[01/41] xfs: introduce realtime refcount btree definitions

Commit Message

Darrick J. Wong Dec. 30, 2022, 10:20 p.m. UTC

From: Darrick J. Wong <[e-mail]>

Add new realtime refcount btree definitions. The realtime refcount btree
will be rooted from a hidden inode, but has its own shape and therefore
needs to have most of its own separate types.

Signed-off-by: Darrick J. Wong <[e-mail]>
---
 libxfs/xfs_btree.h  |    1 +
 libxfs/xfs_format.h |    6 ++++++
 libxfs/xfs_types.h  |    5 +++--
 3 files changed, 10 insertions(+), 2 deletions(-)

Patch

diff --git a/libxfs/xfs_btree.h b/libxfs/xfs_btree.h
index 1d8656ca112..48dbb681cf3 100644
--- a/libxfs/xfs_btree.h
+++ b/libxfs/xfs_btree.h
@@ -65,6 +65,7 @@  union xfs_btree_rec {
 #define	XFS_BTNUM_REFC	((xfs_btnum_t)XFS_BTNUM_REFCi)
 #define	XFS_BTNUM_RCBAG	((xfs_btnum_t)XFS_BTNUM_RCBAGi)
 #define	XFS_BTNUM_RTRMAP ((xfs_btnum_t)XFS_BTNUM_RTRMAPi)
+#define	XFS_BTNUM_RTREFC ((xfs_btnum_t)XFS_BTNUM_RTREFCi)
 
 struct xfs_btree_ops;
 uint32_t xfs_btree_magic(struct xfs_mount *mp, const struct xfs_btree_ops *ops);
diff --git a/libxfs/xfs_format.h b/libxfs/xfs_format.h
index a2b8d8ee8af..c78fe8e78b8 100644
--- a/libxfs/xfs_format.h
+++ b/libxfs/xfs_format.h
@@ -1796,6 +1796,12 @@  struct xfs_refcount_key {
 /* btree pointer type */
 typedef __be32 xfs_refcount_ptr_t;
 
+/*
+ * Realtime Reference Count btree format definitions
+ *
+ * This is a btree for reference count records for realtime volumes
+ */
+#define	XFS_RTREFC_CRC_MAGIC	0x52434e54	/* 'RCNT' */
 
 /*
  * BMAP Btree format definitions
diff --git a/libxfs/xfs_types.h b/libxfs/xfs_types.h
index e6a4f4a7d00..92c60a9d586 100644
--- a/libxfs/xfs_types.h
+++ b/libxfs/xfs_types.h
@@ -126,7 +126,7 @@  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_RCBAGi,
-	XFS_BTNUM_RTRMAPi, XFS_BTNUM_MAX
+	XFS_BTNUM_RTRMAPi, XFS_BTNUM_RTREFCi, XFS_BTNUM_MAX
 } xfs_btnum_t;
 
 #define XFS_BTNUM_STRINGS \
@@ -138,7 +138,8 @@  typedef enum {
 	{ XFS_BTNUM_FINOi,	"finobt" }, \
 	{ XFS_BTNUM_REFCi,	"refcbt" }, \
 	{ XFS_BTNUM_RCBAGi,	"rcbagbt" }, \
-	{ XFS_BTNUM_RTRMAPi,	"rtrmapbt" }
+	{ XFS_BTNUM_RTRMAPi,	"rtrmapbt" }, \
+	{ XFS_BTNUM_RTREFCi,	"rtrefcbt" }
 
 struct xfs_name {
 	const unsigned char	*name;