43 #include <netlink-local.h>
44 #include <netlink/netlink.h>
45 #include <netlink/cache.h>
46 #include <netlink/object.h>
47 #include <netlink/utils.h>
60 return cache->c_nitems;
73 if (cache->c_ops == NULL)
76 nl_list_for_each_entry(obj, &cache->c_items, ce_list) {
93 return nl_list_empty(&cache->c_items);
111 if (nl_list_empty(&cache->c_items))
114 return nl_list_entry(cache->c_items.next,
124 if (nl_list_empty(&cache->c_items))
127 return nl_list_entry(cache->c_items.prev,
137 if (nl_list_at_tail(obj, &obj->ce_cache->c_items, ce_list))
140 return nl_list_entry(obj->ce_list.next,
150 if (nl_list_at_head(obj, &obj->ce_cache->c_items, ce_list))
153 return nl_list_entry(obj->ce_list.prev,
175 struct nl_cache *cache;
177 cache = calloc(1,
sizeof(*cache));
181 nl_init_list_head(&cache->c_items);
184 NL_DBG(2,
"Allocated cache %p <%s>.\n", cache, nl_cache_name(cache));
206 struct nl_cache **result)
208 struct nl_cache *cache;
239 struct nl_cache *cache;
270 struct nl_cache *cache;
280 nl_list_for_each_entry(obj, &orig->c_items, ce_list) {
305 NL_DBG(1,
"Clearing cache %p <%s>...\n", cache, nl_cache_name(cache));
307 nl_list_for_each_entry_safe(obj, tmp, &cache->c_items, ce_list)
326 NL_DBG(1,
"Freeing cache %p <%s>...\n", cache, nl_cache_name(cache));
337 static int __cache_add(
struct nl_cache *cache,
struct nl_object *obj)
339 obj->ce_cache = cache;
341 nl_list_add_tail(&obj->ce_list, &cache->c_items);
344 NL_DBG(1,
"Added %p to cache %p <%s>.\n",
345 obj, cache, nl_cache_name(cache));
376 if (cache->c_ops->co_obj_ops != obj->ce_ops)
377 return -NLE_OBJ_MISMATCH;
379 if (!nl_list_empty(&obj->ce_list)) {
388 return __cache_add(cache,
new);
411 if (cache->c_ops->co_obj_ops != obj->ce_ops)
412 return -NLE_OBJ_MISMATCH;
414 NL_DBG(3,
"Moving object %p to cache %p\n", obj, cache);
420 if (!nl_list_empty(&obj->ce_list))
423 return __cache_add(cache, obj);
438 struct nl_cache *cache = obj->ce_cache;
443 nl_list_del(&obj->ce_list);
444 obj->ce_cache = NULL;
448 NL_DBG(1,
"Deleted %p from cache %p <%s>.\n",
449 obj, cache, nl_cache_name(cache));
469 cache->c_iarg1 = arg;
482 cache->c_iarg2 = arg;
509 static int nl_cache_request_full_dump(
struct nl_sock *sk,
510 struct nl_cache *cache)
512 NL_DBG(2,
"Requesting dump from kernel for cache %p <%s>...\n",
513 cache, nl_cache_name(cache));
515 if (cache->c_ops->co_request_update == NULL)
516 return -NLE_OPNOTSUPP;
518 return cache->c_ops->co_request_update(cache, sk);
522 struct update_xdata {
527 static int update_msg_parser(
struct nl_msg *msg,
void *arg)
529 struct update_xdata *x = arg;
531 return nl_cache_parse(x->ops, &msg->nm_src, msg->nm_nlh, x->params);
541 static int __cache_pickup(
struct nl_sock *sk,
struct nl_cache *cache,
546 struct update_xdata x = {
551 NL_DBG(1,
"Picking up answer for cache %p <%s>...\n",
552 cache, nl_cache_name(cache));
562 NL_DBG(2,
"While picking up for %p <%s>, recvmsgs() returned " \
563 "%d: %s", cache, nl_cache_name(cache),
564 err, nl_geterror(err));
593 return __cache_pickup(sk, cache, &p);
596 static int cache_include(
struct nl_cache *cache,
struct nl_object *obj,
597 struct nl_msgtype *type, change_func_t cb,
void *data)
607 if (type->
mt_act == NL_ACT_DEL) {
609 cb(cache, old, NL_ACT_DEL, data);
614 if (type->
mt_act == NL_ACT_NEW) {
616 if (old == NULL && cb)
617 cb(cache, obj, NL_ACT_NEW, data);
620 cb(cache, obj, NL_ACT_CHANGE, data);
627 NL_DBG(2,
"Unknown action associated to object %p\n", obj);
634 int nl_cache_include(
struct nl_cache *cache,
struct nl_object *obj,
635 change_func_t change_cb,
void *data)
641 return -NLE_OBJ_MISMATCH;
643 for (i = 0; ops->co_msgtypes[i].
mt_id >= 0; i++)
644 if (ops->co_msgtypes[i].
mt_id == obj->ce_msgtype)
645 return cache_include(cache, obj, &ops->co_msgtypes[i],
648 return -NLE_MSGTYPE_NOSUPPORT;
653 struct nl_cache_assoc *ca = p->
pp_arg;
655 return nl_cache_include(ca->ca_cache, c, ca->ca_change, ca->ca_change_data);
658 int nl_cache_resync(
struct nl_sock *sk,
struct nl_cache *cache,
659 change_func_t change_cb,
void *data)
662 struct nl_cache_assoc ca = {
664 .ca_change = change_cb,
665 .ca_change_data = data,
673 NL_DBG(1,
"Resyncing cache %p <%s>...\n", cache, nl_cache_name(cache));
679 err = nl_cache_request_full_dump(sk, cache);
683 err = __cache_pickup(sk, cache, &p);
684 if (err == -NLE_DUMP_INTR)
689 nl_list_for_each_entry_safe(obj, next, &cache->c_items, ce_list) {
694 change_cb(cache, obj, NL_ACT_DEL, data);
699 NL_DBG(1,
"Finished resyncing %p <%s>\n", cache, nl_cache_name(cache));
714 int nl_cache_parse(
struct nl_cache_ops *ops,
struct sockaddr_nl *who,
720 return -NLE_MSG_TOOSHORT;
722 for (i = 0; ops->co_msgtypes[i].
mt_id >= 0; i++) {
723 if (ops->co_msgtypes[i].
mt_id == nlh->nlmsg_type) {
725 if (err != -NLE_OPNOTSUPP)
731 err = -NLE_MSGTYPE_NOSUPPORT;
754 return nl_cache_parse(cache->c_ops, NULL,
nlmsg_hdr(msg), &p);
772 err = nl_cache_request_full_dump(sk, cache);
776 NL_DBG(2,
"Upading cache %p <%s>, request sent, waiting for dump...\n",
777 cache, nl_cache_name(cache));
781 if (err == -NLE_DUMP_INTR) {
782 fprintf(stderr,
"dump interrupted, restarting!\n");
816 nl_list_for_each_entry(obj, &cache->c_items, ce_list) {
837 NL_DBG(2,
"Marking all objects in cache %p <%s>...\n",
838 cache, nl_cache_name(cache));
840 nl_list_for_each_entry(obj, &cache->c_items, ce_list)
880 NL_DBG(2,
"Dumping cache %p <%s> filter %p\n",
881 cache, nl_cache_name(cache), filter);
883 if (type > NL_DUMP_MAX || type < 0)
886 if (cache->c_ops == NULL)
889 ops = cache->c_ops->co_obj_ops;
893 nl_list_for_each_entry(obj, &cache->c_items, ce_list) {
897 NL_DBG(4,
"Dumping object %p...\n", obj);
898 dump_from_ops(obj, params);
919 void (*cb)(
struct nl_object *,
void *),
void *arg)
936 void (*cb)(
struct nl_object *,
void *),
void *arg)
940 if (cache->c_ops == NULL)
943 nl_list_for_each_entry_safe(obj, tmp, &cache->c_items, ce_list) {
947 NL_DBG(3,
"%p<->%p object difference: %x\n",