details: http://hg.nginx.org/nginx/rev/24488e6db782
branches:
changeset: 6201:24488e6db782
user: Roman Arutyunyan <arut@nginx.com>
date: Tue Jun 23 20:17:48 2015 +0300
description:
Stream: upstream and downstream limit rates.

diffstat:

src/stream/ngx_stream_proxy_module.c | 125 ++++++++++++++++++++++++++++++----
src/stream/ngx_stream_upstream.h | 1 +
2 files changed, 111 insertions(+), 15 deletions(-)

diffs (257 lines):

diff -r abee77018d3a -r 24488e6db782 src/stream/ngx_stream_proxy_module.c
--- a/src/stream/ngx_stream_proxy_module.c Tue Jun 23 20:17:47 2015 +0300
+++ b/src/stream/ngx_stream_proxy_module.c Tue Jun 23 20:17:48 2015 +0300
@@ -18,7 +18,9 @@ typedef struct {
ngx_msec_t timeout;
ngx_msec_t next_upstream_timeout;
size_t downstream_buf_size;
+ size_t downstream_limit_rate;
size_t upstream_buf_size;
+ size_t upstream_limit_rate;
ngx_uint_t next_upstream_tries;
ngx_flag_t next_upstream;
ngx_flag_t proxy_protocol;
@@ -132,6 +134,13 @@ static ngx_command_t ngx_stream_proxy_c
offsetof(ngx_stream_proxy_srv_conf_t, downstream_buf_size),
NULL },

+ { ngx_string("proxy_downstream_limit_rate"),
+ NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
+ ngx_conf_set_size_slot,
+ NGX_STREAM_SRV_CONF_OFFSET,
+ offsetof(ngx_stream_proxy_srv_conf_t, downstream_limit_rate),
+ NULL },
+
{ ngx_string("proxy_upstream_buffer"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_conf_set_size_slot,
@@ -139,6 +148,13 @@ static ngx_command_t ngx_stream_proxy_c
offsetof(ngx_stream_proxy_srv_conf_t, upstream_buf_size),
NULL },

+ { ngx_string("proxy_upstream_limit_rate"),
+ NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
+ ngx_conf_set_size_slot,
+ NGX_STREAM_SRV_CONF_OFFSET,
+ offsetof(ngx_stream_proxy_srv_conf_t, upstream_limit_rate),
+ NULL },
+
{ ngx_string("proxy_next_upstream"),
NGX_STREAM_MAIN_CONF|NGX_STREAM_SRV_CONF|NGX_CONF_FLAG,
ngx_conf_set_flag_slot,
@@ -340,6 +356,7 @@ ngx_stream_proxy_handler(ngx_stream_sess
}

u->proxy_protocol = pscf->proxy_protocol;
+ u->start_sec = ngx_time();

p = ngx_pnalloc(c->pool, pscf->downstream_buf_size);
if (p == NULL) {
@@ -831,17 +848,56 @@ ngx_stream_proxy_upstream_handler(ngx_ev
static void
ngx_stream_proxy_process_connection(ngx_event_t *ev, ngx_uint_t from_upstream)
{
- ngx_connection_t *c;
- ngx_stream_session_t *s;
- ngx_stream_upstream_t *u;
+ ngx_connection_t *c, *pc;
+ ngx_stream_session_t *s;
+ ngx_stream_upstream_t *u;
+ ngx_stream_proxy_srv_conf_t *pscf;

c = ev->data;
s = c->data;
u = s->upstream;

if (ev->timedout) {
- ngx_connection_error(c, NGX_ETIMEDOUT, "connection timed out");
- ngx_stream_proxy_finalize(s, NGX_DECLINED);
+
+ if (ev->delayed) {
+
+ ev->timedout = 0;
+ ev->delayed = 0;
+
+ if (!ev->ready) {
+ if (ngx_handle_read_event(ev, 0) != NGX_OK) {
+ ngx_stream_proxy_finalize(s, NGX_ERROR);
+ return;
+ }
+
+ if (u->upstream_buf.start) {
+ pc = u->peer.connection;
+
+ if (!c->read->delayed && !pc->read->delayed) {
+ pscf = ngx_stream_get_module_srv_conf(s,
+ ngx_stream_proxy_module);
+ ngx_add_timer(c->write, pscf->timeout);
+ }
+ }
+
+ return;
+ }
+
+ } else {
+ ngx_connection_error(c, NGX_ETIMEDOUT, "connection timed out");
+ ngx_stream_proxy_finalize(s, NGX_DECLINED);
+ return;
+ }
+
+ } else if (ev->delayed) {
+
+ ngx_log_debug0(NGX_LOG_DEBUG_STREAM, c->log, 0,
+ "stream connection delayed");
+
+ if (ngx_handle_read_event(ev, 0) != NGX_OK) {
+ ngx_stream_proxy_finalize(s, NGX_ERROR);
+ }
+
return;
}

@@ -930,10 +986,12 @@ static ngx_int_t
ngx_stream_proxy_process(ngx_stream_session_t *s, ngx_uint_t from_upstream,
ngx_uint_t do_write)
{
- size_t size;
+ off_t *received, limit;
+ size_t size, limit_rate;
ssize_t n;
ngx_buf_t *b;
ngx_uint_t flags;
+ ngx_msec_t delay;
ngx_connection_t *c, *pc, *src, *dst;
ngx_log_handler_pt handler;
ngx_stream_upstream_t *u;
@@ -944,15 +1002,21 @@ ngx_stream_proxy_process(ngx_stream_sess
c = s->connection;
pc = u->upstream_buf.start ? u->peer.connection : NULL;

+ pscf = ngx_stream_get_module_srv_conf(s, ngx_stream_proxy_module);
+
if (from_upstream) {
src = pc;
dst = c;
b = &u->upstream_buf;
+ limit_rate = pscf->upstream_limit_rate;
+ received = &u->received;

} else {
src = c;
dst = pc;
b = &u->downstream_buf;
+ limit_rate = pscf->downstream_limit_rate;
+ received = &s->received;
}

for ( ;; ) {
@@ -983,7 +1047,23 @@ ngx_stream_proxy_process(ngx_stream_sess

size = b->end - b->last;

- if (size && src->read->ready) {
+ if (size && src->read->ready && !src->read->delayed) {
+
+ if (limit_rate) {
+ limit = (off_t) limit_rate * (ngx_time() - u->start_sec + 1)
+ - *received;
+
+ if (limit <= 0) {
+ src->read->delayed = 1;
+ delay = (ngx_msec_t) (- limit * 1000 / limit_rate + 1);
+ ngx_add_timer(src->read, delay);
+ break;
+ }
+
+ if (size > (size_t) limit) {
+ size = limit;
+ }
+ }

n = src->recv(src, b->last, size);

@@ -992,15 +1072,19 @@ ngx_stream_proxy_process(ngx_stream_sess
}

if (n > 0) {
- if (from_upstream) {
- u->received += n;
+ if (limit_rate) {
+ delay = (ngx_msec_t) (n * 1000 / limit_rate);

- } else {
- s->received += n;
+ if (delay > 0) {
+ src->read->delayed = 1;
+ ngx_add_timer(src->read, delay);
+ }
}

+ *received += n;
+ b->last += n;
do_write = 1;
- b->last += n;
+
continue;
}

@@ -1012,8 +1096,6 @@ ngx_stream_proxy_process(ngx_stream_sess
break;
}

- pscf = ngx_stream_get_module_srv_conf(s, ngx_stream_proxy_module);
-
if (src->read->eof && (b->pos == b->last || (dst && dst->read->eof))) {
handler = c->log->handler;
c->log->handler = NULL;
@@ -1044,7 +1126,12 @@ ngx_stream_proxy_process(ngx_stream_sess
return NGX_ERROR;
}

- ngx_add_timer(c->read, pscf->timeout);
+ if (!c->read->delayed && !pc->read->delayed) {
+ ngx_add_timer(c->write, pscf->timeout);
+
+ } else if (c->write->timer_set) {
+ ngx_del_timer(c->write);
+ }
}

return NGX_OK;
@@ -1207,7 +1294,9 @@ ngx_stream_proxy_create_srv_conf(ngx_con
conf->timeout = NGX_CONF_UNSET_MSEC;
conf->next_upstream_timeout = NGX_CONF_UNSET_MSEC;
conf->downstream_buf_size = NGX_CONF_UNSET_SIZE;
+ conf->downstream_limit_rate = NGX_CONF_UNSET_SIZE;
conf->upstream_buf_size = NGX_CONF_UNSET_SIZE;
+ conf->upstream_limit_rate = NGX_CONF_UNSET_SIZE;
conf->next_upstream_tries = NGX_CONF_UNSET_UINT;
conf->next_upstream = NGX_CONF_UNSET;
conf->proxy_protocol = NGX_CONF_UNSET;
@@ -1244,9 +1333,15 @@ ngx_stream_proxy_merge_srv_conf(ngx_conf
ngx_conf_merge_size_value(conf->downstream_buf_size,
prev->downstream_buf_size, 16384);

+ ngx_conf_merge_size_value(conf->downstream_limit_rate,
+ prev->downstream_limit_rate, 0);
+
ngx_conf_merge_size_value(conf->upstream_buf_size,
prev->upstream_buf_size, 16384);

+ ngx_conf_merge_size_value(conf->upstream_limit_rate,
+ prev->upstream_limit_rate, 0);
+
ngx_conf_merge_uint_value(conf->next_upstream_tries,
prev->next_upstream_tries, 0);

diff -r abee77018d3a -r 24488e6db782 src/stream/ngx_stream_upstream.h
--- a/src/stream/ngx_stream_upstream.h Tue Jun 23 20:17:47 2015 +0300
+++ b/src/stream/ngx_stream_upstream.h Tue Jun 23 20:17:48 2015 +0300
@@ -83,6 +83,7 @@ typedef struct {
ngx_buf_t downstream_buf;
ngx_buf_t upstream_buf;
off_t received;
+ time_t start_sec;
#if (NGX_STREAM_SSL)
ngx_str_t ssl_name;
#endif

_______________________________________________
nginx-devel mailing list
nginx-devel@nginx.org
http://mailman.nginx.org/mailman/listinfo/nginx-devel