static void dsl_dataset_user_release_sync(void *arg, dmu_tx_t *tx) { dsl_dataset_user_release_arg_t *ddura = arg; dsl_holdfunc_t *holdfunc = ddura->ddura_holdfunc; dsl_pool_t *dp = dmu_tx_pool(tx); ASSERT(RRW_WRITE_HELD(&dp->dp_config_rwlock)); for (nvpair_t *pair = nvlist_next_nvpair(ddura->ddura_chkholds, NULL); pair != NULL; pair = nvlist_next_nvpair(ddura->ddura_chkholds, pair)) { dsl_dataset_t *ds; const char *name = nvpair_name(pair); VERIFY0(holdfunc(dp, name, FTAG, &ds)); dsl_dataset_user_release_sync_one(ds, fnvpair_value_nvlist(pair), tx); if (nvlist_exists(ddura->ddura_todelete, name)) { ASSERT(ds->ds_userrefs == 0 && ds->ds_phys->ds_num_children == 1 && DS_IS_DEFER_DESTROY(ds)); dsl_destroy_snapshot_sync_impl(ds, B_FALSE, tx); } dsl_dataset_rele(ds, FTAG); } }
static void dsl_dataset_user_release_tmp_sync(void *arg, dmu_tx_t *tx) { dsl_dataset_user_release_tmp_arg_t *ddurta = arg; dsl_pool_t *dp = dmu_tx_pool(tx); dsl_dataset_t *ds; VERIFY0(dsl_dataset_hold_obj(dp, ddurta->ddurta_dsobj, FTAG, &ds)); dsl_dataset_user_release_sync_one(ds, ddurta->ddurta_holds, tx); if (ddurta->ddurta_deleteme) { ASSERT(ds->ds_userrefs == 0 && ds->ds_phys->ds_num_children == 1 && DS_IS_DEFER_DESTROY(ds)); dsl_destroy_snapshot_sync_impl(ds, B_FALSE, tx); } dsl_dataset_rele(ds, FTAG); }
static int dsl_dataset_user_release_check_one(dsl_dataset_t *ds, nvlist_t *holds, boolean_t *todelete) { uint64_t zapobj; nvpair_t *pair; objset_t *mos = ds->ds_dir->dd_pool->dp_meta_objset; int error; int numholds = 0; *todelete = B_FALSE; if (!dsl_dataset_is_snapshot(ds)) return (EINVAL); zapobj = ds->ds_phys->ds_userrefs_obj; if (zapobj == 0) return (ESRCH); for (pair = nvlist_next_nvpair(holds, NULL); pair != NULL; pair = nvlist_next_nvpair(holds, pair)) { /* Make sure the hold exists */ uint64_t tmp; error = zap_lookup(mos, zapobj, nvpair_name(pair), 8, 1, &tmp); if (error == ENOENT) error = ESRCH; if (error != 0) return (error); numholds++; } if (DS_IS_DEFER_DESTROY(ds) && ds->ds_phys->ds_num_children == 1 && ds->ds_userrefs == numholds) { /* we need to destroy the snapshot as well */ if (dsl_dataset_long_held(ds)) return (EBUSY); *todelete = B_TRUE; } return (0); }
static void dsl_dataset_user_release_sync(void *arg, dmu_tx_t *tx) { dsl_dataset_user_release_arg_t *ddura = arg; dsl_pool_t *dp = dmu_tx_pool(tx); nvpair_t *pair; for (pair = nvlist_next_nvpair(ddura->ddura_holds, NULL); pair != NULL; pair = nvlist_next_nvpair(ddura->ddura_holds, pair)) { dsl_dataset_t *ds; VERIFY0(dsl_dataset_hold(dp, nvpair_name(pair), FTAG, &ds)); dsl_dataset_user_release_sync_one(ds, fnvpair_value_nvlist(pair), tx); if (nvlist_exists(ddura->ddura_todelete, nvpair_name(pair))) { ASSERT(ds->ds_userrefs == 0 && ds->ds_phys->ds_num_children == 1 && DS_IS_DEFER_DESTROY(ds)); dsl_destroy_snapshot_sync_impl(ds, B_FALSE, tx); } dsl_dataset_rele(ds, FTAG); } }
static int dsl_dataset_user_release_check_one(dsl_dataset_user_release_arg_t *ddura, dsl_dataset_t *ds, nvlist_t *holds, const char *snapname) { uint64_t zapobj; nvlist_t *holds_found; objset_t *mos; int numholds; if (!dsl_dataset_is_snapshot(ds)) return (SET_ERROR(EINVAL)); if (nvlist_empty(holds)) return (0); numholds = 0; mos = ds->ds_dir->dd_pool->dp_meta_objset; zapobj = ds->ds_phys->ds_userrefs_obj; holds_found = fnvlist_alloc(); for (nvpair_t *pair = nvlist_next_nvpair(holds, NULL); pair != NULL; pair = nvlist_next_nvpair(holds, pair)) { uint64_t tmp; int error; const char *holdname = nvpair_name(pair); if (zapobj != 0) error = zap_lookup(mos, zapobj, holdname, 8, 1, &tmp); else error = SET_ERROR(ENOENT); /* * Non-existent holds are put on the errlist, but don't * cause an overall failure. */ if (error == ENOENT) { if (ddura->ddura_errlist != NULL) { char *errtag = kmem_asprintf("%s#%s", snapname, holdname); fnvlist_add_int32(ddura->ddura_errlist, errtag, ENOENT); strfree(errtag); } continue; } if (error != 0) { fnvlist_free(holds_found); return (error); } fnvlist_add_boolean(holds_found, holdname); numholds++; } if (DS_IS_DEFER_DESTROY(ds) && ds->ds_phys->ds_num_children == 1 && ds->ds_userrefs == numholds) { /* we need to destroy the snapshot as well */ if (dsl_dataset_long_held(ds)) { fnvlist_free(holds_found); return (SET_ERROR(EBUSY)); } fnvlist_add_boolean(ddura->ddura_todelete, snapname); } if (numholds != 0) { fnvlist_add_nvlist(ddura->ddura_chkholds, snapname, holds_found); } fnvlist_free(holds_found); return (0); }