/*
- * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Copyright (c) 2017-2019 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
* limitations under the License.
*/
-#include <vnet/session/transport_interface.h>
+#include <vnet/session/transport.h>
#include <vnet/session/session.h>
#include <vnet/fib/fib.h>
*/
transport_proto_vft_t *tp_vfts;
-/*
- * Port allocator seed
- */
-static u32 port_allocator_seed;
-
-/*
- * Local endpoints table
- */
-static transport_endpoint_table_t local_endpoints_table;
-
-/*
- * Pool of local endpoints
- */
-static transport_endpoint_t *local_endpoints;
-
-/*
- * Local endpoints pool lock
- */
-static clib_spinlock_t local_endpoints_lock;
+typedef struct local_endpoint_
+{
+ transport_endpoint_t ep;
+ transport_proto_t proto;
+ int refcnt;
+} local_endpoint_t;
-/*
- * Period used by transport pacers. Initialized by session layer
- */
-static double transport_pacer_period;
+typedef struct transport_main_
+{
+ transport_endpoint_table_t local_endpoints_table;
+ local_endpoint_t *local_endpoints;
+ u32 *lcl_endpts_freelist;
+ u32 port_allocator_seed;
+ u8 lcl_endpts_cleanup_pending;
+ clib_spinlock_t local_endpoints_lock;
+} transport_main_t;
-#define TRANSPORT_PACER_MIN_MSS 1460
-#define TRANSPORT_PACER_MIN_BURST TRANSPORT_PACER_MIN_MSS
+static transport_main_t tp_main;
u8 *
format_transport_proto (u8 * s, va_list * args)
{
u32 transport_proto = va_arg (*args, u32);
- switch (transport_proto)
- {
- case TRANSPORT_PROTO_TCP:
- s = format (s, "TCP");
- break;
- case TRANSPORT_PROTO_UDP:
- s = format (s, "UDP");
- break;
- case TRANSPORT_PROTO_SCTP:
- s = format (s, "SCTP");
- break;
- case TRANSPORT_PROTO_UDPC:
- s = format (s, "UDPC");
- break;
- }
+
+ if (tp_vfts[transport_proto].transport_options.name)
+ s = format (s, "%s", tp_vfts[transport_proto].transport_options.name);
+ else
+ s = format (s, "n/a");
+
return s;
}
format_transport_proto_short (u8 * s, va_list * args)
{
u32 transport_proto = va_arg (*args, u32);
- switch (transport_proto)
- {
- case TRANSPORT_PROTO_TCP:
- s = format (s, "T");
- break;
- case TRANSPORT_PROTO_UDP:
- s = format (s, "U");
- break;
- case TRANSPORT_PROTO_SCTP:
- s = format (s, "S");
- break;
- case TRANSPORT_PROTO_UDPC:
- s = format (s, "U");
- break;
- }
+ char *short_name;
+
+ short_name = tp_vfts[transport_proto].transport_options.short_name;
+ if (short_name)
+ s = format (s, "%s", short_name);
+ else
+ s = format (s, "NA");
+
return s;
}
s = format (s, "%U", tp_vft->format_connection, conn_index, thread_index,
verbose);
tc = tp_vft->get_connection (conn_index, thread_index);
- if (tc && transport_connection_is_tx_paced (tc) && verbose > 1)
+ if (tc && verbose > 1)
{
indent = format_get_indent (s) + 1;
- s = format (s, "%Upacer: %U\n", format_white_space, indent,
- format_transport_pacer, &tc->pacer);
+ if (transport_connection_is_tx_paced (tc))
+ s = format (s, "%Upacer: %U\n", format_white_space, indent,
+ format_transport_pacer, &tc->pacer, tc->thread_index);
+ s = format (s, "%Utransport: flags 0x%x\n", format_white_space, indent,
+ tc->flags);
}
return s;
}
format_transport_listen_connection (u8 * s, va_list * args)
{
u32 transport_proto = va_arg (*args, u32);
- u32 listen_index = va_arg (*args, u32);
transport_proto_vft_t *tp_vft;
tp_vft = transport_protocol_get_vft (transport_proto);
if (!tp_vft)
return s;
- s = format (s, "%U", tp_vft->format_listener, listen_index);
+ s = (tp_vft->format_listener) (s, args);
return s;
}
format_transport_half_open_connection (u8 * s, va_list * args)
{
u32 transport_proto = va_arg (*args, u32);
- u32 listen_index = va_arg (*args, u32);
+ u32 ho_index = va_arg (*args, u32);
transport_proto_vft_t *tp_vft;
tp_vft = transport_protocol_get_vft (transport_proto);
if (!tp_vft)
return s;
- s = format (s, "%U", tp_vft->format_half_open, listen_index);
+ s = format (s, "%U", tp_vft->format_half_open, ho_index);
return s;
}
+static u8
+unformat_transport_str_match (unformat_input_t * input, const char *str)
+{
+ int i;
+
+ if (strlen (str) > vec_len (input->buffer) - input->index)
+ return 0;
+
+ for (i = 0; i < strlen (str); i++)
+ {
+ if (input->buffer[i + input->index] != str[i])
+ return 0;
+ }
+ return 1;
+}
+
uword
unformat_transport_proto (unformat_input_t * input, va_list * args)
{
u32 *proto = va_arg (*args, u32 *);
- if (unformat (input, "tcp"))
- *proto = TRANSPORT_PROTO_TCP;
- else if (unformat (input, "TCP"))
- *proto = TRANSPORT_PROTO_TCP;
- else if (unformat (input, "udp"))
- *proto = TRANSPORT_PROTO_UDP;
- else if (unformat (input, "UDP"))
- *proto = TRANSPORT_PROTO_UDP;
- else if (unformat (input, "sctp"))
- *proto = TRANSPORT_PROTO_SCTP;
- else if (unformat (input, "SCTP"))
- *proto = TRANSPORT_PROTO_SCTP;
- else if (unformat (input, "tls"))
- *proto = TRANSPORT_PROTO_TLS;
- else if (unformat (input, "TLS"))
- *proto = TRANSPORT_PROTO_TLS;
- else if (unformat (input, "udpc"))
- *proto = TRANSPORT_PROTO_UDPC;
- else if (unformat (input, "UDPC"))
- *proto = TRANSPORT_PROTO_UDPC;
- else
- return 0;
- return 1;
+ transport_proto_vft_t *tp_vft;
+ u8 longest_match = 0, match;
+ char *str, *str_match = 0;
+ transport_proto_t tp;
+
+ for (tp = 0; tp < vec_len (tp_vfts); tp++)
+ {
+ tp_vft = &tp_vfts[tp];
+ str = tp_vft->transport_options.name;
+ if (!str)
+ continue;
+ if (unformat_transport_str_match (input, str))
+ {
+ match = strlen (str);
+ if (match > longest_match)
+ {
+ *proto = tp;
+ longest_match = match;
+ str_match = str;
+ }
+ }
+ }
+ if (longest_match)
+ {
+ (void) unformat (input, str_match);
+ return 1;
+ }
+
+ return 0;
+}
+
+u8 *
+format_transport_protos (u8 * s, va_list * args)
+{
+ transport_proto_vft_t *tp_vft;
+
+ vec_foreach (tp_vft, tp_vfts)
+ s = format (s, "%s\n", tp_vft->transport_options.name);
+
+ return s;
}
u32
clib_bihash_add_del_24_8 (ht, &kv, 0);
}
-/**
- * Register transport virtual function table.
- *
- * @param transport_proto - transport protocol type (i.e., TCP, UDP ..)
- * @param vft - virtual function table for transport proto
- * @param fib_proto - network layer protocol
- * @param output_node - output node index that session layer will hand off
- * buffers to, for requested fib proto
- */
void
transport_register_protocol (transport_proto_t transport_proto,
const transport_proto_vft_t * vft,
session_register_transport (transport_proto, vft, is_ip4, output_node);
}
+transport_proto_t
+transport_register_new_protocol (const transport_proto_vft_t * vft,
+ fib_protocol_t fib_proto, u32 output_node)
+{
+ transport_proto_t transport_proto;
+ u8 is_ip4;
+
+ transport_proto = session_add_transport_proto ();
+ is_ip4 = fib_proto == FIB_PROTOCOL_IP4;
+
+ vec_validate (tp_vfts, transport_proto);
+ tp_vfts[transport_proto] = *vft;
+
+ session_register_transport (transport_proto, vft, is_ip4, output_node);
+
+ return transport_proto;
+}
+
/**
* Get transport virtual function table
*
transport_service_type_t
transport_protocol_service_type (transport_proto_t tp)
{
- return tp_vfts[tp].service_type;
+ return tp_vfts[tp].transport_options.service_type;
}
transport_tx_fn_type_t
transport_protocol_tx_fn_type (transport_proto_t tp)
{
- return tp_vfts[tp].tx_type;
+ return tp_vfts[tp].transport_options.tx_type;
+}
+
+void
+transport_cleanup (transport_proto_t tp, u32 conn_index, u8 thread_index)
+{
+ tp_vfts[tp].cleanup (conn_index, thread_index);
+}
+
+void
+transport_cleanup_half_open (transport_proto_t tp, u32 conn_index)
+{
+ if (tp_vfts[tp].cleanup_ho)
+ tp_vfts[tp].cleanup_ho (conn_index);
+}
+
+int
+transport_connect (transport_proto_t tp, transport_endpoint_cfg_t * tep)
+{
+ if (PREDICT_FALSE (!tp_vfts[tp].connect))
+ return SESSION_E_TRANSPORT_NO_REG;
+ return tp_vfts[tp].connect (tep);
+}
+
+void
+transport_half_close (transport_proto_t tp, u32 conn_index, u8 thread_index)
+{
+ if (tp_vfts[tp].half_close)
+ tp_vfts[tp].half_close (conn_index, thread_index);
+}
+
+void
+transport_close (transport_proto_t tp, u32 conn_index, u8 thread_index)
+{
+ tp_vfts[tp].close (conn_index, thread_index);
+}
+
+void
+transport_reset (transport_proto_t tp, u32 conn_index, u8 thread_index)
+{
+ if (tp_vfts[tp].reset)
+ tp_vfts[tp].reset (conn_index, thread_index);
+ else
+ tp_vfts[tp].close (conn_index, thread_index);
+}
+
+u32
+transport_start_listen (transport_proto_t tp, u32 session_index,
+ transport_endpoint_cfg_t *tep)
+{
+ if (PREDICT_FALSE (!tp_vfts[tp].start_listen))
+ return SESSION_E_TRANSPORT_NO_REG;
+ return tp_vfts[tp].start_listen (session_index, tep);
+}
+
+u32
+transport_stop_listen (transport_proto_t tp, u32 conn_index)
+{
+ return tp_vfts[tp].stop_listen (conn_index);
}
u8
transport_protocol_is_cl (transport_proto_t tp)
{
- return (tp_vfts[tp].service_type == TRANSPORT_SERVICE_CL);
+ return (tp_vfts[tp].transport_options.service_type == TRANSPORT_SERVICE_CL);
+}
+
+always_inline void
+default_get_transport_endpoint (transport_connection_t * tc,
+ transport_endpoint_t * tep, u8 is_lcl)
+{
+ if (is_lcl)
+ {
+ tep->port = tc->lcl_port;
+ tep->is_ip4 = tc->is_ip4;
+ clib_memcpy_fast (&tep->ip, &tc->lcl_ip, sizeof (tc->lcl_ip));
+ }
+ else
+ {
+ tep->port = tc->rmt_port;
+ tep->is_ip4 = tc->is_ip4;
+ clib_memcpy_fast (&tep->ip, &tc->rmt_ip, sizeof (tc->rmt_ip));
+ }
+}
+
+void
+transport_get_endpoint (transport_proto_t tp, u32 conn_index,
+ u32 thread_index, transport_endpoint_t * tep,
+ u8 is_lcl)
+{
+ if (tp_vfts[tp].get_transport_endpoint)
+ tp_vfts[tp].get_transport_endpoint (conn_index, thread_index, tep,
+ is_lcl);
+ else
+ {
+ transport_connection_t *tc;
+ tc = transport_get_connection (tp, conn_index, thread_index);
+ default_get_transport_endpoint (tc, tep, is_lcl);
+ }
+}
+
+void
+transport_get_listener_endpoint (transport_proto_t tp, u32 conn_index,
+ transport_endpoint_t * tep, u8 is_lcl)
+{
+ if (tp_vfts[tp].get_transport_listener_endpoint)
+ tp_vfts[tp].get_transport_listener_endpoint (conn_index, tep, is_lcl);
+ else
+ {
+ transport_connection_t *tc;
+ tc = transport_get_listener (tp, conn_index);
+ default_get_transport_endpoint (tc, tep, is_lcl);
+ }
+}
+
+int
+transport_connection_attribute (transport_proto_t tp, u32 conn_index,
+ u8 thread_index, u8 is_get,
+ transport_endpt_attr_t *attr)
+{
+ if (!tp_vfts[tp].attribute)
+ return -1;
+
+ return tp_vfts[tp].attribute (conn_index, thread_index, is_get, attr);
}
#define PORT_MASK ((1 << 16)- 1)
void
-transport_endpoint_del (u32 tepi)
+transport_endpoint_free (u32 tepi)
{
- clib_spinlock_lock_if_init (&local_endpoints_lock);
- pool_put_index (local_endpoints, tepi);
- clib_spinlock_unlock_if_init (&local_endpoints_lock);
+ transport_main_t *tm = &tp_main;
+ pool_put_index (tm->local_endpoints, tepi);
}
-always_inline transport_endpoint_t *
-transport_endpoint_new (void)
+always_inline local_endpoint_t *
+transport_endpoint_alloc (void)
{
- transport_endpoint_t *tep;
- pool_get_zero (local_endpoints, tep);
- return tep;
+ transport_main_t *tm = &tp_main;
+ local_endpoint_t *lep;
+
+ ASSERT (vlib_get_thread_index () <= transport_cl_thread ());
+
+ pool_get_aligned_safe (tm->local_endpoints, lep, 0);
+ return lep;
+}
+
+static void
+transport_cleanup_freelist (void)
+{
+ transport_main_t *tm = &tp_main;
+ local_endpoint_t *lep;
+ u32 *lep_indexp;
+
+ clib_spinlock_lock (&tm->local_endpoints_lock);
+
+ vec_foreach (lep_indexp, tm->lcl_endpts_freelist)
+ {
+ lep = pool_elt_at_index (tm->local_endpoints, *lep_indexp);
+
+ /* Port re-shared after attempt to cleanup */
+ if (lep->refcnt > 0)
+ continue;
+
+ transport_endpoint_table_del (&tm->local_endpoints_table, lep->proto,
+ &lep->ep);
+ transport_endpoint_free (*lep_indexp);
+ }
+
+ vec_reset_length (tm->lcl_endpts_freelist);
+
+ tm->lcl_endpts_cleanup_pending = 0;
+
+ clib_spinlock_unlock (&tm->local_endpoints_lock);
}
void
-transport_endpoint_cleanup (u8 proto, ip46_address_t * lcl_ip, u16 port)
+transport_program_endpoint_cleanup (u32 lepi)
{
- u32 tepi;
- transport_endpoint_t *tep;
+ transport_main_t *tm = &tp_main;
+ u8 flush_fl = 0;
+
+ /* All workers can free connections. Synchronize access to freelist */
+ clib_spinlock_lock (&tm->local_endpoints_lock);
+
+ vec_add1 (tm->lcl_endpts_freelist, lepi);
+
+ /* Avoid accumulating lots of endpoints for cleanup */
+ if (!tm->lcl_endpts_cleanup_pending &&
+ vec_len (tm->lcl_endpts_freelist) > 32)
+ {
+ tm->lcl_endpts_cleanup_pending = 1;
+ flush_fl = 1;
+ }
- /* Cleanup local endpoint if this was an active connect */
- tepi = transport_endpoint_lookup (&local_endpoints_table, proto, lcl_ip,
+ clib_spinlock_unlock (&tm->local_endpoints_lock);
+
+ if (flush_fl)
+ session_send_rpc_evt_to_thread_force (transport_cl_thread (),
+ transport_cleanup_freelist, 0);
+}
+
+int
+transport_release_local_endpoint (u8 proto, ip46_address_t *lcl_ip, u16 port)
+{
+ transport_main_t *tm = &tp_main;
+ local_endpoint_t *lep;
+ u32 lepi;
+
+ lepi = transport_endpoint_lookup (&tm->local_endpoints_table, proto, lcl_ip,
clib_net_to_host_u16 (port));
- if (tepi != ENDPOINT_INVALID_INDEX)
+ if (lepi == ENDPOINT_INVALID_INDEX)
+ return -1;
+
+ lep = pool_elt_at_index (tm->local_endpoints, lepi);
+
+ /* Local endpoint no longer in use, program cleanup */
+ if (!clib_atomic_sub_fetch (&lep->refcnt, 1))
{
- tep = pool_elt_at_index (local_endpoints, tepi);
- transport_endpoint_table_del (&local_endpoints_table, proto, tep);
- transport_endpoint_del (tepi);
+ transport_program_endpoint_cleanup (lepi);
+ return 0;
}
+
+ /* Not an error, just in idication that endpoint was not cleaned up */
+ return -1;
}
-static void
-transport_endpoint_mark_used (u8 proto, ip46_address_t * ip, u16 port)
+static int
+transport_endpoint_mark_used (u8 proto, ip46_address_t *ip, u16 port)
+{
+ transport_main_t *tm = &tp_main;
+ local_endpoint_t *lep;
+ u32 tei;
+
+ ASSERT (vlib_get_thread_index () <= transport_cl_thread ());
+
+ tei =
+ transport_endpoint_lookup (&tm->local_endpoints_table, proto, ip, port);
+ if (tei != ENDPOINT_INVALID_INDEX)
+ return SESSION_E_PORTINUSE;
+
+ /* Pool reallocs with worker barrier */
+ lep = transport_endpoint_alloc ();
+ clib_memcpy_fast (&lep->ep.ip, ip, sizeof (*ip));
+ lep->ep.port = port;
+ lep->proto = proto;
+ lep->refcnt = 1;
+
+ transport_endpoint_table_add (&tm->local_endpoints_table, proto, &lep->ep,
+ lep - tm->local_endpoints);
+
+ return 0;
+}
+
+void
+transport_share_local_endpoint (u8 proto, ip46_address_t * lcl_ip, u16 port)
{
- transport_endpoint_t *tep;
- clib_spinlock_lock_if_init (&local_endpoints_lock);
- tep = transport_endpoint_new ();
- clib_memcpy_fast (&tep->ip, ip, sizeof (*ip));
- tep->port = port;
- transport_endpoint_table_add (&local_endpoints_table, proto, tep,
- tep - local_endpoints);
- clib_spinlock_unlock_if_init (&local_endpoints_lock);
+ transport_main_t *tm = &tp_main;
+ local_endpoint_t *lep;
+ u32 lepi;
+
+ /* Active opens should call this only from a control thread, which are also
+ * used to allocate and free ports. So, pool has only one writer and
+ * potentially many readers. Listeners are allocated with barrier */
+ lepi = transport_endpoint_lookup (&tm->local_endpoints_table, proto, lcl_ip,
+ clib_net_to_host_u16 (port));
+ if (lepi != ENDPOINT_INVALID_INDEX)
+ {
+ lep = pool_elt_at_index (tm->local_endpoints, lepi);
+ clib_atomic_add_fetch (&lep->refcnt, 1);
+ }
}
/**
transport_alloc_local_port (u8 proto, ip46_address_t * ip)
{
u16 min = 1024, max = 65535; /* XXX configurable ? */
+ transport_main_t *tm = &tp_main;
int tries, limit;
- u32 tei;
limit = max - min;
- /* Only support active opens from thread 0 */
- ASSERT (vlib_get_thread_index () == 0);
+ /* Only support active opens from one of ctrl threads */
+ ASSERT (vlib_get_thread_index () <= transport_cl_thread ());
+
+ /* Cleanup freelist if need be */
+ if (vec_len (tm->lcl_endpts_freelist))
+ transport_cleanup_freelist ();
/* Search for first free slot */
for (tries = 0; tries < limit; tries++)
/* Find a port in the specified range */
while (1)
{
- port = random_u32 (&port_allocator_seed) & PORT_MASK;
+ port = random_u32 (&tm->port_allocator_seed) & PORT_MASK;
if (PREDICT_TRUE (port >= min && port < max))
break;
}
- /* Look it up. If not found, we're done */
- tei = transport_endpoint_lookup (&local_endpoints_table, proto, ip,
- port);
- if (tei == ENDPOINT_INVALID_INDEX)
- {
- transport_endpoint_mark_used (proto, ip, port);
- return port;
- }
+ if (!transport_endpoint_mark_used (proto, ip, port))
+ return port;
}
return -1;
}
-static clib_error_t *
+static session_error_t
transport_get_interface_ip (u32 sw_if_index, u8 is_ip4, ip46_address_t * addr)
{
if (is_ip4)
ip4_address_t *ip4;
ip4 = ip_interface_get_first_ip (sw_if_index, 1);
if (!ip4)
- return clib_error_return (0, "no routable ip4 address on %U",
- format_vnet_sw_if_index_name,
- vnet_get_main (), sw_if_index);
+ return SESSION_E_NOIP;
addr->ip4.as_u32 = ip4->as_u32;
}
else
ip6_address_t *ip6;
ip6 = ip_interface_get_first_ip (sw_if_index, 0);
if (ip6 == 0)
- return clib_error_return (0, "no routable ip6 addresses on %U",
- format_vnet_sw_if_index_name,
- vnet_get_main (), sw_if_index);
+ return SESSION_E_NOIP;
clib_memcpy_fast (&addr->ip6, ip6, sizeof (*ip6));
}
return 0;
}
-static clib_error_t *
-transport_find_local_ip_for_remote (u32 sw_if_index,
- transport_endpoint_t * rmt,
- ip46_address_t * lcl_addr)
+static session_error_t
+transport_find_local_ip_for_remote (u32 *sw_if_index,
+ transport_endpoint_t *rmt,
+ ip46_address_t *lcl_addr)
{
fib_node_index_t fei;
fib_prefix_t prefix;
- if (sw_if_index == ENDPOINT_INVALID_INDEX)
+ if (*sw_if_index == ENDPOINT_INVALID_INDEX)
{
/* Find a FIB path to the destination */
clib_memcpy_fast (&prefix.fp_addr, &rmt->ip, sizeof (rmt->ip));
/* Couldn't find route to destination. Bail out. */
if (fei == FIB_NODE_INDEX_INVALID)
- return clib_error_return (0, "no route to %U", format_ip46_address,
- &rmt->ip, (rmt->is_ip4 == 0) + 1);
-
- sw_if_index = fib_entry_get_resolving_interface (fei);
- if (sw_if_index == ENDPOINT_INVALID_INDEX)
- return clib_error_return (0, "no resolving interface for %U",
- format_ip46_address, &rmt->ip,
- (rmt->is_ip4 == 0) + 1);
+ return SESSION_E_NOROUTE;
+
+ *sw_if_index = fib_entry_get_resolving_interface (fei);
+ if (*sw_if_index == ENDPOINT_INVALID_INDEX)
+ return SESSION_E_NOINTF;
}
clib_memset (lcl_addr, 0, sizeof (*lcl_addr));
- return transport_get_interface_ip (sw_if_index, rmt->is_ip4, lcl_addr);
+ return transport_get_interface_ip (*sw_if_index, rmt->is_ip4, lcl_addr);
}
int
ip46_address_t * lcl_addr, u16 * lcl_port)
{
transport_endpoint_t *rmt = (transport_endpoint_t *) rmt_cfg;
- clib_error_t *error;
+ session_error_t error;
int port;
- u32 tei;
/*
* Find the local address
*/
if (ip_is_zero (&rmt_cfg->peer.ip, rmt_cfg->peer.is_ip4))
{
- error = transport_find_local_ip_for_remote (rmt_cfg->peer.sw_if_index,
+ error = transport_find_local_ip_for_remote (&rmt_cfg->peer.sw_if_index,
rmt, lcl_addr);
if (error)
- return -1;
+ return error;
}
else
{
{
port = transport_alloc_local_port (proto, lcl_addr);
if (port < 1)
- {
- clib_warning ("Failed to allocate src port");
- return -1;
- }
+ return SESSION_E_NOPORT;
*lcl_port = port;
}
else
{
port = clib_net_to_host_u16 (rmt_cfg->peer.port);
- tei = transport_endpoint_lookup (&local_endpoints_table, proto,
- lcl_addr, port);
- if (tei != ENDPOINT_INVALID_INDEX)
- return -1;
-
- transport_endpoint_mark_used (proto, lcl_addr, port);
*lcl_port = port;
+
+ return transport_endpoint_mark_used (proto, lcl_addr, port);
}
return 0;
}
-#define SPACER_CPU_TICKS_PER_PERIOD_SHIFT 10
-#define SPACER_CPU_TICKS_PER_PERIOD (1 << SPACER_CPU_TICKS_PER_PERIOD_SHIFT)
+u8 *
+format_clib_us_time (u8 * s, va_list * args)
+{
+ clib_us_time_t t = va_arg (*args, clib_us_time_t);
+ if (t < 1e3)
+ s = format (s, "%u us", t);
+ else
+ s = format (s, "%.3f s", (f64) t * CLIB_US_TIME_PERIOD);
+ return s;
+}
u8 *
format_transport_pacer (u8 * s, va_list * args)
{
spacer_t *pacer = va_arg (*args, spacer_t *);
-
- s = format (s, "bucket %u max_burst %u tokens/period %.3f last_update %x",
- pacer->bucket, pacer->max_burst_size, pacer->tokens_per_period,
- pacer->last_update);
+ u32 thread_index = va_arg (*args, int);
+ clib_us_time_t now, diff;
+
+ now = transport_us_time_now (thread_index);
+ diff = now - pacer->last_update;
+ s = format (s, "rate %lu bucket %ld t/p %.3f last_update %U burst %u",
+ pacer->bytes_per_sec, pacer->bucket, pacer->tokens_per_period,
+ format_clib_us_time, diff, pacer->max_burst);
return s;
}
static inline u32
-spacer_max_burst (spacer_t * pacer, u64 norm_time_now)
+spacer_max_burst (spacer_t * pacer, clib_us_time_t time_now)
{
- u64 n_periods = norm_time_now - pacer->last_update;
- u64 inc;
+ u64 n_periods = (time_now - pacer->last_update);
+ i64 inc;
- if (n_periods > 0 && (inc = n_periods * pacer->tokens_per_period) > 10)
+ if ((inc = (f32) n_periods * pacer->tokens_per_period) > 10)
{
- pacer->last_update = norm_time_now;
- pacer->bucket += inc;
+ pacer->last_update = time_now;
+ pacer->bucket = clib_min (pacer->bucket + inc, (i64) pacer->max_burst);
}
- return clib_min (pacer->bucket, pacer->max_burst_size);
+ return pacer->bucket >= 0 ? pacer->max_burst : 0;
}
static inline void
spacer_update_bucket (spacer_t * pacer, u32 bytes)
{
- ASSERT (pacer->bucket >= bytes);
pacer->bucket -= bytes;
}
static inline void
-spacer_update_max_burst_size (spacer_t * pacer, u32 max_burst_bytes)
+spacer_set_pace_rate (spacer_t * pacer, u64 rate_bytes_per_sec,
+ clib_us_time_t rtt, clib_time_type_t sec_per_loop)
{
- pacer->max_burst_size = clib_max (max_burst_bytes,
- TRANSPORT_PACER_MIN_BURST);
+ clib_us_time_t max_time;
+
+ ASSERT (rate_bytes_per_sec != 0);
+ pacer->bytes_per_sec = rate_bytes_per_sec;
+ pacer->tokens_per_period = rate_bytes_per_sec * CLIB_US_TIME_PERIOD;
+
+ /* Allow a min number of bursts per rtt, if their size is acceptable. Goal
+ * is to spread the sending of data over the rtt but to also allow for some
+ * coalescing that can potentially
+ * 1) reduce load on session layer by reducing scheduling frequency for a
+ * session and
+ * 2) optimize sending when tso if available
+ *
+ * Max "time-length" of a burst cannot be less than 1us or more than 1ms.
+ */
+ max_time = clib_max (rtt / TRANSPORT_PACER_BURSTS_PER_RTT,
+ (clib_us_time_t) (sec_per_loop * CLIB_US_TIME_FREQ));
+ max_time = clib_clamp (max_time, 1 /* 1us */ , 1000 /* 1ms */ );
+ pacer->max_burst = (rate_bytes_per_sec * max_time) * CLIB_US_TIME_PERIOD;
+ pacer->max_burst = clib_clamp (pacer->max_burst, TRANSPORT_PACER_MIN_BURST,
+ TRANSPORT_PACER_MAX_BURST);
+}
+
+static inline u64
+spacer_pace_rate (spacer_t * pacer)
+{
+ return pacer->bytes_per_sec;
}
static inline void
-spacer_set_pace_rate (spacer_t * pacer, u64 rate_bytes_per_sec)
+spacer_reset (spacer_t * pacer, clib_us_time_t time_now, u64 bucket)
{
- ASSERT (rate_bytes_per_sec != 0);
- pacer->tokens_per_period = rate_bytes_per_sec / transport_pacer_period;
+ pacer->last_update = time_now;
+ pacer->bucket = bucket;
}
void
transport_connection_tx_pacer_reset (transport_connection_t * tc,
- u32 rate_bytes_per_sec,
- u32 start_bucket, u64 time_now)
+ u64 rate_bytes_per_sec, u32 start_bucket,
+ clib_us_time_t rtt)
{
- spacer_t *pacer = &tc->pacer;
- f64 dispatch_period;
- u32 burst_size;
+ spacer_set_pace_rate (&tc->pacer, rate_bytes_per_sec, rtt,
+ transport_seconds_per_loop (tc->thread_index));
+ spacer_reset (&tc->pacer, transport_us_time_now (tc->thread_index),
+ start_bucket);
+}
- dispatch_period = transport_dispatch_period (tc->thread_index);
- burst_size = rate_bytes_per_sec * dispatch_period;
- spacer_update_max_burst_size (&tc->pacer, burst_size);
- spacer_set_pace_rate (&tc->pacer, rate_bytes_per_sec);
- pacer->last_update = time_now >> SPACER_CPU_TICKS_PER_PERIOD_SHIFT;
- pacer->bucket = start_bucket;
+void
+transport_connection_tx_pacer_reset_bucket (transport_connection_t * tc,
+ u32 bucket)
+{
+ spacer_reset (&tc->pacer, transport_us_time_now (tc->thread_index), bucket);
}
void
transport_connection_tx_pacer_init (transport_connection_t * tc,
- u32 rate_bytes_per_sec,
+ u64 rate_bytes_per_sec,
u32 initial_bucket)
{
- vlib_main_t *vm = vlib_get_main ();
tc->flags |= TRANSPORT_CONNECTION_F_IS_TX_PACED;
transport_connection_tx_pacer_reset (tc, rate_bytes_per_sec,
- initial_bucket,
- vm->clib_time.last_cpu_time);
+ initial_bucket, 1e6);
}
void
transport_connection_tx_pacer_update (transport_connection_t * tc,
- u64 bytes_per_sec)
+ u64 bytes_per_sec, clib_us_time_t rtt)
{
- f64 dispatch_period = transport_dispatch_period (tc->thread_index);
- u32 burst_size = 1.1 * bytes_per_sec * dispatch_period;
- spacer_set_pace_rate (&tc->pacer, bytes_per_sec);
- spacer_update_max_burst_size (&tc->pacer, burst_size);
+ spacer_set_pace_rate (&tc->pacer, bytes_per_sec, rtt,
+ transport_seconds_per_loop (tc->thread_index));
}
u32
-transport_connection_tx_pacer_burst (transport_connection_t * tc,
- u64 time_now)
+transport_connection_tx_pacer_burst (transport_connection_t * tc)
{
- time_now >>= SPACER_CPU_TICKS_PER_PERIOD_SHIFT;
- return spacer_max_burst (&tc->pacer, time_now);
+ return spacer_max_burst (&tc->pacer,
+ transport_us_time_now (tc->thread_index));
}
-u32
-transport_connection_snd_space (transport_connection_t * tc, u64 time_now,
- u16 mss)
+u64
+transport_connection_tx_pacer_rate (transport_connection_t * tc)
{
- u32 snd_space, max_paced_burst;
-
- snd_space = tp_vfts[tc->proto].send_space (tc);
- if (transport_connection_is_tx_paced (tc))
- {
- time_now >>= SPACER_CPU_TICKS_PER_PERIOD_SHIFT;
- max_paced_burst = spacer_max_burst (&tc->pacer, time_now);
- max_paced_burst = (max_paced_burst < mss) ? 0 : max_paced_burst;
- snd_space = clib_min (snd_space, max_paced_burst);
- snd_space = snd_space - snd_space % mss;
- }
- return snd_space;
+ return spacer_pace_rate (&tc->pacer);
}
void
-transport_connection_update_tx_stats (transport_connection_t * tc, u32 bytes)
+transport_connection_update_tx_bytes (transport_connection_t * tc, u32 bytes)
{
- tc->stats.tx_bytes += bytes;
if (transport_connection_is_tx_paced (tc))
spacer_update_bucket (&tc->pacer, bytes);
}
}
void
-transport_init_tx_pacers_period (void)
+transport_update_pacer_time (u32 thread_index, clib_time_type_t now)
{
- f64 cpu_freq = os_cpu_clock_frequency ();
- transport_pacer_period = cpu_freq / SPACER_CPU_TICKS_PER_PERIOD;
+ session_wrk_update_time (session_main_get_worker (thread_index), now);
}
void
-transport_update_time (f64 time_now, u8 thread_index)
+transport_connection_reschedule (transport_connection_t * tc)
+{
+ tc->flags &= ~TRANSPORT_CONNECTION_F_DESCHED;
+ transport_connection_tx_pacer_reset_bucket (tc, 0 /* bucket */);
+ if (transport_max_tx_dequeue (tc))
+ sesssion_reschedule_tx (tc);
+ else
+ {
+ session_t *s = session_get (tc->s_index, tc->thread_index);
+ svm_fifo_unset_event (s->tx_fifo);
+ if (svm_fifo_max_dequeue_cons (s->tx_fifo))
+ if (svm_fifo_set_event (s->tx_fifo))
+ sesssion_reschedule_tx (tc);
+ }
+}
+
+void
+transport_fifos_init_ooo (transport_connection_t * tc)
+{
+ session_t *s = session_get (tc->s_index, tc->thread_index);
+ svm_fifo_init_ooo_lookup (s->rx_fifo, 0 /* ooo enq */ );
+ svm_fifo_init_ooo_lookup (s->tx_fifo, 1 /* ooo deq */ );
+}
+
+void
+transport_update_time (clib_time_type_t time_now, u8 thread_index)
{
transport_proto_vft_t *vft;
vec_foreach (vft, tp_vfts)
{
if (vft->enable)
(vft->enable) (vm, is_en);
+
+ if (vft->update_time)
+ session_register_update_time_fn (vft->update_time, is_en);
}
}
transport_init (void)
{
vlib_thread_main_t *vtm = vlib_get_thread_main ();
- session_manager_main_t *smm = vnet_get_session_manager_main ();
+ session_main_t *smm = vnet_get_session_main ();
+ transport_main_t *tm = &tp_main;
u32 num_threads;
if (smm->local_endpoints_table_buckets == 0)
smm->local_endpoints_table_memory = 512 << 20;
/* Initialize [port-allocator] random number seed */
- port_allocator_seed = (u32) clib_cpu_time_now ();
+ tm->port_allocator_seed = (u32) clib_cpu_time_now ();
- clib_bihash_init_24_8 (&local_endpoints_table, "local endpoints table",
+ clib_bihash_init_24_8 (&tm->local_endpoints_table, "local endpoints table",
smm->local_endpoints_table_buckets,
smm->local_endpoints_table_memory);
+ clib_spinlock_init (&tm->local_endpoints_lock);
+
num_threads = 1 /* main thread */ + vtm->n_threads;
if (num_threads > 1)
- clib_spinlock_init (&local_endpoints_lock);
+ {
+ /* Main not polled if there are workers */
+ smm->transport_cl_thread = 1;
+ }
}
/*
Code Review / vpp.git / blobdiff