Convert cli_open to tevent_req

1 files changed, 102 insertions, 46 deletions

diff --git a/source3/libsmb/clifile.c b/source3/libsmb/clifile.c
index c492f2b01f..4293828214 100644
--- a/source3/libsmb/clifile.c
+++ b/source3/libsmb/clifile.c
@@ -998,17 +998,33 @@ uint8_t *smb_bytes_push_str(uint8_t *buf, bool ucs2,
  WARNING: if you open with O_WRONLY then getattrE won't work!
 ****************************************************************************/
 
-struct async_req *cli_open_send(TALLOC_CTX *mem_ctx, struct event_context *ev,
-				struct cli_state *cli,
-				const char *fname, int flags, int share_mode)
+struct cli_open_state {
+	uint16_t vwv[15];
+	int fnum;
+	struct iovec bytes;
+};
+
+static void cli_open_done(struct tevent_req *subreq);
+
+struct tevent_req *cli_open_create(TALLOC_CTX *mem_ctx,
+				   struct event_context *ev,
+				   struct cli_state *cli, const char *fname,
+				   int flags, int share_mode,
+				   struct tevent_req **psmbreq)
 {
-	unsigned openfn = 0;
-	unsigned accessmode = 0;
-	uint8_t additional_flags = 0;
+	struct tevent_req *req, *subreq;
+	struct cli_open_state *state;
+	unsigned openfn;
+	unsigned accessmode;
+	uint8_t additional_flags;
 	uint8_t *bytes;
-	uint16_t vwv[15];
-	struct async_req *result;
 
+	req = tevent_req_create(mem_ctx, &state, struct cli_open_state);
+	if (req == NULL) {
+		return NULL;
+	}
+
+	openfn = 0;
 	if (flags & O_CREAT) {
 		openfn |= (1<<4);
 	}
@@ -1037,63 +1053,96 @@ struct async_req *cli_open_send(TALLOC_CTX *mem_ctx, struct event_context *ev,
 		accessmode = 0xFF;
 	}
 
-	SCVAL(vwv + 0, 0, 0xFF);
-	SCVAL(vwv + 0, 1, 0);
-	SSVAL(vwv + 1, 0, 0);
-	SSVAL(vwv + 2, 0, 0);  /* no additional info */
-	SSVAL(vwv + 3, 0, accessmode);
-	SSVAL(vwv + 4, 0, aSYSTEM | aHIDDEN);
-	SSVAL(vwv + 5, 0, 0);
-	SIVAL(vwv + 6, 0, 0);
-	SSVAL(vwv + 8, 0, openfn);
-	SIVAL(vwv + 9, 0, 0);
-	SIVAL(vwv + 11, 0, 0);
-	SIVAL(vwv + 13, 0, 0);
+	SCVAL(state->vwv + 0, 0, 0xFF);
+	SCVAL(state->vwv + 0, 1, 0);
+	SSVAL(state->vwv + 1, 0, 0);
+	SSVAL(state->vwv + 2, 0, 0);  /* no additional info */
+	SSVAL(state->vwv + 3, 0, accessmode);
+	SSVAL(state->vwv + 4, 0, aSYSTEM | aHIDDEN);
+	SSVAL(state->vwv + 5, 0, 0);
+	SIVAL(state->vwv + 6, 0, 0);
+	SSVAL(state->vwv + 8, 0, openfn);
+	SIVAL(state->vwv + 9, 0, 0);
+	SIVAL(state->vwv + 11, 0, 0);
+	SIVAL(state->vwv + 13, 0, 0);
+
+	additional_flags = 0;
 
 	if (cli->use_oplocks) {
 		/* if using oplocks then ask for a batch oplock via
                    core and extended methods */
 		additional_flags =
 			FLAG_REQUEST_OPLOCK|FLAG_REQUEST_BATCH_OPLOCK;
-		SSVAL(vwv+2, 0, SVAL(vwv+2, 0) | 6);
+		SSVAL(state->vwv+2, 0, SVAL(state->vwv+2, 0) | 6);
 	}
 
-	bytes = talloc_array(talloc_tos(), uint8_t, 0);
+	bytes = talloc_array(state, uint8_t, 0);
 	bytes = smb_bytes_push_str(bytes, cli_ucs2(cli), fname,
 				   strlen(fname)+1, NULL);
-	if (bytes == NULL) {
+
+	if (tevent_req_nomem(bytes, req)) {
+		return tevent_req_post(req, ev);
+	}
+
+	state->bytes.iov_base = bytes;
+	state->bytes.iov_len = talloc_get_size(bytes);
+
+	subreq = cli_smb_req_create(state, ev, cli, SMBopenX, additional_flags,
+				    15, state->vwv, 1, &state->bytes);
+	if (subreq == NULL) {
+		TALLOC_FREE(req);
 		return NULL;
 	}
+	tevent_req_set_callback(subreq, cli_open_done, req);
+	*psmbreq = subreq;
+	return req;
+}
 
-	result = cli_request_send(mem_ctx, ev, cli, SMBopenX, additional_flags,
-				  15, vwv, 0, talloc_get_size(bytes), bytes);
-	TALLOC_FREE(bytes);
-	return result;
+struct tevent_req *cli_open_send(TALLOC_CTX *mem_ctx, struct event_context *ev,
+				 struct cli_state *cli, const char *fname,
+				 int flags, int share_mode)
+{
+	struct tevent_req *req, *subreq;
+
+	req = cli_open_create(mem_ctx, ev, cli, fname, flags, share_mode,
+			      &subreq);
+	if ((req == NULL) || !cli_smb_req_send(subreq)) {
+		TALLOC_FREE(req);
+		return NULL;
+	}
+	return req;
 }
 
-NTSTATUS cli_open_recv(struct async_req *req, int *fnum)
+static void cli_open_done(struct tevent_req *subreq)
 {
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct cli_open_state *state = tevent_req_data(
+		req, struct cli_open_state);
 	uint8_t wct;
 	uint16_t *vwv;
-	uint16_t num_bytes;
-	uint8_t *bytes;
 	NTSTATUS status;
 
-	if (async_req_is_nterror(req, &status)) {
-		return status;
-	}
-
-	status = cli_pull_reply(req, &wct, &vwv, &num_bytes, &bytes);
+	status = cli_smb_recv(subreq, 3, &wct, &vwv, NULL, NULL);
 	if (!NT_STATUS_IS_OK(status)) {
-		return status;
-	}
-
-	if (wct < 3) {
-		return NT_STATUS_INVALID_NETWORK_RESPONSE;
+		TALLOC_FREE(subreq);
+		tevent_req_nterror(req, status);
+		return;
 	}
+	state->fnum = SVAL(vwv+2, 0);
+	tevent_req_done(req);
+}
 
-	*fnum = SVAL(vwv+2, 0);
+NTSTATUS cli_open_recv(struct tevent_req *req, int *fnum)
+{
+	struct cli_open_state *state = tevent_req_data(
+		req, struct cli_open_state);
+	NTSTATUS status;
 
+	if (tevent_req_is_nterror(req, &status)) {
+		return status;
+	}
+	*fnum = state->fnum;
 	return NT_STATUS_OK;
 }
 
@@ -1102,34 +1151,41 @@ int cli_open(struct cli_state *cli, const char *fname, int flags,
 {
 	TALLOC_CTX *frame = talloc_stackframe();
 	struct event_context *ev;
-	struct async_req *req;
+	struct tevent_req *req;
+	NTSTATUS status = NT_STATUS_OK;
 	int result = -1;
 
-	if (cli->fd_event != NULL) {
+	if (cli_has_async_calls(cli)) {
 		/*
 		 * Can't use sync call while an async call is in flight
 		 */
-		cli_set_error(cli, NT_STATUS_INVALID_PARAMETER);
+		status = NT_STATUS_INVALID_PARAMETER;
 		goto fail;
 	}
 
 	ev = event_context_init(frame);
 	if (ev == NULL) {
+		status = NT_STATUS_NO_MEMORY;
 		goto fail;
 	}
 
 	req = cli_open_send(frame, ev, cli, fname, flags, share_mode);
 	if (req == NULL) {
+		status = NT_STATUS_NO_MEMORY;
 		goto fail;
 	}
 
-	while (req->state < ASYNC_REQ_DONE) {
-		event_loop_once(ev);
+	if (!tevent_req_poll(req, ev)) {
+		status = map_nt_error_from_unix(errno);
+		goto fail;
 	}
 
 	cli_open_recv(req, &result);
  fail:
 	TALLOC_FREE(frame);
+	if (!NT_STATUS_IS_OK(status)) {
+		cli_set_error(cli, status);
+	}
 	return result;
 }