void dsl_dataset_user_hold_sync_one(dsl_dataset_t *ds, const char *htag, minor_t minor, uint64_t now, dmu_tx_t *tx) { dsl_pool_t *dp = ds->ds_dir->dd_pool; objset_t *mos = dp->dp_meta_objset; uint64_t zapobj; mutex_enter(&ds->ds_lock); if (ds->ds_phys->ds_userrefs_obj == 0) { /* * This is the first user hold for this dataset. Create * the userrefs zap object. */ dmu_buf_will_dirty(ds->ds_dbuf, tx); zapobj = ds->ds_phys->ds_userrefs_obj = zap_create(mos, DMU_OT_USERREFS, DMU_OT_NONE, 0, tx); } else { zapobj = ds->ds_phys->ds_userrefs_obj; } ds->ds_userrefs++; mutex_exit(&ds->ds_lock); VERIFY0(zap_add(mos, zapobj, htag, 8, 1, &now, tx)); if (minor != 0) { VERIFY0(dsl_pool_user_hold(dp, ds->ds_object, htag, now, tx)); dsl_register_onexit_hold_cleanup(ds, htag, minor); } spa_history_log_internal_ds(ds, "hold", tx, "tag=%s temp=%d refs=%llu", htag, minor != 0, ds->ds_userrefs); }
static void dsl_dataset_user_hold_sync_one_impl(nvlist_t *tmpholds, dsl_dataset_t *ds, const char *htag, minor_t minor, uint64_t now, dmu_tx_t *tx) { dsl_pool_t *dp = ds->ds_dir->dd_pool; objset_t *mos = dp->dp_meta_objset; uint64_t zapobj; ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock)); if (ds->ds_phys->ds_userrefs_obj == 0) { /* * This is the first user hold for this dataset. Create * the userrefs zap object. */ dmu_buf_will_dirty(ds->ds_dbuf, tx); zapobj = ds->ds_phys->ds_userrefs_obj = zap_create(mos, DMU_OT_USERREFS, DMU_OT_NONE, 0, tx); } else { zapobj = ds->ds_phys->ds_userrefs_obj; } ds->ds_userrefs++; VERIFY0(zap_add(mos, zapobj, htag, 8, 1, &now, tx)); if (minor != 0) { char name[MAXNAMELEN]; nvlist_t *tags; VERIFY0(dsl_pool_user_hold(dp, ds->ds_object, htag, now, tx)); (void) snprintf(name, sizeof (name), "%llx", (u_longlong_t)ds->ds_object); if (nvlist_lookup_nvlist(tmpholds, name, &tags) != 0) { VERIFY0(nvlist_alloc(&tags, NV_UNIQUE_NAME, KM_PUSHPAGE)); fnvlist_add_boolean(tags, htag); fnvlist_add_nvlist(tmpholds, name, tags); fnvlist_free(tags); } else { fnvlist_add_boolean(tags, htag); } } spa_history_log_internal_ds(ds, "hold", tx, "tag=%s temp=%d refs=%llu", htag, minor != 0, ds->ds_userrefs); }