__bch2_fs_stop(c);
}
+/*
+ * bcachefs doesn't currently integrate intwrite freeze protection but the
+ * internal write references serve the same purpose. Therefore reuse the
+ * read-only transition code to perform the quiesce. The caveat is that we don't
+ * currently have the ability to block tasks that want a write reference while
+ * the superblock is frozen. This is fine for now, but we should either add
+ * blocking support or find a way to integrate sb_start_intwrite() and friends.
+ */
+static int bch2_freeze(struct super_block *sb)
+{
+ struct bch_fs *c = sb->s_fs_info;
+
+ down_write(&c->state_lock);
+ bch2_fs_read_only(c);
+ up_write(&c->state_lock);
+ return 0;
+}
+
+static int bch2_unfreeze(struct super_block *sb)
+{
+ struct bch_fs *c = sb->s_fs_info;
+ int ret;
+
+ down_write(&c->state_lock);
+ ret = bch2_fs_read_write(c);
+ up_write(&c->state_lock);
+ return ret;
+}
+
static const struct super_operations bch_super_operations = {
.alloc_inode = bch2_alloc_inode,
.destroy_inode = bch2_destroy_inode,
.show_options = bch2_show_options,
.remount_fs = bch2_remount,
.put_super = bch2_put_super,
-#if 0
.freeze_fs = bch2_freeze,
.unfreeze_fs = bch2_unfreeze,
-#endif
};
static int bch2_set_super(struct super_block *s, void *data)