[PATCH 17/64] libxfs: split new inode creation into two pieces

["Darrick J. Wong" <djwong@xxxxxxxxxx>]

From: Darrick J. Wong <djwong@xxxxxxxxxx>

Source kernel commit: 38fd3d6a956f1b104f11cd6eee116c54bfe458c4

There are two parts to initializing a newly allocated inode: setting up
the incore structures, and initializing the new inode core based on the
parent inode and the current user's environment.  The initialization
code is not specific to the kernel, so we would like to share that with
userspace by hoisting it to libxfs.  Therefore, split xfs_icreate into
separate functions to prepare for the next few patches.

Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx>
---
 libxfs/inode.c |   51 ++++++++++++++++++++++++++++++---------------------
 1 file changed, 30 insertions(+), 21 deletions(-)


diff --git a/libxfs/inode.c b/libxfs/inode.c
index 3e72b25cc..206b779a8 100644
--- a/libxfs/inode.c
+++ b/libxfs/inode.c
@@ -91,33 +91,21 @@ libxfs_bumplink(
 	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
 }
 
-/*
- * Initialise a newly allocated inode and return the in-core inode to the
- * caller locked exclusively.
- */
-static int
-libxfs_icreate(
+/* Initialise an inode's attributes. */
+static void
+xfs_inode_init(
 	struct xfs_trans	*tp,
-	xfs_ino_t		ino,
 	const struct xfs_icreate_args *args,
-	struct xfs_inode	**ipp)
+	struct xfs_inode	*ip)
 {
 	struct xfs_mount	*mp = tp->t_mountp;
 	struct xfs_inode	*pip = args->pip;
 	struct inode		*dir = pip ? VFS_I(pip) : NULL;
-	struct inode		*inode;
-	struct xfs_inode	*ip;
+	struct inode		*inode = VFS_I(ip);
 	unsigned int		flags;
 	int			times = XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG |
 					XFS_ICHGTIME_ACCESS;
-	int			error;
 
-	error = libxfs_iget(mp, tp, ino, XFS_IGET_CREATE, &ip);
-	if (error != 0)
-		return error;
-	ASSERT(ip != NULL);
-
-	inode = VFS_I(ip);
 	inode->i_mode = args->mode;
 	if (args->flags & XFS_ICREATE_TMPFILE)
 		set_nlink(inode, 0);
@@ -201,11 +189,32 @@ libxfs_icreate(
 		}
 	}
 
-	/*
-	 * Log the new values stuffed into the inode.
-	 */
-	xfs_trans_ijoin(tp, ip, 0);
 	xfs_trans_log_inode(tp, ip, flags);
+}
+
+/*
+ * Initialise a newly allocated inode and return the in-core inode to the
+ * caller locked exclusively.
+ */
+static int
+libxfs_icreate(
+	struct xfs_trans	*tp,
+	xfs_ino_t		ino,
+	const struct xfs_icreate_args *args,
+	struct xfs_inode	**ipp)
+{
+	struct xfs_mount	*mp = tp->t_mountp;
+	struct xfs_inode	*ip = NULL;
+	int			error;
+
+	error = libxfs_iget(mp, tp, ino, XFS_IGET_CREATE, &ip);
+	if (error)
+		return error;
+
+	ASSERT(ip != NULL);
+	xfs_trans_ijoin(tp, ip, 0);
+	xfs_inode_init(tp, args, ip);
+
 	*ipp = ip;
 	return 0;
 }