xfs: hoist inode free function to libxfs

Create a libxfs helper function that marks an inode free on disk.

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

1 files changed, 48 insertions, 0 deletions

diff --git a/fs/xfs/libxfs/xfs_inode_util.c b/fs/xfs/libxfs/xfs_inode_util.c
index b6c6d321f6fc..fb68eeb58d0a 100644
--- a/fs/xfs/libxfs/xfs_inode_util.c
+++ b/fs/xfs/libxfs/xfs_inode_util.c
@@ -21,6 +21,7 @@
 #include "xfs_error.h"
 #include "xfs_trace.h"
 #include "xfs_ag.h"
+#include "xfs_inode_item.h"
 
 uint16_t
 xfs_flags2diflags(
@@ -791,3 +792,50 @@ xfs_bumplink(
 	inc_nlink(VFS_I(ip));
 	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
 }
+
+/* Mark an inode free on disk. */
+int
+xfs_dir_ifree(
+	struct xfs_trans	*tp,
+	struct xfs_perag	*pag,
+	struct xfs_inode	*ip,
+	struct xfs_icluster	*xic)
+{
+	int			error;
+
+	/*
+	 * Pull the on-disk inode from the AGI unlinked list.
+	 */
+	error = xfs_iunlink_remove(tp, pag, ip);
+	if (error)
+		return error;
+
+	error = xfs_difree(tp, pag, ip->i_ino, xic);
+	if (error)
+		return error;
+
+	/*
+	 * Free any local-format data sitting around before we reset the
+	 * data fork to extents format.  Note that the attr fork data has
+	 * already been freed by xfs_attr_inactive.
+	 */
+	if (ip->i_df.if_format == XFS_DINODE_FMT_LOCAL) {
+		kmem_free(ip->i_df.if_u1.if_data);
+		ip->i_df.if_u1.if_data = NULL;
+		ip->i_df.if_bytes = 0;
+	}
+
+	VFS_I(ip)->i_mode = 0;		/* mark incore inode as free */
+	ip->i_diflags = 0;
+	ip->i_diflags2 = ip->i_mount->m_ino_geo.new_diflags2;
+	ip->i_forkoff = 0;		/* mark the attr fork not in use */
+	ip->i_df.if_format = XFS_DINODE_FMT_EXTENTS;
+
+	/*
+	 * Bump the generation count so no one will be confused
+	 * by reincarnations of this inode.
+	 */
+	VFS_I(ip)->i_generation++;
+	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
+	return 0;
+}