From fafdb5e38c59e25af94afa091bacc717ae9a21af Mon Sep 17 00:00:00 2001
From: Volker Lendecke <vl@samba.org>
Date: Tue, 26 May 2020 22:21:14 +0200
Subject: [PATCH] libsmb: Add async cli_smb2_chkpath_send/recv()

Not converting the sync version to use it, it will go away very soon

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
---
 source3/libsmb/cli_smb2_fnum.c | 81 ++++++++++++++++++++++++++++++++++
 source3/libsmb/cli_smb2_fnum.h |  6 +++
 2 files changed, 87 insertions(+)

diff --git a/source3/libsmb/cli_smb2_fnum.c b/source3/libsmb/cli_smb2_fnum.c
index 40a4c82708e..be610a390aa 100644
--- a/source3/libsmb/cli_smb2_fnum.c
+++ b/source3/libsmb/cli_smb2_fnum.c
@@ -1540,6 +1540,87 @@ NTSTATUS cli_smb2_qpathinfo_basic(struct cli_state *cli,
 	return status;
 }
 
+struct cli_smb2_chkpath_state {
+	struct tevent_context *ev;
+	struct cli_state *cli;
+};
+
+static void cli_smb2_chkpath_opened(struct tevent_req *subreq);
+static void cli_smb2_chkpath_closed(struct tevent_req *subreq);
+
+struct tevent_req *cli_smb2_chkpath_send(
+	TALLOC_CTX *mem_ctx,
+	struct tevent_context *ev,
+	struct cli_state *cli,
+	const char *name)
+{
+	struct tevent_req *req = NULL, *subreq = NULL;
+	struct cli_smb2_chkpath_state *state = NULL;
+
+	req = tevent_req_create(
+		mem_ctx, &state, struct cli_smb2_chkpath_state);
+	if (req == NULL) {
+		return NULL;
+	}
+	state->ev = ev;
+	state->cli = cli;
+
+	/* Ensure this is a directory. */
+	subreq = cli_smb2_create_fnum_send(
+		state,				   /* mem_ctx */
+		ev,				   /* ev */
+		cli,				   /* cli */
+		name,				   /* fname */
+		0,				   /* create_flags */
+		SMB2_IMPERSONATION_IMPERSONATION,  /* impersonation_level */
+		FILE_READ_ATTRIBUTES,		   /* desired_access */
+		FILE_ATTRIBUTE_DIRECTORY,	   /* file_attributes */
+		FILE_SHARE_READ|
+		FILE_SHARE_WRITE|
+		FILE_SHARE_DELETE,		   /* share_access */
+		FILE_OPEN,			   /* create_disposition */
+		FILE_DIRECTORY_FILE,		   /* create_options */
+		NULL);				   /* in_cblobs */
+	if (tevent_req_nomem(subreq, req)) {
+		return tevent_req_post(req, ev);
+	}
+	tevent_req_set_callback(subreq, cli_smb2_chkpath_opened, req);
+	return req;
+}
+
+static void cli_smb2_chkpath_opened(struct tevent_req *subreq)
+{
+	struct tevent_req *req = tevent_req_callback_data(
+		subreq, struct tevent_req);
+	struct cli_smb2_chkpath_state *state = tevent_req_data(
+		req, struct cli_smb2_chkpath_state);
+	NTSTATUS status;
+	uint16_t fnum;
+
+	status = cli_smb2_create_fnum_recv(subreq, &fnum, NULL, NULL, NULL);
+	TALLOC_FREE(subreq);
+	if (tevent_req_nterror(req, status)) {
+		return;
+	}
+
+	subreq = cli_smb2_close_fnum_send(state, state->ev, state->cli, fnum);
+	if (tevent_req_nomem(subreq, req)) {
+		return;
+	}
+	tevent_req_set_callback(subreq, cli_smb2_chkpath_closed, req);
+}
+
+static void cli_smb2_chkpath_closed(struct tevent_req *subreq)
+{
+	NTSTATUS status = cli_smb2_close_fnum_recv(subreq);
+	tevent_req_simple_finish_ntstatus(subreq, status);
+}
+
+NTSTATUS cli_smb2_chkpath_recv(struct tevent_req *req)
+{
+	return tevent_req_simple_recv_ntstatus(req);
+}
+
 /***************************************************************
  Wrapper that allows SMB2 to check if a path is a directory.
  Synchronous only.
diff --git a/source3/libsmb/cli_smb2_fnum.h b/source3/libsmb/cli_smb2_fnum.h
index 78e219c923c..61a17cd6a97 100644
--- a/source3/libsmb/cli_smb2_fnum.h
+++ b/source3/libsmb/cli_smb2_fnum.h
@@ -103,6 +103,12 @@ NTSTATUS cli_smb2_qpathinfo_basic(struct cli_state *cli,
 NTSTATUS cli_smb2_qpathinfo_alt_name(struct cli_state *cli,
 			const char *name,
 			fstring alt_name);
+struct tevent_req *cli_smb2_chkpath_send(
+	TALLOC_CTX *mem_ctx,
+	struct tevent_context *ev,
+	struct cli_state *cli,
+	const char *name);
+NTSTATUS cli_smb2_chkpath_recv(struct tevent_req *req);
 NTSTATUS cli_smb2_chkpath(struct cli_state *cli,
 			const char *name);
 struct tevent_req *cli_smb2_query_info_fnum_send(
-- 
2.34.1