diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index c608ea62f536..eb7b6573f322 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -481,10 +481,20 @@ cifs_show_options(struct seq_file *s, struct dentry *root)
 		seq_puts(s, ",persistenthandles");
 	else if (tcon->use_resilient)
 		seq_puts(s, ",resilienthandles");
+
+#ifdef CONFIG_CIFS_SMB311
+	if (tcon->posix_extensions)
+		seq_puts(s, ",posix");
+	else if (tcon->unix_ext)
+		seq_puts(s, ",unix");
+	else
+		seq_puts(s, ",nounix");
+#else
 	if (tcon->unix_ext)
 		seq_puts(s, ",unix");
 	else
 		seq_puts(s, ",nounix");
+#endif /* SMB311 */
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS)
 		seq_puts(s, ",posixpaths");
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index b131a395b95c..3e2ee7e1d85e 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -522,6 +522,7 @@ struct smb_vol {
 	bool sfu_remap:1;  /* remap seven reserved chars ala SFU */
 	bool posix_paths:1; /* unset to not ask for posix pathnames. */
 	bool no_linux_ext:1;
+	bool linux_ext:1;
 	bool sfu_emul:1;
 	bool nullauth:1;   /* attempt to authenticate with null user */
 	bool nocase:1;     /* request case insensitive filenames */
@@ -960,6 +961,9 @@ struct cifs_tcon {
 	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 */
+#ifdef CONFIG_CIFS_SMB311
+	bool posix_extensions; /* if true SMB3.11 posix extensions enabled */
+#endif /* CIFS_311 */
 	bool local_lease:1; /* check leases (only) on local system not remote */
 	bool broken_posix_open; /* e.g. Samba server versions < 3.3.2, 3.2.9 */
 	bool broken_sparse_sup; /* if server or share does not support sparse */
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index ed3b6de88395..4c0e3f6ae356 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -77,7 +77,7 @@ enum {
 	Opt_mapposix, Opt_nomapposix,
 	Opt_mapchars, Opt_nomapchars, Opt_sfu,
 	Opt_nosfu, Opt_nodfs, Opt_posixpaths,
-	Opt_noposixpaths, Opt_nounix,
+	Opt_noposixpaths, Opt_nounix, Opt_unix,
 	Opt_nocase,
 	Opt_brl, Opt_nobrl,
 	Opt_handlecache, Opt_nohandlecache,
@@ -146,6 +146,10 @@ static const match_table_t cifs_mount_option_tokens = {
 	{ Opt_noposixpaths, "noposixpaths" },
 	{ Opt_nounix, "nounix" },
 	{ Opt_nounix, "nolinux" },
+	{ Opt_nounix, "noposix" },
+	{ Opt_unix, "unix" },
+	{ Opt_unix, "linux" },
+	{ Opt_unix, "posix" },
 	{ Opt_nocase, "nocase" },
 	{ Opt_nocase, "ignorecase" },
 	{ Opt_brl, "brl" },
@@ -1438,8 +1442,17 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
 			vol->posix_paths = 0;
 			break;
 		case Opt_nounix:
+			if (vol->linux_ext)
+				cifs_dbg(VFS,
+					"conflicting unix mount options\n");
 			vol->no_linux_ext = 1;
 			break;
+		case Opt_unix:
+			if (vol->no_linux_ext)
+				cifs_dbg(VFS,
+					"conflicting unix mount options\n");
+			vol->linux_ext = 1;
+			break;
 		case Opt_nocase:
 			vol->nocase = 1;
 			break;
@@ -2985,6 +2998,13 @@ cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
 		}
 	}
 
+#ifdef CONFIG_CIFS_SMB311
+	if ((volume_info->linux_ext) && (ses->server->posix_ext_supported)) {
+		if (ses->server->vals->protocol_id == SMB311_PROT_ID)
+			tcon->posix_extensions = true;
+	}
+#endif /* 311 */
+
 	/*
 	 * BB Do we need to wrap session_mutex around this TCon call and Unix
 	 * SetFS as we do on SessSetup and reconnect?
@@ -4406,6 +4426,7 @@ cifs_construct_tcon(struct cifs_sb_info *cifs_sb, kuid_t fsuid)
 
 	if (cap_unix(ses))
 		reset_cifs_unix_caps(0, tcon, NULL, vol_info);
+
 out:
 	kfree(vol_info->username);
 	kzfree(vol_info->password);