connect.c 105.5 KB
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/*
 *   fs/cifs/connect.c
 *
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 *   Copyright (C) International Business Machines  Corp., 2002,2006
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 *   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>
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#include <linux/delay.h>
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#include <linux/completion.h>
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#include <linux/kthread.h>
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#include <linux/pagevec.h>
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#include <linux/freezer.h>
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#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"
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#include "cn_cifs.h"
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#define CIFS_PORT 445
#define RFC1001_PORT 139

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static DECLARE_COMPLETION(cifsd_complete);

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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 */
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	char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */
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	uid_t linux_uid;
	gid_t linux_gid;
	mode_t file_mode;
	mode_t dir_mode;
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	unsigned secFlg;
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	unsigned rw:1;
	unsigned retry:1;
	unsigned intr:1;
	unsigned setuids:1;
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	unsigned override_uid:1;
	unsigned override_gid:1;
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	unsigned noperm:1;
	unsigned no_psx_acl:1; /* set if posix acl support should be disabled */
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	unsigned cifs_acl:1;
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	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;
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	unsigned remap:1;   /* set to remap seven reserved chars in filenames */
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	unsigned posix_paths:1;   /* unset to not ask for posix pathnames. */
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	unsigned sfu_emul:1;
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	unsigned nullauth:1; /* attempt to authenticate with null user */
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	unsigned nocase;     /* request case insensitive filenames */
	unsigned nobrl;      /* disable sending byte range locks to srv */
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	unsigned int rsize;
	unsigned int wsize;
	unsigned int sockopt;
	unsigned short int port;
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	char * prepath;
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};

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

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static int
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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);
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	if( kthread_should_stop() ) {
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		/* 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;

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	cFYI(1, ("Reconnecting tcp session"));
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	/* 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) {
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				/* 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 */
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				mid_entry->midState = MID_RETRY_NEEDED;
			}
		}
	}
	spin_unlock(&GlobalMid_Lock);
	up(&server->tcpSem); 

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	while ( (!kthread_should_stop()) && (server->tcpStatus != CifsGood))
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	{
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		try_to_freeze();
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		if(server->protocolType == IPV6) {
			rc = ipv6_connect(&server->addr.sockAddr6,&server->ssocket);
		} else {
			rc = ipv4_connect(&server->addr.sockAddr, 
					&server->ssocket,
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					server->workstation_RFC1001_name,
					server->server_RFC1001_name);
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		}
		if(rc) {
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			cFYI(1,("reconnect error %d",rc));
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			msleep(3000);
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		} else {
			atomic_inc(&tcpSesReconnectCount);
			spin_lock(&GlobalMid_Lock);
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			if( !kthread_should_stop() )
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				server->tcpStatus = CifsGood;
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			server->sequence_number = 0;
			spin_unlock(&GlobalMid_Lock);			
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	/*		atomic_set(&server->inFlight,0);*/
			wake_up(&server->response_q);
		}
	}
	return rc;
}

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/* 
	return codes:
		0 	not a transact2, or all data present
		>0 	transact2 with that much data missing
		-EINVAL = invalid transact2

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

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

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

	pSMBt = (struct smb_t2_rsp *)pSMB;

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

	remaining = total_data_size - data_in_this_rsp;

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

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

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

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

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

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

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

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

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

	data_area_of_target += total_in_buf;

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

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	byte_count = pTargetSMB->smb_buf_length;
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	byte_count += total_in_buf2;

	/* BB also add check that we are not beyond maximum buffer size */
		
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	pTargetSMB->smb_buf_length = byte_count;
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	if(remaining == total_in_buf2) {
		cFYI(1,("found the last secondary response"));
		return 0; /* we are done */
	} else /* more responses to go */
		return 1;

}

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static int
cifs_demultiplex_thread(struct TCP_Server_Info *server)
{
	int length;
	unsigned int pdu_length, total_read;
	struct smb_hdr *smb_buffer = NULL;
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	struct smb_hdr *bigbuf = NULL;
	struct smb_hdr *smallbuf = NULL;
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	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;
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	char temp;
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	int isLargeBuf = FALSE;
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	int isMultiRsp;
	int reconnect;
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	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);
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	complete(&cifsd_complete);
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	if(length  > 1) {
		mempool_resize(cifs_req_poolp,
			length + cifs_min_rcv,
			GFP_KERNEL);
	}

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	while (!kthread_should_stop()) {
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		if (try_to_freeze())
			continue;
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		if (bigbuf == NULL) {
			bigbuf = cifs_buf_get();
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			if (!bigbuf) {
				cERROR(1, ("No memory for large SMB response"));
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				msleep(3000);
				/* retry will check if exiting */
				continue;
			}
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		} else if (isLargeBuf) {
			/* we are reusing a dirty large buf, clear its start */
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			memset(bigbuf, 0, sizeof (struct smb_hdr));
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		}
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		if (smallbuf == NULL) {
			smallbuf = cifs_small_buf_get();
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			if (!smallbuf) {
				cERROR(1, ("No memory for SMB response"));
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				msleep(1000);
				/* retry will check if exiting */
				continue;
			}
			/* beginning of smb buffer is cleared in our buf_get */
		} else /* if existing small buf clear beginning */
			memset(smallbuf, 0, sizeof (struct smb_hdr));

		isLargeBuf = FALSE;
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		isMultiRsp = FALSE;
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		smb_buffer = smallbuf;
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		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 */);

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		if ( kthread_should_stop() ) {
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			break;
		} else if (server->tcpStatus == CifsNeedReconnect) {
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			cFYI(1, ("Reconnect after server stopped responding"));
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			cifs_reconnect(server);
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			cFYI(1, ("call to reconnect done"));
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			csocket = server->ssocket;
			continue;
		} else if ((length == -ERESTARTSYS) || (length == -EAGAIN)) {
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			msleep(1); /* minimum sleep to prevent looping
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				allowing socket to clear and app threads to set
				tcpStatus CifsNeedReconnect if server hung */
			continue;
		} else if (length <= 0) {
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			if (server->tcpStatus == CifsNew) {
				cFYI(1, ("tcp session abend after SMBnegprot"));
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				/* some servers kill the TCP session rather than
				   returning an SMB negprot error, in which
				   case reconnecting here is not going to help,
				   and so simply return error to mount */
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				break;
			}
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			if (!try_to_freeze() && (length == -EINTR)) {
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				cFYI(1,("cifsd thread killed"));
				break;
			}
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			cFYI(1,("Reconnect after unexpected peek error %d",
				length));
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			cifs_reconnect(server);
			csocket = server->ssocket;
			wake_up(&server->response_q);
			continue;
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		} else if (length < 4) {
			cFYI(1,
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			    ("Frame under four bytes received (%d bytes long)",
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			      length));
			cifs_reconnect(server);
			csocket = server->ssocket;
			wake_up(&server->response_q);
			continue;
		}
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		/* The right amount was read from socket - 4 bytes */
		/* so we can now interpret the length field */
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		/* the first byte big endian of the length field,
		is actually not part of the length but the type
		with the most common, zero, as regular data */
		temp = *((char *) smb_buffer);
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		/* Note that FC 1001 length is big endian on the wire, 
		but we convert it here so it is always manipulated
		as host byte order */
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		pdu_length = ntohl(smb_buffer->smb_buf_length);
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		smb_buffer->smb_buf_length = pdu_length;

		cFYI(1,("rfc1002 length 0x%x)", pdu_length+4));
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		if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) {
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			continue; 
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		} else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) {
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			cFYI(1,("Good RFC 1002 session rsp"));
			continue;
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		} else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) {
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			/* we get this from Windows 98 instead of 
			   an error on SMB negprot response */
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			cFYI(1,("Negative RFC1002 Session Response Error 0x%x)",
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				pdu_length));
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			if(server->tcpStatus == CifsNew) {
				/* if nack on negprot (rather than 
				ret of smb negprot error) reconnecting
				not going to help, ret error to mount */
				break;
			} else {
				/* give server a second to
				clean up before reconnect attempt */
				msleep(1000);
				/* always try 445 first on reconnect
				since we get NACK on some if we ever
				connected to port 139 (the NACK is 
				since we do not begin with RFC1001
				session initialize frame) */
				server->addr.sockAddr.sin_port = 
					htons(CIFS_PORT);
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				cifs_reconnect(server);
				csocket = server->ssocket;
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				wake_up(&server->response_q);
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				continue;
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			}
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		} else if (temp != (char) 0) {
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			cERROR(1,("Unknown RFC 1002 frame"));
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			cifs_dump_mem(" Received Data: ", (char *)smb_buffer,
				      length);
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			cifs_reconnect(server);
			csocket = server->ssocket;
			continue;
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		}

		/* else we have an SMB response */
		if((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) ||
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			    (pdu_length < sizeof (struct smb_hdr) - 1 - 4)) {
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			cERROR(1, ("Invalid size SMB length %d pdu_length %d",
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					length, pdu_length+4));
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			cifs_reconnect(server);
			csocket = server->ssocket;
			wake_up(&server->response_q);
			continue;
		} 

		/* else length ok */
		reconnect = 0;

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		if(pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) {
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			isLargeBuf = TRUE;
			memcpy(bigbuf, smallbuf, 4);
			smb_buffer = bigbuf;
		}
		length = 0;
		iov.iov_base = 4 + (char *)smb_buffer;
		iov.iov_len = pdu_length;
		for (total_read = 0; total_read < pdu_length; 
		     total_read += length) {
			length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
						pdu_length - total_read, 0);
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			if( kthread_should_stop() ||
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			    (length == -EINTR)) {
				/* then will exit */
				reconnect = 2;
				break;
			} else if (server->tcpStatus == CifsNeedReconnect) {
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				cifs_reconnect(server);
				csocket = server->ssocket;
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			        /* Reconnect wakes up rspns q */
				/* Now we will reread sock */
				reconnect = 1;
				break;
			} else if ((length == -ERESTARTSYS) || 
				   (length == -EAGAIN)) {
				msleep(1); /* minimum sleep to prevent looping,
                                              allowing socket to clear and app 
					      threads to set tcpStatus
					      CifsNeedReconnect if server hung*/
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				continue;
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			} else if (length <= 0) {
				cERROR(1,("Received no data, expecting %d",
					      pdu_length - total_read));
				cifs_reconnect(server);
				csocket = server->ssocket;
				reconnect = 1;
				break;
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			}
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		}
		if(reconnect == 2)
			break;
		else if(reconnect == 1)
			continue;
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		length += 4; /* account for rfc1002 hdr */
	
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		dump_smb(smb_buffer, length);
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		if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) {
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			cifs_dump_mem("Bad SMB: ", smb_buffer, 48);
568 569
			continue;
		}
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571 572 573 574 575 576 577 578 579 580 581

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

			if ((mid_entry->mid == smb_buffer->Mid) && 
			    (mid_entry->midState == MID_REQUEST_SUBMITTED) &&
			    (mid_entry->command == smb_buffer->Command)) {
				if(check2ndT2(smb_buffer,server->maxBuf) > 0) {
					/* We have a multipart transact2 resp */
582
					isMultiRsp = TRUE;
583 584 585 586
					if(mid_entry->resp_buf) {
						/* merge response - fix up 1st*/
						if(coalesce_t2(smb_buffer, 
							mid_entry->resp_buf)) {
587
							mid_entry->multiRsp = 1;
588 589 590
							break;
						} else {
							/* all parts received */
591
							mid_entry->multiEnd = 1;
592 593 594 595 596 597 598 599
							goto multi_t2_fnd; 
						}
					} else {
						if(!isLargeBuf) {
							cERROR(1,("1st trans2 resp needs bigbuf"));
					/* BB maybe we can fix this up,  switch
				   	   to already allocated large buffer? */
						} else {
600
							/* Have first buffer */
601 602 603 604 605 606 607 608 609
							mid_entry->resp_buf =
								 smb_buffer;
							mid_entry->largeBuf = 1;
							bigbuf = NULL;
						}
					}
					break;
				} 
				mid_entry->resp_buf = smb_buffer;
610
				if(isLargeBuf)
611
					mid_entry->largeBuf = 1;
612
				else
613 614 615 616
					mid_entry->largeBuf = 0;
multi_t2_fnd:
				task_to_wake = mid_entry->tsk;
				mid_entry->midState = MID_RESPONSE_RECEIVED;
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#ifdef CONFIG_CIFS_STATS2
				mid_entry->when_received = jiffies;
#endif
620 621 622 623
				/* so we do not time out requests to  server
				which is still responding (since server could
				be busy but not dead) */
				server->lstrp = jiffies;
624
				break;
625
			}
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		}
627 628
		spin_unlock(&GlobalMid_Lock);
		if (task_to_wake) {
629 630 631 632 633 634 635 636
			/* Was previous buf put in mpx struct for multi-rsp? */
			if(!isMultiRsp) {
				/* smb buffer will be freed by user thread */
				if(isLargeBuf) {
					bigbuf = NULL;
				} else
					smallbuf = NULL;
			}
637
			wake_up_process(task_to_wake);
638
		} else if ((is_valid_oplock_break(smb_buffer, server) == FALSE)
639
		    && (isMultiRsp == FALSE)) {                          
640
			cERROR(1, ("No task to wake, unknown frame rcvd! NumMids %d", midCount.counter));
641 642
			cifs_dump_mem("Received Data is: ",(char *)smb_buffer,
				      sizeof(struct smb_hdr));
643 644 645 646 647
#ifdef CONFIG_CIFS_DEBUG2
			cifs_dump_detail(smb_buffer);
			cifs_dump_mids(server);
#endif /* CIFS_DEBUG2 */
			
648 649 650
		}
	} /* end while !EXITING */

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	spin_lock(&GlobalMid_Lock);
	server->tcpStatus = CifsExiting;
	server->tsk = NULL;
654 655 656 657 658 659 660
	/* check if we have blocked requests that need to free */
	/* Note that cifs_max_pending is normally 50, but
	can be set at module install time to as little as two */
	if(atomic_read(&server->inFlight) >= cifs_max_pending)
		atomic_set(&server->inFlight, cifs_max_pending - 1);
	/* We do not want to set the max_pending too low or we
	could end up with the counter going negative */
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	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
664
	that may haven been blocked when more than 50 at time were on the wire
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	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 */
669 670
	msleep(125);
	
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	if(server->ssocket) {
		sock_release(csocket);
		server->ssocket = NULL;
	}
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	/* buffer usuallly freed in free_mid - need to free it here on exit */
	if (bigbuf != NULL)
		cifs_buf_release(bigbuf);
	if (smallbuf != NULL)
		cifs_small_buf_release(smallbuf);
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	read_lock(&GlobalSMBSeslock);
	if (list_empty(&server->pending_mid_q)) {
683 684
		/* loop through server session structures attached to this and
		    mark them dead */
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		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 {
696 697 698 699 700 701 702 703 704 705 706
		/* although we can not zero the server struct pointer yet,
		since there are active requests which may depnd on them,
		mark the corresponding SMB sessions as exiting too */
		list_for_each(tmp, &GlobalSMBSessionList) {
			ses = list_entry(tmp, struct cifsSesInfo,
					 cifsSessionList);
			if (ses->server == server) {
				ses->status = CifsExiting;
			}
		}

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		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,
712
				  ("Clearing Mid 0x%x - waking up ",mid_entry->mid));
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				task_to_wake = mid_entry->tsk;
				if(task_to_wake) {
					wake_up_process(task_to_wake);
				}
			}
		}
		spin_unlock(&GlobalMid_Lock);
		read_unlock(&GlobalSMBSeslock);
		/* 1/8th of sec is more than enough time for them to exit */
722
		msleep(125);
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	}

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

	write_lock(&GlobalSMBSeslock);
	atomic_dec(&tcpSesAllocCount);
	length = tcpSesAllocCount.counter;
741 742 743 744 745 746 747 748 749 750 751 752

	/* last chance to mark ses pointers invalid
	if there are any pointing to this (e.g
	if a crazy root user tried to kill cifsd 
	kernel thread explicitly this might happen) */
	list_for_each(tmp, &GlobalSMBSessionList) {
		ses = list_entry(tmp, struct cifsSesInfo,
				cifsSessionList);
		if (ses->server == server) {
			ses->server = NULL;
		}
	}
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	write_unlock(&GlobalSMBSeslock);
754 755

	kfree(server);
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	if(length  > 0) {
		mempool_resize(cifs_req_poolp,
			length + cifs_min_rcv,
			GFP_KERNEL);
	}
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	return 0;
}

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

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

776
	if (Local_System_Name[0] != 0)
777 778
		memcpy(vol->source_rfc1001_name, Local_System_Name,15);
	else {
779 780
		char *nodename = utsname()->nodename;
		int n = strnlen(nodename,15);
781
		memset(vol->source_rfc1001_name,0x20,15);
782
		for(i=0 ; i < n ; i++) {
783 784 785
			/* does not have to be perfect mapping since field is
			informational, only used for servers that do not support
			port 445 and it can be overridden at mount time */
786
			vol->source_rfc1001_name[i] = toupper(nodename[i]);
787
		}
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	}
	vol->source_rfc1001_name[15] = 0;
790 791 792
	/* null target name indicates to use *SMBSERVR default called name
	   if we end up sending RFC1001 session initialize */
	vol->target_rfc1001_name[0] = 0;
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	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;
801 802 803
	/* default is always to request posix paths. */
	vol->posix_paths = 1;

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	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) {
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			if (!value) {
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				printk(KERN_WARNING
				       "CIFS: invalid or missing username\n");
				return 1;	/* needs_arg; */
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			} else if(!*value) {
				/* null user, ie anonymous, authentication */
				vol->nullauth = 1;
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			}
			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 */

869 870
			if ((value[temp_len] == 0) && 
			    (value[temp_len+1] == separator[0])) {
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				/* 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]) {
876 877 878 879
						if (value[temp_len+1] == 
						     separator[0]) {
						/* skip second comma */
							temp_len++;
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						} 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 */
898
				vol->password = kzalloc(temp_len, GFP_KERNEL);
899 900 901 902
				if(vol->password == NULL) {
					printk("CIFS: no memory for pass\n");
					return 1;
				}
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				for(i=0,j=0;i<temp_len;i++,j++) {
					vol->password[j] = value[i];
905 906
					if(value[i] == separator[0]
						&& value[i+1] == separator[0]) {
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						/* skip second comma */
						i++;
					}
				}
				vol->password[j] = 0;
			} else {
913
				vol->password = kzalloc(temp_len+1, GFP_KERNEL);
914 915 916 917
				if(vol->password == NULL) {
					printk("CIFS: no memory for pass\n");
					return 1;
				}
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				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;
			}
929 930 931 932 933
                } else if (strnicmp(data, "sec", 3) == 0) { 
                        if (!value || !*value) {
				cERROR(1,("no security value specified"));
                                continue;
                        } else if (strnicmp(value, "krb5i", 5) == 0) {
934
				vol->secFlg |= CIFSSEC_MAY_KRB5 | 
935
					CIFSSEC_MUST_SIGN;
936
			} else if (strnicmp(value, "krb5p", 5) == 0) {
937
				/* vol->secFlg |= CIFSSEC_MUST_SEAL | 
938
					CIFSSEC_MAY_KRB5; */ 
939 940 941
				cERROR(1,("Krb5 cifs privacy not supported"));
				return 1;
			} else if (strnicmp(value, "krb5", 4) == 0) {
942
				vol->secFlg |= CIFSSEC_MAY_KRB5;
943
			} else if (strnicmp(value, "ntlmv2i", 7) == 0) {
944
				vol->secFlg |= CIFSSEC_MAY_NTLMV2 |
945
					CIFSSEC_MUST_SIGN;
946
			} else if (strnicmp(value, "ntlmv2", 6) == 0) {
947
				vol->secFlg |= CIFSSEC_MAY_NTLMV2;
948
			} else if (strnicmp(value, "ntlmi", 5) == 0) {
949
				vol->secFlg |= CIFSSEC_MAY_NTLM |
950
					CIFSSEC_MUST_SIGN;
951 952
			} else if (strnicmp(value, "ntlm", 4) == 0) {
				/* ntlm is default so can be turned off too */
953
				vol->secFlg |= CIFSSEC_MAY_NTLM;
954
			} else if (strnicmp(value, "nontlm", 6) == 0) {
955
				/* BB is there a better way to do this? */
956
				vol->secFlg |= CIFSSEC_MAY_NTLMV2;
957 958
#ifdef CONFIG_CIFS_WEAK_PW_HASH
			} else if (strnicmp(value, "lanman", 6) == 0) {
959
                                vol->secFlg |= CIFSSEC_MAY_LANMAN;
960
#endif
961
			} else if (strnicmp(value, "none", 4) == 0) {
962
				vol->nullauth = 1;
963 964 965 966
                        } else {
                                cERROR(1,("bad security option: %s", value));
                                return 1;
                        }
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		} 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);
977
				if (vol->UNC == NULL)
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					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? */
1000
			if (strnlen(value, 256) < 256) {
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				vol->domainname = value;
				cFYI(1, ("Domain name set"));
			} else {
				printk(KERN_WARNING "CIFS: domain name too long\n");
				return 1;
			}
1007 1008 1009 1010 1011 1012 1013
                } else if (strnicmp(data, "prefixpath", 10) == 0) {
                        if (!value || !*value) {
                                printk(KERN_WARNING
                                       "CIFS: invalid path prefix\n");
                                return 1;       /* needs_arg; */
                        }
                        if ((temp_len = strnlen(value, 1024)) < 1024) {
1014
				if (value[0] != '/')
1015 1016
					temp_len++;  /* missing leading slash */
                                vol->prepath = kmalloc(temp_len+1,GFP_KERNEL);
1017
                                if (vol->prepath == NULL)
1018
                                        return 1;
1019
				if (value[0] != '/') {
1020 1021 1022 1023 1024 1025 1026 1027 1028
					vol->prepath[0] = '/';
	                                strcpy(vol->prepath+1,value);
				} else
					strcpy(vol->prepath,value);
				cFYI(1,("prefix path %s",vol->prepath));
                        } else {
                                printk(KERN_WARNING "CIFS: prefix too long\n");
                                return 1;
                        }
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		} 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) {
1035
				if (strnicmp(value,"default",7))
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					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);
1047
				vol->override_uid = 1;
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			}
		} else if (strnicmp(data, "gid", 3) == 0) {
			if (value && *value) {
				vol->linux_gid =
					simple_strtoul(value, &value, 0);
1053
				vol->override_gid = 1;
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			}
		} 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  */
1108
				if ((i==15) && (value[i] != 0))
1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131
					printk(KERN_WARNING "CIFS: netbiosname longer than 15 truncated.\n");
			}
		} else if (strnicmp(data, "servern", 7) == 0) {
			/* servernetbiosname specified override *SMBSERVER */
			if (!value || !*value || (*value == ' ')) {
				cFYI(1,("empty server netbiosname specified"));
			} else {
				/* last byte, type, is 0x20 for servr type */
				memset(vol->target_rfc1001_name,0x20,16);

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

				/* user or mount helper must uppercase netbiosname */
					if (value[i]==0)
						break;
					else
						vol->target_rfc1001_name[i] = value[i];
				}
				/* The string has 16th byte zero still from
				   set at top of the function  */
1132
				if ((i==15) && (value[i] != 0))
1133
					printk(KERN_WARNING "CIFS: server netbiosname longer than 15 truncated.\n");
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			}
		} 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;
1167 1168 1169 1170
		} else if (strnicmp(data, "mapchars", 8) == 0) {
			vol->remap = 1;
		} else if (strnicmp(data, "nomapchars", 10) == 0) {
			vol->remap = 0;
1171 1172 1173 1174
                } else if (strnicmp(data, "sfu", 3) == 0) {
                        vol->sfu_emul = 1;
                } else if (strnicmp(data, "nosfu", 5) == 0) {
                        vol->sfu_emul = 0;
1175 1176 1177 1178
		} else if (strnicmp(data, "posixpaths", 10) == 0) {
			vol->posix_paths = 1;
		} else if (strnicmp(data, "noposixpaths", 12) == 0) {
			vol->posix_paths = 0;
1179 1180
                } else if ((strnicmp(data, "nocase", 6) == 0) ||
			   (strnicmp(data, "ignorecase", 10)  == 0)) {
1181 1182 1183
                        vol->nocase = 1;
		} else if (strnicmp(data, "brl", 3) == 0) {
			vol->nobrl =  0;
1184
		} else if ((strnicmp(data, "nobrl", 5) == 0) || 
1185
			   (strnicmp(data, "nolock", 6) == 0)) {
1186
			vol->nobrl =  1;
1187 1188 1189 1190 1191
			/* turn off mandatory locking in mode
			if remote locking is turned off since the
			local vfs will do advisory */
			if(vol->file_mode == (S_IALLUGO & ~(S_ISUID | S_IXGRP)))
				vol->file_mode = S_IALLUGO;
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		} 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;
1208 1209 1210 1211
		} else if (strnicmp(data, "cifsacl",7) == 0) {
			vol->cifs_acl = 1;
		} else if (strnicmp(data, "nocifsacl", 9) == 0) {
			vol->cifs_acl = 0;
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		} else if (strnicmp(data, "acl",3) == 0) {
			vol->no_psx_acl = 0;
		} else if (strnicmp(data, "noacl",5) == 0) {
			vol->no_psx_acl = 1;
1216 1217 1218 1219
		} else if (strnicmp(data, "sign",4) == 0) {
			vol->secFlg |= CIFSSEC_MUST_SIGN;
/*		} else if (strnicmp(data, "seal",4) == 0) {
			vol->secFlg |= CIFSSEC_MUST_SEAL; */
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		} 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) {
1239
		if (devname == NULL) {
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			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);
1245
			if (vol->UNC == NULL)
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				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) {
1309
		cFYI(1, ("Next tcon"));
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		tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
		if (tcon->ses) {
			if (tcon->ses->server) {
				cFYI(1,
1314
				     ("old ip addr: %x == new ip %x ?",
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				      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) {
1319
	/* BB lock tcon, server and tcp session and increment use count here? */
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					/* found a match on the TCP session */
					/* BB check if reconnection needed */
1322
					cFYI(1,("IP match, old UNC: %s new: %s",
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					      tcon->treeName, uncName));
					if (strncmp
					    (tcon->treeName, uncName,
					     MAX_TREE_SIZE) == 0) {
						cFYI(1,
1328
						     ("and old usr: %s new: %s",
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						      tcon->treeName, uncName));
						if (strncmp
						    (tcon->ses->userName,
						     userName,
						     MAX_USERNAME_SIZE) == 0) {
							read_unlock(&GlobalSMBSeslock);
1335 1336 1337
							/* matched smb session
							(user name */
							return tcon;
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						}
					}
				}
			}
		}
	}
	read_unlock(&GlobalSMBSeslock);
	return NULL;
}

int
connect_to_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
1350 1351
		    const char *old_path, const struct nls_table *nls_codepage,
		    int remap)
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{
	unsigned char *referrals = NULL;
	unsigned int num_referrals;
	int rc = 0;

	rc = get_dfs_path(xid, pSesInfo,old_path, nls_codepage, 
1358
			&num_referrals, &referrals, remap);
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	/* 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 */

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	kfree(referrals);
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	return rc;
}

int
get_dfs_path(int xid, struct cifsSesInfo *pSesInfo,
			const char *old_path, const struct nls_table *nls_codepage, 
1372 1373
			unsigned int *pnum_referrals, 
			unsigned char ** preferrals, int remap)
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{
	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,
1398
				     pnum_referrals, nls_codepage, remap);
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	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, 
1420
	     char * netbios_name, char * target_name)
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{
	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 */
1485 1486
	 cFYI(1,("sndbuf %d rcvbuf %d rcvtimeo 0x%lx",(*csocket)->sk->sk_sndbuf,
		 (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
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	(*csocket)->sk->sk_rcvtimeo = 7 * HZ;
1488 1489 1490 1491 1492
	/* make the bufsizes depend on wsize/rsize and max requests */
	if((*csocket)->sk->sk_sndbuf < (200 * 1024))
		(*csocket)->sk->sk_sndbuf = 200 * 1024;
	if((*csocket)->sk->sk_rcvbuf < (140 * 1024))
		(*csocket)->sk->sk_rcvbuf = 140 * 1024;
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	/* 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;
1501
		ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), GFP_KERNEL);
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		if(ses_init_buf) {
			ses_init_buf->trailer.session_req.called_len = 32;
1504 1505 1506 1507 1508 1509 1510 1511
			if(target_name && (target_name[0] != 0)) {
				rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
					target_name, 16);
			} else {
				rfc1002mangle(ses_init_buf->trailer.session_req.called_name,
					DEFAULT_CIFS_CALLED_NAME,16);
			}

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			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);
1530 1531 1532 1533 1534 1535 1536 1537
			msleep(1); /* RFC1001 layer in at least one server 
				      requires very short break before negprot
				      presumably because not expecting negprot
				      to follow so fast.  This is a simple
				      solution that works without 
				      complicating the code and causes no
				      significant slowing down on mount
				      for everyone else */
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		}
		/* 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;
}

1619 1620 1621 1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668
void reset_cifs_unix_caps(int xid, struct cifsTconInfo * tcon, 
			  struct super_block * sb, struct smb_vol * vol_info)
{
	/* if we are reconnecting then should we check to see if
	 * any requested capabilities changed locally e.g. via
	 * remount but we can not do much about it here
	 * if they have (even if we could detect it by the following)
	 * Perhaps we could add a backpointer to array of sb from tcon
	 * or if we change to make all sb to same share the same
	 * sb as NFS - then we only have one backpointer to sb.
	 * What if we wanted to mount the server share twice once with
	 * and once without posixacls or posix paths? */
	__u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
	   
	 
	if(!CIFSSMBQFSUnixInfo(xid, tcon)) {
		__u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability);
		
		/* check for reconnect case in which we do not
		   want to change the mount behavior if we can avoid it */
		if(vol_info == NULL) {
			/* turn off POSIX ACL and PATHNAMES if not set 
			   originally at mount time */
			if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0)
				cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
			if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0)
				cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
				

			 
			
		}
		
		cap &= CIFS_UNIX_CAP_MASK;
		if(vol_info && vol_info->no_psx_acl)
			cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
		else if(CIFS_UNIX_POSIX_ACL_CAP & cap) {
			cFYI(1,("negotiated posix acl support"));
			if(sb)
				sb->s_flags |= MS_POSIXACL;
		}

		if(vol_info && vol_info->posix_paths == 0)
			cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
		else if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
			cFYI(1,("negotiate posix pathnames"));
			if(sb)
				CIFS_SB(sb)->mnt_cifs_flags |= 
					CIFS_MOUNT_POSIX_PATHS;
		}
1669 1670 1671 1672
	
		/* We might be setting the path sep back to a different
		form if we are reconnecting and the server switched its
		posix path capability for this share */	
1673
		if(sb && (CIFS_SB(sb)->prepathlen > 0))
1674 1675
			CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
	
1676 1677 1678 1679 1680 1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694
		cFYI(1,("Negotiate caps 0x%x",(int)cap));
#ifdef CONFIG_CIFS_DEBUG2
		if(cap & CIFS_UNIX_FCNTL_CAP)
			cFYI(1,("FCNTL cap"));
		if(cap & CIFS_UNIX_EXTATTR_CAP)
			cFYI(1,("EXTATTR cap"));
		if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
			cFYI(1,("POSIX path cap"));
		if(cap & CIFS_UNIX_XATTR_CAP)
			cFYI(1,("XATTR cap"));
		if(cap & CIFS_UNIX_POSIX_ACL_CAP)
			cFYI(1,("POSIX ACL cap"));
#endif /* CIFS_DEBUG2 */
		if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
			cFYI(1,("setting capabilities failed"));
		}
	}
}

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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)) {
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		kfree(volume_info.UNC);
		kfree(volume_info.password);
1719
		kfree(volume_info.prepath);
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		FreeXid(xid);
		return -EINVAL;
	}

1724 1725 1726 1727
	if (volume_info.nullauth) {
		cFYI(1,("null user"));
		volume_info.username = NULL;
	} else if (volume_info.username) {
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		/* BB fixme parse for domain name here */
		cFYI(1, ("Username: %s ", volume_info.username));
	} else {
1731
		cifserror("No username specified");
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        /* In userspace mount helper we can get user name from alternate
           locations such as env variables and files on disk */
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		kfree(volume_info.UNC);
		kfree(volume_info.password);
1736
		kfree(volume_info.prepath);
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		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 */
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			kfree(volume_info.UNC);
			kfree(volume_info.password);
1757
			kfree(volume_info.prepath);
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			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"));
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		kfree(volume_info.UNC);
		kfree(volume_info.password);
1770
		kfree(volume_info.prepath);
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		FreeXid(xid);
		return -EINVAL;
	} else /* which servers DFS root would we conect to */ {
		cERROR(1,
1775
		       ("CIFS mount error: No UNC path (e.g. -o unc=//192.168.1.100/public) specified"));
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		kfree(volume_info.UNC);
		kfree(volume_info.password);
1778
		kfree(volume_info.prepath);
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		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));
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			kfree(volume_info.UNC);
			kfree(volume_info.password);
1793
			kfree(volume_info.prepath);
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			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);
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	else if(address_type == AF_INET6) {
		cFYI(1,("looking for ipv6 address"));
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		existingCifsSes = cifs_find_tcp_session(NULL /* no ipv4 addr */,
			&sin_server6.sin6_addr,
			volume_info.username, &srvTcp);
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	} else {
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		kfree(volume_info.UNC);
		kfree(volume_info.password);
1811
		kfree(volume_info.prepath);
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		FreeXid(xid);
		return -EINVAL;
	}


	if (srvTcp) {
1818
		cFYI(1, ("Existing tcp session with server found"));                
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	} else {	/* create socket */
1820
		if (volume_info.port)
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			sin_server.sin_port = htons(volume_info.port);
		else
			sin_server.sin_port = 0;
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1824 1825 1826 1827 1828 1829 1830
		if (address_type == AF_INET6) {
			cFYI(1,("attempting ipv6 connect"));
			/* BB should we allow ipv6 on port 139? */
			/* other OS never observed in Wild doing 139 with v6 */
			rc = ipv6_connect(&sin_server6,&csocket);
		} else 
			rc = ipv4_connect(&sin_server,&csocket,
1831 1832
				  volume_info.source_rfc1001_name,
				  volume_info.target_rfc1001_name);
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		if (rc < 0) {
			cERROR(1,
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1835
			       ("Error connecting to IPv4 socket. Aborting operation"));			       
1836
			if (csocket != NULL)
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				sock_release(csocket);
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			kfree(volume_info.UNC);
			kfree(volume_info.password);
1840
			kfree(volume_info.prepath);
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			FreeXid(xid);
			return rc;
		}

		srvTcp = kmalloc(sizeof (struct TCP_Server_Info), GFP_KERNEL);
		if (srvTcp == NULL) {
			rc = -ENOMEM;
			sock_release(csocket);
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			kfree(volume_info.UNC);
			kfree(volume_info.password);
1851
			kfree(volume_info.prepath);
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			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);
1869
			srvTcp->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, srvTcp, "cifsd");
1870
			if ( IS_ERR(srvTcp->tsk) ) {
1871 1872 1873
				rc = PTR_ERR(srvTcp->tsk);
				cERROR(1,("error %d create cifsd thread", rc));
				srvTcp->tsk = NULL;
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				sock_release(csocket);
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				kfree(volume_info.UNC);
				kfree(volume_info.password);
1877
				kfree(volume_info.prepath);
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				FreeXid(xid);
				return rc;
1880 1881 1882
			}
			wait_for_completion(&cifsd_complete);
			rc = 0;
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			memcpy(srvTcp->workstation_RFC1001_name, volume_info.source_rfc1001_name,16);
1884
			memcpy(srvTcp->server_RFC1001_name, volume_info.target_rfc1001_name,16);
1885
			srvTcp->sequence_number = 0;
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		}
	}

	if (existingCifsSes) {
		pSesInfo = existingCifsSes;
1891
		cFYI(1, ("Existing smb sess found"));
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		kfree(volume_info.password);
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		/* volume_info.UNC freed at end of function */
	} else if (!rc) {
1895
		cFYI(1, ("Existing smb sess not found"));
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		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);
1912 1913 1914 1915
			if (volume_info.domainname) {
				int len = strlen(volume_info.domainname);
				pSesInfo->domainName = 
					kmalloc(len + 1, GFP_KERNEL);
1916
				if (pSesInfo->domainName)
1917 1918 1919
					strcpy(pSesInfo->domainName,
						volume_info.domainname);
			}
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			pSesInfo->linux_uid = volume_info.linux_uid;
1921
			pSesInfo->overrideSecFlg = volume_info.secFlg;
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			down(&pSesInfo->sesSem);
1923
			/* BB FIXME need to pass vol->secFlgs BB */
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			rc = cifs_setup_session(xid,pSesInfo, cifs_sb->local_nls);
			up(&pSesInfo->sesSem);
1926
			if (!rc)
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				atomic_inc(&srvTcp->socketUseCount);
		} else
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			kfree(volume_info.password);
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	}
    
	/* search for existing tcon to this server share */
	if (!rc) {
1934
		if (volume_info.rsize > CIFSMaxBufSize) {
1935 1936 1937 1938
			cERROR(1,("rsize %d too large, using MaxBufSize",
				volume_info.rsize));
			cifs_sb->rsize = CIFSMaxBufSize;
		} else if((volume_info.rsize) && (volume_info.rsize <= CIFSMaxBufSize))
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			cifs_sb->rsize = volume_info.rsize;
1940 1941 1942
		else /* default */
			cifs_sb->rsize = CIFSMaxBufSize;

1943
		if (volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
1944 1945 1946
			cERROR(1,("wsize %d too large using 4096 instead",
				  volume_info.wsize));
			cifs_sb->wsize = 4096;
1947
		} else if (volume_info.wsize)
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			cifs_sb->wsize = volume_info.wsize;
		else
1950
			cifs_sb->wsize = 
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				min_t(const int, PAGEVEC_SIZE * PAGE_CACHE_SIZE,
					127*1024);
1953 1954 1955 1956 1957 1958 1959
			/* old default of CIFSMaxBufSize was too small now
			   that SMB Write2 can send multiple pages in kvec.   
			   RFC1001 does not describe what happens when frame
			   bigger than 128K is sent so use that as max in
			   conjunction with 52K kvec constraint on arch with 4K
			   page size  */

1960
		if (cifs_sb->rsize < 2048) {
1961 1962 1963
			cifs_sb->rsize = 2048; 
			/* Windows ME may prefer this */
			cFYI(1,("readsize set to minimum 2048"));
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		}
1965 1966
		/* calculate prepath */
		cifs_sb->prepath = volume_info.prepath;
1967
		if (cifs_sb->prepath) {
1968 1969 1970 1971 1972
			cifs_sb->prepathlen = strlen(cifs_sb->prepath);
			cifs_sb->prepath[0] = CIFS_DIR_SEP(cifs_sb);
			volume_info.prepath = NULL;
		} else 
			cifs_sb->prepathlen = 0;
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		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;
1977 1978
		cFYI(1,("file mode: 0x%x  dir mode: 0x%x",
			cifs_sb->mnt_file_mode,cifs_sb->mnt_dir_mode));
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1980
		if (volume_info.noperm)
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			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
1982
		if (volume_info.setuids)
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			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
1984
		if (volume_info.server_ino)
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			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
1986
		if (volume_info.remap)
1987
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
1988
		if (volume_info.no_xattr)
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			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
1990
		if (volume_info.sfu_emul)
1991
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
1992
		if (volume_info.nobrl)
1993
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
1994
		if (volume_info.cifs_acl)
1995
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
1996 1997 1998 1999 2000
		if (volume_info.override_uid)
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID;
		if (volume_info.override_gid)
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID;
		if (volume_info.direct_io) {
2001
			cFYI(1,("mounting share using direct i/o"));
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			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) {
2009
			cFYI(1, ("Found match on UNC path"));
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			/* 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;
2015
			tcon->nocase = volume_info.nocase;
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		} else {
			tcon = tconInfoAlloc();
			if (tcon == NULL)
				rc = -ENOMEM;
			else {
2021 2022
				/* check for null share name ie connecting to 
				 * dfs root */
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2024 2025
				/* BB check if this works for exactly length 
				 * three strings */
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				if ((strchr(volume_info.UNC + 3, '\\') == NULL)
				    && (strchr(volume_info.UNC + 3, '/') ==
					NULL)) {
2029
					rc = connect_to_dfs_path(xid, pSesInfo,
2030 2031 2032
						"", cifs_sb->local_nls,
						cifs_sb->mnt_cifs_flags & 
						  CIFS_MOUNT_MAP_SPECIAL_CHR);
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					kfree(volume_info.UNC);
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					FreeXid(xid);
					return -ENODEV;
				} else {
2037 2038 2039
					/* BB Do we need to wrap sesSem around
					 * this TCon call and Unix SetFS as
					 * we do on SessSetup and reconnect? */
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					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;
2048
					tcon->nocase = volume_info.nocase;
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				}
			}
		}
	}
2053
	if (pSesInfo) {
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		if (pSesInfo->capabilities & CAP_LARGE_FILES) {
			sb->s_maxbytes = (u64) 1 << 63;
		} else
			sb->s_maxbytes = (u64) 1 << 31;	/* 2 GB */
	}

2060
	/* BB FIXME fix time_gran to be larger for LANMAN sessions */
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	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 */
2067
		if (atomic_read(&srvTcp->socketUseCount) == 0) {
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			spin_lock(&GlobalMid_Lock);
			srvTcp->tcpStatus = CifsExiting;
			spin_unlock(&GlobalMid_Lock);
2071
			if (srvTcp->tsk) {
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				send_sig(SIGKILL,srvTcp->tsk,1);
2073
				kthread_stop(srvTcp->tsk);
2074
			}
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		}
		 /* 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 */
2086
					if ((temp_rc == -ESHUTDOWN) &&
2087
					   (pSesInfo->server) && (pSesInfo->server->tsk)) {
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						send_sig(SIGKILL,pSesInfo->server->tsk,1);
2089
						kthread_stop(pSesInfo->server->tsk);
2090
					}
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				} else
					cFYI(1, ("No session or bad tcon"));
				sesInfoFree(pSesInfo);
				/* pSesInfo = NULL; */
			}
		}
	} else {
		atomic_inc(&tcon->useCount);
		cifs_sb->tcon = tcon;
		tcon->ses = pSesInfo;

2102
		/* do not care if following two calls succeed - informational */
2103 2104
		CIFSSMBQFSDeviceInfo(xid, tcon);
		CIFSSMBQFSAttributeInfo(xid, tcon);
2105 2106 2107 2108 2109
		
		/* tell server which Unix caps we support */
		if (tcon->ses->capabilities & CAP_UNIX)
			reset_cifs_unix_caps(xid, tcon, sb, &volume_info);
		
2110 2111 2112 2113
		if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
			cifs_sb->wsize = min(cifs_sb->wsize,
					     (tcon->ses->server->maxBuf -
					      MAX_CIFS_HDR_SIZE));
2114 2115 2116 2117
		if (!(tcon->ses->capabilities & CAP_LARGE_READ_X))
                        cifs_sb->rsize = min(cifs_sb->rsize,
                                             (tcon->ses->server->maxBuf -
                                              MAX_CIFS_HDR_SIZE));
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	}

	/* 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) */
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	kfree(volume_info.UNC);
2125
	kfree(volume_info.prepath);
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	FreeXid(xid);
	return rc;
}

static int
CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2132
	      char session_key[CIFS_SESS_KEY_SIZE],
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	      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;

2149
	cFYI(1, ("In sesssetup"));
2150
	if (ses == NULL)
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		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 */ );

2165
	smb_buffer->Mid = GetNextMid(ses->server);
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	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 = 
2190
		cpu_to_le16(CIFS_SESS_KEY_SIZE);
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	pSMB->req_no_secext.CaseSensitivePasswordLength =
2193
	    cpu_to_le16(CIFS_SESS_KEY_SIZE);
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	bcc_ptr = pByteArea(smb_buffer);
2195 2196 2197 2198
	memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
	bcc_ptr += CIFS_SESS_KEY_SIZE;
	memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
	bcc_ptr += CIFS_SESS_KEY_SIZE;
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2199 2200 2201 2202 2203 2204

	if (ses->capabilities & CAP_UNICODE) {
		if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
			*bcc_ptr = 0;
			bcc_ptr++;
		}
2205
		if (user == NULL)
2206
			bytes_returned = 0; /* skip null user */
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	        else
			bytes_returned =
2209
			        cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
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					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 =
2216
			    cifs_strtoUCS((__le16 *) bcc_ptr,
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					  "CIFS_LINUX_DOM", 32, nls_codepage);
		else
			bytes_returned =
2220
			    cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
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2221 2222 2223 2224
					  nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;
		bytes_returned =
2225
		    cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
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				  32, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bytes_returned =
2229
		    cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release,
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				  32, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;
		bytes_returned =
2234
		    cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
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				  64, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;
	} else {
2239
		if (user != NULL) {                
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		    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 ");
2256 2257
		strcpy(bcc_ptr, utsname()->release);
		bcc_ptr += strlen(utsname()->release) + 1;
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		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  */
2300 2301
				if(ses->serverOS)
					kfree(ses->serverOS);
2302
				ses->serverOS = kzalloc(2 * (len + 1), GFP_KERNEL);
2303 2304
				if(ses->serverOS == NULL)
					goto sesssetup_nomem;
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2305
				cifs_strfromUCS_le(ses->serverOS,
2306
					   (__le16 *)bcc_ptr, len,nls_codepage);
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2307 2308 2309 2310 2311 2312 2313
				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);
2314
					kfree(ses->serverNOS);
2315
					ses->serverNOS = kzalloc(2 * (len + 1),GFP_KERNEL);
2316 2317
					if(ses->serverNOS == NULL)
						goto sesssetup_nomem;
L
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2318
					cifs_strfromUCS_le(ses->serverNOS,
2319
							   (__le16 *)bcc_ptr,len,nls_codepage);
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2320 2321 2322 2323 2324 2325 2326 2327 2328 2329
					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) {
2330
						len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
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2331
          /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2332 2333
						if(ses->serverDomain)
							kfree(ses->serverDomain);
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2334
						ses->serverDomain =
2335
						    kzalloc(2*(len+1),GFP_KERNEL);
2336 2337
						if(ses->serverDomain == NULL)
							goto sesssetup_nomem;
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2338
						cifs_strfromUCS_le(ses->serverDomain,
2339
						     (__le16 *)bcc_ptr,len,nls_codepage);
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2340 2341 2342 2343
						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 */
2344 2345 2346
					else {
						if(ses->serverDomain)
							kfree(ses->serverDomain);
2347
						ses->serverDomain = 
2348
							kzalloc(2, GFP_KERNEL);
2349
					}
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2350
				} else {	/* no room so create dummy domain and NOS string */
2351 2352 2353
					/* if these kcallocs fail not much we
					   can do, but better to not fail the
					   sesssetup itself */
2354
					kfree(ses->serverDomain);
L
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2355
					ses->serverDomain =
2356
					    kzalloc(2, GFP_KERNEL);
2357
					kfree(ses->serverNOS);
L
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2358
					ses->serverNOS =
2359
					    kzalloc(2, GFP_KERNEL);
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2360 2361 2362 2363 2364 2365
				}
			} else {	/* ASCII */
				len = strnlen(bcc_ptr, 1024);
				if (((long) bcc_ptr + len) - (long)
				    pByteArea(smb_buffer_response)
					    <= BCC(smb_buffer_response)) {
2366
					kfree(ses->serverOS);
2367
					ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
2368 2369
					if(ses->serverOS == NULL)
						goto sesssetup_nomem;
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2370 2371 2372 2373 2374 2375 2376
					strncpy(ses->serverOS,bcc_ptr, len);

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

					len = strnlen(bcc_ptr, 1024);
2377
					kfree(ses->serverNOS);
2378
					ses->serverNOS = kzalloc(len + 1,GFP_KERNEL);
2379 2380
					if(ses->serverNOS == NULL)
						goto sesssetup_nomem;
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2381 2382 2383 2384 2385 2386
					strncpy(ses->serverNOS, bcc_ptr, len);
					bcc_ptr += len;
					bcc_ptr[0] = 0;
					bcc_ptr++;

					len = strnlen(bcc_ptr, 1024);
2387 2388
					if(ses->serverDomain)
						kfree(ses->serverDomain);
2389
					ses->serverDomain = kzalloc(len + 1,GFP_KERNEL);
2390 2391
					if(ses->serverDomain == NULL)
						goto sesssetup_nomem;
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2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404 2405 2406 2407 2408 2409 2410
					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;
	}
2411 2412 2413
sesssetup_nomem:	/* do not return an error on nomem for the info strings,
			   since that could make reconnection harder, and
			   reconnection might be needed to free memory */
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2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440
	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;

2441
	cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
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2442 2443 2444 2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456
	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 */ );
2457 2458

	smb_buffer->Mid = GetNextMid(ses->server);
L
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2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471 2472 2473 2474 2475 2476 2477 2478 2479 2480 2481 2482 2483 2484 2485 2486 2487 2488 2489 2490
	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 |
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	    NTLMSSP_REQUEST_TARGET | NTLMSSP_NEGOTIATE_NTLM |
	    NTLMSSP_NEGOTIATE_56 |
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	    /* NTLMSSP_NEGOTIATE_ALWAYS_SIGN | */ NTLMSSP_NEGOTIATE_128;
	if(sign_CIFS_PDUs)
		negotiate_flags |= NTLMSSP_NEGOTIATE_SIGN;
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/*	if(ntlmv2_support)
		negotiate_flags |= NTLMSSP_NEGOTIATE_NTLMV2;*/
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	/* setup pointers to domain name and workstation name */
	bcc_ptr += SecurityBlobLength;

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

2505 2506 2507 2508 2509
	/* Domain not sent on first Sesssetup in NTLMSSP, instead it is sent
	along with username on auth request (ie the response to challenge) */
	SecurityBlob->DomainName.Buffer = 0;
	SecurityBlob->DomainName.Length = 0;
	SecurityBlob->DomainName.MaximumLength = 0;
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	if (ses->capabilities & CAP_UNICODE) {
		if ((long) bcc_ptr % 2) {
			*bcc_ptr = 0;
			bcc_ptr++;
		}

		bytes_returned =
2517
		    cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
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				  32, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bytes_returned =
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		    cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
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				  nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;	/* null terminate Linux version */
		bytes_returned =
2526
		    cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
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				  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 ");
2538 2539
		strcpy(bcc_ptr, utsname()->release);
		bcc_ptr += strlen(utsname()->release) + 1;
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		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 */ 
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			cFYI(1, ("UID = %d", ses->Suid));
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			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;
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					cFYI(1, ("Security Blob Length %d",
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					      blob_len));
				}

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				cFYI(1, ("NTLMSSP Challenge rcvd"));
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				memcpy(ses->server->cryptKey,
				       SecurityBlob2->Challenge,
				       CIFS_CRYPTO_KEY_SIZE);
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				if(SecurityBlob2->NegotiateFlags & 
					cpu_to_le32(NTLMSSP_NEGOTIATE_NTLMV2))
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					*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  */
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					if(ses->serverOS)
						kfree(ses->serverOS);
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					ses->serverOS =
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					    kzalloc(2 * (len + 1), GFP_KERNEL);
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					cifs_strfromUCS_le(ses->serverOS,
2632
							   (__le16 *)
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							   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);
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						kfree(ses->serverNOS);
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						ses->serverNOS =
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						    kzalloc(2 * (len + 1),
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							    GFP_KERNEL);
						cifs_strfromUCS_le(ses->
								   serverNOS,
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								   (__le16 *)
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								   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) */
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							kfree(ses->serverDomain);
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							ses->serverDomain =
2664
							    kzalloc(2 *
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								    (len +
								     1),
								    GFP_KERNEL);
							cifs_strfromUCS_le
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							    (ses->serverDomain,
							     (__le16 *)bcc_ptr,
							     len, nls_codepage);
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							bcc_ptr +=
							    2 * (len + 1);
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							ses->serverDomain[2*len]
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							    = 0;
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							ses->serverDomain
								[1 + (2 * len)]
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							    = 0;
						} /* else no more room so create dummy domain string */
2680
						else {
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							kfree(ses->serverDomain);
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							ses->serverDomain =
2683
							    kzalloc(2,
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								    GFP_KERNEL);
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						}
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					} else {	/* no room so create dummy domain and NOS string */
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						kfree(ses->serverDomain);
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						ses->serverDomain =
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						    kzalloc(2, GFP_KERNEL);
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						kfree(ses->serverNOS);
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						ses->serverNOS =
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						    kzalloc(2, GFP_KERNEL);
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					}
				} else {	/* ASCII */
					len = strnlen(bcc_ptr, 1024);
					if (((long) bcc_ptr + len) - (long)
					    pByteArea(smb_buffer_response)
					    <= BCC(smb_buffer_response)) {
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						if(ses->serverOS)
							kfree(ses->serverOS);
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						ses->serverOS =
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						    kzalloc(len + 1,
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							    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);
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						kfree(ses->serverNOS);
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						ses->serverNOS =
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						    kzalloc(len + 1,
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							    GFP_KERNEL);
						strncpy(ses->serverNOS, bcc_ptr, len);
						bcc_ptr += len;
						bcc_ptr[0] = 0;
						bcc_ptr++;

						len = strnlen(bcc_ptr, 1024);
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						kfree(ses->serverDomain);
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						ses->serverDomain =
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						    kzalloc(len + 1,
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							    GFP_KERNEL);
						strncpy(ses->serverDomain, bcc_ptr, len);	
						bcc_ptr += len;
						bcc_ptr[0] = 0;
						bcc_ptr++;
					} else
						cFYI(1,
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						     ("Variable field of length %d extends beyond end of smb",
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						      len));
				}
			} else {
				cERROR(1,
				       (" Security Blob Length extends beyond end of SMB"));
			}
		} else {
			cERROR(1, ("No session structure passed in."));
		}
	} else {
		cERROR(1,
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		       (" Invalid Word count %d:",
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			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 */ );
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	smb_buffer->Mid = GetNextMid(ses->server);
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	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 =
2848
	    cpu_to_le16(CIFS_SESS_KEY_SIZE);
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	SecurityBlob->NtChallengeResponse.MaximumLength =
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	    cpu_to_le16(CIFS_SESS_KEY_SIZE);
	memcpy(bcc_ptr, ntlm_session_key, CIFS_SESS_KEY_SIZE);
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	SecurityBlob->NtChallengeResponse.Buffer =
	    cpu_to_le32(SecurityBlobLength);
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	SecurityBlobLength += CIFS_SESS_KEY_SIZE;
	bcc_ptr += CIFS_SESS_KEY_SIZE;
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	if (ses->capabilities & CAP_UNICODE) {
		if (domain == NULL) {
			SecurityBlob->DomainName.Buffer = 0;
			SecurityBlob->DomainName.Length = 0;
			SecurityBlob->DomainName.MaximumLength = 0;
		} else {
			__u16 len =
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			    cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
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					  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 =
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			    cifs_strtoUCS((__le16 *) bcc_ptr, user, 64,
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					  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);
		}

2895
		/* SecurityBlob->WorkstationName.Length = cifs_strtoUCS((__le16 *) bcc_ptr, "AMACHINE",64, nls_codepage);
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		   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 =
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		    cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
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				  32, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bytes_returned =
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		    cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release, 32,
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				  nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;	/* null term version string */
		bytes_returned =
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		    cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
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				  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 ");
2964 2965
		strcpy(bcc_ptr, utsname()->release);
		bcc_ptr += strlen(utsname()->release) + 1;
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2966 2967 2968 2969 2970 2971 2972 2973 2974 2975 2976 2977 2978 2979 2980 2981 2982 2983 2984 2985 2986 2987 2988 2989 2990 2991 2992 2993 2994 2995 2996 2997 2998 2999 3000 3001 3002 3003 3004 3005 3006 3007 3008 3009 3010 3011 3012 3013 3014 3015 3016 3017 3018 3019 3020 3021 3022 3023 3024 3025 3026
		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  */
3027
					if(ses->serverOS)
S
Steve French 已提交
3028
						kfree(ses->serverOS);
L
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3029
					ses->serverOS =
3030
					    kzalloc(2 * (len + 1), GFP_KERNEL);
L
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3031
					cifs_strfromUCS_le(ses->serverOS,
3032
							   (__le16 *)
L
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3033 3034 3035 3036 3037 3038 3039 3040 3041 3042 3043
							   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);
3044
						kfree(ses->serverNOS);
L
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3045
						ses->serverNOS =
3046
						    kzalloc(2 * (len + 1),
L
Linus Torvalds 已提交
3047 3048 3049
							    GFP_KERNEL);
						cifs_strfromUCS_le(ses->
								   serverNOS,
3050
								   (__le16 *)
L
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3051 3052 3053 3054 3055 3056 3057 3058 3059 3060
								   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) */
3061 3062
							if(ses->serverDomain)
								kfree(ses->serverDomain);
L
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3063
							ses->serverDomain =
3064
							    kzalloc(2 *
L
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3065 3066 3067 3068 3069 3070
								    (len +
								     1),
								    GFP_KERNEL);
							cifs_strfromUCS_le
							    (ses->
							     serverDomain,
3071
							     (__le16 *)
L
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3072 3073 3074 3075 3076 3077 3078 3079 3080 3081 3082 3083 3084 3085 3086 3087
							     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 */
3088 3089 3090
						else {
							if(ses->serverDomain)
								kfree(ses->serverDomain);
3091
							ses->serverDomain = kzalloc(2,GFP_KERNEL);
3092
						}
L
Linus Torvalds 已提交
3093
					} else {  /* no room so create dummy domain and NOS string */
3094 3095
						if(ses->serverDomain)
							kfree(ses->serverDomain);
3096
						ses->serverDomain = kzalloc(2, GFP_KERNEL);
3097
						kfree(ses->serverNOS);
3098
						ses->serverNOS = kzalloc(2, GFP_KERNEL);
L
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					}
				} else {	/* ASCII */
					len = strnlen(bcc_ptr, 1024);
					if (((long) bcc_ptr + len) - 
                        (long) pByteArea(smb_buffer_response) 
                            <= BCC(smb_buffer_response)) {
3105 3106
						if(ses->serverOS)
							kfree(ses->serverOS);
3107
						ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
L
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3108 3109 3110 3111 3112 3113 3114
						strncpy(ses->serverOS,bcc_ptr, len);

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

						len = strnlen(bcc_ptr, 1024);
3115
						kfree(ses->serverNOS);
3116
						ses->serverNOS = kzalloc(len+1,GFP_KERNEL);
L
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3117 3118 3119 3120 3121 3122
						strncpy(ses->serverNOS, bcc_ptr, len);	
						bcc_ptr += len;
						bcc_ptr[0] = 0;
						bcc_ptr++;

						len = strnlen(bcc_ptr, 1024);
3123 3124
						if(ses->serverDomain)
							kfree(ses->serverDomain);
3125
						ses->serverDomain = kzalloc(len+1,GFP_KERNEL);
L
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3126 3127 3128 3129 3130 3131 3132 3133 3134 3135 3136 3137 3138 3139 3140 3141 3142 3143 3144 3145 3146 3147 3148 3149 3150 3151 3152 3153 3154 3155 3156 3157 3158 3159 3160 3161 3162 3163 3164 3165 3166 3167 3168 3169 3170 3171 3172 3173 3174 3175 3176 3177 3178 3179
						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 */ );
3180 3181

	smb_buffer->Mid = GetNextMid(ses->server);
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	smb_buffer->Uid = ses->Suid;
	pSMB = (TCONX_REQ *) smb_buffer;
	pSMBr = (TCONX_RSP *) smb_buffer_response;

	pSMB->AndXCommand = 0xFF;
	pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO);
	bcc_ptr = &pSMB->Password[0];
3189 3190
	if((ses->server->secMode) & SECMODE_USER) {
		pSMB->PasswordLength = cpu_to_le16(1);	/* minimum */
3191
		*bcc_ptr = 0; /* password is null byte */
3192
		bcc_ptr++;              /* skip password */
3193
		/* already aligned so no need to do it below */
3194
	} else {
3195
		pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
3196 3197 3198
		/* BB FIXME add code to fail this if NTLMv2 or Kerberos
		   specified as required (when that support is added to
		   the vfs in the future) as only NTLM or the much
3199
		   weaker LANMAN (which we do not send by default) is accepted
3200 3201
		   by Samba (not sure whether other servers allow
		   NTLMv2 password here) */
3202 3203 3204 3205 3206 3207
#ifdef CONFIG_CIFS_WEAK_PW_HASH
		if((extended_security & CIFSSEC_MAY_LANMAN) && 
			(ses->server->secType == LANMAN))
			calc_lanman_hash(ses, bcc_ptr);
		else
#endif /* CIFS_WEAK_PW_HASH */
3208 3209 3210 3211
		SMBNTencrypt(ses->password,
			     ses->server->cryptKey,
			     bcc_ptr);

3212 3213 3214 3215 3216 3217
		bcc_ptr += CIFS_SESS_KEY_SIZE;
		if(ses->capabilities & CAP_UNICODE) {
			/* must align unicode strings */
			*bcc_ptr = 0; /* null byte password */
			bcc_ptr++;
		}
3218
	}
L
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3220 3221
	if(ses->server->secMode & 
			(SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
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3222 3223 3224 3225 3226 3227 3228 3229 3230 3231 3232
		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 =
3233 3234 3235 3236
		    cifs_strtoUCS((__le16 *) bcc_ptr, tree, 
			6 /* max utf8 char length in bytes */ * 
			(/* server len*/ + 256 /* share len */), nls_codepage);
		bcc_ptr += 2 * length;	/* convert num 16 bit words to bytes */
L
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3237 3238 3239 3240 3241 3242 3243 3244 3245 3246 3247 3248 3249 3250 3251 3252 3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263 3264 3265
		bcc_ptr += 2;	/* skip trailing null */
	} else {		/* ASCII */
		strcpy(bcc_ptr, tree);
		bcc_ptr += strlen(tree) + 1;
	}
	strcpy(bcc_ptr, "?????");
	bcc_ptr += strlen("?????");
	bcc_ptr += 1;
	count = bcc_ptr - &pSMB->Password[0];
	pSMB->hdr.smb_buf_length += count;
	pSMB->ByteCount = cpu_to_le16(count);

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

	/* if (rc) rc = map_smb_to_linux_error(smb_buffer_response); */
	/* above now done in SendReceive */
	if ((rc == 0) && (tcon != NULL)) {
		tcon->tidStatus = CifsGood;
		tcon->tid = smb_buffer_response->Tid;
		bcc_ptr = pByteArea(smb_buffer_response);
		length = strnlen(bcc_ptr, BCC(smb_buffer_response) - 2);
        /* skip service field (NB: this field is always ASCII) */
		bcc_ptr += length + 1;	
		strncpy(tcon->treeName, tree, MAX_TREE_SIZE);
		if (smb_buffer->Flags2 & SMBFLG2_UNICODE) {
			length = UniStrnlen((wchar_t *) bcc_ptr, 512);
			if ((bcc_ptr + (2 * length)) -
			     pByteArea(smb_buffer_response) <=
			    BCC(smb_buffer_response)) {
J
Jesper Juhl 已提交
3266
				kfree(tcon->nativeFileSystem);
L
Linus Torvalds 已提交
3267
				tcon->nativeFileSystem =
3268
				    kzalloc(length + 2, GFP_KERNEL);
L
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3269
				cifs_strfromUCS_le(tcon->nativeFileSystem,
3270
						   (__le16 *) bcc_ptr,
L
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3271 3272 3273 3274 3275 3276 3277 3278 3279 3280 3281 3282
						   length, nls_codepage);
				bcc_ptr += 2 * length;
				bcc_ptr[0] = 0;	/* null terminate the string */
				bcc_ptr[1] = 0;
				bcc_ptr += 2;
			}
			/* else do not bother copying these informational fields */
		} else {
			length = strnlen(bcc_ptr, 1024);
			if ((bcc_ptr + length) -
			    pByteArea(smb_buffer_response) <=
			    BCC(smb_buffer_response)) {
J
Jesper Juhl 已提交
3283
				kfree(tcon->nativeFileSystem);
L
Linus Torvalds 已提交
3284
				tcon->nativeFileSystem =
3285
				    kzalloc(length + 1, GFP_KERNEL);
L
Linus Torvalds 已提交
3286 3287 3288 3289 3290
				strncpy(tcon->nativeFileSystem, bcc_ptr,
					length);
			}
			/* else do not bother copying these informational fields */
		}
S
Steve French 已提交
3291 3292 3293
		if((smb_buffer_response->WordCount == 3) ||
			 (smb_buffer_response->WordCount == 7))
			/* field is in same location */
3294 3295 3296
			tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
		else
			tcon->Flags = 0;
L
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3297 3298 3299 3300 3301 3302 3303 3304 3305 3306 3307 3308 3309 3310 3311 3312 3313 3314
		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;
3315
	char * tmp;
L
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3316 3317 3318 3319 3320 3321 3322 3323 3324 3325 3326 3327 3328 3329 3330 3331 3332 3333 3334 3335 3336

	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"));
3337
				if(cifsd_task) {
L
Linus Torvalds 已提交
3338
					send_sig(SIGKILL,cifsd_task,1);
3339
					kthread_stop(cifsd_task);
3340
				}
L
Linus Torvalds 已提交
3341 3342 3343 3344 3345 3346 3347 3348
				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;
3349 3350 3351 3352
	tmp = cifs_sb->prepath;
	cifs_sb->prepathlen = 0;
	cifs_sb->prepath = NULL;
	kfree(tmp);
3353 3354
	if (ses)
		schedule_timeout_interruptible(msecs_to_jiffies(500));
L
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3355 3356 3357 3358 3359 3360 3361 3362 3363 3364 3365
	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;
3366
	char ntlm_session_key[CIFS_SESS_KEY_SIZE];
L
Linus Torvalds 已提交
3367
	int ntlmv2_flag = FALSE;
3368
	int first_time = 0;
L
Linus Torvalds 已提交
3369 3370 3371 3372 3373 3374 3375 3376 3377 3378 3379 3380 3381 3382 3383 3384 3385 3386

	/* 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);

		}
3387
		first_time = 1;
L
Linus Torvalds 已提交
3388 3389
	}
	if (!rc) {
3390
		pSesInfo->flags = 0;
L
Linus Torvalds 已提交
3391 3392 3393
		pSesInfo->capabilities = pSesInfo->server->capabilities;
		if(linuxExtEnabled == 0)
			pSesInfo->capabilities &= (~CAP_UNIX);
3394
	/*	pSesInfo->sequence_number = 0;*/
3395
		cFYI(1,("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
L
Linus Torvalds 已提交
3396 3397
			pSesInfo->server->secMode,
			pSesInfo->server->capabilities,
3398
			pSesInfo->server->timeAdj));
3399
		if(experimEnabled < 2)
3400 3401
			rc = CIFS_SessSetup(xid, pSesInfo,
					    first_time, nls_info);
3402
		else if (extended_security
3403 3404
				&& (pSesInfo->capabilities 
					& CAP_EXTENDED_SECURITY)
L
Linus Torvalds 已提交
3405
				&& (pSesInfo->server->secType == NTLMSSP)) {
3406
			rc = -EOPNOTSUPP;
L
Linus Torvalds 已提交
3407 3408 3409
		} else if (extended_security
			   && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
			   && (pSesInfo->server->secType == RawNTLMSSP)) {
3410
			cFYI(1, ("NTLMSSP sesssetup"));
L
Linus Torvalds 已提交
3411 3412 3413 3414 3415 3416 3417
			rc = CIFSNTLMSSPNegotiateSessSetup(xid,
						pSesInfo,
						&ntlmv2_flag,
						nls_info);
			if (!rc) {
				if(ntlmv2_flag) {
					char * v2_response;
3418
					cFYI(1,("more secure NTLM ver2 hash"));
L
Linus Torvalds 已提交
3419 3420 3421 3422 3423 3424 3425 3426
					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);
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				/*		if(first_time)
							cifs_calculate_ntlmv2_mac_key(
							  pSesInfo->server->mac_signing_key, 
							  response, ntlm_session_key, */
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						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);

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

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

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			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;
}