1 files changed, 92 insertions, 0 deletions
diff --git a/fs/bcachefs/subvolume.h b/fs/bcachefs/subvolume.h
new file mode 100644
index 000000000000..f897d106e142
--- /dev/null
+++ b/fs/bcachefs/subvolume.h
@@ -0,0 +1,92 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _BCACHEFS_SUBVOLUME_H
+#define _BCACHEFS_SUBVOLUME_H
+
+#include "darray.h"
+#include "subvolume_types.h"
+
+enum bch_validate_flags;
+
+int bch2_check_subvols(struct bch_fs *);
+int bch2_check_subvol_children(struct bch_fs *);
+
+int bch2_subvolume_validate(struct bch_fs *, struct bkey_s_c, enum bch_validate_flags);
+void bch2_subvolume_to_text(struct printbuf *, struct bch_fs *, struct bkey_s_c);
+int bch2_subvolume_trigger(struct btree_trans *, enum btree_id, unsigned,
+			   struct bkey_s_c, struct bkey_s,
+			   enum btree_iter_update_trigger_flags);
+
+#define bch2_bkey_ops_subvolume ((struct bkey_ops) {		\
+	.key_validate	= bch2_subvolume_validate,		\
+	.val_to_text	= bch2_subvolume_to_text,		\
+	.trigger	= bch2_subvolume_trigger,		\
+	.min_val_size	= 16,					\
+})
+
+int bch2_subvol_has_children(struct btree_trans *, u32);
+int bch2_subvolume_get(struct btree_trans *, unsigned,
+		       bool, int, struct bch_subvolume *);
+int __bch2_subvolume_get_snapshot(struct btree_trans *, u32,
+				  u32 *, bool);
+int bch2_subvolume_get_snapshot(struct btree_trans *, u32, u32 *);
+
+int bch2_subvol_is_ro_trans(struct btree_trans *, u32);
+int bch2_subvol_is_ro(struct bch_fs *, u32);
+
+static inline struct bkey_s_c
+bch2_btree_iter_peek_in_subvolume_upto_type(struct btree_iter *iter, struct bpos end,
+					    u32 subvolid, unsigned flags)
+{
+	u32 snapshot;
+	int ret = bch2_subvolume_get_snapshot(iter->trans, subvolid, &snapshot);
+	if (ret)
+		return bkey_s_c_err(ret);
+
+	bch2_btree_iter_set_snapshot(iter, snapshot);
+	return bch2_btree_iter_peek_upto_type(iter, end, flags);
+}
+
+#define for_each_btree_key_in_subvolume_upto_continue(_trans, _iter,		\
+					 _end, _subvolid, _flags, _k, _do)	\
+({										\
+	struct bkey_s_c _k;							\
+	int _ret3 = 0;								\
+										\
+	do {									\
+		_ret3 = lockrestart_do(_trans, ({				\
+			(_k) = bch2_btree_iter_peek_in_subvolume_upto_type(&(_iter),	\
+						_end, _subvolid, (_flags));	\
+			if (!(_k).k)						\
+				break;						\
+										\
+			bkey_err(_k) ?: (_do);					\
+		}));								\
+	} while (!_ret3 && bch2_btree_iter_advance(&(_iter)));			\
+										\
+	bch2_trans_iter_exit((_trans), &(_iter));				\
+	_ret3;									\
+})
+
+#define for_each_btree_key_in_subvolume_upto(_trans, _iter, _btree_id,		\
+				_start, _end, _subvolid, _flags, _k, _do)	\
+({										\
+	struct btree_iter _iter;						\
+	bch2_trans_iter_init((_trans), &(_iter), (_btree_id),			\
+			     (_start), (_flags));				\
+										\
+	for_each_btree_key_in_subvolume_upto_continue(_trans, _iter,		\
+					_end, _subvolid, _flags, _k, _do);	\
+})
+
+int bch2_delete_dead_snapshots(struct bch_fs *);
+void bch2_delete_dead_snapshots_async(struct bch_fs *);
+
+int bch2_subvolume_unlink(struct btree_trans *, u32);
+int bch2_subvolume_create(struct btree_trans *, u64, u32, u32, u32 *, u32 *, bool);
+
+int bch2_initialize_subvolumes(struct bch_fs *);
+int bch2_fs_upgrade_for_subvolumes(struct bch_fs *);
+
+int bch2_fs_subvolumes_init(struct bch_fs *);
+
+#endif /* _BCACHEFS_SUBVOLUME_H */