svn commit: r227704 - stable/9/sys/cddl/contrib/opensolaris/uts/common/fs/zfs

[Pawel Jakub Dawidek]

Author: pjd
Date: Sat Nov 19 10:28:06 2011
New Revision: 227704
URL: http://svn.freebsd.org/changeset/base/227704

Log:
  MFC r226617:
  
  zfs vdev_file_io_start: validate vdev before using vdev_tsd
  
  vdev_tsd can be NULL for certain vdev states.
  At least in userland testing with ztest.
  
  Submitted by:	avg
  Approved by:	re (kib)

Modified:
  stable/9/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_file.c
Directory Properties:
  stable/9/sys/   (props changed)
  stable/9/sys/amd64/include/xen/   (props changed)
  stable/9/sys/boot/   (props changed)
  stable/9/sys/boot/i386/efi/   (props changed)
  stable/9/sys/boot/ia64/efi/   (props changed)
  stable/9/sys/boot/ia64/ski/   (props changed)
  stable/9/sys/boot/powerpc/boot1.chrp/   (props changed)
  stable/9/sys/boot/powerpc/ofw/   (props changed)
  stable/9/sys/cddl/contrib/opensolaris/   (props changed)
  stable/9/sys/conf/   (props changed)
  stable/9/sys/contrib/dev/acpica/   (props changed)
  stable/9/sys/contrib/octeon-sdk/   (props changed)
  stable/9/sys/contrib/pf/   (props changed)
  stable/9/sys/contrib/x86emu/   (props changed)

Modified: stable/9/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_file.c
==============================================================================
--- stable/9/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_file.c	Sat Nov 19 10:26:34 2011	(r227703)
+++ stable/9/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/vdev_file.c	Sat Nov 19 10:28:06 2011	(r227704)
@@ -153,17 +153,19 @@ static int
 vdev_file_io_start(zio_t *zio)
 {
 	vdev_t *vd = zio->io_vd;
-	vdev_file_t *vf = vd->vdev_tsd;
-	vnode_t *vp = vf->vf_vnode;
+	vdev_file_t *vf;
+	vnode_t *vp;
 	ssize_t resid;
 
-	if (zio->io_type == ZIO_TYPE_IOCTL) {
-		/* XXPOLICY */
-		if (!vdev_readable(vd)) {
-			zio->io_error = ENXIO;
-			return (ZIO_PIPELINE_CONTINUE);
-		}
+	if (!vdev_readable(vd)) {
+		zio->io_error = ENXIO;
+		return (ZIO_PIPELINE_CONTINUE);
+	}
+
+	vf = vd->vdev_tsd;
+	vp = vf->vf_vnode;
 
+	if (zio->io_type == ZIO_TYPE_IOCTL) {
 		switch (zio->io_cmd) {
 		case DKIOCFLUSHWRITECACHE:
 			zio->io_error = VOP_FSYNC(vp, FSYNC | FDSYNC,