mir/bind
2
0
Fork 0
mirror of https://gitlab.isc.org/isc-projects/bind9 synced 2025-08-30 22:15:20 +00:00
Code Issues Releases Wiki Activity

4857. [bug] Maintain attach/detach semantics for event->db,

Browse Source 
event->node, event->rdataset and event->sigrdataset
                        in query.c. [RT #46891]
This commit is contained in:
Mark Andrews
2018-01-04 10:48:18 +11:00
parent a280a7871d
commit eed2f6cef0
3 changed files with 65 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
CHANGES
View File

@@ -1,3 +1,7 @@
4857. [bug] Maintain attach/detach semantics for event->db,
event->node, event->rdataset and event->sigrdataset
in query.c. [RT #46891]
4856. [bug] 'rndc zonestatus' reported the wrong underlying type
for a inline slave zone. [RT #46875]

1
bin/tests/system/addzone/ns2/.gitignore vendored Normal file
View File

@@ -0,0 +1 @@
redirect.db

94
lib/ns/query.c
View File

@@ -1686,7 +1686,6 @@ query_addadditional(void *arg, const dns_name_t *name, dns_rdatatype_t qtype) {
* the GLUEOK flag. Glue will be looked for later, but not
* necessarily in the same database.
*/
node = NULL;
result = dns_db_findext(db, name, version, type,
client->query.dboptions,
client->now, &node, fname, &cm, &ci,
@@ -2357,6 +2356,33 @@ fixfname(ns_client_t *client, dns_name_t **fname, isc_buffer_t **dbuf,
}
}
static void
free_devent(ns_client_t *client, isc_event_t **eventp,
dns_fetchevent_t **deventp)
{
dns_fetchevent_t *devent = *deventp;
REQUIRE((void*)(*eventp) == (void *)(*deventp));
if (devent->fetch != NULL)
dns_resolver_destroyfetch(&devent->fetch);
if (devent->node != NULL)
dns_db_detachnode(devent->db, &devent->node);
if (devent->db != NULL)
dns_db_detach(&devent->db);
if (devent->rdataset != NULL)
query_putrdataset(client, &devent->rdataset);
if (devent->rdataset != NULL)
query_putrdataset(client, &devent->sigrdataset);
/*
* If the two pointers are the same then leave the setting of
* (*deventp) to NULL to isc_event_free.
*/
if ((void *)eventp != (void *)deventp)
(*deventp) = NULL;
isc_event_free(eventp);
}
static void
prefetch_done(isc_task_t *task, isc_event_t *event) {
dns_fetchevent_t *devent = (dns_fetchevent_t *)event;
@@ -2375,14 +2401,7 @@ prefetch_done(isc_task_t *task, isc_event_t *event) {
client->query.prefetch = NULL;
}
UNLOCK(&client->query.fetchlock);
if (devent->fetch != NULL)
dns_resolver_destroyfetch(&devent->fetch);
if (devent->node != NULL)
dns_db_detachnode(devent->db, &devent->node);
if (devent->db != NULL)
dns_db_detach(&devent->db);
query_putrdataset(client, &devent->rdataset);
isc_event_free(&event);
free_devent(client, &event, &devent);
ns_client_detach(&client);
}
@@ -2674,8 +2693,7 @@ rpz_rrset_find(ns_client_t *client, dns_name_t *name, dns_rdatatype_t type,
st->r.db = NULL;
if (*rdatasetp != NULL)
query_putrdataset(client, rdatasetp);
*rdatasetp = st->r.r_rdataset;
st->r.r_rdataset = NULL;
SAVE(*rdatasetp, st->r.r_rdataset);
result = st->r.r_result;
if (result == DNS_R_DELEGATION) {
CTRACE(ISC_LOG_ERROR, "RPZ recursing");
@@ -5014,6 +5032,7 @@ qctx_freedata(query_ctx_t *qctx) {
}
if (qctx->db != NULL) {
INSIST(qctx->node == NULL);
dns_db_detach(&qctx->db);
}
@@ -5031,7 +5050,8 @@ qctx_freedata(query_ctx_t *qctx) {
}
if (qctx->event != NULL) {
isc_event_free(ISC_EVENT_PTR(&qctx->event));
free_devent(qctx->client,
ISC_EVENT_PTR(&qctx->event), &qctx->event);
}
}
@@ -5422,7 +5442,7 @@ query_lookup(query_ctx_t *qctx) {
static void
fetch_callback(isc_task_t *task, isc_event_t *event) {
dns_fetchevent_t *devent = (dns_fetchevent_t *)event;
dns_fetch_t *fetch;
dns_fetch_t *fetch = NULL;
ns_client_t *client;
isc_boolean_t fetch_canceled, client_shuttingdown;
isc_result_t result;
@@ -5460,8 +5480,7 @@ fetch_callback(isc_task_t *task, isc_event_t *event) {
INSIST(client->query.fetch == NULL);
client->query.attributes &= ~NS_QUERYATTR_RECURSING;
fetch = devent->fetch;
devent->fetch = NULL;
SAVE(fetch, devent->fetch);
/*
* If this client is shutting down, or this transaction
@@ -5469,14 +5488,7 @@ fetch_callback(isc_task_t *task, isc_event_t *event) {
*/
client_shuttingdown = ns_client_shuttingdown(client);
if (fetch_canceled || client_shuttingdown) {
if (devent->node != NULL)
dns_db_detachnode(devent->db, &devent->node);
if (devent->db != NULL)
dns_db_detach(&devent->db);
query_putrdataset(client, &devent->rdataset);
if (devent->sigrdataset != NULL)
query_putrdataset(client, &devent->sigrdataset);
isc_event_free(&event);
free_devent(client, &event, &devent);
if (fetch_canceled) {
CTRACE(ISC_LOG_ERROR, "fetch cancelled");
query_error(client, DNS_R_SERVFAIL, __LINE__);
@@ -5711,11 +5723,11 @@ query_resume(query_ctx_t *qctx) {
RESTORE(qctx->sigrdataset, qctx->rpz_st->q.sigrdataset);
qctx->qtype = qctx->rpz_st->q.qtype;
qctx->rpz_st->r.db = qctx->event->db;
if (qctx->event->node != NULL)
dns_db_detachnode(qctx->event->db, &qctx->event->node);
SAVE(qctx->rpz_st->r.db, qctx->event->db);
qctx->rpz_st->r.r_type = qctx->event->qtype;
qctx->rpz_st->r.r_rdataset = qctx->event->rdataset;
SAVE(qctx->rpz_st->r.r_rdataset, qctx->event->rdataset);
query_putrdataset(qctx->client, &qctx->event->sigrdataset);
} else if (REDIRECT(qctx->client)) {
/*
@@ -5761,10 +5773,10 @@ query_resume(query_ctx_t *qctx) {
qctx->authoritative = ISC_FALSE;
qctx->qtype = qctx->event->qtype;
qctx->db = qctx->event->db;
qctx->node = qctx->event->node;
qctx->rdataset = qctx->event->rdataset;
qctx->sigrdataset = qctx->event->sigrdataset;
SAVE(qctx->db, qctx->event->db);
SAVE(qctx->node, qctx->event->node);
SAVE(qctx->rdataset, qctx->event->rdataset);
SAVE(qctx->sigrdataset, qctx->event->sigrdataset);
}
INSIST(qctx->rdataset != NULL);
@@ -5847,7 +5859,8 @@ query_resume(query_ctx_t *qctx) {
(qctx->rpz_st->state & DNS_RPZ_RECURSING) != 0) {
qctx->rpz_st->r.r_result = qctx->event->result;
result = qctx->rpz_st->q.result;
isc_event_free(ISC_EVENT_PTR(&qctx->event));
free_devent(qctx->client,
ISC_EVENT_PTR(&qctx->event), &qctx->event);
} else if (REDIRECT(qctx->client)) {
result = qctx->client->query.redirect.result;
qctx->is_zone = qctx->client->query.redirect.is_zone;
@@ -7451,6 +7464,7 @@ static isc_result_t
query_zone_delegation(query_ctx_t *qctx) {
isc_result_t result;
dns_rdataset_t **sigrdatasetp = NULL;
isc_boolean_t detach = ISC_FALSE;
/*
* If the query type is DS, look to see if we are
@@ -7547,7 +7561,10 @@ query_zone_delegation(query_ctx_t *qctx) {
* We enable the retrieval of glue for this
* database by setting client->query.gluedb.
*/
qctx->client->query.gluedb = qctx->db;
if (qctx->db != NULL && qctx->client->query.gluedb == NULL) {
dns_db_attach(qctx->db, &qctx->client->query.gluedb);
detach = ISC_TRUE;
}
qctx->client->query.isreferral = ISC_TRUE;
/*
* We must ensure NOADDITIONAL is off,
@@ -7562,7 +7579,9 @@ query_zone_delegation(query_ctx_t *qctx) {
query_addrrset(qctx->client, &qctx->fname,
&qctx->rdataset, sigrdatasetp,
qctx->dbuf, DNS_SECTION_AUTHORITY);
qctx->client->query.gluedb = NULL;
if (detach) {
dns_db_detach(&qctx->client->query.gluedb);
}
/*
* Add a DS if needed
@@ -7584,6 +7603,7 @@ static isc_result_t
query_delegation(query_ctx_t *qctx) {
isc_result_t result;
dns_rdataset_t **sigrdatasetp = NULL;
isc_boolean_t detach = ISC_FALSE;
qctx->authoritative = ISC_FALSE;
@@ -7711,9 +7731,13 @@ query_delegation(query_ctx_t *qctx) {
* This is the best answer.
*/
qctx->client->query.attributes |= NS_QUERYATTR_CACHEGLUEOK;
qctx->client->query.gluedb = qctx->zdb;
qctx->client->query.isreferral = ISC_TRUE;
if (qctx->zdb != NULL && qctx->client->query.gluedb == NULL) {
dns_db_attach(qctx->zdb, &qctx->client->query.gluedb);
detach = ISC_TRUE;
}
/*
* We must ensure NOADDITIONAL is off,
* because the generation of
@@ -7727,8 +7751,10 @@ query_delegation(query_ctx_t *qctx) {
query_addrrset(qctx->client, &qctx->fname,
&qctx->rdataset, sigrdatasetp,
qctx->dbuf, DNS_SECTION_AUTHORITY);
qctx->client->query.gluedb = NULL;
qctx->client->query.attributes &= ~NS_QUERYATTR_CACHEGLUEOK;
if (detach) {
dns_db_detach(&qctx->client->query.gluedb);
}
/*
* Add a DS if needed