[PATCH 5.4 23/53] xfs: factor out a new xfs_log_force_inode helper

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

From: Christoph Hellwig <hch@lst.de>

commit 54fbdd1035e3a4e4f4082c335b095426cdefd092 upstream.

Create a new helper to force the log up to the last LSN touching an
inode.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandan.babu@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/xfs/xfs_export.c |   14 +-------------
 fs/xfs/xfs_file.c   |   12 +-----------
 fs/xfs/xfs_inode.c  |   19 +++++++++++++++++++
 fs/xfs/xfs_inode.h  |    1 +
 4 files changed, 22 insertions(+), 24 deletions(-)

--- a/fs/xfs/xfs_export.c
+++ b/fs/xfs/xfs_export.c
@@ -15,7 +15,6 @@
 #include "xfs_trans.h"
 #include "xfs_inode_item.h"
 #include "xfs_icache.h"
-#include "xfs_log.h"
 #include "xfs_pnfs.h"
 
 /*
@@ -221,18 +220,7 @@ STATIC int
 xfs_fs_nfs_commit_metadata(
 	struct inode		*inode)
 {
-	struct xfs_inode	*ip = XFS_I(inode);
-	struct xfs_mount	*mp = ip->i_mount;
-	xfs_lsn_t		lsn = 0;
-
-	xfs_ilock(ip, XFS_ILOCK_SHARED);
-	if (xfs_ipincount(ip))
-		lsn = ip->i_itemp->ili_last_lsn;
-	xfs_iunlock(ip, XFS_ILOCK_SHARED);
-
-	if (!lsn)
-		return 0;
-	return xfs_log_force_lsn(mp, lsn, XFS_LOG_SYNC, NULL);
+	return xfs_log_force_inode(XFS_I(inode));
 }
 
 const struct export_operations xfs_export_operations = {
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -80,19 +80,9 @@ xfs_dir_fsync(
 	int			datasync)
 {
 	struct xfs_inode	*ip = XFS_I(file->f_mapping->host);
-	struct xfs_mount	*mp = ip->i_mount;
-	xfs_lsn_t		lsn = 0;
 
 	trace_xfs_dir_fsync(ip);
-
-	xfs_ilock(ip, XFS_ILOCK_SHARED);
-	if (xfs_ipincount(ip))
-		lsn = ip->i_itemp->ili_last_lsn;
-	xfs_iunlock(ip, XFS_ILOCK_SHARED);
-
-	if (!lsn)
-		return 0;
-	return xfs_log_force_lsn(mp, lsn, XFS_LOG_SYNC, NULL);
+	return xfs_log_force_inode(ip);
 }
 
 STATIC int
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -3973,3 +3973,22 @@ xfs_irele(
 	trace_xfs_irele(ip, _RET_IP_);
 	iput(VFS_I(ip));
 }
+
+/*
+ * Ensure all commited transactions touching the inode are written to the log.
+ */
+int
+xfs_log_force_inode(
+	struct xfs_inode	*ip)
+{
+	xfs_lsn_t		lsn = 0;
+
+	xfs_ilock(ip, XFS_ILOCK_SHARED);
+	if (xfs_ipincount(ip))
+		lsn = ip->i_itemp->ili_last_lsn;
+	xfs_iunlock(ip, XFS_ILOCK_SHARED);
+
+	if (!lsn)
+		return 0;
+	return xfs_log_force_lsn(ip->i_mount, lsn, XFS_LOG_SYNC, NULL);
+}
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -441,6 +441,7 @@ int		xfs_itruncate_extents_flags(struct
 				struct xfs_inode *, int, xfs_fsize_t, int);
 void		xfs_iext_realloc(xfs_inode_t *, int, int);
 
+int		xfs_log_force_inode(struct xfs_inode *ip);
 void		xfs_iunpin_wait(xfs_inode_t *);
 #define xfs_ipincount(ip)	((unsigned int) atomic_read(&ip->i_pincount))