From: Darrick J. Wong <djwong@kernel.org>
Date: Thu, 15 Aug 2024 18:49:14 +0000 (-0700)
Subject: xfs: introduce realtime refcount btree definitions
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=ebd0e6bf40636a0984d4b4e49d5e1dce1a23c0b5;p=users%2Fhch%2Fxfs.git

xfs: introduce realtime refcount btree definitions

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 <djwong@kernel.org>
---

diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
index 11c270118d22..f33838df9cfb 100644
--- a/fs/xfs/libxfs/xfs_format.h
+++ b/fs/xfs/libxfs/xfs_format.h
@@ -1784,6 +1784,12 @@ 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