Merge remote-tracking branch 'origin/patches-2.0'

Conflict in buffer.c: the new file-segment logic conflicted with the
solaris sendfile fix.

.gitignore

@@ -87,6 +87,7 @@ libevent_openssl.pc
 /test/regress
 /test/regress.gen.c
 /test/regress.gen.h
+/test/rpcgen-attempted
 /test/test-eof
 /test/test-init
 /test/test-ratelim

buffer.c

@@ -2218,12 +2218,18 @@ evbuffer_write_sendfile(struct evbuffer *buffer, evutil_socket_t dest_fd,
 	}
 	return (res);
 #elif defined(SENDFILE_IS_SOLARIS)
-	res = sendfile(dest_fd, source_fd, &offset, chain->off);
-	if (res == -1 && EVUTIL_ERR_RW_RETRIABLE(errno)) {
-		/* if this is EAGAIN or EINTR return 0; otherwise, -1 */
-		return (0);
+	{
+		const off_t offset_orig = offset;
+		res = sendfile(dest_fd, source_fd, &offset, chain->off);
+		if (res == -1 && EVUTIL_ERR_RW_RETRIABLE(errno)) {
+			if (offset - offset_orig)
+				return offset - offset_orig;
+			/* if this is EAGAIN or EINTR and no bytes were
+			 * written, return 0 */
+			return (0);
+		}
+		return (res);
 	}
-	return (res);
 #endif
 }
 #endif

bufferevent-internal.h

@@ -99,6 +99,8 @@ struct bufferevent_rate_limit_group {
 	/** The smallest number of bytes that any member of the group should
 	 * be limited to read or write at a time. */
 	ev_ssize_t min_share;
+	ev_ssize_t configured_min_share;
+
 	/** Timeout event that goes off once a tick, when the bucket is ready
 	 * to refill. */
 	struct event master_refill_event;

bufferevent_ratelim.c

@@ -637,13 +637,15 @@ bufferevent_rate_limit_group_new(struct event_base *base,
 
 	ev_token_bucket_init(&g->rate_limit, cfg, tick, 0);
 
-	g->min_share = 64;
 	event_assign(&g->master_refill_event, base, -1, EV_PERSIST,
 	    _bev_group_refill_callback, g);
 	/*XXXX handle event_add failure */
 	event_add(&g->master_refill_event, &cfg->tick_timeout);
 
 	EVTHREAD_ALLOC_LOCK(g->lock, EVTHREAD_LOCKTYPE_RECURSIVE);
+
+	bufferevent_rate_limit_group_set_min_share(g, 64);
+
 	return g;
 }
 
@@ -671,6 +673,9 @@ bufferevent_rate_limit_group_set_cfg(
 		event_add(&g->master_refill_event, &cfg->tick_timeout);
 	}
 
+	/* The new limits might force us to adjust min_share differently. */
+	bufferevent_rate_limit_group_set_min_share(g, g->configured_min_share);
+
 	UNLOCK_GROUP(g);
 	return 0;
 }
@@ -683,6 +688,15 @@ bufferevent_rate_limit_group_set_min_share(
 	if (share > EV_SSIZE_MAX)
 		return -1;
 
+	g->configured_min_share = share;
+
+	/* Can't set share to less than the one-tick maximum.  IOW, at steady
+	 * state, at least one connection can go per tick. */
+	if (share > g->rate_limit_cfg.read_rate)
+		share = g->rate_limit_cfg.read_rate;
+	if (share > g->rate_limit_cfg.write_rate)
+		share = g->rate_limit_cfg.write_rate;
+
 	g->min_share = share;
 	return 0;
 }

test/Makefile.am

@@ -2,7 +2,7 @@ AUTOMAKE_OPTIONS = foreign
 
 AM_CPPFLAGS = -I$(top_srcdir) -I$(top_srcdir)/compat -I$(top_srcdir)/include -I../include -DTINYTEST_LOCAL
 
-EXTRA_DIST = regress.rpc regress.gen.h regress.gen.c test.sh
+EXTRA_DIST = regress.rpc regress.gen.h regress.gen.c rpcgen_wrapper.sh test.sh
 
 noinst_PROGRAMS = test-init test-eof test-weof test-time \
 	bench bench_cascade bench_http bench_httpclient test-ratelim \
@@ -71,15 +71,20 @@ bench_http_LDADD = $(LIBEVENT_GC_SECTIONS) ../libevent.la
 bench_httpclient_SOURCES = bench_httpclient.c
 bench_httpclient_LDADD = $(LIBEVENT_GC_SECTIONS) ../libevent_core.la
 
-regress.gen.c regress.gen.h: regress.rpc $(top_srcdir)/event_rpcgen.py
-	if $(top_srcdir)/event_rpcgen.py $(srcdir)/regress.rpc ; then \
-	   echo "HI"; \
+regress.gen.c regress.gen.h: rpcgen-attempted
+
+rpcgen-attempted: $(srcdir)/regress.rpc $(srcdir)/../event_rpcgen.py $(srcdir)/rpcgen_wrapper.sh
+	date -u > $@
+	if $(srcdir)/rpcgen_wrapper.sh $(srcdir); then \
+	   echo "rpcgen okay"; \
 	else \
-	   echo "No Python installed; can't test RPC."; \
+	   echo "No Python installed; stubbing out RPC test." >&2; \
 	   echo " "> regress.gen.c; \
 	   echo "#define NO_PYTHON_EXISTS" > regress.gen.h; \
 	fi
 
+CLEANFILES = rpcgen-attempted
+
 DISTCLEANFILES = *~
 
 verify: check

test/rpcgen_wrapper.sh

@@ -0,0 +1,41 @@
+#!/bin/sh
+# libevent rpcgen_wrapper.sh
+# Transforms event_rpcgen.py failure into success for make, only if
+# regress.gen.c and regress.gen.h already exist in $srcdir.  This
+# is needed for "make distcheck" to pass the read-only $srcdir build,
+# as with read-only sources fresh from tarball, regress.gen.[ch] will
+# be correct in $srcdir but unwritable.  This previously triggered
+# Makefile.am to create stub regress.gen.c and regress.gen.h in the
+# distcheck _build directory, which were then detected as leftover
+# files in the build tree after distclean, breaking distcheck.
+# Note that regress.gen.[ch] are not in fresh git clones, making
+# working Python a requirement for make distcheck of a git tree.
+
+exit_updated() {
+    echo "Updated ${srcdir}\regress.gen.c and ${srcdir}\regress.gen.h"
+    exit 0
+}
+
+exit_reuse() {
+    echo "event_rpcgen.py failed, ${srcdir}\regress.gen.\[ch\] will be reused." >&2
+    exit 0
+}
+
+exit_failed() {
+    echo "Could not generate regress.gen.\[ch\] using event_rpcgen.sh" >&2
+    exit 1
+}
+
+srcdir=$1
+srcdir=${srcdir:-.}
+${srcdir}/../event_rpcgen.py ${srcdir}/regress.rpc
+case "$?" in
+ 0)
+    exit_updated
+    ;;
+ *)
+    test -r ${srcdir}/regress.gen.c -a -r ${srcdir}/regress.gen.h && \
+	exit_reuse
+    exit_failed
+    ;;
+esac