[02/47] xfs: introduce realtime rmap btree definitions

Commit Message

Darrick J. Wong Dec. 27, 2023, 1:11 p.m. UTC

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

Add new realtime rmap btree definitions. The realtime rmap 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 |    7 +++++++
 libxfs/xfs_types.h  |    5 +++--
 3 files changed, 11 insertions(+), 2 deletions(-)

Patch

diff --git a/libxfs/xfs_btree.h b/libxfs/xfs_btree.h
index ce0bc5dfffe..e6571c9157d 100644
--- a/libxfs/xfs_btree.h
+++ b/libxfs/xfs_btree.h
@@ -64,6 +64,7 @@  union xfs_btree_rec {
 #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)
+#define	XFS_BTNUM_RTRMAP ((xfs_btnum_t)XFS_BTNUM_RTRMAPi)
 
 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 87476c6bb6c..b47d4f16143 100644
--- a/libxfs/xfs_format.h
+++ b/libxfs/xfs_format.h
@@ -1746,6 +1746,13 @@  typedef __be32 xfs_rmap_ptr_t;
 	 XFS_FIBT_BLOCK(mp) + 1 : \
 	 XFS_IBT_BLOCK(mp) + 1)
 
+/*
+ * Realtime Reverse mapping btree format definitions
+ *
+ * This is a btree for reverse mapping records for realtime volumes
+ */
+#define	XFS_RTRMAP_CRC_MAGIC	0x4d415052	/* 'MAPR' */
+
 /*
  * Reference Count Btree format definitions
  *
diff --git a/libxfs/xfs_types.h b/libxfs/xfs_types.h
index ad2ce83874f..b3edc57dc65 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_MAX
+	XFS_BTNUM_RTRMAPi, XFS_BTNUM_MAX
 } xfs_btnum_t;
 
 #define XFS_BTNUM_STRINGS \
@@ -137,7 +137,8 @@  typedef enum {
 	{ XFS_BTNUM_INOi,	"inobt" }, \
 	{ XFS_BTNUM_FINOi,	"finobt" }, \
 	{ XFS_BTNUM_REFCi,	"refcbt" }, \
-	{ XFS_BTNUM_RCBAGi,	"rcbagbt" }
+	{ XFS_BTNUM_RCBAGi,	"rcbagbt" }, \
+	{ XFS_BTNUM_RTRMAPi,	"rtrmapbt" }
 
 struct xfs_name {
 	const unsigned char	*name;