PSARC 2005/082 Yosemite: UDP Performance Enhancement

4796051 Solaris needs a more complete HW checksumming support
4905227 duplicate macros in ipclassifier.h and ip.h
4915681 need hardware checksum offload for the case of IP/UDP reassembly
6201076 outbound flow-control dysfunctional, ip to ce using mdt
6223331 ipv6 flow control may corrupt UDP packets
6223809 16-bit aligned IP header should be allowed for all x86 platforms
6275398 Galaxy hangs when running lmbench
6281836 Yosemite project integration into Solaris
6281885 xge needs to support IPv6 checksum offload
6282776 IPv6 NCE fast path is not created for incoming solicitation
6304890 IP transmit-side checksum logic needs to be tightened
6304902 IP6_IN_NOCKSUM is obsolete and should be torched
6304904 UDP should reject TI_GETPEERNAME for non-connected endpoint
6306768 IP and UDP device and module definitions need to be centralized

1 files changed, 332 insertions, 0 deletions

diff --git a/usr/src/uts/common/inet/tcp_impl.h b/usr/src/uts/common/inet/tcp_impl.h
new file mode 100644
index 0000000000..93c08cb144
--- /dev/null
+++ b/usr/src/uts/common/inet/tcp_impl.h
@@ -0,0 +1,332 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (the "License").  You may not use this file except in compliance
+ * with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef	_INET_TCP_IMPL_H
+#define	_INET_TCP_IMPL_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+/*
+ * TCP implementation private declarations.  These interfaces are
+ * used to build the IP module and are not meant to be accessed
+ * by any modules except IP itself.  They are undocumented and are
+ * subject to change without notice.
+ */
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+#ifdef _KERNEL
+
+#include <inet/tcp.h>
+
+#define	TCP_MOD_ID	5105
+
+/*
+ * Was this tcp created via socket() interface?
+ */
+#define	TCP_IS_SOCKET(tcp)	((tcp)->tcp_issocket)
+
+/*
+ * Is this tcp not attached to any upper client?
+ */
+#define	TCP_IS_DETACHED(tcp)	((tcp)->tcp_detached)
+
+#define	TCP_TIMER(tcp, f, tim)		\
+	tcp_timeout(tcp->tcp_connp, f, tim)
+#define	TCP_TIMER_CANCEL(tcp, id)	\
+	tcp_timeout_cancel(tcp->tcp_connp, id)
+
+/*
+ * To restart the TCP retransmission timer.
+ */
+#define	TCP_TIMER_RESTART(tcp, intvl) {					\
+	if ((tcp)->tcp_timer_tid != 0)					\
+		(void) TCP_TIMER_CANCEL((tcp), (tcp)->tcp_timer_tid);	\
+	(tcp)->tcp_timer_tid = TCP_TIMER((tcp), tcp_timer,		\
+	    MSEC_TO_TICK(intvl));					\
+}
+
+/*
+ * This stops synchronous streams for a fused tcp endpoint
+ * and prevents tcp_rrw() from pulling data from it.
+ */
+#define	TCP_FUSE_SYNCSTR_STOP(tcp) {				\
+	if ((tcp)->tcp_direct_sockfs) {				\
+		mutex_enter(&(tcp)->tcp_fuse_lock);		\
+		(tcp)->tcp_fuse_syncstr_stopped = B_TRUE;	\
+		mutex_exit(&(tcp)->tcp_fuse_lock);		\
+	}							\
+}
+
+/*
+ * This resumes synchronous streams for this fused tcp endpoint
+ * and allows tcp_rrw() to pull data from it again.
+ */
+#define	TCP_FUSE_SYNCSTR_RESUME(tcp) {				\
+	if ((tcp)->tcp_direct_sockfs) {				\
+		mutex_enter(&(tcp)->tcp_fuse_lock);		\
+		(tcp)->tcp_fuse_syncstr_stopped = B_FALSE;	\
+		mutex_exit(&(tcp)->tcp_fuse_lock);		\
+	}							\
+}
+
+/*
+ * Write-side flow-control is implemented via the per instance STREAMS
+ * write-side Q by explicitly setting QFULL to stop the flow of mblk_t(s)
+ * and clearing QFULL and calling qbackenable() to restart the flow based
+ * on the number of TCP unsent bytes (i.e. those not on the wire waiting
+ * for a remote ACK).
+ *
+ * This is different than a standard STREAMS kmod which when using the
+ * STREAMS Q the framework would automatictly flow-control based on the
+ * defined hiwat/lowat values as mblk_t's are enqueued/dequeued.
+ *
+ * As of FireEngine TCP write-side flow-control needs to take into account
+ * both the unsent tcp_xmit list bytes but also any squeue_t enqueued bytes
+ * (i.e. from tcp_wput() -> tcp_output()).
+ *
+ * This is accomplished by adding a new tcp_t fields, tcp_squeue_bytes, to
+ * count the number of bytes enqueued by tcp_wput() and the number of bytes
+ * dequeued and processed by tcp_output().
+ *
+ * So, the total number of bytes unsent is (squeue_bytes + unsent) with all
+ * flow-control uses of unsent replaced with the macro TCP_UNSENT_BYTES.
+ */
+extern void	tcp_clrqfull(tcp_t *);
+extern void	tcp_setqfull(tcp_t *);
+
+#define	TCP_UNSENT_BYTES(tcp) \
+	((tcp)->tcp_squeue_bytes + (tcp)->tcp_unsent)
+
+/* Named Dispatch Parameter Management Structure */
+typedef struct tcpparam_s {
+	uint32_t	tcp_param_min;
+	uint32_t	tcp_param_max;
+	uint32_t	tcp_param_val;
+	char		*tcp_param_name;
+} tcpparam_t;
+
+extern tcpparam_t tcp_param_arr[];
+
+#define	tcp_time_wait_interval			tcp_param_arr[0].tcp_param_val
+#define	tcp_conn_req_max_q			tcp_param_arr[1].tcp_param_val
+#define	tcp_conn_req_max_q0			tcp_param_arr[2].tcp_param_val
+#define	tcp_conn_req_min			tcp_param_arr[3].tcp_param_val
+#define	tcp_conn_grace_period			tcp_param_arr[4].tcp_param_val
+#define	tcp_cwnd_max_				tcp_param_arr[5].tcp_param_val
+#define	tcp_dbg					tcp_param_arr[6].tcp_param_val
+#define	tcp_smallest_nonpriv_port		tcp_param_arr[7].tcp_param_val
+#define	tcp_ip_abort_cinterval			tcp_param_arr[8].tcp_param_val
+#define	tcp_ip_abort_linterval			tcp_param_arr[9].tcp_param_val
+#define	tcp_ip_abort_interval			tcp_param_arr[10].tcp_param_val
+#define	tcp_ip_notify_cinterval			tcp_param_arr[11].tcp_param_val
+#define	tcp_ip_notify_interval			tcp_param_arr[12].tcp_param_val
+#define	tcp_ipv4_ttl				tcp_param_arr[13].tcp_param_val
+#define	tcp_keepalive_interval_high		tcp_param_arr[14].tcp_param_max
+#define	tcp_keepalive_interval			tcp_param_arr[14].tcp_param_val
+#define	tcp_keepalive_interval_low		tcp_param_arr[14].tcp_param_min
+#define	tcp_maxpsz_multiplier			tcp_param_arr[15].tcp_param_val
+#define	tcp_mss_def_ipv4			tcp_param_arr[16].tcp_param_val
+#define	tcp_mss_max_ipv4			tcp_param_arr[17].tcp_param_val
+#define	tcp_mss_min				tcp_param_arr[18].tcp_param_val
+#define	tcp_naglim_def				tcp_param_arr[19].tcp_param_val
+#define	tcp_rexmit_interval_initial		tcp_param_arr[20].tcp_param_val
+#define	tcp_rexmit_interval_max			tcp_param_arr[21].tcp_param_val
+#define	tcp_rexmit_interval_min			tcp_param_arr[22].tcp_param_val
+#define	tcp_deferred_ack_interval		tcp_param_arr[23].tcp_param_val
+#define	tcp_snd_lowat_fraction			tcp_param_arr[24].tcp_param_val
+#define	tcp_sth_rcv_hiwat			tcp_param_arr[25].tcp_param_val
+#define	tcp_sth_rcv_lowat			tcp_param_arr[26].tcp_param_val
+#define	tcp_dupack_fast_retransmit		tcp_param_arr[27].tcp_param_val
+#define	tcp_ignore_path_mtu			tcp_param_arr[28].tcp_param_val
+#define	tcp_smallest_anon_port			tcp_param_arr[29].tcp_param_val
+#define	tcp_largest_anon_port			tcp_param_arr[30].tcp_param_val
+#define	tcp_xmit_hiwat				tcp_param_arr[31].tcp_param_val
+#define	tcp_xmit_lowat				tcp_param_arr[32].tcp_param_val
+#define	tcp_recv_hiwat				tcp_param_arr[33].tcp_param_val
+#define	tcp_recv_hiwat_minmss			tcp_param_arr[34].tcp_param_val
+#define	tcp_fin_wait_2_flush_interval		tcp_param_arr[35].tcp_param_val
+#define	tcp_co_min				tcp_param_arr[36].tcp_param_val
+#define	tcp_max_buf				tcp_param_arr[37].tcp_param_val
+#define	tcp_strong_iss				tcp_param_arr[38].tcp_param_val
+#define	tcp_rtt_updates				tcp_param_arr[39].tcp_param_val
+#define	tcp_wscale_always			tcp_param_arr[40].tcp_param_val
+#define	tcp_tstamp_always			tcp_param_arr[41].tcp_param_val
+#define	tcp_tstamp_if_wscale			tcp_param_arr[42].tcp_param_val
+#define	tcp_rexmit_interval_extra		tcp_param_arr[43].tcp_param_val
+#define	tcp_deferred_acks_max			tcp_param_arr[44].tcp_param_val
+#define	tcp_slow_start_after_idle		tcp_param_arr[45].tcp_param_val
+#define	tcp_slow_start_initial			tcp_param_arr[46].tcp_param_val
+#define	tcp_co_timer_interval			tcp_param_arr[47].tcp_param_val
+#define	tcp_sack_permitted			tcp_param_arr[48].tcp_param_val
+#define	tcp_trace				tcp_param_arr[49].tcp_param_val
+#define	tcp_compression_enabled			tcp_param_arr[50].tcp_param_val
+#define	tcp_ipv6_hoplimit			tcp_param_arr[51].tcp_param_val
+#define	tcp_mss_def_ipv6			tcp_param_arr[52].tcp_param_val
+#define	tcp_mss_max_ipv6			tcp_param_arr[53].tcp_param_val
+#define	tcp_rev_src_routes			tcp_param_arr[54].tcp_param_val
+#define	tcp_local_dack_interval			tcp_param_arr[55].tcp_param_val
+#define	tcp_ndd_get_info_interval		tcp_param_arr[56].tcp_param_val
+#define	tcp_local_dacks_max			tcp_param_arr[57].tcp_param_val
+#define	tcp_ecn_permitted			tcp_param_arr[58].tcp_param_val
+#define	tcp_rst_sent_rate_enabled		tcp_param_arr[59].tcp_param_val
+#define	tcp_rst_sent_rate			tcp_param_arr[60].tcp_param_val
+#define	tcp_push_timer_interval			tcp_param_arr[61].tcp_param_val
+#define	tcp_use_smss_as_mss_opt			tcp_param_arr[62].tcp_param_val
+#define	tcp_keepalive_abort_interval_high	tcp_param_arr[63].tcp_param_max
+#define	tcp_keepalive_abort_interval		tcp_param_arr[63].tcp_param_val
+#define	tcp_keepalive_abort_interval_low	tcp_param_arr[63].tcp_param_min
+
+/* Kstats */
+typedef struct tcp_stat {
+	kstat_named_t	tcp_time_wait;
+	kstat_named_t	tcp_time_wait_syn;
+	kstat_named_t	tcp_time_wait_syn_success;
+	kstat_named_t	tcp_time_wait_syn_fail;
+	kstat_named_t	tcp_reinput_syn;
+	kstat_named_t	tcp_ip_output;
+	kstat_named_t	tcp_detach_non_time_wait;
+	kstat_named_t	tcp_detach_time_wait;
+	kstat_named_t	tcp_time_wait_reap;
+	kstat_named_t	tcp_clean_death_nondetached;
+	kstat_named_t	tcp_reinit_calls;
+	kstat_named_t	tcp_eager_err1;
+	kstat_named_t	tcp_eager_err2;
+	kstat_named_t	tcp_eager_blowoff_calls;
+	kstat_named_t	tcp_eager_blowoff_q;
+	kstat_named_t	tcp_eager_blowoff_q0;
+	kstat_named_t	tcp_not_hard_bound;
+	kstat_named_t	tcp_no_listener;
+	kstat_named_t	tcp_found_eager;
+	kstat_named_t	tcp_wrong_queue;
+	kstat_named_t	tcp_found_eager_binding1;
+	kstat_named_t	tcp_found_eager_bound1;
+	kstat_named_t	tcp_eager_has_listener1;
+	kstat_named_t	tcp_open_alloc;
+	kstat_named_t	tcp_open_detached_alloc;
+	kstat_named_t	tcp_rput_time_wait;
+	kstat_named_t	tcp_listendrop;
+	kstat_named_t	tcp_listendropq0;
+	kstat_named_t	tcp_wrong_rq;
+	kstat_named_t	tcp_rsrv_calls;
+	kstat_named_t	tcp_eagerfree2;
+	kstat_named_t	tcp_eagerfree3;
+	kstat_named_t	tcp_eagerfree4;
+	kstat_named_t	tcp_eagerfree5;
+	kstat_named_t	tcp_timewait_syn_fail;
+	kstat_named_t	tcp_listen_badflags;
+	kstat_named_t	tcp_timeout_calls;
+	kstat_named_t	tcp_timeout_cached_alloc;
+	kstat_named_t	tcp_timeout_cancel_reqs;
+	kstat_named_t	tcp_timeout_canceled;
+	kstat_named_t	tcp_timermp_alloced;
+	kstat_named_t	tcp_timermp_freed;
+	kstat_named_t	tcp_timermp_allocfail;
+	kstat_named_t	tcp_timermp_allocdblfail;
+	kstat_named_t	tcp_push_timer_cnt;
+	kstat_named_t	tcp_ack_timer_cnt;
+	kstat_named_t	tcp_ire_null1;
+	kstat_named_t	tcp_ire_null;
+	kstat_named_t	tcp_ip_send;
+	kstat_named_t	tcp_ip_ire_send;
+	kstat_named_t   tcp_wsrv_called;
+	kstat_named_t   tcp_flwctl_on;
+	kstat_named_t	tcp_timer_fire_early;
+	kstat_named_t	tcp_timer_fire_miss;
+	kstat_named_t	tcp_freelist_cleanup;
+	kstat_named_t	tcp_rput_v6_error;
+	kstat_named_t	tcp_out_sw_cksum;
+	kstat_named_t	tcp_out_sw_cksum_bytes;
+	kstat_named_t	tcp_zcopy_on;
+	kstat_named_t	tcp_zcopy_off;
+	kstat_named_t	tcp_zcopy_backoff;
+	kstat_named_t	tcp_zcopy_disable;
+	kstat_named_t	tcp_mdt_pkt_out;
+	kstat_named_t	tcp_mdt_pkt_out_v4;
+	kstat_named_t	tcp_mdt_pkt_out_v6;
+	kstat_named_t	tcp_mdt_discarded;
+	kstat_named_t	tcp_mdt_conn_halted1;
+	kstat_named_t	tcp_mdt_conn_halted2;
+	kstat_named_t	tcp_mdt_conn_halted3;
+	kstat_named_t	tcp_mdt_conn_resumed1;
+	kstat_named_t	tcp_mdt_conn_resumed2;
+	kstat_named_t	tcp_mdt_legacy_small;
+	kstat_named_t	tcp_mdt_legacy_all;
+	kstat_named_t	tcp_mdt_legacy_ret;
+	kstat_named_t	tcp_mdt_allocfail;
+	kstat_named_t	tcp_mdt_addpdescfail;
+	kstat_named_t	tcp_mdt_allocd;
+	kstat_named_t	tcp_mdt_linked;
+	kstat_named_t	tcp_fusion_flowctl;
+	kstat_named_t	tcp_fusion_backenabled;
+	kstat_named_t	tcp_fusion_urg;
+	kstat_named_t	tcp_fusion_putnext;
+	kstat_named_t	tcp_fusion_unfusable;
+	kstat_named_t	tcp_fusion_aborted;
+	kstat_named_t	tcp_fusion_unqualified;
+	kstat_named_t	tcp_fusion_rrw_busy;
+	kstat_named_t	tcp_fusion_rrw_msgcnt;
+	kstat_named_t	tcp_in_ack_unsent_drop;
+	kstat_named_t	tcp_sock_fallback;
+} tcp_stat_t;
+
+extern tcp_stat_t tcp_statistics;
+
+#define	TCP_STAT(x)		(tcp_statistics.x.value.ui64++)
+#define	TCP_STAT_UPDATE(x, n)	(tcp_statistics.x.value.ui64 += (n))
+#define	TCP_STAT_SET(x, n)	(tcp_statistics.x.value.ui64 = (n))
+
+extern struct qinit tcp_loopback_rinit, tcp_rinit;
+extern boolean_t do_tcp_fusion;
+
+extern int	tcp_maxpsz_set(tcp_t *, boolean_t);
+extern void	tcp_timers_stop(tcp_t *);
+extern void	tcp_rcv_enqueue(tcp_t *, mblk_t *, uint_t);
+extern void	tcp_push_timer(void *);
+extern timeout_id_t tcp_timeout(conn_t *, void (*)(void *), clock_t);
+extern clock_t	tcp_timeout_cancel(conn_t *, timeout_id_t);
+
+extern void	tcp_fuse(tcp_t *, uchar_t *, tcph_t *);
+extern void	tcp_unfuse(tcp_t *);
+extern boolean_t tcp_fuse_output(tcp_t *, mblk_t *, uint32_t);
+extern void	tcp_fuse_output_urg(tcp_t *, mblk_t *);
+extern boolean_t tcp_fuse_rcv_drain(queue_t *, tcp_t *, mblk_t **);
+extern void	tcp_fuse_syncstr_enable_pair(tcp_t *);
+extern void	tcp_fuse_disable_pair(tcp_t *, boolean_t);
+extern int	tcp_fuse_rrw(queue_t *, struiod_t *);
+extern int	tcp_fuse_rinfop(queue_t *, infod_t *);
+extern size_t	tcp_fuse_set_rcv_hiwat(tcp_t *, size_t);
+extern int	tcp_fuse_maxpsz_set(tcp_t *);
+
+#endif	/* _KERNEL */
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _INET_TCP_IMPL_H */