From: Darrick J. Wong <djwong@xxxxxxxxxx>
Create a library routine to allocate and initialize an empty realtime
rmapbt inode. We'll use this for growfs, mkfs, and repair.
Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
libxfs/xfs_rtrmap_btree.c | 41 +++++++++++++++++++++++++++++++++++++++++
libxfs/xfs_rtrmap_btree.h | 5 +++++
2 files changed, 46 insertions(+)
diff --git a/libxfs/xfs_rtrmap_btree.c b/libxfs/xfs_rtrmap_btree.c
index f92815b08a2..38f0b8567a6 100644
--- a/libxfs/xfs_rtrmap_btree.c
+++ b/libxfs/xfs_rtrmap_btree.c
@@ -865,3 +865,44 @@ xfs_iflush_rtrmap(
xfs_rtrmapbt_to_disk(ip->i_mount, ifp->if_broot, ifp->if_broot_bytes,
dfp, XFS_DFORK_SIZE(dip, ip->i_mount, XFS_DATA_FORK));
}
+
+/*
+ * Create a realtime rmap btree inode.
+ *
+ * Regardless of the return value, the caller must clean up @ic. If a new
+ * inode is returned through *ipp, the caller must finish setting up the incore
+ * inode and release it.
+ */
+int
+xfs_rtrmapbt_create(
+ struct xfs_trans **tpp,
+ struct xfs_imeta_path *path,
+ struct xfs_imeta_update *upd,
+ struct xfs_inode **ipp)
+{
+ struct xfs_mount *mp = (*tpp)->t_mountp;
+ struct xfs_ifork *ifp;
+ struct xfs_inode *ip;
+ int error;
+
+ *ipp = NULL;
+
+ error = xfs_imeta_create(tpp, path, S_IFREG, 0, &ip, upd);
+ if (error)
+ return error;
+
+ ifp = &ip->i_df;
+ ifp->if_format = XFS_DINODE_FMT_RMAP;
+ 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_rtrmap_broot_space_calc(mp, 0, 0));
+ xfs_btree_init_block(mp, ifp->if_broot, &xfs_rtrmapbt_ops, 0, 0,
+ ip->i_ino);
+ xfs_trans_log_inode(*tpp, ip, XFS_ILOG_CORE | XFS_ILOG_DBROOT);
+
+ *ipp = ip;
+ return 0;
+}
diff --git a/libxfs/xfs_rtrmap_btree.h b/libxfs/xfs_rtrmap_btree.h
index 6917a31bfe0..046a6081673 100644
--- a/libxfs/xfs_rtrmap_btree.h
+++ b/libxfs/xfs_rtrmap_btree.h
@@ -198,4 +198,9 @@ void xfs_rtrmapbt_to_disk(struct xfs_mount *mp, struct xfs_btree_block *rblock,
unsigned int dblocklen);
void xfs_iflush_rtrmap(struct xfs_inode *ip, struct xfs_dinode *dip);
+struct xfs_imeta_update;
+
+int xfs_rtrmapbt_create(struct xfs_trans **tpp, struct xfs_imeta_path *path,
+ struct xfs_imeta_update *ic, struct xfs_inode **ipp);
+
#endif /* __XFS_RTRMAP_BTREE_H__ */
