svn commit: r304178 - in head/sys: fs/msdosfs kern sys

[Konstantin Belousov]

Author: kib
Date: Mon Aug 15 19:17:00 2016
New Revision: 304178
URL: https://svnweb.freebsd.org/changeset/base/304178

Log:
  Implement VOP_FDATASYNC() for msdosfs.
  
  Standard VOP_FSYNC() implementation just syncs data buffers, and due
  to this, is the correct and efficient implementation for msdosfs or
  any other filesystem which uses bufer cache trivially.  Provide
  globally visible wrapper vop_stdfdatasync_buf() for future consumption
  by other filesystems.
  
  Reviewed by:	mckusick
  Tested by:	pho
  Sponsored by:	The FreeBSD Foundation
  MFC after:	2 weeks
  Differential revision:	https://reviews.freebsd.org/D7471

Modified:
  head/sys/fs/msdosfs/msdosfs_vnops.c
  head/sys/kern/vfs_default.c
  head/sys/sys/vnode.h

Modified: head/sys/fs/msdosfs/msdosfs_vnops.c
==============================================================================
--- head/sys/fs/msdosfs/msdosfs_vnops.c	Mon Aug 15 19:15:46 2016	(r304177)
+++ head/sys/fs/msdosfs/msdosfs_vnops.c	Mon Aug 15 19:17:00 2016	(r304178)
@@ -1897,6 +1897,7 @@ struct vop_vector msdosfs_vnodeops = {
 	.vop_close =		msdosfs_close,
 	.vop_create =		msdosfs_create,
 	.vop_fsync =		msdosfs_fsync,
+	.vop_fdatasync =	vop_stdfdatasync_buf,
 	.vop_getattr =		msdosfs_getattr,
 	.vop_inactive =		msdosfs_inactive,
 	.vop_link =		msdosfs_link,

Modified: head/sys/kern/vfs_default.c
==============================================================================
--- head/sys/kern/vfs_default.c	Mon Aug 15 19:15:46 2016	(r304177)
+++ head/sys/kern/vfs_default.c	Mon Aug 15 19:17:00 2016	(r304178)
@@ -735,6 +735,17 @@ vop_stdfdatasync(struct vop_fdatasync_ar
 	return (VOP_FSYNC(ap->a_vp, MNT_WAIT, ap->a_td));
 }
 
+int
+vop_stdfdatasync_buf(struct vop_fdatasync_args *ap)
+{
+	struct vop_fsync_args apf;
+
+	apf.a_vp = ap->a_vp;
+	apf.a_waitfor = MNT_WAIT;
+	apf.a_td = ap->a_td;
+	return (vop_stdfsync(&apf));
+}
+
 /* XXX Needs good comment and more info in the manpage (VOP_GETPAGES(9)). */
 int
 vop_stdgetpages(ap)

Modified: head/sys/sys/vnode.h
==============================================================================
--- head/sys/sys/vnode.h	Mon Aug 15 19:15:46 2016	(r304177)
+++ head/sys/sys/vnode.h	Mon Aug 15 19:17:00 2016	(r304178)
@@ -720,6 +720,7 @@ int	vfs_write_suspend(struct mount *mp, 
 int	vfs_write_suspend_umnt(struct mount *mp);
 void	vnlru_free(int, struct vfsops *);
 int	vop_stdbmap(struct vop_bmap_args *);
+int	vop_stdfdatasync_buf(struct vop_fdatasync_args *);
 int	vop_stdfsync(struct vop_fsync_args *);
 int	vop_stdgetwritemount(struct vop_getwritemount_args *);
 int	vop_stdgetpages(struct vop_getpages_args *);