From 6bfb320ff03dd89d1b9b584516b7e20830d2cdb5 Mon Sep 17 00:00:00 2001
From: "Richard W.M. Jones" <rjones@redhat.com>
Date: Fri, 30 May 2025 13:32:00 +0100
Subject: [PATCH] vddk: Cache the readonly flag from the .open call in the
 handle

(cherry picked from commit 0d953ea644f44259edb19c97e3c7863794c0ca1c)
---
 plugins/vddk/vddk.c | 1 +
 plugins/vddk/vddk.h | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/plugins/vddk/vddk.c b/plugins/vddk/vddk.c
index 2a787453..468971f4 100644
--- a/plugins/vddk/vddk.c
+++ b/plugins/vddk/vddk.c
@@ -699,6 +699,7 @@ vddk_open (int readonly)
     nbdkit_error ("calloc: %m");
     return NULL;
   }
+  h->readonly = readonly;
   h->commands = (command_queue) empty_vector;
   pthread_mutex_init (&h->commands_lock, NULL);
   pthread_cond_init (&h->commands_cond, NULL);
diff --git a/plugins/vddk/vddk.h b/plugins/vddk/vddk.h
index 1d1069cc..3586c5da 100644
--- a/plugins/vddk/vddk.h
+++ b/plugins/vddk/vddk.h
@@ -166,6 +166,9 @@ struct vddk_handle {
   pthread_cond_t commands_cond;    /* condition (queue size 0 -> 1) */
   uint64_t id;                     /* next command ID */
 
+  /* Cached readonly flag from the open call. */
+  int readonly;
+
   /* Cached disk size in bytes (set in get_size()). */
   uint64_t size;
 };
-- 
2.47.1