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Layer_fsync(): when syncing a device node call spec_fsync() to clean the 

layer node before descending to the lower file system.

Adresses PR kern/38762 panic: vwakeup: neg numoutput
This commit is contained in:
hannken 2011-07-11 08:34:01 +00:00
parent 49511bba25
commit 68ad0cad04
1 changed files with 9 additions and 2 deletions
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11
sys/miscfs/genfs/layer_vnops.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: layer_vnops.c,v 1.49 2011/07/11 08:27:38 hannken Exp $ */
/* $NetBSD: layer_vnops.c,v 1.50 2011/07/11 08:34:01 hannken Exp $ */
/*
* Copyright (c) 1999 National Aeronautics & Space Administration
@ -170,7 +170,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: layer_vnops.c,v 1.49 2011/07/11 08:27:38 hannken Exp $");
__KERNEL_RCSID(0, "$NetBSD: layer_vnops.c,v 1.50 2011/07/11 08:34:01 hannken Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -186,6 +186,7 @@ __KERNEL_RCSID(0, "$NetBSD: layer_vnops.c,v 1.49 2011/07/11 08:27:38 hannken Exp
#include <miscfs/genfs/layer.h>
#include <miscfs/genfs/layer_extern.h>
#include <miscfs/genfs/genfs.h>
#include <miscfs/specfs/specdev.h>
/*
* This is the 08-June-99 bypass routine, based on the 10-Apr-92 bypass
@ -529,10 +530,16 @@ layer_fsync(void *v)
off_t offhi;
struct lwp *a_l;
} */ *ap = v;
int error;
if (ap->a_flags & FSYNC_RECLAIM) {
return 0;
}
if (ap->a_vp->v_type == VBLK || ap->a_vp->v_type == VCHR) {
error = spec_fsync(v);
if (error)
return error;
}
return LAYERFS_DO_BYPASS(ap->a_vp, ap);
}