io/dls/dls_link.c

221 	dls_head_t *dhp = (dls_head_t *)val;
227 	mutex_enter(&dhp->dh_lock);
228 	if (dhp->dh_removing) {
229 		mutex_exit(&dhp->dh_lock);
232 	dhp->dh_ref++;
233 	mutex_exit(&dhp->dh_lock);
238 i_dls_head_rele(dls_head_t *dhp)
240 	mutex_enter(&dhp->dh_lock);
241 	dhp->dh_ref--;
242 	if (dhp->dh_ref == 0 && dhp->dh_removing != 0)
243 		cv_broadcast(&dhp->dh_cv);
244 	mutex_exit(&dhp->dh_lock);
250 	dls_head_t	*dhp;
252 	dhp = kmem_zalloc(sizeof (dls_head_t), KM_SLEEP);
253 	dhp->dh_key = key;
254 	return (dhp);
258 i_dls_head_free(dls_head_t *dhp)
260 	ASSERT(dhp->dh_ref == 0);
261 	kmem_free(dhp, sizeof (dls_head_t));
277 	dls_head_t	*dhp;
298 	if (mod_hash_find_cb_rval(hash, key, (mod_hash_val_t *)&dhp,
306 	for (dsp = dhp->dh_list; dsp != NULL; dsp = dsp->ds_next) {
328 	i_dls_head_rele(dhp);
341 	dls_head_t			*dhp;
419 		if (mod_hash_find_cb_rval(hash, key, (mod_hash_val_t *)&dhp,
428 		for (dsp = dhp->dh_list; dsp != NULL; dsp = dsp->ds_next)
437 			i_dls_head_rele(dhp);
487 		i_dls_head_rele(dhp);
553 	dls_head_t			*dhp;
567 		    (mod_hash_val_t *)&dhp) != 0)
916 	dls_head_t	*dhp;
930 	if ((err = mod_hash_find(hash, key, (mod_hash_val_t *)&dhp)) != 0) {
933 		dhp = i_dls_head_alloc(key);
934 		err = mod_hash_insert(hash, key, (mod_hash_val_t)dhp);
945 	p = dhp->dh_list;
950 	dhp->dh_list = dsp;
955 	dsp->ds_head = dhp;
965 	dls_head_t	*dhp;
980 	dhp = dsp->ds_head;
982 	mutex_enter(&dhp->dh_lock);
983 	dhp->dh_removing = B_TRUE;
984 	while (dhp->dh_ref != 0)
985 		cv_wait(&dhp->dh_cv, &dhp->dh_lock);
986 	mutex_exit(&dhp->dh_lock);
991 	for (pp = &dhp->dh_list; (p = *pp) != NULL; pp = &(p->ds_next)) {
1003 	if (dhp->dh_list == NULL) {
1009 		(void) mod_hash_remove(hash, dhp->dh_key, &val);
1010 		ASSERT(dhp == (dls_head_t *)val);
1011 		i_dls_head_free(dhp);
1013 		mutex_enter(&dhp->dh_lock);
1014 		dhp->dh_removing = B_FALSE;
1015 		mutex_exit(&dhp->dh_lock);