Merge commit 'v2.6.28-rc4' into timers/rtc

Conflicts:
	drivers/rtc/rtc-cmos.c

13 files changed, 494 insertions, 158 deletions

diff --git a/fs/cifs/CHANGES b/fs/cifs/CHANGES
index 06e521a945c..8855331b2fb 100644
--- a/fs/cifs/CHANGES
+++ b/fs/cifs/CHANGES
@@ -1,3 +1,15 @@
+Version 1.55
+------------
+Various fixes to make delete of open files behavior more predictable
+(when delete of an open file fails we mark the file as "delete-on-close"
+in a way that more servers accept, but only if we can first rename the
+file to a temporary name).  Add experimental support for more safely
+handling fcntl(F_SETLEASE).  Convert cifs to using blocking tcp
+sends, and also let tcp autotune the socket send and receive buffers.
+This reduces the number of EAGAIN errors returned by TCP/IP in
+high stress workloads (and the number of retries on socket writes
+when sending large SMBWriteX requests).
+
 Version 1.54
 ------------
 Fix premature write failure on congested networks (we would give up
@@ -13,6 +25,7 @@ on dns_upcall (resolving DFS referralls).  Fix plain text password
 authentication (requires setting SecurityFlags to 0x30030 to enable
 lanman and plain text though).  Fix writes to be at correct offset when
 file is open with O_APPEND and file is on a directio (forcediretio) mount.
+Fix bug in rewinding readdir directory searches.  Add nodfs mount option.
 
 Version 1.53
 ------------
diff --git a/fs/cifs/Kconfig b/fs/cifs/Kconfig
new file mode 100644
index 00000000000..341a98965bd
--- /dev/null
+++ b/fs/cifs/Kconfig
@@ -0,0 +1,142 @@
+config CIFS
+	tristate "CIFS support (advanced network filesystem, SMBFS successor)"
+	depends on INET
+	select NLS
+	help
+	  This is the client VFS module for the Common Internet File System
+	  (CIFS) protocol which is the successor to the Server Message Block
+	  (SMB) protocol, the native file sharing mechanism for most early
+	  PC operating systems.  The CIFS protocol is fully supported by
+	  file servers such as Windows 2000 (including Windows 2003, NT 4
+	  and Windows XP) as well by Samba (which provides excellent CIFS
+	  server support for Linux and many other operating systems). Limited
+	  support for OS/2 and Windows ME and similar servers is provided as
+	  well.
+
+	  The cifs module provides an advanced network file system
+	  client for mounting to CIFS compliant servers.  It includes
+	  support for DFS (hierarchical name space), secure per-user
+	  session establishment via Kerberos or NTLM or NTLMv2,
+	  safe distributed caching (oplock), optional packet
+	  signing, Unicode and other internationalization improvements.
+	  If you need to mount to Samba or Windows from this machine, say Y.
+
+config CIFS_STATS
+        bool "CIFS statistics"
+        depends on CIFS
+        help
+          Enabling this option will cause statistics for each server share
+	  mounted by the cifs client to be displayed in /proc/fs/cifs/Stats
+
+config CIFS_STATS2
+	bool "Extended statistics"
+	depends on CIFS_STATS
+	help
+	  Enabling this option will allow more detailed statistics on SMB
+	  request timing to be displayed in /proc/fs/cifs/DebugData and also
+	  allow optional logging of slow responses to dmesg (depending on the
+	  value of /proc/fs/cifs/cifsFYI, see fs/cifs/README for more details).
+	  These additional statistics may have a minor effect on performance
+	  and memory utilization.
+
+	  Unless you are a developer or are doing network performance analysis
+	  or tuning, say N.
+
+config CIFS_WEAK_PW_HASH
+	bool "Support legacy servers which use weaker LANMAN security"
+	depends on CIFS
+	help
+	  Modern CIFS servers including Samba and most Windows versions
+	  (since 1997) support stronger NTLM (and even NTLMv2 and Kerberos)
+	  security mechanisms. These hash the password more securely
+	  than the mechanisms used in the older LANMAN version of the
+	  SMB protocol but LANMAN based authentication is needed to
+	  establish sessions with some old SMB servers.
+
+	  Enabling this option allows the cifs module to mount to older
+	  LANMAN based servers such as OS/2 and Windows 95, but such
+	  mounts may be less secure than mounts using NTLM or more recent
+	  security mechanisms if you are on a public network.  Unless you
+	  have a need to access old SMB servers (and are on a private
+	  network) you probably want to say N.  Even if this support
+	  is enabled in the kernel build, LANMAN authentication will not be
+	  used automatically. At runtime LANMAN mounts are disabled but
+	  can be set to required (or optional) either in
+	  /proc/fs/cifs (see fs/cifs/README for more detail) or via an
+	  option on the mount command. This support is disabled by
+	  default in order to reduce the possibility of a downgrade
+	  attack.
+
+	  If unsure, say N.
+
+config CIFS_UPCALL
+	  bool "Kerberos/SPNEGO advanced session setup"
+	  depends on CIFS && KEYS
+	  help
+	    Enables an upcall mechanism for CIFS which accesses
+	    userspace helper utilities to provide SPNEGO packaged (RFC 4178)
+	    Kerberos tickets which are needed to mount to certain secure servers
+	    (for which more secure Kerberos authentication is required). If
+	    unsure, say N.
+
+config CIFS_XATTR
+        bool "CIFS extended attributes"
+        depends on CIFS
+        help
+          Extended attributes are name:value pairs associated with inodes by
+          the kernel or by users (see the attr(5) manual page, or visit
+          <http://acl.bestbits.at/> for details).  CIFS maps the name of
+          extended attributes beginning with the user namespace prefix
+          to SMB/CIFS EAs. EAs are stored on Windows servers without the
+          user namespace prefix, but their names are seen by Linux cifs clients
+          prefaced by the user namespace prefix. The system namespace
+          (used by some filesystems to store ACLs) is not supported at
+          this time.
+
+          If unsure, say N.
+
+config CIFS_POSIX
+        bool "CIFS POSIX Extensions"
+        depends on CIFS_XATTR
+        help
+          Enabling this option will cause the cifs client to attempt to
+	  negotiate a newer dialect with servers, such as Samba 3.0.5
+	  or later, that optionally can handle more POSIX like (rather
+	  than Windows like) file behavior.  It also enables
+	  support for POSIX ACLs (getfacl and setfacl) to servers
+	  (such as Samba 3.10 and later) which can negotiate
+	  CIFS POSIX ACL support.  If unsure, say N.
+
+config CIFS_DEBUG2
+	bool "Enable additional CIFS debugging routines"
+	depends on CIFS
+	help
+	   Enabling this option adds a few more debugging routines
+	   to the cifs code which slightly increases the size of
+	   the cifs module and can cause additional logging of debug
+	   messages in some error paths, slowing performance. This
+	   option can be turned off unless you are debugging
+	   cifs problems.  If unsure, say N.
+
+config CIFS_EXPERIMENTAL
+	  bool "CIFS Experimental Features (EXPERIMENTAL)"
+	  depends on CIFS && EXPERIMENTAL
+	  help
+	    Enables cifs features under testing. These features are
+	    experimental and currently include DFS support and directory
+	    change notification ie fcntl(F_DNOTIFY), as well as the upcall
+	    mechanism which will be used for Kerberos session negotiation
+	    and uid remapping.  Some of these features also may depend on
+	    setting a value of 1 to the pseudo-file /proc/fs/cifs/Experimental
+	    (which is disabled by default). See the file fs/cifs/README
+	    for more details.  If unsure, say N.
+
+config CIFS_DFS_UPCALL
+	  bool "DFS feature support (EXPERIMENTAL)"
+	  depends on CIFS_EXPERIMENTAL
+	  depends on KEYS
+	  help
+	    Enables an upcall mechanism for CIFS which contacts userspace
+	    helper utilities to provide server name resolution (host names to
+	    IP addresses) which is needed for implicit mounts of DFS junction
+	    points. If unsure, say N.
diff --git a/fs/cifs/README b/fs/cifs/README
index bd2343d4c6a..a439dc1739b 100644
--- a/fs/cifs/README
+++ b/fs/cifs/README
@@ -463,6 +463,9 @@ A partial list of the supported mount options follows:
 		with cifs style mandatory byte range locks (and most
 		cifs servers do not yet support requesting advisory
 		byte range locks).
+ nodfs          Disable DFS (global name space support) even if the
+		server claims to support it.  This can help work around
+		a problem with parsing of DFS paths with Samba 3.0.24 server.
  remount        remount the share (often used to change from ro to rw mounts
 	        or vice versa)
  cifsacl        Report mode bits (e.g. on stat) based on the Windows ACL for
@@ -488,6 +491,19 @@ A partial list of the supported mount options follows:
 		Note that this differs from the sign mount option in that it
 		causes encryption of data sent over this mounted share but other
 		shares mounted to the same server are unaffected.
+ locallease     This option is rarely needed. Fcntl F_SETLEASE is
+		used by some applications such as Samba and NFSv4 server to
+		check to see whether a file is cacheable.  CIFS has no way
+		to explicitly request a lease, but can check whether a file
+		is cacheable (oplocked).  Unfortunately, even if a file
+		is not oplocked, it could still be cacheable (ie cifs client
+		could grant fcntl leases if no other local processes are using
+		the file) for cases for example such as when the server does not
+		support oplocks and the user is sure that the only updates to
+		the file will be from this client. Specifying this mount option
+		will allow the cifs client to check for leases (only) locally
+		for files which are not oplocked instead of denying leases
+		in that case. (EXPERIMENTAL)
  sec            Security mode.  Allowed values are:
 			none	attempt to connection as a null user (no name)
 			krb5    Use Kerberos version 5 authentication
@@ -638,6 +654,9 @@ requires enabling CONFIG_CIFS_EXPERIMENTAL
 	cifsacl support needed to retrieve approximated mode bits based on
 		the contents on the CIFS ACL.
 
+	lease support: cifs will check the oplock state before calling into
+	the vfs to see if we can grant a lease on a file.
+
 	DNOTIFY fcntl: needed for support of directory change 
 			    notification and perhaps later for file leases)
 
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 25ecbd5b040..ac5915d61dc 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -275,9 +275,12 @@ static int cifs_permission(struct inode *inode, int mask)
 
 	cifs_sb = CIFS_SB(inode->i_sb);
 
-	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM)
-		return 0;
-	else /* file mode might have been restricted at mount time
+	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) {
+		if ((mask & MAY_EXEC) && !execute_ok(inode))
+			return -EACCES;
+		else
+			return 0;
+	} else /* file mode might have been restricted at mount time
 		on the client (above and beyond ACL on servers) for
 		servers which do not support setting and viewing mode bits,
 		so allowing client to check permissions is useful */
@@ -309,6 +312,7 @@ cifs_alloc_inode(struct super_block *sb)
 	file data or metadata */
 	cifs_inode->clientCanCacheRead = false;
 	cifs_inode->clientCanCacheAll = false;
+	cifs_inode->delete_pending = false;
 	cifs_inode->vfs_inode.i_blkbits = 14;  /* 2**14 = CIFS_MAX_MSGSIZE */
 
 	/* Can not set i_flags here - they get immediately overwritten
@@ -617,6 +621,37 @@ static loff_t cifs_llseek(struct file *file, loff_t offset, int origin)
 	return generic_file_llseek_unlocked(file, offset, origin);
 }
 
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+static int cifs_setlease(struct file *file, long arg, struct file_lock **lease)
+{
+	/* note that this is called by vfs setlease with the BKL held
+	   although I doubt that BKL is needed here in cifs */
+	struct inode *inode = file->f_path.dentry->d_inode;
+
+	if (!(S_ISREG(inode->i_mode)))
+		return -EINVAL;
+
+	/* check if file is oplocked */
+	if (((arg == F_RDLCK) &&
+		(CIFS_I(inode)->clientCanCacheRead)) ||
+	    ((arg == F_WRLCK) &&
+		(CIFS_I(inode)->clientCanCacheAll)))
+		return generic_setlease(file, arg, lease);
+	else if (CIFS_SB(inode->i_sb)->tcon->local_lease &&
+			!CIFS_I(inode)->clientCanCacheRead)
+		/* If the server claims to support oplock on this
+		   file, then we still need to check oplock even
+		   if the local_lease mount option is set, but there
+		   are servers which do not support oplock for which
+		   this mount option may be useful if the user
+		   knows that the file won't be changed on the server
+		   by anyone else */
+		return generic_setlease(file, arg, lease);
+	else
+		return -EAGAIN;
+}
+#endif
+
 struct file_system_type cifs_fs_type = {
 	.owner = THIS_MODULE,
 	.name = "cifs",
@@ -695,6 +730,7 @@ const struct file_operations cifs_file_ops = {
 
 #ifdef CONFIG_CIFS_EXPERIMENTAL
 	.dir_notify = cifs_dir_notify,
+	.setlease = cifs_setlease,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 };
 
@@ -715,6 +751,7 @@ const struct file_operations cifs_file_direct_ops = {
 	.llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_EXPERIMENTAL
 	.dir_notify = cifs_dir_notify,
+	.setlease = cifs_setlease,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 };
 const struct file_operations cifs_file_nobrl_ops = {
@@ -735,6 +772,7 @@ const struct file_operations cifs_file_nobrl_ops = {
 
 #ifdef CONFIG_CIFS_EXPERIMENTAL
 	.dir_notify = cifs_dir_notify,
+	.setlease = cifs_setlease,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 };
 
@@ -754,6 +792,7 @@ const struct file_operations cifs_file_direct_nobrl_ops = {
 	.llseek = cifs_llseek,
 #ifdef CONFIG_CIFS_EXPERIMENTAL
 	.dir_notify = cifs_dir_notify,
+	.setlease = cifs_setlease,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 };
 
@@ -765,6 +804,7 @@ const struct file_operations cifs_dir_ops = {
 	.dir_notify = cifs_dir_notify,
 #endif /* CONFIG_CIFS_EXPERIMENTAL */
 	.unlocked_ioctl  = cifs_ioctl,
+	.llseek = generic_file_llseek,
 };
 
 static void
@@ -945,6 +985,12 @@ static int cifs_oplock_thread(void *dummyarg)
 				the call */
 			/* mutex_lock(&inode->i_mutex);*/
 			if (S_ISREG(inode->i_mode)) {
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+				if (CIFS_I(inode)->clientCanCacheAll == 0)
+					break_lease(inode, FMODE_READ);
+				else if (CIFS_I(inode)->clientCanCacheRead == 0)
+					break_lease(inode, FMODE_WRITE);
+#endif
 				rc = filemap_fdatawrite(inode->i_mapping);
 				if (CIFS_I(inode)->clientCanCacheRead == 0) {
 					waitrc = filemap_fdatawait(
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index f7b4a5cd837..074de0b5064 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -101,5 +101,5 @@ extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
 extern const struct export_operations cifs_export_ops;
 #endif /* EXPERIMENTAL */
 
-#define CIFS_VERSION   "1.54"
+#define CIFS_VERSION   "1.55"
 #endif				/* _CIFSFS_H */
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 0d22479d99b..1cb1189f24e 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -141,6 +141,8 @@ struct TCP_Server_Info {
 	char versionMajor;
 	char versionMinor;
 	bool svlocal:1;			/* local server or remote */
+	bool noblocksnd;		/* use blocking sendmsg */
+	bool noautotune;		/* do not autotune send buf sizes */
 	atomic_t socketUseCount; /* number of open cifs sessions on socket */
 	atomic_t inFlight;  /* number of requests on the wire to server */
 #ifdef CONFIG_CIFS_STATS2
@@ -285,6 +287,7 @@ struct cifsTconInfo {
 	bool seal:1;      /* transport encryption for this mounted share */
 	bool unix_ext:1;  /* if false disable Linux extensions to CIFS protocol
 				for this mount even if server would support */
+	bool local_lease:1; /* check leases (only) on local system not remote */
 	/* BB add field for back pointer to sb struct(s)? */
 };
 
@@ -353,6 +356,7 @@ struct cifsInodeInfo {
 	bool clientCanCacheRead:1;	/* read oplock */
 	bool clientCanCacheAll:1;	/* read and writebehind oplock */
 	bool oplockPending:1;
+	bool delete_pending:1;		/* DELETE_ON_CLOSE is set */
 	struct inode vfs_inode;
 };
 
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index 0cff7fe986e..6f21ecb85ce 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -36,7 +36,7 @@ extern void cifs_buf_release(void *);
 extern struct smb_hdr *cifs_small_buf_get(void);
 extern void cifs_small_buf_release(void *);
 extern int smb_send(struct socket *, struct smb_hdr *,
-			unsigned int /* length */ , struct sockaddr *);
+			unsigned int /* length */ , struct sockaddr *, bool);
 extern unsigned int _GetXid(void);
 extern void _FreeXid(unsigned int);
 #define GetXid() (int)_GetXid(); cFYI(1,("CIFS VFS: in %s as Xid: %d with uid: %d",__func__, xid,current->fsuid));
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 6f4ffe15d68..d5eac48fc41 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -1309,6 +1309,7 @@ OldOpenRetry:
 				cpu_to_le64(le32_to_cpu(pSMBr->EndOfFile));
 			pfile_info->EndOfFile = pfile_info->AllocationSize;
 			pfile_info->NumberOfLinks = cpu_to_le32(1);
+			pfile_info->DeletePending = 0;
 		}
 	}
 
@@ -1410,6 +1411,7 @@ openRetry:
 		    pfile_info->AllocationSize = pSMBr->AllocationSize;
 		    pfile_info->EndOfFile = pSMBr->EndOfFile;
 		    pfile_info->NumberOfLinks = cpu_to_le32(1);
+		    pfile_info->DeletePending = 0;
 		}
 	}
 
@@ -1534,7 +1536,7 @@ CIFSSMBWrite(const int xid, struct cifsTconInfo *tcon,
 	__u32 bytes_sent;
 	__u16 byte_count;
 
-	/* cFYI(1,("write at %lld %d bytes",offset,count));*/
+	/* cFYI(1, ("write at %lld %d bytes", offset, count));*/
 	if (tcon->ses == NULL)
 		return -ECONNABORTED;
 
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 4c13bcdb92a..e9f9248cb3f 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -90,6 +90,10 @@ struct smb_vol {
 	bool nocase:1;     /* request case insensitive filenames */
 	bool nobrl:1;      /* disable sending byte range locks to srv */
 	bool seal:1;       /* request transport encryption on share */
+	bool nodfs:1;      /* Do not request DFS, even if available */
+	bool local_lease:1; /* check leases only on local system, not remote */
+	bool noblocksnd:1;
+	bool noautotune:1;
 	unsigned int rsize;
 	unsigned int wsize;
 	unsigned int sockopt;
@@ -100,9 +104,11 @@ struct smb_vol {
 static int ipv4_connect(struct sockaddr_in *psin_server,
 			struct socket **csocket,
 			char *netb_name,
-			char *server_netb_name);
+			char *server_netb_name,
+			bool noblocksnd,
+			bool nosndbuf); /* ipv6 never set sndbuf size */
 static int ipv6_connect(struct sockaddr_in6 *psin_server,
-			struct socket **csocket);
+			struct socket **csocket, bool noblocksnd);
 
 
 	/*
@@ -124,7 +130,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
 	struct mid_q_entry *mid_entry;
 
 	spin_lock(&GlobalMid_Lock);
-	if (kthread_should_stop()) {
+	if (server->tcpStatus == CifsExiting) {
 		/* the demux thread will exit normally
 		next time through the loop */
 		spin_unlock(&GlobalMid_Lock);
@@ -184,16 +190,18 @@ cifs_reconnect(struct TCP_Server_Info *server)
 	spin_unlock(&GlobalMid_Lock);
 	up(&server->tcpSem);
 
-	while ((!kthread_should_stop()) && (server->tcpStatus != CifsGood)) {
+	while ((server->tcpStatus != CifsExiting) &&
+	       (server->tcpStatus != CifsGood)) {
 		try_to_freeze();
 		if (server->protocolType == IPV6) {
 			rc = ipv6_connect(&server->addr.sockAddr6,
-					  &server->ssocket);
+					  &server->ssocket, server->noautotune);
 		} else {
 			rc = ipv4_connect(&server->addr.sockAddr,
 					&server->ssocket,
 					server->workstation_RFC1001_name,
-					server->server_RFC1001_name);
+					server->server_RFC1001_name,
+					server->noblocksnd, server->noautotune);
 		}
 		if (rc) {
 			cFYI(1, ("reconnect error %d", rc));
@@ -201,7 +209,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
 		} else {
 			atomic_inc(&tcpSesReconnectCount);
 			spin_lock(&GlobalMid_Lock);
-			if (!kthread_should_stop())
+			if (server->tcpStatus != CifsExiting)
 				server->tcpStatus = CifsGood;
 			server->sequence_number = 0;
 			spin_unlock(&GlobalMid_Lock);
@@ -356,7 +364,7 @@ cifs_demultiplex_thread(struct TCP_Server_Info *server)
 				GFP_KERNEL);
 
 	set_freezable();
-	while (!kthread_should_stop()) {
+	while (server->tcpStatus != CifsExiting) {
 		if (try_to_freeze())
 			continue;
 		if (bigbuf == NULL) {
@@ -397,7 +405,7 @@ incomplete_rcv:
 		    kernel_recvmsg(csocket, &smb_msg,
 				&iov, 1, pdu_length, 0 /* BB other flags? */);
 
-		if (kthread_should_stop()) {
+		if (server->tcpStatus == CifsExiting) {
 			break;
 		} else if (server->tcpStatus == CifsNeedReconnect) {
 			cFYI(1, ("Reconnect after server stopped responding"));
@@ -522,7 +530,7 @@ incomplete_rcv:
 		     total_read += length) {
 			length = kernel_recvmsg(csocket, &smb_msg, &iov, 1,
 						pdu_length - total_read, 0);
-			if (kthread_should_stop() ||
+			if ((server->tcpStatus == CifsExiting) ||
 			    (length == -EINTR)) {
 				/* then will exit */
 				reconnect = 2;
@@ -651,14 +659,6 @@ multi_t2_fnd:
 	spin_unlock(&GlobalMid_Lock);
 	wake_up_all(&server->response_q);
 
-	/* don't exit until kthread_stop is called */
-	set_current_state(TASK_UNINTERRUPTIBLE);
-	while (!kthread_should_stop()) {
-		schedule();
-		set_current_state(TASK_UNINTERRUPTIBLE);
-	}
-	set_current_state(TASK_RUNNING);
-
 	/* 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 */
@@ -755,6 +755,7 @@ multi_t2_fnd:
 	write_unlock(&GlobalSMBSeslock);
 
 	kfree(server->hostname);
+	task_to_wake = xchg(&server->tsk, NULL);
 	kfree(server);
 
 	length = atomic_dec_return(&tcpSesAllocCount);
@@ -762,6 +763,16 @@ multi_t2_fnd:
 		mempool_resize(cifs_req_poolp, length + cifs_min_rcv,
 				GFP_KERNEL);
 
+	/* if server->tsk was NULL then wait for a signal before exiting */
+	if (!task_to_wake) {
+		set_current_state(TASK_INTERRUPTIBLE);
+		while (!signal_pending(current)) {
+			schedule();
+			set_current_state(TASK_INTERRUPTIBLE);
+		}
+		set_current_state(TASK_RUNNING);
+	}
+
 	return 0;
 }
 
@@ -1186,6 +1197,10 @@ cifs_parse_mount_options(char *options, const char *devname,
 			/* ignore */
 		} else if (strnicmp(data, "rw", 2) == 0) {
 			vol->rw = true;
+		} else if (strnicmp(data, "noblocksend", 11) == 0) {
+			vol->noblocksnd = 1;
+		} else if (strnicmp(data, "noautotune", 10) == 0) {
+			vol->noautotune = 1;
 		} else if ((strnicmp(data, "suid", 4) == 0) ||
 				   (strnicmp(data, "nosuid", 6) == 0) ||
 				   (strnicmp(data, "exec", 4) == 0) ||
@@ -1218,6 +1233,8 @@ cifs_parse_mount_options(char *options, const char *devname,
 			vol->sfu_emul = 1;
 		} else if (strnicmp(data, "nosfu", 5) == 0) {
 			vol->sfu_emul = 0;
+		} else if (strnicmp(data, "nodfs", 5) == 0) {
+			vol->nodfs = 1;
 		} else if (strnicmp(data, "posixpaths", 10) == 0) {
 			vol->posix_paths = 1;
 		} else if (strnicmp(data, "noposixpaths", 12) == 0) {
@@ -1268,6 +1285,10 @@ cifs_parse_mount_options(char *options, const char *devname,
 			vol->no_psx_acl = 0;
 		} else if (strnicmp(data, "noacl", 5) == 0) {
 			vol->no_psx_acl = 1;
+#ifdef CONFIG_CIFS_EXPERIMENTAL
+		} else if (strnicmp(data, "locallease", 6) == 0) {
+			vol->local_lease = 1;
+#endif
 		} else if (strnicmp(data, "sign", 4) == 0) {
 			vol->secFlg |= CIFSSEC_MUST_SIGN;
 		} else if (strnicmp(data, "seal", 4) == 0) {
@@ -1506,7 +1527,8 @@ static void rfc1002mangle(char *target, char *source, unsigned int length)
 
 static int
 ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
-	     char *netbios_name, char *target_name)
+	     char *netbios_name, char *target_name,
+	     bool noblocksnd, bool noautotune)
 {
 	int rc = 0;
 	int connected = 0;
@@ -1578,11 +1600,16 @@ ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
 		 (*csocket)->sk->sk_sndbuf,
 		 (*csocket)->sk->sk_rcvbuf, (*csocket)->sk->sk_rcvtimeo));
 	(*csocket)->sk->sk_rcvtimeo = 7 * HZ;
+	if (!noblocksnd)
+		(*csocket)->sk->sk_sndtimeo = 3 * HZ;
+
 	/* 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;
+	if (noautotune) {
+		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;
+	}
 
 	/* send RFC1001 sessinit */
 	if (psin_server->sin_port == htons(RFC1001_PORT)) {
@@ -1619,7 +1646,7 @@ ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
 			/* sizeof RFC1002_SESSION_REQUEST with no scope */
 			smb_buf->smb_buf_length = 0x81000044;
 			rc = smb_send(*csocket, smb_buf, 0x44,
-				(struct sockaddr *)psin_server);
+				(struct sockaddr *)psin_server, noblocksnd);
 			kfree(ses_init_buf);
 			msleep(1); /* RFC1001 layer in at least one server
 				      requires very short break before negprot
@@ -1639,7 +1666,8 @@ ipv4_connect(struct sockaddr_in *psin_server, struct socket **csocket,
 }
 
 static int
-ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
+ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket,
+	     bool noblocksnd)
 {
 	int rc = 0;
 	int connected = 0;
@@ -1708,6 +1736,9 @@ ipv6_connect(struct sockaddr_in6 *psin_server, struct socket **csocket)
 		the default. sock_setsockopt not used because it expects
 		user space buffer */
 	(*csocket)->sk->sk_rcvtimeo = 7 * HZ;
+	if (!noblocksnd)
+		(*csocket)->sk->sk_sndtimeo = 3 * HZ;
+
 
 	return rc;
 }
@@ -1845,6 +1876,16 @@ convert_delimiter(char *path, char delim)
 	}
 }
 
+static void
+kill_cifsd(struct TCP_Server_Info *server)
+{
+	struct task_struct *task;
+
+	task = xchg(&server->tsk, NULL);
+	if (task)
+		force_sig(SIGKILL, task);
+}
+
 int
 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
 	   char *mount_data, const char *devname)
@@ -1961,11 +2002,14 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
 			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);
+			rc = ipv6_connect(&sin_server6, &csocket,
+					volume_info.noblocksnd);
 		} else
 			rc = ipv4_connect(&sin_server, &csocket,
 				  volume_info.source_rfc1001_name,
-				  volume_info.target_rfc1001_name);
+				  volume_info.target_rfc1001_name,
+				  volume_info.noblocksnd,
+				  volume_info.noautotune);
 		if (rc < 0) {
 			cERROR(1, ("Error connecting to IPv4 socket. "
 				   "Aborting operation"));
@@ -1980,6 +2024,8 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
 			sock_release(csocket);
 			goto out;
 		} else {
+			srvTcp->noblocksnd = volume_info.noblocksnd;
+			srvTcp->noautotune = volume_info.noautotune;
 			memcpy(&srvTcp->addr.sockAddr, &sin_server,
 				sizeof(struct sockaddr_in));
 			atomic_set(&srvTcp->inFlight, 0);
@@ -2166,6 +2212,7 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
 			   for the retry flag is used */
 			tcon->retry = volume_info.retry;
 			tcon->nocase = volume_info.nocase;
+			tcon->local_lease = volume_info.local_lease;
 			if (tcon->seal != volume_info.seal)
 				cERROR(1, ("transport encryption setting "
 					   "conflicts with existing tid"));
@@ -2197,6 +2244,12 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
 						volume_info.UNC,
 						tcon, cifs_sb->local_nls);
 					cFYI(1, ("CIFS Tcon rc = %d", rc));
+					if (volume_info.nodfs) {
+						tcon->Flags &=
+							~SMB_SHARE_IS_IN_DFS;
+						cFYI(1, ("DFS disabled (%d)",
+							tcon->Flags));
+					}
 				}
 				if (!rc) {
 					atomic_inc(&pSesInfo->inUse);
@@ -2225,14 +2278,7 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
 			spin_lock(&GlobalMid_Lock);
 			srvTcp->tcpStatus = CifsExiting;
 			spin_unlock(&GlobalMid_Lock);
-			if (srvTcp->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 */
-				force_sig(SIGKILL, srvTcp->tsk);
-				kthread_stop(srvTcp->tsk);
-			}
+			kill_cifsd(srvTcp);
 		}
 		 /* If find_unc succeeded then rc == 0 so we can not end */
 		if (tcon)  /* up accidently freeing someone elses tcon struct */
@@ -2245,19 +2291,15 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
 					temp_rc = CIFSSMBLogoff(xid, pSesInfo);
 					/* if the socketUseCount is now zero */
 					if ((temp_rc == -ESHUTDOWN) &&
-					    (pSesInfo->server) &&
-					    (pSesInfo->server->tsk)) {
-						force_sig(SIGKILL,
-							pSesInfo->server->tsk);
-						kthread_stop(pSesInfo->server->tsk);
-					}
+					    (pSesInfo->server))
+						kill_cifsd(pSesInfo->server);
 				} else {
 					cFYI(1, ("No session or bad tcon"));
-					if ((pSesInfo->server) &&
-					    (pSesInfo->server->tsk)) {
-						force_sig(SIGKILL,
-							pSesInfo->server->tsk);
-						kthread_stop(pSesInfo->server->tsk);
+					if (pSesInfo->server) {
+						spin_lock(&GlobalMid_Lock);
+						srvTcp->tcpStatus = CifsExiting;
+						spin_unlock(&GlobalMid_Lock);
+						kill_cifsd(pSesInfo->server);
 					}
 				}
 				sesInfoFree(pSesInfo);
@@ -3544,7 +3586,6 @@ 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;
 	char *tmp;
 
 	xid = GetXid();
@@ -3560,7 +3601,6 @@ cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
 		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) {
@@ -3568,10 +3608,8 @@ cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb)
 				return 0;
 			} else if (rc == -ESHUTDOWN) {
 				cFYI(1, ("Waking up socket by sending signal"));
-				if (cifsd_task) {
-					force_sig(SIGKILL, cifsd_task);
-					kthread_stop(cifsd_task);
-				}
+				if (ses->server)
+					kill_cifsd(ses->server);
 				rc = 0;
 			} /* else - we have an smb session
 				left on this socket do not kill cifsd */
@@ -3701,7 +3739,9 @@ int cifs_setup_session(unsigned int xid, struct cifsSesInfo *pSesInfo,
 		cERROR(1, ("Send error in SessSetup = %d", rc));
 	} else {
 		cFYI(1, ("CIFS Session Established successfully"));
+			spin_lock(&GlobalMid_Lock);
 			pSesInfo->status = CifsGood;
+			spin_unlock(&GlobalMid_Lock);
 	}
 
 ss_err_exit:
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index c4a8a060512..ead1a3bb025 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -1791,7 +1791,7 @@ static void cifs_copy_cache_pages(struct address_space *mapping,
 		SetPageUptodate(page);
 		unlock_page(page);
 		if (!pagevec_add(plru_pvec, page))
-			__pagevec_lru_add(plru_pvec);
+			__pagevec_lru_add_file(plru_pvec);
 		data += PAGE_CACHE_SIZE;
 	}
 	return;
@@ -1824,7 +1824,7 @@ static int cifs_readpages(struct file *file, struct address_space *mapping,
 	pTcon = cifs_sb->tcon;
 
 	pagevec_init(&lru_pvec, 0);
-		cFYI(DBG2, ("rpages: num pages %d", num_pages));
+	cFYI(DBG2, ("rpages: num pages %d", num_pages));
 	for (i = 0; i < num_pages; ) {
 		unsigned contig_pages;
 		struct page *tmp_page;
@@ -1925,7 +1925,7 @@ static int cifs_readpages(struct file *file, struct address_space *mapping,
 		bytes_read = 0;
 	}
 
-	pagevec_lru_add(&lru_pvec);
+	pagevec_lru_add_file(&lru_pvec);
 
 /* need to free smb_read_data buf before exit */
 	if (smb_read_data) {
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index a8c833345fc..ff8c68de4a9 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -506,6 +506,7 @@ int cifs_get_inode_info(struct inode **pinode,
 	inode = *pinode;
 	cifsInfo = CIFS_I(inode);
 	cifsInfo->cifsAttrs = attr;
+	cifsInfo->delete_pending = pfindData->DeletePending ? true : false;
 	cFYI(1, ("Old time %ld", cifsInfo->time));
 	cifsInfo->time = jiffies;
 	cFYI(1, ("New time %ld", cifsInfo->time));
@@ -772,63 +773,106 @@ out:
  * anything else.
  */
 static int
-cifs_rename_pending_delete(char *full_path, struct inode *inode, int xid)
+cifs_rename_pending_delete(char *full_path, struct dentry *dentry, int xid)
 {
 	int oplock = 0;
 	int rc;
 	__u16 netfid;
+	struct inode *inode = dentry->d_inode;
 	struct cifsInodeInfo *cifsInode = CIFS_I(inode);
 	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 	struct cifsTconInfo *tcon = cifs_sb->tcon;
-	__u32 dosattr;
-	FILE_BASIC_INFO *info_buf;
+	__u32 dosattr, origattr;
+	FILE_BASIC_INFO *info_buf = NULL;
 
 	rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN,
-			 DELETE|FILE_WRITE_ATTRIBUTES,
-			 CREATE_NOT_DIR|CREATE_DELETE_ON_CLOSE,
+			 DELETE|FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR,
 			 &netfid, &oplock, NULL, cifs_sb->local_nls,
 			 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 	if (rc != 0)
 		goto out;
 
-	/* set ATTR_HIDDEN and clear ATTR_READONLY */
-	cifsInode = CIFS_I(inode);
-	dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
+	origattr = cifsInode->cifsAttrs;
+	if (origattr == 0)
+		origattr |= ATTR_NORMAL;
+
+	dosattr = origattr & ~ATTR_READONLY;
 	if (dosattr == 0)
 		dosattr |= ATTR_NORMAL;
 	dosattr |= ATTR_HIDDEN;
 
-	info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
-	if (info_buf == NULL) {
-		rc = -ENOMEM;
-		goto out_close;
+	/* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */
+	if (dosattr != origattr) {
+		info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL);
+		if (info_buf == NULL) {
+			rc = -ENOMEM;
+			goto out_close;
+		}
+		info_buf->Attributes = cpu_to_le32(dosattr);
+		rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid,
+					current->tgid);
+		/* although we would like to mark the file hidden
+ 		   if that fails we will still try to rename it */
+		if (rc != 0)
+			cifsInode->cifsAttrs = dosattr;
+		else
+			dosattr = origattr; /* since not able to change them */
 	}
-	info_buf->Attributes = cpu_to_le32(dosattr);
-	rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, current->tgid);
-	kfree(info_buf);
-	if (rc != 0)
-		goto out_close;
-	cifsInode->cifsAttrs = dosattr;
 
-	/* silly-rename the file */
-	CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls,
+	/* rename the file */
+	rc = CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls,
 				   cifs_sb->mnt_cifs_flags &
 					    CIFS_MOUNT_MAP_SPECIAL_CHR);
+	if (rc != 0) {
+		rc = -ETXTBSY;
+		goto undo_setattr;
+	}
 
-	/* set DELETE_ON_CLOSE */
-	rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid, current->tgid);
-
-	/*
-	 * some samba versions return -ENOENT when we try to set the file
-	 * disposition here. Likely a samba bug, but work around it for now
-	 */
-	if (rc == -ENOENT)
-		rc = 0;
+	/* try to set DELETE_ON_CLOSE */
+	if (!cifsInode->delete_pending) {
+		rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid,
+					       current->tgid);
+		/*
+		 * some samba versions return -ENOENT when we try to set the
+		 * file disposition here. Likely a samba bug, but work around
+		 * it for now. This means that some cifsXXX files may hang
+		 * around after they shouldn't.
+		 *
+		 * BB: remove this hack after more servers have the fix
+		 */
+		if (rc == -ENOENT)
+			rc = 0;
+		else if (rc != 0) {
+			rc = -ETXTBSY;
+			goto undo_rename;
+		}
+		cifsInode->delete_pending = true;
+	}
 
 out_close:
 	CIFSSMBClose(xid, tcon, netfid);
 out:
+	kfree(info_buf);
 	return rc;
+
+	/*
+	 * reset everything back to the original state. Don't bother
+	 * dealing with errors here since we can't do anything about
+	 * them anyway.
+	 */
+undo_rename:
+	CIFSSMBRenameOpenFile(xid, tcon, netfid, dentry->d_name.name,
+				cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
+					    CIFS_MOUNT_MAP_SPECIAL_CHR);
+undo_setattr:
+	if (dosattr != origattr) {
+		info_buf->Attributes = cpu_to_le32(origattr);
+		if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid,
+					current->tgid))
+			cifsInode->cifsAttrs = origattr;
+	}
+
+	goto out_close;
 }
 
 int cifs_unlink(struct inode *dir, struct dentry *dentry)
@@ -878,7 +922,7 @@ psx_del_no_retry:
 	} else if (rc == -ENOENT) {
 		d_drop(dentry);
 	} else if (rc == -ETXTBSY) {
-		rc = cifs_rename_pending_delete(full_path, inode, xid);
+		rc = cifs_rename_pending_delete(full_path, dentry, xid);
 		if (rc == 0)
 			drop_nlink(inode);
 	} else if (rc == -EACCES && dosattr == 0) {
@@ -1241,22 +1285,21 @@ cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath,
 	return rc;
 }
 
-int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
-	struct inode *target_inode, struct dentry *target_direntry)
+int cifs_rename(struct inode *source_dir, struct dentry *source_dentry,
+	struct inode *target_dir, struct dentry *target_dentry)
 {
 	char *fromName = NULL;
 	char *toName = NULL;
 	struct cifs_sb_info *cifs_sb_source;
 	struct cifs_sb_info *cifs_sb_target;
-	struct cifsTconInfo *pTcon;
+	struct cifsTconInfo *tcon;
 	FILE_UNIX_BASIC_INFO *info_buf_source = NULL;
 	FILE_UNIX_BASIC_INFO *info_buf_target;
-	int xid;
-	int rc;
+	int xid, rc, tmprc;
 
-	cifs_sb_target = CIFS_SB(target_inode->i_sb);
-	cifs_sb_source = CIFS_SB(source_inode->i_sb);
-	pTcon = cifs_sb_source->tcon;
+	cifs_sb_target = CIFS_SB(target_dir->i_sb);
+	cifs_sb_source = CIFS_SB(source_dir->i_sb);
+	tcon = cifs_sb_source->tcon;
 
 	xid = GetXid();
 
@@ -1264,7 +1307,7 @@ int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
 	 * BB: this might be allowed if same server, but different share.
 	 * Consider adding support for this
 	 */
-	if (pTcon != cifs_sb_target->tcon) {
+	if (tcon != cifs_sb_target->tcon) {
 		rc = -EXDEV;
 		goto cifs_rename_exit;
 	}
@@ -1273,65 +1316,67 @@ int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
 	 * we already have the rename sem so we do not need to
 	 * grab it again here to protect the path integrity
 	 */
-	fromName = build_path_from_dentry(source_direntry);
+	fromName = build_path_from_dentry(source_dentry);
 	if (fromName == NULL) {
 		rc = -ENOMEM;
 		goto cifs_rename_exit;
 	}
 
-	toName = build_path_from_dentry(target_direntry);
+	toName = build_path_from_dentry(target_dentry);
 	if (toName == NULL) {
 		rc = -ENOMEM;
 		goto cifs_rename_exit;
 	}
 
-	rc = cifs_do_rename(xid, source_direntry, fromName,
-			    target_direntry, toName);
+	rc = cifs_do_rename(xid, source_dentry, fromName,
+			    target_dentry, toName);
 
-	if (rc == -EEXIST) {
-		if (pTcon->unix_ext) {
-			/*
-			 * Are src and dst hardlinks of same inode? We can
-			 * only tell with unix extensions enabled
-			 */
-			info_buf_source =
-				kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO),
-						GFP_KERNEL);
-			if (info_buf_source == NULL)
-				goto unlink_target;
-
-			info_buf_target = info_buf_source + 1;
-			rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
-						info_buf_source,
-						cifs_sb_source->local_nls,
-						cifs_sb_source->mnt_cifs_flags &
-						CIFS_MOUNT_MAP_SPECIAL_CHR);
-			if (rc != 0)
-				goto unlink_target;
-
-			rc = CIFSSMBUnixQPathInfo(xid, pTcon,
-						toName, info_buf_target,
-						cifs_sb_target->local_nls,
-						/* remap based on source sb */
-						cifs_sb_source->mnt_cifs_flags &
-						CIFS_MOUNT_MAP_SPECIAL_CHR);
+	if (rc == -EEXIST && tcon->unix_ext) {
+		/*
+		 * Are src and dst hardlinks of same inode? We can
+		 * only tell with unix extensions enabled
+		 */
+		info_buf_source =
+			kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO),
+					GFP_KERNEL);
+		if (info_buf_source == NULL) {
+			rc = -ENOMEM;
+			goto cifs_rename_exit;
+		}
+
+		info_buf_target = info_buf_source + 1;
+		tmprc = CIFSSMBUnixQPathInfo(xid, tcon, fromName,
+					info_buf_source,
+					cifs_sb_source->local_nls,
+					cifs_sb_source->mnt_cifs_flags &
+					CIFS_MOUNT_MAP_SPECIAL_CHR);
+		if (tmprc != 0)
+			goto unlink_target;
+
+		tmprc = CIFSSMBUnixQPathInfo(xid, tcon,
+					toName, info_buf_target,
+					cifs_sb_target->local_nls,
+					/* remap based on source sb */
+					cifs_sb_source->mnt_cifs_flags &
+					CIFS_MOUNT_MAP_SPECIAL_CHR);
 
-			if (rc == 0 && (info_buf_source->UniqueId ==
-					info_buf_target->UniqueId))
-				/* same file, POSIX says that this is a noop */
-				goto cifs_rename_exit;
-		} /* else ... BB we could add the same check for Windows by
+		if (tmprc == 0 && (info_buf_source->UniqueId ==
+				   info_buf_target->UniqueId)) {
+			/* same file, POSIX says that this is a noop */
+			rc = 0;
+			goto cifs_rename_exit;
+		}
+	} /* else ... BB we could add the same check for Windows by
 		     checking the UniqueId via FILE_INTERNAL_INFO */
+
 unlink_target:
-		/*
-		 * we either can not tell the files are hardlinked (as with
-		 * Windows servers) or files are not hardlinked. Delete the
-		 * target manually before renaming to follow POSIX rather than
-		 * Windows semantics
-		 */
-		cifs_unlink(target_inode, target_direntry);
-		rc = cifs_do_rename(xid, source_direntry, fromName,
-				    target_direntry, toName);
+	if ((rc == -EACCES) || (rc == -EEXIST)) {
+		tmprc = cifs_unlink(target_dir, target_dentry);
+		if (tmprc)
+			goto cifs_rename_exit;
+
+		rc = cifs_do_rename(xid, source_dentry, fromName,
+				    target_dentry, toName);
 	}
 
 cifs_rename_exit:
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index 765adf12d54..58d57299f2a 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -762,14 +762,15 @@ static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
 				 rc));
 			return rc;
 		}
+		cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
 	}
 
 	while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
 	      (rc == 0) && !cifsFile->srch_inf.endOfSearch) {
 		cFYI(1, ("calling findnext2"));
-		cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
 		rc = CIFSFindNext(xid, pTcon, cifsFile->netfid,
 				  &cifsFile->srch_inf);
+		cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
 		if (rc)
 			return -ENOENT;
 	}
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index bf0e6d8e382..ff8243a8fe3 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -161,7 +161,7 @@ void DeleteTconOplockQEntries(struct cifsTconInfo *tcon)
 
 int
 smb_send(struct socket *ssocket, struct smb_hdr *smb_buffer,
-	 unsigned int smb_buf_length, struct sockaddr *sin)
+	 unsigned int smb_buf_length, struct sockaddr *sin, bool noblocksnd)
 {
 	int rc = 0;
 	int i = 0;
@@ -178,7 +178,10 @@ smb_send(struct socket *ssocket, struct smb_hdr *smb_buffer,
 	smb_msg.msg_namelen = sizeof(struct sockaddr);
 	smb_msg.msg_control = NULL;
 	smb_msg.msg_controllen = 0;
-	smb_msg.msg_flags = MSG_DONTWAIT + MSG_NOSIGNAL; /* BB add more flags?*/
+	if (noblocksnd)
+		smb_msg.msg_flags = MSG_DONTWAIT + MSG_NOSIGNAL;
+	else
+		smb_msg.msg_flags = MSG_NOSIGNAL;
 
 	/* smb header is converted in header_assemble. bcc and rest of SMB word
 	   area, and byte area if necessary, is converted to littleendian in
@@ -229,8 +232,8 @@ smb_send(struct socket *ssocket, struct smb_hdr *smb_buffer,
 }
 
 static int
-smb_send2(struct socket *ssocket, struct kvec *iov, int n_vec,
-	  struct sockaddr *sin)
+smb_send2(struct TCP_Server_Info *server, struct kvec *iov, int n_vec,
+	  struct sockaddr *sin, bool noblocksnd)
 {
 	int rc = 0;
 	int i = 0;
@@ -240,6 +243,7 @@ smb_send2(struct socket *ssocket, struct kvec *iov, int n_vec,
 	unsigned int total_len;
 	int first_vec = 0;
 	unsigned int smb_buf_length = smb_buffer->smb_buf_length;
+	struct socket *ssocket = server->ssocket;
 
 	if (ssocket == NULL)
 		return -ENOTSOCK; /* BB eventually add reconnect code here */
@@ -248,7 +252,10 @@ smb_send2(struct socket *ssocket, struct kvec *iov, int n_vec,
 	smb_msg.msg_namelen = sizeof(struct sockaddr);
 	smb_msg.msg_control = NULL;
 	smb_msg.msg_controllen = 0;
-	smb_msg.msg_flags = MSG_DONTWAIT + MSG_NOSIGNAL; /* BB add more flags?*/
+	if (noblocksnd)
+		smb_msg.msg_flags = MSG_DONTWAIT + MSG_NOSIGNAL;
+	else
+		smb_msg.msg_flags = MSG_NOSIGNAL;
 
 	/* smb header is converted in header_assemble. bcc and rest of SMB word
 	   area, and byte area if necessary, is converted to littleendian in
@@ -283,8 +290,11 @@ smb_send2(struct socket *ssocket, struct kvec *iov, int n_vec,
 		if (rc < 0)
 			break;
 
-		if (rc >= total_len) {
-			WARN_ON(rc > total_len);
+		if (rc == total_len) {
+			total_len = 0;
+			break;
+		} else if (rc > total_len) {
+			cERROR(1, ("sent %d requested %d", rc, total_len));
 			break;
 		}
 		if (rc == 0) {
@@ -312,6 +322,16 @@ smb_send2(struct socket *ssocket, struct kvec *iov, int n_vec,
 		i = 0; /* in case we get ENOSPC on the next send */
 	}
 
+	if ((total_len > 0) && (total_len != smb_buf_length + 4)) {
+		cFYI(1, ("partial send (%d remaining), terminating session",
+			total_len));
+		/* If we have only sent part of an SMB then the next SMB
+		   could be taken as the remainder of this one.  We need
+		   to kill the socket so the server throws away the partial
+		   SMB */
+		server->tcpStatus = CifsNeedReconnect;
+	}
+
 	if (rc < 0) {
 		cERROR(1, ("Error %d sending data on socket to server", rc));
 	} else
@@ -518,8 +538,9 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses,
 #ifdef CONFIG_CIFS_STATS2
 	atomic_inc(&ses->server->inSend);
 #endif
-	rc = smb_send2(ses->server->ssocket, iov, n_vec,
-		      (struct sockaddr *) &(ses->server->addr.sockAddr));
+	rc = smb_send2(ses->server, iov, n_vec,
+		      (struct sockaddr *) &(ses->server->addr.sockAddr),
+		       ses->server->noblocksnd);
 #ifdef CONFIG_CIFS_STATS2
 	atomic_dec(&ses->server->inSend);
 	midQ->when_sent = jiffies;
@@ -711,7 +732,8 @@ SendReceive(const unsigned int xid, struct cifsSesInfo *ses,
 	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));
+		      (struct sockaddr *) &(ses->server->addr.sockAddr),
+		      ses->server->noblocksnd);
 #ifdef CONFIG_CIFS_STATS2
 	atomic_dec(&ses->server->inSend);
 	midQ->when_sent = jiffies;
@@ -851,7 +873,8 @@ send_nt_cancel(struct cifsTconInfo *tcon, struct smb_hdr *in_buf,
 		return rc;
 	}
 	rc = smb_send(ses->server->ssocket, in_buf, in_buf->smb_buf_length,
-	      (struct sockaddr *) &(ses->server->addr.sockAddr));
+	      (struct sockaddr *) &(ses->server->addr.sockAddr),
+	      ses->server->noblocksnd);
 	up(&ses->server->tcpSem);
 	return rc;
 }
@@ -941,7 +964,8 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifsTconInfo *tcon,
 	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));
+		      (struct sockaddr *) &(ses->server->addr.sockAddr),
+		      ses->server->noblocksnd);
 #ifdef CONFIG_CIFS_STATS2
 	atomic_dec(&ses->server->inSend);
 	midQ->when_sent = jiffies;