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 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 #ifndef _SYS_NETSTACK_H 27 #define _SYS_NETSTACK_H 28 29 #include <sys/kstat.h> 30 31 #ifdef __cplusplus 32 extern "C" { 33 #endif 34 35 /* 36 * This allows various pieces in and around IP to have a separate instance 37 * for each instance of IP. This is used to support zones that have an 38 * exclusive stack. 39 * Pieces of software far removed from IP (e.g., kernel software 40 * sitting on top of TCP or UDP) probably should not use the netstack 41 * support; if such software wants to support separate zones it 42 * can do that using the zones framework (zone_key_create() etc) 43 * whether there is a shared IP stack or and exclusive IP stack underneath. 44 */ 45 46 /* 47 * Each netstack has an identifier. We reuse the zoneid allocation for 48 * this but have a separate typedef. Thus the shared stack (used by 49 * the global zone and other shared stack zones) have a zero ID, and 50 * the exclusive stacks have a netstackid that is the same as their zoneid. 51 */ 52 typedef id_t netstackid_t; 53 54 #define GLOBAL_NETSTACKID 0 55 56 /* 57 * One for each module which uses netstack support. 58 * Used in netstack_register(). 59 * 60 * The order of these is important for some modules both for 61 * the creation (which done in ascending order) and destruction (which is 62 * done ine in decending order). 63 */ 64 #define NS_ALL -1 /* Match all */ 65 #define NS_STR 0 /* autopush list etc */ 66 #define NS_HOOK 1 67 #define NS_NETI 2 68 #define NS_ARP 3 69 #define NS_IP 4 70 #define NS_ICMP 5 71 #define NS_UDP 6 72 #define NS_TCP 7 73 #define NS_SCTP 8 74 #define NS_RTS 9 75 #define NS_IPSEC 10 76 #define NS_KEYSOCK 11 77 #define NS_SPDSOCK 12 78 #define NS_IPSECAH 13 79 #define NS_IPSECESP 14 80 #define NS_TUN 15 81 #define NS_IPNET 16 82 #define NS_MAX (NS_IPNET+1) 83 84 /* 85 * State maintained for each module which tracks the state of 86 * the create, shutdown and destroy callbacks. 87 * 88 * Keeps track of pending actions to avoid holding locks when 89 * calling into the create/shutdown/destroy functions in the module. 90 */ 91 #ifdef _KERNEL 92 typedef struct { 93 uint16_t nms_flags; 94 kcondvar_t nms_cv; 95 } nm_state_t; 96 97 /* 98 * nms_flags 99 */ 100 #define NSS_CREATE_NEEDED 0x0001 101 #define NSS_CREATE_INPROGRESS 0x0002 102 #define NSS_CREATE_COMPLETED 0x0004 103 #define NSS_SHUTDOWN_NEEDED 0x0010 104 #define NSS_SHUTDOWN_INPROGRESS 0x0020 105 #define NSS_SHUTDOWN_COMPLETED 0x0040 106 #define NSS_DESTROY_NEEDED 0x0100 107 #define NSS_DESTROY_INPROGRESS 0x0200 108 #define NSS_DESTROY_COMPLETED 0x0400 109 110 #define NSS_CREATE_ALL \ 111 (NSS_CREATE_NEEDED|NSS_CREATE_INPROGRESS|NSS_CREATE_COMPLETED) 112 #define NSS_SHUTDOWN_ALL \ 113 (NSS_SHUTDOWN_NEEDED|NSS_SHUTDOWN_INPROGRESS|NSS_SHUTDOWN_COMPLETED) 114 #define NSS_DESTROY_ALL \ 115 (NSS_DESTROY_NEEDED|NSS_DESTROY_INPROGRESS|NSS_DESTROY_COMPLETED) 116 117 #define NSS_ALL_INPROGRESS \ 118 (NSS_CREATE_INPROGRESS|NSS_SHUTDOWN_INPROGRESS|NSS_DESTROY_INPROGRESS) 119 #else 120 /* User-level compile like IP Filter needs a netstack_t. Dummy */ 121 typedef uint_t nm_state_t; 122 #endif /* _KERNEL */ 123 124 /* 125 * One for every netstack in the system. 126 * We use a union so that the compilar and lint can provide type checking - 127 * in principle we could have 128 * #define netstack_arp netstack_modules[NS_ARP] 129 * etc, but that would imply void * types hence no type checking by the 130 * compiler. 131 * 132 * All the fields in netstack_t except netstack_next are protected by 133 * netstack_lock. netstack_next is protected by netstack_g_lock. 134 */ 135 struct netstack { 136 union { 137 void *nu_modules[NS_MAX]; 138 struct { 139 struct str_stack *nu_str; 140 struct hook_stack *nu_hook; 141 struct neti_stack *nu_neti; 142 struct arp_stack *nu_arp; 143 struct ip_stack *nu_ip; 144 struct icmp_stack *nu_icmp; 145 struct udp_stack *nu_udp; 146 struct tcp_stack *nu_tcp; 147 struct sctp_stack *nu_sctp; 148 struct rts_stack *nu_rts; 149 struct ipsec_stack *nu_ipsec; 150 struct keysock_stack *nu_keysock; 151 struct spd_stack *nu_spdsock; 152 struct ipsecah_stack *nu_ipsecah; 153 struct ipsecesp_stack *nu_ipsecesp; 154 struct tun_stack *nu_tun; 155 struct ipnet_stack *nu_ipnet; 156 } nu_s; 157 } netstack_u; 158 #define netstack_modules netstack_u.nu_modules 159 #define netstack_str netstack_u.nu_s.nu_str 160 #define netstack_hook netstack_u.nu_s.nu_hook 161 #define netstack_neti netstack_u.nu_s.nu_neti 162 #define netstack_arp netstack_u.nu_s.nu_arp 163 #define netstack_ip netstack_u.nu_s.nu_ip 164 #define netstack_icmp netstack_u.nu_s.nu_icmp 165 #define netstack_udp netstack_u.nu_s.nu_udp 166 #define netstack_tcp netstack_u.nu_s.nu_tcp 167 #define netstack_sctp netstack_u.nu_s.nu_sctp 168 #define netstack_rts netstack_u.nu_s.nu_rts 169 #define netstack_ipsec netstack_u.nu_s.nu_ipsec 170 #define netstack_keysock netstack_u.nu_s.nu_keysock 171 #define netstack_spdsock netstack_u.nu_s.nu_spdsock 172 #define netstack_ipsecah netstack_u.nu_s.nu_ipsecah 173 #define netstack_ipsecesp netstack_u.nu_s.nu_ipsecesp 174 #define netstack_tun netstack_u.nu_s.nu_tun 175 #define netstack_ipnet netstack_u.nu_s.nu_ipnet 176 177 nm_state_t netstack_m_state[NS_MAX]; /* module state */ 178 179 kmutex_t netstack_lock; 180 struct netstack *netstack_next; 181 netstackid_t netstack_stackid; 182 int netstack_numzones; /* Number of zones using this */ 183 int netstack_refcnt; /* Number of hold-rele */ 184 int netstack_flags; /* See below */ 185 186 #ifdef _KERNEL 187 /* Needed to ensure that we run the callback functions in order */ 188 kcondvar_t netstack_cv; 189 #endif 190 }; 191 typedef struct netstack netstack_t; 192 193 /* netstack_flags values */ 194 #define NSF_UNINIT 0x01 /* Not initialized */ 195 #define NSF_CLOSING 0x02 /* Going away */ 196 #define NSF_ZONE_CREATE 0x04 /* create callbacks inprog */ 197 #define NSF_ZONE_SHUTDOWN 0x08 /* shutdown callbacks */ 198 #define NSF_ZONE_DESTROY 0x10 /* destroy callbacks */ 199 200 #define NSF_ZONE_INPROGRESS \ 201 (NSF_ZONE_CREATE|NSF_ZONE_SHUTDOWN|NSF_ZONE_DESTROY) 202 203 /* 204 * One for each of the NS_* values. 205 */ 206 struct netstack_registry { 207 int nr_flags; /* 0 if nothing registered */ 208 void *(*nr_create)(netstackid_t, netstack_t *); 209 void (*nr_shutdown)(netstackid_t, void *); 210 void (*nr_destroy)(netstackid_t, void *); 211 }; 212 213 /* nr_flags values */ 214 #define NRF_REGISTERED 0x01 215 #define NRF_DYING 0x02 /* No new creates */ 216 217 /* 218 * To support kstat_create_netstack() using kstat_add_zone we need 219 * to track both 220 * - all zoneids that use the global/shared stack 221 * - all kstats that have been added for the shared stack 222 */ 223 224 extern void netstack_init(void); 225 extern void netstack_hold(netstack_t *); 226 extern void netstack_rele(netstack_t *); 227 extern netstack_t *netstack_find_by_cred(const cred_t *); 228 extern netstack_t *netstack_find_by_stackid(netstackid_t); 229 extern netstack_t *netstack_find_by_zoneid(zoneid_t); 230 231 extern zoneid_t netstackid_to_zoneid(netstackid_t); 232 extern netstackid_t zoneid_to_netstackid(zoneid_t); 233 234 extern netstack_t *netstack_get_current(void); 235 236 /* 237 * Register interest in changes to the set of netstacks. 238 * The createfn and destroyfn are required, but the shutdownfn can be 239 * NULL. 240 * Note that due to the current zsd implementation, when the create 241 * function is called the zone isn't fully present, thus functions 242 * like zone_find_by_* will fail, hence the create function can not 243 * use many zones kernel functions including zcmn_err(). 244 */ 245 extern void netstack_register(int, 246 void *(*)(netstackid_t, netstack_t *), 247 void (*)(netstackid_t, void *), 248 void (*)(netstackid_t, void *)); 249 extern void netstack_unregister(int); 250 extern kstat_t *kstat_create_netstack(char *, int, char *, char *, uchar_t, 251 uint_t, uchar_t, netstackid_t); 252 extern void kstat_delete_netstack(kstat_t *, netstackid_t); 253 254 /* 255 * Simple support for walking all the netstacks. 256 * The caller of netstack_next() needs to call netstack_rele() when 257 * done with a netstack. 258 */ 259 typedef int netstack_handle_t; 260 261 extern void netstack_next_init(netstack_handle_t *); 262 extern void netstack_next_fini(netstack_handle_t *); 263 extern netstack_t *netstack_next(netstack_handle_t *); 264 265 #ifdef __cplusplus 266 } 267 #endif 268 269 270 #endif /* _SYS_NETSTACK_H */ 271