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-rw-r--r--src/plugins/hs_apps/http_tps.c117
1 files changed, 94 insertions, 23 deletions
diff --git a/src/plugins/hs_apps/http_tps.c b/src/plugins/hs_apps/http_tps.c
index 3dd89eef21c..59c18abc04d 100644
--- a/src/plugins/hs_apps/http_tps.c
+++ b/src/plugins/hs_apps/http_tps.c
@@ -26,9 +26,24 @@ typedef struct
u64 data_len;
u64 data_offset;
u32 vpp_session_index;
+ union
+ {
+ /** threshold after which connection is closed */
+ f64 close_threshold;
+ /** rate at which accepted sessions are marked for random close */
+ u32 close_rate;
+ };
u8 *uri;
} hts_session_t;
+typedef struct hts_listen_cfg_
+{
+ u8 *uri;
+ u32 vrf;
+ f64 rnd_close;
+ u8 is_del;
+} hts_listen_cfg_t;
+
typedef struct hs_main_
{
hts_session_t **sessions;
@@ -49,6 +64,7 @@ typedef struct hs_main_
u8 debug_level;
u8 no_zc;
u8 *default_uri;
+ u32 seed;
} hts_main_t;
static hts_main_t hts_main;
@@ -93,6 +109,22 @@ hts_session_free (hts_session_t *hs)
}
static void
+hts_disconnect_transport (hts_session_t *hs)
+{
+ vnet_disconnect_args_t _a = { 0 }, *a = &_a;
+ hts_main_t *htm = &hts_main;
+ session_t *ts;
+
+ if (htm->debug_level > 0)
+ clib_warning ("Actively closing session %u", hs->session_index);
+
+ ts = session_get (hs->vpp_session_index, hs->thread_index);
+ a->handle = session_handle (ts);
+ a->app_index = htm->app_index;
+ vnet_disconnect_session (a);
+}
+
+static void
hts_session_tx_zc (hts_session_t *hs, session_t *ts)
{
u32 to_send, space;
@@ -178,6 +210,12 @@ hts_session_tx (hts_session_t *hs, session_t *ts)
hts_session_tx_zc (hs, ts);
else
hts_session_tx_no_zc (hs, ts);
+
+ if (hs->close_threshold > 0)
+ {
+ if ((f64) hs->data_offset / hs->data_len > hs->close_threshold)
+ hts_disconnect_transport (hs);
+ }
}
static void
@@ -238,6 +276,16 @@ try_test_file (hts_session_t *hs, u8 *request)
hs->data_len = file_size;
hs->data_offset = 0;
+ if (hs->close_threshold > 0)
+ {
+ /* Disconnect if the header is already enough to fill the quota */
+ if ((f64) 30 / hs->data_len > hs->close_threshold)
+ {
+ hts_disconnect_transport (hs);
+ goto done;
+ }
+ }
+
hts_start_send_data (hs, HTTP_STATUS_OK);
done:
@@ -301,7 +349,8 @@ static int
hts_ts_accept_callback (session_t *ts)
{
hts_main_t *htm = &hts_main;
- hts_session_t *hs;
+ hts_session_t *hs, *lhs;
+ session_t *ls;
hs = hts_session_alloc (ts->thread_index);
hs->vpp_session_index = ts->session_index;
@@ -309,8 +358,21 @@ hts_ts_accept_callback (session_t *ts)
ts->opaque = hs->session_index;
ts->session_state = SESSION_STATE_READY;
+ /* Check if listener configured for random closes */
+ ls = listen_session_get_from_handle (ts->listener_handle);
+ lhs = hts_session_get (0, ls->opaque);
+
+ if (lhs->close_rate)
+ {
+ /* overload listener's data_offset as session counter */
+ u32 cnt = __atomic_add_fetch (&lhs->data_offset, 1, __ATOMIC_RELEASE);
+ if ((cnt % lhs->close_rate) == 0)
+ hs->close_threshold = random_f64 (&htm->seed);
+ }
+
if (htm->debug_level > 0)
- clib_warning ("Accepted session %u", ts->opaque);
+ clib_warning ("Accepted session %u close threshold %.2f", ts->opaque,
+ hs->close_threshold);
return 0;
}
@@ -330,7 +392,7 @@ hts_ts_disconnect_callback (session_t *ts)
vnet_disconnect_args_t _a = { 0 }, *a = &_a;
if (htm->debug_level > 0)
- clib_warning ("Closed session %u", ts->opaque);
+ clib_warning ("Transport closing session %u", ts->opaque);
a->handle = session_handle (ts);
a->app_index = htm->app_index;
@@ -344,7 +406,7 @@ hts_ts_reset_callback (session_t *ts)
vnet_disconnect_args_t _a = { 0 }, *a = &_a;
if (htm->debug_level > 0)
- clib_warning ("Reset session %u", ts->opaque);
+ clib_warning ("Transport reset session %u", ts->opaque);
a->handle = session_handle (ts);
a->app_index = htm->app_index;
@@ -438,7 +500,8 @@ hts_transport_needs_crypto (transport_proto_t proto)
}
static int
-hts_start_listen (hts_main_t *htm, session_endpoint_cfg_t *sep, u8 *uri)
+hts_start_listen (hts_main_t *htm, session_endpoint_cfg_t *sep, u8 *uri,
+ f64 rnd_close)
{
vnet_listen_args_t _a, *a = &_a;
u8 need_crypto;
@@ -471,6 +534,7 @@ hts_start_listen (hts_main_t *htm, session_endpoint_cfg_t *sep, u8 *uri)
hls = hts_session_alloc (0);
hls->uri = vec_dup (uri);
+ hls->close_rate = (f64) 1 / rnd_close;
ls = listen_session_get_from_handle (a->handle);
hls->vpp_session_index = ls->session_index;
hash_set_mem (htm->uri_to_handle, hls->uri, hls->session_index);
@@ -505,7 +569,7 @@ hts_stop_listen (hts_main_t *htm, u32 hls_index)
}
static clib_error_t *
-hts_listen (hts_main_t *htm, u32 vrf, u8 *listen_uri, u8 is_del)
+hts_listen (hts_main_t *htm, hts_listen_cfg_t *lcfg)
{
session_endpoint_cfg_t sep = SESSION_ENDPOINT_CFG_NULL;
clib_error_t *error = 0;
@@ -513,11 +577,11 @@ hts_listen (hts_main_t *htm, u32 vrf, u8 *listen_uri, u8 is_del)
uword *p;
int rv;
- uri = listen_uri ? listen_uri : htm->default_uri;
- uri_key = format (0, "vrf%u-%s", vrf, uri);
+ uri = lcfg->uri ? lcfg->uri : htm->default_uri;
+ uri_key = format (0, "vrf%u-%s", lcfg->vrf, uri);
p = hash_get_mem (htm->uri_to_handle, uri_key);
- if (is_del)
+ if (lcfg->is_del)
{
if (!p)
error = clib_error_return (0, "not listening on %v", uri);
@@ -538,22 +602,22 @@ hts_listen (hts_main_t *htm, u32 vrf, u8 *listen_uri, u8 is_del)
goto done;
}
- if (vrf)
+ if (lcfg->vrf)
{
fib_protocol_t fp;
u32 fib_index;
fp = sep.is_ip4 ? FIB_PROTOCOL_IP4 : FIB_PROTOCOL_IP6;
- fib_index = fib_table_find (fp, vrf);
+ fib_index = fib_table_find (fp, lcfg->vrf);
if (fib_index == ~0)
{
- error = clib_error_return (0, "no such vrf %u", vrf);
+ error = clib_error_return (0, "no such vrf %u", lcfg->vrf);
goto done;
}
sep.fib_index = fib_index;
}
- if ((rv = hts_start_listen (htm, &sep, uri_key)))
+ if ((rv = hts_start_listen (htm, &sep, uri_key, lcfg->rnd_close)))
{
error = clib_error_return (0, "failed to listen on %v: %U", uri,
format_session_error, rv);
@@ -596,11 +660,9 @@ hts_create_command_fn (vlib_main_t *vm, unformat_input_t *input,
{
unformat_input_t _line_input, *line_input = &_line_input;
hts_main_t *htm = &hts_main;
+ hts_listen_cfg_t lcfg = {};
clib_error_t *error = 0;
- u8 is_del = 0;
u64 mem_size;
- u8 *uri = 0;
- u32 vrf = 0;
/* Get a line of input. */
if (!unformat_user (input, unformat_line_input, line_input))
@@ -614,16 +676,25 @@ hts_create_command_fn (vlib_main_t *vm, unformat_input_t *input,
else if (unformat (line_input, "fifo-size %U", unformat_memory_size,
&mem_size))
htm->fifo_size = mem_size;
- else if (unformat (line_input, "vrf %u", &vrf))
- ;
- else if (unformat (line_input, "uri %s", &uri))
- ;
else if (unformat (line_input, "no-zc"))
htm->no_zc = 1;
else if (unformat (line_input, "debug"))
htm->debug_level = 1;
+ else if (unformat (line_input, "vrf %u", &lcfg.vrf))
+ ;
+ else if (unformat (line_input, "uri %s", &lcfg.uri))
+ ;
+ else if (unformat (line_input, "rnd-close %f", &lcfg.rnd_close))
+ {
+ if (lcfg.rnd_close > 1.0)
+ {
+ error = clib_error_return (0, "invalid rnd close value %f",
+ lcfg.rnd_close);
+ break;
+ }
+ }
else if (unformat (line_input, "del"))
- is_del = 1;
+ lcfg.is_del = 1;
else
{
error = clib_error_return (0, "unknown input `%U'",
@@ -650,11 +721,11 @@ start_server:
}
}
- error = hts_listen (htm, vrf, uri, is_del);
+ error = hts_listen (htm, &lcfg);
done:
- vec_free (uri);
+ vec_free (lcfg.uri);
return error;
}