Merge branch 'linus' into tracing/core

Merge reason: Pick up kernel/softirq.c update for dependent fix.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

13 files changed, 223 insertions, 267 deletions

diff --git a/fs/cifs/CHANGES b/fs/cifs/CHANGES
index e85b1e4389e..145540a316a 100644
--- a/fs/cifs/CHANGES
+++ b/fs/cifs/CHANGES
@@ -3,7 +3,10 @@ Version 1.60
 Fix memory leak in reconnect.  Fix oops in DFS mount error path.
 Set s_maxbytes to smaller (the max that vfs can handle) so that
 sendfile will now work over cifs mounts again.  Add noforcegid
-and noforceuid mount parameters.
+and noforceuid mount parameters. Fix small mem leak when using
+ntlmv2. Fix 2nd mount to same server but with different port to
+be allowed (rather than reusing the 1st port) - only when the
+user explicitly overrides the port on the 2nd mount.
 
 Version 1.59
 ------------
diff --git a/fs/cifs/cifs_spnego.c b/fs/cifs/cifs_spnego.c
index 051caecf7d6..8ec7736ce95 100644
--- a/fs/cifs/cifs_spnego.c
+++ b/fs/cifs/cifs_spnego.c
@@ -125,7 +125,7 @@ cifs_get_spnego_key(struct cifsSesInfo *sesInfo)
 	if (server->addr.sockAddr.sin_family == AF_INET)
 		sprintf(dp, "ip4=%pI4", &server->addr.sockAddr.sin_addr);
 	else if (server->addr.sockAddr.sin_family == AF_INET6)
-		sprintf(dp, "ip6=%pi6", &server->addr.sockAddr6.sin6_addr);
+		sprintf(dp, "ip6=%pI6", &server->addr.sockAddr6.sin6_addr);
 	else
 		goto out;
 
diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
index 6941c22398a..7dfe0842a6f 100644
--- a/fs/cifs/cifsacl.c
+++ b/fs/cifs/cifsacl.c
@@ -607,7 +607,7 @@ static struct cifs_ntsd *get_cifs_acl(struct cifs_sb_info *cifs_sb,
 		return get_cifs_acl_by_path(cifs_sb, path, pacllen);
 
 	pntsd = get_cifs_acl_by_fid(cifs_sb, open_file->netfid, pacllen);
-	atomic_dec(&open_file->wrtPending);
+	cifsFileInfo_put(open_file);
 	return pntsd;
 }
 
@@ -665,7 +665,7 @@ static int set_cifs_acl(struct cifs_ntsd *pnntsd, __u32 acllen,
 		return set_cifs_acl_by_path(cifs_sb, path, pnntsd, acllen);
 
 	rc = set_cifs_acl_by_fid(cifs_sb, open_file->netfid, pnntsd, acllen);
-	atomic_dec(&open_file->wrtPending);
+	cifsFileInfo_put(open_file);
 	return rc;
 }
 
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index 7c9809523f4..7efe1745494 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -373,6 +373,7 @@ calc_exit_2:
 	   compare with the NTLM example */
 	hmac_md5_final(ses->server->ntlmv2_hash, pctxt);
 
+	kfree(pctxt);
 	return rc;
 }
 
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 84b75253b05..3610e9958b4 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -361,13 +361,10 @@ cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server)
 static int
 cifs_show_options(struct seq_file *s, struct vfsmount *m)
 {
-	struct cifs_sb_info *cifs_sb;
-	struct cifsTconInfo *tcon;
-
-	cifs_sb = CIFS_SB(m->mnt_sb);
-	tcon = cifs_sb->tcon;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb);
+	struct cifsTconInfo *tcon = cifs_sb->tcon;
 
-	seq_printf(s, ",unc=%s", cifs_sb->tcon->treeName);
+	seq_printf(s, ",unc=%s", tcon->treeName);
 	if (tcon->ses->userName)
 		seq_printf(s, ",username=%s", tcon->ses->userName);
 	if (tcon->ses->domainName)
@@ -989,19 +986,19 @@ static int cifs_oplock_thread(void *dummyarg)
 		if (try_to_freeze())
 			continue;
 
-		spin_lock(&GlobalMid_Lock);
-		if (list_empty(&GlobalOplock_Q)) {
-			spin_unlock(&GlobalMid_Lock);
+		spin_lock(&cifs_oplock_lock);
+		if (list_empty(&cifs_oplock_list)) {
+			spin_unlock(&cifs_oplock_lock);
 			set_current_state(TASK_INTERRUPTIBLE);
 			schedule_timeout(39*HZ);
 		} else {
-			oplock_item = list_entry(GlobalOplock_Q.next,
+			oplock_item = list_entry(cifs_oplock_list.next,
 						struct oplock_q_entry, qhead);
 			cFYI(1, ("found oplock item to write out"));
 			pTcon = oplock_item->tcon;
 			inode = oplock_item->pinode;
 			netfid = oplock_item->netfid;
-			spin_unlock(&GlobalMid_Lock);
+			spin_unlock(&cifs_oplock_lock);
 			DeleteOplockQEntry(oplock_item);
 			/* can not grab inode sem here since it would
 				deadlock when oplock received on delete
@@ -1058,7 +1055,7 @@ init_cifs(void)
 	int rc = 0;
 	cifs_proc_init();
 	INIT_LIST_HEAD(&cifs_tcp_ses_list);
-	INIT_LIST_HEAD(&GlobalOplock_Q);
+	INIT_LIST_HEAD(&cifs_oplock_list);
 #ifdef CONFIG_CIFS_EXPERIMENTAL
 	INIT_LIST_HEAD(&GlobalDnotifyReqList);
 	INIT_LIST_HEAD(&GlobalDnotifyRsp_Q);
@@ -1087,6 +1084,7 @@ init_cifs(void)
 	rwlock_init(&GlobalSMBSeslock);
 	rwlock_init(&cifs_tcp_ses_lock);
 	spin_lock_init(&GlobalMid_Lock);
+	spin_lock_init(&cifs_oplock_lock);
 
 	if (cifs_max_pending < 2) {
 		cifs_max_pending = 2;
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 6c170948300..094325e3f71 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -113,5 +113,5 @@ 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   "1.60"
+#define CIFS_VERSION   "1.61"
 #endif				/* _CIFSFS_H */
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 6084d6379c0..6cfc81a3270 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -351,11 +351,24 @@ struct cifsFileInfo {
 	bool closePend:1;	/* file is marked to close */
 	bool invalidHandle:1;	/* file closed via session abend */
 	bool messageMode:1;	/* for pipes: message vs byte mode */
-	atomic_t wrtPending;   /* handle in use - defer close */
+	atomic_t count;		/* reference count */
 	struct mutex fh_mutex; /* prevents reopen race after dead ses*/
 	struct cifs_search_info srch_inf;
 };
 
+/* Take a reference on the file private data */
+static inline void cifsFileInfo_get(struct cifsFileInfo *cifs_file)
+{
+	atomic_inc(&cifs_file->count);
+}
+
+/* Release a reference on the file private data */
+static inline void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
+{
+	if (atomic_dec_and_test(&cifs_file->count))
+		kfree(cifs_file);
+}
+
 /*
  * One of these for each file inode
  */
@@ -656,7 +669,11 @@ GLOBAL_EXTERN rwlock_t		cifs_tcp_ses_lock;
  */
 GLOBAL_EXTERN rwlock_t GlobalSMBSeslock;
 
-GLOBAL_EXTERN struct list_head GlobalOplock_Q;
+/* Global list of oplocks */
+GLOBAL_EXTERN struct list_head cifs_oplock_list;
+
+/* Protects the cifs_oplock_list */
+GLOBAL_EXTERN spinlock_t cifs_oplock_lock;
 
 /* Outstanding dir notify requests */
 GLOBAL_EXTERN struct list_head GlobalDnotifyReqList;
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index 1866bc2927d..301e307e127 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -100,110 +100,138 @@ static void mark_open_files_invalid(struct cifsTconInfo *pTcon)
 	   to this tcon */
 }
 
-/* Allocate and return pointer to an SMB request buffer, and set basic
-   SMB information in the SMB header.  If the return code is zero, this
-   function must have filled in request_buf pointer */
+/* reconnect the socket, tcon, and smb session if needed */
 static int
-small_smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
-		void **request_buf)
+cifs_reconnect_tcon(struct cifsTconInfo *tcon, int smb_command)
 {
 	int rc = 0;
+	struct cifsSesInfo *ses;
+	struct TCP_Server_Info *server;
+	struct nls_table *nls_codepage;
 
-	/* SMBs NegProt, SessSetup, uLogoff do not have tcon yet so
-	   check for tcp and smb session status done differently
-	   for those three - in the calling routine */
-	if (tcon) {
-		if (tcon->tidStatus == CifsExiting) {
-			/* only tree disconnect, open, and write,
-			(and ulogoff which does not have tcon)
-			are allowed as we start force umount */
-			if ((smb_command != SMB_COM_WRITE_ANDX) &&
-			   (smb_command != SMB_COM_OPEN_ANDX) &&
-			   (smb_command != SMB_COM_TREE_DISCONNECT)) {
-				cFYI(1, ("can not send cmd %d while umounting",
-					smb_command));
-				return -ENODEV;
-			}
+	/*
+	 * SMBs NegProt, SessSetup, uLogoff do not have tcon yet so check for
+	 * tcp and smb session status done differently for those three - in the
+	 * calling routine
+	 */
+	if (!tcon)
+		return 0;
+
+	ses = tcon->ses;
+	server = ses->server;
+
+	/*
+	 * only tree disconnect, open, and write, (and ulogoff which does not
+	 * have tcon) are allowed as we start force umount
+	 */
+	if (tcon->tidStatus == CifsExiting) {
+		if (smb_command != SMB_COM_WRITE_ANDX &&
+		    smb_command != SMB_COM_OPEN_ANDX &&
+		    smb_command != SMB_COM_TREE_DISCONNECT) {
+			cFYI(1, ("can not send cmd %d while umounting",
+				smb_command));
+			return -ENODEV;
 		}
-		if ((tcon->ses) && (tcon->ses->status != CifsExiting) &&
-				  (tcon->ses->server)) {
-			struct nls_table *nls_codepage;
-				/* Give Demultiplex thread up to 10 seconds to
-				   reconnect, should be greater than cifs socket
-				   timeout which is 7 seconds */
-			while (tcon->ses->server->tcpStatus ==
-							 CifsNeedReconnect) {
-				wait_event_interruptible_timeout(tcon->ses->server->response_q,
-					(tcon->ses->server->tcpStatus ==
-							CifsGood), 10 * HZ);
-				if (tcon->ses->server->tcpStatus ==
-							CifsNeedReconnect) {
-					/* on "soft" mounts we wait once */
-					if (!tcon->retry ||
-					   (tcon->ses->status == CifsExiting)) {
-						cFYI(1, ("gave up waiting on "
-						      "reconnect in smb_init"));
-						return -EHOSTDOWN;
-					} /* else "hard" mount - keep retrying
-					     until process is killed or server
-					     comes back on-line */
-				} else /* TCP session is reestablished now */
-					break;
-			}
+	}
 
-			nls_codepage = load_nls_default();
-		/* need to prevent multiple threads trying to
-		simultaneously reconnect the same SMB session */
-			down(&tcon->ses->sesSem);
-			if (tcon->ses->need_reconnect)
-				rc = cifs_setup_session(0, tcon->ses,
-							nls_codepage);
-			if (!rc && (tcon->need_reconnect)) {
-				mark_open_files_invalid(tcon);
-				rc = CIFSTCon(0, tcon->ses, tcon->treeName,
-					      tcon, nls_codepage);
-				up(&tcon->ses->sesSem);
-				/* BB FIXME add code to check if wsize needs
-				   update due to negotiated smb buffer size
-				   shrinking */
-				if (rc == 0) {
-					atomic_inc(&tconInfoReconnectCount);
-					/* tell server Unix caps we support */
-					if (tcon->ses->capabilities & CAP_UNIX)
-						reset_cifs_unix_caps(
-						0 /* no xid */,
-						tcon,
-						NULL /* we do not know sb */,
-						NULL /* no vol info */);
-				}
+	if (ses->status == CifsExiting)
+		return -EIO;
 
-				cFYI(1, ("reconnect tcon rc = %d", rc));
-				/* Removed call to reopen open files here.
-				   It is safer (and faster) to reopen files
-				   one at a time as needed in read and write */
-
-				/* Check if handle based operation so we
-				   know whether we can continue or not without
-				   returning to caller to reset file handle */
-				switch (smb_command) {
-					case SMB_COM_READ_ANDX:
-					case SMB_COM_WRITE_ANDX:
-					case SMB_COM_CLOSE:
-					case SMB_COM_FIND_CLOSE2:
-					case SMB_COM_LOCKING_ANDX: {
-						unload_nls(nls_codepage);
-						return -EAGAIN;
-					}
-				}
-			} else {
-				up(&tcon->ses->sesSem);
-			}
-			unload_nls(nls_codepage);
+	/*
+	 * Give demultiplex thread up to 10 seconds to reconnect, should be
+	 * greater than cifs socket timeout which is 7 seconds
+	 */
+	while (server->tcpStatus == CifsNeedReconnect) {
+		wait_event_interruptible_timeout(server->response_q,
+			(server->tcpStatus == CifsGood), 10 * HZ);
 
-		} else {
-			return -EIO;
+		/* is TCP session is reestablished now ?*/
+		if (server->tcpStatus != CifsNeedReconnect)
+			break;
+
+		/*
+		 * on "soft" mounts we wait once. Hard mounts keep
+		 * retrying until process is killed or server comes
+		 * back on-line
+		 */
+		if (!tcon->retry || ses->status == CifsExiting) {
+			cFYI(1, ("gave up waiting on reconnect in smb_init"));
+			return -EHOSTDOWN;
 		}
 	}
+
+	if (!ses->need_reconnect && !tcon->need_reconnect)
+		return 0;
+
+	nls_codepage = load_nls_default();
+
+	/*
+	 * need to prevent multiple threads trying to simultaneously
+	 * reconnect the same SMB session
+	 */
+	down(&ses->sesSem);
+	if (ses->need_reconnect)
+		rc = cifs_setup_session(0, ses, nls_codepage);
+
+	/* do we need to reconnect tcon? */
+	if (rc || !tcon->need_reconnect) {
+		up(&ses->sesSem);
+		goto out;
+	}
+
+	mark_open_files_invalid(tcon);
+	rc = CIFSTCon(0, ses, tcon->treeName, tcon, nls_codepage);
+	up(&ses->sesSem);
+	cFYI(1, ("reconnect tcon rc = %d", rc));
+
+	if (rc)
+		goto out;
+
+	/*
+	 * FIXME: check if wsize needs updated due to negotiated smb buffer
+	 * 	  size shrinking
+	 */
+	atomic_inc(&tconInfoReconnectCount);
+
+	/* tell server Unix caps we support */
+	if (ses->capabilities & CAP_UNIX)
+		reset_cifs_unix_caps(0, tcon, NULL, NULL);
+
+	/*
+	 * Removed call to reopen open files here. It is safer (and faster) to
+	 * reopen files one at a time as needed in read and write.
+	 *
+	 * FIXME: what about file locks? don't we need to reclaim them ASAP?
+	 */
+
+out:
+	/*
+	 * Check if handle based operation so we know whether we can continue
+	 * or not without returning to caller to reset file handle
+	 */
+	switch (smb_command) {
+	case SMB_COM_READ_ANDX:
+	case SMB_COM_WRITE_ANDX:
+	case SMB_COM_CLOSE:
+	case SMB_COM_FIND_CLOSE2:
+	case SMB_COM_LOCKING_ANDX:
+		rc = -EAGAIN;
+	}
+
+	unload_nls(nls_codepage);
+	return rc;
+}
+
+/* Allocate and return pointer to an SMB request buffer, and set basic
+   SMB information in the SMB header.  If the return code is zero, this
+   function must have filled in request_buf pointer */
+static int
+small_smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
+		void **request_buf)
+{
+	int rc = 0;
+
+	rc = cifs_reconnect_tcon(tcon, smb_command);
 	if (rc)
 		return rc;
 
@@ -256,101 +284,7 @@ smb_init(int smb_command, int wct, struct cifsTconInfo *tcon,
 {
 	int rc = 0;
 
-	/* SMBs NegProt, SessSetup, uLogoff do not have tcon yet so
-	   check for tcp and smb session status done differently
-	   for those three - in the calling routine */
-	if (tcon) {
-		if (tcon->tidStatus == CifsExiting) {
-			/* only tree disconnect, open, and write,
-			  (and ulogoff which does not have tcon)
-			  are allowed as we start force umount */
-			if ((smb_command != SMB_COM_WRITE_ANDX) &&
-			   (smb_command != SMB_COM_OPEN_ANDX) &&
-			   (smb_command != SMB_COM_TREE_DISCONNECT)) {
-				cFYI(1, ("can not send cmd %d while umounting",
-					smb_command));
-				return -ENODEV;
-			}
-		}
-
-		if ((tcon->ses) && (tcon->ses->status != CifsExiting) &&
-				  (tcon->ses->server)) {
-			struct nls_table *nls_codepage;
-				/* Give Demultiplex thread up to 10 seconds to
-				   reconnect, should be greater than cifs socket
-				   timeout which is 7 seconds */
-			while (tcon->ses->server->tcpStatus ==
-							CifsNeedReconnect) {
-				wait_event_interruptible_timeout(tcon->ses->server->response_q,
-					(tcon->ses->server->tcpStatus ==
-							CifsGood), 10 * HZ);
-				if (tcon->ses->server->tcpStatus ==
-						CifsNeedReconnect) {
-					/* on "soft" mounts we wait once */
-					if (!tcon->retry ||
-					   (tcon->ses->status == CifsExiting)) {
-						cFYI(1, ("gave up waiting on "
-						      "reconnect in smb_init"));
-						return -EHOSTDOWN;
-					} /* else "hard" mount - keep retrying
-					     until process is killed or server
-					     comes on-line */
-				} else /* TCP session is reestablished now */
-					break;
-			}
-			nls_codepage = load_nls_default();
-		/* need to prevent multiple threads trying to
-		simultaneously reconnect the same SMB session */
-			down(&tcon->ses->sesSem);
-			if (tcon->ses->need_reconnect)
-				rc = cifs_setup_session(0, tcon->ses,
-							nls_codepage);
-			if (!rc && (tcon->need_reconnect)) {
-				mark_open_files_invalid(tcon);
-				rc = CIFSTCon(0, tcon->ses, tcon->treeName,
-					      tcon, nls_codepage);
-				up(&tcon->ses->sesSem);
-				/* BB FIXME add code to check if wsize needs
-				update due to negotiated smb buffer size
-				shrinking */
-				if (rc == 0) {
-					atomic_inc(&tconInfoReconnectCount);
-					/* tell server Unix caps we support */
-					if (tcon->ses->capabilities & CAP_UNIX)
-						reset_cifs_unix_caps(
-						0 /* no xid */,
-						tcon,
-						NULL /* do not know sb */,
-						NULL /* no vol info */);
-				}
-
-				cFYI(1, ("reconnect tcon rc = %d", rc));
-				/* Removed call to reopen open files here.
-				   It is safer (and faster) to reopen files
-				   one at a time as needed in read and write */
-
-				/* Check if handle based operation so we
-				   know whether we can continue or not without
-				   returning to caller to reset file handle */
-				switch (smb_command) {
-					case SMB_COM_READ_ANDX:
-					case SMB_COM_WRITE_ANDX:
-					case SMB_COM_CLOSE:
-					case SMB_COM_FIND_CLOSE2:
-					case SMB_COM_LOCKING_ANDX: {
-						unload_nls(nls_codepage);
-						return -EAGAIN;
-					}
-				}
-			} else {
-				up(&tcon->ses->sesSem);
-			}
-			unload_nls(nls_codepage);
-
-		} else {
-			return -EIO;
-		}
-	}
+	rc = cifs_reconnect_tcon(tcon, smb_command);
 	if (rc)
 		return rc;
 
@@ -3961,6 +3895,10 @@ parse_DFS_referrals(TRANSACTION2_GET_DFS_REFER_RSP *pSMBr,
 		if (is_unicode) {
 			__le16 *tmp = kmalloc(strlen(searchName)*2 + 2,
 						GFP_KERNEL);
+			if (tmp == NULL) {
+				rc = -ENOMEM;
+				goto parse_DFS_referrals_exit;
+			}
 			cifsConvertToUCS((__le16 *) tmp, searchName,
 					PATH_MAX, nls_codepage, remap);
 			node->path_consumed = cifs_ucs2_bytes(tmp,
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 1f3345d7fa7..d49682433c2 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -1377,7 +1377,7 @@ cifs_parse_mount_options(char *options, const char *devname,
 }
 
 static struct TCP_Server_Info *
-cifs_find_tcp_session(struct sockaddr_storage *addr)
+cifs_find_tcp_session(struct sockaddr_storage *addr, unsigned short int port)
 {
 	struct list_head *tmp;
 	struct TCP_Server_Info *server;
@@ -1397,16 +1397,37 @@ cifs_find_tcp_session(struct sockaddr_storage *addr)
 		if (server->tcpStatus == CifsNew)
 			continue;
 
-		if (addr->ss_family == AF_INET &&
-		    (addr4->sin_addr.s_addr !=
-		     server->addr.sockAddr.sin_addr.s_addr))
-			continue;
-		else if (addr->ss_family == AF_INET6 &&
-			 (!ipv6_addr_equal(&server->addr.sockAddr6.sin6_addr,
-					   &addr6->sin6_addr) ||
-			  server->addr.sockAddr6.sin6_scope_id !=
-					   addr6->sin6_scope_id))
-			continue;
+		switch (addr->ss_family) {
+		case AF_INET:
+			if (addr4->sin_addr.s_addr ==
+			    server->addr.sockAddr.sin_addr.s_addr) {
+				addr4->sin_port = htons(port);
+				/* user overrode default port? */
+				if (addr4->sin_port) {
+					if (addr4->sin_port !=
+					    server->addr.sockAddr.sin_port)
+						continue;
+				}
+				break;
+			} else
+				continue;
+
+		case AF_INET6:
+			if (ipv6_addr_equal(&addr6->sin6_addr,
+			    &server->addr.sockAddr6.sin6_addr) &&
+			    (addr6->sin6_scope_id ==
+			    server->addr.sockAddr6.sin6_scope_id)) {
+				addr6->sin6_port = htons(port);
+				/* user overrode default port? */
+				if (addr6->sin6_port) {
+					if (addr6->sin6_port !=
+					   server->addr.sockAddr6.sin6_port)
+						continue;
+				}
+				break;
+			} else
+				continue;
+		}
 
 		++server->srv_count;
 		write_unlock(&cifs_tcp_ses_lock);
@@ -1475,7 +1496,7 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
 	}
 
 	/* see if we already have a matching tcp_ses */
-	tcp_ses = cifs_find_tcp_session(&addr);
+	tcp_ses = cifs_find_tcp_session(&addr, volume_info->port);
 	if (tcp_ses)
 		return tcp_ses;
 
@@ -2636,9 +2657,9 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
 		return -EIO;
 
 	smb_buffer = cifs_buf_get();
-	if (smb_buffer == NULL) {
+	if (smb_buffer == NULL)
 		return -ENOMEM;
-	}
+
 	smb_buffer_response = smb_buffer;
 
 	header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX,
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 4326ffd90fa..a6424cfc012 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -153,7 +153,7 @@ cifs_fill_fileinfo(struct inode *newinode, __u16 fileHandle,
 	mutex_init(&pCifsFile->fh_mutex);
 	mutex_init(&pCifsFile->lock_mutex);
 	INIT_LIST_HEAD(&pCifsFile->llist);
-	atomic_set(&pCifsFile->wrtPending, 0);
+	atomic_set(&pCifsFile->count, 1);
 
 	/* set the following in open now
 			pCifsFile->pfile = file; */
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index c34b7f8a217..fa7beac8b80 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -53,11 +53,9 @@ static inline struct cifsFileInfo *cifs_init_private(
 	private_data->pInode = inode;
 	private_data->invalidHandle = false;
 	private_data->closePend = false;
-	/* we have to track num writers to the inode, since writepages
-	does not tell us which handle the write is for so there can
-	be a close (overlapping with write) of the filehandle that
-	cifs_writepages chose to use */
-	atomic_set(&private_data->wrtPending, 0);
+	/* Initialize reference count to one.  The private data is
+	freed on the release of the last reference */
+	atomic_set(&private_data->count, 1);
 
 	return private_data;
 }
@@ -643,7 +641,7 @@ int cifs_close(struct inode *inode, struct file *file)
 			if (!pTcon->need_reconnect) {
 				write_unlock(&GlobalSMBSeslock);
 				timeout = 2;
-				while ((atomic_read(&pSMBFile->wrtPending) != 0)
+				while ((atomic_read(&pSMBFile->count) != 1)
 					&& (timeout <= 2048)) {
 					/* Give write a better chance to get to
 					server ahead of the close.  We do not
@@ -657,8 +655,6 @@ int cifs_close(struct inode *inode, struct file *file)
 					msleep(timeout);
 					timeout *= 4;
 				}
-				if (atomic_read(&pSMBFile->wrtPending))
-					cERROR(1, ("close with pending write"));
 				if (!pTcon->need_reconnect &&
 				    !pSMBFile->invalidHandle)
 					rc = CIFSSMBClose(xid, pTcon,
@@ -681,24 +677,7 @@ int cifs_close(struct inode *inode, struct file *file)
 		list_del(&pSMBFile->flist);
 		list_del(&pSMBFile->tlist);
 		write_unlock(&GlobalSMBSeslock);
-		timeout = 10;
-		/* We waited above to give the SMBWrite a chance to issue
-		   on the wire (so we do not get SMBWrite returning EBADF
-		   if writepages is racing with close.  Note that writepages
-		   does not specify a file handle, so it is possible for a file
-		   to be opened twice, and the application close the "wrong"
-		   file handle - in these cases we delay long enough to allow
-		   the SMBWrite to get on the wire before the SMB Close.
-		   We allow total wait here over 45 seconds, more than
-		   oplock break time, and more than enough to allow any write
-		   to complete on the server, or to time out on the client */
-		while ((atomic_read(&pSMBFile->wrtPending) != 0)
-				&& (timeout <= 50000)) {
-			cERROR(1, ("writes pending, delay free of handle"));
-			msleep(timeout);
-			timeout *= 8;
-		}
-		kfree(file->private_data);
+		cifsFileInfo_put(file->private_data);
 		file->private_data = NULL;
 	} else
 		rc = -EBADF;
@@ -1236,7 +1215,7 @@ struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *cifs_inode)
 			if (!open_file->invalidHandle) {
 				/* found a good file */
 				/* lock it so it will not be closed on us */
-				atomic_inc(&open_file->wrtPending);
+				cifsFileInfo_get(open_file);
 				read_unlock(&GlobalSMBSeslock);
 				return open_file;
 			} /* else might as well continue, and look for
@@ -1276,7 +1255,7 @@ refind_writable:
 		if (open_file->pfile &&
 		    ((open_file->pfile->f_flags & O_RDWR) ||
 		     (open_file->pfile->f_flags & O_WRONLY))) {
-			atomic_inc(&open_file->wrtPending);
+			cifsFileInfo_get(open_file);
 
 			if (!open_file->invalidHandle) {
 				/* found a good writable file */
@@ -1293,7 +1272,7 @@ refind_writable:
 				else { /* start over in case this was deleted */
 				       /* since the list could be modified */
 					read_lock(&GlobalSMBSeslock);
-					atomic_dec(&open_file->wrtPending);
+					cifsFileInfo_put(open_file);
 					goto refind_writable;
 				}
 			}
@@ -1309,7 +1288,7 @@ refind_writable:
 			read_lock(&GlobalSMBSeslock);
 			/* can not use this handle, no write
 			   pending on this one after all */
-			atomic_dec(&open_file->wrtPending);
+			cifsFileInfo_put(open_file);
 
 			if (open_file->closePend) /* list could have changed */
 				goto refind_writable;
@@ -1373,7 +1352,7 @@ static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to)
 	if (open_file) {
 		bytes_written = cifs_write(open_file->pfile, write_data,
 					   to-from, &offset);
-		atomic_dec(&open_file->wrtPending);
+		cifsFileInfo_put(open_file);
 		/* Does mm or vfs already set times? */
 		inode->i_atime = inode->i_mtime = current_fs_time(inode->i_sb);
 		if ((bytes_written > 0) && (offset))
@@ -1562,7 +1541,7 @@ retry:
 						   bytes_to_write, offset,
 						   &bytes_written, iov, n_iov,
 						   long_op);
-				atomic_dec(&open_file->wrtPending);
+				cifsFileInfo_put(open_file);
 				cifs_update_eof(cifsi, offset, bytes_written);
 
 				if (rc || bytes_written < bytes_to_write) {
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 82d83839655..1f09c761931 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -800,7 +800,7 @@ set_via_filehandle:
 	if (open_file == NULL)
 		CIFSSMBClose(xid, pTcon, netfid);
 	else
-		atomic_dec(&open_file->wrtPending);
+		cifsFileInfo_put(open_file);
 out:
 	return rc;
 }
@@ -1635,7 +1635,7 @@ cifs_set_file_size(struct inode *inode, struct iattr *attrs,
 		__u32 npid = open_file->pid;
 		rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid,
 					npid, false);
-		atomic_dec(&open_file->wrtPending);
+		cifsFileInfo_put(open_file);
 		cFYI(1, ("SetFSize for attrs rc = %d", rc));
 		if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
 			unsigned int bytes_written;
@@ -1790,7 +1790,7 @@ cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
 		u16 nfid = open_file->netfid;
 		u32 npid = open_file->pid;
 		rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid);
-		atomic_dec(&open_file->wrtPending);
+		cifsFileInfo_put(open_file);
 	} else {
 		rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args,
 				    cifs_sb->local_nls,
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 0ad3e2d116a..1da4ab250ea 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -119,20 +119,19 @@ AllocOplockQEntry(struct inode *pinode, __u16 fid, struct cifsTconInfo *tcon)
 		temp->pinode = pinode;
 		temp->tcon = tcon;
 		temp->netfid = fid;
-		spin_lock(&GlobalMid_Lock);
-		list_add_tail(&temp->qhead, &GlobalOplock_Q);
-		spin_unlock(&GlobalMid_Lock);
+		spin_lock(&cifs_oplock_lock);
+		list_add_tail(&temp->qhead, &cifs_oplock_list);
+		spin_unlock(&cifs_oplock_lock);
 	}
 	return temp;
-
 }
 
 void DeleteOplockQEntry(struct oplock_q_entry *oplockEntry)
 {
-	spin_lock(&GlobalMid_Lock);
+	spin_lock(&cifs_oplock_lock);
     /* should we check if list empty first? */
 	list_del(&oplockEntry->qhead);
-	spin_unlock(&GlobalMid_Lock);
+	spin_unlock(&cifs_oplock_lock);
 	kmem_cache_free(cifs_oplock_cachep, oplockEntry);
 }
 
@@ -144,14 +143,14 @@ void DeleteTconOplockQEntries(struct cifsTconInfo *tcon)
 	if (tcon == NULL)
 		return;
 
-	spin_lock(&GlobalMid_Lock);
-	list_for_each_entry(temp, &GlobalOplock_Q, qhead) {
+	spin_lock(&cifs_oplock_lock);
+	list_for_each_entry(temp, &cifs_oplock_list, qhead) {
 		if ((temp->tcon) && (temp->tcon == tcon)) {
 			list_del(&temp->qhead);
 			kmem_cache_free(cifs_oplock_cachep, temp);
 		}
 	}
-	spin_unlock(&GlobalMid_Lock);
+	spin_unlock(&cifs_oplock_lock);
 }
 
 static int