[src/trunk]: src/sys/miscfs/genfs assert that WAPBL journal write lock is act...

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

details:   https://anonhg.NetBSD.org/src/rev/9709a9c5b5fb
branches:  trunk
changeset: 837560:9709a9c5b5fb
user:      jdolecek <jdolecek%NetBSD.org@localhost>
date:      Mon Dec 10 21:10:52 2018 +0000

description:
assert that WAPBL journal write lock is actually held when called with
PGO_JOURNALLOCKED or IO_JOURNALLOCKED

suggested by mrg@, thanks

diffstat:

 sys/miscfs/genfs/genfs_io.c |  19 +++++++++++++++++--
 1 files changed, 17 insertions(+), 2 deletions(-)

diffs (54 lines):

diff -r 4919f63fccc0 -r 9709a9c5b5fb sys/miscfs/genfs/genfs_io.c
--- a/sys/miscfs/genfs/genfs_io.c       Mon Dec 10 21:03:48 2018 +0000
+++ b/sys/miscfs/genfs/genfs_io.c       Mon Dec 10 21:10:52 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: genfs_io.c,v 1.73 2018/12/09 20:32:37 jdolecek Exp $   */
+/*     $NetBSD: genfs_io.c,v 1.74 2018/12/10 21:10:52 jdolecek Exp $   */
 
 /*
  * Copyright (c) 1982, 1986, 1989, 1993
@@ -31,7 +31,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: genfs_io.c,v 1.73 2018/12/09 20:32:37 jdolecek Exp $");
+__KERNEL_RCSID(0, "$NetBSD: genfs_io.c,v 1.74 2018/12/10 21:10:52 jdolecek Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -141,6 +141,11 @@
        KASSERT(vp->v_type == VREG || vp->v_type == VDIR ||
            vp->v_type == VLNK || vp->v_type == VBLK);
 
+#ifdef DIAGNOSTIC
+       if ((flags & PGO_JOURNALLOCKED) && vp->v_mount->mnt_wapbl)
+                WAPBL_JLOCK_ASSERT(vp->v_mount);
+#endif
+
        error = vdead_check(vp, VDEAD_NOWAIT);
        if (error) {
                if ((flags & PGO_LOCKED) == 0)
@@ -869,6 +874,11 @@
        UVMHIST_LOG(ubchist, "vp %#jx pages %jd off 0x%jx len 0x%jx",
            (uintptr_t)vp, uobj->uo_npages, startoff, endoff - startoff);
 
+#ifdef DIAGNOSTIC
+       if ((origflags & PGO_JOURNALLOCKED) && vp->v_mount->mnt_wapbl)
+                WAPBL_JLOCK_ASSERT(vp->v_mount);
+#endif
+
        trans_mp = NULL;
        holds_wapbl = false;
 
@@ -1714,6 +1724,11 @@
        bool need_wapbl = (vp->v_mount && vp->v_mount->mnt_wapbl &&
            (ioflag & IO_JOURNALLOCKED) == 0);
 
+#ifdef DIAGNOSTIC
+       if ((ioflag & IO_JOURNALLOCKED) && vp->v_mount->mnt_wapbl)
+                WAPBL_JLOCK_ASSERT(vp->v_mount);
+#endif
+
        /*
         * We only support direct I/O to user space for now.
         */