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Merge branch 'devel/scheduling_bug_detection' into features/canonical_dnssec_chain

This commit is contained in:
Willem Toorop 2016-04-22 14:42:25 +02:00
parent 4849329818 d61e64c9c7
commit af8e27f059
7 changed files with 105 additions and 27 deletions
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36
src/dnssec.c
View File

@ -719,6 +719,8 @@ typedef struct chain_node chain_node;
struct chain_head {
struct mem_funcs my_mf;
size_t lock;
chain_head *next;
chain_node *parent;
size_t node_count; /* Number of nodes attached directly
@ -840,6 +842,7 @@ static chain_head *add_rrset2val_chain(struct mem_funcs *mf,
head = *chain_p = (chain_head *)region;
head->my_mf = *mf;
head->lock = 1;
head->next = NULL;
head->rrset.name = head->name_spc;
memcpy(head->name_spc, rrset->name, dname_len);
@ -1302,6 +1305,7 @@ static void val_chain_node_cb(getdns_dns_req *dnsreq)
default : check_chain_complete(node->chains);
return;
}
node->lock++;
n_signers = 0;
for ( i = rrset_iter_init(&i_spc,netreq->response,netreq->response_len)
; i
@ -1327,6 +1331,7 @@ static void val_chain_node_cb(getdns_dns_req *dnsreq)
*/
val_chain_sched_soa_node(node->parent);
node->lock--;
check_chain_complete(node->chains);
}
@ -1346,17 +1351,21 @@ static void val_chain_node_soa_cb(getdns_dns_req *dnsreq)
! _dname_equal(node->ds.name, rrset->name))
node = node->parent;
if (node)
if (node) {
node->lock++;
val_chain_sched_ds_node(node);
else {
} else {
/* SOA for a different name */
node = (chain_node *)dnsreq->user_pointer;
node->lock++;
val_chain_sched_soa_node(node->parent);
}
} else if (node->parent)
} else if (node->parent) {
node->lock++;
val_chain_sched_soa_node(node->parent);
}
node->lock--;
check_chain_complete(node->chains);
}
@ -2972,7 +2981,7 @@ static size_t count_outstanding_requests(chain_head *head)
if (!head)
return 0;
for ( node = head->parent, count = 0
for ( node = head->parent, count = head->lock
; node
; node = node->parent) {
@ -3221,7 +3230,7 @@ static void check_chain_complete(chain_head *chain)
&& !dnsreq->avoid_dnssec_roadblocks
&& dnsreq->netreqs[0]->dnssec_status == GETDNS_DNSSEC_BOGUS) {
getdns_return_t r = GETDNS_RETURN_GOOD;
int r = GETDNS_RETURN_GOOD;
getdns_network_req **netreq_p, *netreq;
dnsreq->avoid_dnssec_roadblocks = 1;
@ -3302,6 +3311,7 @@ static void check_chain_complete(chain_head *chain)
}
/* Final user callback */
dnsreq->validating = 0;
_getdns_call_user_callback(dnsreq, response_dict);
}
@ -3309,7 +3319,11 @@ static void check_chain_complete(chain_head *chain)
void _getdns_get_validation_chain(getdns_dns_req *dnsreq)
{
getdns_network_req *netreq, **netreq_p;
chain_head *chain = NULL;
chain_head *chain = NULL, *chain_p;
if (dnsreq->validating)
return;
dnsreq->validating = 1;
for (netreq_p = dnsreq->netreqs; (netreq = *netreq_p) ; netreq_p++) {
if (! netreq->response
@ -3334,11 +3348,15 @@ void _getdns_get_validation_chain(getdns_dns_req *dnsreq)
, netreq
);
}
if (chain)
if (chain) {
for (chain_p = chain; chain_p; chain_p = chain_p->next)
chain_p->lock--;
check_chain_complete(chain);
else
} else {
dnsreq->validating = 0;
_getdns_call_user_callback(dnsreq,
_getdns_create_getdns_response(dnsreq));
}
}

64
src/general.c
View File

@ -161,7 +161,7 @@ void
_getdns_check_dns_req_complete(getdns_dns_req *dns_req)
{
getdns_network_req **netreq_p, *netreq;
int results_found = 0;
int results_found = 0, r;
for (netreq_p = dns_req->netreqs; (netreq = *netreq_p); netreq_p++)
if (netreq->state != NET_REQ_FINISHED &&
@ -198,8 +198,11 @@ _getdns_check_dns_req_complete(getdns_dns_req *dns_req)
; (netreq = *netreq_p)
; netreq_p++ ) {
_getdns_netreq_reinit(netreq);
if (_getdns_submit_netreq(netreq))
if ((r = _getdns_submit_netreq(netreq))) {
if (r == DNS_REQ_FINISHED)
return;
netreq->state = NET_REQ_FINISHED;
}
}
_getdns_check_dns_req_complete(dns_req);
return;
@ -233,8 +236,11 @@ _getdns_check_dns_req_complete(getdns_dns_req *dns_req)
; (netreq = *netreq_p)
; netreq_p++ ) {
_getdns_netreq_reinit(netreq);
if (_getdns_submit_netreq(netreq))
if ((r = _getdns_submit_netreq(netreq))) {
if (r == DNS_REQ_FINISHED)
return;
netreq->state = NET_REQ_FINISHED;
}
}
_getdns_check_dns_req_complete(dns_req);
return;
@ -312,13 +318,16 @@ ub_resolve_callback(void* arg, int err, struct ub_result* ub_res)
#endif
getdns_return_t
int
_getdns_submit_netreq(getdns_network_req *netreq)
{
getdns_return_t r;
getdns_dns_req *dns_req = netreq->owner;
char name[1024];
int dnsreq_freed = 0;
#ifdef HAVE_LIBUNBOUND
int ub_resolve_r;
#endif
#ifdef STUB_NATIVE_DNSSEC
# ifdef DNSSEC_ROADBLOCK_AVOIDANCE
@ -351,24 +360,34 @@ _getdns_submit_netreq(getdns_network_req *netreq)
dns_req->name_len, name, sizeof(name));
#ifdef HAVE_LIBUNBOUND
dns_req->freed = &dnsreq_freed;
#ifdef HAVE_UNBOUND_EVENT_API
if (_getdns_ub_loop_enabled(&dns_req->context->ub_loop))
return ub_resolve_event(dns_req->context->unbound_ctx,
ub_resolve_r = ub_resolve_event(dns_req->context->unbound_ctx,
name, netreq->request_type, netreq->owner->request_class,
netreq, ub_resolve_event_callback, &(netreq->unbound_id)) ?
GETDNS_RETURN_GENERIC_ERROR : GETDNS_RETURN_GOOD;
else
#endif
return ub_resolve_async(dns_req->context->unbound_ctx,
ub_resolve_r = ub_resolve_async(dns_req->context->unbound_ctx,
name, netreq->request_type, netreq->owner->request_class,
netreq, ub_resolve_callback, &(netreq->unbound_id)) ?
GETDNS_RETURN_GENERIC_ERROR : GETDNS_RETURN_GOOD;
if (dnsreq_freed)
return DNS_REQ_FINISHED;
dns_req->freed = NULL;
return ub_resolve_r ? GETDNS_RETURN_GENERIC_ERROR : GETDNS_RETURN_GOOD;
#else
return GETDNS_RETURN_NOT_IMPLEMENTED;
#endif
}
/* Submit with stub resolver */
return _getdns_submit_stub_request(netreq);
dns_req->freed = &dnsreq_freed;
r = _getdns_submit_stub_request(netreq);
if (dnsreq_freed)
return DNS_REQ_FINISHED;
dns_req->freed = NULL;
return r;
}
@ -457,7 +476,7 @@ getdns_general_ns(getdns_context *context, getdns_eventloop *loop,
void *userarg, getdns_network_req **return_netreq_p,
getdns_callback_t callbackfn, internal_cb_t internal_cb, int usenamespaces)
{
getdns_return_t r = GETDNS_RETURN_GOOD;
int r = GETDNS_RETURN_GOOD;
getdns_network_req *netreq, **netreq_p;
getdns_dns_req *req;
getdns_dict *localnames_response;
@ -496,8 +515,16 @@ getdns_general_ns(getdns_context *context, getdns_eventloop *loop,
/* issue all network requests */
for ( netreq_p = req->netreqs
; !r && (netreq = *netreq_p)
; netreq_p++)
r = _getdns_submit_netreq(netreq);
; netreq_p++) {
if ((r = _getdns_submit_netreq(netreq))) {
if (r == DNS_REQ_FINISHED) {
if (return_netreq_p)
*return_netreq_p = NULL;
return GETDNS_RETURN_GOOD;
}
netreq->state = NET_REQ_FINISHED;
}
}
else for (i = 0; i < context->namespace_count; i++) {
if (context->namespaces[i] == GETDNS_NAMESPACE_LOCALNAMES) {
@ -518,14 +545,21 @@ getdns_general_ns(getdns_context *context, getdns_eventloop *loop,
r = GETDNS_RETURN_GOOD;
for ( netreq_p = req->netreqs
; !r && (netreq = *netreq_p)
; netreq_p++)
r = _getdns_submit_netreq(netreq);
; netreq_p++) {
if ((r = _getdns_submit_netreq(netreq))) {
if (r == DNS_REQ_FINISHED) {
if (return_netreq_p)
*return_netreq_p = NULL;
return GETDNS_RETURN_GOOD;
}
netreq->state = NET_REQ_FINISHED;
}
}
break;
} else
r = GETDNS_RETURN_BAD_CONTEXT;
}
if (r != 0) {
if (r > 0) { /* i.e. r != GETDNS_RETURN_GOOD && r != DNS_REQ_FINISHED */
/* clean up the request */
_getdns_context_clear_outbound_request(req);
_getdns_dns_req_free(req);

4
src/general.h
View File

@ -42,9 +42,11 @@
/* private inner helper used by sync and async */
#define DNS_REQ_FINISHED -1
void _getdns_call_user_callback(getdns_dns_req *, getdns_dict *);
void _getdns_check_dns_req_complete(getdns_dns_req *dns_req);
getdns_return_t _getdns_submit_netreq(getdns_network_req *netreq);
int _getdns_submit_netreq(getdns_network_req *netreq);
getdns_return_t

5
src/request-internal.c
View File

@ -640,7 +640,8 @@ _getdns_dns_req_free(getdns_dns_req * req)
req->loop->vmt->clear(req->loop, &req->timeout);
req->timeout.timeout_cb = NULL;
}
if (req->freed)
*req->freed = 1;
GETDNS_FREE(req->my_mf, req);
}
@ -907,6 +908,8 @@ _getdns_dns_req_new(getdns_context *context, getdns_eventloop *loop,
result->upstreams->referenced++;
result->finished_next = NULL;
result->freed = NULL;
result->validating = 0;
network_req_init(result->netreqs[0], result,
request_type, dnssec_extension_set, with_opt,

4
src/test/tpkg/125-valgrind-checks.tpkg/125-valgrind-checks.test
View File

@ -6,8 +6,12 @@
cat >queries <<EOT
NS .
localhost
localhost.
A localhost.
-A getdnsapi.net
qwerlkjhasdfpuiqwyerm.1234kjhrqwersv.com
localhost.
-G TXT bogus.nlnetlabs.nl
-H 8.8.8.8
-H 2a04:b900:0:100::37

8
src/test/tpkg/330-event-loops-unit-tests.tpkg/330-event-loops-unit-tests.test
View File

@ -5,4 +5,10 @@
[ -f .tpkg.var.test ] && source .tpkg.var.test
cd "${BUILDDIR}/build-event-loops"
make test
if make test
then
if grep ERROR "${BUILDDIR}/build-event-loops/src/test/*.log"
then
exit 1
fi
fi

11
src/types-internal.h
View File

@ -306,6 +306,17 @@ typedef struct getdns_dns_req {
uint16_t tls_query_padding_blocksize;
/* The validating and freed variables are used to make sure a single
* code path is followed while processing a DNS request, even when
* callbacks are already fired whilst the registering/scheduling call
* (i.e. ub_resolve_event) has not returned yet.
*
* validating is touched by _getdns_get_validation_chain only and
* freed is touched by _getdns_submit_netreq only
*/
int validating;
int *freed;
/* internally scheduled request */
internal_cb_t internal_cb;