;
4b18f2a9
SF		 335 bool isLargeBuf = false;
336 bool isMultiRsp;
e4eb295d 337 int reconnect;
1da177e4 338
1da177e4 339 current->flags |= PF_MEMALLOC;
ba25f9dc 340 cFYI(1, ("Demultiplex PID: %d", task_pid_nr(current)));
93d0ec85
JL		 341
342 length = atomic_inc_return(&tcpSesAllocCount);
343 if (length > 1)
26f57364
SF		 344 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
345 GFP_KERNEL);
1da177e4 346
83144186 347 set_freezable();
469ee614 348 while (server->tcpStatus != CifsExiting) {
ede1327e
SF		 349 if (try_to_freeze())
350 continue;
b8643e1b
SF		 351 if (bigbuf == NULL) {
352 bigbuf = cifs_buf_get();
0fd1ffe0
PM		 353 if (!bigbuf) {
354 cERROR(1, ("No memory for large SMB response"));
b8643e1b
SF		 355 msleep(3000);
356 /* retry will check if exiting */
357 continue;
358 }
0fd1ffe0
PM		 359 } else if (isLargeBuf) {
360 /* we are reusing a dirty large buf, clear its start */
26f57364 361 memset(bigbuf, 0, sizeof(struct smb_hdr));
1da177e4 362 }
b8643e1b
SF		 363
364 if (smallbuf == NULL) {
365 smallbuf = cifs_small_buf_get();
0fd1ffe0
PM		 366 if (!smallbuf) {
367 cERROR(1, ("No memory for SMB response"));
b8643e1b
SF		 368 msleep(1000);
369 /* retry will check if exiting */
370 continue;
371 }
372 /* beginning of smb buffer is cleared in our buf_get */
373 } else /* if existing small buf clear beginning */
26f57364 374 memset(smallbuf, 0, sizeof(struct smb_hdr));
b8643e1b 375
4b18f2a9
SF		 376 isLargeBuf = false;
377 isMultiRsp = false;
b8643e1b 378 smb_buffer = smallbuf;
1da177e4
LT		 379 iov.iov_base = smb_buffer;
380 iov.iov_len = 4;
381 smb_msg.msg_control = NULL;
382 smb_msg.msg_controllen = 0;
f01d5e14
SF		 383 pdu_length = 4; /* enough to get RFC1001 header */
384incomplete_rcv:
1da177e4
LT		 385 length =
386 kernel_recvmsg(csocket, &smb_msg,
f01d5e14 387 &iov, 1, pdu_length, 0 /* BB other flags? */);
1da177e4 388
469ee614 389 if (server->tcpStatus == CifsExiting) {
1da177e4
LT		 390 break;
391 } else if (server->tcpStatus == CifsNeedReconnect) {
0fd1ffe0 392 cFYI(1, ("Reconnect after server stopped responding"));
1da177e4 393 cifs_reconnect(server);
0fd1ffe0 394 cFYI(1, ("call to reconnect done"));
1da177e4
LT		 395 csocket = server->ssocket;
396 continue;
397 } else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
b8643e1b 398 msleep(1); /* minimum sleep to prevent looping
1da177e4
LT		 399 allowing socket to clear and app threads to set
400 tcpStatus CifsNeedReconnect if server hung */
c527c8a7
SF		 401 if (pdu_length < 4) {
402 iov.iov_base = (4 - pdu_length) +
403 (char *)smb_buffer;
404 iov.iov_len = pdu_length;
405 smb_msg.msg_control = NULL;
406 smb_msg.msg_controllen = 0;
c18c732e 407 goto incomplete_rcv;
c527c8a7 408 } else
c18c732e 409 continue;
1da177e4 410 } else if (length <= 0) {
0fd1ffe0
PM		 411 if (server->tcpStatus == CifsNew) {
412 cFYI(1, ("tcp session abend after SMBnegprot"));
09d1db5c
SF		 413 /* some servers kill the TCP session rather than
414 returning an SMB negprot error, in which
415 case reconnecting here is not going to help,
416 and so simply return error to mount */
1da177e4
LT		 417 break;
418 }
0fd1ffe0 419 if (!try_to_freeze() && (length == -EINTR)) {
467a8f8d 420 cFYI(1, ("cifsd thread killed"));
1da177e4
LT		 421 break;
422 }
467a8f8d 423 cFYI(1, ("Reconnect after unexpected peek error %d",
57337e42 424 length));
1da177e4
LT		 425 cifs_reconnect(server);
426 csocket = server->ssocket;
427 wake_up(&server->response_q);
428 continue;
2a974680
PT		 429 } else if (length < pdu_length) {
430 cFYI(1, ("requested %d bytes but only got %d bytes",
431 pdu_length, length));
f01d5e14 432 pdu_length -= length;
f01d5e14
SF		 433 msleep(1);
434 goto incomplete_rcv;
46810cbf 435 }
1da177e4 436
70ca734a
SF		 437 /* The right amount was read from socket - 4 bytes */
438 /* so we can now interpret the length field */
46810cbf 439
70ca734a
SF		 440 /* the first byte big endian of the length field,
441 is actually not part of the length but the type
442 with the most common, zero, as regular data */
443 temp = *((char *) smb_buffer);
46810cbf 444
fb8c4b14 445 /* Note that FC 1001 length is big endian on the wire,
70ca734a
SF		 446 but we convert it here so it is always manipulated
447 as host byte order */
5ca33c6a 448 pdu_length = be32_to_cpu((__force __be32)smb_buffer->smb_buf_length);
70ca734a
SF		 449 smb_buffer->smb_buf_length = pdu_length;
450
467a8f8d 451 cFYI(1, ("rfc1002 length 0x%x", pdu_length+4));
46810cbf 452
70ca734a 453 if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
fb8c4b14 454 continue;
70ca734a 455 } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
467a8f8d 456 cFYI(1, ("Good RFC 1002 session rsp"));
e4eb295d 457 continue;
70ca734a 458 } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
fb8c4b14 459 /* we get this from Windows 98 instead of
46810cbf 460 an error on SMB negprot response */
fb8c4b14 461 cFYI(1, ("Negative RFC1002 Session Response Error 0x%x)",
70ca734a 462 pdu_length));
fb8c4b14
SF		 463 if (server->tcpStatus == CifsNew) {
464 /* if nack on negprot (rather than
46810cbf
SF		 465 ret of smb negprot error) reconnecting
466 not going to help, ret error to mount */
467 break;
468 } else {
469 /* give server a second to
470 clean up before reconnect attempt */
471 msleep(1000);
472 /* always try 445 first on reconnect
473 since we get NACK on some if we ever
fb8c4b14 474 connected to port 139 (the NACK is
46810cbf
SF		 475 since we do not begin with RFC1001
476 session initialize frame) */
fb8c4b14 477 server->addr.sockAddr.sin_port =
46810cbf 478 htons(CIFS_PORT);
1da177e4
LT		 479 cifs_reconnect(server);
480 csocket = server->ssocket;
46810cbf 481 wake_up(&server->response_q);
1da177e4 482 continue;
46810cbf 483 }
70ca734a 484 } else if (temp != (char) 0) {
fb8c4b14 485 cERROR(1, ("Unknown RFC 1002 frame"));
70ca734a
SF		 486 cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
487 length);
46810cbf
SF		 488 cifs_reconnect(server);
489 csocket = server->ssocket;
490 continue;
e4eb295d
SF		 491 }
492
493 /* else we have an SMB response */
fb8c4b14 494 if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
26f57364 495 (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) {
e4eb295d 496 cERROR(1, ("Invalid size SMB length %d pdu_length %d",
46810cbf 497 length, pdu_length+4));
e4eb295d
SF		 498 cifs_reconnect(server);
499 csocket = server->ssocket;
500 wake_up(&server->response_q);
501 continue;
fb8c4b14 502 }
e4eb295d
SF		 503
504 /* else length ok */
505 reconnect = 0;
506
fb8c4b14 507 if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
4b18f2a9 508 isLargeBuf = true;
e4eb295d
SF		 509 memcpy(bigbuf, smallbuf, 4);
510 smb_buffer = bigbuf;
511 }
512 length = 0;
513 iov.iov_base = 4 + (char *)smb_buffer;
514 iov.iov_len = pdu_length;
fb8c4b14 515 for (total_read = 0; total_read < pdu_length;
e4eb295d
SF		 516 total_read += length) {
517 length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
518 pdu_length - total_read, 0);
469ee614 519 if ((server->tcpStatus == CifsExiting) ||
e4eb295d
SF		 520 (length == -EINTR)) {
521 /* then will exit */
522 reconnect = 2;
523 break;
524 } else if (server->tcpStatus == CifsNeedReconnect) {
46810cbf
SF		 525 cifs_reconnect(server);
526 csocket = server->ssocket;
fb8c4b14 527 /* Reconnect wakes up rspns q */
e4eb295d
SF		 528 /* Now we will reread sock */
529 reconnect = 1;
530 break;
fb8c4b14 531 } else if ((length == -ERESTARTSYS) ||
e4eb295d
SF		 532 (length == -EAGAIN)) {
533 msleep(1); /* minimum sleep to prevent looping,
fb8c4b14 534 allowing socket to clear and app
e4eb295d
SF		 535 threads to set tcpStatus
536 CifsNeedReconnect if server hung*/
c18c732e 537 length = 0;
46810cbf 538 continue;
e4eb295d 539 } else if (length <= 0) {
fb8c4b14 540 cERROR(1, ("Received no data, expecting %d",
e4eb295d
SF		 541 pdu_length - total_read));
542 cifs_reconnect(server);
543 csocket = server->ssocket;
544 reconnect = 1;
545 break;
46810cbf 546 }
e4eb295d 547 }
fb8c4b14 548 if (reconnect == 2)
e4eb295d 549 break;
fb8c4b14 550 else if (reconnect == 1)
e4eb295d 551 continue;
1da177e4 552
e4eb295d 553 length += 4; /* account for rfc1002 hdr */
50c2f753 554
09d1db5c 555
e4eb295d 556 dump_smb(smb_buffer, length);
184ed211 557 if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
b387eaeb 558 cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
e4eb295d
SF		 559 continue;
560 }
1da177e4 561
e4eb295d
SF		 562
563 task_to_wake = NULL;
564 spin_lock(&GlobalMid_Lock);
565 list_for_each(tmp, &server->pending_mid_q) {
566 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
567
50c2f753 568 if ((mid_entry->mid == smb_buffer->Mid) &&
e4eb295d
SF		 569 (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
570 (mid_entry->command == smb_buffer->Command)) {
fb8c4b14 571 if (check2ndT2(smb_buffer,server->maxBuf) > 0) {
e4eb295d 572 /* We have a multipart transact2 resp */
4b18f2a9 573 isMultiRsp = true;
fb8c4b14 574 if (mid_entry->resp_buf) {
e4eb295d 575 /* merge response - fix up 1st*/
50c2f753 576 if (coalesce_t2(smb_buffer,
e4eb295d 577 mid_entry->resp_buf)) {
4b18f2a9
SF		 578 mid_entry->multiRsp =
579 true;
e4eb295d
SF		 580 break;
581 } else {
582 /* all parts received */
4b18f2a9
SF		 583 mid_entry->multiEnd =
584 true;
50c2f753 585 goto multi_t2_fnd;
e4eb295d
SF		 586 }
587 } else {
fb8c4b14 588 if (!isLargeBuf) {
e4eb295d
SF		 589 cERROR(1,("1st trans2 resp needs bigbuf"));
590 /* BB maybe we can fix this up, switch
50c2f753 591 to already allocated large buffer? */
e4eb295d 592 } else {
cd63499c 593 /* Have first buffer */
e4eb295d
SF		 594 mid_entry->resp_buf =
595 smb_buffer;
4b18f2a9
SF		 596 mid_entry->largeBuf =
597 true;
e4eb295d
SF		 598 bigbuf = NULL;
599 }
600 }
601 break;
50c2f753 602 }
e4eb295d 603 mid_entry->resp_buf = smb_buffer;
4b18f2a9 604 mid_entry->largeBuf = isLargeBuf;
e4eb295d
SF		 605multi_t2_fnd:
606 task_to_wake = mid_entry->tsk;
607 mid_entry->midState = MID_RESPONSE_RECEIVED;
1047abc1
SF		 608#ifdef CONFIG_CIFS_STATS2
609 mid_entry->when_received = jiffies;
610#endif
3a5ff61c
SF		 611 /* so we do not time out requests to server
612 which is still responding (since server could
613 be busy but not dead) */
614 server->lstrp = jiffies;
e4eb295d 615 break;
46810cbf 616 }
1da177e4 617 }
e4eb295d
SF		 618 spin_unlock(&GlobalMid_Lock);
619 if (task_to_wake) {
cd63499c 620 /* Was previous buf put in mpx struct for multi-rsp? */
fb8c4b14 621 if (!isMultiRsp) {
cd63499c 622 /* smb buffer will be freed by user thread */
26f57364 623 if (isLargeBuf)
cd63499c 624 bigbuf = NULL;
26f57364 625 else
cd63499c
SF		 626 smallbuf = NULL;
627 }
e4eb295d 628 wake_up_process(task_to_wake);
4b18f2a9
SF		 629 } else if (!is_valid_oplock_break(smb_buffer, server) &&
630 !isMultiRsp) {
50c2f753
SF		 631 cERROR(1, ("No task to wake, unknown frame received! "
632 "NumMids %d", midCount.counter));
633 cifs_dump_mem("Received Data is: ", (char *)smb_buffer,
70ca734a 634 sizeof(struct smb_hdr));
3979877e
SF		 635#ifdef CONFIG_CIFS_DEBUG2
636 cifs_dump_detail(smb_buffer);
637 cifs_dump_mids(server);
638#endif /* CIFS_DEBUG2 */
50c2f753 639
e4eb295d
SF		 640 }
641 } /* end while !EXITING */
642
e7ddee90
JL		 643 /* take it off the list, if it's not already */
644 write_lock(&cifs_tcp_ses_lock);
645 list_del_init(&server->tcp_ses_list);
646 write_unlock(&cifs_tcp_ses_lock);
647
1da177e4
LT		 648 spin_lock(&GlobalMid_Lock);
649 server->tcpStatus = CifsExiting;
e691b9d1 650 spin_unlock(&GlobalMid_Lock);
dbdbb876 651 wake_up_all(&server->response_q);
e691b9d1 652
31ca3bc3
SF		 653 /* check if we have blocked requests that need to free */
654 /* Note that cifs_max_pending is normally 50, but
655 can be set at module install time to as little as two */
e691b9d1 656 spin_lock(&GlobalMid_Lock);
fb8c4b14 657 if (atomic_read(&server->inFlight) >= cifs_max_pending)
31ca3bc3
SF		 658 atomic_set(&server->inFlight, cifs_max_pending - 1);
659 /* We do not want to set the max_pending too low or we
660 could end up with the counter going negative */
1da177e4 661 spin_unlock(&GlobalMid_Lock);
50c2f753 662 /* Although there should not be any requests blocked on
1da177e4 663 this queue it can not hurt to be paranoid and try to wake up requests
09d1db5c 664 that may haven been blocked when more than 50 at time were on the wire
1da177e4
LT		 665 to the same server - they now will see the session is in exit state
666 and get out of SendReceive. */
667 wake_up_all(&server->request_q);
668 /* give those requests time to exit */
b8643e1b 669 msleep(125);
50c2f753 670
fb8c4b14 671 if (server->ssocket) {
1da177e4
LT		 672 sock_release(csocket);
673 server->ssocket = NULL;
674 }
b8643e1b 675 /* buffer usuallly freed in free_mid - need to free it here on exit */
a8a11d39
MK		 676 cifs_buf_release(bigbuf);
677 if (smallbuf) /* no sense logging a debug message if NULL */
b8643e1b 678 cifs_small_buf_release(smallbuf);
1da177e4 679
14fbf50d
JL		 680 /*
681 * BB: we shouldn't have to do any of this. It shouldn't be
682 * possible to exit from the thread with active SMB sessions
683 */
684 read_lock(&cifs_tcp_ses_lock);
1da177e4 685 if (list_empty(&server->pending_mid_q)) {
09d1db5c
SF		 686 /* loop through server session structures attached to this and
687 mark them dead */
14fbf50d
JL		 688 list_for_each(tmp, &server->smb_ses_list) {
689 ses = list_entry(tmp, struct cifsSesInfo,
690 smb_ses_list);
691 ses->status = CifsExiting;
692 ses->server = NULL;
1da177e4 693 }
14fbf50d 694 read_unlock(&cifs_tcp_ses_lock);
1da177e4 695 } else {
31ca3bc3
SF		 696 /* although we can not zero the server struct pointer yet,
697 since there are active requests which may depnd on them,
698 mark the corresponding SMB sessions as exiting too */
14fbf50d 699 list_for_each(tmp, &server->smb_ses_list) {
31ca3bc3 700 ses = list_entry(tmp, struct cifsSesInfo,
14fbf50d
JL		 701 smb_ses_list);
702 ses->status = CifsExiting;
31ca3bc3
SF		 703 }
704
1da177e4
LT		 705 spin_lock(&GlobalMid_Lock);
706 list_for_each(tmp, &server->pending_mid_q) {
707 mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
708 if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
50c2f753
SF		 709 cFYI(1, ("Clearing Mid 0x%x - waking up ",
710 mid_entry->mid));
1da177e4 711 task_to_wake = mid_entry->tsk;
26f57364 712 if (task_to_wake)
1da177e4 713 wake_up_process(task_to_wake);
1da177e4
LT		 714 }
715 }
716 spin_unlock(&GlobalMid_Lock);
14fbf50d 717 read_unlock(&cifs_tcp_ses_lock);
1da177e4 718 /* 1/8th of sec is more than enough time for them to exit */
b8643e1b 719 msleep(125);
1da177e4
LT		 720 }
721
f191401f 722 if (!list_empty(&server->pending_mid_q)) {
50c2f753 723 /* mpx threads have not exited yet give them
1da177e4 724 at least the smb send timeout time for long ops */
31ca3bc3
SF		 725 /* due to delays on oplock break requests, we need
726 to wait at least 45 seconds before giving up
727 on a request getting a response and going ahead
728 and killing cifsd */
1da177e4 729 cFYI(1, ("Wait for exit from demultiplex thread"));
31ca3bc3 730 msleep(46000);
1da177e4
LT		 731 /* if threads still have not exited they are probably never
732 coming home not much else we can do but free the memory */
733 }
1da177e4 734
31ca3bc3
SF		 735 /* last chance to mark ses pointers invalid
736 if there are any pointing to this (e.g
50c2f753 737 if a crazy root user tried to kill cifsd
31ca3bc3 738 kernel thread explicitly this might happen) */
14fbf50d
JL		 739 /* BB: This shouldn't be necessary, see above */
740 read_lock(&cifs_tcp_ses_lock);
741 list_for_each(tmp, &server->smb_ses_list) {
742 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
743 ses->server = NULL;
31ca3bc3 744 }
14fbf50d 745 read_unlock(&cifs_tcp_ses_lock);
31ca3bc3 746
c359cf3c 747 kfree(server->hostname);
b1c8d2b4 748 task_to_wake = xchg(&server->tsk, NULL);
31ca3bc3 749 kfree(server);
93d0ec85
JL		 750
751 length = atomic_dec_return(&tcpSesAllocCount);
26f57364
SF		 752 if (length > 0)
753 mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
754 GFP_KERNEL);
50c2f753 755
b1c8d2b4
JL		 756 /* if server->tsk was NULL then wait for a signal before exiting */
757 if (!task_to_wake) {
758 set_current_state(TASK_INTERRUPTIBLE);
759 while (!signal_pending(current)) {
760 schedule();
761 set_current_state(TASK_INTERRUPTIBLE);
762 }
763 set_current_state(TASK_RUNNING);
764 }
765
0468a2cf 766 module_put_and_exit(0);
1da177e4
LT		 767}
768
c359cf3c
JL		 769/* extract the host portion of the UNC string */
770static char *
771extract_hostname(const char *unc)
772{
773 const char *src;
774 char *dst, *delim;
775 unsigned int len;
776
777 /* skip double chars at beginning of string */
778 /* BB: check validity of these bytes? */
779 src = unc + 2;
780
781 /* delimiter between hostname and sharename is always '\\' now */
782 delim = strchr(src, '\\');
783 if (!delim)
784 return ERR_PTR(-EINVAL);
785
786 len = delim - src;
787 dst = kmalloc((len + 1), GFP_KERNEL);
788 if (dst == NULL)
789 return ERR_PTR(-ENOMEM);
790
791 memcpy(dst, src, len);
792 dst[len] = '\0';
793
794 return dst;
795}
796
1da177e4 797static int
50c2f753
SF		 798cifs_parse_mount_options(char *options, const char *devname,
799 struct smb_vol *vol)
1da177e4
LT		 800{
801 char *value;
802 char *data;
803 unsigned int temp_len, i, j;
804 char separator[2];
805
806 separator[0] = ',';
50c2f753 807 separator[1] = 0;
1da177e4 808
12e36b2f 809 if (Local_System_Name[0] != 0)
50c2f753 810 memcpy(vol->source_rfc1001_name, Local_System_Name, 15);
2cd646a2 811 else {
12e36b2f 812 char *nodename = utsname()->nodename;
50c2f753
SF		 813 int n = strnlen(nodename, 15);
814 memset(vol->source_rfc1001_name, 0x20, 15);
815 for (i = 0; i < n; i++) {
2cd646a2
SF		 816 /* does not have to be perfect mapping since field is
817 informational, only used for servers that do not support
818 port 445 and it can be overridden at mount time */
12e36b2f 819 vol->source_rfc1001_name[i] = toupper(nodename[i]);
2cd646a2 820 }
1da177e4
LT		 821 }
822 vol->source_rfc1001_name[15] = 0;
a10faeb2
SF		 823 /* null target name indicates to use *SMBSERVR default called name
824 if we end up sending RFC1001 session initialize */
825 vol->target_rfc1001_name[0] = 0;
a001e5b5
DH		 826 vol->linux_uid = current_uid(); /* use current_euid() instead? */
827 vol->linux_gid = current_gid();
1da177e4
LT		 828 vol->dir_mode = S_IRWXUGO;
829 /* 2767 perms indicate mandatory locking support */
7505e052 830 vol->file_mode = (S_IRWXUGO | S_ISGID) & (~S_IXGRP);
1da177e4
LT		 831
832 /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
4b18f2a9 833 vol->rw = true;
ac67055e
JA		 834 /* default is always to request posix paths. */
835 vol->posix_paths = 1;
836
1da177e4
LT		 837 if (!options)
838 return 1;
839
50c2f753 840 if (strncmp(options, "sep=", 4) == 0) {
fb8c4b14 841 if (options[4] != 0) {
1da177e4
LT		 842 separator[0] = options[4];
843 options += 5;
844 } else {
467a8f8d 845 cFYI(1, ("Null separator not allowed"));
1da177e4
LT		 846 }
847 }
50c2f753 848
1da177e4
LT		 849 while ((data = strsep(&options, separator)) != NULL) {
850 if (!*data)
851 continue;
852 if ((value = strchr(data, '=')) != NULL)
853 *value++ = '\0';
854
50c2f753
SF		 855 /* Have to parse this before we parse for "user" */
856 if (strnicmp(data, "user_xattr", 10) == 0) {
1da177e4 857 vol->no_xattr = 0;
50c2f753 858 } else if (strnicmp(data, "nouser_xattr", 12) == 0) {
1da177e4
LT		 859 vol->no_xattr = 1;
860 } else if (strnicmp(data, "user", 4) == 0) {
4b952a9b 861 if (!value) {
1da177e4
LT		 862 printk(KERN_WARNING
863 "CIFS: invalid or missing username\n");
864 return 1; /* needs_arg; */
fb8c4b14 865 } else if (!*value) {
4b952a9b
SF		 866 /* null user, ie anonymous, authentication */
867 vol->nullauth = 1;
1da177e4
LT		 868 }
869 if (strnlen(value, 200) < 200) {
870 vol->username = value;
871 } else {
872 printk(KERN_WARNING "CIFS: username too long\n");
873 return 1;
874 }
875 } else if (strnicmp(data, "pass", 4) == 0) {
876 if (!value) {
877 vol->password = NULL;
878 continue;
fb8c4b14 879 } else if (value[0] == 0) {
1da177e4
LT		 880 /* check if string begins with double comma
881 since that would mean the password really
882 does start with a comma, and would not
883 indicate an empty string */
fb8c4b14 884 if (value[1] != separator[0]) {
1da177e4
LT		 885 vol->password = NULL;
886 continue;
887 }
888 }
889 temp_len = strlen(value);
890 /* removed password length check, NTLM passwords
891 can be arbitrarily long */
892
50c2f753 893 /* if comma in password, the string will be
1da177e4
LT		 894 prematurely null terminated. Commas in password are
895 specified across the cifs mount interface by a double
896 comma ie ,, and a comma used as in other cases ie ','
897 as a parameter delimiter/separator is single and due
898 to the strsep above is temporarily zeroed. */
899
900 /* NB: password legally can have multiple commas and
901 the only illegal character in a password is null */
902
50c2f753 903 if ((value[temp_len] == 0) &&
09d1db5c 904 (value[temp_len+1] == separator[0])) {
1da177e4
LT		 905 /* reinsert comma */
906 value[temp_len] = separator[0];
50c2f753
SF		 907 temp_len += 2; /* move after second comma */
908 while (value[temp_len] != 0) {
1da177e4 909 if (value[temp_len] == separator[0]) {
50c2f753 910 if (value[temp_len+1] ==
09d1db5c
SF		 911 separator[0]) {
912 /* skip second comma */
913 temp_len++;
50c2f753 914 } else {
1da177e4
LT		 915 /* single comma indicating start
916 of next parm */
917 break;
918 }
919 }
920 temp_len++;
921 }
fb8c4b14 922 if (value[temp_len] == 0) {
1da177e4
LT		 923 options = NULL;
924 } else {
925 value[temp_len] = 0;
926 /* point option to start of next parm */
927 options = value + temp_len + 1;
928 }
50c2f753 929 /* go from value to value + temp_len condensing
1da177e4
LT		 930 double commas to singles. Note that this ends up
931 allocating a few bytes too many, which is ok */
e915fc49 932 vol->password = kzalloc(temp_len, GFP_KERNEL);
fb8c4b14 933 if (vol->password == NULL) {
50c2f753
SF		 934 printk(KERN_WARNING "CIFS: no memory "
935 "for password\n");
433dc24f
SF		 936 return 1;
937 }
50c2f753 938 for (i = 0, j = 0; i < temp_len; i++, j++) {
1da177e4 939 vol->password[j] = value[i];
fb8c4b14 940 if (value[i] == separator[0]
09d1db5c 941 && value[i+1] == separator[0]) {
1da177e4
LT		 942 /* skip second comma */
943 i++;
944 }
945 }
946 vol->password[j] = 0;
947 } else {
e915fc49 948 vol->password = kzalloc(temp_len+1, GFP_KERNEL);
fb8c4b14 949 if (vol->password == NULL) {
50c2f753
SF		 950 printk(KERN_WARNING "CIFS: no memory "
951 "for password\n");
433dc24f
SF		 952 return 1;
953 }
1da177e4
LT		 954 strcpy(vol->password, value);
955 }
956 } else if (strnicmp(data, "ip", 2) == 0) {
957 if (!value || !*value) {
958 vol->UNCip = NULL;
959 } else if (strnlen(value, 35) < 35) {
960 vol->UNCip = value;
961 } else {
50c2f753
SF		 962 printk(KERN_WARNING "CIFS: ip address "
963 "too long\n");
1da177e4
LT		 964 return 1;
965 }
50c2f753
SF		 966 } else if (strnicmp(data, "sec", 3) == 0) {
967 if (!value || !*value) {
968 cERROR(1, ("no security value specified"));
969 continue;
970 } else if (strnicmp(value, "krb5i", 5) == 0) {
971 vol->secFlg |= CIFSSEC_MAY_KRB5 |
189acaae 972 CIFSSEC_MUST_SIGN;
bf820679 973 } else if (strnicmp(value, "krb5p", 5) == 0) {
50c2f753
SF		 974 /* vol->secFlg |= CIFSSEC_MUST_SEAL |
975 CIFSSEC_MAY_KRB5; */
976 cERROR(1, ("Krb5 cifs privacy not supported"));
bf820679
SF		 977 return 1;
978 } else if (strnicmp(value, "krb5", 4) == 0) {
750d1151 979 vol->secFlg |= CIFSSEC_MAY_KRB5;
bf820679 980 } else if (strnicmp(value, "ntlmv2i", 7) == 0) {
750d1151 981 vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
189acaae 982 CIFSSEC_MUST_SIGN;
bf820679 983 } else if (strnicmp(value, "ntlmv2", 6) == 0) {
750d1151 984 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
bf820679 985 } else if (strnicmp(value, "ntlmi", 5) == 0) {
750d1151 986 vol->secFlg |= CIFSSEC_MAY_NTLM |
189acaae 987 CIFSSEC_MUST_SIGN;
bf820679
SF		 988 } else if (strnicmp(value, "ntlm", 4) == 0) {
989 /* ntlm is default so can be turned off too */
750d1151 990 vol->secFlg |= CIFSSEC_MAY_NTLM;
bf820679 991 } else if (strnicmp(value, "nontlm", 6) == 0) {
189acaae 992 /* BB is there a better way to do this? */
750d1151 993 vol->secFlg |= CIFSSEC_MAY_NTLMV2;
189acaae
SF		 994#ifdef CONFIG_CIFS_WEAK_PW_HASH
995 } else if (strnicmp(value, "lanman", 6) == 0) {
50c2f753 996 vol->secFlg |= CIFSSEC_MAY_LANMAN;
189acaae 997#endif
bf820679 998 } else if (strnicmp(value, "none", 4) == 0) {
189acaae 999 vol->nullauth = 1;
50c2f753
SF		 1000 } else {
1001 cERROR(1, ("bad security option: %s", value));
1002 return 1;
1003 }
1da177e4
LT		 1004 } else if ((strnicmp(data, "unc", 3) == 0)
1005 || (strnicmp(data, "target", 6) == 0)
1006 || (strnicmp(data, "path", 4) == 0)) {
1007 if (!value || !*value) {
50c2f753
SF		 1008 printk(KERN_WARNING "CIFS: invalid path to "
1009 "network resource\n");
1da177e4
LT		 1010 return 1; /* needs_arg; */
1011 }
1012 if ((temp_len = strnlen(value, 300)) < 300) {
50c2f753 1013 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
4523cc30 1014 if (vol->UNC == NULL)
1da177e4 1015 return 1;
50c2f753 1016 strcpy(vol->UNC, value);
1da177e4
LT		 1017 if (strncmp(vol->UNC, "//", 2) == 0) {
1018 vol->UNC[0] = '\\';
1019 vol->UNC[1] = '\\';
50c2f753 1020 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
1da177e4 1021 printk(KERN_WARNING
50c2f753
SF		 1022 "CIFS: UNC Path does not begin "
1023 "with // or \\\\ \n");
1da177e4
LT		 1024 return 1;
1025 }
1026 } else {
1027 printk(KERN_WARNING "CIFS: UNC name too long\n");
1028 return 1;
1029 }
1030 } else if ((strnicmp(data, "domain", 3) == 0)
1031 || (strnicmp(data, "workgroup", 5) == 0)) {
1032 if (!value || !*value) {
1033 printk(KERN_WARNING "CIFS: invalid domain name\n");
1034 return 1; /* needs_arg; */
1035 }
1036 /* BB are there cases in which a comma can be valid in
1037 a domain name and need special handling? */
3979877e 1038 if (strnlen(value, 256) < 256) {
1da177e4
LT		 1039 vol->domainname = value;
1040 cFYI(1, ("Domain name set"));
1041 } else {
50c2f753
SF		 1042 printk(KERN_WARNING "CIFS: domain name too "
1043 "long\n");
1da177e4
LT		 1044 return 1;
1045 }
50c2f753
SF		 1046 } else if (strnicmp(data, "prefixpath", 10) == 0) {
1047 if (!value || !*value) {
1048 printk(KERN_WARNING
1049 "CIFS: invalid path prefix\n");
1050 return 1; /* needs_argument */
1051 }
1052 if ((temp_len = strnlen(value, 1024)) < 1024) {
4523cc30 1053 if (value[0] != '/')
2fe87f02 1054 temp_len++; /* missing leading slash */
50c2f753
SF		 1055 vol->prepath = kmalloc(temp_len+1, GFP_KERNEL);
1056 if (vol->prepath == NULL)
1057 return 1;
4523cc30 1058 if (value[0] != '/') {
2fe87f02 1059 vol->prepath[0] = '/';
50c2f753 1060 strcpy(vol->prepath+1, value);
2fe87f02 1061 } else
50c2f753
SF		 1062 strcpy(vol->prepath, value);
1063 cFYI(1, ("prefix path %s", vol->prepath));
1064 } else {
1065 printk(KERN_WARNING "CIFS: prefix too long\n");
1066 return 1;
1067 }
1da177e4
LT		 1068 } else if (strnicmp(data, "iocharset", 9) == 0) {
1069 if (!value || !*value) {
63135e08
SF		 1070 printk(KERN_WARNING "CIFS: invalid iocharset "
1071 "specified\n");
1da177e4
LT		 1072 return 1; /* needs_arg; */
1073 }
1074 if (strnlen(value, 65) < 65) {
50c2f753 1075 if (strnicmp(value, "default", 7))
1da177e4 1076 vol->iocharset = value;
50c2f753
SF		 1077 /* if iocharset not set then load_nls_default
1078 is used by caller */
1079 cFYI(1, ("iocharset set to %s", value));
1da177e4 1080 } else {
63135e08
SF		 1081 printk(KERN_WARNING "CIFS: iocharset name "
1082 "too long.\n");
1da177e4
LT		 1083 return 1;
1084 }
1085 } else if (strnicmp(data, "uid", 3) == 0) {
1086 if (value && *value) {
1087 vol->linux_uid =
1088 simple_strtoul(value, &value, 0);
4523cc30 1089 vol->override_uid = 1;
1da177e4
LT		 1090 }
1091 } else if (strnicmp(data, "gid", 3) == 0) {
1092 if (value && *value) {
1093 vol->linux_gid =
1094 simple_strtoul(value, &value, 0);
4523cc30 1095 vol->override_gid = 1;
1da177e4
LT		 1096 }
1097 } else if (strnicmp(data, "file_mode", 4) == 0) {
1098 if (value && *value) {
1099 vol->file_mode =
1100 simple_strtoul(value, &value, 0);
1101 }
1102 } else if (strnicmp(data, "dir_mode", 4) == 0) {
1103 if (value && *value) {
1104 vol->dir_mode =
1105 simple_strtoul(value, &value, 0);
1106 }
1107 } else if (strnicmp(data, "dirmode", 4) == 0) {
1108 if (value && *value) {
1109 vol->dir_mode =
1110 simple_strtoul(value, &value, 0);
1111 }
1112 } else if (strnicmp(data, "port", 4) == 0) {
1113 if (value && *value) {
1114 vol->port =
1115 simple_strtoul(value, &value, 0);
1116 }
1117 } else if (strnicmp(data, "rsize", 5) == 0) {
1118 if (value && *value) {
1119 vol->rsize =
1120 simple_strtoul(value, &value, 0);
1121 }
1122 } else if (strnicmp(data, "wsize", 5) == 0) {
1123 if (value && *value) {
1124 vol->wsize =
1125 simple_strtoul(value, &value, 0);
1126 }
1127 } else if (strnicmp(data, "sockopt", 5) == 0) {
1128 if (value && *value) {
1129 vol->sockopt =
1130 simple_strtoul(value, &value, 0);
1131 }
1132 } else if (strnicmp(data, "netbiosname", 4) == 0) {
1133 if (!value || !*value || (*value == ' ')) {
63135e08 1134 cFYI(1, ("invalid (empty) netbiosname"));
1da177e4 1135 } else {
50c2f753
SF		 1136 memset(vol->source_rfc1001_name, 0x20, 15);
1137 for (i = 0; i < 15; i++) {
1138 /* BB are there cases in which a comma can be
1da177e4
LT		 1139 valid in this workstation netbios name (and need
1140 special handling)? */
1141
1142 /* We do not uppercase netbiosname for user */
50c2f753 1143 if (value[i] == 0)
1da177e4 1144 break;
50c2f753
SF		 1145 else
1146 vol->source_rfc1001_name[i] =
1147 value[i];
1da177e4
LT		 1148 }
1149 /* The string has 16th byte zero still from
1150 set at top of the function */
50c2f753
SF		 1151 if ((i == 15) && (value[i] != 0))
1152 printk(KERN_WARNING "CIFS: netbiosname"
1153 " longer than 15 truncated.\n");
a10faeb2
SF		 1154 }
1155 } else if (strnicmp(data, "servern", 7) == 0) {
1156 /* servernetbiosname specified override *SMBSERVER */
1157 if (!value || !*value || (*value == ' ')) {
467a8f8d 1158 cFYI(1, ("empty server netbiosname specified"));
a10faeb2
SF		 1159 } else {
1160 /* last byte, type, is 0x20 for servr type */
50c2f753 1161 memset(vol->target_rfc1001_name, 0x20, 16);
a10faeb2 1162
50c2f753 1163 for (i = 0; i < 15; i++) {
a10faeb2 1164 /* BB are there cases in which a comma can be
50c2f753
SF		 1165 valid in this workstation netbios name
1166 (and need special handling)? */
a10faeb2 1167
50c2f753
SF		 1168 /* user or mount helper must uppercase
1169 the netbiosname */
1170 if (value[i] == 0)
a10faeb2
SF		 1171 break;
1172 else
50c2f753
SF		 1173 vol->target_rfc1001_name[i] =
1174 value[i];
a10faeb2
SF		 1175 }
1176 /* The string has 16th byte zero still from
1177 set at top of the function */
50c2f753
SF		 1178 if ((i == 15) && (value[i] != 0))
1179 printk(KERN_WARNING "CIFS: server net"
1180 "biosname longer than 15 truncated.\n");
1da177e4
LT		 1181 }
1182 } else if (strnicmp(data, "credentials", 4) == 0) {
1183 /* ignore */
1184 } else if (strnicmp(data, "version", 3) == 0) {
1185 /* ignore */
50c2f753 1186 } else if (strnicmp(data, "guest", 5) == 0) {
1da177e4
LT		 1187 /* ignore */
1188 } else if (strnicmp(data, "rw", 2) == 0) {
4b18f2a9 1189 vol->rw = true;
edf1ae40
SF		 1190 } else if (strnicmp(data, "noblocksend", 11) == 0) {
1191 vol->noblocksnd = 1;
1192 } else if (strnicmp(data, "noautotune", 10) == 0) {
1193 vol->noautotune = 1;
1da177e4
LT		 1194 } else if ((strnicmp(data, "suid", 4) == 0) ||
1195 (strnicmp(data, "nosuid", 6) == 0) ||
1196 (strnicmp(data, "exec", 4) == 0) ||
1197 (strnicmp(data, "noexec", 6) == 0) ||
1198 (strnicmp(data, "nodev", 5) == 0) ||
1199 (strnicmp(data, "noauto", 6) == 0) ||
1200 (strnicmp(data, "dev", 3) == 0)) {
1201 /* The mount tool or mount.cifs helper (if present)
50c2f753
SF		 1202 uses these opts to set flags, and the flags are read
1203 by the kernel vfs layer before we get here (ie
1204 before read super) so there is no point trying to
1205 parse these options again and set anything and it
1206 is ok to just ignore them */
1da177e4
LT		 1207 continue;
1208 } else if (strnicmp(data, "ro", 2) == 0) {
4b18f2a9 1209 vol->rw = false;
1da177e4
LT		 1210 } else if (strnicmp(data, "hard", 4) == 0) {
1211 vol->retry = 1;
1212 } else if (strnicmp(data, "soft", 4) == 0) {
1213 vol->retry = 0;
1214 } else if (strnicmp(data, "perm", 4) == 0) {
1215 vol->noperm = 0;
1216 } else if (strnicmp(data, "noperm", 6) == 0) {
1217 vol->noperm = 1;
6a0b4824
SF		 1218 } else if (strnicmp(data, "mapchars", 8) == 0) {
1219 vol->remap = 1;
1220 } else if (strnicmp(data, "nomapchars", 10) == 0) {
1221 vol->remap = 0;
50c2f753
SF		 1222 } else if (strnicmp(data, "sfu", 3) == 0) {
1223 vol->sfu_emul = 1;
1224 } else if (strnicmp(data, "nosfu", 5) == 0) {
1225 vol->sfu_emul = 0;
2c1b8615
SF		 1226 } else if (strnicmp(data, "nodfs", 5) == 0) {
1227 vol->nodfs = 1;
ac67055e
JA		 1228 } else if (strnicmp(data, "posixpaths", 10) == 0) {
1229 vol->posix_paths = 1;
1230 } else if (strnicmp(data, "noposixpaths", 12) == 0) {
1231 vol->posix_paths = 0;
c18c842b
SF		 1232 } else if (strnicmp(data, "nounix", 6) == 0) {
1233 vol->no_linux_ext = 1;
1234 } else if (strnicmp(data, "nolinux", 7) == 0) {
1235 vol->no_linux_ext = 1;
50c2f753 1236 } else if ((strnicmp(data, "nocase", 6) == 0) ||
a10faeb2 1237 (strnicmp(data, "ignorecase", 10) == 0)) {
50c2f753 1238 vol->nocase = 1;
c46fa8ac
SF		 1239 } else if (strnicmp(data, "brl", 3) == 0) {
1240 vol->nobrl = 0;
50c2f753 1241 } else if ((strnicmp(data, "nobrl", 5) == 0) ||
1c955187 1242 (strnicmp(data, "nolock", 6) == 0)) {
c46fa8ac 1243 vol->nobrl = 1;
d3485d37
SF		 1244 /* turn off mandatory locking in mode
1245 if remote locking is turned off since the
1246 local vfs will do advisory */
50c2f753
SF		 1247 if (vol->file_mode ==
1248 (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
d3485d37 1249 vol->file_mode = S_IALLUGO;
13a6e42a
SF		 1250 } else if (strnicmp(data, "forcemandatorylock", 9) == 0) {
1251 /* will take the shorter form "forcemand" as well */
1252 /* This mount option will force use of mandatory
1253 (DOS/Windows style) byte range locks, instead of
1254 using posix advisory byte range locks, even if the
1255 Unix extensions are available and posix locks would
1256 be supported otherwise. If Unix extensions are not
1257 negotiated this has no effect since mandatory locks
1258 would be used (mandatory locks is all that those
1259 those servers support) */
1260 vol->mand_lock = 1;
1da177e4
LT		 1261 } else if (strnicmp(data, "setuids", 7) == 0) {
1262 vol->setuids = 1;
1263 } else if (strnicmp(data, "nosetuids", 9) == 0) {
1264 vol->setuids = 0;
d0a9c078
JL		 1265 } else if (strnicmp(data, "dynperm", 7) == 0) {
1266 vol->dynperm = true;
1267 } else if (strnicmp(data, "nodynperm", 9) == 0) {
1268 vol->dynperm = false;
1da177e4
LT		 1269 } else if (strnicmp(data, "nohard", 6) == 0) {
1270 vol->retry = 0;
1271 } else if (strnicmp(data, "nosoft", 6) == 0) {
1272 vol->retry = 1;
1273 } else if (strnicmp(data, "nointr", 6) == 0) {
1274 vol->intr = 0;
1275 } else if (strnicmp(data, "intr", 4) == 0) {
1276 vol->intr = 1;
50c2f753 1277 } else if (strnicmp(data, "serverino", 7) == 0) {
1da177e4 1278 vol->server_ino = 1;
50c2f753 1279 } else if (strnicmp(data, "noserverino", 9) == 0) {
1da177e4 1280 vol->server_ino = 0;
50c2f753 1281 } else if (strnicmp(data, "cifsacl", 7) == 0) {
0a4b92c0
SF		 1282 vol->cifs_acl = 1;
1283 } else if (strnicmp(data, "nocifsacl", 9) == 0) {
1284 vol->cifs_acl = 0;
50c2f753 1285 } else if (strnicmp(data, "acl", 3) == 0) {
1da177e4 1286 vol->no_psx_acl = 0;
50c2f753 1287 } else if (strnicmp(data, "noacl", 5) == 0) {
1da177e4 1288 vol->no_psx_acl = 1;
84210e91
SF		 1289#ifdef CONFIG_CIFS_EXPERIMENTAL
1290 } else if (strnicmp(data, "locallease", 6) == 0) {
1291 vol->local_lease = 1;
1292#endif
50c2f753 1293 } else if (strnicmp(data, "sign", 4) == 0) {
750d1151 1294 vol->secFlg |= CIFSSEC_MUST_SIGN;
95b1cb90
SF		 1295 } else if (strnicmp(data, "seal", 4) == 0) {
1296 /* we do not do the following in secFlags because seal
1297 is a per tree connection (mount) not a per socket
1298 or per-smb connection option in the protocol */
1299 /* vol->secFlg |= CIFSSEC_MUST_SEAL; */
1300 vol->seal = 1;
50c2f753 1301 } else if (strnicmp(data, "direct", 6) == 0) {
1da177e4 1302 vol->direct_io = 1;
50c2f753 1303 } else if (strnicmp(data, "forcedirectio", 13) == 0) {
1da177e4 1304 vol->direct_io = 1;
50c2f753 1305 } else if (strnicmp(data, "in6_addr", 8) == 0) {
1da177e4
LT		 1306 if (!value || !*value) {
1307 vol->in6_addr = NULL;
1308 } else if (strnlen(value, 49) == 48) {
1309 vol->in6_addr = value;
1310 } else {
50c2f753
SF		 1311 printk(KERN_WARNING "CIFS: ip v6 address not "
1312 "48 characters long\n");
1da177e4
LT		 1313 return 1;
1314 }
1315 } else if (strnicmp(data, "noac", 4) == 0) {
50c2f753
SF		 1316 printk(KERN_WARNING "CIFS: Mount option noac not "
1317 "supported. Instead set "
1318 "/proc/fs/cifs/LookupCacheEnabled to 0\n");
1da177e4 1319 } else
50c2f753
SF		 1320 printk(KERN_WARNING "CIFS: Unknown mount option %s\n",
1321 data);
1da177e4
LT		 1322 }
1323 if (vol->UNC == NULL) {
4523cc30 1324 if (devname == NULL) {
50c2f753
SF		 1325 printk(KERN_WARNING "CIFS: Missing UNC name for mount "
1326 "target\n");
1da177e4
LT		 1327 return 1;
1328 }
1329 if ((temp_len = strnlen(devname, 300)) < 300) {
50c2f753 1330 vol->UNC = kmalloc(temp_len+1, GFP_KERNEL);
4523cc30 1331 if (vol->UNC == NULL)
1da177e4 1332 return 1;
50c2f753 1333 strcpy(vol->UNC, devname);
1da177e4
LT		 1334 if (strncmp(vol->UNC, "//", 2) == 0) {
1335 vol->UNC[0] = '\\';
1336 vol->UNC[1] = '\\';
1337 } else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
50c2f753
SF		 1338 printk(KERN_WARNING "CIFS: UNC Path does not "
1339 "begin with // or \\\\ \n");
1da177e4
LT		 1340 return 1;
1341 }
7c5e628f
IM		 1342 value = strpbrk(vol->UNC+2, "/\\");
1343 if (value)
1344 *value = '\\';
1da177e4
LT		 1345 } else {
1346 printk(KERN_WARNING "CIFS: UNC name too long\n");
1347 return 1;
1348 }
1349 }
fb8c4b14 1350 if (vol->UNCip == NULL)
1da177e4
LT		 1351 vol->UNCip = &vol->UNC[2];
1352
1353 return 0;
1354}
1355
e7ddee90
JL		 1356static struct TCP_Server_Info *
1357cifs_find_tcp_session(struct sockaddr *addr)
1da177e4
LT		 1358{
1359 struct list_head *tmp;
e7ddee90
JL		 1360 struct TCP_Server_Info *server;
1361 struct sockaddr_in *addr4 = (struct sockaddr_in *) addr;
1362 struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *) addr;
1363
1364 write_lock(&cifs_tcp_ses_lock);
1365 list_for_each(tmp, &cifs_tcp_ses_list) {
1366 server = list_entry(tmp, struct TCP_Server_Info,
1367 tcp_ses_list);
e7ddee90
JL		 1368 /*
1369 * the demux thread can exit on its own while still in CifsNew
1370 * so don't accept any sockets in that state. Since the
1371 * tcpStatus never changes back to CifsNew it's safe to check
1372 * for this without a lock.
1373 */
1374 if (server->tcpStatus == CifsNew)
1b20d672 1375 continue;
1da177e4 1376
e7ddee90
JL		 1377 if (addr->sa_family == AF_INET &&
1378 (addr4->sin_addr.s_addr !=
1379 server->addr.sockAddr.sin_addr.s_addr))
1380 continue;
1381 else if (addr->sa_family == AF_INET6 &&
1382 memcmp(&server->addr.sockAddr6.sin6_addr,
1383 &addr6->sin6_addr, sizeof(addr6->sin6_addr)))
1b20d672
CG		 1384 continue;
1385
e7ddee90
JL		 1386 ++server->srv_count;
1387 write_unlock(&cifs_tcp_ses_lock);
d82c2df5 1388 cFYI(1, ("Existing tcp session with server found"));
e7ddee90 1389 return server;
1da177e4 1390 }
e7ddee90 1391 write_unlock(&cifs_tcp_ses_lock);
1da177e4
LT		 1392 return NULL;
1393}
1b20d672 1394
14fbf50d 1395static void
e7ddee90 1396cifs_put_tcp_session(struct TCP_Server_Info *server)
1da177e4 1397{
e7ddee90 1398 struct task_struct *task;
1b20d672 1399
e7ddee90
JL		 1400 write_lock(&cifs_tcp_ses_lock);
1401 if (--server->srv_count > 0) {
1402 write_unlock(&cifs_tcp_ses_lock);
1403 return;
1da177e4 1404 }
1b20d672 1405
e7ddee90
JL		 1406 list_del_init(&server->tcp_ses_list);
1407 write_unlock(&cifs_tcp_ses_lock);
dea570e0 1408
e7ddee90
JL		 1409 spin_lock(&GlobalMid_Lock);
1410 server->tcpStatus = CifsExiting;
1411 spin_unlock(&GlobalMid_Lock);
dea570e0 1412
e7ddee90
JL		 1413 task = xchg(&server->tsk, NULL);
1414 if (task)
1415 force_sig(SIGKILL, task);
1da177e4
LT		 1416}
1417
63c038c2
JL		 1418static struct TCP_Server_Info *
1419cifs_get_tcp_session(struct smb_vol *volume_info)
1420{
1421 struct TCP_Server_Info *tcp_ses = NULL;
1422 struct sockaddr addr;
1423 struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr;
1424 struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr;
1425 int rc;
1426
1427 memset(&addr, 0, sizeof(struct sockaddr));
1428
1429 if (volume_info->UNCip && volume_info->UNC) {
1430 rc = cifs_inet_pton(AF_INET, volume_info->UNCip,
1431 &sin_server->sin_addr.s_addr);
1432
1433 if (rc <= 0) {
1434 /* not ipv4 address, try ipv6 */
1435 rc = cifs_inet_pton(AF_INET6, volume_info->UNCip,
1436 &sin_server6->sin6_addr.in6_u);
1437 if (rc > 0)
1438 addr.sa_family = AF_INET6;
1439 } else {
1440 addr.sa_family = AF_INET;
1441 }
1442
1443 if (rc <= 0) {
1444 /* we failed translating address */
1445 rc = -EINVAL;
1446 goto out_err;
1447 }
1448
1449 cFYI(1, ("UNC: %s ip: %s", volume_info->UNC,
1450 volume_info->UNCip));
1451 } else if (volume_info->UNCip) {
1452 /* BB using ip addr as tcp_ses name to connect to the
1453 DFS root below */
1454 cERROR(1, ("Connecting to DFS root not implemented yet"));
1455 rc = -EINVAL;
1456 goto out_err;
1457 } else /* which tcp_sess DFS root would we conect to */ {
1458 cERROR(1,
1459 ("CIFS mount error: No UNC path (e.g. -o "
1460 "unc=//192.168.1.100/public) specified"));
1461 rc = -EINVAL;
1462 goto out_err;
1463 }
1464
1465 /* see if we already have a matching tcp_ses */
1466 tcp_ses = cifs_find_tcp_session(&addr);
1467 if (tcp_ses)
1468 return tcp_ses;
1469
1470 tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL);
1471 if (!tcp_ses) {
1472 rc = -ENOMEM;
1473 goto out_err;
1474 }
1475
1476 tcp_ses->hostname = extract_hostname(volume_info->UNC);
1477 if (IS_ERR(tcp_ses->hostname)) {
1478 rc = PTR_ERR(tcp_ses->hostname);
1479 goto out_err;
1480 }
1481
1482 tcp_ses->noblocksnd = volume_info->noblocksnd;
1483 tcp_ses->noautotune = volume_info->noautotune;
1484 atomic_set(&tcp_ses->inFlight, 0);
1485 init_waitqueue_head(&tcp_ses->response_q);
1486 init_waitqueue_head(&tcp_ses->request_q);
1487 INIT_LIST_HEAD(&tcp_ses->pending_mid_q);
1488 mutex_init(&tcp_ses->srv_mutex);
1489 memcpy(tcp_ses->workstation_RFC1001_name,
1490 volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1491 memcpy(tcp_ses->server_RFC1001_name,
1492 volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
1493 tcp_ses->sequence_number = 0;
1494 INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
1495 INIT_LIST_HEAD(&tcp_ses->smb_ses_list);
1496
1497 /*
1498 * at this point we are the only ones with the pointer
1499 * to the struct since the kernel thread not created yet
1500 * no need to spinlock this init of tcpStatus or srv_count
1501 */
1502 tcp_ses->tcpStatus = CifsNew;
1503 ++tcp_ses->srv_count;
1504
1505 if (addr.sa_family == AF_INET6) {
1506 cFYI(1, ("attempting ipv6 connect"));
1507 /* BB should we allow ipv6 on port 139? */
1508 /* other OS never observed in Wild doing 139 with v6 */
1509 memcpy(&tcp_ses->addr.sockAddr6, sin_server6,
1510 sizeof(struct sockaddr_in6));
1511 sin_server6->sin6_port = htons(volume_info->port);
d5c5605c 1512 rc = ipv6_connect(tcp_ses);
63c038c2
JL		 1513 } else {
1514 memcpy(&tcp_ses->addr.sockAddr, sin_server,
1515 sizeof(struct sockaddr_in));
1516 sin_server->sin_port = htons(volume_info->port);
bcf4b106 1517 rc = ipv4_connect(tcp_ses);
63c038c2
JL		 1518 }
1519 if (rc < 0) {
1520 cERROR(1, ("Error connecting to socket. Aborting operation"));
1521 goto out_err;
1522 }
1523
1524 /*
1525 * since we're in a cifs function already, we know that
1526 * this will succeed. No need for try_module_get().
1527 */
1528 __module_get(THIS_MODULE);
1529 tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread,
1530 tcp_ses, "cifsd");
1531 if (IS_ERR(tcp_ses->tsk)) {
1532 rc = PTR_ERR(tcp_ses->tsk);
1533 cERROR(1, ("error %d create cifsd thread", rc));
1534 module_put(THIS_MODULE);
1535 goto out_err;
1536 }
1537
1538 /* thread spawned, put it on the list */
1539 write_lock(&cifs_tcp_ses_lock);
1540 list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list);
1541 write_unlock(&cifs_tcp_ses_lock);
1542
1543 return tcp_ses;
1544
1545out_err:
1546 if (tcp_ses) {
1547 kfree(tcp_ses->hostname);
1548 if (tcp_ses->ssocket)
1549 sock_release(tcp_ses->ssocket);
1550 kfree(tcp_ses);
1551 }
1552 return ERR_PTR(rc);
1553}
1554
14fbf50d
JL		 1555static struct cifsSesInfo *
1556cifs_find_smb_ses(struct TCP_Server_Info *server, char *username)
1da177e4
LT		 1557{
1558 struct list_head *tmp;
14fbf50d 1559 struct cifsSesInfo *ses;
dea570e0 1560
14fbf50d
JL		 1561 write_lock(&cifs_tcp_ses_lock);
1562 list_for_each(tmp, &server->smb_ses_list) {
1563 ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list);
1564 if (strncmp(ses->userName, username, MAX_USERNAME_SIZE))
dea570e0
SF		 1565 continue;
1566
14fbf50d
JL		 1567 ++ses->ses_count;
1568 write_unlock(&cifs_tcp_ses_lock);
1569 return ses;
1570 }
1571 write_unlock(&cifs_tcp_ses_lock);
1572 return NULL;
1573}
dea570e0 1574
14fbf50d
JL		 1575static void
1576cifs_put_smb_ses(struct cifsSesInfo *ses)
1577{
1578 int xid;
1579 struct TCP_Server_Info *server = ses->server;
dea570e0 1580
14fbf50d
JL		 1581 write_lock(&cifs_tcp_ses_lock);
1582 if (--ses->ses_count > 0) {
1583 write_unlock(&cifs_tcp_ses_lock);
1584 return;
1585 }
dea570e0 1586
14fbf50d
JL		 1587 list_del_init(&ses->smb_ses_list);
1588 write_unlock(&cifs_tcp_ses_lock);
dea570e0 1589
14fbf50d
JL		 1590 if (ses->status == CifsGood) {
1591 xid = GetXid();
1592 CIFSSMBLogoff(xid, ses);
1593 _FreeXid(xid);
1594 }
1595 sesInfoFree(ses);
1596 cifs_put_tcp_session(server);
1597}
dea570e0 1598
f1987b44
JL		 1599static struct cifsTconInfo *
1600cifs_find_tcon(struct cifsSesInfo *ses, const char *unc)
1601{
1602 struct list_head *tmp;
1603 struct cifsTconInfo *tcon;
1604
1605 write_lock(&cifs_tcp_ses_lock);
1606 list_for_each(tmp, &ses->tcon_list) {
1607 tcon = list_entry(tmp, struct cifsTconInfo, tcon_list);
1608 if (tcon->tidStatus == CifsExiting)
1609 continue;
1610 if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE))
dea570e0
SF		 1611 continue;
1612
f1987b44
JL		 1613 ++tcon->tc_count;
1614 write_unlock(&cifs_tcp_ses_lock);
dea570e0 1615 return tcon;
1da177e4 1616 }
f1987b44 1617 write_unlock(&cifs_tcp_ses_lock);
1da177e4
LT		 1618 return NULL;
1619}
1620
f1987b44
JL		 1621static void
1622cifs_put_tcon(struct cifsTconInfo *tcon)
1623{
1624 int xid;
1625 struct cifsSesInfo *ses = tcon->ses;
1626
1627 write_lock(&cifs_tcp_ses_lock);
1628 if (--tcon->tc_count > 0) {
1629 write_unlock(&cifs_tcp_ses_lock);
1630 return;
1631 }
1632
1633 list_del_init(&tcon->tcon_list);
1634 write_unlock(&cifs_tcp_ses_lock);
1635
1636 xid = GetXid();
1637 CIFSSMBTDis(xid, tcon);
1638 _FreeXid(xid);
1639
1640 DeleteTconOplockQEntries(tcon);
1641 tconInfoFree(tcon);
1642 cifs_put_smb_ses(ses);
1643}
1644
1da177e4 1645int
50c2f753
SF		 1646get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path,
1647 const struct nls_table *nls_codepage, unsigned int *pnum_referrals,
366781c1 1648 struct dfs_info3_param **preferrals, int remap)
1da177e4
LT		 1649{
1650 char *temp_unc;
1651 int rc = 0;
1652
1653 *pnum_referrals = 0;
366781c1 1654 *preferrals = NULL;
1da177e4
LT		 1655
1656 if (pSesInfo->ipc_tid == 0) {
1657 temp_unc = kmalloc(2 /* for slashes */ +
50c2f753
SF		 1658 strnlen(pSesInfo->serverName,
1659 SERVER_NAME_LEN_WITH_NULL * 2)
1da177e4
LT		 1660 + 1 + 4 /* slash IPC$ */ + 2,
1661 GFP_KERNEL);
1662 if (temp_unc == NULL)
1663 return -ENOMEM;
1664 temp_unc[0] = '\\';
1665 temp_unc[1] = '\\';
1666 strcpy(temp_unc + 2, pSesInfo->serverName);
1667 strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
1668 rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
1669 cFYI(1,
50c2f753 1670 ("CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid));
1da177e4
LT		 1671 kfree(temp_unc);
1672 }
1673 if (rc == 0)
c2cf07d5 1674 rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
737b758c 1675 pnum_referrals, nls_codepage, remap);
366781c1
SF		 1676 /* BB map targetUNCs to dfs_info3 structures, here or
1677 in CIFSGetDFSRefer BB */
1da177e4
LT		 1678
1679 return rc;
1680}
1681
09e50d55
JL		 1682#ifdef CONFIG_DEBUG_LOCK_ALLOC
1683static struct lock_class_key cifs_key[2];
1684static struct lock_class_key cifs_slock_key[2];
1685
1686static inline void
1687cifs_reclassify_socket4(struct socket *sock)
1688{
1689 struct sock *sk = sock->sk;
1690 BUG_ON(sock_owned_by_user(sk));
1691 sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS",
1692 &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]);
1693}
1694
1695static inline void
1696cifs_reclassify_socket6(struct socket *sock)
1697{
1698 struct sock *sk = sock->sk;
1699 BUG_ON(sock_owned_by_user(sk));
1700 sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS",
1701 &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]);
1702}
1703#else
1704static inline void
1705cifs_reclassify_socket4(struct socket *sock)
1706{
1707}
1708
1709static inline void
1710cifs_reclassify_socket6(struct socket *sock)
1711{
1712}
1713#endif
1714
1da177e4 1715/* See RFC1001 section 14 on representation of Netbios names */
50c2f753 1716static void rfc1002mangle(char *target, char *source, unsigned int length)
1da177e4 1717{
50c2f753 1718 unsigned int i, j;
1da177e4 1719
50c2f753 1720 for (i = 0, j = 0; i < (length); i++) {
1da177e4
LT		 1721 /* mask a nibble at a time and encode */
1722 target[j] = 'A' + (0x0F & (source[i] >> 4));
1723 target[j+1] = 'A' + (0x0F & source[i]);
50c2f753 1724 j += 2;
1da177e4
LT		 1725 }
1726
1727}
1728
1729
1730static int
bcf4b106 1731ipv4_connect(struct TCP_Server_Info *server)
1da177e4
LT		 1732{
1733 int rc = 0;
bcf4b106 1734 bool connected = false;
1da177e4 1735 __be16 orig_port = 0;
bcf4b106 1736 struct socket *socket = server->ssocket;
1da177e4 1737
bcf4b106 1738 if (socket == NULL) {
50c2f753 1739 rc = sock_create_kern(PF_INET, SOCK_STREAM,
bcf4b106 1740 IPPROTO_TCP, &socket);
1da177e4 1741 if (rc < 0) {
50c2f753 1742 cERROR(1, ("Error %d creating socket", rc));
1da177e4 1743 return rc;
1da177e4 1744 }
bcf4b106
JL		 1745
1746 /* BB other socket options to set KEEPALIVE, NODELAY? */
1747 cFYI(1, ("Socket created"));
1748 server->ssocket = socket;
1749 socket->sk->sk_allocation = GFP_NOFS;
1750 cifs_reclassify_socket4(socket);
1da177e4
LT		 1751 }
1752
bcf4b106
JL		 1753 /* user overrode default port */
1754 if (server->addr.sockAddr.sin_port) {
1755 rc = socket->ops->connect(socket, (struct sockaddr *)
1756 &server->addr.sockAddr,
1757 sizeof(struct sockaddr_in), 0);
1da177e4 1758 if (rc >= 0)
bcf4b106 1759 connected = true;
50c2f753 1760 }
1da177e4 1761
fb8c4b14 1762 if (!connected) {
50c2f753 1763 /* save original port so we can retry user specified port
1da177e4 1764 later if fall back ports fail this time */
bcf4b106 1765 orig_port = server->addr.sockAddr.sin_port;
1da177e4
LT		 1766
1767 /* do not retry on the same port we just failed on */
bcf4b106
JL		 1768 if (server->addr.sockAddr.sin_port != htons(CIFS_PORT)) {
1769 server->addr.sockAddr.sin_port = htons(CIFS_PORT);
1770 rc = socket->ops->connect(socket,
1771 (struct sockaddr *)
1772 &server->addr.sockAddr,
1773 sizeof(struct sockaddr_in), 0);
1da177e4 1774 if (rc >= 0)
bcf4b106 1775 connected = true;
1da177e4
LT		 1776 }
1777 }
1778 if (!connected) {
bcf4b106
JL		 1779 server->addr.sockAddr.sin_port = htons(RFC1001_PORT);
1780 rc = socket->ops->connect(socket, (struct sockaddr *)
1781 &server->addr.sockAddr,
6345a3a8 1782 sizeof(struct sockaddr_in), 0);
50c2f753 1783 if (rc >= 0)
bcf4b106 1784 connected = true;
1da177e4
LT		 1785 }
1786
1787 /* give up here - unless we want to retry on different
1788 protocol families some day */
1789 if (!connected) {
fb8c4b14 1790 if (orig_port)
bcf4b106 1791 server->addr.sockAddr.sin_port = orig_port;
50c2f753 1792 cFYI(1, ("Error %d connecting to server via ipv4", rc));
bcf4b106
JL		 1793 sock_release(socket);
1794 server->ssocket = NULL;
1da177e4
LT		 1795 return rc;
1796 }
bcf4b106
JL		 1797
1798
1799 /*
1800 * Eventually check for other socket options to change from
1801 * the default. sock_setsockopt not used because it expects
1802 * user space buffer
1803 */
1804 socket->sk->sk_rcvtimeo = 7 * HZ;
1805 socket->sk->sk_sndtimeo = 3 * HZ;
edf1ae40 1806
b387eaeb 1807 /* make the bufsizes depend on wsize/rsize and max requests */
bcf4b106
JL		 1808 if (server->noautotune) {
1809 if (socket->sk->sk_sndbuf < (200 * 1024))
1810 socket->sk->sk_sndbuf = 200 * 1024;
1811 if (socket->sk->sk_rcvbuf < (140 * 1024))
1812 socket->sk->sk_rcvbuf = 140 * 1024;
edf1ae40 1813 }
1da177e4 1814
bcf4b106
JL		 1815 cFYI(1, ("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",
1816 socket->sk->sk_sndbuf,
1817 socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo));
1818
1da177e4 1819 /* send RFC1001 sessinit */
bcf4b106 1820 if (server->addr.sockAddr.sin_port == htons(RFC1001_PORT)) {
1da177e4 1821 /* some servers require RFC1001 sessinit before sending
50c2f753 1822 negprot - BB check reconnection in case where second
1da177e4 1823 sessinit is sent but no second negprot */
50c2f753
SF		 1824 struct rfc1002_session_packet *ses_init_buf;
1825 struct smb_hdr *smb_buf;
1826 ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet),
1827 GFP_KERNEL);
fb8c4b14 1828 if (ses_init_buf) {
1da177e4 1829 ses_init_buf->trailer.session_req.called_len = 32;
bcf4b106
JL		 1830 if (server->server_RFC1001_name &&
1831 server->server_RFC1001_name[0] != 0)
8ecaf67a
JL		 1832 rfc1002mangle(ses_init_buf->trailer.
1833 session_req.called_name,
bcf4b106 1834 server->server_RFC1001_name,
8ecaf67a 1835 RFC1001_NAME_LEN_WITH_NULL);
bcf4b106 1836 else
8ecaf67a
JL		 1837 rfc1002mangle(ses_init_buf->trailer.
1838 session_req.called_name,
1839 DEFAULT_CIFS_CALLED_NAME,
1840 RFC1001_NAME_LEN_WITH_NULL);
a10faeb2 1841
1da177e4 1842 ses_init_buf->trailer.session_req.calling_len = 32;
bcf4b106 1843
1da177e4
LT		 1844 /* calling name ends in null (byte 16) from old smb
1845 convention. */
bcf4b106
JL		 1846 if (server->workstation_RFC1001_name &&
1847 server->workstation_RFC1001_name[0] != 0)
8ecaf67a
JL		 1848 rfc1002mangle(ses_init_buf->trailer.
1849 session_req.calling_name,
bcf4b106 1850 server->workstation_RFC1001_name,
8ecaf67a 1851 RFC1001_NAME_LEN_WITH_NULL);
bcf4b106 1852 else
8ecaf67a
JL		 1853 rfc1002mangle(ses_init_buf->trailer.
1854 session_req.calling_name,
1855 "LINUX_CIFS_CLNT",
1856 RFC1001_NAME_LEN_WITH_NULL);
bcf4b106 1857
1da177e4
LT		 1858 ses_init_buf->trailer.session_req.scope1 = 0;
1859 ses_init_buf->trailer.session_req.scope2 = 0;
1860 smb_buf = (struct smb_hdr *)ses_init_buf;
1861 /* sizeof RFC1002_SESSION_REQUEST with no scope */
1862 smb_buf->smb_buf_length = 0x81000044;
bcf4b106
JL		 1863 rc = smb_send(socket, smb_buf, 0x44,
1864 (struct sockaddr *) &server->addr.sockAddr,
1865 server->noblocksnd);
1da177e4 1866 kfree(ses_init_buf);
50c2f753 1867 msleep(1); /* RFC1001 layer in at least one server
083d3a2c
SF		 1868 requires very short break before negprot
1869 presumably because not expecting negprot
1870 to follow so fast. This is a simple
50c2f753 1871 solution that works without
083d3a2c
SF		 1872 complicating the code and causes no
1873 significant slowing down on mount
1874 for everyone else */
1da177e4 1875 }
50c2f753 1876 /* else the negprot may still work without this
1da177e4 1877 even though malloc failed */
50c2f753 1878
1da177e4 1879 }
50c2f753 1880
1da177e4
LT		 1881 return rc;
1882}
1883
1884static int
d5c5605c 1885ipv6_connect(struct TCP_Server_Info *server)
1da177e4
LT		 1886{
1887 int rc = 0;
d5c5605c 1888 bool connected = false;
1da177e4 1889 __be16 orig_port = 0;
d5c5605c 1890 struct socket *socket = server->ssocket;
1da177e4 1891
d5c5605c 1892 if (socket == NULL) {
50c2f753 1893 rc = sock_create_kern(PF_INET6, SOCK_STREAM,
d5c5605c 1894 IPPROTO_TCP, &socket);
1da177e4 1895 if (rc < 0) {
50c2f753 1896 cERROR(1, ("Error %d creating ipv6 socket", rc));
d5c5605c 1897 socket = NULL;
1da177e4 1898 return rc;
1da177e4 1899 }
1da177e4 1900
d5c5605c
JL		 1901 /* BB other socket options to set KEEPALIVE, NODELAY? */
1902 cFYI(1, ("ipv6 Socket created"));
1903 server->ssocket = socket;
1904 socket->sk->sk_allocation = GFP_NOFS;
1905 cifs_reclassify_socket6(socket);
1906 }
1da177e4 1907
d5c5605c
JL		 1908 /* user overrode default port */
1909 if (server->addr.sockAddr6.sin6_port) {
1910 rc = socket->ops->connect(socket,
1911 (struct sockaddr *) &server->addr.sockAddr6,
6345a3a8 1912 sizeof(struct sockaddr_in6), 0);
1da177e4 1913 if (rc >= 0)
d5c5605c 1914 connected = true;
50c2f753 1915 }
1da177e4 1916
fb8c4b14 1917 if (!connected) {
50c2f753 1918 /* save original port so we can retry user specified port
1da177e4
LT		 1919 later if fall back ports fail this time */
1920
d5c5605c 1921 orig_port = server->addr.sockAddr6.sin6_port;
1da177e4 1922 /* do not retry on the same port we just failed on */
d5c5605c
JL		 1923 if (server->addr.sockAddr6.sin6_port != htons(CIFS_PORT)) {
1924 server->addr.sockAddr6.sin6_port = htons(CIFS_PORT);
1925 rc = socket->ops->connect(socket, (struct sockaddr *)
1926 &server->addr.sockAddr6,
6345a3a8 1927 sizeof(struct sockaddr_in6), 0);
1da177e4 1928 if (rc >= 0)
d5c5605c 1929 connected = true;
1da177e4
LT		 1930 }
1931 }
1932 if (!connected) {
d5c5605c
JL		 1933 server->addr.sockAddr6.sin6_port = htons(RFC1001_PORT);
1934 rc = socket->ops->connect(socket, (struct sockaddr *)
1935 &server->addr.sockAddr6,
1936 sizeof(struct sockaddr_in6), 0);
50c2f753 1937 if (rc >= 0)
d5c5605c 1938 connected = true;
1da177e4
LT		 1939 }
1940
1941 /* give up here - unless we want to retry on different
1942 protocol families some day */
1943 if (!connected) {
fb8c4b14 1944 if (orig_port)
d5c5605c 1945 server->addr.sockAddr6.sin6_port = orig_port;
50c2f753 1946 cFYI(1, ("Error %d connecting to server via ipv6", rc));
d5c5605c
JL		 1947 sock_release(socket);
1948 server->ssocket = NULL;
1da177e4
LT		 1949 return rc;
1950 }
edf1ae40 1951
d5c5605c
JL		 1952 /*
1953 * Eventually check for other socket options to change from
1954 * the default. sock_setsockopt not used because it expects
1955 * user space buffer
1956 */
1957 socket->sk->sk_rcvtimeo = 7 * HZ;
1958 socket->sk->sk_sndtimeo = 3 * HZ;
1959 server->ssocket = socket;
50c2f753 1960
1da177e4
LT		 1961 return rc;
1962}
1963
50c2f753
SF		 1964void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon,
1965 struct super_block *sb, struct smb_vol *vol_info)
8af18971
SF		 1966{
1967 /* if we are reconnecting then should we check to see if
1968 * any requested capabilities changed locally e.g. via
1969 * remount but we can not do much about it here
1970 * if they have (even if we could detect it by the following)
1971 * Perhaps we could add a backpointer to array of sb from tcon
1972 * or if we change to make all sb to same share the same
1973 * sb as NFS - then we only have one backpointer to sb.
1974 * What if we wanted to mount the server share twice once with
1975 * and once without posixacls or posix paths? */
1976 __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
50c2f753 1977
c18c842b
SF		 1978 if (vol_info && vol_info->no_linux_ext) {
1979 tcon->fsUnixInfo.Capability = 0;
1980 tcon->unix_ext = 0; /* Unix Extensions disabled */
1981 cFYI(1, ("Linux protocol extensions disabled"));
1982 return;
1983 } else if (vol_info)
1984 tcon->unix_ext = 1; /* Unix Extensions supported */
1985
1986 if (tcon->unix_ext == 0) {
1987 cFYI(1, ("Unix extensions disabled so not set on reconnect"));
1988 return;
1989 }
50c2f753 1990
fb8c4b14 1991 if (!CIFSSMBQFSUnixInfo(xid, tcon)) {
8af18971 1992 __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
50c2f753 1993
8af18971
SF		 1994 /* check for reconnect case in which we do not
1995 want to change the mount behavior if we can avoid it */
fb8c4b14 1996 if (vol_info == NULL) {
50c2f753 1997 /* turn off POSIX ACL and PATHNAMES if not set
8af18971
SF		 1998 originally at mount time */
1999 if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
2000 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
11b6d645
IM		 2001 if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2002 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
2003 cERROR(1, ("POSIXPATH support change"));
8af18971 2004 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
11b6d645
IM		 2005 } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) {
2006 cERROR(1, ("possible reconnect error"));
2007 cERROR(1,
2008 ("server disabled POSIX path support"));
2009 }
8af18971 2010 }
50c2f753 2011
8af18971 2012 cap &= CIFS_UNIX_CAP_MASK;
75865f8c 2013 if (vol_info && vol_info->no_psx_acl)
8af18971 2014 cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
75865f8c 2015 else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
fb8c4b14
SF		 2016 cFYI(1, ("negotiated posix acl support"));
2017 if (sb)
8af18971
SF		 2018 sb->s_flags |= MS_POSIXACL;
2019 }
2020
75865f8c 2021 if (vol_info && vol_info->posix_paths == 0)
8af18971 2022 cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
75865f8c 2023 else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
fb8c4b14 2024 cFYI(1, ("negotiate posix pathnames"));
75865f8c 2025 if (sb)
50c2f753 2026 CIFS_SB(sb)->mnt_cifs_flags |=
8af18971
SF		 2027 CIFS_MOUNT_POSIX_PATHS;
2028 }
50c2f753 2029
984acfe1
SF		 2030 /* We might be setting the path sep back to a different
2031 form if we are reconnecting and the server switched its
50c2f753 2032 posix path capability for this share */
75865f8c 2033 if (sb && (CIFS_SB(sb)->prepathlen > 0))
984acfe1 2034 CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
75865f8c
SF		 2035
2036 if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
2037 if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
2038 CIFS_SB(sb)->rsize = 127 * 1024;
90c81e0b
SF		 2039 cFYI(DBG2,
2040 ("larger reads not supported by srv"));
75865f8c
SF		 2041 }
2042 }
50c2f753
SF		 2043
2044
2045 cFYI(1, ("Negotiate caps 0x%x", (int)cap));
8af18971 2046#ifdef CONFIG_CIFS_DEBUG2
75865f8c 2047 if (cap & CIFS_UNIX_FCNTL_CAP)
fb8c4b14 2048 cFYI(1, ("FCNTL cap"));
75865f8c 2049 if (cap & CIFS_UNIX_EXTATTR_CAP)
fb8c4b14 2050 cFYI(1, ("EXTATTR cap"));
75865f8c 2051 if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
fb8c4b14 2052 cFYI(1, ("POSIX path cap"));
75865f8c 2053 if (cap & CIFS_UNIX_XATTR_CAP)
fb8c4b14 2054 cFYI(1, ("XATTR cap"));
75865f8c 2055 if (cap & CIFS_UNIX_POSIX_ACL_CAP)
fb8c4b14 2056 cFYI(1, ("POSIX ACL cap"));
75865f8c 2057 if (cap & CIFS_UNIX_LARGE_READ_CAP)
fb8c4b14 2058 cFYI(1, ("very large read cap"));
75865f8c 2059 if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
fb8c4b14 2060 cFYI(1, ("very large write cap"));
8af18971
SF		 2061#endif /* CIFS_DEBUG2 */
2062 if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
442aa310 2063 if (vol_info == NULL) {
5a44b319 2064 cFYI(1, ("resetting capabilities failed"));
442aa310 2065 } else
5a44b319
SF		 2066 cERROR(1, ("Negotiating Unix capabilities "
2067 "with the server failed. Consider "
2068 "mounting with the Unix Extensions\n"
2069 "disabled, if problems are found, "
2070 "by specifying the nounix mount "
2224f4e5 2071 "option."));
5a44b319 2072
8af18971
SF		 2073 }
2074 }
2075}
2076
03a143c9
SF		 2077static void
2078convert_delimiter(char *path, char delim)
2079{
2080 int i;
c2d68ea6 2081 char old_delim;
03a143c9
SF		 2082
2083 if (path == NULL)
2084 return;
2085
582d21e5 2086 if (delim == '/')
c2d68ea6
SF		 2087 old_delim = '\\';
2088 else
2089 old_delim = '/';
2090
03a143c9 2091 for (i = 0; path[i] != '\0'; i++) {
c2d68ea6 2092 if (path[i] == old_delim)
03a143c9
SF		 2093 path[i] = delim;
2094 }
2095}
2096
3b795210
SF		 2097static void setup_cifs_sb(struct smb_vol *pvolume_info,
2098 struct cifs_sb_info *cifs_sb)
b1c8d2b4 2099{
3b795210
SF		 2100 if (pvolume_info->rsize > CIFSMaxBufSize) {
2101 cERROR(1, ("rsize %d too large, using MaxBufSize",
2102 pvolume_info->rsize));
2103 cifs_sb->rsize = CIFSMaxBufSize;
2104 } else if ((pvolume_info->rsize) &&
2105 (pvolume_info->rsize <= CIFSMaxBufSize))
2106 cifs_sb->rsize = pvolume_info->rsize;
2107 else /* default */
2108 cifs_sb->rsize = CIFSMaxBufSize;
2109
2110 if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
2111 cERROR(1, ("wsize %d too large, using 4096 instead",
2112 pvolume_info->wsize));
2113 cifs_sb->wsize = 4096;
2114 } else if (pvolume_info->wsize)
2115 cifs_sb->wsize = pvolume_info->wsize;
2116 else
2117 cifs_sb->wsize = min_t(const int,
2118 PAGEVEC_SIZE * PAGE_CACHE_SIZE,
2119 127*1024);
2120 /* old default of CIFSMaxBufSize was too small now
2121 that SMB Write2 can send multiple pages in kvec.
2122 RFC1001 does not describe what happens when frame
2123 bigger than 128K is sent so use that as max in
2124 conjunction with 52K kvec constraint on arch with 4K
2125 page size */
2126
2127 if (cifs_sb->rsize < 2048) {
2128 cifs_sb->rsize = 2048;
2129 /* Windows ME may prefer this */
2130 cFYI(1, ("readsize set to minimum: 2048"));
2131 }
2132 /* calculate prepath */
2133 cifs_sb->prepath = pvolume_info->prepath;
2134 if (cifs_sb->prepath) {
2135 cifs_sb->prepathlen = strlen(cifs_sb->prepath);
2136 /* we can not convert the / to \ in the path
2137 separators in the prefixpath yet because we do not
2138 know (until reset_cifs_unix_caps is called later)
2139 whether POSIX PATH CAP is available. We normalize
2140 the / to \ after reset_cifs_unix_caps is called */
2141 pvolume_info->prepath = NULL;
2142 } else
2143 cifs_sb->prepathlen = 0;
2144 cifs_sb->mnt_uid = pvolume_info->linux_uid;
2145 cifs_sb->mnt_gid = pvolume_info->linux_gid;
2146 cifs_sb->mnt_file_mode = pvolume_info->file_mode;
2147 cifs_sb->mnt_dir_mode = pvolume_info->dir_mode;
2148 cFYI(1, ("file mode: 0x%x dir mode: 0x%x",
2149 cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode));
2150
2151 if (pvolume_info->noperm)
2152 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
2153 if (pvolume_info->setuids)
2154 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
2155 if (pvolume_info->server_ino)
2156 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2157 if (pvolume_info->remap)
2158 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2159 if (pvolume_info->no_xattr)
2160 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2161 if (pvolume_info->sfu_emul)
2162 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2163 if (pvolume_info->nobrl)
2164 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
13a6e42a
SF		 2165 if (pvolume_info->mand_lock)
2166 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
3b795210
SF		 2167 if (pvolume_info->cifs_acl)
2168 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2169 if (pvolume_info->override_uid)
2170 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
2171 if (pvolume_info->override_gid)
2172 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
2173 if (pvolume_info->dynperm)
2174 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM;
2175 if (pvolume_info->direct_io) {
2176 cFYI(1, ("mounting share using direct i/o"));
2177 cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
2178 }
2179
2180 if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm))
2181 cERROR(1, ("mount option dynperm ignored if cifsacl "
2182 "mount option supported"));
b1c8d2b4
JL		 2183}
2184
1da177e4
LT		 2185int
2186cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
2187 char *mount_data, const char *devname)
2188{
2189 int rc = 0;
2190 int xid;
7586b765 2191 struct smb_vol *volume_info;
1da177e4 2192 struct cifsSesInfo *pSesInfo = NULL;
1da177e4
LT		 2193 struct cifsTconInfo *tcon = NULL;
2194 struct TCP_Server_Info *srvTcp = NULL;
2195
2196 xid = GetXid();
2197
7586b765
JL		 2198 volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
2199 if (!volume_info) {
2200 rc = -ENOMEM;
2201 goto out;
2202 }
50c2f753 2203
7586b765 2204 if (cifs_parse_mount_options(mount_data, devname, volume_info)) {
70fe7dc0
JL		 2205 rc = -EINVAL;
2206 goto out;
1da177e4
LT		 2207 }
2208
7586b765 2209 if (volume_info->nullauth) {
fb8c4b14 2210 cFYI(1, ("null user"));
7586b765
JL		 2211 volume_info->username = "";
2212 } else if (volume_info->username) {
1da177e4 2213 /* BB fixme parse for domain name here */
7586b765 2214 cFYI(1, ("Username: %s", volume_info->username));
1da177e4 2215 } else {
bf820679 2216 cifserror("No username specified");
50c2f753
SF		 2217 /* In userspace mount helper we can get user name from alternate
2218 locations such as env variables and files on disk */
70fe7dc0
JL		 2219 rc = -EINVAL;
2220 goto out;
1da177e4
LT		 2221 }
2222
1da177e4
LT		 2223
2224 /* this is needed for ASCII cp to Unicode converts */
7586b765 2225 if (volume_info->iocharset == NULL) {
1da177e4
LT		 2226 cifs_sb->local_nls = load_nls_default();
2227 /* load_nls_default can not return null */
2228 } else {
7586b765 2229 cifs_sb->local_nls = load_nls(volume_info->iocharset);
fb8c4b14 2230 if (cifs_sb->local_nls == NULL) {
50c2f753 2231 cERROR(1, ("CIFS mount error: iocharset %s not found",
7586b765 2232 volume_info->iocharset));
70fe7dc0
JL		 2233 rc = -ELIBACC;
2234 goto out;
1da177e4
LT		 2235 }
2236 }
2237
63c038c2 2238 /* get a reference to a tcp session */
7586b765 2239 srvTcp = cifs_get_tcp_session(volume_info);
63c038c2
JL		 2240 if (IS_ERR(srvTcp)) {
2241 rc = PTR_ERR(srvTcp);
2242 goto out;
1da177e4
LT		 2243 }
2244
7586b765 2245 pSesInfo = cifs_find_smb_ses(srvTcp, volume_info->username);
14fbf50d 2246 if (pSesInfo) {
1d9a8852
JL		 2247 cFYI(1, ("Existing smb sess found (status=%d)",
2248 pSesInfo->status));
14fbf50d
JL		 2249 /*
2250 * The existing SMB session already has a reference to srvTcp,
2251 * so we can put back the extra one we got before
2252 */
2253 cifs_put_tcp_session(srvTcp);
2254
88e7d705 2255 down(&pSesInfo->sesSem);
3b795210 2256 if (pSesInfo->need_reconnect) {
1d9a8852 2257 cFYI(1, ("Session needs reconnect"));
1d9a8852
JL		 2258 rc = cifs_setup_session(xid, pSesInfo,
2259 cifs_sb->local_nls);
1d9a8852 2260 }
88e7d705 2261 up(&pSesInfo->sesSem);
1da177e4 2262 } else if (!rc) {
bf820679 2263 cFYI(1, ("Existing smb sess not found"));
1da177e4 2264 pSesInfo = sesInfoAlloc();
14fbf50d 2265 if (pSesInfo == NULL) {
1da177e4 2266 rc = -ENOMEM;
14fbf50d 2267 goto mount_fail_check;
1da177e4
LT		 2268 }
2269
14fbf50d
JL		 2270 /* new SMB session uses our srvTcp ref */
2271 pSesInfo->server = srvTcp;
63c038c2 2272 if (srvTcp->addr.sockAddr6.sin6_family == AF_INET6)
8ecaf67a 2273 sprintf(pSesInfo->serverName, NIP6_FMT,
63c038c2 2274 NIP6(srvTcp->addr.sockAddr6.sin6_addr));
8ecaf67a
JL		 2275 else
2276 sprintf(pSesInfo->serverName, NIPQUAD_FMT,
63c038c2 2277 NIPQUAD(srvTcp->addr.sockAddr.sin_addr.s_addr));
14fbf50d
JL		 2278
2279 write_lock(&cifs_tcp_ses_lock);
2280 list_add(&pSesInfo->smb_ses_list, &srvTcp->smb_ses_list);
2281 write_unlock(&cifs_tcp_ses_lock);
2282
7586b765
JL		 2283 /* volume_info->password freed at unmount */
2284 if (volume_info->password) {
00e485b0
JL		 2285 pSesInfo->password = kstrdup(volume_info->password,
2286 GFP_KERNEL);
2287 if (!pSesInfo->password) {
2288 rc = -ENOMEM;
2289 goto mount_fail_check;
2290 }
14fbf50d 2291 }
7586b765
JL		 2292 if (volume_info->username)
2293 strncpy(pSesInfo->userName, volume_info->username,
14fbf50d 2294 MAX_USERNAME_SIZE);
7586b765
JL		 2295 if (volume_info->domainname) {
2296 int len = strlen(volume_info->domainname);
14fbf50d
JL		 2297 pSesInfo->domainName = kmalloc(len + 1, GFP_KERNEL);
2298 if (pSesInfo->domainName)
2299 strcpy(pSesInfo->domainName,
7586b765 2300 volume_info->domainname);
70fe7dc0 2301 }
7586b765
JL		 2302 pSesInfo->linux_uid = volume_info->linux_uid;
2303 pSesInfo->overrideSecFlg = volume_info->secFlg;
14fbf50d 2304 down(&pSesInfo->sesSem);
1da177e4 2305
14fbf50d
JL		 2306 /* BB FIXME need to pass vol->secFlgs BB */
2307 rc = cifs_setup_session(xid, pSesInfo,
2308 cifs_sb->local_nls);
2309 up(&pSesInfo->sesSem);
1da177e4 2310 }
50c2f753 2311
1da177e4
LT		 2312 /* search for existing tcon to this server share */
2313 if (!rc) {
7586b765 2314 setup_cifs_sb(volume_info, cifs_sb);
1da177e4 2315
7586b765 2316 tcon = cifs_find_tcon(pSesInfo, volume_info->UNC);
1da177e4 2317 if (tcon) {
bf820679 2318 cFYI(1, ("Found match on UNC path"));
f1987b44
JL		 2319 /* existing tcon already has a reference */
2320 cifs_put_smb_ses(pSesInfo);
7586b765 2321 if (tcon->seal != volume_info->seal)
95b1cb90
SF		 2322 cERROR(1, ("transport encryption setting "
2323 "conflicts with existing tid"));
1da177e4
LT		 2324 } else {
2325 tcon = tconInfoAlloc();
3b795210 2326 if (tcon == NULL) {
1da177e4 2327 rc = -ENOMEM;
3b795210
SF		 2328 goto mount_fail_check;
2329 }
00e485b0 2330
ab3f9929 2331 tcon->ses = pSesInfo;
00e485b0
JL		 2332 if (volume_info->password) {
2333 tcon->password = kstrdup(volume_info->password,
2334 GFP_KERNEL);
2335 if (!tcon->password) {
2336 rc = -ENOMEM;
2337 goto mount_fail_check;
2338 }
2339 }
3b795210
SF		 2340
2341 /* check for null share name ie connect to dfs root */
7586b765
JL		 2342 if ((strchr(volume_info->UNC + 3, '\\') == NULL)
2343 && (strchr(volume_info->UNC + 3, '/') == NULL)) {
3b795210
SF		 2344 /* rc = connect_to_dfs_path(...) */
2345 cFYI(1, ("DFS root not supported"));
2346 rc = -ENODEV;
2347 goto mount_fail_check;
2348 } else {
2349 /* BB Do we need to wrap sesSem around
2350 * this TCon call and Unix SetFS as
2351 * we do on SessSetup and reconnect? */
7586b765 2352 rc = CIFSTCon(xid, pSesInfo, volume_info->UNC,
3b795210
SF		 2353 tcon, cifs_sb->local_nls);
2354 cFYI(1, ("CIFS Tcon rc = %d", rc));
7586b765 2355 if (volume_info->nodfs) {
3b795210
SF		 2356 tcon->Flags &= ~SMB_SHARE_IS_IN_DFS;
2357 cFYI(1, ("DFS disabled (%d)",
2358 tcon->Flags));
1da177e4
LT		 2359 }
2360 }
14fbf50d 2361 if (rc)
3b795210 2362 goto mount_fail_check;
7586b765 2363 tcon->seal = volume_info->seal;
f1987b44
JL		 2364 write_lock(&cifs_tcp_ses_lock);
2365 list_add(&tcon->tcon_list, &pSesInfo->tcon_list);
2366 write_unlock(&cifs_tcp_ses_lock);
1da177e4 2367 }
3b795210
SF		 2368
2369 /* we can have only one retry value for a connection
2370 to a share so for resources mounted more than once
2371 to the same server share the last value passed in
2372 for the retry flag is used */
7586b765
JL		 2373 tcon->retry = volume_info->retry;
2374 tcon->nocase = volume_info->nocase;
2375 tcon->local_lease = volume_info->local_lease;
1da177e4 2376 }
4523cc30 2377 if (pSesInfo) {
1da177e4
LT		 2378 if (pSesInfo->capabilities & CAP_LARGE_FILES) {
2379 sb->s_maxbytes = (u64) 1 << 63;
2380 } else
2381 sb->s_maxbytes = (u64) 1 << 31; /* 2 GB */
2382 }
2383
8af18971 2384 /* BB FIXME fix time_gran to be larger for LANMAN sessions */
1da177e4
LT		 2385 sb->s_time_gran = 100;
2386
3b795210 2387mount_fail_check:
14fbf50d 2388 /* on error free sesinfo and tcon struct if needed */
1da177e4 2389 if (rc) {
e7ddee90
JL		 2390 /* If find_unc succeeded then rc == 0 so we can not end */
2391 /* up accidently freeing someone elses tcon struct */
2392 if (tcon)
f1987b44
JL		 2393 cifs_put_tcon(tcon);
2394 else if (pSesInfo)
14fbf50d 2395 cifs_put_smb_ses(pSesInfo);
c18c842b 2396 else
14fbf50d 2397 cifs_put_tcp_session(srvTcp);
d82c2df5
SF		 2398 goto out;
2399 }
d82c2df5 2400 cifs_sb->tcon = tcon;
c18c842b 2401
d82c2df5
SF		 2402 /* do not care if following two calls succeed - informational */
2403 if (!tcon->ipc) {
2404 CIFSSMBQFSDeviceInfo(xid, tcon);
2405 CIFSSMBQFSAttributeInfo(xid, tcon);
2406 }
03a143c9 2407
d82c2df5
SF		 2408 /* tell server which Unix caps we support */
2409 if (tcon->ses->capabilities & CAP_UNIX)
2410 /* reset of caps checks mount to see if unix extensions
2411 disabled for just this mount */
7586b765 2412 reset_cifs_unix_caps(xid, tcon, sb, volume_info);
d82c2df5
SF		 2413 else
2414 tcon->unix_ext = 0; /* server does not support them */
c18c842b 2415
d82c2df5
SF		 2416 /* convert forward to back slashes in prepath here if needed */
2417 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0)
2418 convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb));
03a143c9 2419
d82c2df5
SF		 2420 if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) {
2421 cifs_sb->rsize = 1024 * 127;
2422 cFYI(DBG2, ("no very large read support, rsize now 127K"));
1da177e4 2423 }
d82c2df5
SF		 2424 if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
2425 cifs_sb->wsize = min(cifs_sb->wsize,
2426 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
2427 if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
2428 cifs_sb->rsize = min(cifs_sb->rsize,
2429 (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
1da177e4 2430
7586b765 2431 /* volume_info->password is freed above when existing session found
1da177e4
LT		 2432 (in which case it is not needed anymore) but when new sesion is created
2433 the password ptr is put in the new session structure (in which case the
2434 password will be freed at unmount time) */
70fe7dc0
JL		 2435out:
2436 /* zero out password before freeing */
7586b765
JL		 2437 if (volume_info) {
2438 if (volume_info->password != NULL) {
2439 memset(volume_info->password, 0,
2440 strlen(volume_info->password));
2441 kfree(volume_info->password);
2442 }
2443 kfree(volume_info->UNC);
2444 kfree(volume_info->prepath);
2445 kfree(volume_info);
70fe7dc0 2446 }
1da177e4
LT		 2447 FreeXid(xid);
2448 return rc;
2449}
2450
2451static int
2452CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
7c7b25bc 2453 char session_key[CIFS_SESS_KEY_SIZE],
1da177e4
LT		 2454 const struct nls_table *nls_codepage)
2455{
2456 struct smb_hdr *smb_buffer;
2457 struct smb_hdr *smb_buffer_response;
2458 SESSION_SETUP_ANDX *pSMB;
2459 SESSION_SETUP_ANDX *pSMBr;
2460 char *bcc_ptr;
2461 char *user;
2462 char *domain;
2463 int rc = 0;
2464 int remaining_words = 0;
2465 int bytes_returned = 0;
2466 int len;
2467 __u32 capabilities;
2468 __u16 count;
2469
eeac8047 2470 cFYI(1, ("In sesssetup"));
4523cc30 2471 if (ses == NULL)
1da177e4
LT		 2472 return -EINVAL;
2473 user = ses->userName;
2474 domain = ses->domainName;
2475 smb_buffer = cifs_buf_get();
582d21e5
SF		 2476
2477 if (smb_buffer == NULL)
1da177e4 2478 return -ENOMEM;
582d21e5 2479
1da177e4
LT		 2480 smb_buffer_response = smb_buffer;
2481 pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2482
2483 /* send SMBsessionSetup here */
2484 header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2485 NULL /* no tCon exists yet */ , 13 /* wct */ );
2486
1982c344 2487 smb_buffer->Mid = GetNextMid(ses->server);
1da177e4
LT		 2488 pSMB->req_no_secext.AndXCommand = 0xFF;
2489 pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2490 pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2491
50c2f753
SF		 2492 if (ses->server->secMode &
2493 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
1da177e4
LT		 2494 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2495
2496 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2497 CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
2498 if (ses->capabilities & CAP_UNICODE) {
2499 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2500 capabilities |= CAP_UNICODE;
2501 }
2502 if (ses->capabilities & CAP_STATUS32) {
2503 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2504 capabilities |= CAP_STATUS32;
2505 }
2506 if (ses->capabilities & CAP_DFS) {
2507 smb_buffer->Flags2 |= SMBFLG2_DFS;
2508 capabilities |= CAP_DFS;
2509 }
2510 pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);
2511
50c2f753 2512 pSMB->req_no_secext.CaseInsensitivePasswordLength =
7c7b25bc 2513 cpu_to_le16(CIFS_SESS_KEY_SIZE);
1da177e4
LT		 2514
2515 pSMB->req_no_secext.CaseSensitivePasswordLength =
7c7b25bc 2516 cpu_to_le16(CIFS_SESS_KEY_SIZE);
1da177e4 2517 bcc_ptr = pByteArea(smb_buffer);
7c7b25bc
SF		 2518 memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2519 bcc_ptr += CIFS_SESS_KEY_SIZE;
2520 memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
2521 bcc_ptr += CIFS_SESS_KEY_SIZE;
1da177e4
LT		 2522
2523 if (ses->capabilities & CAP_UNICODE) {
2524 if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
2525 *bcc_ptr = 0;
2526 bcc_ptr++;
2527 }
4523cc30 2528 if (user == NULL)
3979877e 2529 bytes_returned = 0; /* skip null user */
50c2f753 2530 else
1da177e4 2531 bytes_returned =
50c2f753 2532 cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
1da177e4
LT		 2533 nls_codepage);
2534 /* convert number of 16 bit words to bytes */
2535 bcc_ptr += 2 * bytes_returned;
2536 bcc_ptr += 2; /* trailing null */
2537 if (domain == NULL)
2538 bytes_returned =
e89dc920 2539 cifs_strtoUCS((__le16 *) bcc_ptr,
1da177e4
LT		 2540 "CIFS_LINUX_DOM", 32, nls_codepage);
2541 else
2542 bytes_returned =
e89dc920 2543 cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
1da177e4
LT		 2544 nls_codepage);
2545 bcc_ptr += 2 * bytes_returned;
2546 bcc_ptr += 2;
2547 bytes_returned =
e89dc920 2548 cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
1da177e4
LT		 2549 32, nls_codepage);
2550 bcc_ptr += 2 * bytes_returned;
2551 bytes_returned =
e9ff3990 2552 cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release,
1da177e4
LT		 2553 32, nls_codepage);
2554 bcc_ptr += 2 * bytes_returned;
2555 bcc_ptr += 2;
2556 bytes_returned =
e89dc920 2557 cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
1da177e4
LT		 2558 64, nls_codepage);
2559 bcc_ptr += 2 * bytes_returned;
2560 bcc_ptr += 2;
2561 } else {
50c2f753 2562 if (user != NULL) {
1da177e4
LT		 2563 strncpy(bcc_ptr, user, 200);
2564 bcc_ptr += strnlen(user, 200);
2565 }
2566 *bcc_ptr = 0;
2567 bcc_ptr++;
2568 if (domain == NULL) {
2569 strcpy(bcc_ptr, "CIFS_LINUX_DOM");
2570 bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
2571 } else {
2572 strncpy(bcc_ptr, domain, 64);
2573 bcc_ptr += strnlen(domain, 64);
2574 *bcc_ptr = 0;
2575 bcc_ptr++;
2576 }
2577 strcpy(bcc_ptr, "Linux version ");
2578 bcc_ptr += strlen("Linux version ");
e9ff3990
SH		 2579 strcpy(bcc_ptr, utsname()->release);
2580 bcc_ptr += strlen(utsname()->release) + 1;
1da177e4
LT		 2581 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2582 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2583 }
2584 count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2585 smb_buffer->smb_buf_length += count;
2586 pSMB->req_no_secext.ByteCount = cpu_to_le16(count);
2587
2588 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
133672ef 2589 &bytes_returned, CIFS_LONG_OP);
1da177e4
LT		 2590 if (rc) {
2591/* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
2592 } else if ((smb_buffer_response->WordCount == 3)
2593 || (smb_buffer_response->WordCount == 4)) {
2594 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2595 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2596 if (action & GUEST_LOGIN)
61e74801 2597 cFYI(1, ("Guest login")); /* BB mark SesInfo struct? */
50c2f753
SF		 2598 ses->Suid = smb_buffer_response->Uid; /* UID left in wire format
2599 (little endian) */
1da177e4 2600 cFYI(1, ("UID = %d ", ses->Suid));
50c2f753
SF		 2601 /* response can have either 3 or 4 word count - Samba sends 3 */
2602 bcc_ptr = pByteArea(smb_buffer_response);
1da177e4
LT		 2603 if ((pSMBr->resp.hdr.WordCount == 3)
2604 || ((pSMBr->resp.hdr.WordCount == 4)
2605 && (blob_len < pSMBr->resp.ByteCount))) {
2606 if (pSMBr->resp.hdr.WordCount == 4)
2607 bcc_ptr += blob_len;
2608
2609 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2610 if ((long) (bcc_ptr) % 2) {
2611 remaining_words =
50c2f753
SF		 2612 (BCC(smb_buffer_response) - 1) / 2;
2613 /* Unicode strings must be word
2614 aligned */
2615 bcc_ptr++;
1da177e4
LT		 2616 } else {
2617 remaining_words =
2618 BCC(smb_buffer_response) / 2;
2619 }
2620 len =
2621 UniStrnlen((wchar_t *) bcc_ptr,
2622 remaining_words - 1);
2623/* We look for obvious messed up bcc or strings in response so we do not go off
2624 the end since (at least) WIN2K and Windows XP have a major bug in not null
2625 terminating last Unicode string in response */
fb8c4b14 2626 if (ses->serverOS)
a424f8bf 2627 kfree(ses->serverOS);
50c2f753
SF		 2628 ses->serverOS = kzalloc(2 * (len + 1),
2629 GFP_KERNEL);
fb8c4b14 2630 if (ses->serverOS == NULL)
433dc24f 2631 goto sesssetup_nomem;
1da177e4 2632 cifs_strfromUCS_le(ses->serverOS,
50c2f753
SF		 2633 (__le16 *)bcc_ptr,
2634 len, nls_codepage);
1da177e4
LT		 2635 bcc_ptr += 2 * (len + 1);
2636 remaining_words -= len + 1;
2637 ses->serverOS[2 * len] = 0;
2638 ses->serverOS[1 + (2 * len)] = 0;
2639 if (remaining_words > 0) {
2640 len = UniStrnlen((wchar_t *)bcc_ptr,
2641 remaining_words-1);
cd49b492 2642 kfree(ses->serverNOS);
50c2f753
SF		 2643 ses->serverNOS = kzalloc(2 * (len + 1),
2644 GFP_KERNEL);
fb8c4b14 2645 if (ses->serverNOS == NULL)
433dc24f 2646 goto sesssetup_nomem;
1da177e4 2647 cifs_strfromUCS_le(ses->serverNOS,
50c2f753
SF		 2648 (__le16 *)bcc_ptr,
2649 len, nls_codepage);
1da177e4
LT		 2650 bcc_ptr += 2 * (len + 1);
2651 ses->serverNOS[2 * len] = 0;
2652 ses->serverNOS[1 + (2 * len)] = 0;
fb8c4b14 2653 if (strncmp(ses->serverNOS,
50c2f753 2654 "NT LAN Manager 4", 16) == 0) {
467a8f8d 2655 cFYI(1, ("NT4 server"));
1da177e4
LT		 2656 ses->flags |= CIFS_SES_NT4;
2657 }
2658 remaining_words -= len + 1;
2659 if (remaining_words > 0) {
433dc24f 2660 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
50c2f753
SF		 2661 /* last string is not always null terminated
2662 (for e.g. for Windows XP & 2000) */
fb8c4b14 2663 if (ses->serverDomain)
a424f8bf 2664 kfree(ses->serverDomain);
1da177e4 2665 ses->serverDomain =
50c2f753
SF		 2666 kzalloc(2*(len+1),
2667 GFP_KERNEL);
fb8c4b14 2668 if (ses->serverDomain == NULL)
433dc24f 2669 goto sesssetup_nomem;
1da177e4 2670 cifs_strfromUCS_le(ses->serverDomain,
50c2f753
SF		 2671 (__le16 *)bcc_ptr,
2672 len, nls_codepage);
1da177e4
LT		 2673 bcc_ptr += 2 * (len + 1);
2674 ses->serverDomain[2*len] = 0;
2675 ses->serverDomain[1+(2*len)] = 0;
50c2f753
SF		 2676 } else { /* else no more room so create
2677 dummy domain string */
fb8c4b14 2678 if (ses->serverDomain)
a424f8bf 2679 kfree(ses->serverDomain);
50c2f753 2680 ses->serverDomain =
e915fc49 2681 kzalloc(2, GFP_KERNEL);
a424f8bf 2682 }
50c2f753
SF		 2683 } else { /* no room so create dummy domain
2684 and NOS string */
2685
433dc24f
SF		 2686 /* if these kcallocs fail not much we
2687 can do, but better to not fail the
2688 sesssetup itself */
cd49b492 2689 kfree(ses->serverDomain);
1da177e4 2690 ses->serverDomain =
e915fc49 2691 kzalloc(2, GFP_KERNEL);
cd49b492 2692 kfree(ses->serverNOS);
1da177e4 2693 ses->serverNOS =
e915fc49 2694 kzalloc(2, GFP_KERNEL);
1da177e4
LT		 2695 }
2696 } else { /* ASCII */
2697 len = strnlen(bcc_ptr, 1024);
2698 if (((long) bcc_ptr + len) - (long)
2699 pByteArea(smb_buffer_response)
2700 <= BCC(smb_buffer_response)) {
cd49b492 2701 kfree(ses->serverOS);
50c2f753
SF		 2702 ses->serverOS = kzalloc(len + 1,
2703 GFP_KERNEL);
fb8c4b14 2704 if (ses->serverOS == NULL)
433dc24f 2705 goto sesssetup_nomem;
50c2f753 2706 strncpy(ses->serverOS, bcc_ptr, len);
1da177e4
LT		 2707
2708 bcc_ptr += len;
50c2f753
SF		 2709 /* null terminate the string */
2710 bcc_ptr[0] = 0;
1da177e4
LT		 2711 bcc_ptr++;
2712
2713 len = strnlen(bcc_ptr, 1024);
cd49b492 2714 kfree(ses->serverNOS);
50c2f753
SF		 2715 ses->serverNOS = kzalloc(len + 1,
2716 GFP_KERNEL);
fb8c4b14 2717 if (ses->serverNOS == NULL)
433dc24f 2718 goto sesssetup_nomem;
1da177e4
LT		 2719 strncpy(ses->serverNOS, bcc_ptr, len);
2720 bcc_ptr += len;
2721 bcc_ptr[0] = 0;
2722 bcc_ptr++;
2723
2724 len = strnlen(bcc_ptr, 1024);
fb8c4b14 2725 if (ses->serverDomain)
a424f8bf 2726 kfree(ses->serverDomain);
50c2f753
SF		 2727 ses->serverDomain = kzalloc(len + 1,
2728 GFP_KERNEL);
fb8c4b14 2729 if (ses->serverDomain == NULL)
433dc24f 2730 goto sesssetup_nomem;
50c2f753
SF		 2731 strncpy(ses->serverDomain, bcc_ptr,
2732 len);
1da177e4
LT		 2733 bcc_ptr += len;
2734 bcc_ptr[0] = 0;
2735 bcc_ptr++;
2736 } else
2737 cFYI(1,
50c2f753
SF		 2738 ("Variable field of length %d "
2739 "extends beyond end of smb ",
1da177e4
LT		 2740 len));
2741 }
2742 } else {
61e74801 2743 cERROR(1, ("Security Blob Length extends beyond "
50c2f753 2744 "end of SMB"));
1da177e4
LT		 2745 }
2746 } else {
61e74801 2747 cERROR(1, ("Invalid Word count %d: ",
1da177e4
LT		 2748 smb_buffer_response->WordCount));
2749 rc = -EIO;
2750 }
433dc24f
SF		 2751sesssetup_nomem: /* do not return an error on nomem for the info strings,
2752 since that could make reconnection harder, and
2753 reconnection might be needed to free memory */
a8a11d39 2754 cifs_buf_release(smb_buffer);
1da177e4
LT		 2755
2756 return rc;
2757}
2758
1da177e4
LT		 2759static int
2760CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
4b18f2a9 2761 struct cifsSesInfo *ses, bool *pNTLMv2_flag,
1da177e4
LT		 2762 const struct nls_table *nls_codepage)
2763{
2764 struct smb_hdr *smb_buffer;
2765 struct smb_hdr *smb_buffer_response;
2766 SESSION_SETUP_ANDX *pSMB;
2767 SESSION_SETUP_ANDX *pSMBr;
2768 char *bcc_ptr;
2769 char *domain;
2770 int rc = 0;
2771 int remaining_words = 0;
2772 int bytes_returned = 0;
2773 int len;
6345a3a8 2774 int SecurityBlobLength = sizeof(NEGOTIATE_MESSAGE);
1da177e4
LT		 2775 PNEGOTIATE_MESSAGE SecurityBlob;
2776 PCHALLENGE_MESSAGE SecurityBlob2;
2777 __u32 negotiate_flags, capabilities;
2778 __u16 count;
2779
12b3b8ff 2780 cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
fb8c4b14 2781 if (ses == NULL)
1da177e4
LT		 2782 return -EINVAL;
2783 domain = ses->domainName;
4b18f2a9 2784 *pNTLMv2_flag = false;
1da177e4
LT		 2785 smb_buffer = cifs_buf_get();
2786 if (smb_buffer == NULL) {
2787 return -ENOMEM;
2788 }
2789 smb_buffer_response = smb_buffer;
2790 pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
2791 pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;
2792
2793 /* send SMBsessionSetup here */
2794 header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
2795 NULL /* no tCon exists yet */ , 12 /* wct */ );
1982c344
SF		 2796
2797 smb_buffer->Mid = GetNextMid(ses->server);
1da177e4
LT		 2798 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
2799 pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
2800
2801 pSMB->req.AndXCommand = 0xFF;
2802 pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
2803 pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
2804
fb8c4b14 2805 if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
1da177e4
LT		 2806 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
2807
2808 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
2809 CAP_EXTENDED_SECURITY;
2810 if (ses->capabilities & CAP_UNICODE) {
2811 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
2812 capabilities |= CAP_UNICODE;
2813 }
2814 if (ses->capabilities & CAP_STATUS32) {
2815 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
2816 capabilities |= CAP_STATUS32;
2817 }
2818 if (ses->capabilities & CAP_DFS) {
2819 smb_buffer->Flags2 |= SMBFLG2_DFS;
2820 capabilities |= CAP_DFS;
2821 }
2822 pSMB->req.Capabilities = cpu_to_le32(capabilities);
2823
2824 bcc_ptr = (char *) &pSMB->req.SecurityBlob;
2825 SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
2826 strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
2827 SecurityBlob->MessageType = NtLmNegotiate;
2828 negotiate_flags =
2829 NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
12b3b8ff
SF		 2830 NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
2831 NTLMSSP_NEGOTIATE_56 |
1da177e4 2832 /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
fb8c4b14 2833 if (sign_CIFS_PDUs)
1da177e4 2834 negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
fb8c4b14 2835/* if (ntlmv2_support)
3979877e 2836 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;*/
1da177e4
LT		 2837 /* setup pointers to domain name and workstation name */
2838 bcc_ptr += SecurityBlobLength;
2839
2840 SecurityBlob->WorkstationName.Buffer = 0;
2841 SecurityBlob->WorkstationName.Length = 0;
2842 SecurityBlob->WorkstationName.MaximumLength = 0;
2843
12b3b8ff
SF		 2844 /* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
2845 along with username on auth request (ie the response to challenge) */
2846 SecurityBlob->DomainName.Buffer = 0;
2847 SecurityBlob->DomainName.Length = 0;
2848 SecurityBlob->DomainName.MaximumLength = 0;
1da177e4
LT		 2849 if (ses->capabilities & CAP_UNICODE) {
2850 if ((long) bcc_ptr % 2) {
2851 *bcc_ptr = 0;
2852 bcc_ptr++;
2853 }
2854
2855 bytes_returned =
e89dc920 2856 cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
1da177e4
LT		 2857 32, nls_codepage);
2858 bcc_ptr += 2 * bytes_returned;
2859 bytes_returned =
e9ff3990 2860 cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
1da177e4
LT		 2861 nls_codepage);
2862 bcc_ptr += 2 * bytes_returned;
2863 bcc_ptr += 2; /* null terminate Linux version */
2864 bytes_returned =
e89dc920 2865 cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
1da177e4
LT		 2866 64, nls_codepage);
2867 bcc_ptr += 2 * bytes_returned;
2868 *(bcc_ptr + 1) = 0;
2869 *(bcc_ptr + 2) = 0;
2870 bcc_ptr += 2; /* null terminate network opsys string */
2871 *(bcc_ptr + 1) = 0;
2872 *(bcc_ptr + 2) = 0;
2873 bcc_ptr += 2; /* null domain */
2874 } else { /* ASCII */
2875 strcpy(bcc_ptr, "Linux version ");
2876 bcc_ptr += strlen("Linux version ");
e9ff3990
SH		 2877 strcpy(bcc_ptr, utsname()->release);
2878 bcc_ptr += strlen(utsname()->release) + 1;
1da177e4
LT		 2879 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
2880 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
2881 bcc_ptr++; /* empty domain field */
2882 *bcc_ptr = 0;
2883 }
2884 SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
2885 pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
2886 count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
2887 smb_buffer->smb_buf_length += count;
2888 pSMB->req.ByteCount = cpu_to_le16(count);
2889
2890 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
133672ef 2891 &bytes_returned, CIFS_LONG_OP);
1da177e4
LT		 2892
2893 if (smb_buffer_response->Status.CifsError ==
2894 cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
2895 rc = 0;
2896
2897 if (rc) {
2898/* rc = map_smb_to_linux_error(smb_buffer_response); *//* done in SendReceive now */
2899 } else if ((smb_buffer_response->WordCount == 3)
2900 || (smb_buffer_response->WordCount == 4)) {
2901 __u16 action = le16_to_cpu(pSMBr->resp.Action);
2902 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
2903
2904 if (action & GUEST_LOGIN)
61e74801 2905 cFYI(1, ("Guest login"));
50c2f753 2906 /* Do we want to set anything in SesInfo struct when guest login? */
1da177e4 2907
50c2f753
SF		 2908 bcc_ptr = pByteArea(smb_buffer_response);
2909 /* response can have either 3 or 4 word count - Samba sends 3 */
1da177e4
LT		 2910
2911 SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
2912 if (SecurityBlob2->MessageType != NtLmChallenge) {
61e74801 2913 cFYI(1, ("Unexpected NTLMSSP message type received %d",
1da177e4
LT		 2914 SecurityBlob2->MessageType));
2915 } else if (ses) {
50c2f753 2916 ses->Suid = smb_buffer_response->Uid; /* UID left in le format */
12b3b8ff 2917 cFYI(1, ("UID = %d", ses->Suid));
1da177e4
LT		 2918 if ((pSMBr->resp.hdr.WordCount == 3)
2919 || ((pSMBr->resp.hdr.WordCount == 4)
2920 && (blob_len <
2921 pSMBr->resp.ByteCount))) {
2922
2923 if (pSMBr->resp.hdr.WordCount == 4) {
2924 bcc_ptr += blob_len;
12b3b8ff 2925 cFYI(1, ("Security Blob Length %d",
1da177e4
LT		 2926 blob_len));
2927 }
2928
12b3b8ff 2929 cFYI(1, ("NTLMSSP Challenge rcvd"));
1da177e4
LT		 2930
2931 memcpy(ses->server->cryptKey,
2932 SecurityBlob2->Challenge,
2933 CIFS_CRYPTO_KEY_SIZE);
50c2f753 2934 if (SecurityBlob2->NegotiateFlags &
12b3b8ff 2935 cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
4b18f2a9 2936 *pNTLMv2_flag = true;
1da177e4 2937
50c2f753
SF		 2938 if ((SecurityBlob2->NegotiateFlags &
2939 cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN))
1da177e4 2940 || (sign_CIFS_PDUs > 1))
50c2f753
SF		 2941 ses->server->secMode |=
2942 SECMODE_SIGN_REQUIRED;
2943 if ((SecurityBlob2->NegotiateFlags &
1da177e4 2944 cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
50c2f753 2945 ses->server->secMode |=
1da177e4
LT		 2946 SECMODE_SIGN_ENABLED;
2947
2948 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
2949 if ((long) (bcc_ptr) % 2) {
2950 remaining_words =
2951 (BCC(smb_buffer_response)
2952 - 1) / 2;
50c2f753
SF		 2953 /* Must word align unicode strings */
2954 bcc_ptr++;
1da177e4
LT		 2955 } else {
2956 remaining_words =
2957 BCC
2958 (smb_buffer_response) / 2;
2959 }
2960 len =
2961 UniStrnlen((wchar_t *) bcc_ptr,
2962 remaining_words - 1);
2963/* We look for obvious messed up bcc or strings in response so we do not go off
2964 the end since (at least) WIN2K and Windows XP have a major bug in not null
2965 terminating last Unicode string in response */
fb8c4b14 2966 if (ses->serverOS)
a424f8bf 2967 kfree(ses->serverOS);
1da177e4 2968 ses->serverOS =
e915fc49 2969 kzalloc(2 * (len + 1), GFP_KERNEL);
1da177e4 2970 cifs_strfromUCS_le(ses->serverOS,
e89dc920 2971 (__le16 *)
1da177e4
LT		 2972 bcc_ptr, len,
2973 nls_codepage);
2974 bcc_ptr += 2 * (len + 1);
2975 remaining_words -= len + 1;
2976 ses->serverOS[2 * len] = 0;
2977 ses->serverOS[1 + (2 * len)] = 0;
2978 if (remaining_words > 0) {
2979 len = UniStrnlen((wchar_t *)
2980 bcc_ptr,
2981 remaining_words
2982 - 1);
cd49b492 2983 kfree(ses->serverNOS);
1da177e4 2984 ses->serverNOS =
e915fc49 2985 kzalloc(2 * (len + 1),
1da177e4
LT		 2986 GFP_KERNEL);
2987 cifs_strfromUCS_le(ses->
2988 serverNOS,
e89dc920 2989 (__le16 *)
1da177e4
LT		 2990 bcc_ptr,
2991 len,
2992 nls_codepage);
2993 bcc_ptr += 2 * (len + 1);
2994 ses->serverNOS[2 * len] = 0;
2995 ses->serverNOS[1 +
2996 (2 * len)] = 0;
2997 remaining_words -= len + 1;
2998 if (remaining_words > 0) {
50c2f753
SF		 2999 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
3000 /* last string not always null terminated
3001 (for e.g. for Windows XP & 2000) */
cd49b492 3002 kfree(ses->serverDomain);
1da177e4 3003 ses->serverDomain =
e915fc49 3004 kzalloc(2 *
1da177e4
LT		 3005 (len +
3006 1),
3007 GFP_KERNEL);
3008 cifs_strfromUCS_le
e89dc920
SF		 3009 (ses->serverDomain,
3010 (__le16 *)bcc_ptr,
3011 len, nls_codepage);
1da177e4
LT		 3012 bcc_ptr +=
3013 2 * (len + 1);
e89dc920 3014 ses->serverDomain[2*len]
1da177e4 3015 = 0;
e89dc920
SF		 3016 ses->serverDomain
3017 [1 + (2 * len)]
1da177e4
LT		 3018 = 0;
3019 } /* else no more room so create dummy domain string */
a424f8bf 3020 else {
cd49b492 3021 kfree(ses->serverDomain);
1da177e4 3022 ses->serverDomain =
e915fc49 3023 kzalloc(2,
1da177e4 3024 GFP_KERNEL);
a424f8bf 3025 }
1da177e4 3026 } else { /* no room so create dummy domain and NOS string */
cd49b492 3027 kfree(ses->serverDomain);
1da177e4 3028 ses->serverDomain =
e915fc49 3029 kzalloc(2, GFP_KERNEL);
cd49b492 3030 kfree(ses->serverNOS);
1da177e4 3031 ses->serverNOS =
e915fc49 3032 kzalloc(2, GFP_KERNEL);
1da177e4
LT		 3033 }
3034 } else { /* ASCII */
3035 len = strnlen(bcc_ptr, 1024);
3036 if (((long) bcc_ptr + len) - (long)
3037 pByteArea(smb_buffer_response)
3038 <= BCC(smb_buffer_response)) {
fb8c4b14 3039 if (ses->serverOS)
a424f8bf 3040 kfree(ses->serverOS);
1da177e4 3041 ses->serverOS =
e915fc49 3042 kzalloc(len + 1,
1da177e4
LT		 3043 GFP_KERNEL);
3044 strncpy(ses->serverOS,
3045 bcc_ptr, len);
3046
3047 bcc_ptr += len;
3048 bcc_ptr[0] = 0; /* null terminate string */
3049 bcc_ptr++;
3050
3051 len = strnlen(bcc_ptr, 1024);
cd49b492 3052 kfree(ses->serverNOS);
1da177e4 3053 ses->serverNOS =
e915fc49 3054 kzalloc(len + 1,
1da177e4
LT		 3055 GFP_KERNEL);
3056 strncpy(ses->serverNOS, bcc_ptr, len);
3057 bcc_ptr += len;
3058 bcc_ptr[0] = 0;
3059 bcc_ptr++;
3060
3061 len = strnlen(bcc_ptr, 1024);
cd49b492 3062 kfree(ses->serverDomain);
1da177e4 3063 ses->serverDomain =
e915fc49 3064 kzalloc(len + 1,
1da177e4 3065 GFP_KERNEL);
50c2f753
SF		 3066 strncpy(ses->serverDomain,
3067 bcc_ptr, len);
1da177e4
LT		 3068 bcc_ptr += len;
3069 bcc_ptr[0] = 0;
3070 bcc_ptr++;
3071 } else
3072 cFYI(1,
63135e08
SF		 3073 ("field of length %d "
3074 "extends beyond end of smb",
1da177e4
LT		 3075 len));
3076 }
3077 } else {
50c2f753
SF		 3078 cERROR(1, ("Security Blob Length extends beyond"
3079 " end of SMB"));
1da177e4
LT		 3080 }
3081 } else {
3082 cERROR(1, ("No session structure passed in."));
3083 }
3084 } else {
61e74801 3085 cERROR(1, ("Invalid Word count %d:",
1da177e4
LT		 3086 smb_buffer_response->WordCount));
3087 rc = -EIO;
3088 }
3089
a8a11d39 3090 cifs_buf_release(smb_buffer);
1da177e4
LT		 3091
3092 return rc;
3093}
3094static int
3095CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
4b18f2a9 3096 char *ntlm_session_key, bool ntlmv2_flag,
6345a3a8 3097 const struct nls_table *nls_codepage)
1da177e4
LT		 3098{
3099 struct smb_hdr *smb_buffer;
3100 struct smb_hdr *smb_buffer_response;
3101 SESSION_SETUP_ANDX *pSMB;
3102 SESSION_SETUP_ANDX *pSMBr;
3103 char *bcc_ptr;
3104 char *user;
3105 char *domain;
3106 int rc = 0;
3107 int remaining_words = 0;
3108 int bytes_returned = 0;
3109 int len;
6345a3a8 3110 int SecurityBlobLength = sizeof(AUTHENTICATE_MESSAGE);
1da177e4
LT		 3111 PAUTHENTICATE_MESSAGE SecurityBlob;
3112 __u32 negotiate_flags, capabilities;
3113 __u16 count;
3114
3115 cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
fb8c4b14 3116 if (ses == NULL)
1da177e4
LT		 3117 return -EINVAL;
3118 user = ses->userName;
3119 domain = ses->domainName;
3120 smb_buffer = cifs_buf_get();
3121 if (smb_buffer == NULL) {
3122 return -ENOMEM;
3123 }
3124 smb_buffer_response = smb_buffer;
6345a3a8
CG		 3125 pSMB = (SESSION_SETUP_ANDX *)smb_buffer;
3126 pSMBr = (SESSION_SETUP_ANDX *)smb_buffer_response;
1da177e4
LT		 3127
3128 /* send SMBsessionSetup here */
3129 header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
3130 NULL /* no tCon exists yet */ , 12 /* wct */ );
1982c344
SF		 3131
3132 smb_buffer->Mid = GetNextMid(ses->server);
1da177e4
LT		 3133 pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
3134 pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
3135 pSMB->req.AndXCommand = 0xFF;
3136 pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
3137 pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);
3138
3139 pSMB->req.hdr.Uid = ses->Suid;
3140
fb8c4b14 3141 if (ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
1da177e4
LT		 3142 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3143
3144 capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
6345a3a8 3145 CAP_EXTENDED_SECURITY;
1da177e4
LT		 3146 if (ses->capabilities & CAP_UNICODE) {
3147 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3148 capabilities |= CAP_UNICODE;
3149 }
3150 if (ses->capabilities & CAP_STATUS32) {
3151 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3152 capabilities |= CAP_STATUS32;
3153 }
3154 if (ses->capabilities & CAP_DFS) {
3155 smb_buffer->Flags2 |= SMBFLG2_DFS;
3156 capabilities |= CAP_DFS;
3157 }
3158 pSMB->req.Capabilities = cpu_to_le32(capabilities);
3159
6345a3a8
CG		 3160 bcc_ptr = (char *)&pSMB->req.SecurityBlob;
3161 SecurityBlob = (PAUTHENTICATE_MESSAGE)bcc_ptr;
1da177e4
LT		 3162 strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
3163 SecurityBlob->MessageType = NtLmAuthenticate;
3164 bcc_ptr += SecurityBlobLength;
6345a3a8
CG		 3165 negotiate_flags = NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
3166 NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
3167 0x80000000 | NTLMSSP_NEGOTIATE_128;
fb8c4b14 3168 if (sign_CIFS_PDUs)
1da177e4 3169 negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
fb8c4b14 3170 if (ntlmv2_flag)
1da177e4
LT		 3171 negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
3172
3173/* setup pointers to domain name and workstation name */
3174
3175 SecurityBlob->WorkstationName.Buffer = 0;
3176 SecurityBlob->WorkstationName.Length = 0;
3177 SecurityBlob->WorkstationName.MaximumLength = 0;
3178 SecurityBlob->SessionKey.Length = 0;
3179 SecurityBlob->SessionKey.MaximumLength = 0;
3180 SecurityBlob->SessionKey.Buffer = 0;
3181
3182 SecurityBlob->LmChallengeResponse.Length = 0;
3183 SecurityBlob->LmChallengeResponse.MaximumLength = 0;
3184 SecurityBlob->LmChallengeResponse.Buffer = 0;
3185
3186 SecurityBlob->NtChallengeResponse.Length =
7c7b25bc 3187 cpu_to_le16(CIFS_SESS_KEY_SIZE);
1da177e4 3188 SecurityBlob->NtChallengeResponse.MaximumLength =
7c7b25bc
SF		 3189 cpu_to_le16(CIFS_SESS_KEY_SIZE);
3190 memcpy(bcc_ptr, ntlm_session_key, CIFS_SESS_KEY_SIZE);
1da177e4
LT		 3191 SecurityBlob->NtChallengeResponse.Buffer =
3192 cpu_to_le32(SecurityBlobLength);
7c7b25bc
SF		 3193 SecurityBlobLength += CIFS_SESS_KEY_SIZE;
3194 bcc_ptr += CIFS_SESS_KEY_SIZE;
1da177e4
LT		 3195
3196 if (ses->capabilities & CAP_UNICODE) {
3197 if (domain == NULL) {
3198 SecurityBlob->DomainName.Buffer = 0;
3199 SecurityBlob->DomainName.Length = 0;
3200 SecurityBlob->DomainName.MaximumLength = 0;
3201 } else {
77159b4d 3202 __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
1da177e4 3203 nls_codepage);
77159b4d 3204 ln *= 2;
1da177e4 3205 SecurityBlob->DomainName.MaximumLength =
77159b4d 3206 cpu_to_le16(ln);
1da177e4
LT		 3207 SecurityBlob->DomainName.Buffer =
3208 cpu_to_le32(SecurityBlobLength);
77159b4d
SF		 3209 bcc_ptr += ln;
3210 SecurityBlobLength += ln;
3211 SecurityBlob->DomainName.Length = cpu_to_le16(ln);
1da177e4
LT		 3212 }
3213 if (user == NULL) {
3214 SecurityBlob->UserName.Buffer = 0;
3215 SecurityBlob->UserName.Length = 0;
3216 SecurityBlob->UserName.MaximumLength = 0;
3217 } else {
77159b4d 3218 __u16 ln = cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
1da177e4 3219 nls_codepage);
77159b4d 3220 ln *= 2;
1da177e4 3221 SecurityBlob->UserName.MaximumLength =
77159b4d 3222 cpu_to_le16(ln);
1da177e4
LT		 3223 SecurityBlob->UserName.Buffer =
3224 cpu_to_le32(SecurityBlobLength);
77159b4d
SF		 3225 bcc_ptr += ln;
3226 SecurityBlobLength += ln;
3227 SecurityBlob->UserName.Length = cpu_to_le16(ln);
1da177e4
LT		 3228 }
3229
63135e08
SF		 3230 /* SecurityBlob->WorkstationName.Length =
3231 cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
1da177e4 3232 SecurityBlob->WorkstationName.Length *= 2;
63135e08
SF		 3233 SecurityBlob->WorkstationName.MaximumLength =
3234 cpu_to_le16(SecurityBlob->WorkstationName.Length);
3235 SecurityBlob->WorkstationName.Buffer =
3236 cpu_to_le32(SecurityBlobLength);
1da177e4
LT		 3237 bcc_ptr += SecurityBlob->WorkstationName.Length;
3238 SecurityBlobLength += SecurityBlob->WorkstationName.Length;
63135e08
SF		 3239 SecurityBlob->WorkstationName.Length =
3240 cpu_to_le16(SecurityBlob->WorkstationName.Length); */
1da177e4
LT		 3241
3242 if ((long) bcc_ptr % 2) {
3243 *bcc_ptr = 0;
3244 bcc_ptr++;
3245 }
3246 bytes_returned =
e89dc920 3247 cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
1da177e4
LT		 3248 32, nls_codepage);
3249 bcc_ptr += 2 * bytes_returned;
3250 bytes_returned =
e9ff3990 3251 cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
1da177e4
LT		 3252 nls_codepage);
3253 bcc_ptr += 2 * bytes_returned;
3254 bcc_ptr += 2; /* null term version string */
3255 bytes_returned =
e89dc920 3256 cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
1da177e4
LT		 3257 64, nls_codepage);
3258 bcc_ptr += 2 * bytes_returned;
3259 *(bcc_ptr + 1) = 0;
3260 *(bcc_ptr + 2) = 0;
3261 bcc_ptr += 2; /* null terminate network opsys string */
3262 *(bcc_ptr + 1) = 0;
3263 *(bcc_ptr + 2) = 0;
3264 bcc_ptr += 2; /* null domain */
3265 } else { /* ASCII */
3266 if (domain == NULL) {
3267 SecurityBlob->DomainName.Buffer = 0;
3268 SecurityBlob->DomainName.Length = 0;
3269 SecurityBlob->DomainName.MaximumLength = 0;
3270 } else {
77159b4d 3271 __u16 ln;
1da177e4
LT		 3272 negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
3273 strncpy(bcc_ptr, domain, 63);
77159b4d 3274 ln = strnlen(domain, 64);
1da177e4 3275 SecurityBlob->DomainName.MaximumLength =
77159b4d 3276 cpu_to_le16(ln);
1da177e4
LT		 3277 SecurityBlob->DomainName.Buffer =
3278 cpu_to_le32(SecurityBlobLength);
77159b4d
SF		 3279 bcc_ptr += ln;
3280 SecurityBlobLength += ln;
3281 SecurityBlob->DomainName.Length = cpu_to_le16(ln);
1da177e4
LT		 3282 }
3283 if (user == NULL) {
3284 SecurityBlob->UserName.Buffer = 0;
3285 SecurityBlob->UserName.Length = 0;
3286 SecurityBlob->UserName.MaximumLength = 0;
3287 } else {
77159b4d 3288 __u16 ln;
1da177e4 3289 strncpy(bcc_ptr, user, 63);
77159b4d
SF		 3290 ln = strnlen(user, 64);
3291 SecurityBlob->UserName.MaximumLength = cpu_to_le16(ln);
1da177e4 3292 SecurityBlob->UserName.Buffer =
77159b4d
SF		 3293 cpu_to_le32(SecurityBlobLength);
3294 bcc_ptr += ln;
3295 SecurityBlobLength += ln;
3296 SecurityBlob->UserName.Length = cpu_to_le16(ln);
1da177e4
LT		 3297 }
3298 /* BB fill in our workstation name if known BB */
3299
3300 strcpy(bcc_ptr, "Linux version ");
3301 bcc_ptr += strlen("Linux version ");
e9ff3990
SH		 3302 strcpy(bcc_ptr, utsname()->release);
3303 bcc_ptr += strlen(utsname()->release) + 1;
1da177e4
LT		 3304 strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
3305 bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
3306 bcc_ptr++; /* null domain */
3307 *bcc_ptr = 0;
3308 }
3309 SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
3310 pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
3311 count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
3312 smb_buffer->smb_buf_length += count;
3313 pSMB->req.ByteCount = cpu_to_le16(count);
3314
3315 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
133672ef 3316 &bytes_returned, CIFS_LONG_OP);
1da177e4 3317 if (rc) {
6345a3a8
CG		 3318/* rc = map_smb_to_linux_error(smb_buffer_response) done in SendReceive now */
3319 } else if ((smb_buffer_response->WordCount == 3) ||
3320 (smb_buffer_response->WordCount == 4)) {
1da177e4 3321 __u16 action = le16_to_cpu(pSMBr->resp.Action);
6345a3a8 3322 __u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
1da177e4 3323 if (action & GUEST_LOGIN)
61e74801 3324 cFYI(1, ("Guest login")); /* BB Should we set anything
50c2f753
SF		 3325 in SesInfo struct ? */
3326/* if (SecurityBlob2->MessageType != NtLm??) {
3327 cFYI("Unexpected message type on auth response is %d"));
3328 } */
3329
1da177e4
LT		 3330 if (ses) {
3331 cFYI(1,
50c2f753 3332 ("Check challenge UID %d vs auth response UID %d",
1da177e4 3333 ses->Suid, smb_buffer_response->Uid));
50c2f753
SF		 3334 /* UID left in wire format */
3335 ses->Suid = smb_buffer_response->Uid;
3336 bcc_ptr = pByteArea(smb_buffer_response);
3337 /* response can have either 3 or 4 word count - Samba sends 3 */
1da177e4
LT		 3338 if ((pSMBr->resp.hdr.WordCount == 3)
3339 || ((pSMBr->resp.hdr.WordCount == 4)
3340 && (blob_len <
3341 pSMBr->resp.ByteCount))) {
3342 if (pSMBr->resp.hdr.WordCount == 4) {
3343 bcc_ptr +=
3344 blob_len;
3345 cFYI(1,
3346 ("Security Blob Length %d ",
3347 blob_len));
3348 }
3349
3350 cFYI(1,
3351 ("NTLMSSP response to Authenticate "));
3352
3353 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3354 if ((long) (bcc_ptr) % 2) {
3355 remaining_words =
3356 (BCC(smb_buffer_response)
3357 - 1) / 2;
3358 bcc_ptr++; /* Unicode strings must be word aligned */
3359 } else {
3360 remaining_words = BCC(smb_buffer_response) / 2;
3361 }
77159b4d
SF		 3362 len = UniStrnlen((wchar_t *) bcc_ptr,
3363 remaining_words - 1);
1da177e4
LT		 3364/* We look for obvious messed up bcc or strings in response so we do not go off
3365 the end since (at least) WIN2K and Windows XP have a major bug in not null
3366 terminating last Unicode string in response */
fb8c4b14 3367 if (ses->serverOS)
08775834 3368 kfree(ses->serverOS);
1da177e4 3369 ses->serverOS =
e915fc49 3370 kzalloc(2 * (len + 1), GFP_KERNEL);
1da177e4 3371 cifs_strfromUCS_le(ses->serverOS,
e89dc920 3372 (__le16 *)
1da177e4
LT		 3373 bcc_ptr, len,
3374 nls_codepage);
3375 bcc_ptr += 2 * (len + 1);
3376 remaining_words -= len + 1;
3377 ses->serverOS[2 * len] = 0;
3378 ses->serverOS[1 + (2 * len)] = 0;
3379 if (remaining_words > 0) {
3380 len = UniStrnlen((wchar_t *)
3381 bcc_ptr,
3382 remaining_words
3383 - 1);
cd49b492 3384 kfree(ses->serverNOS);
1da177e4 3385 ses->serverNOS =
e915fc49 3386 kzalloc(2 * (len + 1),
1da177e4
LT		 3387 GFP_KERNEL);
3388 cifs_strfromUCS_le(ses->
3389 serverNOS,
e89dc920 3390 (__le16 *)
1da177e4
LT		 3391 bcc_ptr,
3392 len,
3393 nls_codepage);
3394 bcc_ptr += 2 * (len + 1);
3395 ses->serverNOS[2 * len] = 0;
3396 ses->serverNOS[1+(2*len)] = 0;
3397 remaining_words -= len + 1;
3398 if (remaining_words > 0) {
50c2f753 3399 len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
1da177e4 3400 /* last string not always null terminated (e.g. for Windows XP & 2000) */
fb8c4b14 3401 if (ses->serverDomain)
a424f8bf 3402 kfree(ses->serverDomain);
1da177e4 3403 ses->serverDomain =
e915fc49 3404 kzalloc(2 *
1da177e4
LT		 3405 (len +
3406 1),
3407 GFP_KERNEL);
3408 cifs_strfromUCS_le
3409 (ses->
3410 serverDomain,
e89dc920 3411 (__le16 *)
1da177e4
LT		 3412 bcc_ptr, len,
3413 nls_codepage);
3414 bcc_ptr +=
3415 2 * (len + 1);
3416 ses->
3417 serverDomain[2
3418 * len]
3419 = 0;
3420 ses->
3421 serverDomain[1
3422 +
3423 (2
3424 *
3425 len)]
3426 = 0;
3427 } /* else no more room so create dummy domain string */
a424f8bf 3428 else {
fb8c4b14 3429 if (ses->serverDomain)
a424f8bf 3430 kfree(ses->serverDomain);
e915fc49 3431 ses->serverDomain = kzalloc(2,GFP_KERNEL);
a424f8bf 3432 }
1da177e4 3433 } else { /* no room so create dummy domain and NOS string */
fb8c4b14 3434 if (ses->serverDomain)
a424f8bf 3435 kfree(ses->serverDomain);
e915fc49 3436 ses->serverDomain = kzalloc(2, GFP_KERNEL);
cd49b492 3437 kfree(ses->serverNOS);
e915fc49 3438 ses->serverNOS = kzalloc(2, GFP_KERNEL);
1da177e4
LT		 3439 }
3440 } else { /* ASCII */
3441 len = strnlen(bcc_ptr, 1024);
50c2f753
SF		 3442 if (((long) bcc_ptr + len) -
3443 (long) pByteArea(smb_buffer_response)
63135e08 3444 <= BCC(smb_buffer_response)) {
fb8c4b14 3445 if (ses->serverOS)
a424f8bf 3446 kfree(ses->serverOS);
77159b4d 3447 ses->serverOS = kzalloc(len + 1, GFP_KERNEL);
1da177e4
LT		 3448 strncpy(ses->serverOS,bcc_ptr, len);
3449
3450 bcc_ptr += len;
3451 bcc_ptr[0] = 0; /* null terminate the string */
3452 bcc_ptr++;
3453
3454 len = strnlen(bcc_ptr, 1024);
cd49b492 3455 kfree(ses->serverNOS);
50c2f753
SF		 3456 ses->serverNOS = kzalloc(len+1,
3457 GFP_KERNEL);
63135e08
SF		 3458 strncpy(ses->serverNOS,
3459 bcc_ptr, len);
1da177e4
LT		 3460 bcc_ptr += len;
3461 bcc_ptr[0] = 0;
3462 bcc_ptr++;
3463
3464 len = strnlen(bcc_ptr, 1024);
fb8c4b14 3465 if (ses->serverDomain)
a424f8bf 3466 kfree(ses->serverDomain);
63135e08
SF		 3467 ses->serverDomain =
3468 kzalloc(len+1,
3469 GFP_KERNEL);
3470 strncpy(ses->serverDomain,
3471 bcc_ptr, len);
1da177e4
LT		 3472 bcc_ptr += len;
3473 bcc_ptr[0] = 0;
3474 bcc_ptr++;
3475 } else
6345a3a8 3476 cFYI(1, ("field of length %d "
63135e08 3477 "extends beyond end of smb ",
1da177e4
LT		 3478 len));
3479 }
3480 } else {
6345a3a8 3481 cERROR(1, ("Security Blob extends beyond end "
63135e08 3482 "of SMB"));
1da177e4
LT		 3483 }
3484 } else {
3485 cERROR(1, ("No session structure passed in."));
3486 }
3487 } else {
6345a3a8 3488 cERROR(1, ("Invalid Word count %d: ",
1da177e4
LT		 3489 smb_buffer_response->WordCount));
3490 rc = -EIO;
3491 }
3492
a8a11d39 3493 cifs_buf_release(smb_buffer);
1da177e4
LT		 3494
3495 return rc;
3496}
3497
3498int
3499CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
3500 const char *tree, struct cifsTconInfo *tcon,
3501 const struct nls_table *nls_codepage)
3502{
3503 struct smb_hdr *smb_buffer;
3504 struct smb_hdr *smb_buffer_response;
3505 TCONX_REQ *pSMB;
3506 TCONX_RSP *pSMBr;
3507 unsigned char *bcc_ptr;
3508 int rc = 0;
3509 int length;
3510 __u16 count;
3511
3512 if (ses == NULL)
3513 return -EIO;
3514
3515 smb_buffer = cifs_buf_get();
3516 if (smb_buffer == NULL) {
3517 return -ENOMEM;
3518 }
3519 smb_buffer_response = smb_buffer;
3520
3521 header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
3522 NULL /*no tid */ , 4 /*wct */ );
1982c344
SF		 3523
3524 smb_buffer->Mid = GetNextMid(ses->server);
1da177e4
LT		 3525 smb_buffer->Uid = ses->Suid;
3526 pSMB = (TCONX_REQ *) smb_buffer;
3527 pSMBr = (TCONX_RSP *) smb_buffer_response;
3528
3529 pSMB->AndXCommand = 0xFF;
3530 pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
1da177e4 3531 bcc_ptr = &pSMB->Password[0];
fb8c4b14 3532 if ((ses->server->secMode) & SECMODE_USER) {
eeac8047 3533 pSMB->PasswordLength = cpu_to_le16(1); /* minimum */
7c7b25bc 3534 *bcc_ptr = 0; /* password is null byte */
eeac8047 3535 bcc_ptr++; /* skip password */
7c7b25bc 3536 /* already aligned so no need to do it below */
eeac8047 3537 } else {
7c7b25bc 3538 pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
eeac8047
SF		 3539 /* BB FIXME add code to fail this if NTLMv2 or Kerberos
3540 specified as required (when that support is added to
3541 the vfs in the future) as only NTLM or the much
7c7b25bc 3542 weaker LANMAN (which we do not send by default) is accepted
eeac8047
SF		 3543 by Samba (not sure whether other servers allow
3544 NTLMv2 password here) */
7c7b25bc 3545#ifdef CONFIG_CIFS_WEAK_PW_HASH
50c2f753 3546 if ((extended_security & CIFSSEC_MAY_LANMAN) &&
00e485b0
JL		 3547 (ses->server->secType == LANMAN))
3548 calc_lanman_hash(tcon->password, ses->server->cryptKey,
4e53a3fb
JL		 3549 ses->server->secMode &
3550 SECMODE_PW_ENCRYPT ? true : false,
3551 bcc_ptr);
7c7b25bc
SF		 3552 else
3553#endif /* CIFS_WEAK_PW_HASH */
00e485b0 3554 SMBNTencrypt(tcon->password, ses->server->cryptKey,
eeac8047
SF		 3555 bcc_ptr);
3556
7c7b25bc 3557 bcc_ptr += CIFS_SESS_KEY_SIZE;
fb8c4b14 3558 if (ses->capabilities & CAP_UNICODE) {
7c7b25bc
SF		 3559 /* must align unicode strings */
3560 *bcc_ptr = 0; /* null byte password */
3561 bcc_ptr++;
3562 }
eeac8047 3563 }
1da177e4 3564
50c2f753 3565 if (ses->server->secMode &
a878fb22 3566 (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
1da177e4
LT		 3567 smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
3568
3569 if (ses->capabilities & CAP_STATUS32) {
3570 smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
3571 }
3572 if (ses->capabilities & CAP_DFS) {
3573 smb_buffer->Flags2 |= SMBFLG2_DFS;
3574 }
3575 if (ses->capabilities & CAP_UNICODE) {
3576 smb_buffer->Flags2 |= SMBFLG2_UNICODE;
3577 length =
50c2f753
SF		 3578 cifs_strtoUCS((__le16 *) bcc_ptr, tree,
3579 6 /* max utf8 char length in bytes */ *
a878fb22
SF		 3580 (/* server len*/ + 256 /* share len */), nls_codepage);
3581 bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */
1da177e4
LT		 3582 bcc_ptr += 2; /* skip trailing null */
3583 } else { /* ASCII */
1da177e4
LT		 3584 strcpy(bcc_ptr, tree);
3585 bcc_ptr += strlen(tree) + 1;
3586 }
3587 strcpy(bcc_ptr, "?????");
3588 bcc_ptr += strlen("?????");
3589 bcc_ptr += 1;
3590 count = bcc_ptr - &pSMB->Password[0];
3591 pSMB->hdr.smb_buf_length += count;
3592 pSMB->ByteCount = cpu_to_le16(count);
3593
133672ef
SF		 3594 rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length,
3595 CIFS_STD_OP);
1da177e4
LT		 3596
3597 /* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
3598 /* above now done in SendReceive */
3599 if ((rc == 0) && (tcon != NULL)) {
3600 tcon->tidStatus = CifsGood;
3b795210 3601 tcon->need_reconnect = false;
1da177e4
LT		 3602 tcon->tid = smb_buffer_response->Tid;
3603 bcc_ptr = pByteArea(smb_buffer_response);
3604 length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
50c2f753 3605 /* skip service field (NB: this field is always ASCII) */
7f8ed420
SF		 3606 if (length == 3) {
3607 if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') &&
3608 (bcc_ptr[2] == 'C')) {
3609 cFYI(1, ("IPC connection"));
3610 tcon->ipc = 1;
3611 }
3612 } else if (length == 2) {
3613 if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) {
3614 /* the most common case */
3615 cFYI(1, ("disk share connection"));
3616 }
3617 }
50c2f753 3618 bcc_ptr += length + 1;
1da177e4
LT		 3619 strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
3620 if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
3621 length = UniStrnlen((wchar_t *) bcc_ptr, 512);
3622 if ((bcc_ptr + (2 * length)) -
3623 pByteArea(smb_buffer_response) <=
3624 BCC(smb_buffer_response)) {
f99d49ad 3625 kfree(tcon->nativeFileSystem);
1da177e4 3626 tcon->nativeFileSystem =
e915fc49 3627 kzalloc(length + 2, GFP_KERNEL);
88f370a6
SF		 3628 if (tcon->nativeFileSystem)
3629 cifs_strfromUCS_le(
3630 tcon->nativeFileSystem,
3631 (__le16 *) bcc_ptr,
3632 length, nls_codepage);
1da177e4
LT		 3633 bcc_ptr += 2 * length;
3634 bcc_ptr[0] = 0; /* null terminate the string */
3635 bcc_ptr[1] = 0;
3636 bcc_ptr += 2;
3637 }
50c2f753 3638 /* else do not bother copying these information fields*/
1da177e4
LT		 3639 } else {
3640 length = strnlen(bcc_ptr, 1024);
3641 if ((bcc_ptr + length) -
3642 pByteArea(smb_buffer_response) <=
3643 BCC(smb_buffer_response)) {
f99d49ad 3644 kfree(tcon->nativeFileSystem);
1da177e4 3645 tcon->nativeFileSystem =
e915fc49 3646 kzalloc(length + 1, GFP_KERNEL);
88f370a6
SF		 3647 if (tcon->nativeFileSystem)
3648 strncpy(tcon->nativeFileSystem, bcc_ptr,
3649 length);
1da177e4 3650 }
50c2f753 3651 /* else do not bother copying these information fields*/
1da177e4 3652 }
fb8c4b14 3653 if ((smb_buffer_response->WordCount == 3) ||
1a4e15a0
SF		 3654 (smb_buffer_response->WordCount == 7))
3655 /* field is in same location */
3979877e
SF		 3656 tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
3657 else
3658 tcon->Flags = 0;
1da177e4
LT		 3659 cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
3660 } else if ((rc == 0) && tcon == NULL) {
50c2f753 3661 /* all we need to save for IPC$ connection */
1da177e4
LT		 3662 ses->ipc_tid = smb_buffer_response->Tid;
3663 }
3664
a8a11d39 3665 cifs_buf_release(smb_buffer);
1da177e4
LT		 3666 return rc;
3667}
3668
3669int
3670cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
3671{
3672 int rc = 0;
50c2f753 3673 char *tmp;
1da177e4 3674
f1987b44
JL		 3675 if (cifs_sb->tcon)
3676 cifs_put_tcon(cifs_sb->tcon);
50c2f753 3677
1da177e4 3678 cifs_sb->tcon = NULL;
2fe87f02
SF		 3679 tmp = cifs_sb->prepath;
3680 cifs_sb->prepathlen = 0;
3681 cifs_sb->prepath = NULL;
3682 kfree(tmp);
1da177e4 3683
88e7d705 3684 return rc;
50c2f753 3685}
1da177e4
LT		 3686
3687int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
50c2f753 3688 struct nls_table *nls_info)
1da177e4
LT		 3689{
3690 int rc = 0;
7c7b25bc 3691 char ntlm_session_key[CIFS_SESS_KEY_SIZE];
4b18f2a9 3692 bool ntlmv2_flag = false;
ad009ac9 3693 int first_time = 0;
cb7691b6 3694 struct TCP_Server_Info *server = pSesInfo->server;
1da177e4
LT		 3695
3696 /* what if server changes its buffer size after dropping the session? */
cb7691b6 3697 if (server->maxBuf == 0) /* no need to send on reconnect */ {
1da177e4 3698 rc = CIFSSMBNegotiate(xid, pSesInfo);
cb7691b6
JL		 3699 if (rc == -EAGAIN) {
3700 /* retry only once on 1st time connection */
1da177e4 3701 rc = CIFSSMBNegotiate(xid, pSesInfo);
50c2f753 3702 if (rc == -EAGAIN)
1da177e4
LT		 3703 rc = -EHOSTDOWN;
3704 }
fb8c4b14 3705 if (rc == 0) {
1da177e4 3706 spin_lock(&GlobalMid_Lock);
cb7691b6
JL		 3707 if (server->tcpStatus != CifsExiting)
3708 server->tcpStatus = CifsGood;
1da177e4
LT		 3709 else
3710 rc = -EHOSTDOWN;
3711 spin_unlock(&GlobalMid_Lock);
3712
3713 }
ad009ac9 3714 first_time = 1;
1da177e4 3715 }
26b994fa
SF		 3716
3717 if (rc)
3718 goto ss_err_exit;
3719
3720 pSesInfo->flags = 0;
cb7691b6 3721 pSesInfo->capabilities = server->capabilities;
26b994fa
SF		 3722 if (linuxExtEnabled == 0)
3723 pSesInfo->capabilities &= (~CAP_UNIX);
ad009ac9 3724 /* pSesInfo->sequence_number = 0;*/
26b994fa 3725 cFYI(1, ("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
cb7691b6
JL		 3726 server->secMode, server->capabilities, server->timeAdj));
3727
26b994fa
SF		 3728 if (experimEnabled < 2)
3729 rc = CIFS_SessSetup(xid, pSesInfo, first_time, nls_info);
3730 else if (extended_security
3731 && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
cb7691b6 3732 && (server->secType == NTLMSSP)) {
26b994fa
SF		 3733 rc = -EOPNOTSUPP;
3734 } else if (extended_security
3735 && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
cb7691b6 3736 && (server->secType == RawNTLMSSP)) {
26b994fa
SF		 3737 cFYI(1, ("NTLMSSP sesssetup"));
3738 rc = CIFSNTLMSSPNegotiateSessSetup(xid, pSesInfo, &ntlmv2_flag,
3739 nls_info);
3740 if (!rc) {
3741 if (ntlmv2_flag) {
3742 char *v2_response;
3743 cFYI(1, ("more secure NTLM ver2 hash"));
3744 if (CalcNTLMv2_partial_mac_key(pSesInfo,
3745 nls_info)) {
3746 rc = -ENOMEM;
3747 goto ss_err_exit;
3748 } else
3749 v2_response = kmalloc(16 + 64 /* blob*/,
3750 GFP_KERNEL);
3751 if (v2_response) {
3752 CalcNTLMv2_response(pSesInfo,
3753 v2_response);
3754 /* if (first_time)
3755 cifs_calculate_ntlmv2_mac_key */
3756 kfree(v2_response);
1da177e4 3757 /* BB Put dummy sig in SessSetup PDU? */
1da177e4 3758 } else {
26b994fa
SF		 3759 rc = -ENOMEM;
3760 goto ss_err_exit;
1da177e4 3761 }
26b994fa
SF		 3762
3763 } else {
3764 SMBNTencrypt(pSesInfo->password,
cb7691b6 3765 server->cryptKey,
26b994fa
SF		 3766 ntlm_session_key);
3767
3768 if (first_time)
3769 cifs_calculate_mac_key(
cb7691b6 3770 &server->mac_signing_key,
26b994fa
SF		 3771 ntlm_session_key,
3772 pSesInfo->password);
3773 }
1da177e4
LT		 3774 /* for better security the weaker lanman hash not sent
3775 in AuthSessSetup so we no longer calculate it */
3776
26b994fa
SF		 3777 rc = CIFSNTLMSSPAuthSessSetup(xid, pSesInfo,
3778 ntlm_session_key,
3779 ntlmv2_flag,
3780 nls_info);
3781 }
3782 } else { /* old style NTLM 0.12 session setup */
cb7691b6 3783 SMBNTencrypt(pSesInfo->password, server->cryptKey,
26b994fa 3784 ntlm_session_key);
1da177e4 3785
26b994fa 3786 if (first_time)
cb7691b6
JL		 3787 cifs_calculate_mac_key(&server->mac_signing_key,
3788 ntlm_session_key,
3789 pSesInfo->password);
ad009ac9 3790
26b994fa
SF		 3791 rc = CIFSSessSetup(xid, pSesInfo, ntlm_session_key, nls_info);
3792 }
3793 if (rc) {
3794 cERROR(1, ("Send error in SessSetup = %d", rc));
3795 } else {
3796 cFYI(1, ("CIFS Session Established successfully"));
469ee614 3797 spin_lock(&GlobalMid_Lock);
1da177e4 3798 pSesInfo->status = CifsGood;
3b795210 3799 pSesInfo->need_reconnect = false;
469ee614 3800 spin_unlock(&GlobalMid_Lock);
1da177e4 3801 }
26b994fa 3802
1da177e4
LT		 3803ss_err_exit:
3804 return rc;
3805}
3806
Linux kernel - Deliverables
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