From 435ab22dd5d9496a355be35e6540f0063f656465 Mon Sep 17 00:00:00 2001
From: Reyk Floeter <reyk@esdenera.com>
Date: Tue, 15 Jul 2014 11:45:52 +0200
Subject: sync inflight wip

---
 httpd.h       |  2 ++
 server.c      | 15 ++++++++-------
 server_file.c | 26 ++++++++++++++++++++++++--
 server_http.c |  8 ++++++--
 4 files changed, 40 insertions(+), 11 deletions(-)

diff --git a/httpd.h b/httpd.h
index bd24c43..79e89fa 100644
--- a/httpd.h
+++ b/httpd.h
@@ -341,6 +341,8 @@ struct httpd {
 #define HTTPD_OPT_LOGNOTIFY		0x10
 #define HTTPD_OPT_LOGALL		0x18
 
+extern volatile int server_inflight;
+
 /* control.c */
 int	 control_init(struct privsep *, struct control_sock *);
 int	 control_listen(struct control_sock *);
diff --git a/server.c b/server.c
index 977b864..876849b 100644
--- a/server.c
+++ b/server.c
@@ -448,7 +448,8 @@ server_accept(int fd, short event, void *arg)
 
 			event_del(&srv->srv_ev);
 			evtimer_add(&srv->srv_evt, &evtpause);
-			log_debug("%s: deferring connections", __func__);
+			log_debug("%s: deferring connections %d",
+			    __func__, getdtablecount());
 		}
 		return;
 	}
@@ -555,14 +556,9 @@ server_close(struct client *clt, const char *msg)
 	else if (clt->clt_output != NULL)
 		evbuffer_free(clt->clt_output);
 
-	if (clt->clt_file != NULL)
-		bufferevent_free(clt->clt_file);
-	if (clt->clt_fd != -1)
-		close(clt->clt_fd);
-
 	if (clt->clt_s != -1) {
 		close(clt->clt_s);
-		if (/* XXX */ -1) {
+		if (clt->clt_fd == -1 && 0) {
 			/*
 			 * the output was never connected,
 			 * thus this was an inflight client.
@@ -573,6 +569,11 @@ server_close(struct client *clt, const char *msg)
 		}
 	}
 
+	if (clt->clt_file != NULL)
+		bufferevent_free(clt->clt_file);
+	if (clt->clt_fd != -1)
+		close(clt->clt_fd);
+
 	if (clt->clt_log != NULL)
 		evbuffer_free(clt->clt_log);
 
diff --git a/server_file.c b/server_file.c
index e8db8a7..74a7106 100644
--- a/server_file.c
+++ b/server_file.c
@@ -84,7 +84,29 @@ server_file(struct httpd *env, struct client *clt)
 		return (-1);
 	}
 
-	if ((fd = open(path, O_RDONLY)) == -1 || fstat(fd, &st) == -1)
+	if ((fd = open(path, O_RDONLY)) == -1) {
+		/*
+		 * Pause accept if we are out of file descriptors, or
+		 * libevent will haunt us here too.
+		 */
+		if (errno == ENFILE || errno == EMFILE) {
+			struct timeval evtpause = { 1, 0 };
+
+			event_del(&srv->srv_ev);
+			evtimer_add(&srv->srv_evt, &evtpause);
+			log_debug("%s: deferring connections", __func__);
+			return (0);
+		}
+	}
+
+	if (clt->clt_persist <= 1) {
+		server_inflight--;
+		DPRINTF("%s: inflight decremented, now %d",
+		    __func__, server_inflight);
+		event_add(&srv->srv_ev, NULL);
+	}
+
+	if (fstat(fd, &st) == -1)
 		goto fail;
 
 	media = media_find(env->sc_mediatypes, path);
@@ -112,7 +134,7 @@ server_file(struct httpd *env, struct client *clt)
 
 	bufferevent_settimeout(clt->clt_file,
 	    srv->srv_conf.timeout.tv_sec, srv->srv_conf.timeout.tv_sec);
-	bufferevent_enable(clt->clt_file, EV_READ);
+	bufferevent_enable(clt->clt_file, EV_READ|EV_WRITE);
 
 	return (0);
  fail:
diff --git a/server_http.c b/server_http.c
index 329080a..a3991e3 100644
--- a/server_http.c
+++ b/server_http.c
@@ -502,10 +502,14 @@ server_read_httpchunks(struct bufferevent *bev, void *arg)
 }
 
 void
-server_reset_http(struct client *clt, int done)
+server_reset_http(struct client *clt, int all)
 {
 	struct http_descriptor	*desc = clt->clt_desc;
 
+	log_debug("%s: method %s done %d count %d fd %d p %d", __func__,
+	    server_httpmethod_byid(desc->http_method), all,
+	    getdtablecount(), clt->clt_fd, clt->clt_persist);
+
 	server_httpdesc_free(desc);
 	desc->http_method = 0;
 	desc->http_chunked = 0;
@@ -514,7 +518,7 @@ server_reset_http(struct client *clt, int done)
 	clt->clt_line = 0;
 	clt->clt_done = 0;
 
-	if (!done)
+	if (!all)
 		return;
 
 	clt->clt_toread = TOREAD_HTTP_HEADER;
-- 
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