/*
* Register interest in the named property. We'll call the callback
* once to notify it of the current property value, and again each time
* the property changes, until this callback is unregistered.
*
* Return 0 on success, errno if the prop is not an integer value.
*/
int
dsl_prop_register(dsl_dataset_t *ds, const char *propname,
dsl_prop_changed_cb_t *callback, void *cbarg)
{
dsl_dir_t *dd = ds->ds_dir;
uint64_t value;
dsl_prop_record_t *pr;
dsl_prop_cb_record_t *cbr;
int err;
ASSERTV(dsl_pool_t *dp = dd->dd_pool);
ASSERT(dsl_pool_config_held(dp));
err = dsl_prop_get_int_ds(ds, propname, &value);
if (err != 0)
return (err);
cbr = kmem_alloc(sizeof (dsl_prop_cb_record_t), KM_SLEEP);
cbr->cbr_ds = ds;
cbr->cbr_func = callback;
cbr->cbr_arg = cbarg;
mutex_enter(&dd->dd_lock);
pr = dsl_prop_record_find(dd, propname);
if (pr == NULL)
pr = dsl_prop_record_create(dd, propname);
cbr->cbr_pr = pr;
list_insert_head(&pr->pr_cbs, cbr);
list_insert_head(&ds->ds_prop_cbs, cbr);
mutex_exit(&dd->dd_lock);
cbr->cbr_func(cbr->cbr_arg, value);
return (0);
}
/*
* Register interest in the named property. We'll call the callback
* once to notify it of the current property value, and again each time
* the property changes, until this callback is unregistered.
*
* Return 0 on success, errno if the prop is not an integer value.
*/
int
dsl_prop_register(dsl_dataset_t *ds, const char *propname,
dsl_prop_changed_cb_t *callback, void *cbarg)
{
dsl_dir_t *dd = ds->ds_dir;
uint64_t value;
dsl_prop_cb_record_t *cbr;
int err;
ASSERTV(dsl_pool_t *dp = dd->dd_pool);
ASSERT(dsl_pool_config_held(dp));
err = dsl_prop_get_int_ds(ds, propname, &value);
if (err != 0)
return (err);
cbr = kmem_alloc(sizeof (dsl_prop_cb_record_t), KM_PUSHPAGE);
cbr->cbr_ds = ds;
cbr->cbr_propname = kmem_alloc(strlen(propname)+1, KM_PUSHPAGE);
(void) strcpy((char *)cbr->cbr_propname, propname);
cbr->cbr_func = callback;
cbr->cbr_arg = cbarg;
mutex_enter(&dd->dd_lock);
list_insert_head(&dd->dd_prop_cbs, cbr);
mutex_exit(&dd->dd_lock);
cbr->cbr_func(cbr->cbr_arg, value);
return (0);
}