cmd_dump: Also set read_only

In nochanges mode, without read_only, we can go into a fake rw mode
where we allow writes but hold them in memory.

That's not what we want for the dump tool - this fixes a bug where btree
nodes don't always get dumped correctly.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 1 insertions, 0 deletions

diff --git a/cmd_dump.c b/cmd_dump.c
index e1f0a5aa..bf570dc6 100644
--- a/cmd_dump.c
+++ b/cmd_dump.c
@@ -122,6 +122,7 @@ int cmd_dump(int argc, char *argv[])
 	bool force = false, entire_journal = true;
 	int fd, opt;
 
+	opt_set(opts, read_only,	true);
 	opt_set(opts, nochanges,	true);
 	opt_set(opts, norecovery,	true);
 	opt_set(opts, degraded,		true);