Merge tag '6.15-rc-part1-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull smb client updates from Steve French:

- Fix for network namespace refcount leak

- Multichannel fix and minor multichannel debug message cleanup

- Fix potential null ptr reference in SMB3 close

- Fix for special file handling when reparse points not supported by
server

- Two ACL fixes one for stricter ACE validation, one for incorrect
perms requested

- Three RFC1001 fixes: one for SMB3 mounts on port 139, one for better
default hostname, and one for better session response processing

- Minor update to email address for MAINTAINERS file

- Allow disabling Unicode for access to old SMB1 servers

- Three minor cleanups

* tag '6.15-rc-part1-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6:
cifs: Add new mount option -o nounicode to disable SMB1 UNICODE mode
cifs: Set default Netbios RFC1001 server name to hostname in UNC
smb: client: Fix netns refcount imbalance causing leaks and use-after-free
cifs: add validation check for the fields in smb_aces
CIFS: Propagate min offload along with other parameters from primary to secondary channels.
cifs: Improve establishing SMB connection with NetBIOS session
cifs: Fix establishing NetBIOS session for SMB2+ connection
cifs: Fix getting DACL-only xattr system.cifs_acl and system.smb3_acl
cifs: Check if server supports reparse points before using them
MAINTAINERS: reorder preferred email for Steve French
cifs: avoid NULL pointer dereference in dbg call
smb: client: Remove redundant check in smb2_is_path_accessible()
smb: client: Remove redundant check in cifs_oplock_break()
smb: mark the new channel addition log as informational log with cifs_info
smb: minor cleanup to remove unused function declaration

MAINTAINERS

···
 KERNEL SMB3 SERVER (KSMBD)
 M:	Namjae Jeon <[e-mail]>
 M:	Namjae Jeon <[e-mail]>
-M:	Steve French <[e-mail]>
 M:	Steve French <[e-mail]>
+M:	Steve French <[e-mail]>
 R:	Sergey Senozhatsky <[e-mail]>
 R:	Tom Talpey <[e-mail]>
 L:	[e-mail]

fs/smb/client/cifsacl.c

···
 			return;
 
 		for (i = 0; i < num_aces; ++i) {
+			if (end_of_acl - acl_base < acl_size)
+				break;
+
 			ppace[i] = (struct smb_ace *) (acl_base + acl_size);
+			acl_base = (char *)ppace[i];
+			acl_size = offsetof(struct smb_ace, sid) +
+				offsetof(struct smb_sid, sub_auth);
+
+			if (end_of_acl - acl_base < acl_size ||
+			    ppace[i]->sid.num_subauth == 0 ||
+			    ppace[i]->sid.num_subauth > SID_MAX_SUB_AUTHORITIES ||
+			    (end_of_acl - acl_base <
+			     acl_size + sizeof(__le32) * ppace[i]->sid.num_subauth) ||
+			    (le16_to_cpu(ppace[i]->size) <
+			     acl_size + sizeof(__le32) * ppace[i]->sid.num_subauth))
+				break;
+
 #ifdef CONFIG_CIFS_DEBUG2
 			dump_ace(ppace[i], end_of_acl);
 #endif
···
 				(void *)ppace[i],
 				sizeof(struct smb_ace)); */
 
-			acl_base = (char *)ppace[i];
 			acl_size = le16_to_cpu(ppace[i]->size);
 		}
 
···
 	int rc = 0;
 	struct tcon_link *tlink = cifs_sb_tlink(cifs_sb);
 	struct smb_version_operations *ops;
-	const u32 info = 0;
+	const u32 info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO;
 
 	cifs_dbg(NOISY, "converting ACL to mode for %s\n", path);
 
···
 	struct tcon_link *tlink;
 	struct smb_version_operations *ops;
 	bool mode_from_sid, id_from_sid;
-	const u32 info = 0;
+	const u32 info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO;
 	bool posix;
 
 	tlink = cifs_sb_tlink(cifs_sb);

fs/smb/client/cifsfs.c

···
 					   cifs_sb->ctx->dir_mode);
 	if (cifs_sb->ctx->iocharset)
 		seq_printf(s, ",iocharset=%s", cifs_sb->ctx->iocharset);
+	if (tcon->ses->unicode == 0)
+		seq_puts(s, ",nounicode");
+	else if (tcon->ses->unicode == 1)
+		seq_puts(s, ",unicode");
 	if (tcon->seal)
 		seq_puts(s, ",seal");
 	else if (tcon->ses->server->ignore_signature)

fs/smb/client/cifsglob.h

···
 	unsigned int	cap_unix;
 	unsigned int	cap_nt_find;
 	unsigned int	cap_large_files;
+	unsigned int	cap_unicode;
 	__u16		signing_enabled;
 	__u16		signing_required;
 	size_t		create_lease_size;
···
 	bool sign;		/* is signing required? */
 	bool domainAuto:1;
 	bool expired_pwd;  /* track if access denied or expired pwd so can know if need to update */
+	int unicode;
 	unsigned int flags;
 	__u16 session_flags;
 	__u8 smb3signingkey[SMB3_SIGN_KEY_SIZE];

fs/smb/client/cifsproto.h

···
 extern void free_rsp_buf(int, void *);
 extern int smb_send(struct TCP_Server_Info *, struct smb_hdr *,
 			unsigned int /* length */);
+extern int smb_send_kvec(struct TCP_Server_Info *server,
+			 struct msghdr *msg,
+			 size_t *sent);
 extern unsigned int _get_xid(void);
 extern void _free_xid(unsigned int);
 #define get_xid()							\
···
 int cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid);
 
 void cifs_async_writev(struct cifs_io_subrequest *wdata);
-void cifs_writev_complete(struct work_struct *work);
 int cifs_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
 			  struct cifs_sb_info *cifs_sb,
 			  const unsigned char *path, char *pbuf,

fs/smb/client/cifssmb.c

···
 		return rc;
 
 	pSMB->hdr.Mid = get_next_mid(server);
-	pSMB->hdr.Flags2 |= (SMBFLG2_UNICODE | SMBFLG2_ERR_STATUS);
+	pSMB->hdr.Flags2 |= SMBFLG2_ERR_STATUS;
+
+	if (ses->unicode != 0)
+		pSMB->hdr.Flags2 |= SMBFLG2_UNICODE;
 
 	if (should_set_ext_sec_flag(ses->sectype)) {
 		cifs_dbg(FYI, "Requesting extended security\n");
···
 	if (cap_unix(tcon->ses))
 		return -EOPNOTSUPP;
 
+	if (!(le32_to_cpu(tcon->fsAttrInfo.Attributes) & FILE_SUPPORTS_REPARSE_POINTS))
+		return -EOPNOTSUPP;
+
 	oparms = (struct cifs_open_parms) {
 		.tcon = tcon,
 		.cifs_sb = cifs_sb,
···
 	/* BB TEST with big acls that might need to be e.g. larger than 16K */
 	pSMB->MaxSetupCount = 0;
 	pSMB->Fid = fid; /* file handle always le */
-	pSMB->AclFlags = cpu_to_le32(CIFS_ACL_OWNER | CIFS_ACL_GROUP |
-				     CIFS_ACL_DACL | info);
+	pSMB->AclFlags = cpu_to_le32(info);
 	pSMB->ByteCount = cpu_to_le16(11); /* 3 bytes pad + 8 bytes parm */
 	inc_rfc1001_len(pSMB, 11);
 	iov[0].iov_base = (char *)pSMB;

fs/smb/client/connect.c

···
 			 server->ssocket->flags);
 		sock_release(server->ssocket);
 		server->ssocket = NULL;
+		put_net(cifs_net_ns(server));
 	}
 	server->sequence_number = 0;
 	server->session_estab = false;
···
 	/* Grab netns reference for this server. */
 	cifs_set_net_ns(tcp_ses, get_net(current->nsproxy->net_ns));
 
+	tcp_ses->sign = ctx->sign;
 	tcp_ses->conn_id = atomic_inc_return(&tcpSesNextId);
 	tcp_ses->noblockcnt = ctx->rootfs;
 	tcp_ses->noblocksnd = ctx->noblocksnd || ctx->rootfs;
···
 	ses->cred_uid = ctx->cred_uid;
 	ses->linux_uid = ctx->linux_uid;
 
+	ses->unicode = ctx->unicode;
 	ses->sectype = ctx->sectype;
 	ses->sign = ctx->sign;
 
···
 }
 
 static int
+smb_recv_kvec(struct TCP_Server_Info *server, struct msghdr *msg, size_t *recv)
+{
+	int rc = 0;
+	int retries = 0;
+	int msg_flags = server->noblocksnd ? MSG_DONTWAIT : 0;
+
+	*recv = 0;
+
+	while (msg_data_left(msg)) {
+		rc = sock_recvmsg(server->ssocket, msg, msg_flags);
+		if (rc == -EAGAIN) {
+			retries++;
+			if (retries >= 14 ||
+			    (!server->noblocksnd && (retries > 2))) {
+				cifs_server_dbg(VFS, "sends on sock %p stuck for 15 seconds\n",
+						server->ssocket);
+				return -EAGAIN;
+			}
+			msleep(1 << retries);
+			continue;
+		}
+
+		if (rc < 0)
+			return rc;
+
+		if (rc == 0) {
+			cifs_dbg(FYI, "Received no data (TCP RST)\n");
+			return -ECONNABORTED;
+		}
+
+		/* recv was at least partially successful */
+		*recv += rc;
+		retries = 0; /* in case we get ENOSPC on the next send */
+	}
+	return 0;
+}
+
+static int
 ip_rfc1001_connect(struct TCP_Server_Info *server)
 {
 	int rc = 0;
···
 	 * sessinit is sent but no second negprot
 	 */
 	struct rfc1002_session_packet req = {};
-	struct smb_hdr *smb_buf = (struct smb_hdr *)&req;
+	struct rfc1002_session_packet resp = {};
+	struct msghdr msg = {};
+	struct kvec iov = {};
 	unsigned int len;
+	size_t sent;
+	size_t recv;
 
 	req.trailer.session_req.called_len = sizeof(req.trailer.session_req.called_name);
 
···
 	 * As per rfc1002, @len must be the number of bytes that follows the
 	 * length field of a rfc1002 session request payload.
 	 */
-	len = sizeof(req) - offsetof(struct rfc1002_session_packet, trailer.session_req);
+	len = sizeof(req.trailer.session_req);
+	req.type = RFC1002_SESSION_REQUEST;
+	req.flags = 0;
+	req.length = cpu_to_be16(len);
+	len += offsetof(typeof(req), trailer.session_req);
+	iov.iov_base = &req;
+	iov.iov_len = len;
+	iov_iter_kvec(&msg.msg_iter, ITER_SOURCE, &iov, 1, len);
+	rc = smb_send_kvec(server, &msg, &sent);
+	if (rc < 0 || len != sent)
+		return (rc == -EINTR || rc == -EAGAIN) ? rc : -ECONNABORTED;
 
-	smb_buf->smb_buf_length = cpu_to_be32((RFC1002_SESSION_REQUEST << 24) | len);
-	rc = smb_send(server, smb_buf, len);
 	/*
 	 * RFC1001 layer in at least one server requires very short break before
 	 * negprot presumably because not expecting negprot to follow so fast.
-	 * This is a simple solution that works without complicating the code
-	 * and causes no significant slowing down on mount for everyone else
+	 * For example DOS SMB servers cannot process negprot if it was received
+	 * before the server sent response for SESSION_REQUEST packet. So, wait
+	 * for the response, read it and parse it as it can contain useful error
+	 * information (e.g. specified server name was incorrect). For example
+	 * even the latest Windows Server 2022 SMB1 server over port 139 send
+	 * error if its server name was in SESSION_REQUEST packet incorrect.
+	 * Nowadays usage of port 139 is not common, so waiting for reply here
+	 * does not slowing down mounting of common case (over port 445).
 	 */
-	usleep_range(1000, 2000);
+	len = offsetof(typeof(resp), trailer);
+	iov.iov_base = &resp;
+	iov.iov_len = len;
+	iov_iter_kvec(&msg.msg_iter, ITER_DEST, &iov, 1, len);
+	rc = smb_recv_kvec(server, &msg, &recv);
+	if (rc < 0 || recv != len)
+		return (rc == -EINTR || rc == -EAGAIN) ? rc : -ECONNABORTED;
 
-	return rc;
+	switch (resp.type) {
+	case RFC1002_POSITIVE_SESSION_RESPONSE:
+		if (be16_to_cpu(resp.length) != 0) {
+			cifs_dbg(VFS, "RFC 1002 positive session response but with invalid non-zero length %u\n",
+				 be16_to_cpu(resp.length));
+			return -EIO;
+		}
+		cifs_dbg(FYI, "RFC 1002 positive session response");
+		break;
+	case RFC1002_NEGATIVE_SESSION_RESPONSE:
+		/* Read RFC1002 response error code and convert it to errno in rc */
+		len = sizeof(resp.trailer.neg_ses_resp_error_code);
+		iov.iov_base = &resp.trailer.neg_ses_resp_error_code;
+		iov.iov_len = len;
+		iov_iter_kvec(&msg.msg_iter, ITER_DEST, &iov, 1, len);
+		if (be16_to_cpu(resp.length) == len &&
+		    smb_recv_kvec(server, &msg, &recv) == 0 &&
+		    recv == len) {
+			cifs_dbg(VFS, "RFC 1002 negative session response with error 0x%x\n",
+				 resp.trailer.neg_ses_resp_error_code);
+			switch (resp.trailer.neg_ses_resp_error_code) {
+			case RFC1002_NOT_LISTENING_CALLED:
+				/* server does not listen for specified server name */
+				fallthrough;
+			case RFC1002_NOT_PRESENT:
+				/* server name is incorrect */
+				rc = -ENOENT;
+				cifs_dbg(VFS, "Server rejected NetBIOS servername %.15s\n",
+					 server->server_RFC1001_name[0] ?
+					 server->server_RFC1001_name :
+					 DEFAULT_CIFS_CALLED_NAME);
+				cifs_dbg(VFS, "Specify correct NetBIOS servername in source path or with -o servern= option\n");
+				break;
+			case RFC1002_NOT_LISTENING_CALLING:
+				/* client name was not accepted by server */
+				rc = -EACCES;
+				cifs_dbg(VFS, "Server rejected NetBIOS clientname %.15s\n",
+					 server->workstation_RFC1001_name[0] ?
+					 server->workstation_RFC1001_name :
+					 "LINUX_CIFS_CLNT");
+				cifs_dbg(VFS, "Specify correct NetBIOS clientname with -o netbiosname= option\n");
+				break;
+			case RFC1002_INSUFFICIENT_RESOURCE:
+				/* remote server resource error */
+				rc = -EREMOTEIO;
+				break;
+			case RFC1002_UNSPECIFIED_ERROR:
+			default:
+				/* other/unknown error */
+				rc = -EIO;
+				break;
+			}
+		} else {
+			cifs_dbg(VFS, "RFC 1002 negative session response\n");
+			rc = -EIO;
+		}
+		return rc;
+	case RFC1002_RETARGET_SESSION_RESPONSE:
+		cifs_dbg(VFS, "RFC 1002 retarget session response\n");
+		if (be16_to_cpu(resp.length) == sizeof(resp.trailer.retarget_resp)) {
+			len = sizeof(resp.trailer.retarget_resp);
+			iov.iov_base = &resp.trailer.retarget_resp;
+			iov.iov_len = len;
+			iov_iter_kvec(&msg.msg_iter, ITER_DEST, &iov, 1, len);
+			if (smb_recv_kvec(server, &msg, &recv) == 0 && recv == len) {
+				cifs_dbg(VFS, "Server wants to redirect connection\n");
+				cifs_dbg(VFS, "Remount with options -o ip=%pI4,port=%u\n",
+					 &resp.trailer.retarget_resp.retarget_ip_addr,
+					 be16_to_cpu(resp.trailer.retarget_resp.port));
+			}
+		}
+		cifs_dbg(VFS, "Closing connection\n");
+		/* FIXME: Should we automatically redirect to new retarget_resp server? */
+		return -EMULTIHOP;
+	default:
+		cifs_dbg(VFS, "RFC 1002 unknown response type 0x%x\n", resp.type);
+		return -EIO;
+	}
+
+	return 0;
 }
 
 static int
···
 		/*
 		 * Grab netns reference for the socket.
 		 *
-		 * It'll be released here, on error, or in clean_demultiplex_info() upon server
-		 * teardown.
+		 * This reference will be released in several situations:
+		 * - In the failure path before the cifsd thread is started.
+		 * - In the all place where server->socket is released, it is
+		 *   also set to NULL.
+		 * - Ultimately in clean_demultiplex_info(), during the final
+		 *   teardown.
 		 */
 		get_net(net);
 
···
 	}
 
 	rc = bind_socket(server);
-	if (rc < 0) {
-		put_net(cifs_net_ns(server));
+	if (rc < 0)
 		return rc;
-	}
 
 	/*
 	 * Eventually check for other socket options to change from
···
 	trace_smb3_connect_done(server->hostname, server->conn_id, &server->dstaddr);
 	if (sport == htons(RFC1001_PORT))
 		rc = ip_rfc1001_connect(server);
-
-	if (rc < 0)
-		put_net(cifs_net_ns(server));
 
 	return rc;
 }
···
 		   struct TCP_Server_Info *server,
 		   struct nls_table *nls_info)
 {
-	int rc = -ENOSYS;
+	int rc = 0;
 	struct TCP_Server_Info *pserver = SERVER_IS_CHAN(server) ? server->primary_server : server;
 	struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)&pserver->dstaddr;
 	struct sockaddr_in *addr = (struct sockaddr_in *)&pserver->dstaddr;
···
 		if (!linuxExtEnabled)
 			ses->capabilities &= (~server->vals->cap_unix);
 
+		/*
+		 * Check if the server supports specified encoding mode.
+		 * Zero value in vals->cap_unicode indidcates that chosen
+		 * protocol dialect does not support non-UNICODE mode.
+		 */
+		if (ses->unicode == 1 && server->vals->cap_unicode != 0 &&
+		    !(server->capabilities & server->vals->cap_unicode)) {
+			cifs_dbg(VFS, "Server does not support mounting in UNICODE mode\n");
+			rc = -EOPNOTSUPP;
+		} else if (ses->unicode == 0 && server->vals->cap_unicode == 0) {
+			cifs_dbg(VFS, "Server does not support mounting in non-UNICODE mode\n");
+			rc = -EOPNOTSUPP;
+		} else if (ses->unicode == 0) {
+			/*
+			 * When UNICODE mode was explicitly disabled then
+			 * do not announce client UNICODE capability.
+			 */
+			ses->capabilities &= (~server->vals->cap_unicode);
+		}
+
 		if (ses->auth_key.response) {
 			cifs_dbg(FYI, "Free previous auth_key.response = %p\n",
 				 ses->auth_key.response);
···
 	cifs_dbg(FYI, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d\n",
 		 server->sec_mode, server->capabilities, server->timeAdj);
 
-	if (server->ops->sess_setup)
-		rc = server->ops->sess_setup(xid, ses, server, nls_info);
+	if (!rc) {
+		if (server->ops->sess_setup)
+			rc = server->ops->sess_setup(xid, ses, server, nls_info);
+		else
+			rc = -ENOSYS;
+	}
 
 	if (rc) {
 		cifs_server_dbg(VFS, "Send error in SessSetup = %d\n", rc);
···
 	ctx->seal = master_tcon->seal;
 	ctx->witness = master_tcon->use_witness;
 	ctx->dfs_root_ses = master_tcon->ses->dfs_root_ses;
+	ctx->unicode = master_tcon->ses->unicode;
 
 	rc = cifs_set_vol_auth(ctx, master_tcon->ses);
 	if (rc) {

fs/smb/client/file.c

···
 		cinode->oplock = 0;
 	}
 
-	if (inode && S_ISREG(inode->i_mode)) {
+	if (S_ISREG(inode->i_mode)) {
 		if (CIFS_CACHE_READ(cinode))
 			break_lease(inode, O_RDONLY);
 		else

fs/smb/client/fs_context.c

···
 	fsparam_flag("compress", Opt_compress),
 	fsparam_flag("witness", Opt_witness),
 	fsparam_flag_no("nativesocket", Opt_nativesocket),
+	fsparam_flag_no("unicode", Opt_unicode),
 
 	/* Mount options which take uid or gid */
 	fsparam_uid("backupuid", Opt_backupuid),
···
 		cifs_errorf(fc, "can not change iocharset during remount\n");
 		return -EINVAL;
 	}
+	if (new_ctx->unicode != old_ctx->unicode) {
+		cifs_errorf(fc, "can not change unicode during remount\n");
+		return -EINVAL;
+	}
 
 	return 0;
 }
···
 	int i, opt;
 	bool is_smb3 = !strcmp(fc->fs_type->name, "smb3");
 	bool skip_parsing = false;
+	char *hostname;
 
 	cifs_dbg(FYI, "CIFS: parsing cifs mount option '%s'\n", param->key);
 
···
 			cifs_errorf(fc, "OOM when copying UNC string\n");
 			goto cifs_parse_mount_err;
 		}
+		hostname = extract_hostname(ctx->UNC);
+		if (IS_ERR(hostname)) {
+			cifs_errorf(fc, "Cannot extract hostname from UNC string\n");
+			goto cifs_parse_mount_err;
+		}
+		/* last byte, type, is 0x20 for servr type */
+		memset(ctx->target_rfc1001_name, 0x20, RFC1001_NAME_LEN_WITH_NULL);
+		for (i = 0; i < RFC1001_NAME_LEN && hostname[i] != 0; i++)
+			ctx->target_rfc1001_name[i] = toupper(hostname[i]);
+		kfree(hostname);
 		break;
 	case Opt_user:
 		kfree(ctx->username);
···
 #endif
 		ctx->witness = true;
 		pr_warn_once("Witness protocol support is experimental\n");
+		break;
+	case Opt_unicode:
+		ctx->unicode = !result.negated;
+		cifs_dbg(FYI, "unicode set to %d\n", ctx->unicode);
 		break;
 	case Opt_rootfs:
 #ifndef CONFIG_CIFS_ROOT
···
 	ctx->reparse_type = CIFS_REPARSE_TYPE_DEFAULT;
 	ctx->symlink_type = CIFS_SYMLINK_TYPE_DEFAULT;
 	ctx->nonativesocket = 0;
+
+	ctx->unicode = -1; /* autodetect, but prefer UNICODE mode */
 
 /*
  *	short int override_uid = -1;

fs/smb/client/fs_context.h

···
 	Opt_witness,
 	Opt_is_upcall_target_mount,
 	Opt_is_upcall_target_application,
+	Opt_unicode,
 
 	/* Mount options which take numeric value */
 	Opt_backupuid,
···
 	bool compress; /* enable SMB2 messages (READ/WRITE) de/compression */
 	bool rootfs:1; /* if it's a SMB root file system */
 	bool witness:1; /* use witness protocol */
+	int unicode;
 	char *leaf_fullpath;
 	struct cifs_ses *dfs_root_ses;
 	bool dfs_automount:1; /* set for dfs automount only */

fs/smb/client/link.c

···
 	case CIFS_SYMLINK_TYPE_NATIVE:
 	case CIFS_SYMLINK_TYPE_NFS:
 	case CIFS_SYMLINK_TYPE_WSL:
-		if (server->ops->create_reparse_symlink) {
+		if (server->ops->create_reparse_symlink &&
+		    (le32_to_cpu(pTcon->fsAttrInfo.Attributes) & FILE_SUPPORTS_REPARSE_POINTS)) {
 			rc = server->ops->create_reparse_symlink(xid, inode,
 								 direntry,
 								 pTcon,

fs/smb/client/sess.c

···
 
 			iface->num_channels++;
 			iface->weight_fulfilled++;
-			cifs_dbg(VFS, "successfully opened new channel on iface:%pIS\n",
+			cifs_info("successfully opened new channel on iface:%pIS\n",
 				 &iface->sockaddr);
 			break;
 		}
···
 	ctx->password = ses->password;
 	ctx->sectype = ses->sectype;
 	ctx->sign = ses->sign;
+	ctx->unicode = ses->unicode;
 
 	/* UNC and paths */
 	/* XXX: Use ses->server->hostname? */
···
 	ctx->sockopt_tcp_nodelay = ses->server->tcp_nodelay;
 	ctx->echo_interval = ses->server->echo_interval / HZ;
 	ctx->max_credits = ses->server->max_credits;
+	ctx->min_offload = ses->server->min_offload;
+	ctx->compress = ses->server->compression.requested;
+	ctx->dfs_conn = ses->server->dfs_conn;
+	ctx->ignore_signature = ses->server->ignore_signature;
+	ctx->leaf_fullpath = ses->server->leaf_fullpath;
+	ctx->rootfs = ses->server->noblockcnt;
+	ctx->retrans = ses->server->retrans;
 
 	/*
 	 * This will be used for encoding/decoding user/domain/pw

fs/smb/client/smb1ops.c

···
 	.cap_unix = CAP_UNIX,
 	.cap_nt_find = CAP_NT_SMBS | CAP_NT_FIND,
 	.cap_large_files = CAP_LARGE_FILES,
+	.cap_unicode = CAP_UNICODE,
 	.signing_enabled = SECMODE_SIGN_ENABLED,
 	.signing_required = SECMODE_SIGN_REQUIRED,
 };

fs/smb/client/smb2inode.c

···
 	int rc;
 	int i;
 
+	/*
+	 * If server filesystem does not support reparse points then do not
+	 * attempt to create reparse point. This will prevent creating unusable
+	 * empty object on the server.
+	 */
+	if (!(le32_to_cpu(tcon->fsAttrInfo.Attributes) & FILE_SUPPORTS_REPARSE_POINTS))
+		return ERR_PTR(-EOPNOTSUPP);
+
 	oparms = CIFS_OPARMS(cifs_sb, tcon, full_path,
 			     SYNCHRONIZE | DELETE |
 			     FILE_READ_ATTRIBUTES |

fs/smb/client/smb2misc.c

···
 		WARN_ONCE(tcon->tc_count < 0, "tcon refcount is negative");
 		spin_unlock(&cifs_tcp_ses_lock);
 
-		if (tcon->ses)
+		if (tcon->ses) {
 			server = tcon->ses->server;
-
-		cifs_server_dbg(FYI, "tid=0x%x: tcon is closing, skipping async close retry of fid %llu %llu\n",
-				tcon->tid, persistent_fid, volatile_fid);
+			cifs_server_dbg(FYI,
+					"tid=0x%x: tcon is closing, skipping async close retry of fid %llu %llu\n",
+					tcon->tid, persistent_fid, volatile_fid);
+		}
 
 		return 0;
 	}

fs/smb/client/smb2ops.c

···
 			if (islink)
 				rc = -EREMOTE;
 		}
-		if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb &&
+		if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) &&
 		    (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS))
 			rc = -EOPNOTSUPP;
 		goto out;
···
 			  const char *full_path, umode_t mode, dev_t dev)
 {
 	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
-	int rc;
+	int rc = -EOPNOTSUPP;
 
 	/*
 	 * Check if mounted with mount parm 'sfu' mount parm.
···
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
 		rc = cifs_sfu_make_node(xid, inode, dentry, tcon,
 					full_path, mode, dev);
-	} else {
+	} else if (le32_to_cpu(tcon->fsAttrInfo.Attributes) & FILE_SUPPORTS_REPARSE_POINTS) {
 		rc = smb2_mknod_reparse(xid, inode, dentry, tcon,
 					full_path, mode, dev);
 	}

fs/smb/client/smb2pdu.c

···
 	       u64 persistent_fid, u64 volatile_fid,
 	       void **data, u32 *plen, u32 extra_info)
 {
-	__u32 additional_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
-				extra_info;
 	*plen = 0;
 
 	return query_info(xid, tcon, persistent_fid, volatile_fid,
-			  0, SMB2_O_INFO_SECURITY, additional_info,
+			  0, SMB2_O_INFO_SECURITY, extra_info,
 			  SMB2_MAX_BUFFER_SIZE, MIN_SEC_DESC_LEN, data, plen);
 }
 

fs/smb/client/transport.c

···
  * Our basic "send data to server" function. Should be called with srv_mutex
  * held. The caller is responsible for handling the results.
  */
-static int
+int
 smb_send_kvec(struct TCP_Server_Info *server, struct msghdr *smb_msg,
 	      size_t *sent)
 {

fs/smb/client/xattr.c

···
 		if (pTcon->ses->server->ops->get_acl == NULL)
 			goto out; /* rc already EOPNOTSUPP */
 
-		if (handler->flags == XATTR_CIFS_NTSD_FULL) {
-			extra_info = SACL_SECINFO;
-		} else {
-			extra_info = 0;
+		switch (handler->flags) {
+		case XATTR_CIFS_NTSD_FULL:
+			extra_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO | SACL_SECINFO;
+			break;
+		case XATTR_CIFS_NTSD:
+			extra_info = OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO;
+			break;
+		case XATTR_CIFS_ACL:
+		default:
+			extra_info = DACL_SECINFO;
+			break;
 		}
 		pacl = pTcon->ses->server->ops->get_acl(cifs_sb,
 				inode, full_path, &acllen, extra_info);