bcachefs: Don't log errors that are expected during shutdown

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

fs/bcachefs/io.c

@@ -1222,7 +1222,8 @@ void bch2_write(struct closure *cl)
 
 	if (c->opts.nochanges ||
 	    !percpu_ref_tryget(&c->writes)) {
-		__bcache_io_error(c, "read only");
+		if (!(op->flags & BCH_WRITE_FROM_INTERNAL))
+			__bcache_io_error(c, "read only");
 		op->error = -EROFS;
 		goto err;
 	}

fs/bcachefs/io.h

@@ -35,10 +35,11 @@ enum bch_write_flags {
 	BCH_WRITE_ONLY_SPECIFIED_DEVS	= (1 << 6),
 	BCH_WRITE_NOPUT_RESERVATION	= (1 << 7),
 	BCH_WRITE_WROTE_DATA_INLINE	= (1 << 8),
+	BCH_WRITE_FROM_INTERNAL		= (1 << 9),
 
 	/* Internal: */
-	BCH_WRITE_JOURNAL_SEQ_PTR	= (1 << 9),
-	BCH_WRITE_SKIP_CLOSURE_PUT	= (1 << 10),
+	BCH_WRITE_JOURNAL_SEQ_PTR	= (1 << 10),
+	BCH_WRITE_SKIP_CLOSURE_PUT	= (1 << 11),
 };
 
 static inline u64 *op_journal_seq(struct bch_write_op *op)

fs/bcachefs/move.c

@@ -242,7 +242,8 @@ int bch2_migrate_write_init(struct bch_fs *c, struct migrate_write *m,
 	m->op.flags |= BCH_WRITE_ONLY_SPECIFIED_DEVS|
 		BCH_WRITE_PAGES_STABLE|
 		BCH_WRITE_PAGES_OWNED|
-		BCH_WRITE_DATA_ENCODED;
+		BCH_WRITE_DATA_ENCODED|
+		BCH_WRITE_FROM_INTERNAL;
 
 	m->op.nr_replicas	= 1;
 	m->op.nr_replicas_required = 1;