kernel/net/sctp/sctp_tunables.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Copyright (c) 2013 by Delphix. All rights reserved.
  25  */
  26
  27 #include <inet/ip.h>
  28 #include <inet/ip6.h>
  29 #include <inet/sctp/sctp_stack.h>
  30 #include <inet/sctp/sctp_impl.h>
  31 #include <sys/sunddi.h>
  32
  33 /* Max size IP datagram is 64k - 1 */
  34 #define SCTP_MSS_MAX_IPV4 (IP_MAXPACKET - (sizeof (ipha_t) + \
  35                                         sizeof (sctp_hdr_t)))
  36 #define SCTP_MSS_MAX_IPV6 (IP_MAXPACKET - (sizeof (ip6_t) + \
  37                                         sizeof (sctp_hdr_t)))
  38 /* Max of the above */
  39 #define SCTP_MSS_MAX    SCTP_MSS_MAX_IPV4
  40
  41 /*
  42  * returns the current list of listener limit configuration.
  43  */
  44 /* ARGSUSED */
  45 static int
  46 sctp_listener_conf_get(netstack_t *stack, mod_prop_info_t *pinfo,
  47     const char *ifname, void *val, uint_t psize, uint_t flags)
  48 {
  49         sctp_stack_t    *sctps = stack->netstack_sctp;
  50         sctp_listener_t *sl;
  51         char            *pval = val;
  52         size_t          nbytes = 0, tbytes = 0;
  53         uint_t          size;
  54         int             err = 0;
  55
  56         bzero(pval, psize);
  57         size = psize;
  58
  59         if (flags & (MOD_PROP_DEFAULT|MOD_PROP_PERM|MOD_PROP_POSSIBLE))
  60                 return (0);
  61
  62         mutex_enter(&sctps->sctps_listener_conf_lock);
  63         for (sl = list_head(&sctps->sctps_listener_conf); sl != NULL;
  64             sl = list_next(&sctps->sctps_listener_conf, sl)) {
  65                 if (psize == size)
  66                         nbytes = snprintf(pval, size, "%d:%d",  sl->sl_port,
  67                             sl->sl_ratio);
  68                 else
  69                         nbytes = snprintf(pval, size, ",%d:%d",  sl->sl_port,
  70                             sl->sl_ratio);
  71                 size -= nbytes;
  72                 pval += nbytes;
  73                 tbytes += nbytes;
  74                 if (tbytes >= psize) {
  75                         /* Buffer overflow, stop copying information */
  76                         err = ENOBUFS;
  77                         break;
  78                 }
  79         }
  80
  81         mutex_exit(&sctps->sctps_listener_conf_lock);
  82         return (err);
  83 }
  84
  85 /*
  86  * add a new listener limit configuration.
  87  */
  88 /* ARGSUSED */
  89 static int
  90 sctp_listener_conf_add(netstack_t *stack, cred_t *cr, mod_prop_info_t *pinfo,
  91     const char *ifname, const void* pval, uint_t flags)
  92 {
  93         sctp_listener_t *new_sl;
  94         sctp_listener_t *sl;
  95         long            lport;
  96         long            ratio;
  97         char            *colon;
  98         sctp_stack_t    *sctps = stack->netstack_sctp;
  99
 100         if (flags & MOD_PROP_DEFAULT)
 101                 return (ENOTSUP);
 102
 103         if (ddi_strtol(pval, &colon, 10, &lport) != 0 || lport <= 0 ||
 104             lport > USHRT_MAX || *colon != ':') {
 105                 return (EINVAL);
 106         }
 107         if (ddi_strtol(colon + 1, NULL, 10, &ratio) != 0 || ratio <= 0)
 108                 return (EINVAL);
 109
 110         mutex_enter(&sctps->sctps_listener_conf_lock);
 111         for (sl = list_head(&sctps->sctps_listener_conf); sl != NULL;
 112             sl = list_next(&sctps->sctps_listener_conf, sl)) {
 113                 /* There is an existing entry, so update its ratio value. */
 114                 if (sl->sl_port == lport) {
 115                         sl->sl_ratio = ratio;
 116                         mutex_exit(&sctps->sctps_listener_conf_lock);
 117                         return (0);
 118                 }
 119         }
 120
 121         if ((new_sl = kmem_alloc(sizeof (sctp_listener_t), KM_NOSLEEP)) ==
 122             NULL) {
 123                 mutex_exit(&sctps->sctps_listener_conf_lock);
 124                 return (ENOMEM);
 125         }
 126
 127         new_sl->sl_port = lport;
 128         new_sl->sl_ratio = ratio;
 129         list_insert_tail(&sctps->sctps_listener_conf, new_sl);
 130         mutex_exit(&sctps->sctps_listener_conf_lock);
 131         return (0);
 132 }
 133
 134 /*
 135  * remove a listener limit configuration.
 136  */
 137 /* ARGSUSED */
 138 static int
 139 sctp_listener_conf_del(netstack_t *stack, cred_t *cr, mod_prop_info_t *pinfo,
 140     const char *ifname, const void* pval, uint_t flags)
 141 {
 142         sctp_listener_t *sl;
 143         long            lport;
 144         sctp_stack_t    *sctps = stack->netstack_sctp;
 145
 146         if (flags & MOD_PROP_DEFAULT)
 147                 return (ENOTSUP);
 148
 149         if (ddi_strtol(pval, NULL, 10, &lport) != 0 || lport <= 0 ||
 150             lport > USHRT_MAX) {
 151                 return (EINVAL);
 152         }
 153         mutex_enter(&sctps->sctps_listener_conf_lock);
 154         for (sl = list_head(&sctps->sctps_listener_conf); sl != NULL;
 155             sl = list_next(&sctps->sctps_listener_conf, sl)) {
 156                 if (sl->sl_port == lport) {
 157                         list_remove(&sctps->sctps_listener_conf, sl);
 158                         mutex_exit(&sctps->sctps_listener_conf_lock);
 159                         kmem_free(sl, sizeof (sctp_listener_t));
 160                         return (0);
 161                 }
 162         }
 163         mutex_exit(&sctps->sctps_listener_conf_lock);
 164         return (ESRCH);
 165 }
 166
 167 static int
 168 sctp_set_buf_prop(netstack_t *stack, cred_t *cr, mod_prop_info_t *pinfo,
 169     const char *ifname, const void *pval, uint_t flags)
 170 {
 171         return (mod_set_buf_prop(stack->netstack_sctp->sctps_propinfo_tbl,
 172             stack, cr, pinfo, ifname, pval, flags));
 173 }
 174
 175 static int
 176 sctp_get_buf_prop(netstack_t *stack, mod_prop_info_t *pinfo, const char *ifname,
 177     void *val, uint_t psize, uint_t flags)
 178 {
 179         return (mod_get_buf_prop(stack->netstack_sctp->sctps_propinfo_tbl,
 180             stack, pinfo, ifname, val, psize, flags));
 181 }
 182
 183 /*
 184  * All of these are alterable, within the min/max values given, at run time.
 185  *
 186  * Note: All those tunables which do not start with "_" are Committed and
 187  * therefore are public. See PSARC 2010/080.
 188  */
 189 mod_prop_info_t sctp_propinfo_tbl[] = {
 190         { "_max_init_retr", MOD_PROTO_SCTP,
 191             mod_set_uint32, mod_get_uint32,
 192             {0, 128, 8}, {8} },
 193
 194         { "_pa_max_retr", MOD_PROTO_SCTP,
 195             mod_set_uint32, mod_get_uint32,
 196             {1, 128, 10}, {10} },
 197
 198         { "_pp_max_retr", MOD_PROTO_SCTP,
 199             mod_set_uint32, mod_get_uint32,
 200             {1, 128, 5}, {5} },
 201
 202         { "_cwnd_max", MOD_PROTO_SCTP,
 203             mod_set_uint32, mod_get_uint32,
 204             {128, ULP_MAX_BUF, 1024*1024}, {1024*1024} },
 205
 206         { "smallest_nonpriv_port", MOD_PROTO_SCTP,
 207             mod_set_uint32, mod_get_uint32,
 208             {1024, (32*1024), 1024}, {1024} },
 209
 210         { "_ipv4_ttl", MOD_PROTO_SCTP,
 211             mod_set_uint32, mod_get_uint32,
 212             {1, 255, 64}, {64} },
 213
 214         { "_heartbeat_interval", MOD_PROTO_SCTP,
 215             mod_set_uint32, mod_get_uint32,
 216             {0, 1*DAYS, 30*SECONDS}, {30*SECONDS} },
 217
 218         { "_initial_mtu", MOD_PROTO_SCTP,
 219             mod_set_uint32, mod_get_uint32,
 220             {68, 65535, 1500}, {1500} },
 221
 222         { "_mtu_probe_interval", MOD_PROTO_SCTP,
 223             mod_set_uint32, mod_get_uint32,
 224             {0, 1*DAYS, 10*MINUTES}, {10*MINUTES} },
 225
 226         { "_new_secret_interval", MOD_PROTO_SCTP,
 227             mod_set_uint32, mod_get_uint32,
 228             {0, 1*DAYS, 2*MINUTES}, {2*MINUTES} },
 229
 230         /* tunable - 10 */
 231         { "_deferred_ack_interval", MOD_PROTO_SCTP,
 232             mod_set_uint32, mod_get_uint32,
 233             {10*MS, 1*MINUTES, 100*MS}, {100*MS} },
 234
 235         { "_snd_lowat_fraction", MOD_PROTO_SCTP,
 236             mod_set_uint32, mod_get_uint32,
 237             {0, 16, 0}, {0} },
 238
 239         { "_ignore_path_mtu", MOD_PROTO_SCTP,
 240             mod_set_boolean, mod_get_boolean,
 241             {B_FALSE}, {B_FALSE} },
 242
 243         { "_initial_ssthresh", MOD_PROTO_SCTP,
 244             mod_set_uint32, mod_get_uint32,
 245             {1024, UINT32_MAX, SCTP_RECV_HIWATER}, { SCTP_RECV_HIWATER} },
 246
 247         { "smallest_anon_port", MOD_PROTO_SCTP,
 248             mod_set_uint32, mod_get_uint32,
 249             {1024, ULP_MAX_PORT, 32*1024}, {32*1024} },
 250
 251         { "largest_anon_port", MOD_PROTO_SCTP,
 252             mod_set_uint32, mod_get_uint32,
 253             {1024, ULP_MAX_PORT, ULP_MAX_PORT}, {ULP_MAX_PORT} },
 254
 255         { "send_buf", MOD_PROTO_SCTP,
 256             sctp_set_buf_prop, sctp_get_buf_prop,
 257             {SCTP_XMIT_LOWATER,  ULP_MAX_BUF,  SCTP_XMIT_HIWATER},
 258             {SCTP_XMIT_HIWATER} },
 259
 260         { "_xmit_lowat", MOD_PROTO_SCTP,
 261             mod_set_uint32, mod_get_uint32,
 262             {SCTP_XMIT_LOWATER,  ULP_MAX_BUF,  SCTP_XMIT_LOWATER},
 263             {SCTP_XMIT_LOWATER} },
 264
 265         { "recv_buf", MOD_PROTO_SCTP,
 266             sctp_set_buf_prop, sctp_get_buf_prop,
 267             {SCTP_RECV_LOWATER,  ULP_MAX_BUF,  SCTP_RECV_HIWATER},
 268             {SCTP_RECV_HIWATER} },
 269
 270         { "max_buf", MOD_PROTO_SCTP,
 271             mod_set_uint32, mod_get_uint32,
 272             {8192, ULP_MAX_BUF, 1024*1024}, {1024*1024} },
 273
 274         /* tunable - 20 */
 275         { "_rtt_updates", MOD_PROTO_SCTP,
 276             mod_set_uint32, mod_get_uint32,
 277             {0, 65536, 20}, {20} },
 278
 279         { "_ipv6_hoplimit", MOD_PROTO_SCTP,
 280             mod_set_uint32, mod_get_uint32,
 281             {0, IPV6_MAX_HOPS, IPV6_DEFAULT_HOPS}, {IPV6_DEFAULT_HOPS} },
 282
 283         { "_rto_min", MOD_PROTO_SCTP,
 284             mod_set_uint32, mod_get_uint32,
 285             {500*MS, 60*SECONDS, 1*SECONDS}, {1*SECONDS} },
 286
 287         { "_rto_max", MOD_PROTO_SCTP,
 288             mod_set_uint32, mod_get_uint32,
 289             {1*SECONDS, 60000*SECONDS, 60*SECONDS}, {60*SECONDS} },
 290
 291         { "_rto_initial", MOD_PROTO_SCTP,
 292             mod_set_uint32, mod_get_uint32,
 293             {1*SECONDS, 60000*SECONDS, 3*SECONDS}, {3*SECONDS} },
 294
 295         { "_cookie_life", MOD_PROTO_SCTP,
 296             mod_set_uint32, mod_get_uint32,
 297             {10*MS, 60000*SECONDS, 60*SECONDS}, {60*SECONDS} },
 298
 299         { "_max_in_streams", MOD_PROTO_SCTP,
 300             mod_set_uint32, mod_get_uint32,
 301             {1, UINT16_MAX, 32}, {32} },
 302
 303         { "_initial_out_streams", MOD_PROTO_SCTP,
 304             mod_set_uint32, mod_get_uint32,
 305             {1, UINT16_MAX, 32}, {32} },
 306
 307         { "_shutack_wait_bound", MOD_PROTO_SCTP,
 308             mod_set_uint32, mod_get_uint32,
 309             {0, 300*SECONDS, 60*SECONDS}, {60*SECONDS} },
 310
 311         { "_maxburst", MOD_PROTO_SCTP,
 312             mod_set_uint32, mod_get_uint32,
 313             {2, 8, 4}, {4} },
 314
 315         /* tunable - 30 */
 316         { "_addip_enabled", MOD_PROTO_SCTP,
 317             mod_set_boolean, mod_get_boolean,
 318             {B_FALSE}, {B_FALSE} },
 319
 320         { "_recv_hiwat_minmss", MOD_PROTO_SCTP,
 321             mod_set_uint32, mod_get_uint32,
 322             {1, 65536, 4}, {4} },
 323
 324         { "_slow_start_initial", MOD_PROTO_SCTP,
 325             mod_set_uint32, mod_get_uint32,
 326             {1, 16, 4}, {4} },
 327
 328         { "_slow_start_after_idle", MOD_PROTO_SCTP,
 329             mod_set_uint32, mod_get_uint32,
 330             {1, 16384, 4}, {4} },
 331
 332         { "_prsctp_enabled", MOD_PROTO_SCTP,
 333             mod_set_boolean, mod_get_boolean,
 334             {B_TRUE}, {B_TRUE} },
 335
 336         { "_fast_rxt_thresh", MOD_PROTO_SCTP,
 337             mod_set_uint32, mod_get_uint32,
 338             {1, 10000, 3}, {3} },
 339
 340         { "_deferred_acks_max", MOD_PROTO_SCTP,
 341             mod_set_uint32, mod_get_uint32,
 342             { 1, 16, 2}, {2} },
 343
 344         /*
 345          * sctp_wroff_xtra is the extra space in front of SCTP/IP header
 346          * for link layer header.  It has to be a multiple of 8.
 347          */
 348         { "_wroff_xtra", MOD_PROTO_SCTP,
 349             mod_set_aligned, mod_get_uint32,
 350             {0, 256, 32}, {32} },
 351
 352         { "extra_priv_ports", MOD_PROTO_SCTP,
 353             mod_set_extra_privports, mod_get_extra_privports,
 354             {1, ULP_MAX_PORT, 0}, {0} },
 355
 356         { "_listener_limit_conf", MOD_PROTO_SCTP,
 357             NULL, sctp_listener_conf_get, {0}, {0} },
 358
 359         { "_listener_limit_conf_add", MOD_PROTO_SCTP,
 360             sctp_listener_conf_add, NULL, {0}, {0} },
 361
 362         { "_listener_limit_conf_del", MOD_PROTO_SCTP,
 363             sctp_listener_conf_del, NULL, {0}, {0} },
 364
 365         { "?", MOD_PROTO_SCTP, NULL, mod_get_allprop, {0}, {0} },
 366
 367         { NULL, 0, NULL, NULL, {0}, {0} }
 368 };
 369
 370 int sctp_propinfo_count = A_CNT(sctp_propinfo_tbl);