Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
  [CIFS] Do not send Query All EAs SMB when mount option nouser_xattr
  [CIFS] endian errors in lanman protocol support
  [CIFS] Fix oops in cifs_close due to unitialized lock sem and list in
  [CIFS] Fix oops when negotiating lanman and no password specified
  [CIFS]
  [CIFS] Allow cifsd to suspend if connection is lost
  [CIFS] Make midState usage more consistent
  [CIFS] spinlock protect read of last srv response time in timeout path
  [CIFS] Do not time out posix brl requests when using new posix setfileinfo

fs/cifs/CHANGES

+Version 1.45
+------------
+Do not time out lockw calls when using posix extensions. Do not
+time out requests if server still responding reasonably fast
+on requests on other threads.  Improve POSIX locking emulation,
+(lock cancel now works, and unlock of merged range works even
+to Windows servers now).  Fix oops on mount to lanman servers
+(win9x, os/2 etc.) when null password.  Do not send listxattr
+(SMB to query all EAs) if nouser_xattr specified.
+
 Version 1.44
 ------------
 Rewritten sessionsetup support, including support for legacy SMB

fs/cifs/README

@@ -408,7 +408,7 @@ A partial list of the supported mount options follows:
   user_xattr    Allow getting and setting user xattrs as OS/2 EAs (extended
 		attributes) to the server (default) e.g. via setfattr 
 		and getfattr utilities. 
-  nouser_xattr  Do not allow getfattr/setfattr to get/set xattrs 
+  nouser_xattr  Do not allow getfattr/setfattr to get/set/list xattrs 
   mapchars      Translate six of the seven reserved characters (not backslash)
 			*?<>|:
 		to the remap range (above 0xF000), which also

fs/cifs/cifsencrypt.c

@@ -277,7 +277,8 @@ void calc_lanman_hash(struct cifsSesInfo * ses, char * lnm_session_key)
 		return;
 
 	memset(password_with_pad, 0, CIFS_ENCPWD_SIZE);
-	strncpy(password_with_pad, ses->password, CIFS_ENCPWD_SIZE);
+	if(ses->password)
+		strncpy(password_with_pad, ses->password, CIFS_ENCPWD_SIZE);
 
 	if((ses->server->secMode & SECMODE_PW_ENCRYPT) == 0)
 		if(extended_security & CIFSSEC_MAY_PLNTXT) {

fs/cifs/cifsfs.c

@@ -402,7 +402,6 @@ static struct quotactl_ops cifs_quotactl_ops = {
 };
 #endif
 
-#ifdef CONFIG_CIFS_EXPERIMENTAL
 static void cifs_umount_begin(struct vfsmount * vfsmnt, int flags)
 {
 	struct cifs_sb_info *cifs_sb;
@@ -422,7 +421,7 @@ static void cifs_umount_begin(struct vfsmount * vfsmnt, int flags)
 		tcon->tidStatus = CifsExiting;
 	up(&tcon->tconSem);
 
-	/* cancel_brl_requests(tcon); */
+	/* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */
 	/* cancel_notify_requests(tcon); */
 	if(tcon->ses && tcon->ses->server)
 	{
@@ -438,7 +437,6 @@ static void cifs_umount_begin(struct vfsmount * vfsmnt, int flags)
 
 	return;
 }
-#endif	
 
 static int cifs_remount(struct super_block *sb, int *flags, char *data)
 {
@@ -457,9 +455,7 @@ struct super_operations cifs_super_ops = {
    unless later we add lazy close of inodes or unless the kernel forgets to call
    us with the same number of releases (closes) as opens */
 	.show_options = cifs_show_options,
-#ifdef CONFIG_CIFS_EXPERIMENTAL
 	.umount_begin   = cifs_umount_begin,
-#endif
 	.remount_fs = cifs_remount,
 };
 

fs/cifs/cifsfs.h

@@ -100,5 +100,5 @@ extern ssize_t	cifs_getxattr(struct dentry *, const char *, void *, size_t);
 extern ssize_t	cifs_listxattr(struct dentry *, char *, size_t);
 extern int cifs_ioctl (struct inode * inode, struct file * filep,
 		       unsigned int command, unsigned long arg);
-#define CIFS_VERSION   "1.44"
+#define CIFS_VERSION   "1.45"
 #endif				/* _CIFSFS_H */

fs/cifs/cifsglob.h

@@ -3,6 +3,7 @@
  *
  *   Copyright (C) International Business Machines  Corp., 2002,2006
  *   Author(s): Steve French (sfrench@us.ibm.com)
+ *              Jeremy Allison (jra@samba.org)
  *
  *   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
@@ -158,7 +159,8 @@ struct TCP_Server_Info {
 	/* 16th byte of RFC1001 workstation name is always null */
 	char workstation_RFC1001_name[SERVER_NAME_LEN_WITH_NULL];
 	__u32 sequence_number; /* needed for CIFS PDU signature */
-	char mac_signing_key[CIFS_SESS_KEY_SIZE + 16]; 
+	char mac_signing_key[CIFS_SESS_KEY_SIZE + 16];
+	unsigned long lstrp; /* when we got last response from this server */
 };
 
 /*
@@ -266,14 +268,14 @@ struct cifsTconInfo {
 };
 
 /*
- * This info hangs off the cifsFileInfo structure.  This is used to track
- * byte stream locks on the file
+ * This info hangs off the cifsFileInfo structure, pointed to by llist.
+ * This is used to track byte stream locks on the file
  */
 struct cifsLockInfo {
-	struct cifsLockInfo *next;
-	int start;
-	int length;
-	int type;
+	struct list_head llist;	/* pointer to next cifsLockInfo */
+	__u64 offset;
+	__u64 length;
+	__u8 type;
 };
 
 /*
@@ -304,6 +306,8 @@ struct cifsFileInfo {
 	/* lock scope id (0 if none) */
 	struct file * pfile; /* needed for writepage */
 	struct inode * pInode; /* needed for oplock break */
+	struct semaphore lock_sem;
+	struct list_head llist; /* list of byte range locks we have. */
 	unsigned closePend:1;	/* file is marked to close */
 	unsigned invalidHandle:1;  /* file closed via session abend */
 	atomic_t wrtPending;   /* handle in use - defer close */

fs/cifs/cifsproto.h

@@ -50,6 +50,10 @@ extern int SendReceive(const unsigned int /* xid */ , struct cifsSesInfo *,
 extern int SendReceive2(const unsigned int /* xid */ , struct cifsSesInfo *,
 			struct kvec *, int /* nvec to send */, 
 			int * /* type of buf returned */ , const int long_op);
+extern int SendReceiveBlockingLock(const unsigned int /* xid */ , struct cifsTconInfo *,
+				struct smb_hdr * /* input */ ,
+				struct smb_hdr * /* out */ ,
+				int * /* bytes returned */);
 extern int checkSMBhdr(struct smb_hdr *smb, __u16 mid);
 extern int checkSMB(struct smb_hdr *smb, __u16 mid, int length);
 extern int is_valid_oplock_break(struct smb_hdr *smb, struct TCP_Server_Info *);

fs/cifs/cifssmb.c

@@ -477,7 +477,7 @@ CIFSSMBNegotiate(unsigned int xid, struct cifsSesInfo *ses)
 		/* BB get server time for time conversions and add
 		code to use it and timezone since this is not UTC */	
 
-		if (rsp->EncryptionKeyLength == CIFS_CRYPTO_KEY_SIZE) {
+		if (rsp->EncryptionKeyLength == cpu_to_le16(CIFS_CRYPTO_KEY_SIZE)) {
 			memcpy(server->cryptKey, rsp->EncryptionKey,
 				CIFS_CRYPTO_KEY_SIZE);
 		} else if (server->secMode & SECMODE_PW_ENCRYPT) {
@@ -1460,8 +1460,13 @@ CIFSSMBLock(const int xid, struct cifsTconInfo *tcon,
 	pSMB->hdr.smb_buf_length += count;
 	pSMB->ByteCount = cpu_to_le16(count);
 
-	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+	if (waitFlag) {
+		rc = SendReceiveBlockingLock(xid, tcon, (struct smb_hdr *) pSMB,
+			(struct smb_hdr *) pSMBr, &bytes_returned);
+	} else {
+		rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
 			 (struct smb_hdr *) pSMBr, &bytes_returned, timeout);
+	}
 	cifs_stats_inc(&tcon->num_locks);
 	if (rc) {
 		cFYI(1, ("Send error in Lock = %d", rc));
@@ -1484,6 +1489,7 @@ CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon,
 	char *data_offset;
 	struct cifs_posix_lock *parm_data;
 	int rc = 0;
+	int timeout = 0;
 	int bytes_returned = 0;
 	__u16 params, param_offset, offset, byte_count, count;
 
@@ -1503,7 +1509,6 @@ CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon,
 	pSMB->MaxSetupCount = 0;
 	pSMB->Reserved = 0;
 	pSMB->Flags = 0;
-	pSMB->Timeout = 0;
 	pSMB->Reserved2 = 0;
 	param_offset = offsetof(struct smb_com_transaction2_sfi_req, Fid) - 4;
 	offset = param_offset + params;
@@ -1529,8 +1534,13 @@ CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon,
 			(((char *) &pSMB->hdr.Protocol) + offset);
 
 	parm_data->lock_type = cpu_to_le16(lock_type);
-	if(waitFlag)
+	if(waitFlag) {
+		timeout = 3;  /* blocking operation, no timeout */
 		parm_data->lock_flags = cpu_to_le16(1);
+		pSMB->Timeout = cpu_to_le32(-1);
+	} else
+		pSMB->Timeout = 0;
+
 	parm_data->pid = cpu_to_le32(current->tgid);
 	parm_data->start = cpu_to_le64(pLockData->fl_start);
 	parm_data->length = cpu_to_le64(len);  /* normalize negative numbers */
@@ -1541,8 +1551,14 @@ CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon,
 	pSMB->Reserved4 = 0;
 	pSMB->hdr.smb_buf_length += byte_count;
 	pSMB->ByteCount = cpu_to_le16(byte_count);
-	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
-			(struct smb_hdr *) pSMBr, &bytes_returned, 0);
+	if (waitFlag) {
+		rc = SendReceiveBlockingLock(xid, tcon, (struct smb_hdr *) pSMB,
+			(struct smb_hdr *) pSMBr, &bytes_returned);
+	} else {
+		rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
+			(struct smb_hdr *) pSMBr, &bytes_returned, timeout);
+	}
+
 	if (rc) {
 		cFYI(1, ("Send error in Posix Lock = %d", rc));
 	} else if (get_flag) {

fs/cifs/connect.c

@@ -182,6 +182,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
 
 	while ((server->tcpStatus != CifsExiting) && (server->tcpStatus != CifsGood))
 	{
+		try_to_freeze();
 		if(server->protocolType == IPV6) {
 			rc = ipv6_connect(&server->addr.sockAddr6,&server->ssocket);
 		} else {
@@ -612,6 +613,10 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
 #ifdef CONFIG_CIFS_STATS2
 				mid_entry->when_received = jiffies;
 #endif
+				/* so we do not time out requests to  server
+				which is still responding (since server could
+				be busy but not dead) */
+				server->lstrp = jiffies;
 				break;
 			}
 		}
@@ -1266,33 +1271,35 @@ find_unc(__be32 new_target_ip_addr, char *uncName, char *userName)
 
 	read_lock(&GlobalSMBSeslock);
 	list_for_each(tmp, &GlobalTreeConnectionList) {
-		cFYI(1, ("Next tcon - "));
+		cFYI(1, ("Next tcon"));
 		tcon = list_entry(tmp, struct cifsTconInfo, cifsConnectionList);
 		if (tcon->ses) {
 			if (tcon->ses->server) {
 				cFYI(1,
-				     (" old ip addr: %x == new ip %x ?",
+				     ("old ip addr: %x == new ip %x ?",
 				      tcon->ses->server->addr.sockAddr.sin_addr.
 				      s_addr, new_target_ip_addr));
 				if (tcon->ses->server->addr.sockAddr.sin_addr.
 				    s_addr == new_target_ip_addr) {
-	/* BB lock tcon and server and tcp session and increment use count here? */
+	/* BB lock tcon, server and tcp session and increment use count here? */
 					/* found a match on the TCP session */
 					/* BB check if reconnection needed */
-					cFYI(1,("Matched ip, old UNC: %s == new: %s ?",
+					cFYI(1,("IP match, old UNC: %s new: %s",
 					      tcon->treeName, uncName));
 					if (strncmp
 					    (tcon->treeName, uncName,
 					     MAX_TREE_SIZE) == 0) {
 						cFYI(1,
-						     ("Matched UNC, old user: %s == new: %s ?",
+						     ("and old usr: %s new: %s",
 						      tcon->treeName, uncName));
 						if (strncmp
 						    (tcon->ses->userName,
 						     userName,
 						     MAX_USERNAME_SIZE) == 0) {
 							read_unlock(&GlobalSMBSeslock);
-							return tcon;/* also matched user (smb session)*/
+							/* matched smb session
+							(user name */
+							return tcon;
 						}
 					}
 				}
@@ -1969,7 +1976,18 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
 				}
 					
 				cFYI(1,("Negotiate caps 0x%x",(int)cap));
-
+#ifdef CONFIG_CIFS_DEBUG2
+				if(cap & CIFS_UNIX_FCNTL_CAP)
+					cFYI(1,("FCNTL cap"));
+				if(cap & CIFS_UNIX_EXTATTR_CAP)
+					cFYI(1,("EXTATTR cap"));
+				if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
+					cFYI(1,("POSIX path cap"));
+				if(cap & CIFS_UNIX_XATTR_CAP)
+					cFYI(1,("XATTR cap"));
+				if(cap & CIFS_UNIX_POSIX_ACL_CAP)
+					cFYI(1,("POSIX ACL cap"));
+#endif /* CIFS_DEBUG2 */
 				if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
 					cFYI(1,("setting capabilities failed"));
 				}

fs/cifs/dir.c

@@ -267,6 +267,10 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
 			pCifsFile->invalidHandle = FALSE;
 			pCifsFile->closePend     = FALSE;
 			init_MUTEX(&pCifsFile->fh_sem);
+			init_MUTEX(&pCifsFile->lock_sem);
+			INIT_LIST_HEAD(&pCifsFile->llist);
+			atomic_set(&pCifsFile->wrtPending,0);
+
 			/* set the following in open now 
 				pCifsFile->pfile = file; */
 			write_lock(&GlobalSMBSeslock);

fs/cifs/file.c

@@ -5,6 +5,7 @@
  * 
  *   Copyright (C) International Business Machines  Corp., 2002,2003
  *   Author(s): Steve French (sfrench@us.ibm.com)
+ *              Jeremy Allison (jra@samba.org)
  *
  *   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
@@ -47,6 +48,8 @@ static inline struct cifsFileInfo *cifs_init_private(
 	private_data->netfid = netfid;
 	private_data->pid = current->tgid;	
 	init_MUTEX(&private_data->fh_sem);
+	init_MUTEX(&private_data->lock_sem);
+	INIT_LIST_HEAD(&private_data->llist);
 	private_data->pfile = file; /* needed for writepage */
 	private_data->pInode = inode;
 	private_data->invalidHandle = FALSE;
@@ -473,6 +476,8 @@ int cifs_close(struct inode *inode, struct file *file)
 	cifs_sb = CIFS_SB(inode->i_sb);
 	pTcon = cifs_sb->tcon;
 	if (pSMBFile) {
+		struct cifsLockInfo *li, *tmp;
+
 		pSMBFile->closePend = TRUE;
 		if (pTcon) {
 			/* no sense reconnecting to close a file that is
@@ -496,6 +501,16 @@ int cifs_close(struct inode *inode, struct file *file)
 						  pSMBFile->netfid);
 			}
 		}
+
+		/* Delete any outstanding lock records.
+		   We'll lose them when the file is closed anyway. */
+		down(&pSMBFile->lock_sem);
+		list_for_each_entry_safe(li, tmp, &pSMBFile->llist, llist) {
+			list_del(&li->llist);
+			kfree(li);
+		}
+		up(&pSMBFile->lock_sem);
+
 		write_lock(&GlobalSMBSeslock);
 		list_del(&pSMBFile->flist);
 		list_del(&pSMBFile->tlist);
@@ -570,6 +585,21 @@ int cifs_closedir(struct inode *inode, struct file *file)
 	return rc;
 }
 
+static int store_file_lock(struct cifsFileInfo *fid, __u64 len,
+				__u64 offset, __u8 lockType)
+{
+	struct cifsLockInfo *li = kmalloc(sizeof(struct cifsLockInfo), GFP_KERNEL);
+	if (li == NULL)
+		return -ENOMEM;
+	li->offset = offset;
+	li->length = len;
+	li->type = lockType;
+	down(&fid->lock_sem);
+	list_add(&li->llist, &fid->llist);
+	up(&fid->lock_sem);
+	return 0;
+}
+
 int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
 {
 	int rc, xid;
@@ -581,6 +611,7 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
 	struct cifsTconInfo *pTcon;
 	__u16 netfid;
 	__u8 lockType = LOCKING_ANDX_LARGE_FILES;
+	int posix_locking;
 
 	length = 1 + pfLock->fl_end - pfLock->fl_start;
 	rc = -EACCES;
@@ -639,15 +670,14 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
 	}
 	netfid = ((struct cifsFileInfo *)file->private_data)->netfid;
 
+	posix_locking = (cifs_sb->tcon->ses->capabilities & CAP_UNIX) &&
+			(CIFS_UNIX_FCNTL_CAP & le64_to_cpu(cifs_sb->tcon->fsUnixInfo.Capability));
 
 	/* BB add code here to normalize offset and length to
 	account for negative length which we can not accept over the
 	wire */
 	if (IS_GETLK(cmd)) {
-		if(experimEnabled && 
-		   (cifs_sb->tcon->ses->capabilities & CAP_UNIX) &&
-		   (CIFS_UNIX_FCNTL_CAP & 
-			le64_to_cpu(cifs_sb->tcon->fsUnixInfo.Capability))) {
+		if(posix_locking) {
 			int posix_lock_type;
 			if(lockType & LOCKING_ANDX_SHARED_LOCK)
 				posix_lock_type = CIFS_RDLCK;
@@ -683,10 +713,15 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
 		FreeXid(xid);
 		return rc;
 	}
-	if (experimEnabled &&
-		(cifs_sb->tcon->ses->capabilities & CAP_UNIX) &&
-		(CIFS_UNIX_FCNTL_CAP &
-			 le64_to_cpu(cifs_sb->tcon->fsUnixInfo.Capability))) {
+
+	if (!numLock && !numUnlock) {
+		/* if no lock or unlock then nothing
+		to do since we do not know what it is */
+		FreeXid(xid);
+		return -EOPNOTSUPP;
+	}
+
+	if (posix_locking) {
 		int posix_lock_type;
 		if(lockType & LOCKING_ANDX_SHARED_LOCK)
 			posix_lock_type = CIFS_RDLCK;
@@ -695,18 +730,46 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
 		
 		if(numUnlock == 1)
 			posix_lock_type = CIFS_UNLCK;
-		else if(numLock == 0) {
-			/* if no lock or unlock then nothing
-			to do since we do not know what it is */
-			FreeXid(xid);
-			return -EOPNOTSUPP;
-		}
+
 		rc = CIFSSMBPosixLock(xid, pTcon, netfid, 0 /* set */,
 				      length, pfLock,
 				      posix_lock_type, wait_flag);
-	} else
-		rc = CIFSSMBLock(xid, pTcon, netfid, length, pfLock->fl_start,
-				numUnlock, numLock, lockType, wait_flag);
+	} else {
+		struct cifsFileInfo *fid = (struct cifsFileInfo *)file->private_data;
+
+		if (numLock) {
+			rc = CIFSSMBLock(xid, pTcon, netfid, length, pfLock->fl_start,
+					0, numLock, lockType, wait_flag);
+
+			if (rc == 0) {
+				/* For Windows locks we must store them. */
+				rc = store_file_lock(fid, length,
+						pfLock->fl_start, lockType);
+			}
+		} else if (numUnlock) {
+			/* For each stored lock that this unlock overlaps
+			   completely, unlock it. */
+			int stored_rc = 0;
+			struct cifsLockInfo *li, *tmp;
+
+			down(&fid->lock_sem);
+			list_for_each_entry_safe(li, tmp, &fid->llist, llist) {
+				if (pfLock->fl_start <= li->offset &&
+						length >= li->length) {
+					stored_rc = CIFSSMBLock(xid, pTcon, netfid,
+							li->length, li->offset,
+							1, 0, li->type, FALSE);
+					if (stored_rc)
+						rc = stored_rc;
+
+					list_del(&li->llist);
+					kfree(li);
+				}
+			}
+		up(&fid->lock_sem);
+		}
+	}
+
 	if (pfLock->fl_flags & FL_POSIX)
 		posix_lock_file_wait(file, pfLock);
 	FreeXid(xid);

fs/cifs/netmisc.c

@@ -72,6 +72,7 @@ static const struct smb_to_posix_error mapping_table_ERRDOS[] = {
 	{ERRinvlevel,-EOPNOTSUPP},
 	{ERRdirnotempty, -ENOTEMPTY},
 	{ERRnotlocked, -ENOLCK},
+	{ERRcancelviolation, -ENOLCK},
 	{ERRalreadyexists, -EEXIST},
 	{ERRmoredata, -EOVERFLOW},
 	{ERReasnotsupported,-EOPNOTSUPP},

fs/cifs/readdir.c

@@ -556,7 +556,7 @@ static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile)
 		FIND_FILE_STANDARD_INFO * pFindData =
 			(FIND_FILE_STANDARD_INFO *)current_entry;
 		filename = &pFindData->FileName[0];
-		len = le32_to_cpu(pFindData->FileNameLength);
+		len = pFindData->FileNameLength;
 	} else {
 		cFYI(1,("Unknown findfirst level %d",cfile->srch_inf.info_level));
 	}

fs/cifs/sess.c

@@ -372,7 +372,7 @@ CIFS_SessSetup(unsigned int xid, struct cifsSesInfo *ses, int first_time,
 
 		/* no capabilities flags in old lanman negotiation */
 
-		pSMB->old_req.PasswordLength = CIFS_SESS_KEY_SIZE; 
+		pSMB->old_req.PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE); 
 		/* BB calculate hash with password */
 		/* and copy into bcc */
 

fs/cifs/smberr.h

@@ -95,6 +95,7 @@
 #define ERRinvlevel		124
 #define ERRdirnotempty		145
 #define ERRnotlocked		158
+#define ERRcancelviolation	173
 #define ERRalreadyexists	183
 #define ERRbadpipe		230
 #define ERRpipebusy		231

fs/cifs/transport.c

@@ -3,7 +3,8 @@
  *
  *   Copyright (C) International Business Machines  Corp., 2002,2005
  *   Author(s): Steve French (sfrench@us.ibm.com)
- *
+ *   Jeremy Allison (jra@samba.org) 2006.
+ *    
  *   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
@@ -36,7 +37,7 @@ extern mempool_t *cifs_mid_poolp;
 extern kmem_cache_t *cifs_oplock_cachep;
 
 static struct mid_q_entry *
-AllocMidQEntry(struct smb_hdr *smb_buffer, struct cifsSesInfo *ses)
+AllocMidQEntry(const struct smb_hdr *smb_buffer, struct cifsSesInfo *ses)
 {
 	struct mid_q_entry *temp;
 
@@ -203,6 +204,10 @@ smb_send(struct socket *ssocket, struct smb_hdr *smb_buffer,
 		rc = 0;
 	}
 
+	/* Don't want to modify the buffer as a
+	   side effect of this call. */
+	smb_buffer->smb_buf_length = smb_buf_length;
+
 	return rc;
 }
 
@@ -217,6 +222,7 @@ smb_send2(struct socket *ssocket, struct kvec *iov, int n_vec,
 	unsigned int len = iov[0].iov_len;
 	unsigned int total_len;
 	int first_vec = 0;
+	unsigned int smb_buf_length = smb_buffer->smb_buf_length;
 	
 	if(ssocket == NULL)
 		return -ENOTSOCK; /* BB eventually add reconnect code here */
@@ -293,36 +299,15 @@ smb_send2(struct socket *ssocket, struct kvec *iov, int n_vec,
 	} else
 		rc = 0;
 
+	/* Don't want to modify the buffer as a
+	   side effect of this call. */
+	smb_buffer->smb_buf_length = smb_buf_length;
+
 	return rc;
 }
 
-int
-SendReceive2(const unsigned int xid, struct cifsSesInfo *ses, 
-	     struct kvec *iov, int n_vec, int * pRespBufType /* ret */, 
-	     const int long_op)
+static int wait_for_free_request(struct cifsSesInfo *ses, const int long_op)
 {
-	int rc = 0;
-	unsigned int receive_len;
-	unsigned long timeout;
-	struct mid_q_entry *midQ;
-	struct smb_hdr *in_buf = iov[0].iov_base;
-	
-	*pRespBufType = CIFS_NO_BUFFER;  /* no response buf yet */
-
-	if ((ses == NULL) || (ses->server == NULL)) {
-		cifs_small_buf_release(in_buf);
-		cERROR(1,("Null session"));
-		return -EIO;
-	}
-
-	if(ses->server->tcpStatus == CifsExiting) {
-		cifs_small_buf_release(in_buf);
-		return -ENOENT;
-	}
-
-	/* Ensure that we do not send more than 50 overlapping requests 
-	   to the same server. We may make this configurable later or
-	   use ses->maxReq */
 	if(long_op == -1) {
 		/* oplock breaks must not be held up */
 		atomic_inc(&ses->server->inFlight);
@@ -345,53 +330,140 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
 			} else {
 				if(ses->server->tcpStatus == CifsExiting) {
 					spin_unlock(&GlobalMid_Lock);
-					cifs_small_buf_release(in_buf);
 					return -ENOENT;
 				}
 
-			/* can not count locking commands against total since
-			   they are allowed to block on server */
+				/* can not count locking commands against total since
+				   they are allowed to block on server */
 					
-				if(long_op < 3) {
 				/* update # of requests on the wire to server */
+				if (long_op < 3)
 					atomic_inc(&ses->server->inFlight);
-				}
 				spin_unlock(&GlobalMid_Lock);
 				break;
 			}
 		}
 	}
-	/* make sure that we sign in the same order that we send on this socket 
-	   and avoid races inside tcp sendmsg code that could cause corruption
-	   of smb data */
-
-	down(&ses->server->tcpSem); 
+	return 0;
+}
 
+static int allocate_mid(struct cifsSesInfo *ses, struct smb_hdr *in_buf,
+			struct mid_q_entry **ppmidQ)
+{
 	if (ses->server->tcpStatus == CifsExiting) {
-		rc = -ENOENT;
-		goto out_unlock2;
+		return -ENOENT;
 	} else if (ses->server->tcpStatus == CifsNeedReconnect) {
 		cFYI(1,("tcp session dead - return to caller to retry"));
-		rc = -EAGAIN;
-		goto out_unlock2;
+		return -EAGAIN;
 	} else if (ses->status != CifsGood) {
 		/* check if SMB session is bad because we are setting it up */
 		if((in_buf->Command != SMB_COM_SESSION_SETUP_ANDX) && 
 			(in_buf->Command != SMB_COM_NEGOTIATE)) {
-			rc = -EAGAIN;
-			goto out_unlock2;
+			return -EAGAIN;
 		} /* else ok - we are setting up session */
 	}
-	midQ = AllocMidQEntry(in_buf, ses);
-	if (midQ == NULL) {
+	*ppmidQ = AllocMidQEntry(in_buf, ses);
+	if (*ppmidQ == NULL) {
+		return -ENOMEM;
+	}
+	return 0;
+}
+
+static int wait_for_response(struct cifsSesInfo *ses, 
+			struct mid_q_entry *midQ,
+			unsigned long timeout,
+			unsigned long time_to_wait)
+{
+	unsigned long curr_timeout;
+
+	for (;;) {
+		curr_timeout = timeout + jiffies;
+		wait_event(ses->server->response_q,
+			(!(midQ->midState == MID_REQUEST_SUBMITTED)) || 
+			time_after(jiffies, curr_timeout) || 
+			((ses->server->tcpStatus != CifsGood) &&
+			 (ses->server->tcpStatus != CifsNew)));
+
+		if (time_after(jiffies, curr_timeout) &&
+			(midQ->midState == MID_REQUEST_SUBMITTED) &&
+			((ses->server->tcpStatus == CifsGood) ||
+			 (ses->server->tcpStatus == CifsNew))) {
+
+			unsigned long lrt;
+
+			/* We timed out. Is the server still
+			   sending replies ? */
+			spin_lock(&GlobalMid_Lock);
+			lrt = ses->server->lstrp;
+			spin_unlock(&GlobalMid_Lock);
+
+			/* Calculate time_to_wait past last receive time.
+			 Although we prefer not to time out if the 
+			 server is still responding - we will time
+			 out if the server takes more than 15 (or 45 
+			 or 180) seconds to respond to this request
+			 and has not responded to any request from 
+			 other threads on the client within 10 seconds */
+			lrt += time_to_wait;
+			if (time_after(jiffies, lrt)) {
+				/* No replies for time_to_wait. */
+				cERROR(1,("server not responding"));
+				return -1;
+			}
+		} else {
+			return 0;
+		}
+	}
+}
+
+int
+SendReceive2(const unsigned int xid, struct cifsSesInfo *ses, 
+	     struct kvec *iov, int n_vec, int * pRespBufType /* ret */, 
+	     const int long_op)
+{
+	int rc = 0;
+	unsigned int receive_len;
+	unsigned long timeout;
+	struct mid_q_entry *midQ;
+	struct smb_hdr *in_buf = iov[0].iov_base;
+	
+	*pRespBufType = CIFS_NO_BUFFER;  /* no response buf yet */
+
+	if ((ses == NULL) || (ses->server == NULL)) {
+		cifs_small_buf_release(in_buf);
+		cERROR(1,("Null session"));
+		return -EIO;
+	}
+
+	if(ses->server->tcpStatus == CifsExiting) {
+		cifs_small_buf_release(in_buf);
+		return -ENOENT;
+	}
+
+	/* Ensure that we do not send more than 50 overlapping requests 
+	   to the same server. We may make this configurable later or
+	   use ses->maxReq */
+
+	rc = wait_for_free_request(ses, long_op);
+	if (rc) {
+		cifs_small_buf_release(in_buf);
+		return rc;
+	}
+
+	/* make sure that we sign in the same order that we send on this socket 
+	   and avoid races inside tcp sendmsg code that could cause corruption
+	   of smb data */
+
+	down(&ses->server->tcpSem); 
+
+	rc = allocate_mid(ses, in_buf, &midQ);
+	if (rc) {
 		up(&ses->server->tcpSem);
 		cifs_small_buf_release(in_buf);
-		/* If not lock req, update # of requests on wire to server */
-		if(long_op < 3) {
-			atomic_dec(&ses->server->inFlight); 
-			wake_up(&ses->server->request_q);
-		}
-		return -ENOMEM;
+		/* Update # of requests on wire to server */
+		atomic_dec(&ses->server->inFlight); 
+		wake_up(&ses->server->request_q);
+		return rc;
 	}
 
  	rc = cifs_sign_smb2(iov, n_vec, ses->server, &midQ->sequence_number);
@@ -406,32 +478,23 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
 	atomic_dec(&ses->server->inSend);
 	midQ->when_sent = jiffies;
 #endif
-	if(rc < 0) {
-		DeleteMidQEntry(midQ);
-		up(&ses->server->tcpSem);
-		cifs_small_buf_release(in_buf);
-		/* If not lock req, update # of requests on wire to server */
-		if(long_op < 3) {
-			atomic_dec(&ses->server->inFlight); 
-			wake_up(&ses->server->request_q);
-		}
-		return rc;
-	} else {
-		up(&ses->server->tcpSem);
-		cifs_small_buf_release(in_buf);
-	}
+
+	up(&ses->server->tcpSem);
+	cifs_small_buf_release(in_buf);
+
+	if(rc < 0)
+		goto out;
 
 	if (long_op == -1)
-		goto cifs_no_response_exit2;
+		goto out;
 	else if (long_op == 2) /* writes past end of file can take loong time */
 		timeout = 180 * HZ;
 	else if (long_op == 1)
 		timeout = 45 * HZ; /* should be greater than 
 			servers oplock break timeout (about 43 seconds) */
-	else if (long_op > 2) {
-		timeout = MAX_SCHEDULE_TIMEOUT;
-	} else
+	else
 		timeout = 15 * HZ;
+
 	/* wait for 15 seconds or until woken up due to response arriving or 
 	   due to last connection to this server being unmounted */
 	if (signal_pending(current)) {
@@ -441,19 +504,7 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
 	}   
 
 	/* No user interrupts in wait - wreaks havoc with performance */
-	if(timeout != MAX_SCHEDULE_TIMEOUT) {
-		timeout += jiffies;
-		wait_event(ses->server->response_q,
-			(!(midQ->midState & MID_REQUEST_SUBMITTED)) || 
-			time_after(jiffies, timeout) || 
-			((ses->server->tcpStatus != CifsGood) &&
-			 (ses->server->tcpStatus != CifsNew)));
-	} else {
-		wait_event(ses->server->response_q,
-			(!(midQ->midState & MID_REQUEST_SUBMITTED)) || 
-			((ses->server->tcpStatus != CifsGood) &&
-			 (ses->server->tcpStatus != CifsNew)));
-	}
+	wait_for_response(ses, midQ, timeout, 10 * HZ);
 
 	spin_lock(&GlobalMid_Lock);
 	if (midQ->resp_buf) {
@@ -481,11 +532,9 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
 		}
 		spin_unlock(&GlobalMid_Lock);
 		DeleteMidQEntry(midQ);
-		/* If not lock req, update # of requests on wire to server */
-		if(long_op < 3) {
-			atomic_dec(&ses->server->inFlight); 
-			wake_up(&ses->server->request_q);
-		}
+		/* Update # of requests on wire to server */
+		atomic_dec(&ses->server->inFlight); 
+		wake_up(&ses->server->request_q);
 		return rc;
 	}
   
@@ -536,24 +585,12 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
 			cFYI(1,("Bad MID state?"));
 		}
 	}
-cifs_no_response_exit2:
-	DeleteMidQEntry(midQ);
-
-	if(long_op < 3) {
-		atomic_dec(&ses->server->inFlight); 
-		wake_up(&ses->server->request_q);
-	}
 
-	return rc;
+out:
 
-out_unlock2:
-	up(&ses->server->tcpSem);
-	cifs_small_buf_release(in_buf);
-	/* If not lock req, update # of requests on wire to server */
-	if(long_op < 3) {
-		atomic_dec(&ses->server->inFlight); 
-		wake_up(&ses->server->request_q);
-	}
+	DeleteMidQEntry(midQ);
+	atomic_dec(&ses->server->inFlight); 
+	wake_up(&ses->server->request_q);
 
 	return rc;
 }
@@ -583,85 +620,34 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
 	/* Ensure that we do not send more than 50 overlapping requests 
 	   to the same server. We may make this configurable later or
 	   use ses->maxReq */
-	if(long_op == -1) {
-		/* oplock breaks must not be held up */
-		atomic_inc(&ses->server->inFlight);
-	} else {
-		spin_lock(&GlobalMid_Lock); 
-		while(1) {        
-			if(atomic_read(&ses->server->inFlight) >= 
-					cifs_max_pending){
-				spin_unlock(&GlobalMid_Lock);
-#ifdef CONFIG_CIFS_STATS2
-				atomic_inc(&ses->server->num_waiters);
-#endif
-				wait_event(ses->server->request_q,
-					atomic_read(&ses->server->inFlight)
-					 < cifs_max_pending);
-#ifdef CONFIG_CIFS_STATS2
-				atomic_dec(&ses->server->num_waiters);
-#endif
-				spin_lock(&GlobalMid_Lock);
-			} else {
-				if(ses->server->tcpStatus == CifsExiting) {
-					spin_unlock(&GlobalMid_Lock);
-					return -ENOENT;
-				}
 
-			/* can not count locking commands against total since
-			   they are allowed to block on server */
-					
-				if(long_op < 3) {
-				/* update # of requests on the wire to server */
-					atomic_inc(&ses->server->inFlight);
-				}
-				spin_unlock(&GlobalMid_Lock);
-				break;
-			}
-		}
-	}
+	rc = wait_for_free_request(ses, long_op);
+	if (rc)
+		return rc;
+
 	/* make sure that we sign in the same order that we send on this socket 
 	   and avoid races inside tcp sendmsg code that could cause corruption
 	   of smb data */
 
 	down(&ses->server->tcpSem); 
 
-	if (ses->server->tcpStatus == CifsExiting) {
-		rc = -ENOENT;
-		goto out_unlock;
-	} else if (ses->server->tcpStatus == CifsNeedReconnect) {
-		cFYI(1,("tcp session dead - return to caller to retry"));
-		rc = -EAGAIN;
-		goto out_unlock;
-	} else if (ses->status != CifsGood) {
-		/* check if SMB session is bad because we are setting it up */
-		if((in_buf->Command != SMB_COM_SESSION_SETUP_ANDX) && 
-			(in_buf->Command != SMB_COM_NEGOTIATE)) {
-			rc = -EAGAIN;
-			goto out_unlock;
-		} /* else ok - we are setting up session */
-	}
-	midQ = AllocMidQEntry(in_buf, ses);
-	if (midQ == NULL) {
+	rc = allocate_mid(ses, in_buf, &midQ);
+	if (rc) {
 		up(&ses->server->tcpSem);
-		/* If not lock req, update # of requests on wire to server */
-		if(long_op < 3) {
-			atomic_dec(&ses->server->inFlight); 
-			wake_up(&ses->server->request_q);
-		}
-		return -ENOMEM;
+		/* Update # of requests on wire to server */
+		atomic_dec(&ses->server->inFlight); 
+		wake_up(&ses->server->request_q);
+		return rc;
 	}
 
 	if (in_buf->smb_buf_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
-		up(&ses->server->tcpSem);
 		cERROR(1, ("Illegal length, greater than maximum frame, %d",
 			in_buf->smb_buf_length));
 		DeleteMidQEntry(midQ);
-		/* If not lock req, update # of requests on wire to server */
-		if(long_op < 3) {
-			atomic_dec(&ses->server->inFlight); 
-			wake_up(&ses->server->request_q);
-		}
+		up(&ses->server->tcpSem);
+		/* Update # of requests on wire to server */
+		atomic_dec(&ses->server->inFlight); 
+		wake_up(&ses->server->request_q);
 		return -EIO;
 	}
 
@@ -677,27 +663,19 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
 	atomic_dec(&ses->server->inSend);
 	midQ->when_sent = jiffies;
 #endif
-	if(rc < 0) {
-		DeleteMidQEntry(midQ);
-		up(&ses->server->tcpSem);
-		/* If not lock req, update # of requests on wire to server */
-		if(long_op < 3) {
-			atomic_dec(&ses->server->inFlight); 
-			wake_up(&ses->server->request_q);
-		}
-		return rc;
-	} else
-		up(&ses->server->tcpSem);
+	up(&ses->server->tcpSem);
+
+	if(rc < 0)
+		goto out;
+
 	if (long_op == -1)
-		goto cifs_no_response_exit;
+		goto out;
 	else if (long_op == 2) /* writes past end of file can take loong time */
 		timeout = 180 * HZ;
 	else if (long_op == 1)
 		timeout = 45 * HZ; /* should be greater than 
 			servers oplock break timeout (about 43 seconds) */
-	else if (long_op > 2) {
-		timeout = MAX_SCHEDULE_TIMEOUT;
-	} else
+	else
 		timeout = 15 * HZ;
 	/* wait for 15 seconds or until woken up due to response arriving or 
 	   due to last connection to this server being unmounted */
@@ -708,19 +686,7 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
 	}   
 
 	/* No user interrupts in wait - wreaks havoc with performance */
-	if(timeout != MAX_SCHEDULE_TIMEOUT) {
-		timeout += jiffies;
-		wait_event(ses->server->response_q,
-			(!(midQ->midState & MID_REQUEST_SUBMITTED)) || 
-			time_after(jiffies, timeout) || 
-			((ses->server->tcpStatus != CifsGood) &&
-			 (ses->server->tcpStatus != CifsNew)));
-	} else {
-		wait_event(ses->server->response_q,
-			(!(midQ->midState & MID_REQUEST_SUBMITTED)) || 
-			((ses->server->tcpStatus != CifsGood) &&
-			 (ses->server->tcpStatus != CifsNew)));
-	}
+	wait_for_response(ses, midQ, timeout, 10 * HZ);
 
 	spin_lock(&GlobalMid_Lock);
 	if (midQ->resp_buf) {
@@ -748,11 +714,9 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
 		}
 		spin_unlock(&GlobalMid_Lock);
 		DeleteMidQEntry(midQ);
-		/* If not lock req, update # of requests on wire to server */
-		if(long_op < 3) {
-			atomic_dec(&ses->server->inFlight); 
-			wake_up(&ses->server->request_q);
-		}
+		/* Update # of requests on wire to server */
+		atomic_dec(&ses->server->inFlight); 
+		wake_up(&ses->server->request_q);
 		return rc;
 	}
   
@@ -799,23 +763,253 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
 			cERROR(1,("Bad MID state?"));
 		}
 	}
-cifs_no_response_exit:
+
+out:
+
 	DeleteMidQEntry(midQ);
+	atomic_dec(&ses->server->inFlight); 
+	wake_up(&ses->server->request_q);
 
-	if(long_op < 3) {
-		atomic_dec(&ses->server->inFlight); 
-		wake_up(&ses->server->request_q);
-	}
+	return rc;
+}
+
+/* Send an NT_CANCEL SMB to cause the POSIX blocking lock to return. */
+
+static int
+send_nt_cancel(struct cifsTconInfo *tcon, struct smb_hdr *in_buf,
+		struct mid_q_entry *midQ)
+{
+	int rc = 0;
+	struct cifsSesInfo *ses = tcon->ses;
+	__u16 mid = in_buf->Mid;
 
+	header_assemble(in_buf, SMB_COM_NT_CANCEL, tcon, 0);
+	in_buf->Mid = mid;
+	down(&ses->server->tcpSem); 
+	rc = cifs_sign_smb(in_buf, ses->server, &midQ->sequence_number);
+	if (rc) {
+		up(&ses->server->tcpSem);
+		return rc;
+	}
+	rc = smb_send(ses->server->ssocket, in_buf, in_buf->smb_buf_length,
+	      (struct sockaddr *) &(ses->server->addr.sockAddr));
+	up(&ses->server->tcpSem);
 	return rc;
+}
+
+/* We send a LOCKINGX_CANCEL_LOCK to cause the Windows
+   blocking lock to return. */
+
+static int
+send_lock_cancel(const unsigned int xid, struct cifsTconInfo *tcon,
+			struct smb_hdr *in_buf,
+			struct smb_hdr *out_buf)
+{
+	int bytes_returned;
+	struct cifsSesInfo *ses = tcon->ses;
+	LOCK_REQ *pSMB = (LOCK_REQ *)in_buf;
+
+	/* We just modify the current in_buf to change
+	   the type of lock from LOCKING_ANDX_SHARED_LOCK
+	   or LOCKING_ANDX_EXCLUSIVE_LOCK to
+	   LOCKING_ANDX_CANCEL_LOCK. */
+
+	pSMB->LockType = LOCKING_ANDX_CANCEL_LOCK|LOCKING_ANDX_LARGE_FILES;
+	pSMB->Timeout = 0;
+	pSMB->hdr.Mid = GetNextMid(ses->server);
+
+	return SendReceive(xid, ses, in_buf, out_buf,
+			&bytes_returned, 0);
+}
 
-out_unlock:
+int
+SendReceiveBlockingLock(const unsigned int xid, struct cifsTconInfo *tcon,
+	    struct smb_hdr *in_buf, struct smb_hdr *out_buf,
+	    int *pbytes_returned)
+{
+	int rc = 0;
+	int rstart = 0;
+	unsigned int receive_len;
+	struct mid_q_entry *midQ;
+	struct cifsSesInfo *ses;
+
+	if (tcon == NULL || tcon->ses == NULL) {
+		cERROR(1,("Null smb session"));
+		return -EIO;
+	}
+	ses = tcon->ses;
+
+	if(ses->server == NULL) {
+		cERROR(1,("Null tcp session"));
+		return -EIO;
+	}
+
+	if(ses->server->tcpStatus == CifsExiting)
+		return -ENOENT;
+
+	/* Ensure that we do not send more than 50 overlapping requests 
+	   to the same server. We may make this configurable later or
+	   use ses->maxReq */
+
+	rc = wait_for_free_request(ses, 3);
+	if (rc)
+		return rc;
+
+	/* make sure that we sign in the same order that we send on this socket 
+	   and avoid races inside tcp sendmsg code that could cause corruption
+	   of smb data */
+
+	down(&ses->server->tcpSem); 
+
+	rc = allocate_mid(ses, in_buf, &midQ);
+	if (rc) {
+		up(&ses->server->tcpSem);
+		return rc;
+	}
+
+	if (in_buf->smb_buf_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
+		up(&ses->server->tcpSem);
+		cERROR(1, ("Illegal length, greater than maximum frame, %d",
+			in_buf->smb_buf_length));
+		DeleteMidQEntry(midQ);
+		return -EIO;
+	}
+
+	rc = cifs_sign_smb(in_buf, ses->server, &midQ->sequence_number);
+
+	midQ->midState = MID_REQUEST_SUBMITTED;
+#ifdef CONFIG_CIFS_STATS2
+	atomic_inc(&ses->server->inSend);
+#endif
+	rc = smb_send(ses->server->ssocket, in_buf, in_buf->smb_buf_length,
+		      (struct sockaddr *) &(ses->server->addr.sockAddr));
+#ifdef CONFIG_CIFS_STATS2
+	atomic_dec(&ses->server->inSend);
+	midQ->when_sent = jiffies;
+#endif
 	up(&ses->server->tcpSem);
-	/* If not lock req, update # of requests on wire to server */
-	if(long_op < 3) {
-		atomic_dec(&ses->server->inFlight); 
-		wake_up(&ses->server->request_q);
+
+	if(rc < 0) {
+		DeleteMidQEntry(midQ);
+		return rc;
+	}
+
+	/* Wait for a reply - allow signals to interrupt. */
+	rc = wait_event_interruptible(ses->server->response_q,
+		(!(midQ->midState == MID_REQUEST_SUBMITTED)) || 
+		((ses->server->tcpStatus != CifsGood) &&
+		 (ses->server->tcpStatus != CifsNew)));
+
+	/* Were we interrupted by a signal ? */
+	if ((rc == -ERESTARTSYS) &&
+		(midQ->midState == MID_REQUEST_SUBMITTED) &&
+		((ses->server->tcpStatus == CifsGood) ||
+		 (ses->server->tcpStatus == CifsNew))) {
+
+		if (in_buf->Command == SMB_COM_TRANSACTION2) {
+			/* POSIX lock. We send a NT_CANCEL SMB to cause the
+			   blocking lock to return. */
+
+			rc = send_nt_cancel(tcon, in_buf, midQ);
+			if (rc) {
+				DeleteMidQEntry(midQ);
+				return rc;
+			}
+		} else {
+			/* Windows lock. We send a LOCKINGX_CANCEL_LOCK
+			   to cause the blocking lock to return. */
+
+			rc = send_lock_cancel(xid, tcon, in_buf, out_buf);
+
+			/* If we get -ENOLCK back the lock may have
+			   already been removed. Don't exit in this case. */
+			if (rc && rc != -ENOLCK) {
+				DeleteMidQEntry(midQ);
+				return rc;
+			}
+		}
+
+		/* Wait 5 seconds for the response. */
+		if (wait_for_response(ses, midQ, 5 * HZ, 5 * HZ)==0) {
+			/* We got the response - restart system call. */
+			rstart = 1;
+		}
+	}
+
+	spin_lock(&GlobalMid_Lock);
+	if (midQ->resp_buf) {
+		spin_unlock(&GlobalMid_Lock);
+		receive_len = midQ->resp_buf->smb_buf_length;
+	} else {
+		cERROR(1,("No response for cmd %d mid %d",
+			  midQ->command, midQ->mid));
+		if(midQ->midState == MID_REQUEST_SUBMITTED) {
+			if(ses->server->tcpStatus == CifsExiting)
+				rc = -EHOSTDOWN;
+			else {
+				ses->server->tcpStatus = CifsNeedReconnect;
+				midQ->midState = MID_RETRY_NEEDED;
+			}
+		}
+
+		if (rc != -EHOSTDOWN) {
+			if(midQ->midState == MID_RETRY_NEEDED) {
+				rc = -EAGAIN;
+				cFYI(1,("marking request for retry"));
+			} else {
+				rc = -EIO;
+			}
+		}
+		spin_unlock(&GlobalMid_Lock);
+		DeleteMidQEntry(midQ);
+		return rc;
 	}
+  
+	if (receive_len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE) {
+		cERROR(1, ("Frame too large received.  Length: %d  Xid: %d",
+			receive_len, xid));
+		rc = -EIO;
+	} else {		/* rcvd frame is ok */
+
+		if (midQ->resp_buf && out_buf
+		    && (midQ->midState == MID_RESPONSE_RECEIVED)) {
+			out_buf->smb_buf_length = receive_len;
+			memcpy((char *)out_buf + 4,
+			       (char *)midQ->resp_buf + 4,
+			       receive_len);
+
+			dump_smb(out_buf, 92);
+			/* convert the length into a more usable form */
+			if((receive_len > 24) &&
+			   (ses->server->secMode & (SECMODE_SIGN_REQUIRED |
+					SECMODE_SIGN_ENABLED))) {
+				rc = cifs_verify_signature(out_buf,
+						ses->server->mac_signing_key,
+						midQ->sequence_number+1);
+				if(rc) {
+					cERROR(1,("Unexpected SMB signature"));
+					/* BB FIXME add code to kill session */
+				}
+			}
+
+			*pbytes_returned = out_buf->smb_buf_length;
+
+			/* BB special case reconnect tid and uid here? */
+			rc = map_smb_to_linux_error(out_buf);
 
+			/* convert ByteCount if necessary */
+			if (receive_len >=
+			    sizeof (struct smb_hdr) -
+			    4 /* do not count RFC1001 header */  +
+			    (2 * out_buf->WordCount) + 2 /* bcc */ )
+				BCC(out_buf) = le16_to_cpu(BCC_LE(out_buf));
+		} else {
+			rc = -EIO;
+			cERROR(1,("Bad MID state?"));
+		}
+	}
+	DeleteMidQEntry(midQ);
+	if (rstart && rc == -EACCES)
+		return -ERESTARTSYS;
 	return rc;
 }

fs/cifs/xattr.c

@@ -330,11 +330,15 @@ ssize_t cifs_listxattr(struct dentry * direntry, char * data, size_t buf_size)
 	sb = direntry->d_inode->i_sb;
 	if(sb == NULL)
 		return -EIO;
-	xid = GetXid();
 
 	cifs_sb = CIFS_SB(sb);
 	pTcon = cifs_sb->tcon;
 
+	if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR)
+		return -EOPNOTSUPP;
+
+	xid = GetXid();
+
 	full_path = build_path_from_dentry(direntry);
 	if(full_path == NULL) {
 		FreeXid(xid);