s3:smbd: implement SMB2 Flush

This works only on file shares yet.

metze

4 files changed, 123 insertions, 1 deletions

diff --git a/source3/Makefile.in b/source3/Makefile.in
index 0f3a74f08d..82937f5a07 100644
--- a/source3/Makefile.in
+++ b/source3/Makefile.in
@@ -754,6 +754,7 @@ SMBD_OBJ_SRV = smbd/files.o smbd/chgpasswd.o smbd/connection.o \
 	       smbd/smb2_sesssetup.o smbd/smb2_tcon.o smbd/smb2_glue.o \
 	       smbd/smb2_create.o \
 	       smbd/smb2_close.o \
+	       smbd/smb2_flush.o \
 	       smbd/smb2_keepalive.o smbd/smb2_signing.o \
 	       $(MANGLE_OBJ) @VFS_STATIC@
 
diff --git a/source3/smbd/globals.h b/source3/smbd/globals.h
index cde2f20ae2..3afb3d47ea 100644
--- a/source3/smbd/globals.h
+++ b/source3/smbd/globals.h
@@ -198,6 +198,7 @@ NTSTATUS smbd_smb2_request_process_tcon(struct smbd_smb2_request *req);
 NTSTATUS smbd_smb2_request_process_tdis(struct smbd_smb2_request *req);
 NTSTATUS smbd_smb2_request_process_create(struct smbd_smb2_request *req);
 NTSTATUS smbd_smb2_request_process_close(struct smbd_smb2_request *req);
+NTSTATUS smbd_smb2_request_process_flush(struct smbd_smb2_request *req);
 NTSTATUS smbd_smb2_request_process_keepalive(struct smbd_smb2_request *req);
 
 struct smbd_smb2_request {
diff --git a/source3/smbd/smb2_flush.c b/source3/smbd/smb2_flush.c
new file mode 100644
index 0000000000..5164d1b4a4
--- /dev/null
+++ b/source3/smbd/smb2_flush.c
@@ -0,0 +1,120 @@
+/*
+   Unix SMB/CIFS implementation.
+   Core SMB2 server
+
+   Copyright (C) Stefan Metzmacher 2009
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "smbd/globals.h"
+#include "../source4/libcli/smb2/smb2_constants.h"
+
+static NTSTATUS smbd_smb2_flush(struct smbd_smb2_request *req,
+				uint64_t in_file_id_volatile);
+
+NTSTATUS smbd_smb2_request_process_flush(struct smbd_smb2_request *req)
+{
+	const uint8_t *inhdr;
+	const uint8_t *inbody;
+	int i = req->current_idx;
+	DATA_BLOB outbody;
+	size_t expected_body_size = 0x18;
+	size_t body_size;
+	uint64_t in_file_id_persistent;
+	uint64_t in_file_id_volatile;
+	NTSTATUS status;
+
+	inhdr = (const uint8_t *)req->in.vector[i+0].iov_base;
+	if (req->in.vector[i+1].iov_len != (expected_body_size & 0xFFFFFFFE)) {
+		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+	}
+
+	inbody = (const uint8_t *)req->in.vector[i+1].iov_base;
+
+	body_size = SVAL(inbody, 0x00);
+	if (body_size != expected_body_size) {
+		return smbd_smb2_request_error(req, NT_STATUS_INVALID_PARAMETER);
+	}
+
+	in_file_id_persistent	= BVAL(inbody, 0x08);
+	in_file_id_volatile	= BVAL(inbody, 0x10);
+
+	if (in_file_id_persistent != 0) {
+		return smbd_smb2_request_error(req, NT_STATUS_FILE_CLOSED);
+	}
+
+	status = smbd_smb2_flush(req,
+				 in_file_id_volatile);
+	if (!NT_STATUS_IS_OK(status)) {
+		return smbd_smb2_request_error(req, status);
+	}
+
+	outbody = data_blob_talloc(req->out.vector, NULL, 0x10);
+	if (outbody.data == NULL) {
+		return smbd_smb2_request_error(req, NT_STATUS_NO_MEMORY);
+	}
+
+	SSVAL(outbody.data, 0x00, 0x04);	/* struct size */
+	SSVAL(outbody.data, 0x02, 0);		/* reserved */
+
+	return smbd_smb2_request_done(req, outbody, NULL);
+}
+
+static NTSTATUS smbd_smb2_flush(struct smbd_smb2_request *req,
+				uint64_t in_file_id_volatile)
+{
+	NTSTATUS status;
+	struct smb_request *smbreq;
+	connection_struct *conn = req->tcon->compat_conn;
+	files_struct *fsp;
+
+	DEBUG(10,("smbd_smb2_flush: file_id[0x%016llX]\n",
+		  (unsigned long long)in_file_id_volatile));
+
+	smbreq = smbd_smb2_fake_smb_request(req);
+	if (smbreq == NULL) {
+		return NT_STATUS_NO_MEMORY;
+	}
+
+	/* If it's an IPC, pass off the pipe handler. */
+	if (IS_IPC(conn)) {
+		return NT_STATUS_NOT_IMPLEMENTED;
+	}
+
+	fsp = file_fsp(smbreq, (uint16_t)in_file_id_volatile);
+	if (fsp == NULL) {
+		return NT_STATUS_FILE_CLOSED;
+	}
+	if (conn != fsp->conn) {
+		return NT_STATUS_FILE_CLOSED;
+	}
+	if (req->session->vuid != fsp->vuid) {
+		return NT_STATUS_FILE_CLOSED;
+	}
+
+	if (!CHECK_WRITE(fsp)) {
+		return NT_STATUS_ACCESS_DENIED;
+	}
+
+	status = sync_file(conn, fsp, true);
+	if (!NT_STATUS_IS_OK(status)) {
+		DEBUG(5,("smbd_smb2_flush: sync_file for %s returned %s\n",
+			fsp->fsp_name, nt_errstr(status)));
+		return status;
+	}
+
+	return NT_STATUS_OK;
+}
diff --git a/source3/smbd/smb2_server.c b/source3/smbd/smb2_server.c
index 611e1b382c..54acf55529 100644
--- a/source3/smbd/smb2_server.c
+++ b/source3/smbd/smb2_server.c
@@ -388,7 +388,7 @@ static NTSTATUS smbd_smb2_request_dispatch(struct smbd_smb2_request *req)
 		if (!NT_STATUS_IS_OK(status)) {
 			return smbd_smb2_request_error(req, status);
 		}
-		return smbd_smb2_request_error(req, NT_STATUS_NOT_IMPLEMENTED);
+		return smbd_smb2_request_process_flush(req);
 
 	case SMB2_OP_READ:
 		if (!NT_STATUS_IS_OK(session_status)) {