static void
dsl_dataset_user_release_onexit(void *arg)
{
zfs_hold_cleanup_arg_t *ca = arg;
spa_t *spa;
int error;
error = spa_open(ca->zhca_spaname, &spa, FTAG);
if (error != 0) {
zfs_dbgmsg("couldn't release holds on pool=%s "
"because pool is no longer loaded",
ca->zhca_spaname);
return;
}
if (spa_load_guid(spa) != ca->zhca_spa_load_guid) {
zfs_dbgmsg("couldn't release holds on pool=%s "
"because pool is no longer loaded (guid doesn't match)",
ca->zhca_spaname);
spa_close(spa, FTAG);
return;
}
(void) dsl_dataset_user_release_tmp(spa_get_dsl(spa), ca->zhca_holds);
fnvlist_free(ca->zhca_holds);
kmem_free(ca, sizeof (zfs_hold_cleanup_arg_t));
spa_close(spa, FTAG);
}
void
dsl_register_onexit_hold_cleanup(dsl_dataset_t *ds, const char *htag,
minor_t minor)
{
zfs_hold_cleanup_arg_t *ca = kmem_alloc(sizeof (*ca), KM_PUSHPAGE);
spa_t *spa = dsl_dataset_get_spa(ds);
(void) strlcpy(ca->zhca_spaname, spa_name(spa),
sizeof (ca->zhca_spaname));
ca->zhca_spa_load_guid = spa_load_guid(spa);
ca->zhca_dsobj = ds->ds_object;
(void) strlcpy(ca->zhca_htag, htag, sizeof (ca->zhca_htag));
VERIFY0(zfs_onexit_add_cb(minor,
dsl_dataset_user_release_onexit, ca, NULL));
}
static void
dsl_onexit_hold_cleanup(spa_t *spa, nvlist_t *holds, minor_t minor)
{
zfs_hold_cleanup_arg_t *ca;
if (minor == 0 || nvlist_empty(holds)) {
fnvlist_free(holds);
return;
}
ASSERT(spa != NULL);
ca = kmem_alloc(sizeof (*ca), KM_SLEEP);
(void) strlcpy(ca->zhca_spaname, spa_name(spa),
sizeof (ca->zhca_spaname));
ca->zhca_spa_load_guid = spa_load_guid(spa);
ca->zhca_holds = holds;
VERIFY0(zfs_onexit_add_cb(minor,
dsl_dataset_user_release_onexit, ca, NULL));
}