fs/cifs/connect.c

/*
 *   fs/cifs/connect.c
 *
 *   Copyright (C) International Business Machines  Corp., 2002,2004
 *   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>
#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"

#define CIFS_PORT 445
#define RFC1001_PORT 139

extern void SMBencrypt(unsigned char *passwd, unsigned char *c8,
		       unsigned char *p24);
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 */
	uid_t linux_uid;
	gid_t linux_gid;
	mode_t file_mode;
	mode_t dir_mode;
	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 */
	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;
	unsigned remap:1;   /* set to remap seven reserved chars in filenames */
	unsigned int rsize;
	unsigned int wsize;
	unsigned int sockopt;
	unsigned short int port;
};

static int ipv4_connect(struct sockaddr_in *psin_server, 
			struct socket **csocket,
			char * netb_name);
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)
	 */

int
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;

	cFYI(1, ("Reconnecting tcp session "));

	/* 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) {
				/* 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 */
				mid_entry->midState = MID_RETRY_NEEDED;
			}
		}
	}
	spin_unlock(&GlobalMid_Lock);
	up(&server->tcpSem); 

	while ((server->tcpStatus != CifsExiting) && (server->tcpStatus != CifsGood))
	{
		if(server->protocolType == IPV6) {
			rc = ipv6_connect(&server->addr.sockAddr6,&server->ssocket);
		} else {
			rc = ipv4_connect(&server->addr.sockAddr, 
					&server->ssocket,
					server->workstation_RFC1001_name);
		}
		if(rc) {
			set_current_state(TASK_INTERRUPTIBLE);
			schedule_timeout(3 * HZ);
		} else {
			atomic_inc(&tcpSesReconnectCount);
			spin_lock(&GlobalMid_Lock);
			if(server->tcpStatus != CifsExiting)
				server->tcpStatus = CifsGood;
			server->sequence_number = 0;
			spin_unlock(&GlobalMid_Lock);			
	/*		atomic_set(&server->inFlight,0);*/
			wake_up(&server->response_q);
		}
	}
	return rc;
}

static int
cifs_demultiplex_thread(struct TCP_Server_Info *server)
{
	int length;
	unsigned int pdu_length, total_read;
	struct smb_hdr *smb_buffer = NULL;
	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;
	char *temp;

	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);
	if(length  > 1) {
		mempool_resize(cifs_req_poolp,
			length + cifs_min_rcv,
			GFP_KERNEL);
	}

	while (server->tcpStatus != CifsExiting) {
		if (smb_buffer == NULL)
			smb_buffer = cifs_buf_get();
		else
			memset(smb_buffer, 0, sizeof (struct smb_hdr));

		if (smb_buffer == NULL) {
			cERROR(1,("Can not get memory for SMB response"));
			set_current_state(TASK_INTERRUPTIBLE);
			schedule_timeout(HZ * 3); /* give system time to free memory */
			continue;
		}
		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 */);

		if(server->tcpStatus == CifsExiting) {
			break;
		} else if (server->tcpStatus == CifsNeedReconnect) {
			cFYI(1,("Reconnecting after server stopped responding"));
			cifs_reconnect(server);
			cFYI(1,("call to reconnect done"));
			csocket = server->ssocket;
			continue;
		} else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
			set_current_state(TASK_INTERRUPTIBLE);
			schedule_timeout(1); /* minimum sleep to prevent looping
				allowing socket to clear and app threads to set
				tcpStatus CifsNeedReconnect if server hung */
			continue;
		} else if (length <= 0) {
			if(server->tcpStatus == CifsNew) {
				cFYI(1,("tcp session abended prematurely (after SMBnegprot)"));
				/* some servers kill tcp session rather than returning
					smb negprot error in which case reconnecting here is
					not going to help - return error to mount */
				break;
			}
			if(length == -EINTR) { 
				cFYI(1,("cifsd thread killed"));
				break;
			}
			cFYI(1,("Reconnecting after unexpected peek error %d",length));
			cifs_reconnect(server);
			csocket = server->ssocket;
			wake_up(&server->response_q);
			continue;
		} else if (length > 3) {
			pdu_length = ntohl(smb_buffer->smb_buf_length);
		/* Only read pdu_length after below checks for too short (due
		   to e.g. int overflow) and too long ie beyond end of buf */
			cFYI(1,("rfc1002 length(big endian)0x%x)", pdu_length+4));

			temp = (char *) smb_buffer;
			if (temp[0] == (char) RFC1002_SESSION_KEEP_ALIVE) {
				cFYI(0,("Received 4 byte keep alive packet"));
			} else if (temp[0] == (char) RFC1002_POSITIVE_SESSION_RESPONSE) {
					cFYI(1,("Good RFC 1002 session rsp"));
			} else if (temp[0] == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
				/* we get this from Windows 98 instead of error on SMB negprot response */
				cFYI(1,("Negative RFC 1002 Session Response Error 0x%x)",temp[4]));
				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 */
					set_current_state(TASK_INTERRUPTIBLE);
					schedule_timeout(HZ);
					/* 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);
					cifs_reconnect(server);
					csocket = server->ssocket;
					wake_up(&server->response_q);
					continue;
				}
			} else if (temp[0] != (char) 0) {
				cERROR(1,("Unknown RFC 1002 frame"));
				cifs_dump_mem(" Received Data: ", temp, length);
				cifs_reconnect(server);
				csocket = server->ssocket;
				continue;
			} else {
				if((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4)
				    || (pdu_length < sizeof (struct smb_hdr) - 1 - 4)) {
					cERROR(1,
					    ("Invalid size SMB length %d and pdu_length %d",
						length, pdu_length+4));
					cifs_reconnect(server);
					csocket = server->ssocket;
					wake_up(&server->response_q);
					continue;
				} else { /* length ok */
					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 (length == 0) {
							cERROR(1,
							       ("Zero length receive when expecting %d ",
								pdu_length - total_read));
							cifs_reconnect(server);
							csocket = server->ssocket;
							wake_up(&server->response_q);
							continue;
						}
					}
					length += 4; /* account for rfc1002 hdr */
				}

				dump_smb(smb_buffer, length);
				if (checkSMB
				    (smb_buffer, smb_buffer->Mid, total_read+4)) {
					cERROR(1, ("Bad SMB Received "));
					continue;
				}

				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)) {
						cFYI(1,
						     (" Mid 0x%x matched - waking up ",mid_entry->mid));
						task_to_wake = mid_entry->tsk;
						mid_entry->resp_buf =
						    smb_buffer;
						mid_entry->midState =
						    MID_RESPONSE_RECEIVED;
					}
				}
				spin_unlock(&GlobalMid_Lock);
				if (task_to_wake) {
					smb_buffer = NULL;	/* will be freed by users thread after he is done */
					wake_up_process(task_to_wake);
				} else if (is_valid_oplock_break(smb_buffer) == FALSE) {                          
					cERROR(1, ("No task to wake, unknown frame rcvd!"));
					cifs_dump_mem("Received Data is: ",temp,sizeof(struct smb_hdr));
				}
			}
		} else {
			cFYI(1,
			    ("Frame less than four bytes received  %d bytes long.",
			      length));
			cifs_reconnect(server);
			csocket = server->ssocket;
			wake_up(&server->response_q);
			continue;
		}
	}
	spin_lock(&GlobalMid_Lock);
	server->tcpStatus = CifsExiting;
	server->tsk = NULL;
	atomic_set(&server->inFlight, 0);
	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
	that may haven been blocked when more than 50 at time were on the wire 
	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 */
	set_current_state(TASK_INTERRUPTIBLE);
	schedule_timeout(HZ/8);

	if(server->ssocket) {
		sock_release(csocket);
		server->ssocket = NULL;
	}
	if (smb_buffer) /* buffer usually freed in free_mid - need to free it on error or exit */
		cifs_buf_release(smb_buffer);

	read_lock(&GlobalSMBSeslock);
	if (list_empty(&server->pending_mid_q)) {
		/* loop through server session structures attached to this and mark them dead */
		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 {
		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,
					 (" Clearing Mid 0x%x - waking up ",mid_entry->mid));
				task_to_wake = mid_entry->tsk;
				if(task_to_wake) {
					wake_up_process(task_to_wake);
				}
			}
		}
		spin_unlock(&GlobalMid_Lock);
		read_unlock(&GlobalSMBSeslock);
		set_current_state(TASK_INTERRUPTIBLE);
		/* 1/8th of sec is more than enough time for them to exit */
		schedule_timeout(HZ/8); 
	}

	if (list_empty(&server->pending_mid_q)) {
		/* mpx threads have not exited yet give them 
		at least the smb send timeout time for long ops */
		cFYI(1, ("Wait for exit from demultiplex thread"));
		set_current_state(TASK_INTERRUPTIBLE);
		schedule_timeout(46 * HZ);	
		/* if threads still have not exited they are probably never
		coming home not much else we can do but free the memory */
	}
	kfree(server);

	write_lock(&GlobalSMBSeslock);
	atomic_dec(&tcpSesAllocCount);
	length = tcpSesAllocCount.counter;
	write_unlock(&GlobalSMBSeslock);
	if(length  > 0) {
		mempool_resize(cifs_req_poolp,
			length + cifs_min_rcv,
			GFP_KERNEL);
	}

	set_current_state(TASK_INTERRUPTIBLE);
	schedule_timeout(HZ/4);
	return 0;
}

static void * 
cifs_kcalloc(size_t size, unsigned int __nocast type)
{
	void *addr;
	addr = kmalloc(size, type);
	if (addr)
		memset(addr, 0, size);
	return addr;
}

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; 

	memset(vol->source_rfc1001_name,0x20,15);
	for(i=0;i < strnlen(system_utsname.nodename,15);i++) {
		/* does not have to be a perfect mapping since the 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]);
	}
	vol->source_rfc1001_name[15] = 0;

	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;

	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 */

			if ((value[temp_len] == 0) && (value[temp_len+1] == separator[0])) {
				/* 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]) {
						if (value[temp_len+1] == separator[0]) {
							temp_len++; /* skip second comma */
						} 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 */
				vol->password = cifs_kcalloc(temp_len, GFP_KERNEL);
				for(i=0,j=0;i<temp_len;i++,j++) {
					vol->password[j] = value[i];
					if(value[i] == separator[0] && value[i+1] == separator[0]) {
						/* skip second comma */
						i++;
					}
				}
				vol->password[j] = 0;
			} else {
				vol->password = cifs_kcalloc(temp_len + 1, GFP_KERNEL);
				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;
			}
		} 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? */
			if (strnlen(value, 65) < 65) {
				vol->domainname = value;
				cFYI(1, ("Domain name set"));
			} else {
				printk(KERN_WARNING "CIFS: domain name too long\n");
				return 1;
			}
		} 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))
					printk(KERN_WARNING "CIFS: netbiosname longer than 15 and was truncated.\n");
			}
		} 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;
		} else if (strnicmp(data, "mapchars", 8) == 0) {
			vol->remap = 1;
		} else if (strnicmp(data, "nomapchars", 10) == 0) {
			vol->remap = 0;
		} 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;
		} else if (strnicmp(data, "acl",3) == 0) {
			vol->no_psx_acl = 0;
		} else if (strnicmp(data, "noacl",5) == 0) {
			vol->no_psx_acl = 1;
		} 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) {
		cFYI(1, ("Next tcon - "));
		tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
		if (tcon->ses) {
			if (tcon->ses->server) {
				cFYI(1,
				     (" old ip addr: %x == new ip %x ?",
				      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) {
	/* BB lock tcon and server and tcp session and increment use count here? */
					/* found a match on the TCP session */
					/* BB check if reconnection needed */
					cFYI(1,("Matched ip, old UNC: %s == new: %s ?",
					      tcon->treeName, uncName));
					if (strncmp
					    (tcon->treeName, uncName,
					     MAX_TREE_SIZE) == 0) {
						cFYI(1,
						     ("Matched UNC, old user: %s == new: %s ?",
						      tcon->treeName, uncName));
						if (strncmp
						    (tcon->ses->userName,
						     userName,
						     MAX_USERNAME_SIZE) == 0) {
							read_unlock(&GlobalSMBSeslock);
							return tcon;/* also matched user (smb session)*/
						}
					}
				}
			}
		}
	}
	read_unlock(&GlobalSMBSeslock);
	return NULL;
}

int
connect_to_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
		    const char *old_path, const struct nls_table *nls_codepage,
		    int remap)
{
	unsigned char *referrals = NULL;
	unsigned int num_referrals;
	int rc = 0;

	rc = get_dfs_path(xid, pSesInfo,old_path, nls_codepage, 
			&num_referrals, &referrals, remap);

	/* 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 */

	if(referrals)
		kfree(referrals);

	return rc;
}

int
get_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
			const char *old_path, const struct nls_table *nls_codepage, 
			unsigned int *pnum_referrals, 
			unsigned char ** preferrals, int remap)
{
	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,
				     pnum_referrals, nls_codepage, remap);

	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, 
			 char * netbios_name)
{
	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 */
	(*csocket)->sk->sk_rcvtimeo = 7 * HZ;

	/* 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;
		ses_init_buf = cifs_kcalloc(sizeof(struct rfc1002_session_packet), GFP_KERNEL);
		if(ses_init_buf) {
			ses_init_buf->trailer.session_req.called_len = 32;
			rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
				DEFAULT_CIFS_CALLED_NAME,16);
			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);
		}
		/* 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)) {
		if(volume_info.UNC)
			kfree(volume_info.UNC);
		if(volume_info.password)
			kfree(volume_info.password);
		FreeXid(xid);
		return -EINVAL;
	}

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

	} else {
		cifserror("No username specified ");
        /* In userspace mount helper we can get user name from alternate
           locations such as env variables and files on disk */
		if(volume_info.UNC)
			kfree(volume_info.UNC);
		if(volume_info.password)
			kfree(volume_info.password);
		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 */
			if(volume_info.UNC)
				kfree(volume_info.UNC);
			if(volume_info.password)
				kfree(volume_info.password);
			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"));
		if(volume_info.UNC)
			kfree(volume_info.UNC);
		if(volume_info.password)
			kfree(volume_info.password);
		FreeXid(xid);
		return -EINVAL;
	} else /* which servers DFS root would we conect to */ {
		cERROR(1,
		       ("CIFS mount error: No UNC path (e.g. -o unc=//192.168.1.100/public) specified  "));
		if(volume_info.UNC)
			kfree(volume_info.UNC);
		if(volume_info.password)
			kfree(volume_info.password);
		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));
			if(volume_info.UNC)
				kfree(volume_info.UNC);
			if(volume_info.password)
				kfree(volume_info.password);
			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 {
		if(volume_info.UNC)
			kfree(volume_info.UNC);
		if(volume_info.password)
			kfree(volume_info.password);
		FreeXid(xid);
		return -EINVAL;
	}


	if (srvTcp) {
		cFYI(1, ("Existing tcp session with server found "));                
	} else {	/* create socket */
		if(volume_info.port)
			sin_server.sin_port = htons(volume_info.port);
		else
			sin_server.sin_port = 0;
		rc = ipv4_connect(&sin_server,&csocket,volume_info.source_rfc1001_name);
		if (rc < 0) {
			cERROR(1,
			       ("Error connecting to IPv4 socket. Aborting operation"));
			if(csocket != NULL)
				sock_release(csocket);
			if(volume_info.UNC)
				kfree(volume_info.UNC);
			if(volume_info.password)
				kfree(volume_info.password);
			FreeXid(xid);
			return rc;
		}

		srvTcp = kmalloc(sizeof (struct TCP_Server_Info), GFP_KERNEL);
		if (srvTcp == NULL) {
			rc = -ENOMEM;
			sock_release(csocket);
			if(volume_info.UNC)
				kfree(volume_info.UNC);
			if(volume_info.password)
				kfree(volume_info.password);
			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);
				if(volume_info.UNC)
					kfree(volume_info.UNC);
				if(volume_info.password)
					kfree(volume_info.password);
				FreeXid(xid);
				return rc;
			} else
				rc = 0;
			memcpy(srvTcp->workstation_RFC1001_name, volume_info.source_rfc1001_name,16);
			srvTcp->sequence_number = 0;
		}
	}

	if (existingCifsSes) {
		pSesInfo = existingCifsSes;
		cFYI(1, ("Existing smb sess found "));
		if(volume_info.password)
			kfree(volume_info.password);
		/* volume_info.UNC freed at end of function */
	} else if (!rc) {
		cFYI(1, ("Existing smb sess not found "));
		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);
			if (volume_info.domainname)
				strncpy(pSesInfo->domainName,
					volume_info.domainname,MAX_USERNAME_SIZE);
			pSesInfo->linux_uid = volume_info.linux_uid;
			down(&pSesInfo->sesSem);
			rc = cifs_setup_session(xid,pSesInfo, cifs_sb->local_nls);
			up(&pSesInfo->sesSem);
			if(!rc)
				atomic_inc(&srvTcp->socketUseCount);
		} else
			if(volume_info.password)
				kfree(volume_info.password);
	}
    
	/* search for existing tcon to this server share */
	if (!rc) {
		if((volume_info.rsize) && (volume_info.rsize <= CIFSMaxBufSize))
			cifs_sb->rsize = volume_info.rsize;
		else
			cifs_sb->rsize = srvTcp->maxBuf - MAX_CIFS_HDR_SIZE; /* default */
		if((volume_info.wsize) && (volume_info.wsize <= CIFSMaxBufSize))
			cifs_sb->wsize = volume_info.wsize;
		else
			cifs_sb->wsize = CIFSMaxBufSize; /* default */
		if(cifs_sb->rsize < PAGE_CACHE_SIZE) {
			cifs_sb->rsize = PAGE_CACHE_SIZE;
			cERROR(1,("Attempt to set readsize for mount to less than one page (4096)"));
		}
		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;
		cFYI(1,("file mode: 0x%x  dir mode: 0x%x",cifs_sb->mnt_file_mode,cifs_sb->mnt_dir_mode));

		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;
		if(volume_info.remap)
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
		if(volume_info.no_xattr)
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
		if(volume_info.direct_io) {
			cERROR(1,("mounting share using direct i/o"));
			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) {
			cFYI(1, ("Found match on UNC path "));
			/* 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;
		} 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)) {
					rc = connect_to_dfs_path(xid, pSesInfo,
							"", cifs_sb->local_nls,
							cifs_sb->mnt_cifs_flags & 
							  CIFS_MOUNT_MAP_SPECIAL_CHR);
					if(volume_info.UNC)
						kfree(volume_info.UNC);
					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;
				}
			}
		}
	}
	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);
			if(srvTcp->tsk)
				send_sig(SIGKILL,srvTcp->tsk,1);
		}
		 /* 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) &&
					   (pSesInfo->server->tsk))
						send_sig(SIGKILL,pSesInfo->server->tsk,1);
				} else
					cFYI(1, ("No session or bad tcon"));
				sesInfoFree(pSesInfo);
				/* pSesInfo = NULL; */
			}
		}
	} else {
		atomic_inc(&tcon->useCount);
		cifs_sb->tcon = tcon;
		tcon->ses = pSesInfo;

		/* do not care if following two calls succeed - informational only */
		CIFSSMBQFSDeviceInfo(xid, tcon);
		CIFSSMBQFSAttributeInfo(xid, tcon);
		if (tcon->ses->capabilities & CAP_UNIX) {
			if(!CIFSSMBQFSUnixInfo(xid, tcon)) {
				if(!volume_info.no_psx_acl) {
					if(CIFS_UNIX_POSIX_ACL_CAP & 
					   le64_to_cpu(tcon->fsUnixInfo.Capability))
						cFYI(1,("server negotiated posix acl support"));
						sb->s_flags |= MS_POSIXACL;
				}
			}
		}
	}

	/* 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) */
	if(volume_info.UNC)
		kfree(volume_info.UNC);
	FreeXid(xid);
	return rc;
}

static int
CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
	      char session_key[CIFS_SESSION_KEY_SIZE],
	      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;

	cFYI(1, ("In sesssetup "));
	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 */ );

	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 = 
		cpu_to_le16(CIFS_SESSION_KEY_SIZE);

	pSMB->req_no_secext.CaseSensitivePasswordLength =
	    cpu_to_le16(CIFS_SESSION_KEY_SIZE);
	bcc_ptr = pByteArea(smb_buffer);
	memcpy(bcc_ptr, (char *) session_key, CIFS_SESSION_KEY_SIZE);
	bcc_ptr += CIFS_SESSION_KEY_SIZE;
	memcpy(bcc_ptr, (char *) session_key, CIFS_SESSION_KEY_SIZE);
	bcc_ptr += CIFS_SESSION_KEY_SIZE;

	if (ses->capabilities & CAP_UNICODE) {
		if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
			*bcc_ptr = 0;
			bcc_ptr++;
		}
		if(user == NULL)
			bytes_returned = 0; /* skill null user */
	        else
			bytes_returned =
			        cifs_strtoUCS((wchar_t *) bcc_ptr, user, 100,
					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 =
			    cifs_strtoUCS((wchar_t *) bcc_ptr,
					  "CIFS_LINUX_DOM", 32, nls_codepage);
		else
			bytes_returned =
			    cifs_strtoUCS((wchar_t *) bcc_ptr, domain, 64,
					  nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, "Linux version ",
				  32, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, system_utsname.release,
				  32, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, CIFS_NETWORK_OPSYS,
				  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  */
				ses->serverOS = cifs_kcalloc(2 * (len + 1), GFP_KERNEL);
				cifs_strfromUCS_le(ses->serverOS,
					   (wchar_t *)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);
					ses->serverNOS =cifs_kcalloc(2 * (len + 1),GFP_KERNEL);
					cifs_strfromUCS_le(ses->serverNOS,
							   (wchar_t *)bcc_ptr,len,nls_codepage);
					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) {
						len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);	
          /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
						ses->serverDomain =
						    cifs_kcalloc(2*(len+1),GFP_KERNEL);
						cifs_strfromUCS_le(ses->serverDomain,
						     (wchar_t *)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 */
					else
						ses->serverDomain =
						    cifs_kcalloc(2,
							    GFP_KERNEL);
				} else {	/* no room so create dummy domain and NOS string */
					ses->serverDomain =
					    cifs_kcalloc(2, GFP_KERNEL);
					ses->serverNOS =
					    cifs_kcalloc(2, GFP_KERNEL);
				}
			} else {	/* ASCII */
				len = strnlen(bcc_ptr, 1024);
				if (((long) bcc_ptr + len) - (long)
				    pByteArea(smb_buffer_response)
					    <= BCC(smb_buffer_response)) {
					ses->serverOS = cifs_kcalloc(len + 1,GFP_KERNEL);
					strncpy(ses->serverOS,bcc_ptr, len);

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

					len = strnlen(bcc_ptr, 1024);
					ses->serverNOS = cifs_kcalloc(len + 1,GFP_KERNEL);
					strncpy(ses->serverNOS, bcc_ptr, len);
					bcc_ptr += len;
					bcc_ptr[0] = 0;
					bcc_ptr++;

					len = strnlen(bcc_ptr, 1024);
					ses->serverDomain = cifs_kcalloc(len + 1,GFP_KERNEL);
					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;
	}
	
	if (smb_buffer)
		cifs_buf_release(smb_buffer);

	return rc;
}

static int
CIFSSpnegoSessSetup(unsigned int xid, struct cifsSesInfo *ses,
		char *SecurityBlob,int SecurityBlobLength,
		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;

	cFYI(1, ("In spnego sesssetup "));
	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 */ , 12 /* wct */ );
	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);

	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);

	pSMB->req.SecurityBlobLength = cpu_to_le16(SecurityBlobLength);
	bcc_ptr = pByteArea(smb_buffer);
	memcpy(bcc_ptr, SecurityBlob, SecurityBlobLength);
	bcc_ptr += SecurityBlobLength;

	if (ses->capabilities & CAP_UNICODE) {
		if ((long) bcc_ptr % 2) {	/* must be word aligned for Unicode strings */
			*bcc_ptr = 0;
			bcc_ptr++;
		}
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, user, 100, nls_codepage);
		bcc_ptr += 2 * bytes_returned;	/* convert num of 16 bit words to bytes */
		bcc_ptr += 2;	/* trailing null */
		if (domain == NULL)
			bytes_returned =
			    cifs_strtoUCS((wchar_t *) bcc_ptr,
					  "CIFS_LINUX_DOM", 32, nls_codepage);
		else
			bytes_returned =
			    cifs_strtoUCS((wchar_t *) bcc_ptr, domain, 64,
					  nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, "Linux version ",
				  32, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, system_utsname.release, 32,
				  nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, CIFS_NETWORK_OPSYS,
				  64, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;
	} else {
		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.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 (ses) {
			ses->Suid = smb_buffer_response->Uid;	/* UID left in wire format (le) */
			cFYI(1, ("UID = %d ", ses->Suid));
			bcc_ptr = pByteArea(smb_buffer_response);	/* response can have either 3 or 4 word count - Samba sends 3 */

			/* BB Fix below to make endian neutral !! */

			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));
				}

				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  */
					ses->serverOS =
					    cifs_kcalloc(2 * (len + 1), GFP_KERNEL);
					cifs_strfromUCS_le(ses->serverOS,
							   (wchar_t *)
							   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);
						ses->serverNOS =
						    cifs_kcalloc(2 * (len + 1),
							    GFP_KERNEL);
						cifs_strfromUCS_le(ses->serverNOS,
								   (wchar_t *)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) */
							ses->serverDomain = cifs_kcalloc(2*(len+1),GFP_KERNEL);
							cifs_strfromUCS_le(ses->serverDomain,
							     (wchar_t *)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 */
						else
							ses->serverDomain =
							    cifs_kcalloc(2,GFP_KERNEL);
					} else {	/* no room so create dummy domain and NOS string */
						ses->serverDomain = cifs_kcalloc(2, GFP_KERNEL);
						ses->serverNOS = cifs_kcalloc(2, GFP_KERNEL);
					}
				} else {	/* ASCII */

					len = strnlen(bcc_ptr, 1024);
					if (((long) bcc_ptr + len) - (long)
					    pByteArea(smb_buffer_response)
					    <= BCC(smb_buffer_response)) {
						ses->serverOS = cifs_kcalloc(len + 1, GFP_KERNEL);
						strncpy(ses->serverOS, bcc_ptr, len);

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

						len = strnlen(bcc_ptr, 1024);
						ses->serverNOS = cifs_kcalloc(len + 1,GFP_KERNEL);
						strncpy(ses->serverNOS, bcc_ptr, len);
						bcc_ptr += len;
						bcc_ptr[0] = 0;
						bcc_ptr++;

						len = strnlen(bcc_ptr, 1024);
						ses->serverDomain = cifs_kcalloc(len + 1, GFP_KERNEL);
						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;
}

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;

	cFYI(1, ("In NTLMSSP sesssetup (negotiate) "));
	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 */ );
	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 |
	    NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM | 0x80000000 |
	    /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
	if(sign_CIFS_PDUs)
		negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
	if(ntlmv2_support)
		negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;
	/* setup pointers to domain name and workstation name */
	bcc_ptr += SecurityBlobLength;

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

	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((long) &SecurityBlob->
				DomainString -
				(long) &SecurityBlob->Signature);
		bcc_ptr += len;
		SecurityBlobLength += len;
		SecurityBlob->DomainName.Length =
		    cpu_to_le16(len);
	}
	if (ses->capabilities & CAP_UNICODE) {
		if ((long) bcc_ptr % 2) {
			*bcc_ptr = 0;
			bcc_ptr++;
		}

		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, "Linux version ",
				  32, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, system_utsname.release, 32,
				  nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;	/* null terminate Linux version */
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, CIFS_NETWORK_OPSYS,
				  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 */ 
			cFYI(1, ("UID = %d ", ses->Suid));
			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 Challenge rcvd "));

				memcpy(ses->server->cryptKey,
				       SecurityBlob2->Challenge,
				       CIFS_CRYPTO_KEY_SIZE);
				if(SecurityBlob2->NegotiateFlags & cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
					*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  */
					ses->serverOS =
					    cifs_kcalloc(2 * (len + 1), GFP_KERNEL);
					cifs_strfromUCS_le(ses->serverOS,
							   (wchar_t *)
							   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);
						ses->serverNOS =
						    cifs_kcalloc(2 * (len + 1),
							    GFP_KERNEL);
						cifs_strfromUCS_le(ses->
								   serverNOS,
								   (wchar_t *)
								   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) */
							ses->serverDomain =
							    cifs_kcalloc(2 *
								    (len +
								     1),
								    GFP_KERNEL);
							cifs_strfromUCS_le
							    (ses->
							     serverDomain,
							     (wchar_t *)
							     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 */
						else
							ses->serverDomain =
							    cifs_kcalloc(2,
								    GFP_KERNEL);
					} else {	/* no room so create dummy domain and NOS string */
						ses->serverDomain =
						    cifs_kcalloc(2, GFP_KERNEL);
						ses->serverNOS =
						    cifs_kcalloc(2, GFP_KERNEL);
					}
				} else {	/* ASCII */
					len = strnlen(bcc_ptr, 1024);
					if (((long) bcc_ptr + len) - (long)
					    pByteArea(smb_buffer_response)
					    <= BCC(smb_buffer_response)) {
						ses->serverOS =
						    cifs_kcalloc(len + 1,
							    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);
						ses->serverNOS =
						    cifs_kcalloc(len + 1,
							    GFP_KERNEL);
						strncpy(ses->serverNOS, bcc_ptr, len);
						bcc_ptr += len;
						bcc_ptr[0] = 0;
						bcc_ptr++;

						len = strnlen(bcc_ptr, 1024);
						ses->serverDomain =
						    cifs_kcalloc(len + 1,
							    GFP_KERNEL);
						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;
}
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 */ );
	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 =
	    cpu_to_le16(CIFS_SESSION_KEY_SIZE);
	SecurityBlob->NtChallengeResponse.MaximumLength =
	    cpu_to_le16(CIFS_SESSION_KEY_SIZE);
	memcpy(bcc_ptr, ntlm_session_key, CIFS_SESSION_KEY_SIZE);
	SecurityBlob->NtChallengeResponse.Buffer =
	    cpu_to_le32(SecurityBlobLength);
	SecurityBlobLength += CIFS_SESSION_KEY_SIZE;
	bcc_ptr += CIFS_SESSION_KEY_SIZE;

	if (ses->capabilities & CAP_UNICODE) {
		if (domain == NULL) {
			SecurityBlob->DomainName.Buffer = 0;
			SecurityBlob->DomainName.Length = 0;
			SecurityBlob->DomainName.MaximumLength = 0;
		} else {
			__u16 len =
			    cifs_strtoUCS((wchar_t *) bcc_ptr, domain, 64,
					  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 =
			    cifs_strtoUCS((wchar_t *) bcc_ptr, user, 64,
					  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);
		}

		/* SecurityBlob->WorkstationName.Length = cifs_strtoUCS((wchar_t *) bcc_ptr, "AMACHINE",64, nls_codepage);
		   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 =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, "Linux version ",
				  32, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, system_utsname.release, 32,
				  nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;	/* null term version string */
		bytes_returned =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, CIFS_NETWORK_OPSYS,
				  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  */
					ses->serverOS =
					    cifs_kcalloc(2 * (len + 1), GFP_KERNEL);
					cifs_strfromUCS_le(ses->serverOS,
							   (wchar_t *)
							   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);
						ses->serverNOS =
						    cifs_kcalloc(2 * (len + 1),
							    GFP_KERNEL);
						cifs_strfromUCS_le(ses->
								   serverNOS,
								   (wchar_t *)
								   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) */
							ses->serverDomain =
							    cifs_kcalloc(2 *
								    (len +
								     1),
								    GFP_KERNEL);
							cifs_strfromUCS_le
							    (ses->
							     serverDomain,
							     (wchar_t *)
							     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 */
						else
							ses->serverDomain = cifs_kcalloc(2,GFP_KERNEL);
					} else {  /* no room so create dummy domain and NOS string */
						ses->serverDomain = cifs_kcalloc(2, GFP_KERNEL);
						ses->serverNOS = cifs_kcalloc(2, GFP_KERNEL);
					}
				} else {	/* ASCII */
					len = strnlen(bcc_ptr, 1024);
					if (((long) bcc_ptr + len) - 
                        (long) pByteArea(smb_buffer_response) 
                            <= BCC(smb_buffer_response)) {
						ses->serverOS = cifs_kcalloc(len + 1,GFP_KERNEL);
						strncpy(ses->serverOS,bcc_ptr, len);

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

						len = strnlen(bcc_ptr, 1024);
						ses->serverNOS = cifs_kcalloc(len+1,GFP_KERNEL);
						strncpy(ses->serverNOS, bcc_ptr, len);	
						bcc_ptr += len;
						bcc_ptr[0] = 0;
						bcc_ptr++;

						len = strnlen(bcc_ptr, 1024);
						ses->serverDomain = cifs_kcalloc(len+1,GFP_KERNEL);
						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 */ );
	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);
	pSMB->PasswordLength = cpu_to_le16(1);	/* minimum */
	bcc_ptr = &pSMB->Password[0];
	bcc_ptr++;		/* skip password */

	if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
		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 =
		    cifs_strtoUCS((wchar_t *) bcc_ptr, tree, 100, nls_codepage);
		bcc_ptr += 2 * length;	/* convert num of 16 bit words to bytes */
		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)) {
				if(tcon->nativeFileSystem)
					kfree(tcon->nativeFileSystem);
				tcon->nativeFileSystem =
				    cifs_kcalloc(length + 2, GFP_KERNEL);
				cifs_strfromUCS_le(tcon->nativeFileSystem,
						   (wchar_t *) bcc_ptr,
						   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)) {
				if(tcon->nativeFileSystem)
					kfree(tcon->nativeFileSystem);
				tcon->nativeFileSystem =
				    cifs_kcalloc(length + 1, GFP_KERNEL);
				strncpy(tcon->nativeFileSystem, bcc_ptr,
					length);
			}
			/* else do not bother copying these informational fields */
		}
		tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
		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;

	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"));
				if(cifsd_task)
					send_sig(SIGKILL,cifsd_task,1);
				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;
	if (ses) {
		set_current_state(TASK_INTERRUPTIBLE);
		schedule_timeout(HZ / 2);
	}
	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;
	char ntlm_session_key[CIFS_SESSION_KEY_SIZE];
	int ntlmv2_flag = FALSE;
	int first_time = 0;

	/* 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);

		}
		first_time = 1;
	}
	if (!rc) {
		pSesInfo->capabilities = pSesInfo->server->capabilities;
		if(linuxExtEnabled == 0)
			pSesInfo->capabilities &= (~CAP_UNIX);
	/*	pSesInfo->sequence_number = 0;*/
		cFYI(1,("Security Mode: 0x%x Capabilities: 0x%x Time Zone: %d",
			pSesInfo->server->secMode,
			pSesInfo->server->capabilities,
			pSesInfo->server->timeZone));
		if (extended_security
				&& (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
				&& (pSesInfo->server->secType == NTLMSSP)) {
			cFYI(1, ("New style sesssetup "));
			rc = CIFSSpnegoSessSetup(xid, pSesInfo,
				NULL /* security blob */, 
				0 /* blob length */,
				nls_info);
		} else if (extended_security
			   && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
			   && (pSesInfo->server->secType == RawNTLMSSP)) {
			cFYI(1, ("NTLMSSP sesssetup "));
			rc = CIFSNTLMSSPNegotiateSessSetup(xid,
						pSesInfo,
						&ntlmv2_flag,
						nls_info);
			if (!rc) {
				if(ntlmv2_flag) {
					char * v2_response;
					cFYI(1,("Can use more secure NTLM version 2 password hash"));
					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);
				/*		if(first_time)
							cifs_calculate_ntlmv2_mac_key(
							  pSesInfo->server->mac_signing_key, 
							  response, ntlm_session_key, */
						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);

					if(first_time)
						cifs_calculate_mac_key(
							pSesInfo->server->mac_signing_key,
							ntlm_session_key,
							pSesInfo->password);
				}
			/* 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);

			if(first_time) 		
				cifs_calculate_mac_key(
					pSesInfo->server->mac_signing_key,
					ntlm_session_key, pSesInfo->password);

			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;
}