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Illumos #3949, #3950, #3952, #3953

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3949 ztest fault injection should avoid resilvering devices
3950 ztest: deadman fires when we're doing a scan
3951 ztest hang when running dedup test
3952 ztest: ztest_reguid test and ztest_fault_inject don't place nice together
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: Adam Leventhal <ahl@delphix.com>
Approved by: Richard Lowe <richlowe@richlowe.net>

References:
  https://www.illumos.org/issues/3949
  https://www.illumos.org/issues/3950
  https://www.illumos.org/issues/3951
  https://www.illumos.org/issues/3952
  illumos/illumos-gate@2c1e2b4414

Ported-by: Richard Yao <ryao@gentoo.org>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #1775

Porting notes:

1. The deadman thread was removed from ztest during the original
   port because it depended on Solaris thr_create() interface.
   This functionality should be reintroduced using the more
   portable pthreads.
This commit is contained in:
George Wilson 2013-08-07 10:24:34 -08:00 committed by Brian Behlendorf
parent 383fc4a997
commit 621dd7bb2c
3 changed files with 30 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
cmd/ztest/ztest.c
View File

@ -366,7 +366,7 @@ ztest_info_t ztest_info[] = {
{ ztest_fault_inject, 1, &zopt_sometimes },
{ ztest_ddt_repair, 1, &zopt_sometimes },
{ ztest_dmu_snapshot_hold, 1, &zopt_sometimes },
{ ztest_reguid, 1, &zopt_sometimes },
{ ztest_reguid, 1, &zopt_rarely },
{ ztest_spa_rename, 1, &zopt_rarely },
{ ztest_scrub, 1, &zopt_rarely },
{ ztest_spa_upgrade, 1, &zopt_rarely },
@ -4913,6 +4913,14 @@ ztest_fault_inject(ztest_ds_t *zd, uint64_t id)
ASSERT(leaves >= 1);
/*
* Grab the name lock as reader. There are some operations
* which don't like to have their vdevs changed while
* they are in progress (i.e. spa_change_guid). Those
* operations will have grabbed the name lock as writer.
*/
(void) rw_enter(&ztest_name_lock, RW_READER);
/*
* We need SCL_STATE here because we're going to look at vd0->vdev_tsd.
*/
@ -4942,7 +4950,14 @@ ztest_fault_inject(ztest_ds_t *zd, uint64_t id)
if (vd0 != NULL && vd0->vdev_top->vdev_islog)
islog = B_TRUE;
if (vd0 != NULL && maxfaults != 1) {
/*
* If the top-level vdev needs to be resilvered
* then we only allow faults on the device that is
* resilvering.
*/
if (vd0 != NULL && maxfaults != 1 &&
(!vdev_resilver_needed(vd0->vdev_top, NULL, NULL) ||
vd0->vdev_resilvering)) {
/*
* Make vd0 explicitly claim to be unreadable,
* or unwriteable, or reach behind its back
@ -4973,6 +4988,7 @@ ztest_fault_inject(ztest_ds_t *zd, uint64_t id)
if (sav->sav_count == 0) {
spa_config_exit(spa, SCL_STATE, FTAG);
(void) rw_exit(&ztest_name_lock);
goto out;
}
vd0 = sav->sav_vdevs[ztest_random(sav->sav_count)];
@ -4986,6 +5002,7 @@ ztest_fault_inject(ztest_ds_t *zd, uint64_t id)
}
spa_config_exit(spa, SCL_STATE, FTAG);
(void) rw_exit(&ztest_name_lock);
/*
* If we can tolerate two or more faults, or we're dealing

10
module/zfs/spa.c
View File

@ -752,6 +752,7 @@ spa_change_guid(spa_t *spa)
int error;
uint64_t guid;
mutex_enter(&spa->spa_vdev_top_lock);
mutex_enter(&spa_namespace_lock);
guid = spa_generate_guid(NULL);
@ -764,6 +765,7 @@ spa_change_guid(spa_t *spa)
}
mutex_exit(&spa_namespace_lock);
mutex_exit(&spa->spa_vdev_top_lock);
return (error);
}
@ -4737,7 +4739,6 @@ spa_vdev_detach(spa_t *spa, uint64_t guid, uint64_t pguid, int replace_done)
if (pvd->vdev_ops == &vdev_spare_ops)
cvd->vdev_unspare = B_FALSE;
vdev_remove_parent(cvd);
cvd->vdev_resilvering = B_FALSE;
}
@ -5369,6 +5370,13 @@ spa_vdev_resilver_done_hunt(vdev_t *vd)
return (oldvd);
}
if (vd->vdev_resilvering && vdev_dtl_empty(vd, DTL_MISSING) &&
vdev_dtl_empty(vd, DTL_OUTAGE)) {
ASSERT(vd->vdev_ops->vdev_op_leaf);
vd->vdev_resilvering = B_FALSE;
vdev_config_dirty(vd->vdev_top);
}
/*
* Check for a completed replacement. We always consider the first
* vdev in the list to be the oldest vdev, and the last one to be

5
module/zfs/vdev_file.c
View File

@ -162,7 +162,6 @@ vdev_file_io_strategy(void *arg)
static int
vdev_file_io_start(zio_t *zio)
{
spa_t *spa = zio->io_spa;
vdev_t *vd = zio->io_vd;
vdev_file_t *vf = vd->vdev_tsd;
@ -185,8 +184,8 @@ vdev_file_io_start(zio_t *zio)
return (ZIO_PIPELINE_CONTINUE);
}
spa_taskq_dispatch_ent(spa, ZIO_TYPE_FREE, ZIO_TASKQ_ISSUE,
vdev_file_io_strategy, zio, 0, &zio->io_tqent);
VERIFY3U(taskq_dispatch(system_taskq, vdev_file_io_strategy, zio,
TQ_SLEEP), !=, 0);
return (ZIO_PIPELINE_STOP);
}