Merge tag '4.17-rc4-SMB3-Fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "Some small SMB3 fixes for 4.17-rc5, some for stable"

* tag '4.17-rc4-SMB3-Fixes' of git://git.samba.org/sfrench/cifs-2.6:
  smb3: directory sync should not return an error
  cifs: smb2ops: Fix listxattr() when there are no EAs
  cifs: smbd: Enable signing with smbdirect
  cifs: Allocate validate negotiation request through kmalloc

Author: torvalds

fs/cifs/cifsfs.c

@@ -1047,6 +1047,18 @@ ssize_t cifs_file_copychunk_range(unsigned int xid,
 	return rc;
 }
 
+/*
+ * Directory operations under CIFS/SMB2/SMB3 are synchronous, so fsync()
+ * is a dummy operation.
+ */
+static int cifs_dir_fsync(struct file *file, loff_t start, loff_t end, int datasync)
+{
+	cifs_dbg(FYI, "Sync directory - name: %pD datasync: 0x%x\n",
+		 file, datasync);
+
+	return 0;
+}
+
 static ssize_t cifs_copy_file_range(struct file *src_file, loff_t off,
 				struct file *dst_file, loff_t destoff,
 				size_t len, unsigned int flags)
@@ -1181,6 +1193,7 @@ const struct file_operations cifs_dir_ops = {
 	.copy_file_range = cifs_copy_file_range,
 	.clone_file_range = cifs_clone_file_range,
 	.llseek = generic_file_llseek,
+	.fsync = cifs_dir_fsync,
 };
 
 static void

fs/cifs/connect.c

@@ -1977,14 +1977,6 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
 		goto cifs_parse_mount_err;
 	}
 
-#ifdef CONFIG_CIFS_SMB_DIRECT
-	if (vol->rdma && vol->sign) {
-		cifs_dbg(VFS, "Currently SMB direct doesn't support signing."
-			" This is being fixed\n");
-		goto cifs_parse_mount_err;
-	}
-#endif
-
 #ifndef CONFIG_KEYS
 	/* Muliuser mounts require CONFIG_KEYS support */
 	if (vol->multiuser) {

fs/cifs/smb2ops.c

@@ -589,9 +589,15 @@ smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon,
 
 	SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 
+	/*
+	 * If ea_name is NULL (listxattr) and there are no EAs, return 0 as it's
+	 * not an error. Otherwise, the specified ea_name was not found.
+	 */
 	if (!rc)
 		rc = move_smb2_ea_to_cifs(ea_data, buf_size, smb2_data,
 					  SMB2_MAX_EA_BUF, ea_name);
+	else if (!ea_name && rc == -ENODATA)
+		rc = 0;
 
 	kfree(smb2_data);
 	return rc;

fs/cifs/smb2pdu.c

@@ -730,19 +730,14 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 
 int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
 {
-	int rc = 0;
-	struct validate_negotiate_info_req vneg_inbuf;
+	int rc;
+	struct validate_negotiate_info_req *pneg_inbuf;
 	struct validate_negotiate_info_rsp *pneg_rsp = NULL;
 	u32 rsplen;
 	u32 inbuflen; /* max of 4 dialects */
 
 	cifs_dbg(FYI, "validate negotiate\n");
 
-#ifdef CONFIG_CIFS_SMB_DIRECT
-	if (tcon->ses->server->rdma)
-		return 0;
-#endif
-
 	/* In SMB3.11 preauth integrity supersedes validate negotiate */
 	if (tcon->ses->server->dialect == SMB311_PROT_ID)
 		return 0;
@@ -765,63 +760,69 @@ int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
 	if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
 		cifs_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n");
 
-	vneg_inbuf.Capabilities =
+	pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS);
+	if (!pneg_inbuf)
+		return -ENOMEM;
+
+	pneg_inbuf->Capabilities =
 			cpu_to_le32(tcon->ses->server->vals->req_capabilities);
-	memcpy(vneg_inbuf.Guid, tcon->ses->server->client_guid,
+	memcpy(pneg_inbuf->Guid, tcon->ses->server->client_guid,
 					SMB2_CLIENT_GUID_SIZE);
 
 	if (tcon->ses->sign)
-		vneg_inbuf.SecurityMode =
+		pneg_inbuf->SecurityMode =
 			cpu_to_le16(SMB2_NEGOTIATE_SIGNING_REQUIRED);
 	else if (global_secflags & CIFSSEC_MAY_SIGN)
-		vneg_inbuf.SecurityMode =
+		pneg_inbuf->SecurityMode =
 			cpu_to_le16(SMB2_NEGOTIATE_SIGNING_ENABLED);
 	else
-		vneg_inbuf.SecurityMode = 0;
+		pneg_inbuf->SecurityMode = 0;
 
 
 	if (strcmp(tcon->ses->server->vals->version_string,
 		SMB3ANY_VERSION_STRING) == 0) {
-		vneg_inbuf.Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
-		vneg_inbuf.Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
-		vneg_inbuf.DialectCount = cpu_to_le16(2);
+		pneg_inbuf->Dialects[0] = cpu_to_le16(SMB30_PROT_ID);
+		pneg_inbuf->Dialects[1] = cpu_to_le16(SMB302_PROT_ID);
+		pneg_inbuf->DialectCount = cpu_to_le16(2);
 		/* structure is big enough for 3 dialects, sending only 2 */
-		inbuflen = sizeof(struct validate_negotiate_info_req) - 2;
+		inbuflen = sizeof(*pneg_inbuf) -
+				sizeof(pneg_inbuf->Dialects[0]);
 	} else if (strcmp(tcon->ses->server->vals->version_string,
 		SMBDEFAULT_VERSION_STRING) == 0) {
-		vneg_inbuf.Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
-		vneg_inbuf.Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
-		vneg_inbuf.Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
-		vneg_inbuf.DialectCount = cpu_to_le16(3);
+		pneg_inbuf->Dialects[0] = cpu_to_le16(SMB21_PROT_ID);
+		pneg_inbuf->Dialects[1] = cpu_to_le16(SMB30_PROT_ID);
+		pneg_inbuf->Dialects[2] = cpu_to_le16(SMB302_PROT_ID);
+		pneg_inbuf->DialectCount = cpu_to_le16(3);
 		/* structure is big enough for 3 dialects */
-		inbuflen = sizeof(struct validate_negotiate_info_req);
+		inbuflen = sizeof(*pneg_inbuf);
 	} else {
 		/* otherwise specific dialect was requested */
-		vneg_inbuf.Dialects[0] =
+		pneg_inbuf->Dialects[0] =
 			cpu_to_le16(tcon->ses->server->vals->protocol_id);
-		vneg_inbuf.DialectCount = cpu_to_le16(1);
+		pneg_inbuf->DialectCount = cpu_to_le16(1);
 		/* structure is big enough for 3 dialects, sending only 1 */
-		inbuflen = sizeof(struct validate_negotiate_info_req) - 4;
+		inbuflen = sizeof(*pneg_inbuf) -
+				sizeof(pneg_inbuf->Dialects[0]) * 2;
 	}
 
 	rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 		FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
-		(char *)&vneg_inbuf, sizeof(struct validate_negotiate_info_req),
-		(char **)&pneg_rsp, &rsplen);
+		(char *)pneg_inbuf, inbuflen, (char **)&pneg_rsp, &rsplen);
 
 	if (rc != 0) {
 		cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
-		return -EIO;
+		rc = -EIO;
+		goto out_free_inbuf;
 	}
 
-	if (rsplen != sizeof(struct validate_negotiate_info_rsp)) {
+	rc = -EIO;
+	if (rsplen != sizeof(*pneg_rsp)) {
 		cifs_dbg(VFS, "invalid protocol negotiate response size: %d\n",
 			 rsplen);
 
 		/* relax check since Mac returns max bufsize allowed on ioctl */
-		if ((rsplen > CIFSMaxBufSize)
-		     || (rsplen < sizeof(struct validate_negotiate_info_rsp)))
-			goto err_rsp_free;
+		if (rsplen > CIFSMaxBufSize || rsplen < sizeof(*pneg_rsp))
+			goto out_free_rsp;
 	}
 
 	/* check validate negotiate info response matches what we got earlier */
@@ -838,15 +839,17 @@ int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
 		goto vneg_out;
 
 	/* validate negotiate successful */
+	rc = 0;
 	cifs_dbg(FYI, "validate negotiate info successful\n");
-	kfree(pneg_rsp);
-	return 0;
+	goto out_free_rsp;
 
 vneg_out:
 	cifs_dbg(VFS, "protocol revalidation - security settings mismatch\n");
-err_rsp_free:
+out_free_rsp:
 	kfree(pneg_rsp);
-	return -EIO;
+out_free_inbuf:
+	kfree(pneg_inbuf);
+	return rc;
 }
 
 enum securityEnum