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Code Issues Releases Wiki Activity

yet another major reorganization of client shutdown

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procedures, in preparation for client timeouts
This commit is contained in:
Andreas Gustafsson
2000-02-10 22:16:56 +00:00
parent 26e1af486a
commit e5f8f2659b
3 changed files with 362 additions and 190 deletions
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524
bin/named/client.c
View File

@@ -33,17 +33,31 @@
#include <dns/rdatalist.h>
#include <dns/rdataset.h>
#include <dns/view.h>
#include <dns/xfrin.h>
#include <dns/zone.h>
#include <named/globals.h>
#include <named/client.h>
#include <named/globals.h>
#include <named/interfacemgr.h>
#include <named/log.h>
#include <named/notify.h>
#include <named/query.h>
#include <named/server.h>
#include <named/update.h>
#include <named/notify.h>
#include <named/interfacemgr.h>
/***
*** Client
***/
/*
* Important note!
*
* All client state changes, other than that from idle to listening, occur
* as a result of events. This guarantees serialization and avoids the
* need for locking.
*
* If a routine is ever created that allows someone other than the client's
* task to change the client, then the client will have to be locked.
*/
#define NS_CLIENT_TRACE
#ifdef NS_CLIENT_TRACE
@@ -73,53 +87,97 @@ struct ns_clientmgr {
/* Locked by lock. */
isc_boolean_t exiting;
client_list_t active; /* Active clients */
client_list_t inactive; /* Recycling center */
client_list_t inactive; /* To be recycled */
};
#define MANAGER_MAGIC 0x4E53436DU /* NSCm */
#define VALID_MANAGER(m) ((m) != NULL && \
(m)->magic == MANAGER_MAGIC)
/*
* Client object states. Ordering is significant: higher-numbered
* states are generally "more active", meaning that the client can
* have more dynamically allocated data, outstanding events, etc.
* In the list below, any such properties listed for state N
* also apply to any state > N.
*
* To force the client into a less active state, set client->newstate
* to that state and call exit_check(). This will cause any
* activities defined for higher-numbered states to be aborted.
*/
#define NS_CLIENTSTATE_FREED 0
/*
* The client object no longer exists.
*/
#define NS_CLIENTSTATE_INACTIVE 1
/*
* The client object exists and has a task and timer.
* Its "query" struct and sendbuf are initialized.
* It is on the client manager's list of inactive clients.
* It has a message and OPT, both in the reset state.
*/
#define NS_CLIENTSTATE_READY 2
/*
* The client object is either a TCP or a UDP one, and
* it is associated with a network interface. It is on the
* client manager's list of active clients.
*
* If it is a TCP client object, it has a TCP listener socket
* and an outstading TCP listen request.
*
* If it is a UDP client object, it is associated with a
* dispatch and has an outstanding dispatch request.
*/
#define NS_CLIENTSTATE_READING 3
/*
* The client object is a TCP client object that has received
* a connection. It has a tcpsocket, tcpmsg, TCP quota, and an
* outstanding TCP read request. This state is not used for
* UDP client objects.
*/
#define NS_CLIENTSTATE_WORKING 4
/*
* The client object has received a request and is working
* on it. It has a view, and it may have any of a non-reset OPT,
* recursion quota, and an outstanding write request. If it
* is a UDP client object, it has a dispatch event.
*/
#define NS_CLIENTSTATE_MAX 9
/*
* Sentinel value used to indicate "no state". When client->newstate
* has this value, we are not attempting to exit the current state.
* Must be greater than any valid state.
*/
static void client_read(ns_client_t *client);
static void client_accept(ns_client_t *client);
static void clientmgr_destroy(ns_clientmgr_t *manager);
/***
*** Client
***/
static isc_boolean_t exit_check(ns_client_t *client);
static void ns_client_endrequest(ns_client_t *client);
/*
* Important note!
* Enter the inactive state.
*
* All client state changes, other than that from idle to listening, occur
* as a result of events. This guarantees serialization and avoids the
* need for locking.
*
* If a routine is ever created that allows someone other than the client's
* task to change the client, then the client will have to be locked.
*/
static void
release_quotas(ns_client_t *client) {
if (client->tcpquota != NULL)
isc_quota_detach(&client->tcpquota);
if (client->recursionquota != NULL)
isc_quota_detach(&client->recursionquota);
}
/*
* Enter an inactive state identical to that of a newly created client.
* Requires:
* No requests are outstanding.
*/
static void
deactivate(ns_client_t *client)
{
CTRACE("deactivate");
client_deactivate(ns_client_t *client) {
REQUIRE(NS_CLIENT_VALID(client));
if (client->interface)
ns_interface_detach(&client->interface);
INSIST(client->naccepts == 0);
if (client->tcplistener != NULL)
isc_socket_detach(&client->tcplistener);
if (client->dispentry != NULL) {
dns_dispatchevent_t **deventp;
if (client->dispevent != NULL)
@@ -130,31 +188,27 @@ deactivate(ns_client_t *client)
&client->dispentry,
deventp);
}
if (client->dispatch != NULL)
dns_dispatch_detach(&client->dispatch);
INSIST(client->naccepts == 0);
if (client->tcplistener != NULL)
isc_socket_detach(&client->tcplistener);
if (client->tcpmsg_valid) {
dns_tcpmsg_invalidate(&client->tcpmsg);
client->tcpmsg_valid = ISC_FALSE;
}
if (client->tcpsocket != NULL)
isc_socket_detach(&client->tcpsocket);
client->attributes = 0;
client->mortal = ISC_FALSE;
LOCK(&client->manager->lock);
ISC_LIST_UNLINK(client->manager->active, client, link);
ISC_LIST_APPEND(client->manager->inactive, client, link);
client->list = &client->manager->inactive;
UNLOCK(&client->manager->lock);
}
/*
* Free a client immediately if possible, otherwise start
* shutting it down and postpone freeing to later.
* Clean up a client object and free its memory.
* Requires:
* The client is in the inactive state.
*/
static void
maybe_free(ns_client_t *client) {
client_free(ns_client_t *client) {
isc_boolean_t need_clientmgr_destroy = ISC_FALSE;
ns_clientmgr_t *manager = NULL;
@@ -166,39 +220,7 @@ maybe_free(ns_client_t *client) {
* set up. Thus, we have no outstanding shutdown
* event at this point.
*/
REQUIRE(client->shuttingdown == ISC_TRUE);
if (client->naccepts > 0)
isc_socket_cancel(client->tcplistener, client->task,
ISC_SOCKCANCEL_ACCEPT);
if (client->nreads > 0)
dns_tcpmsg_cancelread(&client->tcpmsg);
if (client->nsends > 0) {
isc_socket_t *socket;
if (TCP_CLIENT(client))
socket = client->tcpsocket;
else
socket = dns_dispatch_getsocket(client->dispatch);
isc_socket_cancel(socket, client->task, ISC_SOCKCANCEL_SEND);
}
/*
* We need to detach from the view early, because when shutting
* down the server, resolver shutdown does not begin until
* the view refcount goes to zero.
*/
if (client->view != NULL)
dns_view_detach(&client->view);
if (!(client->nreads == 0 && client->naccepts == 0 &&
client->nsends == 0 && client->nwaiting == 0)) {
/* Still waiting for events. */
return;
}
/* We have received our last event. */
deactivate(client);
REQUIRE(client->state == NS_CLIENTSTATE_INACTIVE);
ns_query_free(client);
isc_mem_put(client->mctx, client->sendbuf, SEND_BUFFER_SIZE);
@@ -218,14 +240,12 @@ maybe_free(ns_client_t *client) {
ISC_LIST_UNLINK(*client->list, client, link);
client->list = NULL;
if (manager->exiting &&
(ISC_LIST_EMPTY(manager->active) &&
ISC_LIST_EMPTY(manager->inactive)))
ISC_LIST_EMPTY(manager->active) &&
ISC_LIST_EMPTY(manager->inactive))
need_clientmgr_destroy = ISC_TRUE;
UNLOCK(&manager->lock);
}
release_quotas(client);
CTRACE("free");
client->magic = 0;
isc_mem_put(client->mctx, client, sizeof *client);
@@ -234,6 +254,145 @@ maybe_free(ns_client_t *client) {
clientmgr_destroy(manager);
}
/*
* Check for a deactivation or shutdown request and take appropriate
* action. Returns ISC_TRUE if either is in progress; in this case
* the caller must no longer use the client object as it may have been
* freed.
*/
static isc_boolean_t
exit_check(ns_client_t *client) {
REQUIRE(NS_CLIENT_VALID(client));
if (client->state <= client->newstate)
return (ISC_FALSE); /* Business as usual. */
/*
* We need to detach from the view early when shutting down
* the server to break the following vicious circle:
*
* - The resolver will not shut down until the view refcount is zero
* - The view refcount does not go to zero until all clients detach
* - The client does not detach from the view until nwaiting is zero
* - nwaiting does not go to zero until the resolver has shut down
*
*/
if (client->newstate == NS_CLIENTSTATE_FREED && client->view != NULL)
dns_view_detach(&client->view);
if (client->state == NS_CLIENTSTATE_WORKING) {
INSIST(client->newstate <= NS_CLIENTSTATE_READING);
/*
* We are trying to abort request processing.
*/
if (client->nsends > 0) {
isc_socket_t *socket;
if (TCP_CLIENT(client))
socket = client->tcpsocket;
else
socket =
dns_dispatch_getsocket(client->dispatch);
isc_socket_cancel(socket, client->task,
ISC_SOCKCANCEL_SEND);
}
if (! (client->nsends == 0 && client->nwaiting == 0)) {
/*
* Still waiting for I/O cancel completion.
* or lingering references.
*/
return (ISC_TRUE);
}
/*
* I/O cancel is complete. Burn down all state
* related to the current request.
*/
ns_client_endrequest(client);
client->state = NS_CLIENTSTATE_READING;
if (NS_CLIENTSTATE_READING == client->newstate) {
client_read(client);
client->newstate = NS_CLIENTSTATE_MAX;
return (ISC_TRUE); /* We're done. */
}
}
if (client->state == NS_CLIENTSTATE_READING) {
/*
* We are trying to abort the current TCP connection,
* if any.
*/
INSIST(client->newstate <= NS_CLIENTSTATE_READY);
if (client->nreads > 0)
dns_tcpmsg_cancelread(&client->tcpmsg);
if (! client->nreads == 0) {
/* Still waiting for read cancel completion. */
return (ISC_TRUE);
}
if (client->tcpmsg_valid) {
dns_tcpmsg_invalidate(&client->tcpmsg);
client->tcpmsg_valid = ISC_FALSE;
}
if (client->tcpsocket != NULL)
isc_socket_detach(&client->tcpsocket);
if (client->tcpquota != NULL)
isc_quota_detach(&client->tcpquota);
client->state = NS_CLIENTSTATE_READY;
if (NS_CLIENTSTATE_READY == client->newstate) {
if (TCP_CLIENT(client)) {
client_accept(client);
} else {
/*
* Give the processed dispatch event back to
* the dispatch. This tells the dispatch
* that we are ready to receive the next event.
*/
dns_dispatch_freeevent(client->dispatch,
client->dispentry,
&client->dispevent);
}
client->newstate = NS_CLIENTSTATE_MAX;
return (ISC_TRUE);
}
}
if (client->state == NS_CLIENTSTATE_READY) {
INSIST(client->newstate <= NS_CLIENTSTATE_INACTIVE);
/*
* We are trying to enter the inactive state.
*/
if (client->naccepts > 0)
isc_socket_cancel(client->tcplistener, client->task,
ISC_SOCKCANCEL_ACCEPT);
if (! (client->naccepts == 0)) {
/* Still waiting for accept cancel completion. */
return (ISC_TRUE);
}
/* Accept cancel is complete. */
client_deactivate(client);
client->state = NS_CLIENTSTATE_INACTIVE;
if (client->state == client->newstate) {
client->newstate = NS_CLIENTSTATE_MAX;
return (ISC_TRUE); /* We're done. */
}
}
if (client->state == NS_CLIENTSTATE_INACTIVE) {
INSIST(client->newstate == NS_CLIENTSTATE_FREED);
/*
* We are trying to free the client.
*/
client_free(client);
return (ISC_TRUE);
}
INSIST(0);
return (ISC_TRUE);
}
/*
* The client's task has received a shutdown event.
*/
@@ -249,41 +408,31 @@ client_shutdown(isc_task_t *task, isc_event_t *event) {
CTRACE("shutdown");
client->shuttingdown = ISC_TRUE;
if (client->shutdown != NULL)
(client->shutdown)(client->shutdown_arg);
maybe_free(client);
isc_event_free(&event);
client->newstate = NS_CLIENTSTATE_FREED;
(void) exit_check(client);
}
/*
* Wrap up after a finished client request and prepare for
* handling the next one.
*/
void
ns_client_next(ns_client_t *client, isc_result_t result) {
REQUIRE(NS_CLIENT_VALID(client));
CTRACE("next");
static void
ns_client_endrequest(ns_client_t *client) {
INSIST(client->naccepts == 0);
INSIST(client->nreads == 0);
INSIST(client->nsends == 0);
INSIST(client->lockview == NULL);
CTRACE("endrequest");
INSIST(client->state == NS_CLIENTSTATE_WORKING);
if (client->next != NULL) {
(client->next)(client, result);
(client->next)(client);
client->next = NULL;
}
/*
* XXXRTH If result != ISC_R_SUCCESS:
* Log result if there is interest in doing so.
*/
if (client->view != NULL)
dns_view_detach(&client->view);
if (client->opt != NULL) {
@@ -295,13 +444,15 @@ ns_client_next(ns_client_t *client, isc_result_t result) {
client->udpsize = 512;
dns_message_reset(client->message, DNS_MESSAGE_INTENTPARSE);
release_quotas(client);
if (client->recursionquota != NULL)
isc_quota_detach(&client->recursionquota);
if (client->mortal) {
/*
* This client object is supposed to die now, but if we
* have fewer client objects than planned due to
* quota exhaustion, don't.
* This client object should normally go inactive
* at this point, but if we have fewer active client
* objects than desired due to earlier quota exhaustion,
* keep it active to make up for the shortage.
*/
isc_boolean_t need_another_client = ISC_FALSE;
if (TCP_CLIENT(client)) {
@@ -322,52 +473,41 @@ ns_client_next(ns_client_t *client, isc_result_t result) {
/*
* We don't need this client object. Recycle it.
*/
LOCK(&client->manager->lock);
ISC_LIST_UNLINK(client->manager->active, client, link);
deactivate(client);
ISC_LIST_APPEND(client->manager->inactive, client, link);
client->list = &client->manager->inactive;
UNLOCK(&client->manager->lock);
return;
}
client->mortal = ISC_FALSE;
}
if (client->dispevent != NULL) {
/*
* Give the processed dispatch event back to the dispatch.
* This tells the dispatch that we are ready to receive
* the next event.
*/
dns_dispatch_freeevent(client->dispatch, client->dispentry,
&client->dispevent);
} else if (TCP_CLIENT(client)) {
if (result == ISC_R_SUCCESS) {
client_read(client);
} else {
/*
* There was an error processing a TCP request.
* It may have have left the connection out of
* sync. Close the connection and listen for a
* new one.
*/
if (client->tcpsocket != NULL) {
/*
* There should be no outstanding read
* request on the TCP socket at this point,
* therefore invalidating the tcpmsg is safe.
*/
INSIST(client->nreads == 0);
INSIST(client->tcpmsg_valid == ISC_TRUE);
dns_tcpmsg_invalidate(&client->tcpmsg);
client->tcpmsg_valid = ISC_FALSE;
isc_socket_detach(&client->tcpsocket);
}
client_accept(client);
if (client->newstate >= NS_CLIENTSTATE_INACTIVE)
client->newstate = NS_CLIENTSTATE_INACTIVE;
}
}
}
void
ns_client_next(ns_client_t *client, isc_result_t result) {
int newstate;
REQUIRE(NS_CLIENT_VALID(client));
REQUIRE(client->state == NS_CLIENTSTATE_WORKING);
CTRACE("next");
if (result != ISC_R_SUCCESS) {
isc_log_write(dns_lctx, DNS_LOGCATEGORY_SECURITY,
NS_LOGMODULE_CLIENT, ISC_LOG_DEBUG(3),
"request failed: %s", isc_result_totext(result));
}
/*
* An error processing a TCP request may have left
* the connection out of sync. To be safe, we always
* sever the connection when result != ISC_R_SUCCESS.
*/
if (result == ISC_R_SUCCESS && TCP_CLIENT(client))
newstate = NS_CLIENTSTATE_READING;
else
newstate = NS_CLIENTSTATE_READY;
if (client->newstate > newstate)
client->newstate = newstate;
(void) exit_check(client);
}
static void
client_senddone(isc_task_t *task, isc_event_t *event) {
ns_client_t *client;
@@ -386,10 +526,8 @@ client_senddone(isc_task_t *task, isc_event_t *event) {
isc_event_free(&event);
if (client->shuttingdown) {
maybe_free(client);
if (exit_check(client))
return;
}
ns_client_next(client, ISC_R_SUCCESS);
}
@@ -478,7 +616,7 @@ ns_client_send(ns_client_t *client) {
socket = client->tcpsocket;
address = NULL;
isc_buffer_used(&buffer, &r);
isc_buffer_putuint16(&tcpbuffer, (isc_uint16_t)r.length);
isc_buffer_putuint16(&tcpbuffer, (isc_uint16_t) r.length);
isc_buffer_add(&tcpbuffer, r.length);
isc_buffer_used(&tcpbuffer, &r);
} else {
@@ -528,12 +666,6 @@ ns_client_error(ns_client_t *client, isc_result_t result) {
*/
result = dns_message_reply(message, ISC_FALSE);
if (result != ISC_R_SUCCESS) {
/*
* There's no hope of replying to this request.
*
* XXXRTH Mark this client to that if it is a
* TCP session, the session will be closed.
*/
ns_client_next(client, result);
return;
}
@@ -614,6 +746,11 @@ client_request(isc_task_t *task, isc_event_t *event) {
INSIST(client->recursionquota == NULL);
INSIST(client->state ==
TCP_CLIENT(client) ?
NS_CLIENTSTATE_READING :
NS_CLIENTSTATE_READY);
RWLOCK(&ns_g_server->conflock, isc_rwlocktype_read);
dns_zonemgr_lockconf(ns_g_server->zonemgr, isc_rwlocktype_read);
@@ -634,10 +771,9 @@ client_request(isc_task_t *task, isc_event_t *event) {
CTRACE("request");
if (client->shuttingdown) {
maybe_free(client);
if (exit_check(client))
goto cleanup_serverlock;
}
client->state = NS_CLIENTSTATE_WORKING;
isc_stdtime_get(&client->requesttime);
client->now = client->requesttime;
@@ -848,7 +984,9 @@ client_timeout(isc_task_t *task, isc_event_t *event) {
isc_event_free(&event);
ns_client_next(client, ISC_R_TIMEDOUT);
if (client->newstate > NS_CLIENTSTATE_READY)
client->newstate = NS_CLIENTSTATE_READY;
(void) exit_check(client);
}
static isc_result_t
@@ -902,7 +1040,8 @@ client_create(ns_clientmgr_t *manager, ns_client_t **clientp)
client->magic = NS_CLIENT_MAGIC;
client->mctx = manager->mctx;
client->manager = NULL;
client->shuttingdown = ISC_FALSE;
client->state = NS_CLIENTSTATE_INACTIVE;
client->newstate = NS_CLIENTSTATE_MAX;
client->naccepts = 0;
client->nreads = 0;
client->nsends = 0;
@@ -967,15 +1106,36 @@ client_create(ns_clientmgr_t *manager, ns_client_t **clientp)
static void
client_read(ns_client_t *client) {
isc_result_t result;
#ifdef notyet
isc_interval_t interval;
#endif
CTRACE("read");
#ifdef notyet
/*
* Set a timeout to limit the amount of time we will wait
* for a request on this TCP connection.
*/
isc_interval_set(&interval, 2, 0); /* XXX */
result = isc_timer_reset(client->timer, isc_timertype_once, NULL,
&interval, ISC_FALSE);
if (result != ISC_R_SUCCESS)
goto fail;
#endif
result = dns_tcpmsg_readmessage(&client->tcpmsg, client->task,
client_request, client);
if (result != ISC_R_SUCCESS)
ns_client_next(client, result);
goto fail;
client->state = client->newstate = NS_CLIENTSTATE_READING;
INSIST(client->nreads == 0);
client->nreads++;
return;
fail:
ns_client_next(client, result);
}
static void
@@ -988,6 +1148,8 @@ client_newconn(isc_task_t *task, isc_event_t *event) {
REQUIRE(NS_CLIENT_VALID(client));
REQUIRE(client->task == task);
INSIST(client->state == NS_CLIENTSTATE_READY);
CTRACE("newconn");
INSIST(client->naccepts == 1);
@@ -1003,9 +1165,10 @@ client_newconn(isc_task_t *task, isc_event_t *event) {
* check to make sure it gets destroyed.
*/
client->tcpsocket = nevent->newsocket;
client->state = NS_CLIENTSTATE_READING;
if (client->shuttingdown) {
maybe_free(client);
if (exit_check(client)) {
;
} else if (nevent->result == ISC_R_SUCCESS) {
INSIST(client->tcpmsg_valid == ISC_FALSE);
dns_tcpmsg_init(client->mctx, client->tcpsocket,
@@ -1079,15 +1242,14 @@ ns_client_wait(ns_client_t *client) {
isc_boolean_t
ns_client_shuttingdown(ns_client_t *client) {
return (client->shuttingdown);
return (client->newstate == NS_CLIENTSTATE_FREED);
}
void
ns_client_unwait(ns_client_t *client) {
client->nwaiting--;
INSIST(client->nwaiting >= 0);
if (client->shuttingdown)
maybe_free(client);
(void) exit_check(client);
}
isc_result_t
@@ -1238,22 +1400,30 @@ ns_clientmgr_createclients(ns_clientmgr_t *manager, unsigned int n,
break;
}
client->state = NS_CLIENTSTATE_READY;
ns_interface_attach(ifp, &client->interface);
if (tcp) {
client->attributes |= NS_CLIENTATTR_TCP;
isc_socket_attach(ifp->tcpsocket, &client->tcplistener);
isc_socket_attach(ifp->tcpsocket,
&client->tcplistener);
client_accept(client);
} else {
dns_dispatch_attach(ifp->udpdispatch, &client->dispatch);
dns_dispatch_attach(ifp->udpdispatch,
&client->dispatch);
result = dns_dispatch_addrequest(client->dispatch,
client->task,
client_request,
client, &client->dispentry);
client,
&client->dispentry);
if (result != ISC_R_SUCCESS) {
isc_log_write(dns_lctx, DNS_LOGCATEGORY_SECURITY,
NS_LOGMODULE_CLIENT, ISC_LOG_DEBUG(3),
"dns_dispatch_addrequest() failed: %s",
isc_log_write(dns_lctx,
DNS_LOGCATEGORY_SECURITY,
NS_LOGMODULE_CLIENT,
ISC_LOG_DEBUG(3),
"dns_dispatch_addrequest() "
"failed: %s",
isc_result_totext(result));
isc_task_shutdown(client->task);
break;

6
bin/named/include/named/client.h
View File

@@ -82,7 +82,9 @@ struct ns_client {
unsigned int magic;
isc_mem_t * mctx;
ns_clientmgr_t * manager;
isc_boolean_t shuttingdown;
int state;
int newstate;
isc_boolean_t disconnect;
int naccepts;
int nreads;
int nsends;
@@ -103,7 +105,7 @@ struct ns_client {
unsigned char * sendbuf;
dns_rdataset_t * opt;
isc_uint16_t udpsize;
void (*next)(ns_client_t *, isc_result_t);
void (*next)(ns_client_t *);
void (*shutdown)(void *arg);
void *shutdown_arg;
ns_query_t query;

14
bin/named/query.c
View File

@@ -183,8 +183,7 @@ query_reset(ns_client_t *client, isc_boolean_t everything) {
}
static void
query_next(ns_client_t *client, isc_result_t result) {
(void)result;
query_next(ns_client_t *client) {
query_reset(client, ISC_FALSE);
}
@@ -1678,11 +1677,10 @@ query_resume(isc_task_t *task, isc_event_t *event) {
query_putrdataset(client, &devent->rdataset);
query_putrdataset(client, &devent->sigrdataset);
isc_event_free(&event);
ns_client_next(client, ISC_R_CANCELED);
/* This may destroy the client. */
ns_client_unwait(client);
} else {
ns_client_unwait(client);
RWLOCK(&ns_g_server->conflock, isc_rwlocktype_read);
dns_zonemgr_lockconf(ns_g_server->zonemgr, isc_rwlocktype_read);
dns_view_attach(client->view, &client->lockview);
@@ -1759,7 +1757,6 @@ query_recurse(ns_client_t *client, dns_rdatatype_t qtype, dns_name_t *qdomain,
* is shutting down will not be destroyed until all the
* events have been received.
*/
ns_client_wait(client);
} else {
query_putrdataset(client, &rdataset);
query_putrdataset(client, &sigrdataset);
@@ -2598,9 +2595,10 @@ query_find(ns_client_t *client, dns_fetchevent_t *event) {
goto restart;
}
if (eresult != ISC_R_SUCCESS && !PARTIALANSWER(client))
if (eresult != ISC_R_SUCCESS && !PARTIALANSWER(client)) {
ns_client_error(client, eresult);
else if (!RECURSING(client)) {
ns_client_unwait(client);
} else if (!RECURSING(client)) {
/*
* We are done. Make a final tweak to the AA bit if the
* auth-nxdomain config option says so, then send the
@@ -2611,6 +2609,7 @@ query_find(ns_client_t *client, dns_fetchevent_t *event) {
client->message->flags |= DNS_MESSAGEFLAG_AA;
ns_client_send(client);
ns_client_unwait(client);
}
CTRACE("query_find: done");
}
@@ -2803,5 +2802,6 @@ ns_query_start(ns_client_t *client) {
*/
message->flags |= DNS_MESSAGEFLAG_AD;
ns_client_wait(client);
query_find(client, NULL);
}