s3:libsmb: add smb2cli_flush*()

Based on the initial patch from Volker Lendecke <vl@samba.org>.

metze

source3/Makefile.in

@@ -607,6 +607,7 @@ LIBSMB_OBJ = libsmb/clientgen.o libsmb/cliconnect.o libsmb/clifile.o \
 	     libsmb/smb2cli_create.o \
 	     ../libcli/smb/smb2_create_blob.o \
 	     libsmb/smb2cli_close.o \
+	     libsmb/smb2cli_flush.o \
 	     libsmb/cli_np_tstream.o \
 	     libsmb/smbsock_connect.o \
 	     $(LIBSAMBA_OBJ) \

source3/libsmb/smb2cli.h

@@ -94,4 +94,14 @@ NTSTATUS smb2cli_close_recv(struct tevent_req *req);
 NTSTATUS smb2cli_close(struct cli_state *cli, uint16_t flags,
 			uint64_t fid_persistent, uint64_t fid_volatile);
 
+struct tevent_req *smb2cli_flush_send(TALLOC_CTX *mem_ctx,
+				      struct tevent_context *ev,
+				      struct cli_state *cli,
+				      uint64_t fid_persistent,
+				      uint64_t fid_volatile);
+NTSTATUS smb2cli_flush_recv(struct tevent_req *req);
+NTSTATUS smb2cli_flush(struct cli_state *cli,
+		       uint64_t fid_persistent,
+		       uint64_t fid_volatile);
+
 #endif /* __SMB2CLI_H__ */

source3/libsmb/smb2cli_flush.c

@@ -0,0 +1,116 @@
+/*
+   Unix SMB/CIFS implementation.
+   smb2 lib
+   Copyright (C) Volker Lendecke 2011
+
+   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 "client.h"
+#include "async_smb.h"
+#include "smb2cli_base.h"
+#include "smb2cli.h"
+#include "libsmb/proto.h"
+#include "lib/util/tevent_ntstatus.h"
+
+struct smb2cli_flush_state {
+	uint8_t fixed[24];
+};
+
+static void smb2cli_flush_done(struct tevent_req *subreq);
+
+struct tevent_req *smb2cli_flush_send(TALLOC_CTX *mem_ctx,
+				       struct tevent_context *ev,
+				       struct cli_state *cli,
+				       uint64_t fid_persistent,
+				       uint64_t fid_volatile)
+{
+	struct tevent_req *req, *subreq;
+	struct smb2cli_flush_state *state;
+	uint8_t *fixed;
+
+	req = tevent_req_create(mem_ctx, &state,
+				struct smb2cli_flush_state);
+	if (req == NULL) {
+		return NULL;
+	}
+	fixed = state->fixed;
+	SSVAL(fixed, 0, 24);
+	SBVAL(fixed, 8, fid_persistent);
+	SBVAL(fixed, 16, fid_volatile);
+
+	subreq = smb2cli_req_send(state, ev, cli, SMB2_OP_FLUSH, 0,
+				  state->fixed, sizeof(state->fixed),
+				  NULL, 0);
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, smb2cli_flush_done, req);
+	return req;
+}
+
+static void smb2cli_flush_done(struct tevent_req *subreq)
+{
+	struct tevent_req *req =
+		tevent_req_callback_data(subreq,
+		struct tevent_req);
+	NTSTATUS status;
+	struct iovec *iov;
+
+	status = smb2cli_req_recv(subreq, talloc_tos(), &iov, 60);
+	if (tevent_req_nterror(req, status)) {
+		return;
+	}
+	tevent_req_done(req);
+}
+
+NTSTATUS smb2cli_flush_recv(struct tevent_req *req)
+{
+	return tevent_req_simple_recv_ntstatus(req);
+}
+
+NTSTATUS smb2cli_flush(struct cli_state *cli,
+		       uint64_t fid_persistent,
+		       uint64_t fid_volatile)
+{
+	TALLOC_CTX *frame = talloc_stackframe();
+	struct event_context *ev;
+	struct tevent_req *req;
+	NTSTATUS status = NT_STATUS_NO_MEMORY;
+
+	if (cli_has_async_calls(cli)) {
+		/*
+		 * Can't use sync call while an async call is in flight
+		 */
+		status = NT_STATUS_INVALID_PARAMETER;
+		goto fail;
+	}
+	ev = event_context_init(frame);
+	if (ev == NULL) {
+		goto fail;
+	}
+	req = smb2cli_flush_send(frame, ev, cli,
+				 fid_persistent, fid_volatile);
+	if (req == NULL) {
+		goto fail;
+	}
+	if (!tevent_req_poll_ntstatus(req, ev, &status)) {
+		goto fail;
+	}
+	status = smb2cli_flush_recv(req);
+ fail:
+	TALLOC_FREE(frame);
+	return status;
+}

source3/wscript_build

@@ -142,6 +142,7 @@ LIBSMB_SRC = '''libsmb/clientgen.c libsmb/cliconnect.c libsmb/clifile.c
              libsmb/smb2cli_tcon.c
              libsmb/smb2cli_create.c
              libsmb/smb2cli_close.c
+             libsmb/smb2cli_flush.c
              libsmb/cli_np_tstream.c
              libsmb/reparse_symlink.c
              libsmb/clisymlink.c