conn_rec *h2_slave_create(conn_rec *master, int slave_id, apr_pool_t *parent)
{
apr_allocator_t *allocator;
apr_status_t status;
apr_pool_t *pool;
conn_rec *c;
void *cfg;
module *mpm;
ap_assert(master);
ap_log_cerror(APLOG_MARK, APLOG_TRACE3, 0, master,
"h2_stream(%ld-%d): create slave", master->id, slave_id);
/* We create a pool with its own allocator to be used for
* processing a request. This is the only way to have the processing
* independant of its parent pool in the sense that it can work in
* another thread. Also, the new allocator needs its own mutex to
* synchronize sub-pools.
*/
apr_allocator_create(&allocator);
apr_allocator_max_free_set(allocator, ap_max_mem_free);
status = apr_pool_create_ex(&pool, parent, NULL, allocator);
if (status != APR_SUCCESS) {
ap_log_cerror(APLOG_MARK, APLOG_ERR, status, master,
APLOGNO(10004) "h2_session(%ld-%d): create slave pool",
master->id, slave_id);
return NULL;
}
apr_allocator_owner_set(allocator, pool);
apr_pool_abort_set(abort_on_oom, pool);
apr_pool_tag(pool, "h2_slave_conn");
c = (conn_rec *) apr_palloc(pool, sizeof(conn_rec));
if (c == NULL) {
ap_log_cerror(APLOG_MARK, APLOG_ERR, APR_ENOMEM, master,
APLOGNO(02913) "h2_session(%ld-%d): create slave",
master->id, slave_id);
apr_pool_destroy(pool);
return NULL;
}
memcpy(c, master, sizeof(conn_rec));
c->master = master;
c->pool = pool;
c->conn_config = ap_create_conn_config(pool);
c->notes = apr_table_make(pool, 5);
c->input_filters = NULL;
c->output_filters = NULL;
c->keepalives = 0;
#if AP_MODULE_MAGIC_AT_LEAST(20180903, 1)
c->filter_conn_ctx = NULL;
#endif
c->bucket_alloc = apr_bucket_alloc_create(pool);
#if !AP_MODULE_MAGIC_AT_LEAST(20180720, 1)
c->data_in_input_filters = 0;
c->data_in_output_filters = 0;
#endif
/* prevent mpm_event from making wrong assumptions about this connection,
* like e.g. using its socket for an async read check. */
c->clogging_input_filters = 1;
c->log = NULL;
c->log_id = apr_psprintf(pool, "%ld-%d",
master->id, slave_id);
c->aborted = 0;
/* We cannot install the master connection socket on the slaves, as
* modules mess with timeouts/blocking of the socket, with
* unwanted side effects to the master connection processing.
* Fortunately, since we never use the slave socket, we can just install
* a single, process-wide dummy and everyone is happy.
*/
ap_set_module_config(c->conn_config, &core_module, dummy_socket);
/* TODO: these should be unique to this thread */
c->sbh = master->sbh;
/* TODO: not all mpm modules have learned about slave connections yet.
* copy their config from master to slave.
*/
if ((mpm = h2_conn_mpm_module()) != NULL) {
cfg = ap_get_module_config(master->conn_config, mpm);
ap_set_module_config(c->conn_config, mpm, cfg);
}
ap_log_cerror(APLOG_MARK, APLOG_TRACE3, 0, c,
"h2_slave(%s): created", c->log_id);
return c;
}
conn_rec *h2_slave_create(conn_rec *master, apr_pool_t *p,
apr_thread_t *thread, apr_socket_t *socket)
{
conn_rec *c;
AP_DEBUG_ASSERT(master);
ap_log_cerror(APLOG_MARK, APLOG_TRACE3, 0, master,
"h2_conn(%ld): created from master", master->id);
/* This is like the slave connection creation from 2.5-DEV. A
* very efficient way - not sure how compatible this is, since
* the core hooks are no longer run.
* But maybe it's is better this way, not sure yet.
*/
c = (conn_rec *) apr_palloc(p, sizeof(conn_rec));
if (c == NULL) {
ap_log_cerror(APLOG_MARK, APLOG_ERR, APR_ENOMEM, master,
APLOGNO(02913) "h2_task: creating conn");
return NULL;
}
memcpy(c, master, sizeof(conn_rec));
/* Replace these */
c->id = (master->id & (long)p);
c->master = master;
c->pool = p;
c->current_thread = thread;
c->conn_config = ap_create_conn_config(p);
c->notes = apr_table_make(p, 5);
c->input_filters = NULL;
c->output_filters = NULL;
c->bucket_alloc = apr_bucket_alloc_create(p);
c->cs = NULL;
c->data_in_input_filters = 0;
c->data_in_output_filters = 0;
c->clogging_input_filters = 1;
c->log = NULL;
c->log_id = NULL;
/* TODO: these should be unique to this thread */
c->sbh = master->sbh;
/* Simulate that we had already a request on this connection. */
c->keepalives = 1;
ap_set_module_config(c->conn_config, &core_module, socket);
/* This works for mpm_worker so far. Other mpm modules have
* different needs, unfortunately. The most interesting one
* being mpm_event...
*/
switch (h2_conn_mpm_type()) {
case H2_MPM_WORKER:
/* all fine */
break;
case H2_MPM_EVENT:
fix_event_conn(c, master);
break;
default:
/* fingers crossed */
break;
}
return c;
}
