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Merge branch 'bufev_ratelim_and_wm'
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commit
b161674d5d
9
changes/bug3804
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9
changes/bug3804
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@ -0,0 +1,9 @@
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o Major bugfixes (bufferevents):
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- Apply rate-limiting only at the bottom of a chain of filtering
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bufferevents. This prevents us from filling up internal read
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buffers and violating rate-limits when filtering bufferevents
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are enabled. Bugfix on 0.2.3.1-alpha; fixes part of bug 3804.
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- Add high-watermarks to the output buffers for filtered
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bufferevents. This prevents us from filling up internal write
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buffers and wasting CPU cycles when filtering bufferevents are
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enabled. Bugfix on 0.2.3.1-alpha; fixes part of bug 3804.
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5
changes/bug3805
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5
changes/bug3805
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o Major bugfixes (bufferevents):
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- Correctly notice when data has been written from a bufferevent
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without flushing it completely. Bugfix on 0.2.3.1-alpha; fixes
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bug 3805.
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@ -20,6 +20,9 @@
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#ifdef HAVE_EVENT2_EVENT_H
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#include <event2/event.h>
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#include <event2/thread.h>
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#ifdef USE_BUFFEREVENTS
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#include <event2/bufferevent.h>
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#endif
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#else
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#include <event.h>
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#endif
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@ -614,5 +617,28 @@ tor_libevent_get_one_tick_timeout(void)
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}
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return one_tick;
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}
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static struct bufferevent *
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tor_get_root_bufferevent(struct bufferevent *bev)
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{
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struct bufferevent *u;
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while ((u = bufferevent_get_underlying(bev)) != NULL)
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bev = u;
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return bev;
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}
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int
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tor_set_bufferevent_rate_limit(struct bufferevent *bev,
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struct ev_token_bucket_cfg *cfg)
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{
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return bufferevent_set_rate_limit(tor_get_root_bufferevent(bev), cfg);
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}
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int
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tor_add_bufferevent_to_rate_limit_group(struct bufferevent *bev,
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struct bufferevent_rate_limit_group *g)
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{
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return bufferevent_add_to_rate_limit_group(tor_get_root_bufferevent(bev), g);
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}
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#endif
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@ -10,6 +10,8 @@ struct event;
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struct event_base;
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#ifdef USE_BUFFEREVENTS
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struct bufferevent;
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struct ev_token_bucket_cfg;
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struct bufferevent_rate_limit_group;
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#endif
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#ifdef HAVE_EVENT2_EVENT_H
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@ -74,6 +76,10 @@ const char *tor_libevent_get_version_str(void);
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#define TOR_LIBEVENT_TICKS_PER_SECOND 3
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const struct timeval *tor_libevent_get_one_tick_timeout(void);
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int tor_libevent_using_iocp_bufferevents(void);
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int tor_set_bufferevent_rate_limit(struct bufferevent *bev,
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struct ev_token_bucket_cfg *cfg);
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int tor_add_bufferevent_to_rate_limit_group(struct bufferevent *bev,
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struct bufferevent_rate_limit_group *g);
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#endif
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#endif
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@ -51,6 +51,7 @@
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#ifdef USE_BUFFEREVENTS
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#include <event2/bufferevent_ssl.h>
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#include <event2/buffer.h>
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#include <event2/event.h>
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#include "compat_libevent.h"
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#endif
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@ -1905,6 +1906,10 @@ tor_tls_init_bufferevent(tor_tls_t *tls, struct bufferevent *bufev_in,
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state,
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BEV_OPT_DEFER_CALLBACKS|
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BEV_OPT_CLOSE_ON_FREE);
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/* Tell the underlying bufferevent when to accept more data from the SSL
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filter (only when it's got less than 32K to write), and when to notify
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the SSL filter that it could write more (when it drops under 24K). */
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bufferevent_setwatermark(bufev_in, EV_WRITE, 24*1024, 32*1024);
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} else {
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if (bufev_in) {
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evutil_socket_t s = bufferevent_getfd(bufev_in);
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@ -2509,7 +2509,7 @@ connection_enable_rate_limiting(connection_t *conn)
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if (conn->bufev) {
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if (!global_rate_limit)
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connection_bucket_init();
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bufferevent_add_to_rate_limit_group(conn->bufev, global_rate_limit);
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tor_add_bufferevent_to_rate_limit_group(conn->bufev, global_rate_limit);
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}
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}
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@ -2947,6 +2947,11 @@ connection_configure_bufferevent_callbacks(connection_t *conn)
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connection_handle_write_cb,
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connection_handle_event_cb,
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conn);
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/* Set a fairly high write low-watermark so that we get the write callback
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called whenever data is written to bring us under 128K. Leave the
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high-watermark at 0.
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*/
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bufferevent_setwatermark(bufev, EV_WRITE, 128*1024, 0);
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input = bufferevent_get_input(bufev);
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output = bufferevent_get_output(bufev);
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@ -585,7 +585,7 @@ connection_or_update_token_buckets_helper(or_connection_t *conn, int reset,
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burst, tick);
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old_cfg = conn->bucket_cfg;
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if (conn->_base.bufev)
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bufferevent_set_rate_limit(conn->_base.bufev, cfg);
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tor_set_bufferevent_rate_limit(conn->_base.bufev, cfg);
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if (old_cfg)
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ev_token_bucket_cfg_free(old_cfg);
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conn->bucket_cfg = cfg;
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@ -1102,7 +1102,7 @@ connection_tls_start_handshake(or_connection_t *conn, int receiving)
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}
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conn->_base.bufev = b;
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if (conn->bucket_cfg)
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bufferevent_set_rate_limit(conn->_base.bufev, conn->bucket_cfg);
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tor_set_bufferevent_rate_limit(conn->_base.bufev, conn->bucket_cfg);
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connection_enable_rate_limiting(TO_CONN(conn));
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connection_configure_bufferevent_callbacks(TO_CONN(conn));
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