connect.c 103.0 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3
/*
 *   fs/cifs/connect.c
 *
4
 *   Copyright (C) International Business Machines  Corp., 2002,2006
L
Linus Torvalds 已提交
5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
 *   Author(s): Steve French (sfrench@us.ibm.com)
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published
 *   by the Free Software Foundation; either version 2.1 of the License, or
 *   (at your option) any later version.
 *
 *   This library is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 *   the GNU Lesser General Public License for more details.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 
 */
#include <linux/fs.h>
#include <linux/net.h>
#include <linux/string.h>
#include <linux/list.h>
#include <linux/wait.h>
#include <linux/ipv6.h>
#include <linux/pagemap.h>
#include <linux/ctype.h>
#include <linux/utsname.h>
#include <linux/mempool.h>
31
#include <linux/delay.h>
32
#include <linux/completion.h>
33
#include <linux/pagevec.h>
L
Linus Torvalds 已提交
34 35 36 37 38 39 40 41 42 43 44
#include <asm/uaccess.h>
#include <asm/processor.h>
#include "cifspdu.h"
#include "cifsglob.h"
#include "cifsproto.h"
#include "cifs_unicode.h"
#include "cifs_debug.h"
#include "cifs_fs_sb.h"
#include "ntlmssp.h"
#include "nterr.h"
#include "rfc1002pdu.h"
45
#include "cn_cifs.h"
L
Linus Torvalds 已提交
46 47 48 49

#define CIFS_PORT 445
#define RFC1001_PORT 139

50 51
static DECLARE_COMPLETION(cifsd_complete);

L
Linus Torvalds 已提交
52 53 54 55 56 57 58 59 60 61 62 63 64 65
extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8,
			 unsigned char *p24);

extern mempool_t *cifs_req_poolp;

struct smb_vol {
	char *username;
	char *password;
	char *domainname;
	char *UNC;
	char *UNCip;
	char *in6_addr;  /* ipv6 address as human readable form of in6_addr */
	char *iocharset;  /* local code page for mapping to and from Unicode */
	char source_rfc1001_name[16]; /* netbios name of client */
66
	char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
L
Linus Torvalds 已提交
67 68 69 70
	uid_t linux_uid;
	gid_t linux_gid;
	mode_t file_mode;
	mode_t dir_mode;
71
	unsigned secFlg;
L
Linus Torvalds 已提交
72 73 74 75 76 77
	unsigned rw:1;
	unsigned retry:1;
	unsigned intr:1;
	unsigned setuids:1;
	unsigned noperm:1;
	unsigned no_psx_acl:1; /* set if posix acl support should be disabled */
78
	unsigned cifs_acl:1;
L
Linus Torvalds 已提交
79 80 81
	unsigned no_xattr:1;   /* set if xattr (EA) support should be disabled*/
	unsigned server_ino:1; /* use inode numbers from server ie UniqueId */
	unsigned direct_io:1;
82
	unsigned remap:1;   /* set to remap seven reserved chars in filenames */
83
	unsigned posix_paths:1;   /* unset to not ask for posix pathnames. */
84
	unsigned sfu_emul:1;
85
	unsigned nullauth:1; /* attempt to authenticate with null user */
86 87
	unsigned nocase;     /* request case insensitive filenames */
	unsigned nobrl;      /* disable sending byte range locks to srv */
L
Linus Torvalds 已提交
88 89 90 91
	unsigned int rsize;
	unsigned int wsize;
	unsigned int sockopt;
	unsigned short int port;
92
	char * prepath;
L
Linus Torvalds 已提交
93 94 95 96
};

static int ipv4_connect(struct sockaddr_in *psin_server, 
			struct socket **csocket,
97 98
			char * netb_name,
			char * server_netb_name);
L
Linus Torvalds 已提交
99 100 101 102 103 104 105 106 107 108 109 110 111
static int ipv6_connect(struct sockaddr_in6 *psin_server, 
			struct socket **csocket);


	/* 
	 * cifs tcp session reconnection
	 * 
	 * mark tcp session as reconnecting so temporarily locked
	 * mark all smb sessions as reconnecting for tcp session
	 * reconnect tcp session
	 * wake up waiters on reconnection? - (not needed currently)
	 */

112
static int
L
Linus Torvalds 已提交
113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131
cifs_reconnect(struct TCP_Server_Info *server)
{
	int rc = 0;
	struct list_head *tmp;
	struct cifsSesInfo *ses;
	struct cifsTconInfo *tcon;
	struct mid_q_entry * mid_entry;
	
	spin_lock(&GlobalMid_Lock);
	if(server->tcpStatus == CifsExiting) {
		/* the demux thread will exit normally 
		next time through the loop */
		spin_unlock(&GlobalMid_Lock);
		return rc;
	} else
		server->tcpStatus = CifsNeedReconnect;
	spin_unlock(&GlobalMid_Lock);
	server->maxBuf = 0;

132
	cFYI(1, ("Reconnecting tcp session"));
L
Linus Torvalds 已提交
133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172

	/* before reconnecting the tcp session, mark the smb session (uid)
		and the tid bad so they are not used until reconnected */
	read_lock(&GlobalSMBSeslock);
	list_for_each(tmp, &GlobalSMBSessionList) {
		ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
		if (ses->server) {
			if (ses->server == server) {
				ses->status = CifsNeedReconnect;
				ses->ipc_tid = 0;
			}
		}
		/* else tcp and smb sessions need reconnection */
	}
	list_for_each(tmp, &GlobalTreeConnectionList) {
		tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
		if((tcon) && (tcon->ses) && (tcon->ses->server == server)) {
			tcon->tidStatus = CifsNeedReconnect;
		}
	}
	read_unlock(&GlobalSMBSeslock);
	/* do not want to be sending data on a socket we are freeing */
	down(&server->tcpSem); 
	if(server->ssocket) {
		cFYI(1,("State: 0x%x Flags: 0x%lx", server->ssocket->state,
			server->ssocket->flags));
		server->ssocket->ops->shutdown(server->ssocket,SEND_SHUTDOWN);
		cFYI(1,("Post shutdown state: 0x%x Flags: 0x%lx", server->ssocket->state,
			server->ssocket->flags));
		sock_release(server->ssocket);
		server->ssocket = NULL;
	}

	spin_lock(&GlobalMid_Lock);
	list_for_each(tmp, &server->pending_mid_q) {
		mid_entry = list_entry(tmp, struct
					mid_q_entry,
					qhead);
		if(mid_entry) {
			if(mid_entry->midState == MID_REQUEST_SUBMITTED) {
173 174 175 176
				/* Mark other intransit requests as needing
				   retry so we do not immediately mark the
				   session bad again (ie after we reconnect
				   below) as they timeout too */
L
Linus Torvalds 已提交
177 178 179 180 181 182 183 184 185
				mid_entry->midState = MID_RETRY_NEEDED;
			}
		}
	}
	spin_unlock(&GlobalMid_Lock);
	up(&server->tcpSem); 

	while ((server->tcpStatus != CifsExiting) && (server->tcpStatus != CifsGood))
	{
186
		try_to_freeze();
L
Linus Torvalds 已提交
187 188 189 190 191
		if(server->protocolType == IPV6) {
			rc = ipv6_connect(&server->addr.sockAddr6,&server->ssocket);
		} else {
			rc = ipv4_connect(&server->addr.sockAddr, 
					&server->ssocket,
192 193
					server->workstation_RFC1001_name,
					server->server_RFC1001_name);
L
Linus Torvalds 已提交
194 195
		}
		if(rc) {
196
			cFYI(1,("reconnect error %d",rc));
197
			msleep(3000);
L
Linus Torvalds 已提交
198 199 200 201 202
		} else {
			atomic_inc(&tcpSesReconnectCount);
			spin_lock(&GlobalMid_Lock);
			if(server->tcpStatus != CifsExiting)
				server->tcpStatus = CifsGood;
203 204
			server->sequence_number = 0;
			spin_unlock(&GlobalMid_Lock);			
L
Linus Torvalds 已提交
205 206 207 208 209 210 211
	/*		atomic_set(&server->inFlight,0);*/
			wake_up(&server->response_q);
		}
	}
	return rc;
}

212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311
/* 
	return codes:
		0 	not a transact2, or all data present
		>0 	transact2 with that much data missing
		-EINVAL = invalid transact2

 */
static int check2ndT2(struct smb_hdr * pSMB, unsigned int maxBufSize)
{
	struct smb_t2_rsp * pSMBt;
        int total_data_size;
	int data_in_this_rsp;
	int remaining;

	if(pSMB->Command != SMB_COM_TRANSACTION2)
		return 0;

        /* check for plausible wct, bcc and t2 data and parm sizes */
        /* check for parm and data offset going beyond end of smb */
	if(pSMB->WordCount != 10) { /* coalesce_t2 depends on this */
		cFYI(1,("invalid transact2 word count"));
		return -EINVAL;
	}

	pSMBt = (struct smb_t2_rsp *)pSMB;

	total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);
	data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount);

	remaining = total_data_size - data_in_this_rsp;

	if(remaining == 0)
		return 0;
	else if(remaining < 0) {
		cFYI(1,("total data %d smaller than data in frame %d",
			total_data_size, data_in_this_rsp));
		return -EINVAL;
	} else {
		cFYI(1,("missing %d bytes from transact2, check next response",
			remaining));
		if(total_data_size > maxBufSize) {
			cERROR(1,("TotalDataSize %d is over maximum buffer %d",
				total_data_size,maxBufSize));
			return -EINVAL; 
		}
		return remaining;
	}
}

static int coalesce_t2(struct smb_hdr * psecond, struct smb_hdr *pTargetSMB)
{
	struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond;
	struct smb_t2_rsp *pSMBt  = (struct smb_t2_rsp *)pTargetSMB;
	int total_data_size;
	int total_in_buf;
	int remaining;
	int total_in_buf2;
	char * data_area_of_target;
	char * data_area_of_buf2;
	__u16 byte_count;

	total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount);

	if(total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) {
		cFYI(1,("total data sizes of primary and secondary t2 differ"));
	}

	total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount);

	remaining = total_data_size - total_in_buf;
	
	if(remaining < 0)
		return -EINVAL;

	if(remaining == 0) /* nothing to do, ignore */
		return 0;
	
	total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount);
	if(remaining < total_in_buf2) {
		cFYI(1,("transact2 2nd response contains too much data"));
	}

	/* find end of first SMB data area */
	data_area_of_target = (char *)&pSMBt->hdr.Protocol + 
				le16_to_cpu(pSMBt->t2_rsp.DataOffset);
	/* validate target area */

	data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol +
                                        le16_to_cpu(pSMB2->t2_rsp.DataOffset);

	data_area_of_target += total_in_buf;

	/* copy second buffer into end of first buffer */
	memcpy(data_area_of_target,data_area_of_buf2,total_in_buf2);
	total_in_buf += total_in_buf2;
	pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf);
	byte_count = le16_to_cpu(BCC_LE(pTargetSMB));
	byte_count += total_in_buf2;
	BCC_LE(pTargetSMB) = cpu_to_le16(byte_count);

312
	byte_count = pTargetSMB->smb_buf_length;
313 314 315 316
	byte_count += total_in_buf2;

	/* BB also add check that we are not beyond maximum buffer size */
		
317
	pTargetSMB->smb_buf_length = byte_count;
318 319 320 321 322 323 324 325 326

	if(remaining == total_in_buf2) {
		cFYI(1,("found the last secondary response"));
		return 0; /* we are done */
	} else /* more responses to go */
		return 1;

}

L
Linus Torvalds 已提交
327 328 329 330 331 332
static int
cifs_demultiplex_thread(struct TCP_Server_Info *server)
{
	int length;
	unsigned int pdu_length, total_read;
	struct smb_hdr *smb_buffer = NULL;
333 334
	struct smb_hdr *bigbuf = NULL;
	struct smb_hdr *smallbuf = NULL;
L
Linus Torvalds 已提交
335 336 337 338 339 340 341
	struct msghdr smb_msg;
	struct kvec iov;
	struct socket *csocket = server->ssocket;
	struct list_head *tmp;
	struct cifsSesInfo *ses;
	struct task_struct *task_to_wake = NULL;
	struct mid_q_entry *mid_entry;
342
	char temp;
343
	int isLargeBuf = FALSE;
344 345
	int isMultiRsp;
	int reconnect;
L
Linus Torvalds 已提交
346 347 348 349 350 351 352 353 354 355

	daemonize("cifsd");
	allow_signal(SIGKILL);
	current->flags |= PF_MEMALLOC;
	server->tsk = current;	/* save process info to wake at shutdown */
	cFYI(1, ("Demultiplex PID: %d", current->pid));
	write_lock(&GlobalSMBSeslock); 
	atomic_inc(&tcpSesAllocCount);
	length = tcpSesAllocCount.counter;
	write_unlock(&GlobalSMBSeslock);
356
	complete(&cifsd_complete);
L
Linus Torvalds 已提交
357 358 359 360 361 362 363
	if(length  > 1) {
		mempool_resize(cifs_req_poolp,
			length + cifs_min_rcv,
			GFP_KERNEL);
	}

	while (server->tcpStatus != CifsExiting) {
364 365
		if (try_to_freeze())
			continue;
366 367
		if (bigbuf == NULL) {
			bigbuf = cifs_buf_get();
368 369
			if (!bigbuf) {
				cERROR(1, ("No memory for large SMB response"));
370 371 372 373
				msleep(3000);
				/* retry will check if exiting */
				continue;
			}
374 375
		} else if (isLargeBuf) {
			/* we are reusing a dirty large buf, clear its start */
376
			memset(bigbuf, 0, sizeof (struct smb_hdr));
L
Linus Torvalds 已提交
377
		}
378 379 380

		if (smallbuf == NULL) {
			smallbuf = cifs_small_buf_get();
381 382
			if (!smallbuf) {
				cERROR(1, ("No memory for SMB response"));
383 384 385 386 387 388 389 390 391
				msleep(1000);
				/* retry will check if exiting */
				continue;
			}
			/* beginning of smb buffer is cleared in our buf_get */
		} else /* if existing small buf clear beginning */
			memset(smallbuf, 0, sizeof (struct smb_hdr));

		isLargeBuf = FALSE;
392
		isMultiRsp = FALSE;
393
		smb_buffer = smallbuf;
L
Linus Torvalds 已提交
394 395 396 397 398 399 400 401
		iov.iov_base = smb_buffer;
		iov.iov_len = 4;
		smb_msg.msg_control = NULL;
		smb_msg.msg_controllen = 0;
		length =
		    kernel_recvmsg(csocket, &smb_msg,
				 &iov, 1, 4, 0 /* BB see socket.h flags */);

402
		if (server->tcpStatus == CifsExiting) {
L
Linus Torvalds 已提交
403 404
			break;
		} else if (server->tcpStatus == CifsNeedReconnect) {
405
			cFYI(1, ("Reconnect after server stopped responding"));
L
Linus Torvalds 已提交
406
			cifs_reconnect(server);
407
			cFYI(1, ("call to reconnect done"));
L
Linus Torvalds 已提交
408 409 410
			csocket = server->ssocket;
			continue;
		} else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
411
			msleep(1); /* minimum sleep to prevent looping
L
Linus Torvalds 已提交
412 413 414 415
				allowing socket to clear and app threads to set
				tcpStatus CifsNeedReconnect if server hung */
			continue;
		} else if (length <= 0) {
416 417
			if (server->tcpStatus == CifsNew) {
				cFYI(1, ("tcp session abend after SMBnegprot"));
418 419 420 421
				/* some servers kill the TCP session rather than
				   returning an SMB negprot error, in which
				   case reconnecting here is not going to help,
				   and so simply return error to mount */
L
Linus Torvalds 已提交
422 423
				break;
			}
424
			if (!try_to_freeze() && (length == -EINTR)) {
L
Linus Torvalds 已提交
425 426 427
				cFYI(1,("cifsd thread killed"));
				break;
			}
428 429
			cFYI(1,("Reconnect after unexpected peek error %d",
				length));
L
Linus Torvalds 已提交
430 431 432 433
			cifs_reconnect(server);
			csocket = server->ssocket;
			wake_up(&server->response_q);
			continue;
434 435
		} else if (length < 4) {
			cFYI(1,
436
			    ("Frame under four bytes received (%d bytes long)",
437 438 439 440 441 442
			      length));
			cifs_reconnect(server);
			csocket = server->ssocket;
			wake_up(&server->response_q);
			continue;
		}
L
Linus Torvalds 已提交
443

444 445
		/* The right amount was read from socket - 4 bytes */
		/* so we can now interpret the length field */
446

447 448 449 450
		/* the first byte big endian of the length field,
		is actually not part of the length but the type
		with the most common, zero, as regular data */
		temp = *((char *) smb_buffer);
451

452 453 454
		/* Note that FC 1001 length is big endian on the wire, 
		but we convert it here so it is always manipulated
		as host byte order */
455
		pdu_length = ntohl(smb_buffer->smb_buf_length);
456 457 458
		smb_buffer->smb_buf_length = pdu_length;

		cFYI(1,("rfc1002 length 0x%x)", pdu_length+4));
459

460
		if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
461
			continue; 
462
		} else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
463 464
			cFYI(1,("Good RFC 1002 session rsp"));
			continue;
465
		} else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
466 467
			/* we get this from Windows 98 instead of 
			   an error on SMB negprot response */
468
			cFYI(1,("Negative RFC1002 Session Response Error 0x%x)",
469
				pdu_length));
470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485
			if(server->tcpStatus == CifsNew) {
				/* if nack on negprot (rather than 
				ret of smb negprot error) reconnecting
				not going to help, ret error to mount */
				break;
			} else {
				/* give server a second to
				clean up before reconnect attempt */
				msleep(1000);
				/* always try 445 first on reconnect
				since we get NACK on some if we ever
				connected to port 139 (the NACK is 
				since we do not begin with RFC1001
				session initialize frame) */
				server->addr.sockAddr.sin_port = 
					htons(CIFS_PORT);
L
Linus Torvalds 已提交
486 487
				cifs_reconnect(server);
				csocket = server->ssocket;
488
				wake_up(&server->response_q);
L
Linus Torvalds 已提交
489
				continue;
490
			}
491
		} else if (temp != (char) 0) {
492
			cERROR(1,("Unknown RFC 1002 frame"));
493 494
			cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
				      length);
495 496 497
			cifs_reconnect(server);
			csocket = server->ssocket;
			continue;
498 499 500 501
		}

		/* else we have an SMB response */
		if((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
502
			    (pdu_length < sizeof (struct smb_hdr) - 1 - 4)) {
503
			cERROR(1, ("Invalid size SMB length %d pdu_length %d",
504
					length, pdu_length+4));
505 506 507 508 509 510 511 512 513
			cifs_reconnect(server);
			csocket = server->ssocket;
			wake_up(&server->response_q);
			continue;
		} 

		/* else length ok */
		reconnect = 0;

514
		if(pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531
			isLargeBuf = TRUE;
			memcpy(bigbuf, smallbuf, 4);
			smb_buffer = bigbuf;
		}
		length = 0;
		iov.iov_base = 4 + (char *)smb_buffer;
		iov.iov_len = pdu_length;
		for (total_read = 0; total_read < pdu_length; 
		     total_read += length) {
			length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
						pdu_length - total_read, 0);
			if((server->tcpStatus == CifsExiting) ||
			    (length == -EINTR)) {
				/* then will exit */
				reconnect = 2;
				break;
			} else if (server->tcpStatus == CifsNeedReconnect) {
532 533
				cifs_reconnect(server);
				csocket = server->ssocket;
534 535 536 537 538 539 540 541 542 543
			        /* Reconnect wakes up rspns q */
				/* Now we will reread sock */
				reconnect = 1;
				break;
			} else if ((length == -ERESTARTSYS) || 
				   (length == -EAGAIN)) {
				msleep(1); /* minimum sleep to prevent looping,
                                              allowing socket to clear and app 
					      threads to set tcpStatus
					      CifsNeedReconnect if server hung*/
544
				continue;
545 546 547 548 549 550 551
			} else if (length <= 0) {
				cERROR(1,("Received no data, expecting %d",
					      pdu_length - total_read));
				cifs_reconnect(server);
				csocket = server->ssocket;
				reconnect = 1;
				break;
552
			}
553 554 555 556 557
		}
		if(reconnect == 2)
			break;
		else if(reconnect == 1)
			continue;
L
Linus Torvalds 已提交
558

559 560
		length += 4; /* account for rfc1002 hdr */
	
561

562
		dump_smb(smb_buffer, length);
563
		if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
564
			cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
565 566
			continue;
		}
L
Linus Torvalds 已提交
567

568 569 570 571 572 573 574 575 576 577 578

		task_to_wake = NULL;
		spin_lock(&GlobalMid_Lock);
		list_for_each(tmp, &server->pending_mid_q) {
			mid_entry = list_entry(tmp, struct mid_q_entry, qhead);

			if ((mid_entry->mid == smb_buffer->Mid) && 
			    (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
			    (mid_entry->command == smb_buffer->Command)) {
				if(check2ndT2(smb_buffer,server->maxBuf) > 0) {
					/* We have a multipart transact2 resp */
579
					isMultiRsp = TRUE;
580 581 582 583
					if(mid_entry->resp_buf) {
						/* merge response - fix up 1st*/
						if(coalesce_t2(smb_buffer, 
							mid_entry->resp_buf)) {
584
							mid_entry->multiRsp = 1;
585 586 587
							break;
						} else {
							/* all parts received */
588
							mid_entry->multiEnd = 1;
589 590 591 592 593 594 595 596
							goto multi_t2_fnd; 
						}
					} else {
						if(!isLargeBuf) {
							cERROR(1,("1st trans2 resp needs bigbuf"));
					/* BB maybe we can fix this up,  switch
				   	   to already allocated large buffer? */
						} else {
597
							/* Have first buffer */
598 599 600 601 602 603 604 605 606
							mid_entry->resp_buf =
								 smb_buffer;
							mid_entry->largeBuf = 1;
							bigbuf = NULL;
						}
					}
					break;
				} 
				mid_entry->resp_buf = smb_buffer;
607
				if(isLargeBuf)
608
					mid_entry->largeBuf = 1;
609
				else
610 611 612 613
					mid_entry->largeBuf = 0;
multi_t2_fnd:
				task_to_wake = mid_entry->tsk;
				mid_entry->midState = MID_RESPONSE_RECEIVED;
S
Steve French 已提交
614 615 616
#ifdef CONFIG_CIFS_STATS2
				mid_entry->when_received = jiffies;
#endif
617 618 619 620
				/* so we do not time out requests to  server
				which is still responding (since server could
				be busy but not dead) */
				server->lstrp = jiffies;
621
				break;
622
			}
L
Linus Torvalds 已提交
623
		}
624 625
		spin_unlock(&GlobalMid_Lock);
		if (task_to_wake) {
626 627 628 629 630 631 632 633
			/* Was previous buf put in mpx struct for multi-rsp? */
			if(!isMultiRsp) {
				/* smb buffer will be freed by user thread */
				if(isLargeBuf) {
					bigbuf = NULL;
				} else
					smallbuf = NULL;
			}
634
			wake_up_process(task_to_wake);
635
		} else if ((is_valid_oplock_break(smb_buffer, server) == FALSE)
636
		    && (isMultiRsp == FALSE)) {                          
637
			cERROR(1, ("No task to wake, unknown frame rcvd! NumMids %d", midCount.counter));
638 639
			cifs_dump_mem("Received Data is: ",(char *)smb_buffer,
				      sizeof(struct smb_hdr));
640 641 642 643 644
#ifdef CONFIG_CIFS_DEBUG2
			cifs_dump_detail(smb_buffer);
			cifs_dump_mids(server);
#endif /* CIFS_DEBUG2 */
			
645 646 647
		}
	} /* end while !EXITING */

L
Linus Torvalds 已提交
648 649 650
	spin_lock(&GlobalMid_Lock);
	server->tcpStatus = CifsExiting;
	server->tsk = NULL;
651 652 653 654 655 656 657
	/* check if we have blocked requests that need to free */
	/* Note that cifs_max_pending is normally 50, but
	can be set at module install time to as little as two */
	if(atomic_read(&server->inFlight) >= cifs_max_pending)
		atomic_set(&server->inFlight, cifs_max_pending - 1);
	/* We do not want to set the max_pending too low or we
	could end up with the counter going negative */
L
Linus Torvalds 已提交
658 659 660
	spin_unlock(&GlobalMid_Lock);
	/* Although there should not be any requests blocked on 
	this queue it can not hurt to be paranoid and try to wake up requests
661
	that may haven been blocked when more than 50 at time were on the wire
L
Linus Torvalds 已提交
662 663 664 665
	to the same server - they now will see the session is in exit state
	and get out of SendReceive.  */
	wake_up_all(&server->request_q);
	/* give those requests time to exit */
666 667
	msleep(125);
	
L
Linus Torvalds 已提交
668 669 670 671
	if(server->ssocket) {
		sock_release(csocket);
		server->ssocket = NULL;
	}
672 673 674 675 676
	/* buffer usuallly freed in free_mid - need to free it here on exit */
	if (bigbuf != NULL)
		cifs_buf_release(bigbuf);
	if (smallbuf != NULL)
		cifs_small_buf_release(smallbuf);
L
Linus Torvalds 已提交
677 678 679

	read_lock(&GlobalSMBSeslock);
	if (list_empty(&server->pending_mid_q)) {
680 681
		/* loop through server session structures attached to this and
		    mark them dead */
L
Linus Torvalds 已提交
682 683 684 685 686 687 688 689 690 691 692
		list_for_each(tmp, &GlobalSMBSessionList) {
			ses =
			    list_entry(tmp, struct cifsSesInfo,
				       cifsSessionList);
			if (ses->server == server) {
				ses->status = CifsExiting;
				ses->server = NULL;
			}
		}
		read_unlock(&GlobalSMBSeslock);
	} else {
693 694 695 696 697 698 699 700 701 702 703
		/* although we can not zero the server struct pointer yet,
		since there are active requests which may depnd on them,
		mark the corresponding SMB sessions as exiting too */
		list_for_each(tmp, &GlobalSMBSessionList) {
			ses = list_entry(tmp, struct cifsSesInfo,
					 cifsSessionList);
			if (ses->server == server) {
				ses->status = CifsExiting;
			}
		}

L
Linus Torvalds 已提交
704 705 706 707 708
		spin_lock(&GlobalMid_Lock);
		list_for_each(tmp, &server->pending_mid_q) {
		mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
			if (mid_entry->midState == MID_REQUEST_SUBMITTED) {
				cFYI(1,
709
				  ("Clearing Mid 0x%x - waking up ",mid_entry->mid));
L
Linus Torvalds 已提交
710 711 712 713 714 715 716 717 718
				task_to_wake = mid_entry->tsk;
				if(task_to_wake) {
					wake_up_process(task_to_wake);
				}
			}
		}
		spin_unlock(&GlobalMid_Lock);
		read_unlock(&GlobalSMBSeslock);
		/* 1/8th of sec is more than enough time for them to exit */
719
		msleep(125);
L
Linus Torvalds 已提交
720 721
	}

722
	if (!list_empty(&server->pending_mid_q)) {
L
Linus Torvalds 已提交
723 724
		/* mpx threads have not exited yet give them 
		at least the smb send timeout time for long ops */
725 726 727 728
		/* due to delays on oplock break requests, we need
		to wait at least 45 seconds before giving up
		on a request getting a response and going ahead
		and killing cifsd */
L
Linus Torvalds 已提交
729
		cFYI(1, ("Wait for exit from demultiplex thread"));
730
		msleep(46000);
L
Linus Torvalds 已提交
731 732 733 734 735 736 737
		/* if threads still have not exited they are probably never
		coming home not much else we can do but free the memory */
	}

	write_lock(&GlobalSMBSeslock);
	atomic_dec(&tcpSesAllocCount);
	length = tcpSesAllocCount.counter;
738 739 740 741 742 743 744 745 746 747 748 749

	/* last chance to mark ses pointers invalid
	if there are any pointing to this (e.g
	if a crazy root user tried to kill cifsd 
	kernel thread explicitly this might happen) */
	list_for_each(tmp, &GlobalSMBSessionList) {
		ses = list_entry(tmp, struct cifsSesInfo,
				cifsSessionList);
		if (ses->server == server) {
			ses->server = NULL;
		}
	}
L
Linus Torvalds 已提交
750
	write_unlock(&GlobalSMBSeslock);
751 752

	kfree(server);
L
Linus Torvalds 已提交
753 754 755 756 757
	if(length  > 0) {
		mempool_resize(cifs_req_poolp,
			length + cifs_min_rcv,
			GFP_KERNEL);
	}
758
	
759
	complete_and_exit(&cifsd_complete, 0);
L
Linus Torvalds 已提交
760 761 762 763 764 765 766 767 768 769 770 771 772 773
	return 0;
}

static int
cifs_parse_mount_options(char *options, const char *devname,struct smb_vol *vol)
{
	char *value;
	char *data;
	unsigned int  temp_len, i, j;
	char separator[2];

	separator[0] = ',';
	separator[1] = 0; 

774 775 776 777 778 779 780 781 782 783 784
	if(Local_System_Name[0] != 0)
		memcpy(vol->source_rfc1001_name, Local_System_Name,15);
	else {
		memset(vol->source_rfc1001_name,0x20,15);
		for(i=0;i < strnlen(system_utsname.nodename,15);i++) {
			/* does not have to be perfect mapping since field is
			informational, only used for servers that do not support
			port 445 and it can be overridden at mount time */
			vol->source_rfc1001_name[i] = 
				toupper(system_utsname.nodename[i]);
		}
L
Linus Torvalds 已提交
785 786
	}
	vol->source_rfc1001_name[15] = 0;
787 788 789
	/* null target name indicates to use *SMBSERVR default called name
	   if we end up sending RFC1001 session initialize */
	vol->target_rfc1001_name[0] = 0;
L
Linus Torvalds 已提交
790 791 792 793 794 795 796 797
	vol->linux_uid = current->uid;	/* current->euid instead? */
	vol->linux_gid = current->gid;
	vol->dir_mode = S_IRWXUGO;
	/* 2767 perms indicate mandatory locking support */
	vol->file_mode = S_IALLUGO & ~(S_ISUID | S_IXGRP);

	/* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */
	vol->rw = TRUE;
798 799 800
	/* default is always to request posix paths. */
	vol->posix_paths = 1;

L
Linus Torvalds 已提交
801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862
	if (!options)
		return 1;

	if(strncmp(options,"sep=",4) == 0) {
		if(options[4] != 0) {
			separator[0] = options[4];
			options += 5;
		} else {
			cFYI(1,("Null separator not allowed"));
		}
	}
		
	while ((data = strsep(&options, separator)) != NULL) {
		if (!*data)
			continue;
		if ((value = strchr(data, '=')) != NULL)
			*value++ = '\0';

		if (strnicmp(data, "user_xattr",10) == 0) {/*parse before user*/
			vol->no_xattr = 0;
		} else if (strnicmp(data, "nouser_xattr",12) == 0) {
			vol->no_xattr = 1;
		} else if (strnicmp(data, "user", 4) == 0) {
			if (!value || !*value) {
				printk(KERN_WARNING
				       "CIFS: invalid or missing username\n");
				return 1;	/* needs_arg; */
			}
			if (strnlen(value, 200) < 200) {
				vol->username = value;
			} else {
				printk(KERN_WARNING "CIFS: username too long\n");
				return 1;
			}
		} else if (strnicmp(data, "pass", 4) == 0) {
			if (!value) {
				vol->password = NULL;
				continue;
			} else if(value[0] == 0) {
				/* check if string begins with double comma
				   since that would mean the password really
				   does start with a comma, and would not
				   indicate an empty string */
				if(value[1] != separator[0]) {
					vol->password = NULL;
					continue;
				}
			}
			temp_len = strlen(value);
			/* removed password length check, NTLM passwords
				can be arbitrarily long */

			/* if comma in password, the string will be 
			prematurely null terminated.  Commas in password are
			specified across the cifs mount interface by a double
			comma ie ,, and a comma used as in other cases ie ','
			as a parameter delimiter/separator is single and due
			to the strsep above is temporarily zeroed. */

			/* NB: password legally can have multiple commas and
			the only illegal character in a password is null */

863 864
			if ((value[temp_len] == 0) && 
			    (value[temp_len+1] == separator[0])) {
L
Linus Torvalds 已提交
865 866 867 868 869
				/* reinsert comma */
				value[temp_len] = separator[0];
				temp_len+=2;  /* move after the second comma */
				while(value[temp_len] != 0)  {
					if (value[temp_len] == separator[0]) {
870 871 872 873
						if (value[temp_len+1] == 
						     separator[0]) {
						/* skip second comma */
							temp_len++;
L
Linus Torvalds 已提交
874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891
						} else { 
						/* single comma indicating start
							 of next parm */
							break;
						}
					}
					temp_len++;
				}
				if(value[temp_len] == 0) {
					options = NULL;
				} else {
					value[temp_len] = 0;
					/* point option to start of next parm */
					options = value + temp_len + 1;
				}
				/* go from value to value + temp_len condensing 
				double commas to singles. Note that this ends up
				allocating a few bytes too many, which is ok */
892
				vol->password = kzalloc(temp_len, GFP_KERNEL);
893 894 895 896
				if(vol->password == NULL) {
					printk("CIFS: no memory for pass\n");
					return 1;
				}
L
Linus Torvalds 已提交
897 898
				for(i=0,j=0;i<temp_len;i++,j++) {
					vol->password[j] = value[i];
899 900
					if(value[i] == separator[0]
						&& value[i+1] == separator[0]) {
L
Linus Torvalds 已提交
901 902 903 904 905 906
						/* skip second comma */
						i++;
					}
				}
				vol->password[j] = 0;
			} else {
907
				vol->password = kzalloc(temp_len+1, GFP_KERNEL);
908 909 910 911
				if(vol->password == NULL) {
					printk("CIFS: no memory for pass\n");
					return 1;
				}
L
Linus Torvalds 已提交
912 913 914 915 916 917 918 919 920 921 922
				strcpy(vol->password, value);
			}
		} else if (strnicmp(data, "ip", 2) == 0) {
			if (!value || !*value) {
				vol->UNCip = NULL;
			} else if (strnlen(value, 35) < 35) {
				vol->UNCip = value;
			} else {
				printk(KERN_WARNING "CIFS: ip address too long\n");
				return 1;
			}
923 924 925 926 927
                } else if (strnicmp(data, "sec", 3) == 0) { 
                        if (!value || !*value) {
				cERROR(1,("no security value specified"));
                                continue;
                        } else if (strnicmp(value, "krb5i", 5) == 0) {
928
				vol->secFlg |= CIFSSEC_MAY_KRB5 | 
929
					CIFSSEC_MUST_SIGN;
930
			} else if (strnicmp(value, "krb5p", 5) == 0) {
931
				/* vol->secFlg |= CIFSSEC_MUST_SEAL | 
932
					CIFSSEC_MAY_KRB5; */ 
933 934 935
				cERROR(1,("Krb5 cifs privacy not supported"));
				return 1;
			} else if (strnicmp(value, "krb5", 4) == 0) {
936
				vol->secFlg |= CIFSSEC_MAY_KRB5;
937
			} else if (strnicmp(value, "ntlmv2i", 7) == 0) {
938
				vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
939
					CIFSSEC_MUST_SIGN;
940
			} else if (strnicmp(value, "ntlmv2", 6) == 0) {
941
				vol->secFlg |= CIFSSEC_MAY_NTLMV2;
942
			} else if (strnicmp(value, "ntlmi", 5) == 0) {
943
				vol->secFlg |= CIFSSEC_MAY_NTLM |
944
					CIFSSEC_MUST_SIGN;
945 946
			} else if (strnicmp(value, "ntlm", 4) == 0) {
				/* ntlm is default so can be turned off too */
947
				vol->secFlg |= CIFSSEC_MAY_NTLM;
948
			} else if (strnicmp(value, "nontlm", 6) == 0) {
949
				/* BB is there a better way to do this? */
950
				vol->secFlg |= CIFSSEC_MAY_NTLMV2;
951 952
#ifdef CONFIG_CIFS_WEAK_PW_HASH
			} else if (strnicmp(value, "lanman", 6) == 0) {
953
                                vol->secFlg |= CIFSSEC_MAY_LANMAN;
954
#endif
955
			} else if (strnicmp(value, "none", 4) == 0) {
956
				vol->nullauth = 1;
957 958 959 960
                        } else {
                                cERROR(1,("bad security option: %s", value));
                                return 1;
                        }
L
Linus Torvalds 已提交
961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993
		} else if ((strnicmp(data, "unc", 3) == 0)
			   || (strnicmp(data, "target", 6) == 0)
			   || (strnicmp(data, "path", 4) == 0)) {
			if (!value || !*value) {
				printk(KERN_WARNING
				       "CIFS: invalid path to network resource\n");
				return 1;	/* needs_arg; */
			}
			if ((temp_len = strnlen(value, 300)) < 300) {
				vol->UNC = kmalloc(temp_len+1,GFP_KERNEL);
				if(vol->UNC == NULL)
					return 1;
				strcpy(vol->UNC,value);
				if (strncmp(vol->UNC, "//", 2) == 0) {
					vol->UNC[0] = '\\';
					vol->UNC[1] = '\\';
				} else if (strncmp(vol->UNC, "\\\\", 2) != 0) {	                   
					printk(KERN_WARNING
					       "CIFS: UNC Path does not begin with // or \\\\ \n");
					return 1;
				}
			} else {
				printk(KERN_WARNING "CIFS: UNC name too long\n");
				return 1;
			}
		} else if ((strnicmp(data, "domain", 3) == 0)
			   || (strnicmp(data, "workgroup", 5) == 0)) {
			if (!value || !*value) {
				printk(KERN_WARNING "CIFS: invalid domain name\n");
				return 1;	/* needs_arg; */
			}
			/* BB are there cases in which a comma can be valid in
			a domain name and need special handling? */
994
			if (strnlen(value, 256) < 256) {
L
Linus Torvalds 已提交
995 996 997 998 999 1000
				vol->domainname = value;
				cFYI(1, ("Domain name set"));
			} else {
				printk(KERN_WARNING "CIFS: domain name too long\n");
				return 1;
			}
1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022
                } else if (strnicmp(data, "prefixpath", 10) == 0) {
                        if (!value || !*value) {
                                printk(KERN_WARNING
                                       "CIFS: invalid path prefix\n");
                                return 1;       /* needs_arg; */
                        }
                        if ((temp_len = strnlen(value, 1024)) < 1024) {
				if(value[0] != '/')
					temp_len++;  /* missing leading slash */
                                vol->prepath = kmalloc(temp_len+1,GFP_KERNEL);
                                if(vol->prepath == NULL)
                                        return 1;
				if(value[0] != '/') {
					vol->prepath[0] = '/';
	                                strcpy(vol->prepath+1,value);
				} else
					strcpy(vol->prepath,value);
				cFYI(1,("prefix path %s",vol->prepath));
                        } else {
                                printk(KERN_WARNING "CIFS: prefix too long\n");
                                return 1;
                        }
L
Linus Torvalds 已提交
1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100
		} else if (strnicmp(data, "iocharset", 9) == 0) {
			if (!value || !*value) {
				printk(KERN_WARNING "CIFS: invalid iocharset specified\n");
				return 1;	/* needs_arg; */
			}
			if (strnlen(value, 65) < 65) {
				if(strnicmp(value,"default",7))
					vol->iocharset = value;
				/* if iocharset not set load_nls_default used by caller */
				cFYI(1, ("iocharset set to %s",value));
			} else {
				printk(KERN_WARNING "CIFS: iocharset name too long.\n");
				return 1;
			}
		} else if (strnicmp(data, "uid", 3) == 0) {
			if (value && *value) {
				vol->linux_uid =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "gid", 3) == 0) {
			if (value && *value) {
				vol->linux_gid =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "file_mode", 4) == 0) {
			if (value && *value) {
				vol->file_mode =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "dir_mode", 4) == 0) {
			if (value && *value) {
				vol->dir_mode =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "dirmode", 4) == 0) {
			if (value && *value) {
				vol->dir_mode =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "port", 4) == 0) {
			if (value && *value) {
				vol->port =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "rsize", 5) == 0) {
			if (value && *value) {
				vol->rsize =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "wsize", 5) == 0) {
			if (value && *value) {
				vol->wsize =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "sockopt", 5) == 0) {
			if (value && *value) {
				vol->sockopt =
					simple_strtoul(value, &value, 0);
			}
		} else if (strnicmp(data, "netbiosname", 4) == 0) {
			if (!value || !*value || (*value == ' ')) {
				cFYI(1,("invalid (empty) netbiosname specified"));
			} else {
				memset(vol->source_rfc1001_name,0x20,15);
				for(i=0;i<15;i++) {
				/* BB are there cases in which a comma can be 
				valid in this workstation netbios name (and need
				special handling)? */

				/* We do not uppercase netbiosname for user */
					if (value[i]==0)
						break;
					else 
						vol->source_rfc1001_name[i] = value[i];
				}
				/* The string has 16th byte zero still from
				set at top of the function  */
				if((i==15) && (value[i] != 0))
1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125
					printk(KERN_WARNING "CIFS: netbiosname longer than 15 truncated.\n");
			}
		} else if (strnicmp(data, "servern", 7) == 0) {
			/* servernetbiosname specified override *SMBSERVER */
			if (!value || !*value || (*value == ' ')) {
				cFYI(1,("empty server netbiosname specified"));
			} else {
				/* last byte, type, is 0x20 for servr type */
				memset(vol->target_rfc1001_name,0x20,16);

				for(i=0;i<15;i++) {
				/* BB are there cases in which a comma can be
				   valid in this workstation netbios name (and need
				   special handling)? */

				/* user or mount helper must uppercase netbiosname */
					if (value[i]==0)
						break;
					else
						vol->target_rfc1001_name[i] = value[i];
				}
				/* The string has 16th byte zero still from
				   set at top of the function  */
				if((i==15) && (value[i] != 0))
					printk(KERN_WARNING "CIFS: server netbiosname longer than 15 truncated.\n");
L
Linus Torvalds 已提交
1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158
			}
		} else if (strnicmp(data, "credentials", 4) == 0) {
			/* ignore */
		} else if (strnicmp(data, "version", 3) == 0) {
			/* ignore */
		} else if (strnicmp(data, "guest",5) == 0) {
			/* ignore */
		} else if (strnicmp(data, "rw", 2) == 0) {
			vol->rw = TRUE;
		} else if ((strnicmp(data, "suid", 4) == 0) ||
				   (strnicmp(data, "nosuid", 6) == 0) ||
				   (strnicmp(data, "exec", 4) == 0) ||
				   (strnicmp(data, "noexec", 6) == 0) ||
				   (strnicmp(data, "nodev", 5) == 0) ||
				   (strnicmp(data, "noauto", 6) == 0) ||
				   (strnicmp(data, "dev", 3) == 0)) {
			/*  The mount tool or mount.cifs helper (if present)
				uses these opts to set flags, and the flags are read
				by the kernel vfs layer before we get here (ie
				before read super) so there is no point trying to
				parse these options again and set anything and it
				is ok to just ignore them */
			continue;
		} else if (strnicmp(data, "ro", 2) == 0) {
			vol->rw = FALSE;
		} else if (strnicmp(data, "hard", 4) == 0) {
			vol->retry = 1;
		} else if (strnicmp(data, "soft", 4) == 0) {
			vol->retry = 0;
		} else if (strnicmp(data, "perm", 4) == 0) {
			vol->noperm = 0;
		} else if (strnicmp(data, "noperm", 6) == 0) {
			vol->noperm = 1;
1159 1160 1161 1162
		} else if (strnicmp(data, "mapchars", 8) == 0) {
			vol->remap = 1;
		} else if (strnicmp(data, "nomapchars", 10) == 0) {
			vol->remap = 0;
1163 1164 1165 1166
                } else if (strnicmp(data, "sfu", 3) == 0) {
                        vol->sfu_emul = 1;
                } else if (strnicmp(data, "nosfu", 5) == 0) {
                        vol->sfu_emul = 0;
1167 1168 1169 1170
		} else if (strnicmp(data, "posixpaths", 10) == 0) {
			vol->posix_paths = 1;
		} else if (strnicmp(data, "noposixpaths", 12) == 0) {
			vol->posix_paths = 0;
1171 1172
                } else if ((strnicmp(data, "nocase", 6) == 0) ||
			   (strnicmp(data, "ignorecase", 10)  == 0)) {
1173 1174 1175
                        vol->nocase = 1;
		} else if (strnicmp(data, "brl", 3) == 0) {
			vol->nobrl =  0;
1176
		} else if ((strnicmp(data, "nobrl", 5) == 0) || 
1177
			   (strnicmp(data, "nolock", 6) == 0)) {
1178
			vol->nobrl =  1;
1179 1180 1181 1182 1183
			/* turn off mandatory locking in mode
			if remote locking is turned off since the
			local vfs will do advisory */
			if(vol->file_mode == (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
				vol->file_mode = S_IALLUGO;
L
Linus Torvalds 已提交
1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199
		} else if (strnicmp(data, "setuids", 7) == 0) {
			vol->setuids = 1;
		} else if (strnicmp(data, "nosetuids", 9) == 0) {
			vol->setuids = 0;
		} else if (strnicmp(data, "nohard", 6) == 0) {
			vol->retry = 0;
		} else if (strnicmp(data, "nosoft", 6) == 0) {
			vol->retry = 1;
		} else if (strnicmp(data, "nointr", 6) == 0) {
			vol->intr = 0;
		} else if (strnicmp(data, "intr", 4) == 0) {
			vol->intr = 1;
		} else if (strnicmp(data, "serverino",7) == 0) {
			vol->server_ino = 1;
		} else if (strnicmp(data, "noserverino",9) == 0) {
			vol->server_ino = 0;
1200 1201 1202 1203
		} else if (strnicmp(data, "cifsacl",7) == 0) {
			vol->cifs_acl = 1;
		} else if (strnicmp(data, "nocifsacl", 9) == 0) {
			vol->cifs_acl = 0;
L
Linus Torvalds 已提交
1204 1205 1206 1207
		} else if (strnicmp(data, "acl",3) == 0) {
			vol->no_psx_acl = 0;
		} else if (strnicmp(data, "noacl",5) == 0) {
			vol->no_psx_acl = 1;
1208 1209 1210 1211
		} else if (strnicmp(data, "sign",4) == 0) {
			vol->secFlg |= CIFSSEC_MUST_SIGN;
/*		} else if (strnicmp(data, "seal",4) == 0) {
			vol->secFlg |= CIFSSEC_MUST_SEAL; */
L
Linus Torvalds 已提交
1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300
		} else if (strnicmp(data, "direct",6) == 0) {
			vol->direct_io = 1;
		} else if (strnicmp(data, "forcedirectio",13) == 0) {
			vol->direct_io = 1;
		} else if (strnicmp(data, "in6_addr",8) == 0) {
			if (!value || !*value) {
				vol->in6_addr = NULL;
			} else if (strnlen(value, 49) == 48) {
				vol->in6_addr = value;
			} else {
				printk(KERN_WARNING "CIFS: ip v6 address not 48 characters long\n");
				return 1;
			}
		} else if (strnicmp(data, "noac", 4) == 0) {
			printk(KERN_WARNING "CIFS: Mount option noac not supported. Instead set /proc/fs/cifs/LookupCacheEnabled to 0\n");
		} else
			printk(KERN_WARNING "CIFS: Unknown mount option %s\n",data);
	}
	if (vol->UNC == NULL) {
		if(devname == NULL) {
			printk(KERN_WARNING "CIFS: Missing UNC name for mount target\n");
			return 1;
		}
		if ((temp_len = strnlen(devname, 300)) < 300) {
			vol->UNC = kmalloc(temp_len+1,GFP_KERNEL);
			if(vol->UNC == NULL)
				return 1;
			strcpy(vol->UNC,devname);
			if (strncmp(vol->UNC, "//", 2) == 0) {
				vol->UNC[0] = '\\';
				vol->UNC[1] = '\\';
			} else if (strncmp(vol->UNC, "\\\\", 2) != 0) {
				printk(KERN_WARNING "CIFS: UNC Path does not begin with // or \\\\ \n");
				return 1;
			}
		} else {
			printk(KERN_WARNING "CIFS: UNC name too long\n");
			return 1;
		}
	}
	if(vol->UNCip == NULL)
		vol->UNCip = &vol->UNC[2];

	return 0;
}

static struct cifsSesInfo *
cifs_find_tcp_session(struct in_addr * target_ip_addr, 
		struct in6_addr *target_ip6_addr,
		 char *userName, struct TCP_Server_Info **psrvTcp)
{
	struct list_head *tmp;
	struct cifsSesInfo *ses;
	*psrvTcp = NULL;
	read_lock(&GlobalSMBSeslock);

	list_for_each(tmp, &GlobalSMBSessionList) {
		ses = list_entry(tmp, struct cifsSesInfo, cifsSessionList);
		if (ses->server) {
			if((target_ip_addr && 
				(ses->server->addr.sockAddr.sin_addr.s_addr
				  == target_ip_addr->s_addr)) || (target_ip6_addr
				&& memcmp(&ses->server->addr.sockAddr6.sin6_addr,
					target_ip6_addr,sizeof(*target_ip6_addr)))){
				/* BB lock server and tcp session and increment use count here?? */
				*psrvTcp = ses->server;	/* found a match on the TCP session */
				/* BB check if reconnection needed */
				if (strncmp
				    (ses->userName, userName,
				     MAX_USERNAME_SIZE) == 0){
					read_unlock(&GlobalSMBSeslock);
					return ses;	/* found exact match on both tcp and SMB sessions */
				}
			}
		}
		/* else tcp and smb sessions need reconnection */
	}
	read_unlock(&GlobalSMBSeslock);
	return NULL;
}

static struct cifsTconInfo *
find_unc(__be32 new_target_ip_addr, char *uncName, char *userName)
{
	struct list_head *tmp;
	struct cifsTconInfo *tcon;

	read_lock(&GlobalSMBSeslock);
	list_for_each(tmp, &GlobalTreeConnectionList) {
1301
		cFYI(1, ("Next tcon"));
L
Linus Torvalds 已提交
1302 1303 1304 1305
		tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
		if (tcon->ses) {
			if (tcon->ses->server) {
				cFYI(1,
1306
				     ("old ip addr: %x == new ip %x ?",
L
Linus Torvalds 已提交
1307 1308 1309 1310
				      tcon->ses->server->addr.sockAddr.sin_addr.
				      s_addr, new_target_ip_addr));
				if (tcon->ses->server->addr.sockAddr.sin_addr.
				    s_addr == new_target_ip_addr) {
1311
	/* BB lock tcon, server and tcp session and increment use count here? */
L
Linus Torvalds 已提交
1312 1313
					/* found a match on the TCP session */
					/* BB check if reconnection needed */
1314
					cFYI(1,("IP match, old UNC: %s new: %s",
L
Linus Torvalds 已提交
1315 1316 1317 1318 1319
					      tcon->treeName, uncName));
					if (strncmp
					    (tcon->treeName, uncName,
					     MAX_TREE_SIZE) == 0) {
						cFYI(1,
1320
						     ("and old usr: %s new: %s",
L
Linus Torvalds 已提交
1321 1322 1323 1324 1325 1326
						      tcon->treeName, uncName));
						if (strncmp
						    (tcon->ses->userName,
						     userName,
						     MAX_USERNAME_SIZE) == 0) {
							read_unlock(&GlobalSMBSeslock);
1327 1328 1329
							/* matched smb session
							(user name */
							return tcon;
L
Linus Torvalds 已提交
1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341
						}
					}
				}
			}
		}
	}
	read_unlock(&GlobalSMBSeslock);
	return NULL;
}

int
connect_to_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1342 1343
		    const char *old_path, const struct nls_table *nls_codepage,
		    int remap)
L
Linus Torvalds 已提交
1344 1345 1346 1347 1348 1349
{
	unsigned char *referrals = NULL;
	unsigned int num_referrals;
	int rc = 0;

	rc = get_dfs_path(xid, pSesInfo,old_path, nls_codepage, 
1350
			&num_referrals, &referrals, remap);
L
Linus Torvalds 已提交
1351 1352 1353 1354 1355

	/* BB Add in code to: if valid refrl, if not ip address contact
		the helper that resolves tcp names, mount to it, try to 
		tcon to it unmount it if fail */

J
Jesper Juhl 已提交
1356
	kfree(referrals);
L
Linus Torvalds 已提交
1357 1358 1359 1360 1361 1362 1363

	return rc;
}

int
get_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
			const char *old_path, const struct nls_table *nls_codepage, 
1364 1365
			unsigned int *pnum_referrals, 
			unsigned char ** preferrals, int remap)
L
Linus Torvalds 已提交
1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389
{
	char *temp_unc;
	int rc = 0;

	*pnum_referrals = 0;

	if (pSesInfo->ipc_tid == 0) {
		temp_unc = kmalloc(2 /* for slashes */ +
			strnlen(pSesInfo->serverName,SERVER_NAME_LEN_WITH_NULL * 2)
				 + 1 + 4 /* slash IPC$ */  + 2,
				GFP_KERNEL);
		if (temp_unc == NULL)
			return -ENOMEM;
		temp_unc[0] = '\\';
		temp_unc[1] = '\\';
		strcpy(temp_unc + 2, pSesInfo->serverName);
		strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$");
		rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage);
		cFYI(1,
		     ("CIFS Tcon rc = %d ipc_tid = %d", rc,pSesInfo->ipc_tid));
		kfree(temp_unc);
	}
	if (rc == 0)
		rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals,
1390
				     pnum_referrals, nls_codepage, remap);
L
Linus Torvalds 已提交
1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411

	return rc;
}

/* See RFC1001 section 14 on representation of Netbios names */
static void rfc1002mangle(char * target,char * source, unsigned int length)
{
	unsigned int i,j;

	for(i=0,j=0;i<(length);i++) {
		/* mask a nibble at a time and encode */
		target[j] = 'A' + (0x0F & (source[i] >> 4));
		target[j+1] = 'A' + (0x0F & source[i]);
		j+=2;
	}

}


static int
ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket, 
1412
	     char * netbios_name, char * target_name)
L
Linus Torvalds 已提交
1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476
{
	int rc = 0;
	int connected = 0;
	__be16 orig_port = 0;

	if(*csocket == NULL) {
		rc = sock_create_kern(PF_INET, SOCK_STREAM, IPPROTO_TCP, csocket);
		if (rc < 0) {
			cERROR(1, ("Error %d creating socket",rc));
			*csocket = NULL;
			return rc;
		} else {
		/* BB other socket options to set KEEPALIVE, NODELAY? */
			cFYI(1,("Socket created"));
			(*csocket)->sk->sk_allocation = GFP_NOFS; 
		}
	}

	psin_server->sin_family = AF_INET;
	if(psin_server->sin_port) { /* user overrode default port */
		rc = (*csocket)->ops->connect(*csocket,
				(struct sockaddr *) psin_server,
				sizeof (struct sockaddr_in),0);
		if (rc >= 0)
			connected = 1;
	} 

	if(!connected) {
		/* save original port so we can retry user specified port  
			later if fall back ports fail this time  */
		orig_port = psin_server->sin_port;

		/* do not retry on the same port we just failed on */
		if(psin_server->sin_port != htons(CIFS_PORT)) {
			psin_server->sin_port = htons(CIFS_PORT);

			rc = (*csocket)->ops->connect(*csocket,
					(struct sockaddr *) psin_server,
					sizeof (struct sockaddr_in),0);
			if (rc >= 0)
				connected = 1;
		}
	}
	if (!connected) {
		psin_server->sin_port = htons(RFC1001_PORT);
		rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
					      psin_server, sizeof (struct sockaddr_in),0);
		if (rc >= 0) 
			connected = 1;
	}

	/* give up here - unless we want to retry on different
		protocol families some day */
	if (!connected) {
		if(orig_port)
			psin_server->sin_port = orig_port;
		cFYI(1,("Error %d connecting to server via ipv4",rc));
		sock_release(*csocket);
		*csocket = NULL;
		return rc;
	}
	/* Eventually check for other socket options to change from 
		the default. sock_setsockopt not used because it expects 
		user space buffer */
1477 1478
	 cFYI(1,("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",(*csocket)->sk->sk_sndbuf,
		 (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
L
Linus Torvalds 已提交
1479
	(*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1480 1481 1482 1483 1484
	/* make the bufsizes depend on wsize/rsize and max requests */
	if((*csocket)->sk->sk_sndbuf < (200 * 1024))
		(*csocket)->sk->sk_sndbuf = 200 * 1024;
	if((*csocket)->sk->sk_rcvbuf < (140 * 1024))
		(*csocket)->sk->sk_rcvbuf = 140 * 1024;
L
Linus Torvalds 已提交
1485 1486 1487 1488 1489 1490 1491 1492

	/* send RFC1001 sessinit */
	if(psin_server->sin_port == htons(RFC1001_PORT)) {
		/* some servers require RFC1001 sessinit before sending
		negprot - BB check reconnection in case where second 
		sessinit is sent but no second negprot */
		struct rfc1002_session_packet * ses_init_buf;
		struct smb_hdr * smb_buf;
1493
		ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), GFP_KERNEL);
L
Linus Torvalds 已提交
1494 1495
		if(ses_init_buf) {
			ses_init_buf->trailer.session_req.called_len = 32;
1496 1497 1498 1499 1500 1501 1502 1503
			if(target_name && (target_name[0] != 0)) {
				rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
					target_name, 16);
			} else {
				rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
					DEFAULT_CIFS_CALLED_NAME,16);
			}

L
Linus Torvalds 已提交
1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521
			ses_init_buf->trailer.session_req.calling_len = 32;
			/* calling name ends in null (byte 16) from old smb
			convention. */
			if(netbios_name && (netbios_name[0] !=0)) {
				rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
					netbios_name,16);
			} else {
				rfc1002mangle(ses_init_buf->trailer.session_req.calling_name,
					"LINUX_CIFS_CLNT",16);
			}
			ses_init_buf->trailer.session_req.scope1 = 0;
			ses_init_buf->trailer.session_req.scope2 = 0;
			smb_buf = (struct smb_hdr *)ses_init_buf;
			/* sizeof RFC1002_SESSION_REQUEST with no scope */
			smb_buf->smb_buf_length = 0x81000044;
			rc = smb_send(*csocket, smb_buf, 0x44,
				(struct sockaddr *)psin_server);
			kfree(ses_init_buf);
1522 1523 1524 1525 1526 1527 1528 1529
			msleep(1); /* RFC1001 layer in at least one server 
				      requires very short break before negprot
				      presumably because not expecting negprot
				      to follow so fast.  This is a simple
				      solution that works without 
				      complicating the code and causes no
				      significant slowing down on mount
				      for everyone else */
L
Linus Torvalds 已提交
1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632
		}
		/* else the negprot may still work without this 
		even though malloc failed */
		
	}
		
	return rc;
}

static int
ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
{
	int rc = 0;
	int connected = 0;
	__be16 orig_port = 0;

	if(*csocket == NULL) {
		rc = sock_create_kern(PF_INET6, SOCK_STREAM, IPPROTO_TCP, csocket);
		if (rc < 0) {
			cERROR(1, ("Error %d creating ipv6 socket",rc));
			*csocket = NULL;
			return rc;
		} else {
		/* BB other socket options to set KEEPALIVE, NODELAY? */
			 cFYI(1,("ipv6 Socket created"));
			(*csocket)->sk->sk_allocation = GFP_NOFS;
		}
	}

	psin_server->sin6_family = AF_INET6;

	if(psin_server->sin6_port) { /* user overrode default port */
		rc = (*csocket)->ops->connect(*csocket,
				(struct sockaddr *) psin_server,
				sizeof (struct sockaddr_in6),0);
		if (rc >= 0)
			connected = 1;
	} 

	if(!connected) {
		/* save original port so we can retry user specified port  
			later if fall back ports fail this time  */

		orig_port = psin_server->sin6_port;
		/* do not retry on the same port we just failed on */
		if(psin_server->sin6_port != htons(CIFS_PORT)) {
			psin_server->sin6_port = htons(CIFS_PORT);

			rc = (*csocket)->ops->connect(*csocket,
					(struct sockaddr *) psin_server,
					sizeof (struct sockaddr_in6),0);
			if (rc >= 0)
				connected = 1;
		}
	}
	if (!connected) {
		psin_server->sin6_port = htons(RFC1001_PORT);
		rc = (*csocket)->ops->connect(*csocket, (struct sockaddr *)
					 psin_server, sizeof (struct sockaddr_in6),0);
		if (rc >= 0) 
			connected = 1;
	}

	/* give up here - unless we want to retry on different
		protocol families some day */
	if (!connected) {
		if(orig_port)
			psin_server->sin6_port = orig_port;
		cFYI(1,("Error %d connecting to server via ipv6",rc));
		sock_release(*csocket);
		*csocket = NULL;
		return rc;
	}
	/* Eventually check for other socket options to change from 
		the default. sock_setsockopt not used because it expects 
		user space buffer */
	(*csocket)->sk->sk_rcvtimeo = 7 * HZ;
		
	return rc;
}

int
cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
	   char *mount_data, const char *devname)
{
	int rc = 0;
	int xid;
	int address_type = AF_INET;
	struct socket *csocket = NULL;
	struct sockaddr_in sin_server;
	struct sockaddr_in6 sin_server6;
	struct smb_vol volume_info;
	struct cifsSesInfo *pSesInfo = NULL;
	struct cifsSesInfo *existingCifsSes = NULL;
	struct cifsTconInfo *tcon = NULL;
	struct TCP_Server_Info *srvTcp = NULL;

	xid = GetXid();

/* cFYI(1, ("Entering cifs_mount. Xid: %d with: %s", xid, mount_data)); */
	
	memset(&volume_info,0,sizeof(struct smb_vol));
	if (cifs_parse_mount_options(mount_data, devname, &volume_info)) {
J
Jesper Juhl 已提交
1633 1634
		kfree(volume_info.UNC);
		kfree(volume_info.password);
1635
		kfree(volume_info.prepath);
L
Linus Torvalds 已提交
1636 1637 1638 1639 1640 1641 1642 1643 1644
		FreeXid(xid);
		return -EINVAL;
	}

	if (volume_info.username) {
		/* BB fixme parse for domain name here */
		cFYI(1, ("Username: %s ", volume_info.username));

	} else {
1645
		cifserror("No username specified");
L
Linus Torvalds 已提交
1646 1647
        /* In userspace mount helper we can get user name from alternate
           locations such as env variables and files on disk */
J
Jesper Juhl 已提交
1648 1649
		kfree(volume_info.UNC);
		kfree(volume_info.password);
1650
		kfree(volume_info.prepath);
L
Linus Torvalds 已提交
1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668
		FreeXid(xid);
		return -EINVAL;
	}

	if (volume_info.UNCip && volume_info.UNC) {
		rc = cifs_inet_pton(AF_INET, volume_info.UNCip,&sin_server.sin_addr.s_addr);

		if(rc <= 0) {
			/* not ipv4 address, try ipv6 */
			rc = cifs_inet_pton(AF_INET6,volume_info.UNCip,&sin_server6.sin6_addr.in6_u); 
			if(rc > 0)
				address_type = AF_INET6;
		} else {
			address_type = AF_INET;
		}
       
		if(rc <= 0) {
			/* we failed translating address */
J
Jesper Juhl 已提交
1669 1670
			kfree(volume_info.UNC);
			kfree(volume_info.password);
1671
			kfree(volume_info.prepath);
L
Linus Torvalds 已提交
1672 1673 1674 1675 1676 1677 1678 1679 1680 1681
			FreeXid(xid);
			return -EINVAL;
		}

		cFYI(1, ("UNC: %s ip: %s", volume_info.UNC, volume_info.UNCip));
		/* success */
		rc = 0;
	} else if (volume_info.UNCip){
		/* BB using ip addr as server name connect to the DFS root below */
		cERROR(1,("Connecting to DFS root not implemented yet"));
J
Jesper Juhl 已提交
1682 1683
		kfree(volume_info.UNC);
		kfree(volume_info.password);
1684
		kfree(volume_info.prepath);
L
Linus Torvalds 已提交
1685 1686 1687 1688
		FreeXid(xid);
		return -EINVAL;
	} else /* which servers DFS root would we conect to */ {
		cERROR(1,
1689
		       ("CIFS mount error: No UNC path (e.g. -o unc=//192.168.1.100/public) specified"));
J
Jesper Juhl 已提交
1690 1691
		kfree(volume_info.UNC);
		kfree(volume_info.password);
1692
		kfree(volume_info.prepath);
L
Linus Torvalds 已提交
1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704
		FreeXid(xid);
		return -EINVAL;
	}

	/* this is needed for ASCII cp to Unicode converts */
	if(volume_info.iocharset == NULL) {
		cifs_sb->local_nls = load_nls_default();
	/* load_nls_default can not return null */
	} else {
		cifs_sb->local_nls = load_nls(volume_info.iocharset);
		if(cifs_sb->local_nls == NULL) {
			cERROR(1,("CIFS mount error: iocharset %s not found",volume_info.iocharset));
J
Jesper Juhl 已提交
1705 1706
			kfree(volume_info.UNC);
			kfree(volume_info.password);
1707
			kfree(volume_info.prepath);
L
Linus Torvalds 已提交
1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721
			FreeXid(xid);
			return -ELIBACC;
		}
	}

	if(address_type == AF_INET)
		existingCifsSes = cifs_find_tcp_session(&sin_server.sin_addr,
			NULL /* no ipv6 addr */,
			volume_info.username, &srvTcp);
	else if(address_type == AF_INET6)
		existingCifsSes = cifs_find_tcp_session(NULL /* no ipv4 addr */,
			&sin_server6.sin6_addr,
			volume_info.username, &srvTcp);
	else {
J
Jesper Juhl 已提交
1722 1723
		kfree(volume_info.UNC);
		kfree(volume_info.password);
1724
		kfree(volume_info.prepath);
L
Linus Torvalds 已提交
1725 1726 1727 1728 1729 1730
		FreeXid(xid);
		return -EINVAL;
	}


	if (srvTcp) {
1731
		cFYI(1, ("Existing tcp session with server found"));                
L
Linus Torvalds 已提交
1732 1733 1734 1735 1736
	} else {	/* create socket */
		if(volume_info.port)
			sin_server.sin_port = htons(volume_info.port);
		else
			sin_server.sin_port = 0;
1737 1738 1739
		rc = ipv4_connect(&sin_server,&csocket,
				  volume_info.source_rfc1001_name,
				  volume_info.target_rfc1001_name);
L
Linus Torvalds 已提交
1740 1741 1742 1743 1744
		if (rc < 0) {
			cERROR(1,
			       ("Error connecting to IPv4 socket. Aborting operation"));
			if(csocket != NULL)
				sock_release(csocket);
J
Jesper Juhl 已提交
1745 1746
			kfree(volume_info.UNC);
			kfree(volume_info.password);
1747
			kfree(volume_info.prepath);
L
Linus Torvalds 已提交
1748 1749 1750 1751 1752 1753 1754 1755
			FreeXid(xid);
			return rc;
		}

		srvTcp = kmalloc(sizeof (struct TCP_Server_Info), GFP_KERNEL);
		if (srvTcp == NULL) {
			rc = -ENOMEM;
			sock_release(csocket);
J
Jesper Juhl 已提交
1756 1757
			kfree(volume_info.UNC);
			kfree(volume_info.password);
1758
			kfree(volume_info.prepath);
L
Linus Torvalds 已提交
1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780
			FreeXid(xid);
			return rc;
		} else {
			memset(srvTcp, 0, sizeof (struct TCP_Server_Info));
			memcpy(&srvTcp->addr.sockAddr, &sin_server, sizeof (struct sockaddr_in));
			atomic_set(&srvTcp->inFlight,0);
			/* BB Add code for ipv6 case too */
			srvTcp->ssocket = csocket;
			srvTcp->protocolType = IPV4;
			init_waitqueue_head(&srvTcp->response_q);
			init_waitqueue_head(&srvTcp->request_q);
			INIT_LIST_HEAD(&srvTcp->pending_mid_q);
			/* at this point we are the only ones with the pointer
			to the struct since the kernel thread not created yet
			so no need to spinlock this init of tcpStatus */
			srvTcp->tcpStatus = CifsNew;
			init_MUTEX(&srvTcp->tcpSem);
			rc = (int)kernel_thread((void *)(void *)cifs_demultiplex_thread, srvTcp,
				      CLONE_FS | CLONE_FILES | CLONE_VM);
			if(rc < 0) {
				rc = -ENOMEM;
				sock_release(csocket);
J
Jesper Juhl 已提交
1781 1782
				kfree(volume_info.UNC);
				kfree(volume_info.password);
1783
				kfree(volume_info.prepath);
L
Linus Torvalds 已提交
1784 1785
				FreeXid(xid);
				return rc;
1786 1787 1788
			}
			wait_for_completion(&cifsd_complete);
			rc = 0;
L
Linus Torvalds 已提交
1789
			memcpy(srvTcp->workstation_RFC1001_name, volume_info.source_rfc1001_name,16);
1790
			memcpy(srvTcp->server_RFC1001_name, volume_info.target_rfc1001_name,16);
1791
			srvTcp->sequence_number = 0;
L
Linus Torvalds 已提交
1792 1793 1794 1795 1796
		}
	}

	if (existingCifsSes) {
		pSesInfo = existingCifsSes;
1797
		cFYI(1, ("Existing smb sess found"));
J
Jesper Juhl 已提交
1798
		kfree(volume_info.password);
L
Linus Torvalds 已提交
1799 1800
		/* volume_info.UNC freed at end of function */
	} else if (!rc) {
1801
		cFYI(1, ("Existing smb sess not found"));
L
Linus Torvalds 已提交
1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817
		pSesInfo = sesInfoAlloc();
		if (pSesInfo == NULL)
			rc = -ENOMEM;
		else {
			pSesInfo->server = srvTcp;
			sprintf(pSesInfo->serverName, "%u.%u.%u.%u",
				NIPQUAD(sin_server.sin_addr.s_addr));
		}

		if (!rc){
			/* volume_info.password freed at unmount */   
			if (volume_info.password)
				pSesInfo->password = volume_info.password;
			if (volume_info.username)
				strncpy(pSesInfo->userName,
					volume_info.username,MAX_USERNAME_SIZE);
1818 1819 1820 1821 1822 1823 1824 1825
			if (volume_info.domainname) {
				int len = strlen(volume_info.domainname);
				pSesInfo->domainName = 
					kmalloc(len + 1, GFP_KERNEL);
				if(pSesInfo->domainName)
					strcpy(pSesInfo->domainName,
						volume_info.domainname);
			}
L
Linus Torvalds 已提交
1826
			pSesInfo->linux_uid = volume_info.linux_uid;
1827
			pSesInfo->overrideSecFlg = volume_info.secFlg;
L
Linus Torvalds 已提交
1828
			down(&pSesInfo->sesSem);
1829
			/* BB FIXME need to pass vol->secFlgs BB */
L
Linus Torvalds 已提交
1830 1831 1832 1833 1834
			rc = cifs_setup_session(xid,pSesInfo, cifs_sb->local_nls);
			up(&pSesInfo->sesSem);
			if(!rc)
				atomic_inc(&srvTcp->socketUseCount);
		} else
J
Jesper Juhl 已提交
1835
			kfree(volume_info.password);
L
Linus Torvalds 已提交
1836 1837 1838 1839
	}
    
	/* search for existing tcon to this server share */
	if (!rc) {
1840 1841 1842 1843 1844
		if(volume_info.rsize > CIFSMaxBufSize) {
			cERROR(1,("rsize %d too large, using MaxBufSize",
				volume_info.rsize));
			cifs_sb->rsize = CIFSMaxBufSize;
		} else if((volume_info.rsize) && (volume_info.rsize <= CIFSMaxBufSize))
L
Linus Torvalds 已提交
1845
			cifs_sb->rsize = volume_info.rsize;
1846 1847 1848 1849 1850 1851 1852 1853
		else /* default */
			cifs_sb->rsize = CIFSMaxBufSize;

		if(volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
			cERROR(1,("wsize %d too large using 4096 instead",
				  volume_info.wsize));
			cifs_sb->wsize = 4096;
		} else if(volume_info.wsize)
L
Linus Torvalds 已提交
1854 1855
			cifs_sb->wsize = volume_info.wsize;
		else
1856
			cifs_sb->wsize = 
S
Steve French 已提交
1857 1858
				min_t(const int, PAGEVEC_SIZE * PAGE_CACHE_SIZE,
					127*1024);
1859 1860 1861 1862 1863 1864 1865
			/* old default of CIFSMaxBufSize was too small now
			   that SMB Write2 can send multiple pages in kvec.   
			   RFC1001 does not describe what happens when frame
			   bigger than 128K is sent so use that as max in
			   conjunction with 52K kvec constraint on arch with 4K
			   page size  */

1866 1867 1868 1869
		if(cifs_sb->rsize < 2048) {
			cifs_sb->rsize = 2048; 
			/* Windows ME may prefer this */
			cFYI(1,("readsize set to minimum 2048"));
L
Linus Torvalds 已提交
1870
		}
1871 1872 1873 1874 1875 1876 1877 1878
		/* calculate prepath */
		cifs_sb->prepath = volume_info.prepath;
		if(cifs_sb->prepath) {
			cifs_sb->prepathlen = strlen(cifs_sb->prepath);
			cifs_sb->prepath[0] = CIFS_DIR_SEP(cifs_sb);
			volume_info.prepath = NULL;
		} else 
			cifs_sb->prepathlen = 0;
L
Linus Torvalds 已提交
1879 1880 1881 1882
		cifs_sb->mnt_uid = volume_info.linux_uid;
		cifs_sb->mnt_gid = volume_info.linux_gid;
		cifs_sb->mnt_file_mode = volume_info.file_mode;
		cifs_sb->mnt_dir_mode = volume_info.dir_mode;
1883 1884
		cFYI(1,("file mode: 0x%x  dir mode: 0x%x",
			cifs_sb->mnt_file_mode,cifs_sb->mnt_dir_mode));
L
Linus Torvalds 已提交
1885 1886 1887 1888 1889 1890 1891

		if(volume_info.noperm)
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
		if(volume_info.setuids)
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
		if(volume_info.server_ino)
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
1892 1893
		if(volume_info.remap)
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
L
Linus Torvalds 已提交
1894 1895
		if(volume_info.no_xattr)
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
1896 1897
		if(volume_info.sfu_emul)
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
1898 1899
		if(volume_info.nobrl)
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
1900 1901
		if(volume_info.cifs_acl)
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
1902

L
Linus Torvalds 已提交
1903
		if(volume_info.direct_io) {
1904
			cFYI(1,("mounting share using direct i/o"));
L
Linus Torvalds 已提交
1905 1906 1907 1908 1909 1910 1911
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO;
		}

		tcon =
		    find_unc(sin_server.sin_addr.s_addr, volume_info.UNC,
			     volume_info.username);
		if (tcon) {
1912
			cFYI(1, ("Found match on UNC path"));
L
Linus Torvalds 已提交
1913 1914 1915 1916 1917
			/* we can have only one retry value for a connection
			   to a share so for resources mounted more than once
			   to the same server share the last value passed in 
			   for the retry flag is used */
			tcon->retry = volume_info.retry;
1918
			tcon->nocase = volume_info.nocase;
L
Linus Torvalds 已提交
1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929
		} else {
			tcon = tconInfoAlloc();
			if (tcon == NULL)
				rc = -ENOMEM;
			else {
				/* check for null share name ie connect to dfs root */

				/* BB check if this works for exactly length three strings */
				if ((strchr(volume_info.UNC + 3, '\\') == NULL)
				    && (strchr(volume_info.UNC + 3, '/') ==
					NULL)) {
1930 1931 1932 1933
					rc = connect_to_dfs_path(xid, pSesInfo,
							"", cifs_sb->local_nls,
							cifs_sb->mnt_cifs_flags & 
							  CIFS_MOUNT_MAP_SPECIAL_CHR);
J
Jesper Juhl 已提交
1934
					kfree(volume_info.UNC);
L
Linus Torvalds 已提交
1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945
					FreeXid(xid);
					return -ENODEV;
				} else {
					rc = CIFSTCon(xid, pSesInfo, 
						volume_info.UNC,
						tcon, cifs_sb->local_nls);
					cFYI(1, ("CIFS Tcon rc = %d", rc));
				}
				if (!rc) {
					atomic_inc(&pSesInfo->inUse);
					tcon->retry = volume_info.retry;
1946
					tcon->nocase = volume_info.nocase;
L
Linus Torvalds 已提交
1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967
				}
			}
		}
	}
	if(pSesInfo) {
		if (pSesInfo->capabilities & CAP_LARGE_FILES) {
			sb->s_maxbytes = (u64) 1 << 63;
		} else
			sb->s_maxbytes = (u64) 1 << 31;	/* 2 GB */
	}

	sb->s_time_gran = 100;

/* on error free sesinfo and tcon struct if needed */
	if (rc) {
		/* if session setup failed, use count is zero but
		we still need to free cifsd thread */
		if(atomic_read(&srvTcp->socketUseCount) == 0) {
			spin_lock(&GlobalMid_Lock);
			srvTcp->tcpStatus = CifsExiting;
			spin_unlock(&GlobalMid_Lock);
1968
			if(srvTcp->tsk) {
L
Linus Torvalds 已提交
1969
				send_sig(SIGKILL,srvTcp->tsk,1);
1970 1971
				wait_for_completion(&cifsd_complete);
			}
L
Linus Torvalds 已提交
1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983
		}
		 /* If find_unc succeeded then rc == 0 so we can not end */
		if (tcon)  /* up accidently freeing someone elses tcon struct */
			tconInfoFree(tcon);
		if (existingCifsSes == NULL) {
			if (pSesInfo) {
				if ((pSesInfo->server) && 
				    (pSesInfo->status == CifsGood)) {
					int temp_rc;
					temp_rc = CIFSSMBLogoff(xid, pSesInfo);
					/* if the socketUseCount is now zero */
					if((temp_rc == -ESHUTDOWN) &&
1984
					   (pSesInfo->server->tsk)) {
L
Linus Torvalds 已提交
1985
						send_sig(SIGKILL,pSesInfo->server->tsk,1);
1986 1987
						wait_for_completion(&cifsd_complete);
					}
L
Linus Torvalds 已提交
1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998
				} else
					cFYI(1, ("No session or bad tcon"));
				sesInfoFree(pSesInfo);
				/* pSesInfo = NULL; */
			}
		}
	} else {
		atomic_inc(&tcon->useCount);
		cifs_sb->tcon = tcon;
		tcon->ses = pSesInfo;

1999
		/* do not care if following two calls succeed - informational */
2000 2001
		CIFSSMBQFSDeviceInfo(xid, tcon);
		CIFSSMBQFSAttributeInfo(xid, tcon);
2002

L
Linus Torvalds 已提交
2003
		if (tcon->ses->capabilities & CAP_UNIX) {
2004
			if(!CIFSSMBQFSUnixInfo(xid, tcon)) {
2005 2006 2007 2008 2009 2010 2011 2012
				__u64 cap = 
				       le64_to_cpu(tcon->fsUnixInfo.Capability);
				cap &= CIFS_UNIX_CAP_MASK;
				if(volume_info.no_psx_acl)
					cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
				else if(CIFS_UNIX_POSIX_ACL_CAP & cap) {
					cFYI(1,("negotiated posix acl support"));
					sb->s_flags |= MS_POSIXACL;
L
Linus Torvalds 已提交
2013
				}
2014

2015 2016 2017 2018 2019 2020 2021 2022 2023
				if(volume_info.posix_paths == 0)
					cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
				else if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
					cFYI(1,("negotiate posix pathnames"));
					cifs_sb->mnt_cifs_flags |= 
						CIFS_MOUNT_POSIX_PATHS;
				}
					
				cFYI(1,("Negotiate caps 0x%x",(int)cap));
2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035
#ifdef CONFIG_CIFS_DEBUG2
				if(cap & CIFS_UNIX_FCNTL_CAP)
					cFYI(1,("FCNTL cap"));
				if(cap & CIFS_UNIX_EXTATTR_CAP)
					cFYI(1,("EXTATTR cap"));
				if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
					cFYI(1,("POSIX path cap"));
				if(cap & CIFS_UNIX_XATTR_CAP)
					cFYI(1,("XATTR cap"));
				if(cap & CIFS_UNIX_POSIX_ACL_CAP)
					cFYI(1,("POSIX ACL cap"));
#endif /* CIFS_DEBUG2 */
2036 2037
				if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
					cFYI(1,("setting capabilities failed"));
2038
				}
L
Linus Torvalds 已提交
2039 2040
			}
		}
2041 2042 2043 2044
		if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
			cifs_sb->wsize = min(cifs_sb->wsize,
					     (tcon->ses->server->maxBuf -
					      MAX_CIFS_HDR_SIZE));
2045 2046 2047 2048
		if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
                        cifs_sb->rsize = min(cifs_sb->rsize,
                                             (tcon->ses->server->maxBuf -
                                              MAX_CIFS_HDR_SIZE));
L
Linus Torvalds 已提交
2049 2050 2051 2052 2053 2054
	}

	/* volume_info.password is freed above when existing session found
	(in which case it is not needed anymore) but when new sesion is created
	the password ptr is put in the new session structure (in which case the
	password will be freed at unmount time) */
J
Jesper Juhl 已提交
2055
	kfree(volume_info.UNC);
2056
	kfree(volume_info.prepath);
L
Linus Torvalds 已提交
2057 2058 2059 2060 2061 2062
	FreeXid(xid);
	return rc;
}

static int
CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2063
	      char session_key[CIFS_SESS_KEY_SIZE],
L
Linus Torvalds 已提交
2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079
	      const struct nls_table *nls_codepage)
{
	struct smb_hdr *smb_buffer;
	struct smb_hdr *smb_buffer_response;
	SESSION_SETUP_ANDX *pSMB;
	SESSION_SETUP_ANDX *pSMBr;
	char *bcc_ptr;
	char *user;
	char *domain;
	int rc = 0;
	int remaining_words = 0;
	int bytes_returned = 0;
	int len;
	__u32 capabilities;
	__u16 count;

2080
	cFYI(1, ("In sesssetup"));
L
Linus Torvalds 已提交
2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095
	if(ses == NULL)
		return -EINVAL;
	user = ses->userName;
	domain = ses->domainName;
	smb_buffer = cifs_buf_get();
	if (smb_buffer == NULL) {
		return -ENOMEM;
	}
	smb_buffer_response = smb_buffer;
	pSMBr = pSMB = (SESSION_SETUP_ANDX *) smb_buffer;

	/* send SMBsessionSetup here */
	header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
			NULL /* no tCon exists yet */ , 13 /* wct */ );

2096
	smb_buffer->Mid = GetNextMid(ses->server);
L
Linus Torvalds 已提交
2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120
	pSMB->req_no_secext.AndXCommand = 0xFF;
	pSMB->req_no_secext.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
	pSMB->req_no_secext.MaxMpxCount = cpu_to_le16(ses->server->maxReq);

	if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
		smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;

	capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
		CAP_LARGE_WRITE_X | CAP_LARGE_READ_X;
	if (ses->capabilities & CAP_UNICODE) {
		smb_buffer->Flags2 |= SMBFLG2_UNICODE;
		capabilities |= CAP_UNICODE;
	}
	if (ses->capabilities & CAP_STATUS32) {
		smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
		capabilities |= CAP_STATUS32;
	}
	if (ses->capabilities & CAP_DFS) {
		smb_buffer->Flags2 |= SMBFLG2_DFS;
		capabilities |= CAP_DFS;
	}
	pSMB->req_no_secext.Capabilities = cpu_to_le32(capabilities);

	pSMB->req_no_secext.CaseInsensitivePasswordLength = 
2121
		cpu_to_le16(CIFS_SESS_KEY_SIZE);
L
Linus Torvalds 已提交
2122 2123

	pSMB->req_no_secext.CaseSensitivePasswordLength =
2124
	    cpu_to_le16(CIFS_SESS_KEY_SIZE);
L
Linus Torvalds 已提交
2125
	bcc_ptr = pByteArea(smb_buffer);
2126 2127 2128 2129
	memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
	bcc_ptr += CIFS_SESS_KEY_SIZE;
	memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
	bcc_ptr += CIFS_SESS_KEY_SIZE;
L
Linus Torvalds 已提交
2130 2131 2132 2133 2134 2135 2136

	if (ses->capabilities & CAP_UNICODE) {
		if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
			*bcc_ptr = 0;
			bcc_ptr++;
		}
		if(user == NULL)
2137
			bytes_returned = 0; /* skip null user */
L
Linus Torvalds 已提交
2138 2139
	        else
			bytes_returned =
2140
			        cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
L
Linus Torvalds 已提交
2141 2142 2143 2144 2145 2146
					nls_codepage);
		/* convert number of 16 bit words to bytes */
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;	/* trailing null */
		if (domain == NULL)
			bytes_returned =
2147
			    cifs_strtoUCS((__le16 *) bcc_ptr,
L
Linus Torvalds 已提交
2148 2149 2150
					  "CIFS_LINUX_DOM", 32, nls_codepage);
		else
			bytes_returned =
2151
			    cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
L
Linus Torvalds 已提交
2152 2153 2154 2155
					  nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;
		bytes_returned =
2156
		    cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
L
Linus Torvalds 已提交
2157 2158 2159
				  32, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bytes_returned =
2160
		    cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release,
L
Linus Torvalds 已提交
2161 2162 2163 2164
				  32, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;
		bytes_returned =
2165
		    cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
L
Linus Torvalds 已提交
2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230
				  64, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;
	} else {
		if(user != NULL) {                
		    strncpy(bcc_ptr, user, 200);
		    bcc_ptr += strnlen(user, 200);
		}
		*bcc_ptr = 0;
		bcc_ptr++;
		if (domain == NULL) {
			strcpy(bcc_ptr, "CIFS_LINUX_DOM");
			bcc_ptr += strlen("CIFS_LINUX_DOM") + 1;
		} else {
			strncpy(bcc_ptr, domain, 64);
			bcc_ptr += strnlen(domain, 64);
			*bcc_ptr = 0;
			bcc_ptr++;
		}
		strcpy(bcc_ptr, "Linux version ");
		bcc_ptr += strlen("Linux version ");
		strcpy(bcc_ptr, system_utsname.release);
		bcc_ptr += strlen(system_utsname.release) + 1;
		strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
		bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
	}
	count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
	smb_buffer->smb_buf_length += count;
	pSMB->req_no_secext.ByteCount = cpu_to_le16(count);

	rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
			 &bytes_returned, 1);
	if (rc) {
/* rc = map_smb_to_linux_error(smb_buffer_response); now done in SendReceive */
	} else if ((smb_buffer_response->WordCount == 3)
		   || (smb_buffer_response->WordCount == 4)) {
		__u16 action = le16_to_cpu(pSMBr->resp.Action);
		__u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);
		if (action & GUEST_LOGIN)
			cFYI(1, (" Guest login"));	/* do we want to mark SesInfo struct ? */
		ses->Suid = smb_buffer_response->Uid;	/* UID left in wire format (le) */
		cFYI(1, ("UID = %d ", ses->Suid));
         /* response can have either 3 or 4 word count - Samba sends 3 */
		bcc_ptr = pByteArea(smb_buffer_response);	
		if ((pSMBr->resp.hdr.WordCount == 3)
		    || ((pSMBr->resp.hdr.WordCount == 4)
			&& (blob_len < pSMBr->resp.ByteCount))) {
			if (pSMBr->resp.hdr.WordCount == 4)
				bcc_ptr += blob_len;

			if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
				if ((long) (bcc_ptr) % 2) {
					remaining_words =
					    (BCC(smb_buffer_response) - 1) /2;
					bcc_ptr++;	/* Unicode strings must be word aligned */
				} else {
					remaining_words =
						BCC(smb_buffer_response) / 2;
				}
				len =
				    UniStrnlen((wchar_t *) bcc_ptr,
					       remaining_words - 1);
/* We look for obvious messed up bcc or strings in response so we do not go off
   the end since (at least) WIN2K and Windows XP have a major bug in not null
   terminating last Unicode string in response  */
2231 2232
				if(ses->serverOS)
					kfree(ses->serverOS);
2233
				ses->serverOS = kzalloc(2 * (len + 1), GFP_KERNEL);
2234 2235
				if(ses->serverOS == NULL)
					goto sesssetup_nomem;
L
Linus Torvalds 已提交
2236
				cifs_strfromUCS_le(ses->serverOS,
2237
					   (__le16 *)bcc_ptr, len,nls_codepage);
L
Linus Torvalds 已提交
2238 2239 2240 2241 2242 2243 2244
				bcc_ptr += 2 * (len + 1);
				remaining_words -= len + 1;
				ses->serverOS[2 * len] = 0;
				ses->serverOS[1 + (2 * len)] = 0;
				if (remaining_words > 0) {
					len = UniStrnlen((wchar_t *)bcc_ptr,
							 remaining_words-1);
2245
					kfree(ses->serverNOS);
2246
					ses->serverNOS = kzalloc(2 * (len + 1),GFP_KERNEL);
2247 2248
					if(ses->serverNOS == NULL)
						goto sesssetup_nomem;
L
Linus Torvalds 已提交
2249
					cifs_strfromUCS_le(ses->serverNOS,
2250
							   (__le16 *)bcc_ptr,len,nls_codepage);
L
Linus Torvalds 已提交
2251 2252 2253 2254 2255 2256 2257 2258 2259 2260
					bcc_ptr += 2 * (len + 1);
					ses->serverNOS[2 * len] = 0;
					ses->serverNOS[1 + (2 * len)] = 0;
					if(strncmp(ses->serverNOS,
						"NT LAN Manager 4",16) == 0) {
						cFYI(1,("NT4 server"));
						ses->flags |= CIFS_SES_NT4;
					}
					remaining_words -= len + 1;
					if (remaining_words > 0) {
2261
						len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
L
Linus Torvalds 已提交
2262
          /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2263 2264
						if(ses->serverDomain)
							kfree(ses->serverDomain);
L
Linus Torvalds 已提交
2265
						ses->serverDomain =
2266
						    kzalloc(2*(len+1),GFP_KERNEL);
2267 2268
						if(ses->serverDomain == NULL)
							goto sesssetup_nomem;
L
Linus Torvalds 已提交
2269
						cifs_strfromUCS_le(ses->serverDomain,
2270
						     (__le16 *)bcc_ptr,len,nls_codepage);
L
Linus Torvalds 已提交
2271 2272 2273 2274
						bcc_ptr += 2 * (len + 1);
						ses->serverDomain[2*len] = 0;
						ses->serverDomain[1+(2*len)] = 0;
					} /* else no more room so create dummy domain string */
2275 2276 2277
					else {
						if(ses->serverDomain)
							kfree(ses->serverDomain);
2278
						ses->serverDomain = 
2279
							kzalloc(2, GFP_KERNEL);
2280
					}
L
Linus Torvalds 已提交
2281
				} else {	/* no room so create dummy domain and NOS string */
2282 2283 2284
					/* if these kcallocs fail not much we
					   can do, but better to not fail the
					   sesssetup itself */
2285
					kfree(ses->serverDomain);
L
Linus Torvalds 已提交
2286
					ses->serverDomain =
2287
					    kzalloc(2, GFP_KERNEL);
2288
					kfree(ses->serverNOS);
L
Linus Torvalds 已提交
2289
					ses->serverNOS =
2290
					    kzalloc(2, GFP_KERNEL);
L
Linus Torvalds 已提交
2291 2292 2293 2294 2295 2296
				}
			} else {	/* ASCII */
				len = strnlen(bcc_ptr, 1024);
				if (((long) bcc_ptr + len) - (long)
				    pByteArea(smb_buffer_response)
					    <= BCC(smb_buffer_response)) {
2297
					kfree(ses->serverOS);
2298
					ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
2299 2300
					if(ses->serverOS == NULL)
						goto sesssetup_nomem;
L
Linus Torvalds 已提交
2301 2302 2303 2304 2305 2306 2307
					strncpy(ses->serverOS,bcc_ptr, len);

					bcc_ptr += len;
					bcc_ptr[0] = 0;	/* null terminate the string */
					bcc_ptr++;

					len = strnlen(bcc_ptr, 1024);
2308
					kfree(ses->serverNOS);
2309
					ses->serverNOS = kzalloc(len + 1,GFP_KERNEL);
2310 2311
					if(ses->serverNOS == NULL)
						goto sesssetup_nomem;
L
Linus Torvalds 已提交
2312 2313 2314 2315 2316 2317
					strncpy(ses->serverNOS, bcc_ptr, len);
					bcc_ptr += len;
					bcc_ptr[0] = 0;
					bcc_ptr++;

					len = strnlen(bcc_ptr, 1024);
2318 2319
					if(ses->serverDomain)
						kfree(ses->serverDomain);
2320
					ses->serverDomain = kzalloc(len + 1,GFP_KERNEL);
2321 2322
					if(ses->serverDomain == NULL)
						goto sesssetup_nomem;
L
Linus Torvalds 已提交
2323 2324 2325 2326 2327 2328 2329 2330 2331 2332 2333 2334 2335 2336 2337 2338 2339 2340 2341
					strncpy(ses->serverDomain, bcc_ptr, len);
					bcc_ptr += len;
					bcc_ptr[0] = 0;
					bcc_ptr++;
				} else
					cFYI(1,
					     ("Variable field of length %d extends beyond end of smb ",
					      len));
			}
		} else {
			cERROR(1,
			       (" Security Blob Length extends beyond end of SMB"));
		}
	} else {
		cERROR(1,
		       (" Invalid Word count %d: ",
			smb_buffer_response->WordCount));
		rc = -EIO;
	}
2342 2343 2344
sesssetup_nomem:	/* do not return an error on nomem for the info strings,
			   since that could make reconnection harder, and
			   reconnection might be needed to free memory */
L
Linus Torvalds 已提交
2345 2346 2347 2348 2349 2350 2351 2352 2353 2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364 2365 2366 2367 2368 2369 2370 2371
	if (smb_buffer)
		cifs_buf_release(smb_buffer);

	return rc;
}

static int
CIFSNTLMSSPNegotiateSessSetup(unsigned int xid,
			      struct cifsSesInfo *ses, int * pNTLMv2_flag,
			      const struct nls_table *nls_codepage)
{
	struct smb_hdr *smb_buffer;
	struct smb_hdr *smb_buffer_response;
	SESSION_SETUP_ANDX *pSMB;
	SESSION_SETUP_ANDX *pSMBr;
	char *bcc_ptr;
	char *domain;
	int rc = 0;
	int remaining_words = 0;
	int bytes_returned = 0;
	int len;
	int SecurityBlobLength = sizeof (NEGOTIATE_MESSAGE);
	PNEGOTIATE_MESSAGE SecurityBlob;
	PCHALLENGE_MESSAGE SecurityBlob2;
	__u32 negotiate_flags, capabilities;
	__u16 count;

2372
	cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
L
Linus Torvalds 已提交
2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387
	if(ses == NULL)
		return -EINVAL;
	domain = ses->domainName;
	*pNTLMv2_flag = FALSE;
	smb_buffer = cifs_buf_get();
	if (smb_buffer == NULL) {
		return -ENOMEM;
	}
	smb_buffer_response = smb_buffer;
	pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
	pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;

	/* send SMBsessionSetup here */
	header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
			NULL /* no tCon exists yet */ , 12 /* wct */ );
2388 2389

	smb_buffer->Mid = GetNextMid(ses->server);
L
Linus Torvalds 已提交
2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410 2411 2412 2413 2414 2415 2416 2417 2418 2419 2420 2421
	pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
	pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);

	pSMB->req.AndXCommand = 0xFF;
	pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
	pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);

	if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
		smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;

	capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
	    CAP_EXTENDED_SECURITY;
	if (ses->capabilities & CAP_UNICODE) {
		smb_buffer->Flags2 |= SMBFLG2_UNICODE;
		capabilities |= CAP_UNICODE;
	}
	if (ses->capabilities & CAP_STATUS32) {
		smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
		capabilities |= CAP_STATUS32;
	}
	if (ses->capabilities & CAP_DFS) {
		smb_buffer->Flags2 |= SMBFLG2_DFS;
		capabilities |= CAP_DFS;
	}
	pSMB->req.Capabilities = cpu_to_le32(capabilities);

	bcc_ptr = (char *) &pSMB->req.SecurityBlob;
	SecurityBlob = (PNEGOTIATE_MESSAGE) bcc_ptr;
	strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
	SecurityBlob->MessageType = NtLmNegotiate;
	negotiate_flags =
	    NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_NEGOTIATE_OEM |
2422 2423
	    NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
	    NTLMSSP_NEGOTIATE_56 |
L
Linus Torvalds 已提交
2424 2425 2426
	    /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
	if(sign_CIFS_PDUs)
		negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
2427 2428
/*	if(ntlmv2_support)
		negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;*/
L
Linus Torvalds 已提交
2429 2430 2431 2432 2433 2434 2435
	/* setup pointers to domain name and workstation name */
	bcc_ptr += SecurityBlobLength;

	SecurityBlob->WorkstationName.Buffer = 0;
	SecurityBlob->WorkstationName.Length = 0;
	SecurityBlob->WorkstationName.MaximumLength = 0;

2436 2437 2438 2439 2440
	/* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
	along with username on auth request (ie the response to challenge) */
	SecurityBlob->DomainName.Buffer = 0;
	SecurityBlob->DomainName.Length = 0;
	SecurityBlob->DomainName.MaximumLength = 0;
L
Linus Torvalds 已提交
2441 2442 2443 2444 2445 2446 2447
	if (ses->capabilities & CAP_UNICODE) {
		if ((long) bcc_ptr % 2) {
			*bcc_ptr = 0;
			bcc_ptr++;
		}

		bytes_returned =
2448
		    cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
L
Linus Torvalds 已提交
2449 2450 2451
				  32, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bytes_returned =
2452
		    cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release, 32,
L
Linus Torvalds 已提交
2453 2454 2455 2456
				  nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;	/* null terminate Linux version */
		bytes_returned =
2457
		    cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
L
Linus Torvalds 已提交
2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490 2491 2492 2493 2494 2495 2496 2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509
				  64, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		*(bcc_ptr + 1) = 0;
		*(bcc_ptr + 2) = 0;
		bcc_ptr += 2;	/* null terminate network opsys string */
		*(bcc_ptr + 1) = 0;
		*(bcc_ptr + 2) = 0;
		bcc_ptr += 2;	/* null domain */
	} else {		/* ASCII */
		strcpy(bcc_ptr, "Linux version ");
		bcc_ptr += strlen("Linux version ");
		strcpy(bcc_ptr, system_utsname.release);
		bcc_ptr += strlen(system_utsname.release) + 1;
		strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
		bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
		bcc_ptr++;	/* empty domain field */
		*bcc_ptr = 0;
	}
	SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
	pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
	count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
	smb_buffer->smb_buf_length += count;
	pSMB->req.ByteCount = cpu_to_le16(count);

	rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
			 &bytes_returned, 1);

	if (smb_buffer_response->Status.CifsError ==
	    cpu_to_le32(NT_STATUS_MORE_PROCESSING_REQUIRED))
		rc = 0;

	if (rc) {
/*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
	} else if ((smb_buffer_response->WordCount == 3)
		   || (smb_buffer_response->WordCount == 4)) {
		__u16 action = le16_to_cpu(pSMBr->resp.Action);
		__u16 blob_len = le16_to_cpu(pSMBr->resp.SecurityBlobLength);

		if (action & GUEST_LOGIN)
			cFYI(1, (" Guest login"));	
        /* Do we want to set anything in SesInfo struct when guest login? */

		bcc_ptr = pByteArea(smb_buffer_response);	
        /* response can have either 3 or 4 word count - Samba sends 3 */

		SecurityBlob2 = (PCHALLENGE_MESSAGE) bcc_ptr;
		if (SecurityBlob2->MessageType != NtLmChallenge) {
			cFYI(1,
			     ("Unexpected NTLMSSP message type received %d",
			      SecurityBlob2->MessageType));
		} else if (ses) {
			ses->Suid = smb_buffer_response->Uid; /* UID left in le format */ 
2510
			cFYI(1, ("UID = %d", ses->Suid));
L
Linus Torvalds 已提交
2511 2512 2513 2514 2515 2516 2517
			if ((pSMBr->resp.hdr.WordCount == 3)
			    || ((pSMBr->resp.hdr.WordCount == 4)
				&& (blob_len <
				    pSMBr->resp.ByteCount))) {

				if (pSMBr->resp.hdr.WordCount == 4) {
					bcc_ptr += blob_len;
2518
					cFYI(1, ("Security Blob Length %d",
L
Linus Torvalds 已提交
2519 2520 2521
					      blob_len));
				}

2522
				cFYI(1, ("NTLMSSP Challenge rcvd"));
L
Linus Torvalds 已提交
2523 2524 2525 2526

				memcpy(ses->server->cryptKey,
				       SecurityBlob2->Challenge,
				       CIFS_CRYPTO_KEY_SIZE);
2527 2528
				if(SecurityBlob2->NegotiateFlags & 
					cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
L
Linus Torvalds 已提交
2529 2530 2531 2532 2533 2534 2535 2536 2537 2538 2539 2540 2541 2542 2543 2544 2545 2546 2547 2548 2549 2550 2551 2552 2553 2554 2555 2556 2557
					*pNTLMv2_flag = TRUE;

				if((SecurityBlob2->NegotiateFlags & 
					cpu_to_le32(NTLMSSP_NEGOTIATE_ALWAYS_SIGN)) 
					|| (sign_CIFS_PDUs > 1))
						ses->server->secMode |= 
							SECMODE_SIGN_REQUIRED;	
				if ((SecurityBlob2->NegotiateFlags & 
					cpu_to_le32(NTLMSSP_NEGOTIATE_SIGN)) && (sign_CIFS_PDUs))
						ses->server->secMode |= 
							SECMODE_SIGN_ENABLED;

				if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
					if ((long) (bcc_ptr) % 2) {
						remaining_words =
						    (BCC(smb_buffer_response)
						     - 1) / 2;
						bcc_ptr++;	/* Unicode strings must be word aligned */
					} else {
						remaining_words =
						    BCC
						    (smb_buffer_response) / 2;
					}
					len =
					    UniStrnlen((wchar_t *) bcc_ptr,
						       remaining_words - 1);
/* We look for obvious messed up bcc or strings in response so we do not go off
   the end since (at least) WIN2K and Windows XP have a major bug in not null
   terminating last Unicode string in response  */
2558 2559
					if(ses->serverOS)
						kfree(ses->serverOS);
L
Linus Torvalds 已提交
2560
					ses->serverOS =
2561
					    kzalloc(2 * (len + 1), GFP_KERNEL);
L
Linus Torvalds 已提交
2562
					cifs_strfromUCS_le(ses->serverOS,
2563
							   (__le16 *)
L
Linus Torvalds 已提交
2564 2565 2566 2567 2568 2569 2570 2571 2572 2573 2574
							   bcc_ptr, len,
							   nls_codepage);
					bcc_ptr += 2 * (len + 1);
					remaining_words -= len + 1;
					ses->serverOS[2 * len] = 0;
					ses->serverOS[1 + (2 * len)] = 0;
					if (remaining_words > 0) {
						len = UniStrnlen((wchar_t *)
								 bcc_ptr,
								 remaining_words
								 - 1);
2575
						kfree(ses->serverNOS);
L
Linus Torvalds 已提交
2576
						ses->serverNOS =
2577
						    kzalloc(2 * (len + 1),
L
Linus Torvalds 已提交
2578 2579 2580
							    GFP_KERNEL);
						cifs_strfromUCS_le(ses->
								   serverNOS,
2581
								   (__le16 *)
L
Linus Torvalds 已提交
2582 2583 2584 2585 2586 2587 2588 2589 2590 2591 2592
								   bcc_ptr,
								   len,
								   nls_codepage);
						bcc_ptr += 2 * (len + 1);
						ses->serverNOS[2 * len] = 0;
						ses->serverNOS[1 +
							       (2 * len)] = 0;
						remaining_words -= len + 1;
						if (remaining_words > 0) {
							len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);	
           /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2593
							kfree(ses->serverDomain);
L
Linus Torvalds 已提交
2594
							ses->serverDomain =
2595
							    kzalloc(2 *
L
Linus Torvalds 已提交
2596 2597 2598 2599
								    (len +
								     1),
								    GFP_KERNEL);
							cifs_strfromUCS_le
2600 2601 2602
							    (ses->serverDomain,
							     (__le16 *)bcc_ptr,
							     len, nls_codepage);
L
Linus Torvalds 已提交
2603 2604
							bcc_ptr +=
							    2 * (len + 1);
2605
							ses->serverDomain[2*len]
L
Linus Torvalds 已提交
2606
							    = 0;
2607 2608
							ses->serverDomain
								[1 + (2 * len)]
L
Linus Torvalds 已提交
2609 2610
							    = 0;
						} /* else no more room so create dummy domain string */
2611
						else {
2612
							kfree(ses->serverDomain);
L
Linus Torvalds 已提交
2613
							ses->serverDomain =
2614
							    kzalloc(2,
L
Linus Torvalds 已提交
2615
								    GFP_KERNEL);
2616
						}
L
Linus Torvalds 已提交
2617
					} else {	/* no room so create dummy domain and NOS string */
2618
						kfree(ses->serverDomain);
L
Linus Torvalds 已提交
2619
						ses->serverDomain =
2620
						    kzalloc(2, GFP_KERNEL);
2621
						kfree(ses->serverNOS);
L
Linus Torvalds 已提交
2622
						ses->serverNOS =
2623
						    kzalloc(2, GFP_KERNEL);
L
Linus Torvalds 已提交
2624 2625 2626 2627 2628 2629
					}
				} else {	/* ASCII */
					len = strnlen(bcc_ptr, 1024);
					if (((long) bcc_ptr + len) - (long)
					    pByteArea(smb_buffer_response)
					    <= BCC(smb_buffer_response)) {
2630 2631
						if(ses->serverOS)
							kfree(ses->serverOS);
L
Linus Torvalds 已提交
2632
						ses->serverOS =
2633
						    kzalloc(len + 1,
L
Linus Torvalds 已提交
2634 2635 2636 2637 2638 2639 2640 2641 2642
							    GFP_KERNEL);
						strncpy(ses->serverOS,
							bcc_ptr, len);

						bcc_ptr += len;
						bcc_ptr[0] = 0;	/* null terminate string */
						bcc_ptr++;

						len = strnlen(bcc_ptr, 1024);
2643
						kfree(ses->serverNOS);
L
Linus Torvalds 已提交
2644
						ses->serverNOS =
2645
						    kzalloc(len + 1,
L
Linus Torvalds 已提交
2646 2647 2648 2649 2650 2651 2652
							    GFP_KERNEL);
						strncpy(ses->serverNOS, bcc_ptr, len);
						bcc_ptr += len;
						bcc_ptr[0] = 0;
						bcc_ptr++;

						len = strnlen(bcc_ptr, 1024);
2653
						kfree(ses->serverDomain);
L
Linus Torvalds 已提交
2654
						ses->serverDomain =
2655
						    kzalloc(len + 1,
L
Linus Torvalds 已提交
2656 2657 2658 2659 2660 2661 2662
							    GFP_KERNEL);
						strncpy(ses->serverDomain, bcc_ptr, len);	
						bcc_ptr += len;
						bcc_ptr[0] = 0;
						bcc_ptr++;
					} else
						cFYI(1,
2663
						     ("Variable field of length %d extends beyond end of smb",
L
Linus Torvalds 已提交
2664 2665 2666 2667 2668 2669 2670 2671 2672 2673 2674
						      len));
				}
			} else {
				cERROR(1,
				       (" Security Blob Length extends beyond end of SMB"));
			}
		} else {
			cERROR(1, ("No session structure passed in."));
		}
	} else {
		cERROR(1,
2675
		       (" Invalid Word count %d:",
L
Linus Torvalds 已提交
2676 2677 2678 2679 2680 2681 2682 2683 2684 2685 2686 2687 2688 2689 2690 2691 2692 2693 2694 2695 2696 2697 2698 2699 2700 2701 2702 2703 2704 2705 2706 2707 2708 2709 2710 2711 2712 2713 2714 2715 2716 2717 2718 2719 2720 2721
			smb_buffer_response->WordCount));
		rc = -EIO;
	}

	if (smb_buffer)
		cifs_buf_release(smb_buffer);

	return rc;
}
static int
CIFSNTLMSSPAuthSessSetup(unsigned int xid, struct cifsSesInfo *ses,
		char *ntlm_session_key, int ntlmv2_flag,
		const struct nls_table *nls_codepage)
{
	struct smb_hdr *smb_buffer;
	struct smb_hdr *smb_buffer_response;
	SESSION_SETUP_ANDX *pSMB;
	SESSION_SETUP_ANDX *pSMBr;
	char *bcc_ptr;
	char *user;
	char *domain;
	int rc = 0;
	int remaining_words = 0;
	int bytes_returned = 0;
	int len;
	int SecurityBlobLength = sizeof (AUTHENTICATE_MESSAGE);
	PAUTHENTICATE_MESSAGE SecurityBlob;
	__u32 negotiate_flags, capabilities;
	__u16 count;

	cFYI(1, ("In NTLMSSPSessSetup (Authenticate)"));
	if(ses == NULL)
		return -EINVAL;
	user = ses->userName;
	domain = ses->domainName;
	smb_buffer = cifs_buf_get();
	if (smb_buffer == NULL) {
		return -ENOMEM;
	}
	smb_buffer_response = smb_buffer;
	pSMB = (SESSION_SETUP_ANDX *) smb_buffer;
	pSMBr = (SESSION_SETUP_ANDX *) smb_buffer_response;

	/* send SMBsessionSetup here */
	header_assemble(smb_buffer, SMB_COM_SESSION_SETUP_ANDX,
			NULL /* no tCon exists yet */ , 12 /* wct */ );
2722 2723

	smb_buffer->Mid = GetNextMid(ses->server);
L
Linus Torvalds 已提交
2724 2725 2726 2727 2728 2729 2730 2731 2732 2733 2734 2735 2736 2737 2738 2739 2740 2741 2742 2743 2744 2745 2746 2747 2748 2749 2750 2751 2752 2753 2754 2755 2756 2757 2758 2759 2760 2761 2762 2763 2764 2765 2766 2767 2768 2769 2770 2771 2772 2773 2774 2775 2776 2777 2778
	pSMB->req.hdr.Flags |= (SMBFLG_CASELESS | SMBFLG_CANONICAL_PATH_FORMAT);
	pSMB->req.hdr.Flags2 |= SMBFLG2_EXT_SEC;
	pSMB->req.AndXCommand = 0xFF;
	pSMB->req.MaxBufferSize = cpu_to_le16(ses->server->maxBuf);
	pSMB->req.MaxMpxCount = cpu_to_le16(ses->server->maxReq);

	pSMB->req.hdr.Uid = ses->Suid;

	if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
		smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;

	capabilities = CAP_LARGE_FILES | CAP_NT_SMBS | CAP_LEVEL_II_OPLOCKS |
	    CAP_EXTENDED_SECURITY;
	if (ses->capabilities & CAP_UNICODE) {
		smb_buffer->Flags2 |= SMBFLG2_UNICODE;
		capabilities |= CAP_UNICODE;
	}
	if (ses->capabilities & CAP_STATUS32) {
		smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
		capabilities |= CAP_STATUS32;
	}
	if (ses->capabilities & CAP_DFS) {
		smb_buffer->Flags2 |= SMBFLG2_DFS;
		capabilities |= CAP_DFS;
	}
	pSMB->req.Capabilities = cpu_to_le32(capabilities);

	bcc_ptr = (char *) &pSMB->req.SecurityBlob;
	SecurityBlob = (PAUTHENTICATE_MESSAGE) bcc_ptr;
	strncpy(SecurityBlob->Signature, NTLMSSP_SIGNATURE, 8);
	SecurityBlob->MessageType = NtLmAuthenticate;
	bcc_ptr += SecurityBlobLength;
	negotiate_flags = 
	    NTLMSSP_NEGOTIATE_UNICODE | NTLMSSP_REQUEST_TARGET |
	    NTLMSSP_NEGOTIATE_NTLM | NTLMSSP_NEGOTIATE_TARGET_INFO |
	    0x80000000 | NTLMSSP_NEGOTIATE_128;
	if(sign_CIFS_PDUs)
		negotiate_flags |= /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN |*/ NTLMSSP_NEGOTIATE_SIGN;
	if(ntlmv2_flag)
		negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;

/* setup pointers to domain name and workstation name */

	SecurityBlob->WorkstationName.Buffer = 0;
	SecurityBlob->WorkstationName.Length = 0;
	SecurityBlob->WorkstationName.MaximumLength = 0;
	SecurityBlob->SessionKey.Length = 0;
	SecurityBlob->SessionKey.MaximumLength = 0;
	SecurityBlob->SessionKey.Buffer = 0;

	SecurityBlob->LmChallengeResponse.Length = 0;
	SecurityBlob->LmChallengeResponse.MaximumLength = 0;
	SecurityBlob->LmChallengeResponse.Buffer = 0;

	SecurityBlob->NtChallengeResponse.Length =
2779
	    cpu_to_le16(CIFS_SESS_KEY_SIZE);
L
Linus Torvalds 已提交
2780
	SecurityBlob->NtChallengeResponse.MaximumLength =
2781 2782
	    cpu_to_le16(CIFS_SESS_KEY_SIZE);
	memcpy(bcc_ptr, ntlm_session_key, CIFS_SESS_KEY_SIZE);
L
Linus Torvalds 已提交
2783 2784
	SecurityBlob->NtChallengeResponse.Buffer =
	    cpu_to_le32(SecurityBlobLength);
2785 2786
	SecurityBlobLength += CIFS_SESS_KEY_SIZE;
	bcc_ptr += CIFS_SESS_KEY_SIZE;
L
Linus Torvalds 已提交
2787 2788 2789 2790 2791 2792 2793 2794

	if (ses->capabilities & CAP_UNICODE) {
		if (domain == NULL) {
			SecurityBlob->DomainName.Buffer = 0;
			SecurityBlob->DomainName.Length = 0;
			SecurityBlob->DomainName.MaximumLength = 0;
		} else {
			__u16 len =
2795
			    cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
L
Linus Torvalds 已提交
2796 2797 2798 2799 2800 2801 2802 2803 2804 2805 2806 2807 2808 2809 2810 2811 2812
					  nls_codepage);
			len *= 2;
			SecurityBlob->DomainName.MaximumLength =
			    cpu_to_le16(len);
			SecurityBlob->DomainName.Buffer =
			    cpu_to_le32(SecurityBlobLength);
			bcc_ptr += len;
			SecurityBlobLength += len;
			SecurityBlob->DomainName.Length =
			    cpu_to_le16(len);
		}
		if (user == NULL) {
			SecurityBlob->UserName.Buffer = 0;
			SecurityBlob->UserName.Length = 0;
			SecurityBlob->UserName.MaximumLength = 0;
		} else {
			__u16 len =
2813
			    cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
L
Linus Torvalds 已提交
2814 2815 2816 2817 2818 2819 2820 2821 2822 2823 2824 2825
					  nls_codepage);
			len *= 2;
			SecurityBlob->UserName.MaximumLength =
			    cpu_to_le16(len);
			SecurityBlob->UserName.Buffer =
			    cpu_to_le32(SecurityBlobLength);
			bcc_ptr += len;
			SecurityBlobLength += len;
			SecurityBlob->UserName.Length =
			    cpu_to_le16(len);
		}

2826
		/* SecurityBlob->WorkstationName.Length = cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
L
Linus Torvalds 已提交
2827 2828 2829 2830 2831 2832 2833 2834 2835 2836 2837 2838
		   SecurityBlob->WorkstationName.Length *= 2;
		   SecurityBlob->WorkstationName.MaximumLength = cpu_to_le16(SecurityBlob->WorkstationName.Length);
		   SecurityBlob->WorkstationName.Buffer = cpu_to_le32(SecurityBlobLength);
		   bcc_ptr += SecurityBlob->WorkstationName.Length;
		   SecurityBlobLength += SecurityBlob->WorkstationName.Length;
		   SecurityBlob->WorkstationName.Length = cpu_to_le16(SecurityBlob->WorkstationName.Length);  */

		if ((long) bcc_ptr % 2) {
			*bcc_ptr = 0;
			bcc_ptr++;
		}
		bytes_returned =
2839
		    cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
L
Linus Torvalds 已提交
2840 2841 2842
				  32, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bytes_returned =
2843
		    cifs_strtoUCS((__le16 *) bcc_ptr, system_utsname.release, 32,
L
Linus Torvalds 已提交
2844 2845 2846 2847
				  nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;	/* null term version string */
		bytes_returned =
2848
		    cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
L
Linus Torvalds 已提交
2849 2850 2851 2852 2853 2854 2855 2856 2857 2858 2859 2860 2861 2862 2863 2864 2865 2866 2867 2868 2869 2870 2871 2872 2873 2874 2875 2876 2877 2878 2879 2880 2881 2882 2883 2884 2885 2886 2887 2888 2889 2890 2891 2892 2893 2894 2895 2896 2897 2898 2899 2900 2901 2902 2903 2904 2905 2906 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2918 2919 2920 2921 2922 2923 2924 2925 2926 2927 2928 2929 2930 2931 2932 2933 2934 2935 2936 2937 2938 2939 2940 2941 2942 2943 2944 2945 2946 2947 2948 2949 2950 2951 2952 2953 2954 2955 2956 2957
				  64, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		*(bcc_ptr + 1) = 0;
		*(bcc_ptr + 2) = 0;
		bcc_ptr += 2;	/* null terminate network opsys string */
		*(bcc_ptr + 1) = 0;
		*(bcc_ptr + 2) = 0;
		bcc_ptr += 2;	/* null domain */
	} else {		/* ASCII */
		if (domain == NULL) {
			SecurityBlob->DomainName.Buffer = 0;
			SecurityBlob->DomainName.Length = 0;
			SecurityBlob->DomainName.MaximumLength = 0;
		} else {
			__u16 len;
			negotiate_flags |= NTLMSSP_NEGOTIATE_DOMAIN_SUPPLIED;
			strncpy(bcc_ptr, domain, 63);
			len = strnlen(domain, 64);
			SecurityBlob->DomainName.MaximumLength =
			    cpu_to_le16(len);
			SecurityBlob->DomainName.Buffer =
			    cpu_to_le32(SecurityBlobLength);
			bcc_ptr += len;
			SecurityBlobLength += len;
			SecurityBlob->DomainName.Length = cpu_to_le16(len);
		}
		if (user == NULL) {
			SecurityBlob->UserName.Buffer = 0;
			SecurityBlob->UserName.Length = 0;
			SecurityBlob->UserName.MaximumLength = 0;
		} else {
			__u16 len;
			strncpy(bcc_ptr, user, 63);
			len = strnlen(user, 64);
			SecurityBlob->UserName.MaximumLength =
			    cpu_to_le16(len);
			SecurityBlob->UserName.Buffer =
			    cpu_to_le32(SecurityBlobLength);
			bcc_ptr += len;
			SecurityBlobLength += len;
			SecurityBlob->UserName.Length = cpu_to_le16(len);
		}
		/* BB fill in our workstation name if known BB */

		strcpy(bcc_ptr, "Linux version ");
		bcc_ptr += strlen("Linux version ");
		strcpy(bcc_ptr, system_utsname.release);
		bcc_ptr += strlen(system_utsname.release) + 1;
		strcpy(bcc_ptr, CIFS_NETWORK_OPSYS);
		bcc_ptr += strlen(CIFS_NETWORK_OPSYS) + 1;
		bcc_ptr++;	/* null domain */
		*bcc_ptr = 0;
	}
	SecurityBlob->NegotiateFlags = cpu_to_le32(negotiate_flags);
	pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
	count = (long) bcc_ptr - (long) pByteArea(smb_buffer);
	smb_buffer->smb_buf_length += count;
	pSMB->req.ByteCount = cpu_to_le16(count);

	rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response,
			 &bytes_returned, 1);
	if (rc) {
/*    rc = map_smb_to_linux_error(smb_buffer_response);  *//* done in SendReceive now */
	} else if ((smb_buffer_response->WordCount == 3)
		   || (smb_buffer_response->WordCount == 4)) {
		__u16 action = le16_to_cpu(pSMBr->resp.Action);
		__u16 blob_len =
		    le16_to_cpu(pSMBr->resp.SecurityBlobLength);
		if (action & GUEST_LOGIN)
			cFYI(1, (" Guest login"));	/* BB do we want to set anything in SesInfo struct ? */
/*        if(SecurityBlob2->MessageType != NtLm??){                               
                 cFYI("Unexpected message type on auth response is %d ")); 
        } */
		if (ses) {
			cFYI(1,
			     ("Does UID on challenge %d match auth response UID %d ",
			      ses->Suid, smb_buffer_response->Uid));
			ses->Suid = smb_buffer_response->Uid; /* UID left in wire format */
			bcc_ptr = pByteArea(smb_buffer_response);	
            /* response can have either 3 or 4 word count - Samba sends 3 */
			if ((pSMBr->resp.hdr.WordCount == 3)
			    || ((pSMBr->resp.hdr.WordCount == 4)
				&& (blob_len <
				    pSMBr->resp.ByteCount))) {
				if (pSMBr->resp.hdr.WordCount == 4) {
					bcc_ptr +=
					    blob_len;
					cFYI(1,
					     ("Security Blob Length %d ",
					      blob_len));
				}

				cFYI(1,
				     ("NTLMSSP response to Authenticate "));

				if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
					if ((long) (bcc_ptr) % 2) {
						remaining_words =
						    (BCC(smb_buffer_response)
						     - 1) / 2;
						bcc_ptr++;	/* Unicode strings must be word aligned */
					} else {
						remaining_words = BCC(smb_buffer_response) / 2;
					}
					len =
					    UniStrnlen((wchar_t *) bcc_ptr,remaining_words - 1);
/* We look for obvious messed up bcc or strings in response so we do not go off
  the end since (at least) WIN2K and Windows XP have a major bug in not null
  terminating last Unicode string in response  */
2958
					if(ses->serverOS)
S
Steve French 已提交
2959
						kfree(ses->serverOS);
L
Linus Torvalds 已提交
2960
					ses->serverOS =
2961
					    kzalloc(2 * (len + 1), GFP_KERNEL);
L
Linus Torvalds 已提交
2962
					cifs_strfromUCS_le(ses->serverOS,
2963
							   (__le16 *)
L
Linus Torvalds 已提交
2964 2965 2966 2967 2968 2969 2970 2971 2972 2973 2974
							   bcc_ptr, len,
							   nls_codepage);
					bcc_ptr += 2 * (len + 1);
					remaining_words -= len + 1;
					ses->serverOS[2 * len] = 0;
					ses->serverOS[1 + (2 * len)] = 0;
					if (remaining_words > 0) {
						len = UniStrnlen((wchar_t *)
								 bcc_ptr,
								 remaining_words
								 - 1);
2975
						kfree(ses->serverNOS);
L
Linus Torvalds 已提交
2976
						ses->serverNOS =
2977
						    kzalloc(2 * (len + 1),
L
Linus Torvalds 已提交
2978 2979 2980
							    GFP_KERNEL);
						cifs_strfromUCS_le(ses->
								   serverNOS,
2981
								   (__le16 *)
L
Linus Torvalds 已提交
2982 2983 2984 2985 2986 2987 2988 2989 2990 2991
								   bcc_ptr,
								   len,
								   nls_codepage);
						bcc_ptr += 2 * (len + 1);
						ses->serverNOS[2 * len] = 0;
						ses->serverNOS[1+(2*len)] = 0;
						remaining_words -= len + 1;
						if (remaining_words > 0) {
							len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);	
     /* last string not always null terminated (e.g. for Windows XP & 2000) */
2992 2993
							if(ses->serverDomain)
								kfree(ses->serverDomain);
L
Linus Torvalds 已提交
2994
							ses->serverDomain =
2995
							    kzalloc(2 *
L
Linus Torvalds 已提交
2996 2997 2998 2999 3000 3001
								    (len +
								     1),
								    GFP_KERNEL);
							cifs_strfromUCS_le
							    (ses->
							     serverDomain,
3002
							     (__le16 *)
L
Linus Torvalds 已提交
3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018
							     bcc_ptr, len,
							     nls_codepage);
							bcc_ptr +=
							    2 * (len + 1);
							ses->
							    serverDomain[2
									 * len]
							    = 0;
							ses->
							    serverDomain[1
									 +
									 (2
									  *
									  len)]
							    = 0;
						} /* else no more room so create dummy domain string */
3019 3020 3021
						else {
							if(ses->serverDomain)
								kfree(ses->serverDomain);
3022
							ses->serverDomain = kzalloc(2,GFP_KERNEL);
3023
						}
L
Linus Torvalds 已提交
3024
					} else {  /* no room so create dummy domain and NOS string */
3025 3026
						if(ses->serverDomain)
							kfree(ses->serverDomain);
3027
						ses->serverDomain = kzalloc(2, GFP_KERNEL);
3028
						kfree(ses->serverNOS);
3029
						ses->serverNOS = kzalloc(2, GFP_KERNEL);
L
Linus Torvalds 已提交
3030 3031 3032 3033 3034 3035
					}
				} else {	/* ASCII */
					len = strnlen(bcc_ptr, 1024);
					if (((long) bcc_ptr + len) - 
                        (long) pByteArea(smb_buffer_response) 
                            <= BCC(smb_buffer_response)) {
3036 3037
						if(ses->serverOS)
							kfree(ses->serverOS);
3038
						ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
L
Linus Torvalds 已提交
3039 3040 3041 3042 3043 3044 3045
						strncpy(ses->serverOS,bcc_ptr, len);

						bcc_ptr += len;
						bcc_ptr[0] = 0;	/* null terminate the string */
						bcc_ptr++;

						len = strnlen(bcc_ptr, 1024);
3046
						kfree(ses->serverNOS);
3047
						ses->serverNOS = kzalloc(len+1,GFP_KERNEL);
L
Linus Torvalds 已提交
3048 3049 3050 3051 3052 3053
						strncpy(ses->serverNOS, bcc_ptr, len);	
						bcc_ptr += len;
						bcc_ptr[0] = 0;
						bcc_ptr++;

						len = strnlen(bcc_ptr, 1024);
3054 3055
						if(ses->serverDomain)
							kfree(ses->serverDomain);
3056
						ses->serverDomain = kzalloc(len+1,GFP_KERNEL);
L
Linus Torvalds 已提交
3057 3058 3059 3060 3061 3062 3063 3064 3065 3066 3067 3068 3069 3070 3071 3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087 3088 3089 3090 3091 3092 3093 3094 3095 3096 3097 3098 3099 3100 3101 3102 3103 3104 3105 3106 3107 3108 3109 3110
						strncpy(ses->serverDomain, bcc_ptr, len);
						bcc_ptr += len;
						bcc_ptr[0] = 0;
						bcc_ptr++;
					} else
						cFYI(1,
						     ("Variable field of length %d extends beyond end of smb ",
						      len));
				}
			} else {
				cERROR(1,
				       (" Security Blob Length extends beyond end of SMB"));
			}
		} else {
			cERROR(1, ("No session structure passed in."));
		}
	} else {
		cERROR(1,
		       (" Invalid Word count %d: ",
			smb_buffer_response->WordCount));
		rc = -EIO;
	}

	if (smb_buffer)
		cifs_buf_release(smb_buffer);

	return rc;
}

int
CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
	 const char *tree, struct cifsTconInfo *tcon,
	 const struct nls_table *nls_codepage)
{
	struct smb_hdr *smb_buffer;
	struct smb_hdr *smb_buffer_response;
	TCONX_REQ *pSMB;
	TCONX_RSP *pSMBr;
	unsigned char *bcc_ptr;
	int rc = 0;
	int length;
	__u16 count;

	if (ses == NULL)
		return -EIO;

	smb_buffer = cifs_buf_get();
	if (smb_buffer == NULL) {
		return -ENOMEM;
	}
	smb_buffer_response = smb_buffer;

	header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
			NULL /*no tid */ , 4 /*wct */ );
3111 3112

	smb_buffer->Mid = GetNextMid(ses->server);
L
Linus Torvalds 已提交
3113 3114 3115 3116 3117 3118 3119
	smb_buffer->Uid = ses->Suid;
	pSMB = (TCONX_REQ *) smb_buffer;
	pSMBr = (TCONX_RSP *) smb_buffer_response;

	pSMB->AndXCommand = 0xFF;
	pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
	bcc_ptr = &pSMB->Password[0];
3120 3121
	if((ses->server->secMode) & SECMODE_USER) {
		pSMB->PasswordLength = cpu_to_le16(1);	/* minimum */
3122
		*bcc_ptr = 0; /* password is null byte */
3123
		bcc_ptr++;              /* skip password */
3124
		/* already aligned so no need to do it below */
3125
	} else {
3126
		pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
3127 3128 3129
		/* BB FIXME add code to fail this if NTLMv2 or Kerberos
		   specified as required (when that support is added to
		   the vfs in the future) as only NTLM or the much
3130
		   weaker LANMAN (which we do not send by default) is accepted
3131 3132
		   by Samba (not sure whether other servers allow
		   NTLMv2 password here) */
3133 3134 3135 3136 3137 3138
#ifdef CONFIG_CIFS_WEAK_PW_HASH
		if((extended_security & CIFSSEC_MAY_LANMAN) && 
			(ses->server->secType == LANMAN))
			calc_lanman_hash(ses, bcc_ptr);
		else
#endif /* CIFS_WEAK_PW_HASH */
3139 3140 3141 3142
		SMBNTencrypt(ses->password,
			     ses->server->cryptKey,
			     bcc_ptr);

3143 3144 3145 3146 3147 3148
		bcc_ptr += CIFS_SESS_KEY_SIZE;
		if(ses->capabilities & CAP_UNICODE) {
			/* must align unicode strings */
			*bcc_ptr = 0; /* null byte password */
			bcc_ptr++;
		}
3149
	}
L
Linus Torvalds 已提交
3150

3151 3152
	if(ses->server->secMode & 
			(SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
L
Linus Torvalds 已提交
3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163
		smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;

	if (ses->capabilities & CAP_STATUS32) {
		smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS;
	}
	if (ses->capabilities & CAP_DFS) {
		smb_buffer->Flags2 |= SMBFLG2_DFS;
	}
	if (ses->capabilities & CAP_UNICODE) {
		smb_buffer->Flags2 |= SMBFLG2_UNICODE;
		length =
3164 3165 3166 3167
		    cifs_strtoUCS((__le16 *) bcc_ptr, tree, 
			6 /* max utf8 char length in bytes */ * 
			(/* server len*/ + 256 /* share len */), nls_codepage);
		bcc_ptr += 2 * length;	/* convert num 16 bit words to bytes */
L
Linus Torvalds 已提交
3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179 3180 3181 3182 3183 3184 3185 3186 3187 3188 3189 3190 3191 3192 3193 3194 3195 3196
		bcc_ptr += 2;	/* skip trailing null */
	} else {		/* ASCII */
		strcpy(bcc_ptr, tree);
		bcc_ptr += strlen(tree) + 1;
	}
	strcpy(bcc_ptr, "?????");
	bcc_ptr += strlen("?????");
	bcc_ptr += 1;
	count = bcc_ptr - &pSMB->Password[0];
	pSMB->hdr.smb_buf_length += count;
	pSMB->ByteCount = cpu_to_le16(count);

	rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, 0);

	/* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
	/* above now done in SendReceive */
	if ((rc == 0) && (tcon != NULL)) {
		tcon->tidStatus = CifsGood;
		tcon->tid = smb_buffer_response->Tid;
		bcc_ptr = pByteArea(smb_buffer_response);
		length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
        /* skip service field (NB: this field is always ASCII) */
		bcc_ptr += length + 1;	
		strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
		if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
			length = UniStrnlen((wchar_t *) bcc_ptr, 512);
			if ((bcc_ptr + (2 * length)) -
			     pByteArea(smb_buffer_response) <=
			    BCC(smb_buffer_response)) {
J
Jesper Juhl 已提交
3197
				kfree(tcon->nativeFileSystem);
L
Linus Torvalds 已提交
3198
				tcon->nativeFileSystem =
3199
				    kzalloc(length + 2, GFP_KERNEL);
L
Linus Torvalds 已提交
3200
				cifs_strfromUCS_le(tcon->nativeFileSystem,
3201
						   (__le16 *) bcc_ptr,
L
Linus Torvalds 已提交
3202 3203 3204 3205 3206 3207 3208 3209 3210 3211 3212 3213
						   length, nls_codepage);
				bcc_ptr += 2 * length;
				bcc_ptr[0] = 0;	/* null terminate the string */
				bcc_ptr[1] = 0;
				bcc_ptr += 2;
			}
			/* else do not bother copying these informational fields */
		} else {
			length = strnlen(bcc_ptr, 1024);
			if ((bcc_ptr + length) -
			    pByteArea(smb_buffer_response) <=
			    BCC(smb_buffer_response)) {
J
Jesper Juhl 已提交
3214
				kfree(tcon->nativeFileSystem);
L
Linus Torvalds 已提交
3215
				tcon->nativeFileSystem =
3216
				    kzalloc(length + 1, GFP_KERNEL);
L
Linus Torvalds 已提交
3217 3218 3219 3220 3221
				strncpy(tcon->nativeFileSystem, bcc_ptr,
					length);
			}
			/* else do not bother copying these informational fields */
		}
3222 3223 3224 3225
		if(smb_buffer_response->WordCount == 3)
			tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
		else
			tcon->Flags = 0;
L
Linus Torvalds 已提交
3226 3227 3228 3229 3230 3231 3232 3233 3234 3235 3236 3237 3238 3239 3240 3241 3242 3243
		cFYI(1, ("Tcon flags: 0x%x ", tcon->Flags));
	} else if ((rc == 0) && tcon == NULL) {
        /* all we need to save for IPC$ connection */
		ses->ipc_tid = smb_buffer_response->Tid;
	}

	if (smb_buffer)
		cifs_buf_release(smb_buffer);
	return rc;
}

int
cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
{
	int rc = 0;
	int xid;
	struct cifsSesInfo *ses = NULL;
	struct task_struct *cifsd_task;
3244
	char * tmp;
L
Linus Torvalds 已提交
3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265

	xid = GetXid();

	if (cifs_sb->tcon) {
		ses = cifs_sb->tcon->ses; /* save ptr to ses before delete tcon!*/
		rc = CIFSSMBTDis(xid, cifs_sb->tcon);
		if (rc == -EBUSY) {
			FreeXid(xid);
			return 0;
		}
		tconInfoFree(cifs_sb->tcon);
		if ((ses) && (ses->server)) {
			/* save off task so we do not refer to ses later */
			cifsd_task = ses->server->tsk;
			cFYI(1, ("About to do SMBLogoff "));
			rc = CIFSSMBLogoff(xid, ses);
			if (rc == -EBUSY) {
				FreeXid(xid);
				return 0;
			} else if (rc == -ESHUTDOWN) {
				cFYI(1,("Waking up socket by sending it signal"));
3266
				if(cifsd_task) {
L
Linus Torvalds 已提交
3267
					send_sig(SIGKILL,cifsd_task,1);
3268 3269
					wait_for_completion(&cifsd_complete);
				}
L
Linus Torvalds 已提交
3270 3271 3272 3273 3274 3275 3276 3277
				rc = 0;
			} /* else - we have an smb session
				left on this socket do not kill cifsd */
		} else
			cFYI(1, ("No session or bad tcon"));
	}
	
	cifs_sb->tcon = NULL;
3278 3279 3280 3281
	tmp = cifs_sb->prepath;
	cifs_sb->prepathlen = 0;
	cifs_sb->prepath = NULL;
	kfree(tmp);
3282 3283
	if (ses)
		schedule_timeout_interruptible(msecs_to_jiffies(500));
L
Linus Torvalds 已提交
3284 3285 3286 3287 3288 3289 3290 3291 3292 3293 3294
	if (ses)
		sesInfoFree(ses);

	FreeXid(xid);
	return rc;		/* BB check if we should always return zero here */
} 

int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
					   struct nls_table * nls_info)
{
	int rc = 0;
3295
	char ntlm_session_key[CIFS_SESS_KEY_SIZE];
L
Linus Torvalds 已提交
3296
	int ntlmv2_flag = FALSE;
3297
	int first_time = 0;
L
Linus Torvalds 已提交
3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314 3315

	/* what if server changes its buffer size after dropping the session? */
	if(pSesInfo->server->maxBuf == 0) /* no need to send on reconnect */ {
		rc = CIFSSMBNegotiate(xid, pSesInfo);
		if(rc == -EAGAIN) /* retry only once on 1st time connection */ {
			rc = CIFSSMBNegotiate(xid, pSesInfo);
			if(rc == -EAGAIN) 
				rc = -EHOSTDOWN;
		}
		if(rc == 0) {
			spin_lock(&GlobalMid_Lock);
			if(pSesInfo->server->tcpStatus != CifsExiting)
				pSesInfo->server->tcpStatus = CifsGood;
			else
				rc = -EHOSTDOWN;
			spin_unlock(&GlobalMid_Lock);

		}
3316
		first_time = 1;
L
Linus Torvalds 已提交
3317 3318 3319 3320 3321
	}
	if (!rc) {
		pSesInfo->capabilities = pSesInfo->server->capabilities;
		if(linuxExtEnabled == 0)
			pSesInfo->capabilities &= (~CAP_UNIX);
3322
	/*	pSesInfo->sequence_number = 0;*/
3323
		cFYI(1,("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
L
Linus Torvalds 已提交
3324 3325
			pSesInfo->server->secMode,
			pSesInfo->server->capabilities,
3326
			pSesInfo->server->timeAdj));
3327
		if(experimEnabled < 2)
3328 3329
			rc = CIFS_SessSetup(xid, pSesInfo,
					    first_time, nls_info);
3330
		else if (extended_security
3331 3332
				&& (pSesInfo->capabilities 
					& CAP_EXTENDED_SECURITY)
L
Linus Torvalds 已提交
3333
				&& (pSesInfo->server->secType == NTLMSSP)) {
3334
			rc = -EOPNOTSUPP;
L
Linus Torvalds 已提交
3335 3336 3337
		} else if (extended_security
			   && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
			   && (pSesInfo->server->secType == RawNTLMSSP)) {
3338
			cFYI(1, ("NTLMSSP sesssetup"));
L
Linus Torvalds 已提交
3339 3340 3341 3342 3343 3344 3345
			rc = CIFSNTLMSSPNegotiateSessSetup(xid,
						pSesInfo,
						&ntlmv2_flag,
						nls_info);
			if (!rc) {
				if(ntlmv2_flag) {
					char * v2_response;
3346
					cFYI(1,("more secure NTLM ver2 hash"));
L
Linus Torvalds 已提交
3347 3348 3349 3350 3351 3352 3353 3354
					if(CalcNTLMv2_partial_mac_key(pSesInfo, 
						nls_info)) {
						rc = -ENOMEM;
						goto ss_err_exit;
					} else
						v2_response = kmalloc(16 + 64 /* blob */, GFP_KERNEL);
					if(v2_response) {
						CalcNTLMv2_response(pSesInfo,v2_response);
3355 3356 3357 3358
				/*		if(first_time)
							cifs_calculate_ntlmv2_mac_key(
							  pSesInfo->server->mac_signing_key, 
							  response, ntlm_session_key, */
L
Linus Torvalds 已提交
3359 3360 3361 3362 3363 3364 3365 3366 3367 3368 3369 3370
						kfree(v2_response);
					/* BB Put dummy sig in SessSetup PDU? */
					} else {
						rc = -ENOMEM;
						goto ss_err_exit;
					}

				} else {
					SMBNTencrypt(pSesInfo->password,
						pSesInfo->server->cryptKey,
						ntlm_session_key);

3371 3372 3373 3374 3375
					if(first_time)
						cifs_calculate_mac_key(
							pSesInfo->server->mac_signing_key,
							ntlm_session_key,
							pSesInfo->password);
L
Linus Torvalds 已提交
3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386 3387 3388 3389 3390
				}
			/* for better security the weaker lanman hash not sent
			   in AuthSessSetup so we no longer calculate it */

				rc = CIFSNTLMSSPAuthSessSetup(xid,
					pSesInfo,
					ntlm_session_key,
					ntlmv2_flag,
					nls_info);
			}
		} else { /* old style NTLM 0.12 session setup */
			SMBNTencrypt(pSesInfo->password,
				pSesInfo->server->cryptKey,
				ntlm_session_key);

3391 3392 3393 3394 3395
			if(first_time) 		
				cifs_calculate_mac_key(
					pSesInfo->server->mac_signing_key,
					ntlm_session_key, pSesInfo->password);

L
Linus Torvalds 已提交
3396 3397 3398 3399 3400 3401 3402 3403 3404 3405 3406 3407 3408 3409
			rc = CIFSSessSetup(xid, pSesInfo,
				ntlm_session_key, nls_info);
		}
		if (rc) {
			cERROR(1,("Send error in SessSetup = %d",rc));
		} else {
			cFYI(1,("CIFS Session Established successfully"));
			pSesInfo->status = CifsGood;
		}
	}
ss_err_exit:
	return rc;
}