diff -upr modules/http2/h2_bucket_beam.c modules/http2/h2_bucket_beam.c
--- a/modules/http2/h2_bucket_beam.c	2018-02-10 16:46:12.000000000 +0100
+++ b/modules/http2/h2_bucket_beam.c	2018-05-30 21:13:36.000000000 +0200
@@ -550,6 +550,7 @@ static void recv_buffer_cleanup(h2_bucke
         apr_brigade_destroy(bb);
         if (bl) enter_yellow(beam, bl);
         
+        apr_thread_cond_broadcast(beam->change);
         if (beam->cons_ev_cb) { 
             beam->cons_ev_cb(beam->cons_ctx, beam);
         }
@@ -707,12 +708,10 @@ void h2_beam_abort(h2_bucket_beam *beam)
     h2_beam_lock bl;
     
     if (beam && enter_yellow(beam, &bl) == APR_SUCCESS) {
-        if (!beam->aborted) {
-            beam->aborted = 1;
-            r_purge_sent(beam);
-            h2_blist_cleanup(&beam->send_list);
-            report_consumption(beam, &bl);
-        }
+        beam->aborted = 1;
+        r_purge_sent(beam);
+        h2_blist_cleanup(&beam->send_list);
+        report_consumption(beam, &bl);
         apr_thread_cond_broadcast(beam->change);
         leave_yellow(beam, &bl);
     }
@@ -924,6 +923,7 @@ apr_status_t h2_beam_send(h2_bucket_beam
             while (!APR_BRIGADE_EMPTY(sender_bb) && APR_SUCCESS == rv) {
                 if (space_left <= 0) {
                     report_prod_io(beam, force_report, &bl);
+                    r_purge_sent(beam);
                     rv = wait_not_full(beam, block, &space_left, &bl);
                     if (APR_SUCCESS != rv) {
                         break;
diff -upr modules/http2/h2_config.c modules/http2/h2_config.c
--- a/modules/http2/h2_config.c	2018-02-10 16:46:12.000000000 +0100
+++ b/modules/http2/h2_config.c	2018-05-29 23:06:49.000000000 +0200
@@ -604,6 +604,30 @@ static const char *h2_conf_set_early_hin
     return "value must be On or Off";
 }
 
+void h2_get_num_workers(server_rec *s, int *minw, int *maxw)
+{
+    int threads_per_child = 0;
+    const h2_config *config = h2_config_sget(s);
+
+    *minw = h2_config_geti(config, H2_CONF_MIN_WORKERS);
+    *maxw = h2_config_geti(config, H2_CONF_MAX_WORKERS);    
+    ap_mpm_query(AP_MPMQ_MAX_THREADS, &threads_per_child);
+
+    if (*minw <= 0) {
+        *minw = threads_per_child;
+    }
+    if (*maxw <= 0) {
+        /* As a default, this seems to work quite well under mpm_event. 
+         * For people enabling http2 under mpm_prefork, start 4 threads unless 
+         * configured otherwise. People get unhappy if their http2 requests are 
+         * blocking each other. */
+        *maxw = 3 * (*minw) / 2;
+        if (*maxw < 4) {
+            *maxw = 4;
+        }
+    }
+}
+
 #define AP_END_CMD     AP_INIT_TAKE1(NULL, NULL, NULL, RSRC_CONF, NULL)
 
 const command_rec h2_cmds[] = {
diff -upr modules/http2/h2_config.h modules/http2/h2_config.h
--- a/modules/http2/h2_config.h	2018-02-10 16:46:12.000000000 +0100
+++ b/modules/http2/h2_config.h	2018-05-29 23:06:49.000000000 +0200
@@ -95,6 +95,8 @@ const h2_config *h2_config_rget(request_
 int h2_config_geti(const h2_config *conf, h2_config_var_t var);
 apr_int64_t h2_config_geti64(const h2_config *conf, h2_config_var_t var);
 
+void h2_get_num_workers(server_rec *s, int *minw, int *maxw);
+
 void h2_config_init(apr_pool_t *pool);
 
 const struct h2_priority *h2_config_get_priority(const h2_config *conf, 
diff -upr modules/http2/h2_conn.c modules/http2/h2_conn.c
--- a/modules/http2/h2_conn.c	2018-02-10 16:46:12.000000000 +0100
+++ b/modules/http2/h2_conn.c	2018-05-30 21:13:36.000000000 +0200
@@ -127,18 +127,7 @@ apr_status_t h2_conn_child_init(apr_pool
 
     h2_config_init(pool);
     
-    minw = h2_config_geti(config, H2_CONF_MIN_WORKERS);
-    maxw = h2_config_geti(config, H2_CONF_MAX_WORKERS);    
-    if (minw <= 0) {
-        minw = max_threads_per_child;
-    }
-    if (maxw <= 0) {
-        /* As a default, this seems to work quite well under mpm_event. 
-         * For people enabling http2 under mpm_prefork, start 4 threads unless 
-         * configured otherwise. People get unhappy if their http2 requests are 
-         * blocking each other. */
-        maxw = H2MAX(3 * minw / 2, 4);
-    }
+    h2_get_num_workers(s, &minw, &maxw);
     
     idle_secs = h2_config_geti(config, H2_CONF_MAX_WORKER_IDLE_SECS);
     ap_log_error(APLOG_MARK, APLOG_TRACE3, 0, s,
@@ -240,7 +229,19 @@ apr_status_t h2_conn_run(struct h2_ctx *
              && mpm_state != AP_MPMQ_STOPPING);
 
     if (c->cs) {
-        c->cs->state = CONN_STATE_LINGER;
+        switch (session->state) {
+            case H2_SESSION_ST_INIT:
+            case H2_SESSION_ST_IDLE:
+            case H2_SESSION_ST_BUSY:
+            case H2_SESSION_ST_WAIT:
+                c->cs->state = CONN_STATE_WRITE_COMPLETION;
+                break;
+            case H2_SESSION_ST_CLEANUP:
+            case H2_SESSION_ST_DONE:
+            default:
+                c->cs->state = CONN_STATE_LINGER;
+            break;
+        }
     }
 
     return APR_SUCCESS;
@@ -313,8 +314,6 @@ conn_rec *h2_slave_create(conn_rec *mast
     c->log                    = NULL;
     c->log_id                 = apr_psprintf(pool, "%ld-%d", 
                                              master->id, slave_id);
-    /* Simulate that we had already a request on this connection. */
-    c->keepalives             = 1;
     c->aborted                = 0;
     /* We cannot install the master connection socket on the slaves, as
      * modules mess with timeouts/blocking of the socket, with
@@ -349,6 +348,14 @@ void h2_slave_destroy(conn_rec *slave)
 
 apr_status_t h2_slave_run_pre_connection(conn_rec *slave, apr_socket_t *csd)
 {
-    return ap_run_pre_connection(slave, csd);
+    if (slave->keepalives == 0) {
+        /* Simulate that we had already a request on this connection. Some
+         * hooks trigger special behaviour when keepalives is 0. 
+         * (Not necessarily in pre_connection, but later. Set it here, so it
+         * is in place.) */
+        slave->keepalives = 1;
+        return ap_run_pre_connection(slave, csd);
+    }
+    return APR_SUCCESS;
 }
 
diff -upr modules/http2/h2_filter.c modules/http2/h2_filter.c
--- a/modules/http2/h2_filter.c	2018-02-10 16:46:12.000000000 +0100
+++ b/modules/http2/h2_filter.c	2018-05-29 23:16:29.000000000 +0200
@@ -291,6 +291,8 @@ apr_bucket *h2_bucket_observer_beam(stru
 }
 
 static apr_status_t bbout(apr_bucket_brigade *bb, const char *fmt, ...)
+                             __attribute__((format(printf,2,3)));
+static apr_status_t bbout(apr_bucket_brigade *bb, const char *fmt, ...)
 {
     va_list args;
     apr_status_t rv;
@@ -351,8 +353,8 @@ static int add_stream(h2_stream *stream,
     bbout(x->bb, "    \"created\": %f,\n", ((double)stream->created)/APR_USEC_PER_SEC);
     bbout(x->bb, "    \"flowIn\": %d,\n", flowIn);
     bbout(x->bb, "    \"flowOut\": %d,\n", flowOut);
-    bbout(x->bb, "    \"dataIn\": %"APR_UINT64_T_FMT",\n", stream->in_data_octets);  
-    bbout(x->bb, "    \"dataOut\": %"APR_UINT64_T_FMT"\n", stream->out_data_octets);  
+    bbout(x->bb, "    \"dataIn\": %"APR_OFF_T_FMT",\n", stream->in_data_octets);  
+    bbout(x->bb, "    \"dataOut\": %"APR_OFF_T_FMT"\n", stream->out_data_octets);  
     bbout(x->bb, "    }");
     
     ++x->idx;
diff -upr modules/http2/h2_from_h1.c modules/http2/h2_from_h1.c
--- a/modules/http2/h2_from_h1.c	2018-02-10 16:46:12.000000000 +0100
+++ b/modules/http2/h2_from_h1.c	2018-05-29 23:16:29.000000000 +0200
@@ -413,7 +413,7 @@ static apr_status_t pass_response(h2_tas
     
     h2_headers *response = h2_headers_create(parser->http_status, 
                                              make_table(parser),
-                                             NULL, task->pool);
+                                             NULL, 0, task->pool);
     apr_brigade_cleanup(parser->tmp);
     b = h2_bucket_headers_create(task->c->bucket_alloc, response);
     APR_BRIGADE_INSERT_TAIL(parser->tmp, b);
@@ -772,6 +772,10 @@ apr_status_t h2_filter_request_in(ap_fil
                 APR_BUCKET_REMOVE(b);
                 apr_bucket_destroy(b);
                 ap_remove_input_filter(f);
+                
+                if (headers->raw_bytes && h2_task_logio_add_bytes_in) {
+                    h2_task_logio_add_bytes_in(task->c, headers->raw_bytes);
+                }
                 break;
             }
         }
diff -upr modules/http2/h2.h modules/http2/h2.h
--- a/modules/http2/h2.h	2018-02-10 16:46:12.000000000 +0100
+++ b/modules/http2/h2.h	2018-05-29 23:16:29.000000000 +0200
@@ -51,6 +51,9 @@ extern const char *H2_MAGIC_TOKEN;
 /* Max data size to write so it fits inside a TLS record */
 #define H2_DATA_CHUNK_SIZE          ((16*1024) - 100 - 9) 
 
+/* Size of the frame header itself in HTTP/2 */
+#define H2_FRAME_HDR_LEN            9
+ 
 /* Maximum number of padding bytes in a frame, rfc7540 */
 #define H2_MAX_PADLEN               256
 /* Initial default window size, RFC 7540 ch. 6.5.2 */
@@ -137,6 +140,7 @@ struct h2_request {
     apr_time_t request_time;
     unsigned int chunked : 1;   /* iff requst body needs to be forwarded as chunked */
     unsigned int serialize : 1; /* iff this request is written in HTTP/1.1 serialization */
+    apr_off_t raw_bytes;        /* RAW network bytes that generated this request - if known. */
 };
 
 typedef struct h2_headers h2_headers;
@@ -145,6 +149,7 @@ struct h2_headers {
     int         status;
     apr_table_t *headers;
     apr_table_t *notes;
+    apr_off_t   raw_bytes;      /* RAW network bytes that generated this request - if known. */
 };
 
 typedef apr_status_t h2_io_data_cb(void *ctx, const char *data, apr_off_t len);
diff -upr modules/http2/h2_h2.c modules/http2/h2_h2.c
--- a/modules/http2/h2_h2.c	2018-02-14 00:43:36.000000000 +0100
+++ b/modules/http2/h2_h2.c	2018-05-29 23:16:29.000000000 +0200
@@ -635,10 +635,10 @@ int h2_h2_process_conn(conn_rec* c)
                 }
                 h2_ctx_protocol_set(ctx, h2_h2_is_tls(c)? "h2" : "h2c");
             }
-            else {
+            else if (APLOGctrace2(c)) {
                 ap_log_cerror(APLOG_MARK, APLOG_TRACE2, 0, c,
-                              "h2_h2, not detected in %d bytes: %s", 
-                              (int)slen, s);
+                              "h2_h2, not detected in %d bytes(base64): %s", 
+                              (int)slen, h2_util_base64url_encode(s, slen, c->pool));
             }
             
             apr_brigade_destroy(temp);
diff -upr modules/http2/h2_headers.c modules/http2/h2_headers.c
--- a/modules/http2/h2_headers.c	2018-02-10 16:46:12.000000000 +0100
+++ b/modules/http2/h2_headers.c	2018-05-29 23:16:29.000000000 +0200
@@ -111,7 +111,8 @@ apr_bucket *h2_bucket_headers_beam(struc
 
 
 h2_headers *h2_headers_create(int status, apr_table_t *headers_in, 
-                                apr_table_t *notes, apr_pool_t *pool)
+                                apr_table_t *notes, apr_off_t raw_bytes,
+                                apr_pool_t *pool)
 {
     h2_headers *headers = apr_pcalloc(pool, sizeof(h2_headers));
     headers->status    = status;
@@ -125,7 +126,7 @@ h2_headers *h2_headers_create(int status
 h2_headers *h2_headers_rcreate(request_rec *r, int status,
                                  apr_table_t *header, apr_pool_t *pool)
 {
-    h2_headers *headers = h2_headers_create(status, header, r->notes, pool);
+    h2_headers *headers = h2_headers_create(status, header, r->notes, 0, pool);
     if (headers->status == HTTP_FORBIDDEN) {
         const char *cause = apr_table_get(r->notes, "ssl-renegotiate-forbidden");
         if (cause) {
@@ -149,7 +150,7 @@ h2_headers *h2_headers_rcreate(request_r
 h2_headers *h2_headers_copy(apr_pool_t *pool, h2_headers *h)
 {
     return h2_headers_create(h->status, apr_table_copy(pool, h->headers), 
-                             apr_table_copy(pool, h->notes), pool);
+                             apr_table_copy(pool, h->notes), h->raw_bytes, pool);
 }
 
 h2_headers *h2_headers_die(apr_status_t type,
diff -upr modules/http2/h2_headers.h modules/http2/h2_headers.h
--- a/modules/http2/h2_headers.h	2018-02-10 16:46:12.000000000 +0100
+++ b/modules/http2/h2_headers.h	2018-05-29 23:16:29.000000000 +0200
@@ -41,10 +41,12 @@ apr_bucket *h2_bucket_headers_beam(struc
  * @param status the headers status
  * @param header the headers of the headers
  * @param notes  the notes carried by the headers
+ * @param raw_bytes the raw network bytes (if known) used to transmit these
  * @param pool the memory pool to use
  */
 h2_headers *h2_headers_create(int status, apr_table_t *header, 
-                              apr_table_t *notes, apr_pool_t *pool);
+                              apr_table_t *notes, apr_off_t raw_bytes, 
+                              apr_pool_t *pool);
 
 /**
  * Create the headers from the given request_rec.
diff -upr modules/http2/h2_mplx.c modules/http2/h2_mplx.c
--- a/modules/http2/h2_mplx.c	2018-02-10 16:46:12.000000000 +0100
+++ b/modules/http2/h2_mplx.c	2018-05-29 23:16:29.000000000 +0200
@@ -286,34 +286,6 @@ static int output_consumed_signal(h2_mpl
     return 0;
 }
 
-static void task_destroy(h2_mplx *m, h2_task *task)
-{
-    conn_rec *slave = NULL;
-    int reuse_slave = 0;
-    
-    slave = task->c;
-
-    if (m->s->keep_alive_max == 0 || slave->keepalives < m->s->keep_alive_max) {
-        reuse_slave = ((m->spare_slaves->nelts < (m->limit_active * 3 / 2))
-                       && !task->rst_error);
-    }
-    
-    if (slave) {
-        if (reuse_slave && slave->keepalive == AP_CONN_KEEPALIVE) {
-            h2_beam_log(task->output.beam, m->c, APLOG_DEBUG, 
-                        APLOGNO(03385) "h2_task_destroy, reuse slave");    
-            h2_task_destroy(task);
-            APR_ARRAY_PUSH(m->spare_slaves, conn_rec*) = slave;
-        }
-        else {
-            h2_beam_log(task->output.beam, m->c, APLOG_TRACE1, 
-                        "h2_task_destroy, destroy slave");    
-            slave->sbh = NULL;
-            h2_slave_destroy(slave);
-        }
-    }
-}
-
 static int stream_destroy_iter(void *ctx, void *val) 
 {   
     h2_mplx *m = ctx;
@@ -331,8 +303,42 @@ static int stream_destroy_iter(void *ctx
     }
 
     if (stream->task) {
-        task_destroy(m, stream->task);
+        h2_task *task = stream->task;
+        conn_rec *slave;
+        int reuse_slave = 0;
+        
         stream->task = NULL;
+        slave = task->c;
+        if (slave) {
+            /* On non-serialized requests, the IO logging has not accounted for any
+             * meta data send over the network: response headers and h2 frame headers. we
+             * counted this on the stream and need to add this now.
+             * This is supposed to happen before the EOR bucket triggers the
+             * logging of the transaction. *fingers crossed* */
+            if (task->request && !task->request->serialize && h2_task_logio_add_bytes_out) {
+                apr_off_t unaccounted = stream->out_frame_octets - stream->out_data_octets;
+                if (unaccounted > 0) {
+                    h2_task_logio_add_bytes_out(slave, unaccounted);
+                }
+            }
+        
+            if (m->s->keep_alive_max == 0 || slave->keepalives < m->s->keep_alive_max) {
+                reuse_slave = ((m->spare_slaves->nelts < (m->limit_active * 3 / 2))
+                               && !task->rst_error);
+            }
+            
+            if (reuse_slave && slave->keepalive == AP_CONN_KEEPALIVE) {
+                h2_beam_log(task->output.beam, m->c, APLOG_DEBUG, 
+                            APLOGNO(03385) "h2_task_destroy, reuse slave");    
+                h2_task_destroy(task);
+                APR_ARRAY_PUSH(m->spare_slaves, conn_rec*) = slave;
+            }
+            else {
+                h2_beam_log(task->output.beam, m->c, APLOG_TRACE1, 
+                            "h2_task_destroy, destroy slave");    
+                h2_slave_destroy(slave);
+            }
+        }
     }
     h2_stream_destroy(stream);
     return 0;
diff -upr modules/http2/h2_proxy_util.c modules/http2/h2_proxy_util.c
--- a/modules/http2/h2_proxy_util.c	2018-02-10 16:46:12.000000000 +0100
+++ b/modules/http2/h2_proxy_util.c	2018-06-14 23:44:06.000000000 +0200
@@ -916,8 +916,8 @@ static size_t subst_str(link_ctx *ctx, i
     delta = nlen - olen;
     plen = ctx->slen + delta + 1;
     p = apr_pcalloc(ctx->pool, plen);
-    strncpy(p, ctx->s, start);
-    strncpy(p + start, ns, nlen);
+    memcpy(p, ctx->s, start);
+    memcpy(p + start, ns, nlen);
     strcpy(p + start + nlen, ctx->s + end);
     ctx->s = p;
     ctx->slen = (int)strlen(p);
@@ -943,7 +943,7 @@ static void map_link(link_ctx *ctx)
             /* common to use relative uris in link header, for mappings
              * to work need to prefix the backend server uri */
             need_len += ctx->psu_len;
-            strncpy(buffer, ctx->p_server_uri, sizeof(buffer));
+            apr_cpystrn(buffer, ctx->p_server_uri, sizeof(buffer));
             buffer_len = ctx->psu_len;
         }
         if (need_len > sizeof(buffer)) {
@@ -951,9 +951,7 @@ static void map_link(link_ctx *ctx)
                           "link_reverse_map uri too long, skipped: %s", ctx->s);
             return;
         }
-        strncpy(buffer + buffer_len, ctx->s + ctx->link_start, link_len);
-        buffer_len += link_len;
-        buffer[buffer_len] = '\0';
+        apr_cpystrn(buffer + buffer_len, ctx->s + ctx->link_start, link_len + 1);
         if (!prepend_p_server
             && strcmp(ctx->real_backend_uri, ctx->p_server_uri)
             && !strncmp(buffer, ctx->real_backend_uri, ctx->rbu_len)) {
@@ -961,8 +959,8 @@ static void map_link(link_ctx *ctx)
              * to work, we need to use the proxy uri */
             int path_start = ctx->link_start + ctx->rbu_len;
             link_len -= ctx->rbu_len;
-            strcpy(buffer, ctx->p_server_uri);
-            strncpy(buffer + ctx->psu_len, ctx->s + path_start, link_len);
+            memcpy(buffer, ctx->p_server_uri, ctx->psu_len);
+            memcpy(buffer + ctx->psu_len, ctx->s + path_start, link_len);
             buffer_len = ctx->psu_len + link_len;
             buffer[buffer_len] = '\0';            
         }
diff -upr modules/http2/h2_push.c modules/http2/h2_push.c
--- a/modules/http2/h2_push.c	2018-02-10 16:46:12.000000000 +0100
+++ b/modules/http2/h2_push.c	2018-05-29 23:16:29.000000000 +0200
@@ -352,7 +352,7 @@ static int add_push(link_ctx *ctx)
                                     ctx->req->authority, path, headers,
                                     ctx->req->serialize);
                 /* atm, we do not push on pushes */
-                h2_request_end_headers(req, ctx->pool, 1);
+                h2_request_end_headers(req, ctx->pool, 1, 0);
                 push->req = req;
                 if (has_param(ctx, "critical")) {
                     h2_priority *prio = apr_pcalloc(ctx->pool, sizeof(*prio));
diff -upr modules/http2/h2_request.c modules/http2/h2_request.c
--- a/modules/http2/h2_request.c	2018-02-10 16:46:12.000000000 +0100
+++ b/modules/http2/h2_request.c	2018-05-29 23:16:29.000000000 +0200
@@ -150,7 +150,7 @@ apr_status_t h2_request_add_header(h2_re
     return status;
 }
 
-apr_status_t h2_request_end_headers(h2_request *req, apr_pool_t *pool, int eos)
+apr_status_t h2_request_end_headers(h2_request *req, apr_pool_t *pool, int eos, size_t raw_bytes)
 {
     const char *s;
     
@@ -190,7 +190,8 @@ apr_status_t h2_request_end_headers(h2_r
             apr_table_setn(req->headers, "Content-Length", "0");
         }
     }
-
+    req->raw_bytes += raw_bytes;
+    
     return APR_SUCCESS;
 }
 
diff -upr modules/http2/h2_request.h modules/http2/h2_request.h
--- a/modules/http2/h2_request.h	2018-02-10 16:46:12.000000000 +0100
+++ b/modules/http2/h2_request.h	2018-05-29 23:16:29.000000000 +0200
@@ -30,7 +30,7 @@ apr_status_t h2_request_add_trailer(h2_r
                                     const char *name, size_t nlen,
                                     const char *value, size_t vlen);
 
-apr_status_t h2_request_end_headers(h2_request *req, apr_pool_t *pool, int eos);
+apr_status_t h2_request_end_headers(h2_request *req, apr_pool_t *pool, int eos, size_t raw_bytes);
 
 h2_request *h2_request_clone(apr_pool_t *p, const h2_request *src);
 
diff -upr modules/http2/h2_session.c modules/http2/h2_session.c
--- a/modules/http2/h2_session.c	2018-02-10 16:46:12.000000000 +0100
+++ b/modules/http2/h2_session.c	2018-05-29 23:16:29.000000000 +0200
@@ -348,7 +348,8 @@ static int on_frame_recv_cb(nghttp2_sess
              * trailers */
             stream = h2_session_stream_get(session, frame->hd.stream_id);
             if (stream) {
-                rv = h2_stream_recv_frame(stream, NGHTTP2_HEADERS, frame->hd.flags);
+                rv = h2_stream_recv_frame(stream, NGHTTP2_HEADERS, frame->hd.flags, 
+                    frame->hd.length + H2_FRAME_HDR_LEN);
             }
             break;
         case NGHTTP2_DATA:
@@ -358,7 +359,8 @@ static int on_frame_recv_cb(nghttp2_sess
                               H2_STRM_LOG(APLOGNO(02923), stream, 
                               "DATA, len=%ld, flags=%d"), 
                               (long)frame->hd.length, frame->hd.flags);
-                rv = h2_stream_recv_frame(stream, NGHTTP2_DATA, frame->hd.flags);
+                rv = h2_stream_recv_frame(stream, NGHTTP2_DATA, frame->hd.flags, 
+                    frame->hd.length + H2_FRAME_HDR_LEN);
             }
             break;
         case NGHTTP2_PRIORITY:
@@ -546,7 +548,8 @@ static int on_frame_send_cb(nghttp2_sess
     
     stream = h2_session_stream_get(session, stream_id);
     if (stream) {
-        h2_stream_send_frame(stream, frame->hd.type, frame->hd.flags);
+        h2_stream_send_frame(stream, frame->hd.type, frame->hd.flags, 
+            frame->hd.length + H2_FRAME_HDR_LEN);
     }
     return 0;
 }
diff -upr modules/http2/h2_stream.c modules/http2/h2_stream.c
--- a/modules/http2/h2_stream.c	2018-02-10 16:46:12.000000000 +0100
+++ b/modules/http2/h2_stream.c	2018-05-29 23:16:29.000000000 +0200
@@ -221,7 +221,8 @@ static apr_status_t close_input(h2_strea
             stream->in_buffer = apr_brigade_create(stream->pool, c->bucket_alloc);
         }
         
-        r = h2_headers_create(HTTP_OK, stream->trailers, NULL, stream->pool);
+        r = h2_headers_create(HTTP_OK, stream->trailers, NULL, 
+            stream->in_trailer_octets, stream->pool);
         stream->trailers = NULL;        
         b = h2_bucket_headers_create(c->bucket_alloc, r);
         APR_BRIGADE_INSERT_TAIL(stream->in_buffer, b);
@@ -369,7 +370,7 @@ static void set_policy_for(h2_stream *st
     r->serialize = h2_config_geti(stream->session->config, H2_CONF_SER_HEADERS);
 }
 
-apr_status_t h2_stream_send_frame(h2_stream *stream, int ftype, int flags)
+apr_status_t h2_stream_send_frame(h2_stream *stream, int ftype, int flags, size_t frame_len)
 {
     apr_status_t status = APR_SUCCESS;
     int new_state, eos = 0;
@@ -381,7 +382,9 @@ apr_status_t h2_stream_send_frame(h2_str
         AP_DEBUG_ASSERT(new_state > S_XXX);
         return transit(stream, new_state);
     }
-    
+
+    ++stream->out_frames;
+    stream->out_frame_octets += frame_len;
     switch (ftype) {
         case NGHTTP2_DATA:
             eos = (flags & NGHTTP2_FLAG_END_STREAM);
@@ -395,7 +398,7 @@ apr_status_t h2_stream_send_frame(h2_str
                 /* start pushed stream */
                 ap_assert(stream->request == NULL);
                 ap_assert(stream->rtmp != NULL);
-                status = h2_request_end_headers(stream->rtmp, stream->pool, 1);
+                status = h2_request_end_headers(stream->rtmp, stream->pool, 1, 0);
                 if (status != APR_SUCCESS) {
                     return status;
                 }
@@ -416,7 +419,7 @@ apr_status_t h2_stream_send_frame(h2_str
     return status;
 }
 
-apr_status_t h2_stream_recv_frame(h2_stream *stream, int ftype, int flags)
+apr_status_t h2_stream_recv_frame(h2_stream *stream, int ftype, int flags, size_t frame_len)
 {
     apr_status_t status = APR_SUCCESS;
     int new_state, eos = 0;
@@ -441,6 +444,7 @@ apr_status_t h2_stream_recv_frame(h2_str
                 if (!eos) {
                     h2_stream_rst(stream, H2_ERR_PROTOCOL_ERROR);
                 }
+                stream->in_trailer_octets += frame_len;
             }
             else {
                 /* request HEADER */
@@ -452,7 +456,7 @@ apr_status_t h2_stream_recv_frame(h2_str
                      * to abort the connection here, since this is clearly a protocol error */
                     return APR_EINVAL;
                 }
-                status = h2_request_end_headers(stream->rtmp, stream->pool, eos);
+                status = h2_request_end_headers(stream->rtmp, stream->pool, eos, frame_len);
                 if (status != APR_SUCCESS) {
                     return status;
                 }
@@ -629,7 +633,7 @@ apr_status_t h2_stream_set_request_rec(h
         stream->rtmp = req;
         /* simulate the frames that led to this */
         return h2_stream_recv_frame(stream, NGHTTP2_HEADERS, 
-                                    NGHTTP2_FLAG_END_STREAM);
+                                    NGHTTP2_FLAG_END_STREAM, 0);
     }
     return status;
 }
diff -upr modules/http2/h2_stream.h modules/http2/h2_stream.h
--- a/modules/http2/h2_stream.h	2018-02-10 16:46:12.000000000 +0100
+++ b/modules/http2/h2_stream.h	2018-05-29 23:16:29.000000000 +0200
@@ -96,10 +96,13 @@ struct h2_stream {
     struct h2_task *task;       /* assigned task to fullfill request */
     
     const h2_priority *pref_priority; /* preferred priority for this stream */
+    apr_off_t out_frames;       /* # of frames sent out */
+    apr_off_t out_frame_octets; /* # of RAW frame octets sent out */
     apr_off_t out_data_frames;  /* # of DATA frames sent */
     apr_off_t out_data_octets;  /* # of DATA octets (payload) sent */
     apr_off_t in_data_frames;   /* # of DATA frames received */
     apr_off_t in_data_octets;   /* # of DATA octets (payload) received */
+    apr_off_t in_trailer_octets; /* # of HEADER octets (payload) received in trailers */
     
     h2_stream_monitor *monitor; /* optional monitor for stream states */
 };
@@ -196,8 +199,8 @@ apr_status_t h2_stream_add_header(h2_str
                                   const char *name, size_t nlen,
                                   const char *value, size_t vlen);
 
-apr_status_t h2_stream_send_frame(h2_stream *stream, int frame_type, int flags);
-apr_status_t h2_stream_recv_frame(h2_stream *stream, int frame_type, int flags);
+apr_status_t h2_stream_send_frame(h2_stream *stream, int frame_type, int flags, size_t frame_len);
+apr_status_t h2_stream_recv_frame(h2_stream *stream, int frame_type, int flags, size_t frame_len);
 
 /*
  * Process a frame of received DATA.
diff -upr modules/http2/h2_task.c modules/http2/h2_task.c
--- a/modules/http2/h2_task.c	2018-02-10 16:46:12.000000000 +0100
+++ b/modules/http2/h2_task.c	2018-05-29 23:16:29.000000000 +0200
@@ -675,7 +675,14 @@ static apr_status_t h2_task_process_requ
         ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c,
                       "h2_task(%s): start process_request", task->id);
     
+        /* Add the raw bytes of the request (e.g. header frame lengths to
+         * the logio for this request. */
+        if (req->raw_bytes && h2_task_logio_add_bytes_in) {
+            h2_task_logio_add_bytes_in(c, req->raw_bytes);
+        }
+        
         ap_process_request(r);
+        
         if (task->frozen) {
             ap_log_cerror(APLOG_MARK, APLOG_TRACE1, 0, c,
                           "h2_task(%s): process_request frozen", task->id);
diff -upr modules/http2/h2_version.h modules/http2/h2_version.h
--- a/modules/http2/h2_version.h	2018-02-10 16:46:12.000000000 +0100
+++ b/modules/http2/h2_version.h	2018-05-30 21:13:36.000000000 +0200
@@ -27,7 +27,7 @@
  * @macro
  * Version number of the http2 module as c string
  */
-#define MOD_HTTP2_VERSION "1.10.16"
+#define MOD_HTTP2_VERSION "1.10.20"
 
 /**
  * @macro
@@ -35,7 +35,7 @@
  * release. This is a 24 bit number with 8 bits for major number, 8 bits
  * for minor and 8 bits for patch. Version 1.2.3 becomes 0x010203.
  */
-#define MOD_HTTP2_VERSION_NUM 0x010a10
+#define MOD_HTTP2_VERSION_NUM 0x010a14
 
 
 #endif /* mod_h2_h2_version_h */
diff -upr modules/http2/mod_http2.c modules/http2/mod_http2.c
--- a/modules/http2/mod_http2.c	2018-02-10 16:46:12.000000000 +0100
+++ b/modules/http2/mod_http2.c	2018-05-29 23:06:49.000000000 +0200
@@ -193,6 +193,11 @@ static void http2_req_engine_done(h2_req
     h2_mplx_req_engine_done(ngn, r_conn, status);
 }
 
+static void http2_get_num_workers(server_rec *s, int *minw, int *maxw)
+{
+    h2_get_num_workers(s, minw, maxw);
+}
+
 /* Runs once per created child process. Perform any process 
  * related initionalization here.
  */
@@ -218,6 +223,7 @@ static void h2_hooks(apr_pool_t *pool)
     APR_REGISTER_OPTIONAL_FN(http2_req_engine_push);
     APR_REGISTER_OPTIONAL_FN(http2_req_engine_pull);
     APR_REGISTER_OPTIONAL_FN(http2_req_engine_done);
+    APR_REGISTER_OPTIONAL_FN(http2_get_num_workers);
 
     ap_log_perror(APLOG_MARK, APLOG_TRACE1, 0, pool, "installing hooks");
     
diff -upr modules/http2/mod_http2.h modules/http2/mod_http2.h
--- a/modules/http2/mod_http2.h	2018-02-10 16:46:12.000000000 +0100
+++ b/modules/http2/mod_http2.h	2018-05-29 23:06:49.000000000 +0200
@@ -93,4 +93,9 @@ APR_DECLARE_OPTIONAL_FN(void,
                         http2_req_engine_done, (h2_req_engine *engine, 
                                                 conn_rec *rconn,
                                                 apr_status_t status));
+
+APR_DECLARE_OPTIONAL_FN(void,
+                        http2_get_num_workers, (server_rec *s,
+                                                int *minw, int *max));
+
 #endif
