diff --git a/modules/proxy/mod_proxy.h b/modules/proxy/mod_proxy.h
index 57cc92f..fbbd508 100644
--- a/modules/proxy/mod_proxy.h
+++ b/modules/proxy/mod_proxy.h
@@ -288,12 +288,15 @@ typedef struct {
/* Connection pool */
struct proxy_conn_pool {
- apr_pool_t *pool; /* The pool used in constructor and destructor calls */
- apr_sockaddr_t *addr; /* Preparsed remote address info */
- apr_reslist_t *res; /* Connection resource list */
- proxy_conn_rec *conn; /* Single connection for prefork mpm */
+ apr_pool_t *pool; /* The pool used in constructor and destructor calls */
+ apr_sockaddr_t *addr; /* Preparsed remote address info */
+ apr_reslist_t *res; /* Connection resource list */
+ proxy_conn_rec *conn; /* Single connection for prefork mpm */
+ apr_pool_t *dns_pool; /* The pool used for worker scoped DNS resolutions */
};
+#define AP_VOLATILIZE_T(T, x) (*(T volatile *)&(x))
+
/* worker status bits */
/*
* NOTE: Keep up-to-date w/ proxy_wstat_tbl[]
@@ -475,7 +478,9 @@ struct proxy_worker {
proxy_conn_pool *cp; /* Connection pool to use */
proxy_worker_shared *s; /* Shared data */
proxy_balancer *balancer; /* which balancer am I in? */
+#if APR_HAS_THREADS
apr_thread_mutex_t *tmutex; /* Thread lock for updating address cache */
+#endif
void *context; /* general purpose storage */
ap_conf_vector_t *section_config; /* <Proxy>-section wherein defined */
};
@@ -534,7 +539,9 @@ struct proxy_balancer {
apr_time_t wupdated; /* timestamp of last change to workers list */
proxy_balancer_method *lbmethod;
apr_global_mutex_t *gmutex; /* global lock for updating list of workers */
+#if APR_HAS_THREADS
apr_thread_mutex_t *tmutex; /* Thread lock for updating shm */
+#endif
proxy_server_conf *sconf;
void *context; /* general purpose storage */
proxy_balancer_shared *s; /* Shared data */
diff --git a/modules/proxy/mod_proxy_balancer.c b/modules/proxy/mod_proxy_balancer.c
index c59f5e9..3a28038 100644
--- a/modules/proxy/mod_proxy_balancer.c
+++ b/modules/proxy/mod_proxy_balancer.c
@@ -346,23 +346,27 @@ static proxy_worker *find_best_worker(proxy_balancer *balancer,
proxy_worker *candidate = NULL;
apr_status_t rv;
+#if APR_HAS_THREADS
if ((rv = PROXY_THREAD_LOCK(balancer)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01163)
"%s: Lock failed for find_best_worker()",
balancer->s->name);
return NULL;
}
+#endif
candidate = (*balancer->lbmethod->finder)(balancer, r);
if (candidate)
candidate->s->elected++;
+#if APR_HAS_THREADS
if ((rv = PROXY_THREAD_UNLOCK(balancer)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01164)
"%s: Unlock failed for find_best_worker()",
balancer->s->name);
}
+#endif
if (candidate == NULL) {
/* All the workers are in error state or disabled.
@@ -492,11 +496,13 @@ static int proxy_balancer_pre_request(proxy_worker **worker,
/* Step 2: Lock the LoadBalancer
* XXX: perhaps we need the process lock here
*/
+#if APR_HAS_THREADS
if ((rv = PROXY_THREAD_LOCK(*balancer)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01166)
"%s: Lock failed for pre_request", (*balancer)->s->name);
return DECLINED;
}
+#endif
/* Step 3: force recovery */
force_recovery(*balancer, r->server);
@@ -557,20 +563,24 @@ static int proxy_balancer_pre_request(proxy_worker **worker,
ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(01167)
"%s: All workers are in error state for route (%s)",
(*balancer)->s->name, route);
+#if APR_HAS_THREADS
if ((rv = PROXY_THREAD_UNLOCK(*balancer)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01168)
"%s: Unlock failed for pre_request",
(*balancer)->s->name);
}
+#endif
return HTTP_SERVICE_UNAVAILABLE;
}
}
+#if APR_HAS_THREADS
if ((rv = PROXY_THREAD_UNLOCK(*balancer)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01169)
"%s: Unlock failed for pre_request",
(*balancer)->s->name);
}
+#endif
if (!*worker) {
runtime = find_best_worker(*balancer, r);
if (!runtime) {
@@ -644,12 +654,14 @@ static int proxy_balancer_post_request(proxy_worker *worker,
apr_status_t rv;
+#if APR_HAS_THREADS
if ((rv = PROXY_THREAD_LOCK(balancer)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01173)
"%s: Lock failed for post_request",
balancer->s->name);
return HTTP_INTERNAL_SERVER_ERROR;
}
+#endif
if (!apr_is_empty_array(balancer->errstatuses)
&& !(worker->s->status & PROXY_WORKER_IGNORE_ERRORS)) {
@@ -681,11 +693,12 @@ static int proxy_balancer_post_request(proxy_worker *worker,
worker->s->error_time = apr_time_now();
}
-
+#if APR_HAS_THREADS
if ((rv = PROXY_THREAD_UNLOCK(balancer)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01175)
"%s: Unlock failed for post_request", balancer->s->name);
}
+#endif
ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(01176)
"proxy_balancer_post_request for (%s)", balancer->s->name);
@@ -945,7 +958,6 @@ static int balancer_post_config(apr_pool_t *pconf, apr_pool_t *plog,
PROXY_STRNCPY(balancer->s->sname, sname); /* We know this will succeed */
balancer->max_workers = balancer->workers->nelts + balancer->growth;
-
/* Create global mutex */
rv = ap_global_mutex_create(&(balancer->gmutex), NULL, balancer_mutex_type,
balancer->s->sname, s, pconf, 0);
@@ -955,7 +967,6 @@ static int balancer_post_config(apr_pool_t *pconf, apr_pool_t *plog,
balancer->s->sname);
return HTTP_INTERNAL_SERVER_ERROR;
}
-
apr_pool_cleanup_register(pconf, (void *)s, lock_remove,
apr_pool_cleanup_null);
@@ -1135,17 +1146,21 @@ static int balancer_handler(request_rec *r)
balancer = (proxy_balancer *)conf->balancers->elts;
for (i = 0; i < conf->balancers->nelts; i++, balancer++) {
+#if APR_HAS_THREADS
if ((rv = PROXY_THREAD_LOCK(balancer)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01189)
"%s: Lock failed for balancer_handler",
balancer->s->name);
}
+#endif
ap_proxy_sync_balancer(balancer, r->server, conf);
+#if APR_HAS_THREADS
if ((rv = PROXY_THREAD_UNLOCK(balancer)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01190)
"%s: Unlock failed for balancer_handler",
balancer->s->name);
}
+#endif
}
if (r->args && (r->method_number == M_GET)) {
@@ -1359,11 +1374,13 @@ static int balancer_handler(request_rec *r)
proxy_worker *nworker;
nworker = ap_proxy_get_worker(r->pool, bsel, conf, val);
if (!nworker && storage->num_free_slots(bsel->wslot)) {
+#if APR_HAS_THREADS
if ((rv = PROXY_GLOBAL_LOCK(bsel)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01194)
"%s: Lock failed for adding worker",
bsel->s->name);
}
+#endif
ret = ap_proxy_define_worker(conf->pool, &nworker, bsel, conf, val, 0);
if (!ret) {
unsigned int index;
@@ -1372,53 +1389,76 @@ static int balancer_handler(request_rec *r)
if ((rv = storage->grab(bsel->wslot, &index)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_EMERG, rv, r, APLOGNO(01195)
"worker slotmem_grab failed");
+#if APR_HAS_THREADS
if ((rv = PROXY_GLOBAL_UNLOCK(bsel)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01196)
"%s: Unlock failed for adding worker",
bsel->s->name);
}
+#endif
return HTTP_BAD_REQUEST;
}
if ((rv = storage->dptr(bsel->wslot, index, (void *)&shm)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_EMERG, rv, r, APLOGNO(01197)
"worker slotmem_dptr failed");
+#if APR_HAS_THREADS
if ((rv = PROXY_GLOBAL_UNLOCK(bsel)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01198)
"%s: Unlock failed for adding worker",
bsel->s->name);
}
+#endif
return HTTP_BAD_REQUEST;
}
if ((rv = ap_proxy_share_worker(nworker, shm, index)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_EMERG, rv, r, APLOGNO(01199)
"Cannot share worker");
+#if APR_HAS_THREADS
if ((rv = PROXY_GLOBAL_UNLOCK(bsel)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01200)
"%s: Unlock failed for adding worker",
bsel->s->name);
}
+#endif
return HTTP_BAD_REQUEST;
}
if ((rv = ap_proxy_initialize_worker(nworker, r->server, conf->pool)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_EMERG, rv, r, APLOGNO(01201)
"Cannot init worker");
+#if APR_HAS_THREADS
if ((rv = PROXY_GLOBAL_UNLOCK(bsel)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01202)
"%s: Unlock failed for adding worker",
bsel->s->name);
}
+#endif
return HTTP_BAD_REQUEST;
}
/* sync all timestamps */
bsel->wupdated = bsel->s->wupdated = nworker->s->updated = apr_time_now();
/* by default, all new workers are disabled */
ap_proxy_set_wstatus(PROXY_WORKER_DISABLED_FLAG, 1, nworker);
+ } else {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(10163)
+ "%s: failed to add worker %s",
+ bsel->s->name, val);
+#if APR_HAS_THREADS
+ PROXY_GLOBAL_UNLOCK(bsel);
+#endif
+ return HTTP_BAD_REQUEST;
}
+#if APR_HAS_THREADS
if ((rv = PROXY_GLOBAL_UNLOCK(bsel)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(01203)
"%s: Unlock failed for adding worker",
bsel->s->name);
}
+#endif
+ } else {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(10164)
+ "%s: failed to add worker %s",
+ bsel->s->name, val);
+ return HTTP_BAD_REQUEST;
}
}
diff --git a/modules/proxy/mod_proxy_ftp.c b/modules/proxy/mod_proxy_ftp.c
index 5d9175e..5c4d641 100644
--- a/modules/proxy/mod_proxy_ftp.c
+++ b/modules/proxy/mod_proxy_ftp.c
@@ -979,8 +979,10 @@ static int proxy_ftp_handler(request_rec *r, proxy_worker *worker,
apr_status_t rv;
conn_rec *origin, *data = NULL;
apr_status_t err = APR_SUCCESS;
+#if APR_HAS_THREADS
apr_status_t uerr = APR_SUCCESS;
- apr_bucket_brigade *bb = apr_brigade_create(p, c->bucket_alloc);
+#endif
+ apr_bucket_brigade *bb;
char *buf, *connectname;
apr_port_t connectport;
char *ftpmessage = NULL;
@@ -1120,13 +1122,15 @@ static int proxy_ftp_handler(request_rec *r, proxy_worker *worker,
if (worker->s->is_address_reusable) {
if (!worker->cp->addr) {
+#if APR_HAS_THREADS
if ((err = PROXY_THREAD_LOCK(worker->balancer)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, err, r, APLOGNO(01037) "lock");
return HTTP_INTERNAL_SERVER_ERROR;
}
+#endif
}
- connect_addr = worker->cp->addr;
- address_pool = worker->cp->pool;
+ connect_addr = AP_VOLATILIZE_T(apr_sockaddr_t *, worker->cp->addr);
+ address_pool = worker->cp->dns_pool;
}
else
address_pool = r->pool;
@@ -1139,9 +1143,11 @@ static int proxy_ftp_handler(request_rec *r, proxy_worker *worker,
address_pool);
if (worker->s->is_address_reusable && !worker->cp->addr) {
worker->cp->addr = connect_addr;
+#if APR_HAS_THREADS
if ((uerr = PROXY_THREAD_UNLOCK(worker->balancer)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, uerr, r, APLOGNO(01038) "unlock");
}
+#endif
}
/*
* get all the possible IP addresses for the destname and loop through
@@ -1212,6 +1218,7 @@ static int proxy_ftp_handler(request_rec *r, proxy_worker *worker,
* correct directory...
*/
+ bb = apr_brigade_create(p, c->bucket_alloc);
/* possible results: */
/* 120 Service ready in nnn minutes. */
diff --git a/modules/proxy/proxy_util.c b/modules/proxy/proxy_util.c
index 2bfc8f0..7714b6c 100644
--- a/modules/proxy/proxy_util.c
+++ b/modules/proxy/proxy_util.c
@@ -1167,8 +1167,10 @@ PROXY_DECLARE(char *) ap_proxy_define_balancer(apr_pool_t *p,
lbmethod = ap_lookup_provider(PROXY_LBMETHOD, "byrequests", "0");
(*balancer)->workers = apr_array_make(p, 5, sizeof(proxy_worker *));
+#if APR_HAS_THREADS
(*balancer)->gmutex = NULL;
(*balancer)->tmutex = NULL;
+#endif
(*balancer)->lbmethod = lbmethod;
if (do_malloc)
@@ -1257,7 +1259,9 @@ PROXY_DECLARE(apr_status_t) ap_proxy_share_balancer(proxy_balancer *balancer,
PROXY_DECLARE(apr_status_t) ap_proxy_initialize_balancer(proxy_balancer *balancer, server_rec *s, apr_pool_t *p)
{
+#if APR_HAS_THREADS
apr_status_t rv = APR_SUCCESS;
+#endif
ap_slotmem_provider_t *storage = balancer->storage;
apr_size_t size;
unsigned int num;
@@ -1297,6 +1301,7 @@ PROXY_DECLARE(apr_status_t) ap_proxy_initialize_balancer(proxy_balancer *balance
if (balancer->lbmethod && balancer->lbmethod->reset)
balancer->lbmethod->reset(balancer, s);
+#if APR_HAS_THREADS
if (balancer->tmutex == NULL) {
rv = apr_thread_mutex_create(&(balancer->tmutex), APR_THREAD_MUTEX_DEFAULT, p);
if (rv != APR_SUCCESS) {
@@ -1305,6 +1310,7 @@ PROXY_DECLARE(apr_status_t) ap_proxy_initialize_balancer(proxy_balancer *balance
return rv;
}
}
+#endif
return APR_SUCCESS;
}
@@ -1446,16 +1452,14 @@ static void socket_cleanup(proxy_conn_rec *conn)
static apr_status_t conn_pool_cleanup(void *theworker)
{
- proxy_worker *worker = (proxy_worker *)theworker;
- if (worker->cp->res) {
- worker->cp->pool = NULL;
- }
+ ((proxy_worker *)theworker)->cp = NULL;
return APR_SUCCESS;
}
static void init_conn_pool(apr_pool_t *p, proxy_worker *worker)
{
apr_pool_t *pool;
+ apr_pool_t *dns_pool;
proxy_conn_pool *cp;
/*
@@ -1466,12 +1470,21 @@ static void init_conn_pool(apr_pool_t *p, proxy_worker *worker)
*/
apr_pool_create(&pool, p);
apr_pool_tag(pool, "proxy_worker_cp");
+ /*
+ * Create a subpool of the connection pool for worker
+ * scoped DNS resolutions. This is needed to avoid race
+ * conditions in using the connection pool by multiple
+ * threads during ramp up.
+ */
+ apr_pool_create(&dns_pool, pool);
+ apr_pool_tag(dns_pool, "proxy_worker_dns");
/*
* Alloc from the same pool as worker.
* proxy_conn_pool is permanently attached to the worker.
*/
cp = (proxy_conn_pool *)apr_pcalloc(p, sizeof(proxy_conn_pool));
cp->pool = pool;
+ cp->dns_pool = dns_pool;
worker->cp = cp;
}
@@ -1487,14 +1500,6 @@ static apr_status_t connection_cleanup(void *theconn)
proxy_conn_rec *conn = (proxy_conn_rec *)theconn;
proxy_worker *worker = conn->worker;
- /*
- * If the connection pool is NULL the worker
- * cleanup has been run. Just return.
- */
- if (!worker->cp->pool) {
- return APR_SUCCESS;
- }
-
if (conn->r) {
apr_pool_destroy(conn->r->pool);
conn->r = NULL;
@@ -1616,7 +1621,7 @@ static apr_status_t connection_destructor(void *resource, void *params,
proxy_worker *worker = params;
/* Destroy the pool only if not called from reslist_destroy */
- if (worker->cp->pool) {
+ if (worker->cp) {
proxy_conn_rec *conn = resource;
apr_pool_destroy(conn->pool);
}
@@ -1972,67 +1977,73 @@ PROXY_DECLARE(apr_status_t) ap_proxy_initialize_worker(proxy_worker *worker, ser
ap_proxy_worker_name(p, worker));
}
else {
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(00927)
- "initializing worker %s local",
- ap_proxy_worker_name(p, worker));
apr_global_mutex_lock(proxy_mutex);
- /* Now init local worker data */
- if (worker->tmutex == NULL) {
- rv = apr_thread_mutex_create(&(worker->tmutex), APR_THREAD_MUTEX_DEFAULT, p);
- if (rv != APR_SUCCESS) {
- ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(00928)
- "can not create worker thread mutex");
+ /* Check again after we got the lock if we are still uninitialized */
+ if (!(AP_VOLATILIZE_T(unsigned int, worker->local_status) & PROXY_WORKER_INITIALIZED)) {
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(00927)
+ "initializing worker %s local",
+ ap_proxy_worker_name(p, worker));
+ /* Now init local worker data */
+#if APR_HAS_THREADS
+ if (worker->tmutex == NULL) {
+ rv = apr_thread_mutex_create(&(worker->tmutex), APR_THREAD_MUTEX_DEFAULT, p);
+ if (rv != APR_SUCCESS) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(00928)
+ "can not create worker thread mutex");
+ apr_global_mutex_unlock(proxy_mutex);
+ return rv;
+ }
+ }
+#endif
+ if (worker->cp == NULL)
+ init_conn_pool(p, worker);
+ if (worker->cp == NULL) {
+ ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(00929)
+ "can not create connection pool");
apr_global_mutex_unlock(proxy_mutex);
- return rv;
+ return APR_EGENERAL;
}
- }
- if (worker->cp == NULL)
- init_conn_pool(p, worker);
- if (worker->cp == NULL) {
- ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(00929)
- "can not create connection pool");
- apr_global_mutex_unlock(proxy_mutex);
- return APR_EGENERAL;
- }
- if (worker->s->hmax) {
- rv = apr_reslist_create(&(worker->cp->res),
- worker->s->min, worker->s->smax,
- worker->s->hmax, worker->s->ttl,
- connection_constructor, connection_destructor,
- worker, worker->cp->pool);
+ if (worker->s->hmax) {
+ rv = apr_reslist_create(&(worker->cp->res),
+ worker->s->min, worker->s->smax,
+ worker->s->hmax, worker->s->ttl,
+ connection_constructor, connection_destructor,
+ worker, worker->cp->pool);
- apr_pool_cleanup_register(worker->cp->pool, (void *)worker,
- conn_pool_cleanup,
- apr_pool_cleanup_null);
+ apr_pool_pre_cleanup_register(worker->cp->pool, worker,
+ conn_pool_cleanup);
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(00930)
- "initialized pool in child %" APR_PID_T_FMT " for (%s) min=%d max=%d smax=%d",
- getpid(), worker->s->hostname_ex, worker->s->min,
- worker->s->hmax, worker->s->smax);
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(00930)
+ "initialized pool in child %" APR_PID_T_FMT " for (%s) min=%d max=%d smax=%d",
+ getpid(), worker->s->hostname_ex, worker->s->min,
+ worker->s->hmax, worker->s->smax);
- /* Set the acquire timeout */
- if (rv == APR_SUCCESS && worker->s->acquire_set) {
- apr_reslist_timeout_set(worker->cp->res, worker->s->acquire);
- }
+ /* Set the acquire timeout */
+ if (rv == APR_SUCCESS && worker->s->acquire_set) {
+ apr_reslist_timeout_set(worker->cp->res, worker->s->acquire);
+ }
- }
- else {
- void *conn;
+ }
+ else {
+ void *conn;
- rv = connection_constructor(&conn, worker, worker->cp->pool);
- worker->cp->conn = conn;
+ rv = connection_constructor(&conn, worker, worker->cp->pool);
+ worker->cp->conn = conn;
- ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(00931)
- "initialized single connection worker in child %" APR_PID_T_FMT " for (%s)",
- getpid(), worker->s->hostname_ex);
+ ap_log_error(APLOG_MARK, APLOG_DEBUG, rv, s, APLOGNO(00931)
+ "initialized single connection worker in child %" APR_PID_T_FMT " for (%s)",
+ getpid(), worker->s->hostname_ex);
+ }
+ if (rv == APR_SUCCESS) {
+ worker->local_status |= (PROXY_WORKER_INITIALIZED);
+ }
}
apr_global_mutex_unlock(proxy_mutex);
}
if (rv == APR_SUCCESS) {
worker->s->status |= (PROXY_WORKER_INITIALIZED);
- worker->local_status |= (PROXY_WORKER_INITIALIZED);
}
return rv;
}
@@ -2292,13 +2303,13 @@ PROXY_DECLARE(int) ap_proxy_acquire_connection(const char *proxy_function,
else {
/* create the new connection if the previous was destroyed */
if (!worker->cp->conn) {
- connection_constructor((void **)conn, worker, worker->cp->pool);
+ rv = connection_constructor((void **)conn, worker, worker->cp->pool);
}
else {
*conn = worker->cp->conn;
worker->cp->conn = NULL;
+ rv = APR_SUCCESS;
}
- rv = APR_SUCCESS;
}
if (rv != APR_SUCCESS) {
@@ -2344,7 +2355,9 @@ ap_proxy_determine_connection(apr_pool_t *p, request_rec *r,
{
int server_port;
apr_status_t err = APR_SUCCESS;
+#if APR_HAS_THREADS
apr_status_t uerr = APR_SUCCESS;
+#endif
const char *uds_path;
/*
@@ -2481,25 +2494,39 @@ ap_proxy_determine_connection(apr_pool_t *p, request_rec *r,
* we can reuse the address.
*/
if (!worker->cp->addr) {
+#if APR_HAS_THREADS
if ((err = PROXY_THREAD_LOCK(worker)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, err, r, APLOGNO(00945) "lock");
return HTTP_INTERNAL_SERVER_ERROR;
}
+#endif
/*
- * Worker can have the single constant backend address.
- * The single DNS lookup is used once per worker.
- * If dynamic change is needed then set the addr to NULL
- * inside dynamic config to force the lookup.
+ * Recheck addr after we got the lock. This may have changed
+ * while waiting for the lock.
*/
- err = apr_sockaddr_info_get(&(worker->cp->addr),
- conn->hostname, APR_UNSPEC,
- conn->port, 0,
- worker->cp->pool);
+ if (!AP_VOLATILIZE_T(apr_sockaddr_t *, worker->cp->addr)) {
+
+ apr_sockaddr_t *addr;
+
+ /*
+ * Worker can have the single constant backend address.
+ * The single DNS lookup is used once per worker.
+ * If dynamic change is needed then set the addr to NULL
+ * inside dynamic config to force the lookup.
+ */
+ err = apr_sockaddr_info_get(&addr,
+ conn->hostname, APR_UNSPEC,
+ conn->port, 0,
+ worker->cp->dns_pool);
+ worker->cp->addr = addr;
+ }
conn->addr = worker->cp->addr;
+#if APR_HAS_THREADS
if ((uerr = PROXY_THREAD_UNLOCK(worker)) != APR_SUCCESS) {
ap_log_rerror(APLOG_MARK, APLOG_ERR, uerr, r, APLOGNO(00946) "unlock");
}
+#endif
}
else {
conn->addr = worker->cp->addr;
@@ -3422,7 +3449,9 @@ PROXY_DECLARE(apr_status_t) ap_proxy_sync_balancer(proxy_balancer *b, server_rec
(*runtime)->cp = NULL;
(*runtime)->balancer = b;
(*runtime)->s = shm;
+#if APR_HAS_THREADS
(*runtime)->tmutex = NULL;
+#endif
rv = ap_proxy_initialize_worker(*runtime, s, conf->pool);
if (rv != APR_SUCCESS) {
ap_log_error(APLOG_MARK, APLOG_EMERG, rv, s, APLOGNO(00966) "Cannot init worker");