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Illumos #1680: 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.

References to Illumos issue:
  https://www.illumos.org/issues/1680

Ported-by: Richard Yao <ryao@cs.stonybrook.edu>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #655
This commit is contained in:
Andriy Gapon 2012-04-09 13:01:46 -04:00 committed by Brian Behlendorf
parent 109491a897
commit 3adfc400f5
1 changed files with 8 additions and 7 deletions
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15
module/zfs/vdev_file.c
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@ -141,16 +141,17 @@ static int
vdev_file_io_start(zio_t *zio)
{
vdev_t *vd = zio->io_vd;
vdev_file_t *vf = vd->vdev_tsd;
vdev_file_t *vf;
ssize_t resid = 0;
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;
if (zio->io_type == ZIO_TYPE_IOCTL) {
switch (zio->io_cmd) {
case DKIOCFLUSHWRITECACHE:
zio->io_error = VOP_FSYNC(vf->vf_vnode, FSYNC | FDSYNC,