fs/bcachefs/subvolume_types.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _BCACHEFS_SUBVOLUME_TYPES_H
   3 #define _BCACHEFS_SUBVOLUME_TYPES_H
   4
   5 #include "darray.h"
   6
   7 typedef DARRAY(u32) snapshot_id_list;
   8
   9 #define IS_ANCESTOR_BITMAP      128
  10
  11 struct snapshot_t {
  12         u32                     parent;
  13         u32                     skip[3];
  14         u32                     depth;
  15         u32                     children[2];
  16         u32                     subvol; /* Nonzero only if a subvolume points to this node: */
  17         u32                     tree;
  18         u32                     equiv;
  19         unsigned long           is_ancestor[BITS_TO_LONGS(IS_ANCESTOR_BITMAP)];
  20 };
  21
  22 struct snapshot_table {
  23 #ifndef RUST_BINDGEN
  24         DECLARE_FLEX_ARRAY(struct snapshot_t, s);
  25 #else
  26         struct snapshot_t       s[0];
  27 #endif
  28 };
  29
  30 typedef struct {
  31         u32             subvol;
  32         u64             inum;
  33 } subvol_inum;
  34
  35 #endif /* _BCACHEFS_SUBVOLUME_TYPES_H */