inet/udp/udp_tunables.c

6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail/*
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * CDDL HEADER START
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail *
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * The contents of this file are subject to the terms of the
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * Common Development and Distribution License (the "License").
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * You may not use this file except in compliance with the License.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail *
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * or http://www.opensolaris.org/os/licensing.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * See the License for the specific language governing permissions
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * and limitations under the License.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail *
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * When distributing Covered Code, include this CDDL HEADER in each
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * If applicable, add the following below this CDDL HEADER, with the
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * fields enclosed by brackets "[]" replaced with your own identifying
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * information: Portions Copyright [yyyy] [name of copyright owner]
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail *
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * CDDL HEADER END
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail */
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail/*
8887b57dc579de11464fc6c74163d2595ce073afGirish Moodalbail * Copyright (c) 1991, 2010, Oracle and/or its affiliates. All rights reserved.
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald * Copyright 2013 Nexenta Systems, Inc.  All rights reserved.
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy * Copyright (c) 2013 by Delphix. All rights reserved.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail */
8887b57dc579de11464fc6c74163d2595ce073afGirish Moodalbail/* Copyright (c) 1990 Mentat Inc. */
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail#include <inet/ip.h>
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail#include <inet/ip6.h>
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail#include <inet/udp_impl.h>
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail#include <sys/sunddi.h>
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roystatic int
299625c6492013aa7bd163862f0d181854f69b3cSebastien Royudp_set_buf_prop(netstack_t *stack, cred_t *cr, mod_prop_info_t *pinfo,
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy    const char *ifname, const void *pval, uint_t flags)
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy{
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy    return (mod_set_buf_prop(stack->netstack_udp->us_propinfo_tbl, stack,
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy        cr, pinfo, ifname, pval, flags));
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy}
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roystatic int
299625c6492013aa7bd163862f0d181854f69b3cSebastien Royudp_get_buf_prop(netstack_t *stack, mod_prop_info_t *pinfo, const char *ifname,
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy    void *val, uint_t psize, uint_t flags)
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy{
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy    return (mod_get_buf_prop(stack->netstack_udp->us_propinfo_tbl, stack,
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy        pinfo, ifname, val, psize, flags));
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy}
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald/*
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald * Special checkers for smallest/largest anonymous port so they don't
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald * ever happen to be (largest < smallest).
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald */
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald/* ARGSUSED */
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonaldstatic int
299625c6492013aa7bd163862f0d181854f69b3cSebastien Royudp_smallest_anon_set(netstack_t *stack, cred_t *cr, mod_prop_info_t *pinfo,
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald    const char *ifname, const void *pval, uint_t flags)
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald{
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald    unsigned long new_value;
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy    udp_stack_t *us = stack->netstack_udp;
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald    int err;
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald    if ((err = mod_uint32_value(pval, pinfo, flags, &new_value)) != 0)
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald        return (err);
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald    /* mod_uint32_value() + pinfo guarantees we're in UDP port range. */
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald    if (new_value > us->us_largest_anon_port)
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald        return (ERANGE);
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald    pinfo->prop_cur_uval = (uint32_t)new_value;
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald    return (0);
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald}
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald/* ARGSUSED */
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonaldstatic int
299625c6492013aa7bd163862f0d181854f69b3cSebastien Royudp_largest_anon_set(netstack_t *stack, cred_t *cr, mod_prop_info_t *pinfo,
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald    const char *ifname, const void *pval, uint_t flags)
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald{
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald    unsigned long new_value;
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy    udp_stack_t *us = stack->netstack_udp;
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald    int err;
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald    if ((err = mod_uint32_value(pval, pinfo, flags, &new_value)) != 0)
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald        return (err);
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald    /* mod_uint32_value() + pinfo guarantees we're in UDP port range. */
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald    if (new_value < us->us_smallest_anon_port)
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald        return (ERANGE);
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald    pinfo->prop_cur_uval = (uint32_t)new_value;
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald    return (0);
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald}
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail/*
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail * All of these are alterable, within the min/max values given, at run time.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail *
8887b57dc579de11464fc6c74163d2595ce073afGirish Moodalbail * Note: All those tunables which do not start with "_" are Committed and
8887b57dc579de11464fc6c74163d2595ce073afGirish Moodalbail * therefore are public. See PSARC 2010/080.
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail */
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbailmod_prop_info_t udp_propinfo_tbl[] = {
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail    /* tunable - 0 */
8887b57dc579de11464fc6c74163d2595ce073afGirish Moodalbail    { "_wroff_extra", MOD_PROTO_UDP,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        mod_set_uint32, mod_get_uint32,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        {0, 256, 32}, {32} },
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail
8887b57dc579de11464fc6c74163d2595ce073afGirish Moodalbail    { "_ipv4_ttl", MOD_PROTO_UDP,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        mod_set_uint32, mod_get_uint32,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        {1, 255, 255}, {255} },
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail
8887b57dc579de11464fc6c74163d2595ce073afGirish Moodalbail    { "_ipv6_hoplimit", MOD_PROTO_UDP,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        mod_set_uint32, mod_get_uint32,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        {0, IPV6_MAX_HOPS, IPV6_DEFAULT_HOPS}, {IPV6_DEFAULT_HOPS} },
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail    { "smallest_nonpriv_port", MOD_PROTO_UDP,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        mod_set_uint32, mod_get_uint32,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        {1024, (32 * 1024), 1024}, {1024} },
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail
8887b57dc579de11464fc6c74163d2595ce073afGirish Moodalbail    { "_do_checksum", MOD_PROTO_UDP,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        mod_set_boolean, mod_get_boolean,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        {B_TRUE}, {B_TRUE} },
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail    { "smallest_anon_port", MOD_PROTO_UDP,
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald        udp_smallest_anon_set, mod_get_uint32,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        {1024, ULP_MAX_PORT, (32 * 1024)}, {(32 * 1024)} },
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail    { "largest_anon_port", MOD_PROTO_UDP,
7256a34efe9df75b638b9e812912ef7c5c68e208Dan McDonald        udp_largest_anon_set, mod_get_uint32,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        {1024, ULP_MAX_PORT, ULP_MAX_PORT}, {ULP_MAX_PORT} },
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy    { "send_buf", MOD_PROTO_UDP,
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy        udp_set_buf_prop, udp_get_buf_prop,
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy        {UDP_XMIT_LOWATER, ULP_MAX_BUF, UDP_XMIT_HIWATER},
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        {UDP_XMIT_HIWATER} },
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail
8887b57dc579de11464fc6c74163d2595ce073afGirish Moodalbail    { "_xmit_lowat", MOD_PROTO_UDP,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        mod_set_uint32, mod_get_uint32,
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy        {0, ULP_MAX_BUF, UDP_XMIT_LOWATER},
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        {UDP_XMIT_LOWATER} },
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy    { "recv_buf", MOD_PROTO_UDP,
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy        udp_set_buf_prop, udp_get_buf_prop,
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy        {UDP_RECV_LOWATER, ULP_MAX_BUF, UDP_RECV_HIWATER},
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        {UDP_RECV_HIWATER} },
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail    /* tunable - 10 */
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy    { "max_buf", MOD_PROTO_UDP,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        mod_set_uint32, mod_get_uint32,
299625c6492013aa7bd163862f0d181854f69b3cSebastien Roy        {65536, ULP_MAX_BUF, 2*1024*1024}, {2*1024*1024} },
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail
8887b57dc579de11464fc6c74163d2595ce073afGirish Moodalbail    { "_pmtu_discovery", MOD_PROTO_UDP,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        mod_set_boolean, mod_get_boolean,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        {B_FALSE}, {B_FALSE} },
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail
8887b57dc579de11464fc6c74163d2595ce073afGirish Moodalbail    { "_sendto_ignerr", MOD_PROTO_UDP,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        mod_set_boolean, mod_get_boolean,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        {B_FALSE}, {B_FALSE} },
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail    { "extra_priv_ports", MOD_PROTO_UDP,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        mod_set_extra_privports, mod_get_extra_privports,
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail        {1, ULP_MAX_PORT, 0}, {0} },
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail    { "?", MOD_PROTO_UDP, NULL, mod_get_allprop, {0}, {0} },
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail    { NULL, 0, NULL, NULL, {0}, {0} }
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail};
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbail
6e91bba0d6c6bdabbba62cefae583715a4a58e2aGirish Moodalbailint udp_propinfo_count = A_CNT(udp_propinfo_tbl);