void
dsl_pool_close(dsl_pool_t *dp)
{
/*
* Drop our references from dsl_pool_open().
*
* Since we held the origin_snap from "syncing" context (which
* includes pool-opening context), it actually only got a "ref"
* and not a hold, so just drop that here.
*/
if (dp->dp_origin_snap != NULL)
dsl_dataset_rele(dp->dp_origin_snap, dp);
if (dp->dp_mos_dir != NULL)
dsl_dir_rele(dp->dp_mos_dir, dp);
if (dp->dp_free_dir != NULL)
dsl_dir_rele(dp->dp_free_dir, dp);
if (dp->dp_leak_dir != NULL)
dsl_dir_rele(dp->dp_leak_dir, dp);
if (dp->dp_root_dir != NULL)
dsl_dir_rele(dp->dp_root_dir, dp);
bpobj_close(&dp->dp_free_bpobj);
bpobj_close(&dp->dp_obsolete_bpobj);
/* undo the dmu_objset_open_impl(mos) from dsl_pool_open() */
if (dp->dp_meta_objset != NULL)
dmu_objset_evict(dp->dp_meta_objset);
txg_list_destroy(&dp->dp_dirty_datasets);
txg_list_destroy(&dp->dp_dirty_zilogs);
txg_list_destroy(&dp->dp_sync_tasks);
txg_list_destroy(&dp->dp_early_sync_tasks);
txg_list_destroy(&dp->dp_dirty_dirs);
taskq_destroy(dp->dp_zil_clean_taskq);
taskq_destroy(dp->dp_sync_taskq);
/*
* We can't set retry to TRUE since we're explicitly specifying
* a spa to flush. This is good enough; any missed buffers for
* this spa won't cause trouble, and they'll eventually fall
* out of the ARC just like any other unused buffer.
*/
arc_flush(dp->dp_spa, FALSE);
mmp_fini(dp->dp_spa);
txg_fini(dp);
dsl_scan_fini(dp);
dmu_buf_user_evict_wait();
rrw_destroy(&dp->dp_config_rwlock);
mutex_destroy(&dp->dp_lock);
cv_destroy(&dp->dp_spaceavail_cv);
taskq_destroy(dp->dp_iput_taskq);
if (dp->dp_blkstats != NULL) {
mutex_destroy(&dp->dp_blkstats->zab_lock);
vmem_free(dp->dp_blkstats, sizeof (zfs_all_blkstats_t));
}
kmem_free(dp, sizeof (dsl_pool_t));
}
/*
* Create a new handler for the given record. We add it to the list, adding
* a reference to the spa_t in the process. We increment zio_injection_enabled,
* which is the switch to trigger all fault injection.
*/
int
zio_inject_fault(char *name, int flags, int *id, zinject_record_t *record)
{
inject_handler_t *handler;
int error;
spa_t *spa;
/*
* If this is pool-wide metadata, make sure we unload the corresponding
* spa_t, so that the next attempt to load it will trigger the fault.
* We call spa_reset() to unload the pool appropriately.
*/
if (flags & ZINJECT_UNLOAD_SPA)
if ((error = spa_reset(name)) != 0)
return (error);
if (!(flags & ZINJECT_NULL)) {
/*
* spa_inject_ref() will add an injection reference, which will
* prevent the pool from being removed from the namespace while
* still allowing it to be unloaded.
*/
if ((spa = spa_inject_addref(name)) == NULL)
return (SET_ERROR(ENOENT));
handler = kmem_alloc(sizeof (inject_handler_t), KM_SLEEP);
rw_enter(&inject_lock, RW_WRITER);
*id = handler->zi_id = inject_next_id++;
handler->zi_spa = spa;
handler->zi_record = *record;
list_insert_tail(&inject_handlers, handler);
atomic_add_32(&zio_injection_enabled, 1);
rw_exit(&inject_lock);
}
/*
* Flush the ARC, so that any attempts to read this data will end up
* going to the ZIO layer. Note that this is a little overkill, but
* we don't have the necessary ARC interfaces to do anything else, and
* fault injection isn't a performance critical path.
*/
if (flags & ZINJECT_FLUSH_ARC)
arc_flush(NULL);
return (0);
}
void
dsl_pool_close(dsl_pool_t *dp)
{
/*
* Drop our references from dsl_pool_open().
*
* Since we held the origin_snap from "syncing" context (which
* includes pool-opening context), it actually only got a "ref"
* and not a hold, so just drop that here.
*/
if (dp->dp_origin_snap)
dsl_dataset_rele(dp->dp_origin_snap, dp);
if (dp->dp_mos_dir)
dsl_dir_rele(dp->dp_mos_dir, dp);
if (dp->dp_free_dir)
dsl_dir_rele(dp->dp_free_dir, dp);
if (dp->dp_leak_dir)
dsl_dir_rele(dp->dp_leak_dir, dp);
if (dp->dp_root_dir)
dsl_dir_rele(dp->dp_root_dir, dp);
bpobj_close(&dp->dp_free_bpobj);
/* undo the dmu_objset_open_impl(mos) from dsl_pool_open() */
if (dp->dp_meta_objset)
dmu_objset_evict(dp->dp_meta_objset);
txg_list_destroy(&dp->dp_dirty_datasets);
txg_list_destroy(&dp->dp_dirty_zilogs);
txg_list_destroy(&dp->dp_sync_tasks);
txg_list_destroy(&dp->dp_dirty_dirs);
arc_flush(dp->dp_spa);
txg_fini(dp);
dsl_scan_fini(dp);
dmu_buf_user_evict_wait();
rrw_destroy(&dp->dp_config_rwlock);
mutex_destroy(&dp->dp_lock);
taskq_destroy(dp->dp_vnrele_taskq);
if (dp->dp_blkstats)
kmem_free(dp->dp_blkstats, sizeof (zfs_all_blkstats_t));
kmem_free(dp, sizeof (dsl_pool_t));
}
