/* This search function returns a node pointer, and can be used in
* conjunction with avtab_search_next_node()
*/
struct avtab_node* avtab_search_node(struct avtab *h, struct avtab_key *key)
{
int hvalue;
struct avtab_node *cur;
u16 specified = key->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
if ( !h )
return NULL;
hvalue = AVTAB_HASH(key);
for ( cur = h->htable[hvalue]; cur; cur = cur->next )
{
if ( key->source_type == cur->key.source_type &&
key->target_type == cur->key.target_type &&
key->target_class == cur->key.target_class &&
(specified & cur->key.specified) )
return cur;
if ( key->source_type < cur->key.source_type )
break;
if ( key->source_type == cur->key.source_type &&
key->target_type < cur->key.target_type )
break;
if ( key->source_type == cur->key.source_type &&
key->target_type == cur->key.target_type &&
key->target_class < cur->key.target_class )
break;
}
return NULL;
}
int avtab_insert(struct avtab *h, struct avtab_key *key, struct avtab_datum *datum)
{
int hvalue;
struct avtab_node *prev, *cur, *newnode;
if (!h)
return -EINVAL;
hvalue = AVTAB_HASH(key);
for (prev = NULL, cur = h->htable[hvalue];
cur;
prev = cur, cur = cur->next) {
if (key->source_type == cur->key.source_type &&
key->target_type == cur->key.target_type &&
key->target_class == cur->key.target_class &&
(datum->specified & cur->datum.specified))
return -EEXIST;
if (key->source_type < cur->key.source_type)
break;
if (key->source_type == cur->key.source_type &&
key->target_type < cur->key.target_type)
break;
if (key->source_type == cur->key.source_type &&
key->target_type == cur->key.target_type &&
key->target_class < cur->key.target_class)
break;
}
newnode = avtab_insert_node(h, hvalue, prev, cur, key, datum);
if(!newnode)
return -ENOMEM;
return 0;
}
/* Unlike avtab_insert(), this function allow multiple insertions of the same
* key/specified mask into the table, as needed by the conditional avtab.
* It also returns a pointer to the node inserted.
*/
struct avtab_node * avtab_insert_nonunique(struct avtab * h,
struct avtab_key * key, struct avtab_datum * datum)
{
int hvalue;
struct avtab_node *prev, *cur, *newnode;
u16 specified = key->specified & ~(AVTAB_ENABLED|AVTAB_ENABLED_OLD);
if ( !h )
return NULL;
hvalue = AVTAB_HASH(key);
for ( prev = NULL, cur = h->htable[hvalue]; cur;
prev = cur, cur = cur->next )
{
if ( key->source_type == cur->key.source_type &&
key->target_type == cur->key.target_type &&
key->target_class == cur->key.target_class &&
(specified & cur->key.specified) )
break;
if ( key->source_type < cur->key.source_type )
break;
if ( key->source_type == cur->key.source_type &&
key->target_type < cur->key.target_type )
break;
if ( key->source_type == cur->key.source_type &&
key->target_type == cur->key.target_type &&
key->target_class < cur->key.target_class )
break;
}
newnode = avtab_insert_node(h, hvalue, prev, cur, key, datum);
return newnode;
}
struct avtab_datum *avtab_search(struct avtab *h, struct avtab_key *key, int specified)
{
int hvalue;
struct avtab_node *cur;
if (!h)
return NULL;
hvalue = AVTAB_HASH(key);
for (cur = h->htable[hvalue]; cur; cur = cur->next) {
if (key->source_type == cur->key.source_type &&
key->target_type == cur->key.target_type &&
key->target_class == cur->key.target_class &&
(specified & cur->datum.specified))
return &cur->datum;
if (key->source_type < cur->key.source_type)
break;
if (key->source_type == cur->key.source_type &&
key->target_type < cur->key.target_type)
break;
if (key->source_type == cur->key.source_type &&
key->target_type == cur->key.target_type &&
key->target_class < cur->key.target_class)
break;
}
return NULL;
}