enable

Enable fstrans on all file systems.

diff -r 159e0355c051 -r 17e4a2fb28e7 sys/fs/msdosfs/msdosfs_vfsops.c
--- a/sys/fs/msdosfs/msdosfs_vfsops.c	Fri Feb 17 14:58:35 2017 +0100
+++ b/sys/fs/msdosfs/msdosfs_vfsops.c	Fri Feb 17 14:58:35 2017 +0100
@@ -478,10 +478,6 @@
 	bp  = NULL; /* both used in error_exit */
 	pmp = NULL;
 
-	error = fstrans_mount(mp);
-	if (error)
-		goto error_exit;
-
 	error = getdisksize(devvp, &psize, &secsize);
 	if (error) {
 		if (argp->flags & MSDOSFSMNT_GEMDOSFS)
@@ -858,7 +854,6 @@
 	return (0);
 
 error_exit:
-	fstrans_unmount(mp);
 	if (bp)
 		brelse(bp, BC_AGE);
 	if (pmp) {
@@ -923,7 +918,6 @@
 	free(pmp, M_MSDOSFSMNT);
 	mp->mnt_data = NULL;
 	mp->mnt_flag &= ~MNT_LOCAL;
-	fstrans_unmount(mp);
 	return (0);
 }
 
diff -r 159e0355c051 -r 17e4a2fb28e7 sys/kern/vfs_mount.c
--- a/sys/kern/vfs_mount.c	Fri Feb 17 14:58:35 2017 +0100
+++ b/sys/kern/vfs_mount.c	Fri Feb 17 14:58:35 2017 +0100
@@ -82,6 +82,7 @@
 #include <sys/kmem.h>
 #include <sys/module.h>
 #include <sys/mount.h>
+#include <sys/fstrans.h>
 #include <sys/namei.h>
 #include <sys/extattr.h>
 #include <sys/syscallargs.h>
@@ -710,6 +711,12 @@
 		return ENOMEM;
 	}
 
+	if ((error = fstrans_mount(mp)) != 0) {
+		vfs_unbusy(mp, false, NULL);
+		vfs_destroy(mp);
+		return error;
+	}
+
 	mp->mnt_stat.f_owner = kauth_cred_geteuid(l->l_cred);
 
 	/*
@@ -794,6 +801,7 @@
 err_unmounted:
 	vp->v_mountedhere = NULL;
 	mutex_exit(&mp->mnt_updating);
+	fstrans_unmount(mp);
 	vfs_unbusy(mp, false, NULL);
 	vfs_destroy(mp);
 
@@ -919,6 +927,7 @@
 		mutex_exit(&syncer_mutex);
 	vfs_hooks_unmount(mp);
 
+	fstrans_unmount(mp);
 	vfs_destroy(mp);	/* reference from mount() */
 	if (coveredvp != NULLVP) {
 		vrele(coveredvp);
@@ -1200,6 +1209,8 @@
 		mp = TAILQ_FIRST(&mountlist);
 		mp->mnt_flag |= MNT_ROOTFS;
 		mp->mnt_op->vfs_refcount++;
+		error = fstrans_mount(mp);
+		KASSERT(error == 0);
 
 		/*
 		 * Get the vnode for '/'.  Set cwdi0.cwdi_cdir to
diff -r 159e0355c051 -r 17e4a2fb28e7 sys/ufs/ffs/ffs_vfsops.c
--- a/sys/ufs/ffs/ffs_vfsops.c	Fri Feb 17 14:58:35 2017 +0100
+++ b/sys/ufs/ffs/ffs_vfsops.c	Fri Feb 17 14:58:35 2017 +0100
@@ -1115,12 +1115,6 @@
 
 	ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
 
-	error = fstrans_mount(mp);
-	if (error) {
-		DPRINTF("fstrans_mount returned %d", error);
-		return error;
-	}
-
 	ump = kmem_zalloc(sizeof(*ump), KM_SLEEP);
 	mutex_init(&ump->um_lock, MUTEX_DEFAULT, IPL_NONE);
 	error = ffs_snapshot_init(ump);
@@ -1536,7 +1530,6 @@
 	}
 #endif
 
-	fstrans_unmount(mp);
 	if (fs)
 		kmem_free(fs, fs->fs_sbsize);
 	spec_node_setmountedfs(devvp, NULL);
@@ -1739,7 +1732,6 @@
 	kmem_free(ump, sizeof(*ump));
 	mp->mnt_data = NULL;
 	mp->mnt_flag &= ~MNT_LOCAL;
-	fstrans_unmount(mp);
 	return (0);
 }