[PATCH 2/6] xfs: define an in-memory btree for storing refcount bag info during repairs

Darrick J. Wong
2023-12-31T22:22:38Z

Create a new in-memory btree type so that we can store refcount bag info
in a much more memory-efficient format.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
---
libxfs/xfs_btree.h | 1 +
libxfs/xfs_types.h | 6 ++++--
2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/libxfs/xfs_btree.h b/libxfs/xfs_btree.h
index edbcd4f0e98..339b5561e5b 100644
--- a/libxfs/xfs_btree.h
+++ b/libxfs/xfs_btree.h
@@ -62,6 +62,7 @@ union xfs_btree_rec {
#define XFS_BTNUM_FINO ((xfs_btnum_t)XFS_BTNUM_FINOi)
#define XFS_BTNUM_RMAP ((xfs_btnum_t)XFS_BTNUM_RMAPi)
#define XFS_BTNUM_REFC ((xfs_btnum_t)XFS_BTNUM_REFCi)
+#define XFS_BTNUM_RCBAG ((xfs_btnum_t)XFS_BTNUM_RCBAGi)

struct xfs_btree_ops;
uint32_t xfs_btree_magic(struct xfs_mount *mp, const struct xfs_btree_ops *ops);
diff --git a/libxfs/xfs_types.h b/libxfs/xfs_types.h
index 035bf703d71..5556615a2ff 100644
--- a/libxfs/xfs_types.h
+++ b/libxfs/xfs_types.h
@@ -121,7 +121,8 @@ typedef enum {
*/
typedef enum {
XFS_BTNUM_BNOi, XFS_BTNUM_CNTi, XFS_BTNUM_RMAPi, XFS_BTNUM_BMAPi,
- XFS_BTNUM_INOi, XFS_BTNUM_FINOi, XFS_BTNUM_REFCi, XFS_BTNUM_MAX
+ XFS_BTNUM_INOi, XFS_BTNUM_FINOi, XFS_BTNUM_REFCi, XFS_BTNUM_RCBAGi,
+ XFS_BTNUM_MAX
} xfs_btnum_t;

#define XFS_BTNUM_STRINGS \
@@ -131,7 +132,8 @@ typedef enum {
{ XFS_BTNUM_BMAPi, "bmbt" }, \
{ XFS_BTNUM_INOi, "inobt" }, \
{ XFS_BTNUM_FINOi, "finobt" }, \
- { XFS_BTNUM_REFCi, "refcbt" }
+ { XFS_BTNUM_REFCi, "refcbt" }, \
+ { XFS_BTNUM_RCBAGi, "rcbagbt" }

struct xfs_name {
const unsigned char *name;