connect.c 106.3 KB
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/*
 *   fs/cifs/connect.c
 *
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 *   Copyright (C) International Business Machines  Corp., 2002,2007
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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
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;
1653
		if (vol_info && vol_info->no_psx_acl)
1654
			cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
1655
		else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
1656 1657 1658 1659 1660
			cFYI(1,("negotiated posix acl support"));
			if(sb)
				sb->s_flags |= MS_POSIXACL;
		}

1661
		if (vol_info && vol_info->posix_paths == 0)
1662
			cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
1663
		else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
1664
			cFYI(1,("negotiate posix pathnames"));
1665
			if (sb)
1666 1667 1668
				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
			CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
1675 1676 1677 1678 1679 1680 1681 1682 1683 1684

		if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
			if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
				CIFS_SB(sb)->rsize = 127 * 1024;
#ifdef CONFIG_CIFS_DEBUG2
				cFYI(1,("larger reads not supported by srv"));
#endif
			}
		}
		
1685
	
1686 1687
		cFYI(1,("Negotiate caps 0x%x",(int)cap));
#ifdef CONFIG_CIFS_DEBUG2
1688
		if (cap & CIFS_UNIX_FCNTL_CAP)
1689
			cFYI(1,("FCNTL cap"));
1690
		if (cap & CIFS_UNIX_EXTATTR_CAP)
1691
			cFYI(1,("EXTATTR cap"));
1692
		if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
1693
			cFYI(1,("POSIX path cap"));
1694
		if (cap & CIFS_UNIX_XATTR_CAP)
1695
			cFYI(1,("XATTR cap"));
1696
		if (cap & CIFS_UNIX_POSIX_ACL_CAP)
1697
			cFYI(1,("POSIX ACL cap"));
1698 1699 1700 1701
		if (cap & CIFS_UNIX_LARGE_READ_CAP)
			cFYI(1,("very large read cap"));
		if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
			cFYI(1,("very large write cap"));
1702 1703 1704 1705 1706 1707 1708
#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);
1733
		kfree(volume_info.prepath);
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1734 1735 1736 1737
		FreeXid(xid);
		return -EINVAL;
	}

1738 1739 1740 1741
	if (volume_info.nullauth) {
		cFYI(1,("null user"));
		volume_info.username = NULL;
	} else if (volume_info.username) {
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Linus Torvalds 已提交
1742 1743 1744
		/* BB fixme parse for domain name here */
		cFYI(1, ("Username: %s ", volume_info.username));
	} else {
1745
		cifserror("No username specified");
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1746 1747
        /* In userspace mount helper we can get user name from alternate
           locations such as env variables and files on disk */
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1748 1749
		kfree(volume_info.UNC);
		kfree(volume_info.password);
1750
		kfree(volume_info.prepath);
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1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768
		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);
1771
			kfree(volume_info.prepath);
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1772 1773 1774 1775 1776 1777 1778 1779 1780 1781
			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);
1784
		kfree(volume_info.prepath);
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1785 1786 1787 1788
		FreeXid(xid);
		return -EINVAL;
	} else /* which servers DFS root would we conect to */ {
		cERROR(1,
1789
		       ("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);
1792
		kfree(volume_info.prepath);
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1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804
		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);
1807
			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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Steve French 已提交
1817 1818
	else if(address_type == AF_INET6) {
		cFYI(1,("looking for ipv6 address"));
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1819 1820 1821
		existingCifsSes = cifs_find_tcp_session(NULL /* no ipv4 addr */,
			&sin_server6.sin6_addr,
			volume_info.username, &srvTcp);
S
Steve French 已提交
1822
	} else {
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Jesper Juhl 已提交
1823 1824
		kfree(volume_info.UNC);
		kfree(volume_info.password);
1825
		kfree(volume_info.prepath);
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1826 1827 1828 1829 1830 1831
		FreeXid(xid);
		return -EINVAL;
	}


	if (srvTcp) {
1832
		cFYI(1, ("Existing tcp session with server found"));                
L
Linus Torvalds 已提交
1833
	} else {	/* create socket */
1834
		if (volume_info.port)
L
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1835 1836 1837
			sin_server.sin_port = htons(volume_info.port);
		else
			sin_server.sin_port = 0;
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1838 1839 1840 1841 1842 1843 1844
		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,
1845 1846
				  volume_info.source_rfc1001_name,
				  volume_info.target_rfc1001_name);
L
Linus Torvalds 已提交
1847 1848
		if (rc < 0) {
			cERROR(1,
S
Steve French 已提交
1849
			       ("Error connecting to IPv4 socket. Aborting operation"));			       
1850
			if (csocket != NULL)
L
Linus Torvalds 已提交
1851
				sock_release(csocket);
J
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1852 1853
			kfree(volume_info.UNC);
			kfree(volume_info.password);
1854
			kfree(volume_info.prepath);
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Linus Torvalds 已提交
1855 1856 1857 1858 1859 1860 1861 1862
			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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1863 1864
			kfree(volume_info.UNC);
			kfree(volume_info.password);
1865
			kfree(volume_info.prepath);
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Linus Torvalds 已提交
1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882
			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);
1883
			srvTcp->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, srvTcp, "cifsd");
1884
			if ( IS_ERR(srvTcp->tsk) ) {
1885 1886 1887
				rc = PTR_ERR(srvTcp->tsk);
				cERROR(1,("error %d create cifsd thread", rc));
				srvTcp->tsk = NULL;
L
Linus Torvalds 已提交
1888
				sock_release(csocket);
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1889 1890
				kfree(volume_info.UNC);
				kfree(volume_info.password);
1891
				kfree(volume_info.prepath);
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Linus Torvalds 已提交
1892 1893
				FreeXid(xid);
				return rc;
1894 1895 1896
			}
			wait_for_completion(&cifsd_complete);
			rc = 0;
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Linus Torvalds 已提交
1897
			memcpy(srvTcp->workstation_RFC1001_name, volume_info.source_rfc1001_name,16);
1898
			memcpy(srvTcp->server_RFC1001_name, volume_info.target_rfc1001_name,16);
1899
			srvTcp->sequence_number = 0;
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1900 1901 1902 1903 1904
		}
	}

	if (existingCifsSes) {
		pSesInfo = existingCifsSes;
1905
		cFYI(1, ("Existing smb sess found"));
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Jesper Juhl 已提交
1906
		kfree(volume_info.password);
L
Linus Torvalds 已提交
1907 1908
		/* volume_info.UNC freed at end of function */
	} else if (!rc) {
1909
		cFYI(1, ("Existing smb sess not found"));
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1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925
		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);
1926 1927 1928 1929
			if (volume_info.domainname) {
				int len = strlen(volume_info.domainname);
				pSesInfo->domainName = 
					kmalloc(len + 1, GFP_KERNEL);
1930
				if (pSesInfo->domainName)
1931 1932 1933
					strcpy(pSesInfo->domainName,
						volume_info.domainname);
			}
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1934
			pSesInfo->linux_uid = volume_info.linux_uid;
1935
			pSesInfo->overrideSecFlg = volume_info.secFlg;
L
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1936
			down(&pSesInfo->sesSem);
1937
			/* BB FIXME need to pass vol->secFlgs BB */
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1938 1939
			rc = cifs_setup_session(xid,pSesInfo, cifs_sb->local_nls);
			up(&pSesInfo->sesSem);
1940
			if (!rc)
L
Linus Torvalds 已提交
1941 1942
				atomic_inc(&srvTcp->socketUseCount);
		} else
J
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1943
			kfree(volume_info.password);
L
Linus Torvalds 已提交
1944 1945 1946 1947
	}
    
	/* search for existing tcon to this server share */
	if (!rc) {
1948
		if (volume_info.rsize > CIFSMaxBufSize) {
1949 1950 1951
			cERROR(1,("rsize %d too large, using MaxBufSize",
				volume_info.rsize));
			cifs_sb->rsize = CIFSMaxBufSize;
1952 1953
		} else if ((volume_info.rsize) &&
				(volume_info.rsize <= CIFSMaxBufSize))
L
Linus Torvalds 已提交
1954
			cifs_sb->rsize = volume_info.rsize;
1955 1956 1957
		else /* default */
			cifs_sb->rsize = CIFSMaxBufSize;

1958
		if (volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
1959
			cERROR(1,("wsize %d too large, using 4096 instead",
1960 1961
				  volume_info.wsize));
			cifs_sb->wsize = 4096;
1962
		} else if (volume_info.wsize)
L
Linus Torvalds 已提交
1963 1964
			cifs_sb->wsize = volume_info.wsize;
		else
1965
			cifs_sb->wsize = 
S
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1966 1967
				min_t(const int, PAGEVEC_SIZE * PAGE_CACHE_SIZE,
					127*1024);
1968 1969 1970 1971 1972 1973 1974
			/* 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  */

1975
		if (cifs_sb->rsize < 2048) {
1976 1977
			cifs_sb->rsize = 2048; 
			/* Windows ME may prefer this */
1978
			cFYI(1,("readsize set to minimum: 2048"));
L
Linus Torvalds 已提交
1979
		}
1980 1981
		/* calculate prepath */
		cifs_sb->prepath = volume_info.prepath;
1982
		if (cifs_sb->prepath) {
1983 1984 1985 1986 1987
			cifs_sb->prepathlen = strlen(cifs_sb->prepath);
			cifs_sb->prepath[0] = CIFS_DIR_SEP(cifs_sb);
			volume_info.prepath = NULL;
		} else 
			cifs_sb->prepathlen = 0;
L
Linus Torvalds 已提交
1988 1989 1990 1991
		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;
1992 1993
		cFYI(1,("file mode: 0x%x  dir mode: 0x%x",
			cifs_sb->mnt_file_mode,cifs_sb->mnt_dir_mode));
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Linus Torvalds 已提交
1994

1995
		if (volume_info.noperm)
L
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1996
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM;
1997
		if (volume_info.setuids)
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1998
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID;
1999
		if (volume_info.server_ino)
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2000
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM;
2001
		if (volume_info.remap)
2002
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR;
2003
		if (volume_info.no_xattr)
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Linus Torvalds 已提交
2004
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR;
2005
		if (volume_info.sfu_emul)
2006
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
2007
		if (volume_info.nobrl)
2008
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
2009
		if (volume_info.cifs_acl)
2010
			cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL;
2011 2012 2013 2014 2015
		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) {
2016
			cFYI(1,("mounting share using direct i/o"));
L
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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) {
2024
			cFYI(1, ("Found match on UNC path"));
L
Linus Torvalds 已提交
2025 2026 2027 2028 2029
			/* 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;
2030
			tcon->nocase = volume_info.nocase;
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2031 2032 2033 2034 2035
		} else {
			tcon = tconInfoAlloc();
			if (tcon == NULL)
				rc = -ENOMEM;
			else {
2036 2037
				/* check for null share name ie connecting to 
				 * dfs root */
L
Linus Torvalds 已提交
2038

2039 2040
				/* BB check if this works for exactly length 
				 * three strings */
L
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2041 2042 2043
				if ((strchr(volume_info.UNC + 3, '\\') == NULL)
				    && (strchr(volume_info.UNC + 3, '/') ==
					NULL)) {
2044
					rc = connect_to_dfs_path(xid, pSesInfo,
2045 2046 2047
						"", cifs_sb->local_nls,
						cifs_sb->mnt_cifs_flags & 
						  CIFS_MOUNT_MAP_SPECIAL_CHR);
J
Jesper Juhl 已提交
2048
					kfree(volume_info.UNC);
L
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2049 2050 2051
					FreeXid(xid);
					return -ENODEV;
				} else {
2052 2053 2054
					/* BB Do we need to wrap sesSem around
					 * this TCon call and Unix SetFS as
					 * we do on SessSetup and reconnect? */
L
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2055 2056 2057 2058 2059 2060 2061 2062
					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;
2063
					tcon->nocase = volume_info.nocase;
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				}
			}
		}
	}
2068
	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 */
	}

2075
	/* 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 */
2082
		if (atomic_read(&srvTcp->socketUseCount) == 0) {
L
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			spin_lock(&GlobalMid_Lock);
			srvTcp->tcpStatus = CifsExiting;
			spin_unlock(&GlobalMid_Lock);
2086
			if (srvTcp->tsk) {
2087 2088 2089 2090 2091
				struct task_struct *tsk;
				/* If we could verify that kthread_stop would
				   always wake up processes blocked in
				   tcp in recv_mesg then we could remove the
				   send_sig call */
L
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				send_sig(SIGKILL,srvTcp->tsk,1);
2093 2094
				tsk = srvTcp->tsk;
				if(tsk)
S
Steve French 已提交
2095
					kthread_stop(tsk);
2096
			}
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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 */
2108
					if ((temp_rc == -ESHUTDOWN) &&
2109
					   (pSesInfo->server) && (pSesInfo->server->tsk)) {
2110
						struct task_struct *tsk;
L
Linus Torvalds 已提交
2111
						send_sig(SIGKILL,pSesInfo->server->tsk,1);
2112
						tsk = pSesInfo->server->tsk;
S
Steve French 已提交
2113
						if (tsk)
2114
							kthread_stop(tsk);
2115
					}
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2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126
				} else
					cFYI(1, ("No session or bad tcon"));
				sesInfoFree(pSesInfo);
				/* pSesInfo = NULL; */
			}
		}
	} else {
		atomic_inc(&tcon->useCount);
		cifs_sb->tcon = tcon;
		tcon->ses = pSesInfo;

2127
		/* do not care if following two calls succeed - informational */
2128 2129
		CIFSSMBQFSDeviceInfo(xid, tcon);
		CIFSSMBQFSAttributeInfo(xid, tcon);
2130 2131 2132 2133
		
		/* tell server which Unix caps we support */
		if (tcon->ses->capabilities & CAP_UNIX)
			reset_cifs_unix_caps(xid, tcon, sb, &volume_info);
2134 2135 2136 2137 2138 2139 2140
		else if(cifs_sb->rsize > (1024 * 127)) {
			cifs_sb->rsize = 1024 * 127;
#ifdef CONFIG_CIFS_DEBUG2
			cFYI(1,("no very large read support, rsize 127K"));
#endif
			
		}
2141 2142 2143 2144
		if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
			cifs_sb->wsize = min(cifs_sb->wsize,
					     (tcon->ses->server->maxBuf -
					      MAX_CIFS_HDR_SIZE));
2145 2146 2147 2148
		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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2149 2150 2151 2152 2153 2154
	}

	/* volume_info.password is freed above when existing session found
	(in which case it is not needed anymore) but when new sesion is created
	the password ptr is put in the new session structure (in which case the
	password will be freed at unmount time) */
J
Jesper Juhl 已提交
2155
	kfree(volume_info.UNC);
2156
	kfree(volume_info.prepath);
L
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2157 2158 2159 2160 2161 2162
	FreeXid(xid);
	return rc;
}

static int
CIFSSessSetup(unsigned int xid, struct cifsSesInfo *ses,
2163
	      char session_key[CIFS_SESS_KEY_SIZE],
L
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2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179
	      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;

2180
	cFYI(1, ("In sesssetup"));
2181
	if (ses == NULL)
L
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2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195
		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 */ );

2196
	smb_buffer->Mid = GetNextMid(ses->server);
L
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2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220
	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 = 
2221
		cpu_to_le16(CIFS_SESS_KEY_SIZE);
L
Linus Torvalds 已提交
2222 2223

	pSMB->req_no_secext.CaseSensitivePasswordLength =
2224
	    cpu_to_le16(CIFS_SESS_KEY_SIZE);
L
Linus Torvalds 已提交
2225
	bcc_ptr = pByteArea(smb_buffer);
2226 2227 2228 2229
	memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
	bcc_ptr += CIFS_SESS_KEY_SIZE;
	memcpy(bcc_ptr, (char *) session_key, CIFS_SESS_KEY_SIZE);
	bcc_ptr += CIFS_SESS_KEY_SIZE;
L
Linus Torvalds 已提交
2230 2231 2232 2233 2234 2235

	if (ses->capabilities & CAP_UNICODE) {
		if ((long) bcc_ptr % 2) { /* must be word aligned for Unicode */
			*bcc_ptr = 0;
			bcc_ptr++;
		}
2236
		if (user == NULL)
2237
			bytes_returned = 0; /* skip null user */
L
Linus Torvalds 已提交
2238 2239
	        else
			bytes_returned =
2240
			        cifs_strtoUCS((__le16 *) bcc_ptr, user, 100,
L
Linus Torvalds 已提交
2241 2242 2243 2244 2245 2246
					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 =
2247
			    cifs_strtoUCS((__le16 *) bcc_ptr,
L
Linus Torvalds 已提交
2248 2249 2250
					  "CIFS_LINUX_DOM", 32, nls_codepage);
		else
			bytes_returned =
2251
			    cifs_strtoUCS((__le16 *) bcc_ptr, domain, 64,
L
Linus Torvalds 已提交
2252 2253 2254 2255
					  nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;
		bytes_returned =
2256
		    cifs_strtoUCS((__le16 *) bcc_ptr, "Linux version ",
L
Linus Torvalds 已提交
2257 2258 2259
				  32, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bytes_returned =
2260
		    cifs_strtoUCS((__le16 *) bcc_ptr, utsname()->release,
L
Linus Torvalds 已提交
2261 2262 2263 2264
				  32, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;
		bytes_returned =
2265
		    cifs_strtoUCS((__le16 *) bcc_ptr, CIFS_NETWORK_OPSYS,
L
Linus Torvalds 已提交
2266 2267 2268 2269
				  64, nls_codepage);
		bcc_ptr += 2 * bytes_returned;
		bcc_ptr += 2;
	} else {
2270
		if (user != NULL) {                
L
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2271 2272 2273 2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286
		    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 ");
2287 2288
		strcpy(bcc_ptr, utsname()->release);
		bcc_ptr += strlen(utsname()->release) + 1;
L
Linus Torvalds 已提交
2289 2290 2291 2292 2293 2294 2295 2296 2297 2298 2299 2300 2301 2302 2303 2304 2305 2306 2307 2308 2309 2310 2311 2312 2313 2314 2315 2316 2317 2318 2319 2320 2321 2322 2323 2324 2325 2326 2327 2328 2329 2330
		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  */
2331 2332
				if(ses->serverOS)
					kfree(ses->serverOS);
2333
				ses->serverOS = kzalloc(2 * (len + 1), GFP_KERNEL);
2334 2335
				if(ses->serverOS == NULL)
					goto sesssetup_nomem;
L
Linus Torvalds 已提交
2336
				cifs_strfromUCS_le(ses->serverOS,
2337
					   (__le16 *)bcc_ptr, len,nls_codepage);
L
Linus Torvalds 已提交
2338 2339 2340 2341 2342 2343 2344
				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);
2345
					kfree(ses->serverNOS);
2346
					ses->serverNOS = kzalloc(2 * (len + 1),GFP_KERNEL);
2347 2348
					if(ses->serverNOS == NULL)
						goto sesssetup_nomem;
L
Linus Torvalds 已提交
2349
					cifs_strfromUCS_le(ses->serverNOS,
2350
							   (__le16 *)bcc_ptr,len,nls_codepage);
L
Linus Torvalds 已提交
2351 2352 2353 2354 2355 2356 2357 2358 2359 2360
					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) {
2361
						len = UniStrnlen((wchar_t *) bcc_ptr, remaining_words);
L
Linus Torvalds 已提交
2362
          /* last string is not always null terminated (for e.g. for Windows XP & 2000) */
2363 2364
						if(ses->serverDomain)
							kfree(ses->serverDomain);
L
Linus Torvalds 已提交
2365
						ses->serverDomain =
2366
						    kzalloc(2*(len+1),GFP_KERNEL);
2367 2368
						if(ses->serverDomain == NULL)
							goto sesssetup_nomem;
L
Linus Torvalds 已提交
2369
						cifs_strfromUCS_le(ses->serverDomain,
2370
						     (__le16 *)bcc_ptr,len,nls_codepage);
L
Linus Torvalds 已提交
2371 2372 2373 2374
						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 */
2375 2376 2377
					else {
						if(ses->serverDomain)
							kfree(ses->serverDomain);
2378
						ses->serverDomain = 
2379
							kzalloc(2, GFP_KERNEL);
2380
					}
L
Linus Torvalds 已提交
2381
				} else {	/* no room so create dummy domain and NOS string */
2382 2383 2384
					/* if these kcallocs fail not much we
					   can do, but better to not fail the
					   sesssetup itself */
2385
					kfree(ses->serverDomain);
L
Linus Torvalds 已提交
2386
					ses->serverDomain =
2387
					    kzalloc(2, GFP_KERNEL);
2388
					kfree(ses->serverNOS);
L
Linus Torvalds 已提交
2389
					ses->serverNOS =
2390
					    kzalloc(2, GFP_KERNEL);
L
Linus Torvalds 已提交
2391 2392 2393 2394 2395 2396
				}
			} else {	/* ASCII */
				len = strnlen(bcc_ptr, 1024);
				if (((long) bcc_ptr + len) - (long)
				    pByteArea(smb_buffer_response)
					    <= BCC(smb_buffer_response)) {
2397
					kfree(ses->serverOS);
2398
					ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
2399 2400
					if(ses->serverOS == NULL)
						goto sesssetup_nomem;
L
Linus Torvalds 已提交
2401 2402 2403 2404 2405 2406 2407
					strncpy(ses->serverOS,bcc_ptr, len);

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

					len = strnlen(bcc_ptr, 1024);
2408
					kfree(ses->serverNOS);
2409
					ses->serverNOS = kzalloc(len + 1,GFP_KERNEL);
2410 2411
					if(ses->serverNOS == NULL)
						goto sesssetup_nomem;
L
Linus Torvalds 已提交
2412 2413 2414 2415 2416 2417
					strncpy(ses->serverNOS, bcc_ptr, len);
					bcc_ptr += len;
					bcc_ptr[0] = 0;
					bcc_ptr++;

					len = strnlen(bcc_ptr, 1024);
2418 2419
					if(ses->serverDomain)
						kfree(ses->serverDomain);
2420
					ses->serverDomain = kzalloc(len + 1,GFP_KERNEL);
2421 2422
					if(ses->serverDomain == NULL)
						goto sesssetup_nomem;
L
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2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438 2439 2440 2441
					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;
	}
2442 2443 2444
sesssetup_nomem:	/* do not return an error on nomem for the info strings,
			   since that could make reconnection harder, and
			   reconnection might be needed to free memory */
L
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2445 2446 2447 2448 2449 2450 2451 2452 2453 2454 2455 2456 2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470 2471
	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;

2472
	cFYI(1, ("In NTLMSSP sesssetup (negotiate)"));
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	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 */ );
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	smb_buffer->Mid = GetNextMid(ses->server);
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	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;

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	/* 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 =
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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 terminate Linux version */
		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 */
		strcpy(bcc_ptr, "Linux version ");
		bcc_ptr += strlen("Linux version ");
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		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,
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							   (__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 =
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							    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 */
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						else {
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							kfree(ses->serverDomain);
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							ses->serverDomain =
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							    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 =
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	    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);
		}

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		/* 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 =
2943
		    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 =
2948
		    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 ");
2995 2996
		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++;	/* 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  */
3058
					if(ses->serverOS)
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3059
						kfree(ses->serverOS);
L
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3060
					ses->serverOS =
3061
					    kzalloc(2 * (len + 1), GFP_KERNEL);
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					cifs_strfromUCS_le(ses->serverOS,
3063
							   (__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);
3075
						kfree(ses->serverNOS);
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						ses->serverNOS =
3077
						    kzalloc(2 * (len + 1),
L
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3078 3079 3080
							    GFP_KERNEL);
						cifs_strfromUCS_le(ses->
								   serverNOS,
3081
								   (__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 not always null terminated (e.g. for Windows XP & 2000) */
3092 3093
							if(ses->serverDomain)
								kfree(ses->serverDomain);
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							ses->serverDomain =
3095
							    kzalloc(2 *
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3096 3097 3098 3099 3100 3101
								    (len +
								     1),
								    GFP_KERNEL);
							cifs_strfromUCS_le
							    (ses->
							     serverDomain,
3102
							     (__le16 *)
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3103 3104 3105 3106 3107 3108 3109 3110 3111 3112 3113 3114 3115 3116 3117 3118
							     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 */
3119 3120 3121
						else {
							if(ses->serverDomain)
								kfree(ses->serverDomain);
3122
							ses->serverDomain = kzalloc(2,GFP_KERNEL);
3123
						}
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3124
					} else {  /* no room so create dummy domain and NOS string */
3125 3126
						if(ses->serverDomain)
							kfree(ses->serverDomain);
3127
						ses->serverDomain = kzalloc(2, GFP_KERNEL);
3128
						kfree(ses->serverNOS);
3129
						ses->serverNOS = 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)) {
3136 3137
						if(ses->serverOS)
							kfree(ses->serverOS);
3138
						ses->serverOS = kzalloc(len + 1,GFP_KERNEL);
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3139 3140 3141 3142 3143 3144 3145
						strncpy(ses->serverOS,bcc_ptr, len);

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

						len = strnlen(bcc_ptr, 1024);
3146
						kfree(ses->serverNOS);
3147
						ses->serverNOS = kzalloc(len+1,GFP_KERNEL);
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						strncpy(ses->serverNOS, bcc_ptr, len);	
						bcc_ptr += len;
						bcc_ptr[0] = 0;
						bcc_ptr++;

						len = strnlen(bcc_ptr, 1024);
3154 3155
						if(ses->serverDomain)
							kfree(ses->serverDomain);
3156
						ses->serverDomain = kzalloc(len+1,GFP_KERNEL);
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						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 */ );
3211 3212

	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];
3220 3221
	if((ses->server->secMode) & SECMODE_USER) {
		pSMB->PasswordLength = cpu_to_le16(1);	/* minimum */
3222
		*bcc_ptr = 0; /* password is null byte */
3223
		bcc_ptr++;              /* skip password */
3224
		/* already aligned so no need to do it below */
3225
	} else {
3226
		pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE);
3227 3228 3229
		/* 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
3230
		   weaker LANMAN (which we do not send by default) is accepted
3231 3232
		   by Samba (not sure whether other servers allow
		   NTLMv2 password here) */
3233 3234 3235 3236 3237 3238
#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 */
3239 3240 3241 3242
		SMBNTencrypt(ses->password,
			     ses->server->cryptKey,
			     bcc_ptr);

3243 3244 3245 3246 3247 3248
		bcc_ptr += CIFS_SESS_KEY_SIZE;
		if(ses->capabilities & CAP_UNICODE) {
			/* must align unicode strings */
			*bcc_ptr = 0; /* null byte password */
			bcc_ptr++;
		}
3249
	}
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3251 3252
	if(ses->server->secMode & 
			(SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
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3253 3254 3255 3256 3257 3258 3259 3260 3261 3262 3263
		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 =
3264 3265 3266 3267
		    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 */
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		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)) {
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Jesper Juhl 已提交
3297
				kfree(tcon->nativeFileSystem);
L
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3298
				tcon->nativeFileSystem =
3299
				    kzalloc(length + 2, GFP_KERNEL);
L
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				cifs_strfromUCS_le(tcon->nativeFileSystem,
3301
						   (__le16 *) bcc_ptr,
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						   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
3314
				kfree(tcon->nativeFileSystem);
L
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3315
				tcon->nativeFileSystem =
3316
				    kzalloc(length + 1, GFP_KERNEL);
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3317 3318 3319 3320 3321
				strncpy(tcon->nativeFileSystem, bcc_ptr,
					length);
			}
			/* else do not bother copying these informational fields */
		}
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3322 3323 3324
		if((smb_buffer_response->WordCount == 3) ||
			 (smb_buffer_response->WordCount == 7))
			/* field is in same location */
3325 3326 3327
			tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport);
		else
			tcon->Flags = 0;
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		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;
3346
	char * tmp;
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	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"));
S
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3368
				if (cifsd_task) {
L
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3369
					send_sig(SIGKILL,cifsd_task,1);
3370
					kthread_stop(cifsd_task);
3371
				}
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3372 3373 3374 3375 3376 3377 3378 3379
				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;
3380 3381 3382 3383
	tmp = cifs_sb->prepath;
	cifs_sb->prepathlen = 0;
	cifs_sb->prepath = NULL;
	kfree(tmp);
3384 3385
	if (ses)
		schedule_timeout_interruptible(msecs_to_jiffies(500));
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3386 3387 3388 3389 3390 3391 3392 3393 3394 3395 3396
	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;
3397
	char ntlm_session_key[CIFS_SESS_KEY_SIZE];
L
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3398
	int ntlmv2_flag = FALSE;
3399
	int first_time = 0;
L
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3400 3401 3402 3403 3404 3405 3406 3407 3408 3409 3410 3411 3412 3413 3414 3415 3416 3417

	/* 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);

		}
3418
		first_time = 1;
L
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3419 3420
	}
	if (!rc) {
3421
		pSesInfo->flags = 0;
L
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3422 3423 3424
		pSesInfo->capabilities = pSesInfo->server->capabilities;
		if(linuxExtEnabled == 0)
			pSesInfo->capabilities &= (~CAP_UNIX);
3425
	/*	pSesInfo->sequence_number = 0;*/
3426
		cFYI(1,("Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d",
L
Linus Torvalds 已提交
3427 3428
			pSesInfo->server->secMode,
			pSesInfo->server->capabilities,
3429
			pSesInfo->server->timeAdj));
3430
		if(experimEnabled < 2)
3431 3432
			rc = CIFS_SessSetup(xid, pSesInfo,
					    first_time, nls_info);
3433
		else if (extended_security
3434 3435
				&& (pSesInfo->capabilities 
					& CAP_EXTENDED_SECURITY)
L
Linus Torvalds 已提交
3436
				&& (pSesInfo->server->secType == NTLMSSP)) {
3437
			rc = -EOPNOTSUPP;
L
Linus Torvalds 已提交
3438 3439 3440
		} else if (extended_security
			   && (pSesInfo->capabilities & CAP_EXTENDED_SECURITY)
			   && (pSesInfo->server->secType == RawNTLMSSP)) {
3441
			cFYI(1, ("NTLMSSP sesssetup"));
L
Linus Torvalds 已提交
3442 3443 3444 3445 3446 3447 3448
			rc = CIFSNTLMSSPNegotiateSessSetup(xid,
						pSesInfo,
						&ntlmv2_flag,
						nls_info);
			if (!rc) {
				if(ntlmv2_flag) {
					char * v2_response;
3449
					cFYI(1,("more secure NTLM ver2 hash"));
L
Linus Torvalds 已提交
3450 3451 3452 3453 3454 3455 3456 3457
					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);
3458 3459 3460 3461
				/*		if(first_time)
							cifs_calculate_ntlmv2_mac_key(
							  pSesInfo->server->mac_signing_key, 
							  response, ntlm_session_key, */
L
Linus Torvalds 已提交
3462 3463 3464 3465 3466 3467 3468 3469 3470 3471 3472 3473
						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);

3474 3475 3476 3477 3478
					if(first_time)
						cifs_calculate_mac_key(
							pSesInfo->server->mac_signing_key,
							ntlm_session_key,
							pSesInfo->password);
L
Linus Torvalds 已提交
3479 3480 3481 3482 3483 3484 3485 3486 3487 3488 3489 3490 3491 3492 3493
				}
			/* 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);

3494 3495 3496 3497 3498
			if(first_time) 		
				cifs_calculate_mac_key(
					pSesInfo->server->mac_signing_key,
					ntlm_session_key, pSesInfo->password);

L
Linus Torvalds 已提交
3499 3500 3501 3502 3503 3504 3505 3506 3507 3508 3509 3510 3511 3512
			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;
}