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Implement VOP_FDATASYNC() for msdosfs.

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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
This commit is contained in:
Konstantin Belousov 2016-08-15 19:17:00 +00:00
parent 1d2537a26a
commit 47e61f6cc6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=304178
3 changed files with 13 additions and 0 deletions
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1
sys/fs/msdosfs/msdosfs_vnops.c
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@ -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,

11
sys/kern/vfs_default.c
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@ -735,6 +735,17 @@ vop_stdfdatasync(struct vop_fdatasync_args *ap)
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)

1
sys/sys/vnode.h
View File

@ -720,6 +720,7 @@ int vfs_write_suspend(struct mount *mp, int flags);
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 *);