sctp_tunables.c revision 299625c6492013aa7bd163862f0d181854f69b3c
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (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 (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2013 by Delphix. All rights reserved.
*/
#include <inet/ip.h>
#include <inet/ip6.h>
#include <inet/sctp/sctp_stack.h>
#include <inet/sctp/sctp_impl.h>
#include <sys/sunddi.h>
/* Max size IP datagram is 64k - 1 */
#define SCTP_MSS_MAX_IPV4 (IP_MAXPACKET - (sizeof (ipha_t) + \
sizeof (sctp_hdr_t)))
#define SCTP_MSS_MAX_IPV6 (IP_MAXPACKET - (sizeof (ip6_t) + \
sizeof (sctp_hdr_t)))
/* Max of the above */
#define SCTP_MSS_MAX SCTP_MSS_MAX_IPV4
/*
* returns the current list of listener limit configuration.
*/
/* ARGSUSED */
static int
sctp_listener_conf_get(netstack_t *stack, mod_prop_info_t *pinfo,
const char *ifname, void *val, uint_t psize, uint_t flags)
{
sctp_stack_t *sctps = stack->netstack_sctp;
sctp_listener_t *sl;
char *pval = val;
size_t nbytes = 0, tbytes = 0;
uint_t size;
int err = 0;
bzero(pval, psize);
size = psize;
if (flags & (MOD_PROP_DEFAULT|MOD_PROP_PERM|MOD_PROP_POSSIBLE))
return (0);
mutex_enter(&sctps->sctps_listener_conf_lock);
for (sl = list_head(&sctps->sctps_listener_conf); sl != NULL;
sl = list_next(&sctps->sctps_listener_conf, sl)) {
if (psize == size)
nbytes = snprintf(pval, size, "%d:%d", sl->sl_port,
sl->sl_ratio);
else
nbytes = snprintf(pval, size, ",%d:%d", sl->sl_port,
sl->sl_ratio);
size -= nbytes;
pval += nbytes;
tbytes += nbytes;
if (tbytes >= psize) {
/* Buffer overflow, stop copying information */
err = ENOBUFS;
break;
}
}
mutex_exit(&sctps->sctps_listener_conf_lock);
return (err);
}
/*
* add a new listener limit configuration.
*/
/* ARGSUSED */
static int
sctp_listener_conf_add(netstack_t *stack, cred_t *cr, mod_prop_info_t *pinfo,
const char *ifname, const void* pval, uint_t flags)
{
sctp_listener_t *new_sl;
sctp_listener_t *sl;
long lport;
long ratio;
char *colon;
sctp_stack_t *sctps = stack->netstack_sctp;
if (flags & MOD_PROP_DEFAULT)
return (ENOTSUP);
if (ddi_strtol(pval, &colon, 10, &lport) != 0 || lport <= 0 ||
lport > USHRT_MAX || *colon != ':') {
return (EINVAL);
}
if (ddi_strtol(colon + 1, NULL, 10, &ratio) != 0 || ratio <= 0)
return (EINVAL);
mutex_enter(&sctps->sctps_listener_conf_lock);
for (sl = list_head(&sctps->sctps_listener_conf); sl != NULL;
sl = list_next(&sctps->sctps_listener_conf, sl)) {
/* There is an existing entry, so update its ratio value. */
if (sl->sl_port == lport) {
sl->sl_ratio = ratio;
mutex_exit(&sctps->sctps_listener_conf_lock);
return (0);
}
}
if ((new_sl = kmem_alloc(sizeof (sctp_listener_t), KM_NOSLEEP)) ==
NULL) {
mutex_exit(&sctps->sctps_listener_conf_lock);
return (ENOMEM);
}
new_sl->sl_port = lport;
new_sl->sl_ratio = ratio;
list_insert_tail(&sctps->sctps_listener_conf, new_sl);
mutex_exit(&sctps->sctps_listener_conf_lock);
return (0);
}
/*
* remove a listener limit configuration.
*/
/* ARGSUSED */
static int
sctp_listener_conf_del(netstack_t *stack, cred_t *cr, mod_prop_info_t *pinfo,
const char *ifname, const void* pval, uint_t flags)
{
sctp_listener_t *sl;
long lport;
sctp_stack_t *sctps = stack->netstack_sctp;
if (flags & MOD_PROP_DEFAULT)
return (ENOTSUP);
if (ddi_strtol(pval, NULL, 10, &lport) != 0 || lport <= 0 ||
lport > USHRT_MAX) {
return (EINVAL);
}
mutex_enter(&sctps->sctps_listener_conf_lock);
for (sl = list_head(&sctps->sctps_listener_conf); sl != NULL;
sl = list_next(&sctps->sctps_listener_conf, sl)) {
if (sl->sl_port == lport) {
list_remove(&sctps->sctps_listener_conf, sl);
mutex_exit(&sctps->sctps_listener_conf_lock);
kmem_free(sl, sizeof (sctp_listener_t));
return (0);
}
}
mutex_exit(&sctps->sctps_listener_conf_lock);
return (ESRCH);
}
static int
sctp_set_buf_prop(netstack_t *stack, cred_t *cr, mod_prop_info_t *pinfo,
const char *ifname, const void *pval, uint_t flags)
{
return (mod_set_buf_prop(stack->netstack_sctp->sctps_propinfo_tbl,
stack, cr, pinfo, ifname, pval, flags));
}
static int
sctp_get_buf_prop(netstack_t *stack, mod_prop_info_t *pinfo, const char *ifname,
void *val, uint_t psize, uint_t flags)
{
return (mod_get_buf_prop(stack->netstack_sctp->sctps_propinfo_tbl,
stack, pinfo, ifname, val, psize, flags));
}
/*
* All of these are alterable, within the min/max values given, at run time.
*
* Note: All those tunables which do not start with "_" are Committed and
* therefore are public. See PSARC 2010/080.
*/
mod_prop_info_t sctp_propinfo_tbl[] = {
{ "_max_init_retr", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{0, 128, 8}, {8} },
{ "_pa_max_retr", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{1, 128, 10}, {10} },
{ "_pp_max_retr", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{1, 128, 5}, {5} },
{ "_cwnd_max", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{128, ULP_MAX_BUF, 1024*1024}, {1024*1024} },
{ "smallest_nonpriv_port", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{1024, (32*1024), 1024}, {1024} },
{ "_ipv4_ttl", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{1, 255, 64}, {64} },
{ "_heartbeat_interval", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{0, 1*DAYS, 30*SECONDS}, {30*SECONDS} },
{ "_initial_mtu", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{68, 65535, 1500}, {1500} },
{ "_mtu_probe_interval", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{0, 1*DAYS, 10*MINUTES}, {10*MINUTES} },
{ "_new_secret_interval", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{0, 1*DAYS, 2*MINUTES}, {2*MINUTES} },
/* tunable - 10 */
{ "_deferred_ack_interval", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{10*MS, 1*MINUTES, 100*MS}, {100*MS} },
{ "_snd_lowat_fraction", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{0, 16, 0}, {0} },
{ "_ignore_path_mtu", MOD_PROTO_SCTP,
mod_set_boolean, mod_get_boolean,
{B_FALSE}, {B_FALSE} },
{ "_initial_ssthresh", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{1024, UINT32_MAX, SCTP_RECV_HIWATER}, { SCTP_RECV_HIWATER} },
{ "smallest_anon_port", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{1024, ULP_MAX_PORT, 32*1024}, {32*1024} },
{ "largest_anon_port", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{1024, ULP_MAX_PORT, ULP_MAX_PORT}, {ULP_MAX_PORT} },
{ "send_buf", MOD_PROTO_SCTP,
sctp_set_buf_prop, sctp_get_buf_prop,
{SCTP_XMIT_LOWATER, ULP_MAX_BUF, SCTP_XMIT_HIWATER},
{SCTP_XMIT_HIWATER} },
{ "_xmit_lowat", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{SCTP_XMIT_LOWATER, ULP_MAX_BUF, SCTP_XMIT_LOWATER},
{SCTP_XMIT_LOWATER} },
{ "recv_buf", MOD_PROTO_SCTP,
sctp_set_buf_prop, sctp_get_buf_prop,
{SCTP_RECV_LOWATER, ULP_MAX_BUF, SCTP_RECV_HIWATER},
{SCTP_RECV_HIWATER} },
{ "max_buf", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{8192, ULP_MAX_BUF, 1024*1024}, {1024*1024} },
/* tunable - 20 */
{ "_rtt_updates", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{0, 65536, 20}, {20} },
{ "_ipv6_hoplimit", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{0, IPV6_MAX_HOPS, IPV6_DEFAULT_HOPS}, {IPV6_DEFAULT_HOPS} },
{ "_rto_min", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{500*MS, 60*SECONDS, 1*SECONDS}, {1*SECONDS} },
{ "_rto_max", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{1*SECONDS, 60000*SECONDS, 60*SECONDS}, {60*SECONDS} },
{ "_rto_initial", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{1*SECONDS, 60000*SECONDS, 3*SECONDS}, {3*SECONDS} },
{ "_cookie_life", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{10*MS, 60000*SECONDS, 60*SECONDS}, {60*SECONDS} },
{ "_max_in_streams", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{1, UINT16_MAX, 32}, {32} },
{ "_initial_out_streams", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{1, UINT16_MAX, 32}, {32} },
{ "_shutack_wait_bound", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{0, 300*SECONDS, 60*SECONDS}, {60*SECONDS} },
{ "_maxburst", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{2, 8, 4}, {4} },
/* tunable - 30 */
{ "_addip_enabled", MOD_PROTO_SCTP,
mod_set_boolean, mod_get_boolean,
{B_FALSE}, {B_FALSE} },
{ "_recv_hiwat_minmss", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{1, 65536, 4}, {4} },
{ "_slow_start_initial", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{1, 16, 4}, {4} },
{ "_slow_start_after_idle", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{1, 16384, 4}, {4} },
{ "_prsctp_enabled", MOD_PROTO_SCTP,
mod_set_boolean, mod_get_boolean,
{B_TRUE}, {B_TRUE} },
{ "_fast_rxt_thresh", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{1, 10000, 3}, {3} },
{ "_deferred_acks_max", MOD_PROTO_SCTP,
mod_set_uint32, mod_get_uint32,
{ 1, 16, 2}, {2} },
/*
* sctp_wroff_xtra is the extra space in front of SCTP/IP header
* for link layer header. It has to be a multiple of 8.
*/
{ "_wroff_xtra", MOD_PROTO_SCTP,
mod_set_aligned, mod_get_uint32,
{0, 256, 32}, {32} },
{ "extra_priv_ports", MOD_PROTO_SCTP,
mod_set_extra_privports, mod_get_extra_privports,
{1, ULP_MAX_PORT, 0}, {0} },
{ "_listener_limit_conf", MOD_PROTO_SCTP,
NULL, sctp_listener_conf_get, {0}, {0} },
{ "_listener_limit_conf_add", MOD_PROTO_SCTP,
sctp_listener_conf_add, NULL, {0}, {0} },
{ "_listener_limit_conf_del", MOD_PROTO_SCTP,
sctp_listener_conf_del, NULL, {0}, {0} },
{ "?", MOD_PROTO_SCTP, NULL, mod_get_allprop, {0}, {0} },
{ NULL, 0, NULL, NULL, {0}, {0} }
};
int sctp_propinfo_count = A_CNT(sctp_propinfo_tbl);