Yes, that's indeed what happens. here's a patch from upstream svn:
ndex: nbd-server.c
===================================================================
--- nbd-server.c (revision 325)
+++ nbd-server.c (revision 326)
@@ -1220,8 +1220,12 @@
/* Try again because maybe media was read-only */
fi.fhandle = open(tmpname, O_RDONLY);
if(fi.fhandle != -1) {
- client->server->flags |= F_AUTOREADONLY;
- client->server->flags |= F_READONLY;
+ /* Opening the base file in copyonwrite mode is
+ * okay */
+ if(!(client->server->flags & F_COPYONWRITE)) {
+ client->server->flags |= F_AUTOREADONLY;
+ client->server->flags |= F_READONLY;
+ }
}
}
if(fi.fhandle == -1) {
nbd-server checks whether it can write to a file before doing stuff, and
sets the export to read-only when it can't. This is fine, but it needs
to special-case the copyonwrite case, which it didn't do. This patch
fixes that.
--
<Lo-lan-do> Home is where you have to wash the dishes.
-- #debian-devel, Freenode, 2004-09-22
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