From: Ralph Boehme <slow@samba.org>
Date: Tue, 7 Oct 2025 16:40:32 +0000 (+0200)
Subject: smbd: add and use NTCREATEX_FLAG_PERSISTENT_OPEN
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=da58bd9733325ecd6667dcf7441ab14abde671e2;p=thirdparty%2Fsamba.git

smbd: add and use NTCREATEX_FLAG_PERSISTENT_OPEN

This will be used by the SMB2-CREATE code to request a Persistent Handle from
SMB_VFS_CREATE_FILE().

Signed-off-by: Ralph Boehme <slow@samba.org>
Reviewed-by: Anoop C S <anoopcs@samba.org>
---

diff --git a/source3/include/smb.h b/source3/include/smb.h
index 50e265f28b0..bbbd4a7ea3e 100644
--- a/source3/include/smb.h
+++ b/source3/include/smb.h
@@ -325,6 +325,7 @@ struct interface {
  */
 #define NTCREATEX_FLAG_DENY_DOS			0x0001
 #define NTCREATEX_FLAG_DENY_FCB			0x0002
+#define NTCREATEX_FLAG_PERSISTENT_OPEN		0x0004
 
 /* Private flag for streams support */
 #define NTCREATEX_FLAG_STREAM_BASEOPEN		0x0010
diff --git a/source3/smbd/files.c b/source3/smbd/files.c
index 363d169677e..fa2e86ce664 100644
--- a/source3/smbd/files.c
+++ b/source3/smbd/files.c
@@ -2714,4 +2714,13 @@ void fsp_apply_private_ntcreatex_flags(struct files_struct *fsp,
 	} else {
 		fsp->fsp_flags.ntcreatex_stream_baseopen = false;
 	}
+	if (flags & NTCREATEX_FLAG_PERSISTENT_OPEN) {
+		/*
+		 * Dereferencing op would crash anyway if NULL, but the assert
+		 * makes it more clear that op is expected when getting
+		 * NTCREATEX_FLAG_PERSISTENT_OPEN.
+		 */
+		SMB_ASSERT(fsp->op);
+		fsp->op->global->persistent = true;
+	}
 }