[src/trunk]: src/sys Set "mnt_lower" before the first file system operation o...

[hannken <hannken%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/4b9b8cff1f0b
branches:  trunk
changeset: 839452:4b9b8cff1f0b
user:      hannken <hannken%NetBSD.org@localhost>
date:      Wed Feb 20 10:05:59 2019 +0000

description:
Set "mnt_lower" before the first file system operation on the new file system.

diffstat:

 sys/fs/union/union_vfsops.c         |  7 +++----
 sys/miscfs/nullfs/null_vfsops.c     |  6 +++---
 sys/miscfs/overlay/overlay_vfsops.c |  6 +++---
 sys/miscfs/umapfs/umap_vfsops.c     |  7 ++++---
 4 files changed, 13 insertions(+), 13 deletions(-)

diffs (137 lines):

diff -r e0b8e3c0ba46 -r 4b9b8cff1f0b sys/fs/union/union_vfsops.c
--- a/sys/fs/union/union_vfsops.c       Wed Feb 20 10:05:20 2019 +0000
+++ b/sys/fs/union/union_vfsops.c       Wed Feb 20 10:05:59 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: union_vfsops.c,v 1.78 2017/04/01 19:35:56 riastradh Exp $      */
+/*     $NetBSD: union_vfsops.c,v 1.79 2019/02/20 10:05:59 hannken Exp $        */
 
 /*
  * Copyright (c) 1994 The Regents of the University of California.
@@ -77,7 +77,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: union_vfsops.c,v 1.78 2017/04/01 19:35:56 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: union_vfsops.c,v 1.79 2019/02/20 10:05:59 hannken Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -246,14 +246,13 @@
 
        mp->mnt_data = um;
        vfs_getnewfsid(mp);
+       mp->mnt_lower = um->um_uppervp->v_mount;
 
        error = set_statvfs_info( path, UIO_USERSPACE, NULL, UIO_USERSPACE,
            mp->mnt_op->vfs_name, mp, l);
        if (error)
                goto bad;
 
-       mp->mnt_lower = um->um_uppervp->v_mount;
-
        switch (um->um_op) {
        case UNMNT_ABOVE:
                cp = "<above>:";
diff -r e0b8e3c0ba46 -r 4b9b8cff1f0b sys/miscfs/nullfs/null_vfsops.c
--- a/sys/miscfs/nullfs/null_vfsops.c   Wed Feb 20 10:05:20 2019 +0000
+++ b/sys/miscfs/nullfs/null_vfsops.c   Wed Feb 20 10:05:59 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: null_vfsops.c,v 1.94 2017/04/11 07:51:37 hannken Exp $ */
+/*     $NetBSD: null_vfsops.c,v 1.95 2019/02/20 10:06:00 hannken Exp $ */
 
 /*
  * Copyright (c) 1999 National Aeronautics & Space Administration
@@ -76,7 +76,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: null_vfsops.c,v 1.94 2017/04/11 07:51:37 hannken Exp $");
+__KERNEL_RCSID(0, "$NetBSD: null_vfsops.c,v 1.95 2019/02/20 10:06:00 hannken Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -146,6 +146,7 @@
         * that the node create call will work.
         */
        vfs_getnewfsid(mp);
+       mp->mnt_lower = lowerrootvp->v_mount;
 
        nmp->nullm_size = sizeof(struct null_node);
        nmp->nullm_tag = VT_NULL;
@@ -175,7 +176,6 @@
        if (error)
                return error;
 
-       mp->mnt_lower = lowerrootvp->v_mount;
        if (mp->mnt_lower->mnt_flag & MNT_LOCAL)
                mp->mnt_flag |= MNT_LOCAL;
        return 0;
diff -r e0b8e3c0ba46 -r 4b9b8cff1f0b sys/miscfs/overlay/overlay_vfsops.c
--- a/sys/miscfs/overlay/overlay_vfsops.c       Wed Feb 20 10:05:20 2019 +0000
+++ b/sys/miscfs/overlay/overlay_vfsops.c       Wed Feb 20 10:05:59 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: overlay_vfsops.c,v 1.67 2017/04/11 07:51:37 hannken Exp $      */
+/*     $NetBSD: overlay_vfsops.c,v 1.68 2019/02/20 10:06:00 hannken Exp $      */
 
 /*
  * Copyright (c) 1999, 2000 National Aeronautics & Space Administration
@@ -74,7 +74,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: overlay_vfsops.c,v 1.67 2017/04/11 07:51:37 hannken Exp $");
+__KERNEL_RCSID(0, "$NetBSD: overlay_vfsops.c,v 1.68 2019/02/20 10:06:00 hannken Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -155,6 +155,7 @@
         * that the node create call will work.
         */
        vfs_getnewfsid(mp);
+       mp->mnt_lower = lowerrootvp->v_mount;
 
        nmp->ovm_size = sizeof (struct overlay_node);
        nmp->ovm_tag = VT_OVERLAY;
@@ -189,7 +190,6 @@
        if (error)
                return error;
 
-       mp->mnt_lower = lowerrootvp->v_mount;
        if (mp->mnt_lower->mnt_flag & MNT_LOCAL)
                mp->mnt_flag |= MNT_LOCAL;
 #ifdef OVERLAYFS_DIAGNOSTIC
diff -r e0b8e3c0ba46 -r 4b9b8cff1f0b sys/miscfs/umapfs/umap_vfsops.c
--- a/sys/miscfs/umapfs/umap_vfsops.c   Wed Feb 20 10:05:20 2019 +0000
+++ b/sys/miscfs/umapfs/umap_vfsops.c   Wed Feb 20 10:05:59 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: umap_vfsops.c,v 1.99 2017/04/11 07:51:37 hannken Exp $ */
+/*     $NetBSD: umap_vfsops.c,v 1.100 2019/02/20 10:06:00 hannken Exp $        */
 
 /*
  * Copyright (c) 1992, 1993
@@ -41,7 +41,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: umap_vfsops.c,v 1.99 2017/04/11 07:51:37 hannken Exp $");
+__KERNEL_RCSID(0, "$NetBSD: umap_vfsops.c,v 1.100 2019/02/20 10:06:00 hannken Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -191,6 +191,8 @@
         * that the node create call will work.
         */
        vfs_getnewfsid(mp);
+       mp->mnt_lower = lowerrootvp->v_mount;
+
        amp->umapm_size = sizeof(struct umap_node);
        amp->umapm_tag = VT_UMAP;
        amp->umapm_bypass = umap_bypass;
@@ -224,7 +226,6 @@
        if (error)
                return error;
 
-       mp->mnt_lower = lowerrootvp->v_mount;
        if (mp->mnt_lower->mnt_flag & MNT_LOCAL)
                mp->mnt_flag |= MNT_LOCAL;
 #ifdef UMAPFS_DIAGNOSTIC