From: Darrick J. Wong <djwong@kernel.org>
Date: Thu, 15 Aug 2024 18:49:26 +0000 (-0700)
Subject: xfs: create routine to allocate and initialize a realtime refcount btree inode
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=fd91b5a716c20c2710d6c85cae9564f301f8894c;p=users%2Fhch%2Fxfsprogs.git

xfs: create routine to allocate and initialize a realtime refcount btree inode

Create a library routine to allocate and initialize an empty realtime
refcountbt inode.  We'll use this for growfs, mkfs, and repair.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
---

diff --git a/libxfs/xfs_rtgroup.c b/libxfs/xfs_rtgroup.c
index a28934fb1..3f1fdd4d3 100644
--- a/libxfs/xfs_rtgroup.c
+++ b/libxfs/xfs_rtgroup.c
@@ -31,6 +31,7 @@
 #include "xfs_metafile.h"
 #include "xfs_metadir.h"
 #include "xfs_rtrmap_btree.h"
+#include "xfs_rtrefcount_btree.h"
 
 /*
  * Passive reference counting access wrappers to the rtgroup structures.  If
@@ -431,6 +432,7 @@ static const struct xfs_rtginode_ops xfs_rtginode_ops[XFS_RTGI_MAX] = {
 		.fmt_mask	= 1U << XFS_DINODE_FMT_REFCOUNT,
 		/* same comment about growfs and rmap inodes applies here */
 		.enabled	= xfs_has_reflink,
+		.create		= xfs_rtrefcountbt_create,
 	},
 };
 
diff --git a/libxfs/xfs_rtrefcount_btree.c b/libxfs/xfs_rtrefcount_btree.c
index ba9dc33b7..ed6ef0356 100644
--- a/libxfs/xfs_rtrefcount_btree.c
+++ b/libxfs/xfs_rtrefcount_btree.c
@@ -697,3 +697,28 @@ xfs_iflush_rtrefcount(
 			ifp->if_broot_bytes, dfp,
 			XFS_DFORK_SIZE(dip, ip->i_mount, XFS_DATA_FORK));
 }
+
+/*
+ * Create a realtime refcount btree inode.
+ */
+int
+xfs_rtrefcountbt_create(
+	struct xfs_rtgroup	*rtg,
+	struct xfs_inode	*ip,
+	struct xfs_trans	*tp,
+	bool			init)
+{
+	struct xfs_ifork	*ifp = xfs_ifork_ptr(ip, XFS_DATA_FORK);
+
+	ifp->if_format = XFS_DINODE_FMT_REFCOUNT;
+	ASSERT(ifp->if_broot_bytes == 0);
+	ASSERT(ifp->if_bytes == 0);
+
+	/* Initialize the empty incore btree root. */
+	xfs_iroot_alloc(ip, XFS_DATA_FORK,
+			xfs_rtrefcount_broot_space_calc(ip->i_mount, 0, 0));
+	xfs_btree_init_block(ip->i_mount, ifp->if_broot, &xfs_rtrefcountbt_ops,
+			0, 0, ip->i_ino);
+	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE | XFS_ILOG_DBROOT);
+	return 0;
+}
diff --git a/libxfs/xfs_rtrefcount_btree.h b/libxfs/xfs_rtrefcount_btree.h
index 3e587ca76..484bd2b09 100644
--- a/libxfs/xfs_rtrefcount_btree.h
+++ b/libxfs/xfs_rtrefcount_btree.h
@@ -184,4 +184,7 @@ void xfs_rtrefcountbt_to_disk(struct xfs_mount *mp,
 		struct xfs_rtrefcount_root *dblock, int dblocklen);
 void xfs_iflush_rtrefcount(struct xfs_inode *ip, struct xfs_dinode *dip);
 
+int xfs_rtrefcountbt_create(struct xfs_rtgroup *rtg, struct xfs_inode *ip,
+		struct xfs_trans *tp, bool init);
+
 #endif	/* __XFS_RTREFCOUNT_BTREE_H__ */