smbd: Add "hide new files" option

See the manpage for the description

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>

2 files changed, 32 insertions, 1 deletions

diff --git a/docs-xml/smbdotconf/filename/hidenewfilestimeout.xml b/docs-xml/smbdotconf/filename/hidenewfilestimeout.xml
new file mode 100644
index 00000000000..ca93e726c33
--- /dev/null
+++ b/docs-xml/smbdotconf/filename/hidenewfilestimeout.xml
@@ -0,0 +1,15 @@
+<samba:parameter name="hide new files timeout"
+                 context="S"
+                 type="integer"
+                 xmlns:samba="http://www.samba.org/samba/DTD/samba-doc">
+ <description>
+   <para>Setting this parameter to something but 0 hides files
+   that have been modified less than N seconds ago.</para>
+   <para>It can be used for ingest/process queue style workloads. A
+   processing application should only see files that are definitely
+   finished. As many applications do not have proper external workflow
+   control, this can be a way to make sure processing does not
+   interfere with file ingest.</para>
+</description>
+<value type="default">0</value>
+</samba:parameter>
diff --git a/source3/smbd/dir.c b/source3/smbd/dir.c
index c3af5233e98..f05d7a290e5 100644
--- a/source3/smbd/dir.c
+++ b/source3/smbd/dir.c
@@ -1536,6 +1536,7 @@ bool is_visible_file(connection_struct *conn, const char *dir_path,
 	bool hide_unreadable = lp_hide_unreadable(SNUM(conn));
 	bool hide_unwriteable = lp_hide_unwriteable_files(SNUM(conn));
 	bool hide_special = lp_hide_special_files(SNUM(conn));
+	int hide_new_files_timeout = lp_hide_new_files_timeout(SNUM(conn));
 	char *entry = NULL;
 	struct smb_filename *smb_fname_base = NULL;
 	bool ret = false;
@@ -1550,7 +1551,11 @@ bool is_visible_file(connection_struct *conn, const char *dir_path,
 		return False;
 	}
 
-	if (hide_unreadable || hide_unwriteable || hide_special) {
+	if (hide_unreadable ||
+	    hide_unwriteable ||
+	    hide_special ||
+	    (hide_new_files_timeout != 0))
+	{
 		entry = talloc_asprintf(talloc_tos(), "%s/%s", dir_path, name);
 		if (!entry) {
 			ret = false;
@@ -1603,6 +1608,17 @@ bool is_visible_file(connection_struct *conn, const char *dir_path,
 			ret = false;
 			goto out;
 		}
+
+		if (hide_new_files_timeout != 0) {
+
+			double age = timespec_elapsed(
+				&smb_fname_base->st.st_ex_mtime);
+
+			if (age < (double)hide_new_files_timeout) {
+				ret = false;
+				goto out;
+			}
+		}
 	}
 
 	ret = true;