52 #include <netlink-local.h>
53 #include <netlink/netlink.h>
54 #include <netlink/cache.h>
55 #include <netlink/object.h>
56 #include <netlink/utils.h>
69 return cache->c_nitems;
82 if (cache->c_ops == NULL)
85 nl_list_for_each_entry(obj, &cache->c_items, ce_list) {
102 return nl_list_empty(&cache->c_items);
120 if (nl_list_empty(&cache->c_items))
123 return nl_list_entry(cache->c_items.next,
133 if (nl_list_empty(&cache->c_items))
136 return nl_list_entry(cache->c_items.prev,
146 if (nl_list_at_tail(obj, &obj->ce_cache->c_items, ce_list))
149 return nl_list_entry(obj->ce_list.next,
159 if (nl_list_at_head(obj, &obj->ce_cache->c_items, ce_list))
162 return nl_list_entry(obj->ce_list.prev,
184 struct nl_cache *cache;
186 cache = calloc(1,
sizeof(*cache));
190 nl_init_list_head(&cache->c_items);
193 NL_DBG(2,
"Allocated cache %p <%s>.\n", cache, nl_cache_name(cache));
215 struct nl_cache **result)
217 struct nl_cache *cache;
248 struct nl_cache *cache;
279 struct nl_cache *cache;
289 nl_list_for_each_entry(obj, &orig->c_items, ce_list) {
316 struct nl_cache *clone;
323 nl_list_for_each_entry(obj, &cache->c_items, ce_list)
344 NL_DBG(1,
"Clearing cache %p <%s>...\n", cache, nl_cache_name(cache));
346 nl_list_for_each_entry_safe(obj, tmp, &cache->c_items, ce_list)
365 NL_DBG(1,
"Freeing cache %p <%s>...\n", cache, nl_cache_name(cache));
376 static int __cache_add(
struct nl_cache *cache,
struct nl_object *obj)
378 obj->ce_cache = cache;
380 nl_list_add_tail(&obj->ce_list, &cache->c_items);
383 NL_DBG(1,
"Added %p to cache %p <%s>.\n",
384 obj, cache, nl_cache_name(cache));
415 if (cache->c_ops->co_obj_ops != obj->ce_ops)
416 return -NLE_OBJ_MISMATCH;
418 if (!nl_list_empty(&obj->ce_list)) {
427 return __cache_add(cache,
new);
450 if (cache->c_ops->co_obj_ops != obj->ce_ops)
451 return -NLE_OBJ_MISMATCH;
453 NL_DBG(3,
"Moving object %p to cache %p\n", obj, cache);
459 if (!nl_list_empty(&obj->ce_list))
462 return __cache_add(cache, obj);
477 struct nl_cache *cache = obj->ce_cache;
482 nl_list_del(&obj->ce_list);
483 obj->ce_cache = NULL;
487 NL_DBG(1,
"Deleted %p from cache %p <%s>.\n",
488 obj, cache, nl_cache_name(cache));
508 cache->c_iarg1 = arg;
521 cache->c_iarg2 = arg;
548 static int nl_cache_request_full_dump(
struct nl_sock *sk,
549 struct nl_cache *cache)
551 NL_DBG(2,
"Requesting dump from kernel for cache %p <%s>...\n",
552 cache, nl_cache_name(cache));
554 if (cache->c_ops->co_request_update == NULL)
555 return -NLE_OPNOTSUPP;
557 return cache->c_ops->co_request_update(cache, sk);
561 struct update_xdata {
566 static int update_msg_parser(
struct nl_msg *msg,
void *arg)
568 struct update_xdata *x = arg;
570 return nl_cache_parse(x->ops, &msg->nm_src, msg->nm_nlh, x->params);
580 static int __cache_pickup(
struct nl_sock *sk,
struct nl_cache *cache,
585 struct update_xdata x = {
590 NL_DBG(1,
"Picking up answer for cache %p <%s>...\n",
591 cache, nl_cache_name(cache));
601 NL_DBG(2,
"While picking up for %p <%s>, recvmsgs() returned " \
602 "%d: %s", cache, nl_cache_name(cache),
603 err, nl_geterror(err));
632 return __cache_pickup(sk, cache, &p);
635 static int cache_include(
struct nl_cache *cache,
struct nl_object *obj,
636 struct nl_msgtype *type, change_func_t cb,
void *data)
646 if (type->
mt_act == NL_ACT_DEL) {
648 cb(cache, old, NL_ACT_DEL, data);
653 if (type->
mt_act == NL_ACT_NEW) {
655 if (old == NULL && cb)
656 cb(cache, obj, NL_ACT_NEW, data);
659 cb(cache, obj, NL_ACT_CHANGE, data);
666 NL_DBG(2,
"Unknown action associated to object %p\n", obj);
673 int nl_cache_include(
struct nl_cache *cache,
struct nl_object *obj,
674 change_func_t change_cb,
void *data)
680 return -NLE_OBJ_MISMATCH;
682 for (i = 0; ops->co_msgtypes[i].
mt_id >= 0; i++)
683 if (ops->co_msgtypes[i].
mt_id == obj->ce_msgtype)
684 return cache_include(cache, obj, &ops->co_msgtypes[i],
687 return -NLE_MSGTYPE_NOSUPPORT;
692 struct nl_cache_assoc *ca = p->
pp_arg;
694 return nl_cache_include(ca->ca_cache, c, ca->ca_change, ca->ca_change_data);
697 int nl_cache_resync(
struct nl_sock *sk,
struct nl_cache *cache,
698 change_func_t change_cb,
void *data)
701 struct nl_cache_assoc ca = {
703 .ca_change = change_cb,
704 .ca_change_data = data,
712 NL_DBG(1,
"Resyncing cache %p <%s>...\n", cache, nl_cache_name(cache));
718 err = nl_cache_request_full_dump(sk, cache);
722 err = __cache_pickup(sk, cache, &p);
723 if (err == -NLE_DUMP_INTR)
728 nl_list_for_each_entry_safe(obj, next, &cache->c_items, ce_list) {
733 change_cb(cache, obj, NL_ACT_DEL, data);
738 NL_DBG(1,
"Finished resyncing %p <%s>\n", cache, nl_cache_name(cache));
753 int nl_cache_parse(
struct nl_cache_ops *ops,
struct sockaddr_nl *who,
759 return -NLE_MSG_TOOSHORT;
761 for (i = 0; ops->co_msgtypes[i].
mt_id >= 0; i++) {
762 if (ops->co_msgtypes[i].
mt_id == nlh->nlmsg_type) {
764 if (err != -NLE_OPNOTSUPP)
770 err = -NLE_MSGTYPE_NOSUPPORT;
793 return nl_cache_parse(cache->c_ops, NULL,
nlmsg_hdr(msg), &p);
811 err = nl_cache_request_full_dump(sk, cache);
815 NL_DBG(2,
"Upading cache %p <%s>, request sent, waiting for dump...\n",
816 cache, nl_cache_name(cache));
820 if (err == -NLE_DUMP_INTR) {
821 fprintf(stderr,
"dump interrupted, restarting!\n");
855 nl_list_for_each_entry(obj, &cache->c_items, ce_list) {
876 NL_DBG(2,
"Marking all objects in cache %p <%s>...\n",
877 cache, nl_cache_name(cache));
879 nl_list_for_each_entry(obj, &cache->c_items, ce_list)
919 NL_DBG(2,
"Dumping cache %p <%s> filter %p\n",
920 cache, nl_cache_name(cache), filter);
922 if (type > NL_DUMP_MAX || type < 0)
925 if (cache->c_ops == NULL)
928 ops = cache->c_ops->co_obj_ops;
935 nl_list_for_each_entry(obj, &cache->c_items, ce_list) {
939 NL_DBG(4,
"Dumping object %p...\n", obj);
940 dump_from_ops(obj, params);
961 void (*cb)(
struct nl_object *,
void *),
void *arg)
978 void (*cb)(
struct nl_object *,
void *),
void *arg)
982 if (cache->c_ops == NULL)
985 nl_list_for_each_entry_safe(obj, tmp, &cache->c_items, ce_list) {
989 NL_DBG(3,
"%p<->%p object difference: %x\n",