xfs: implement ->sync_lazytime

Switch to the new explicit lazytime syncing method instead of trying
to second guess what could be a lazytime update in ->dirty_inode.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://patch.msgid.link/20260108141934.2052404-11-hch@lst.de
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Christian Brauner <brauner@kernel.org>

Author: Christoph Hellwig

fs/xfs/xfs_iops.c

@@ -1221,6 +1221,22 @@ xfs_vn_update_time(
 	return xfs_trans_commit(tp);
 }
 
+static void
+xfs_vn_sync_lazytime(
+	struct inode		*inode)
+{
+	struct xfs_inode	*ip = XFS_I(inode);
+	struct xfs_mount	*mp = ip->i_mount;
+	struct xfs_trans	*tp;
+
+	if (xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp))
+		return;
+	xfs_ilock(ip, XFS_ILOCK_EXCL);
+	xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
+	xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
+	xfs_trans_commit(tp);
+}
+
 STATIC int
 xfs_vn_fiemap(
 	struct inode		*inode,
@@ -1264,6 +1280,7 @@ static const struct inode_operations xfs_inode_operations = {
 	.listxattr		= xfs_vn_listxattr,
 	.fiemap			= xfs_vn_fiemap,
 	.update_time		= xfs_vn_update_time,
+	.sync_lazytime		= xfs_vn_sync_lazytime,
 	.fileattr_get		= xfs_fileattr_get,
 	.fileattr_set		= xfs_fileattr_set,
 };
@@ -1290,6 +1307,7 @@ static const struct inode_operations xfs_dir_inode_operations = {
 	.setattr		= xfs_vn_setattr,
 	.listxattr		= xfs_vn_listxattr,
 	.update_time		= xfs_vn_update_time,
+	.sync_lazytime		= xfs_vn_sync_lazytime,
 	.tmpfile		= xfs_vn_tmpfile,
 	.fileattr_get		= xfs_fileattr_get,
 	.fileattr_set		= xfs_fileattr_set,
@@ -1317,6 +1335,7 @@ static const struct inode_operations xfs_dir_ci_inode_operations = {
 	.setattr		= xfs_vn_setattr,
 	.listxattr		= xfs_vn_listxattr,
 	.update_time		= xfs_vn_update_time,
+	.sync_lazytime		= xfs_vn_sync_lazytime,
 	.tmpfile		= xfs_vn_tmpfile,
 	.fileattr_get		= xfs_fileattr_get,
 	.fileattr_set		= xfs_fileattr_set,
@@ -1328,6 +1347,7 @@ static const struct inode_operations xfs_symlink_inode_operations = {
 	.setattr		= xfs_vn_setattr,
 	.listxattr		= xfs_vn_listxattr,
 	.update_time		= xfs_vn_update_time,
+	.sync_lazytime		= xfs_vn_sync_lazytime,
 	.fileattr_get		= xfs_fileattr_get,
 	.fileattr_set		= xfs_fileattr_set,
 };

fs/xfs/xfs_super.c

@@ -712,34 +712,6 @@ xfs_fs_destroy_inode(
 	xfs_inode_mark_reclaimable(ip);
 }
 
-static void
-xfs_fs_dirty_inode(
-	struct inode			*inode,
-	int				flags)
-{
-	struct xfs_inode		*ip = XFS_I(inode);
-	struct xfs_mount		*mp = ip->i_mount;
-	struct xfs_trans		*tp;
-
-	if (!(inode->i_sb->s_flags & SB_LAZYTIME))
-		return;
-
-	/*
-	 * Only do the timestamp update if the inode is dirty (I_DIRTY_SYNC)
-	 * and has dirty timestamp (I_DIRTY_TIME). I_DIRTY_TIME can be passed
-	 * in flags possibly together with I_DIRTY_SYNC.
-	 */
-	if ((flags & ~I_DIRTY_TIME) != I_DIRTY_SYNC || !(flags & I_DIRTY_TIME))
-		return;
-
-	if (xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp))
-		return;
-	xfs_ilock(ip, XFS_ILOCK_EXCL);
-	xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
-	xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
-	xfs_trans_commit(tp);
-}
-
 /*
  * Slab object creation initialisation for the XFS inode.
  * This covers only the idempotent fields in the XFS inode;
@@ -1304,7 +1276,6 @@ xfs_fs_show_stats(
 static const struct super_operations xfs_super_operations = {
 	.alloc_inode		= xfs_fs_alloc_inode,
 	.destroy_inode		= xfs_fs_destroy_inode,
-	.dirty_inode		= xfs_fs_dirty_inode,
 	.drop_inode		= xfs_fs_drop_inode,
 	.evict_inode		= xfs_fs_evict_inode,
 	.put_super		= xfs_fs_put_super,