ib_addr.h revision 331769
1/* 2 * Copyright (c) 2005 Voltaire Inc. All rights reserved. 3 * Copyright (c) 2005 Intel Corporation. All rights reserved. 4 * 5 * This software is available to you under a choice of one of two 6 * licenses. You may choose to be licensed under the terms of the GNU 7 * General Public License (GPL) Version 2, available from the file 8 * COPYING in the main directory of this source tree, or the 9 * OpenIB.org BSD license below: 10 * 11 * Redistribution and use in source and binary forms, with or 12 * without modification, are permitted provided that the following 13 * conditions are met: 14 * 15 * - Redistributions of source code must retain the above 16 * copyright notice, this list of conditions and the following 17 * disclaimer. 18 * 19 * - Redistributions in binary form must reproduce the above 20 * copyright notice, this list of conditions and the following 21 * disclaimer in the documentation and/or other materials 22 * provided with the distribution. 23 * 24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 31 * SOFTWARE. 32 */ 33 34#if !defined(IB_ADDR_H) 35#define IB_ADDR_H 36 37#include <linux/in.h> 38#include <linux/in6.h> 39#include <linux/if_arp.h> 40#include <linux/netdevice.h> 41#include <linux/inetdevice.h> 42#include <linux/socket.h> 43#include <linux/if_vlan.h> 44#include <net/ipv6.h> 45#include <net/if_inet6.h> 46#include <net/ip.h> 47#include <rdma/ib_verbs.h> 48#include <rdma/ib_pack.h> 49#include <net/ipv6.h> 50 51struct rdma_addr_client { 52 atomic_t refcount; 53 struct completion comp; 54}; 55 56/** 57 * rdma_addr_register_client - Register an address client. 58 */ 59void rdma_addr_register_client(struct rdma_addr_client *client); 60 61/** 62 * rdma_addr_unregister_client - Deregister an address client. 63 * @client: Client object to deregister. 64 */ 65void rdma_addr_unregister_client(struct rdma_addr_client *client); 66 67/** 68 * struct rdma_dev_addr - Contains resolved RDMA hardware addresses 69 * @src_dev_addr: Source MAC address. 70 * @dst_dev_addr: Destination MAC address. 71 * @broadcast: Broadcast address of the device. 72 * @dev_type: The interface hardware type of the device. 73 * @bound_dev_if: An optional device interface index. 74 * @transport: The transport type used. 75 * @net: Network namespace containing the bound_dev_if net_dev. 76 */ 77struct vnet; 78struct rdma_dev_addr { 79 unsigned char src_dev_addr[MAX_ADDR_LEN]; 80 unsigned char dst_dev_addr[MAX_ADDR_LEN]; 81 unsigned char broadcast[MAX_ADDR_LEN]; 82 unsigned short dev_type; 83 int bound_dev_if; 84 enum rdma_transport_type transport; 85 struct vnet *net; 86 enum rdma_network_type network; 87 int hoplimit; 88}; 89 90/** 91 * rdma_translate_ip - Translate a local IP address to an RDMA hardware 92 * address. 93 * 94 * The dev_addr->net field must be initialized. 95 */ 96int rdma_translate_ip(const struct sockaddr *addr, 97 struct rdma_dev_addr *dev_addr, u16 *vlan_id); 98 99/** 100 * rdma_resolve_ip - Resolve source and destination IP addresses to 101 * RDMA hardware addresses. 102 * @client: Address client associated with request. 103 * @src_addr: An optional source address to use in the resolution. If a 104 * source address is not provided, a usable address will be returned via 105 * the callback. 106 * @dst_addr: The destination address to resolve. 107 * @addr: A reference to a data location that will receive the resolved 108 * addresses. The data location must remain valid until the callback has 109 * been invoked. The net field of the addr struct must be valid. 110 * @timeout_ms: Amount of time to wait for the address resolution to complete. 111 * @callback: Call invoked once address resolution has completed, timed out, 112 * or been canceled. A status of 0 indicates success. 113 * @context: User-specified context associated with the call. 114 */ 115int rdma_resolve_ip(struct rdma_addr_client *client, 116 struct sockaddr *src_addr, struct sockaddr *dst_addr, 117 struct rdma_dev_addr *addr, int timeout_ms, 118 void (*callback)(int status, struct sockaddr *src_addr, 119 struct rdma_dev_addr *addr, void *context), 120 void *context); 121 122int rdma_resolve_ip_route(struct sockaddr *src_addr, 123 const struct sockaddr *dst_addr, 124 struct rdma_dev_addr *addr); 125 126void rdma_addr_cancel(struct rdma_dev_addr *addr); 127 128int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev, 129 const unsigned char *dst_dev_addr); 130 131int rdma_addr_size(struct sockaddr *addr); 132 133int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id); 134int rdma_addr_find_l2_eth_by_grh(const union ib_gid *sgid, 135 const union ib_gid *dgid, 136 u8 *smac, u16 *vlan_id, int *if_index, 137 int *hoplimit); 138 139static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr) 140{ 141 return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9]; 142} 143 144static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey) 145{ 146 dev_addr->broadcast[8] = pkey >> 8; 147 dev_addr->broadcast[9] = (unsigned char) pkey; 148} 149 150static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr, 151 union ib_gid *gid) 152{ 153 memcpy(gid, dev_addr->broadcast + 4, sizeof *gid); 154} 155 156static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr) 157{ 158 return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0; 159} 160 161static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev) 162{ 163 uint16_t tag; 164 165 if (VLAN_TAG(__DECONST(struct ifnet *, dev), &tag) != 0) 166 return 0xffff; 167 return tag; 168} 169 170static inline int rdma_ip2gid(const struct sockaddr *addr, union ib_gid *gid) 171{ 172 switch (addr->sa_family) { 173 case AF_INET: 174 ipv6_addr_set_v4mapped(((const struct sockaddr_in *) 175 addr)->sin_addr.s_addr, 176 (struct in6_addr *)gid); 177 break; 178 case AF_INET6: 179 memcpy(gid->raw, &((const struct sockaddr_in6 *)addr)->sin6_addr, 16); 180 /* make sure scope ID gets zeroed inside GID */ 181 if (IN6_IS_SCOPE_LINKLOCAL((struct in6_addr *)gid->raw) || 182 IN6_IS_ADDR_MC_INTFACELOCAL((struct in6_addr *)gid->raw)) { 183 gid->raw[2] = 0; 184 gid->raw[3] = 0; 185 } 186 break; 187 default: 188 return -EINVAL; 189 } 190 return 0; 191} 192 193/* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */ 194static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid) 195{ 196 if (ipv6_addr_v4mapped((const struct in6_addr *)gid)) { 197 struct sockaddr_in *out_in = (struct sockaddr_in *)out; 198 memset(out_in, 0, sizeof(*out_in)); 199 out_in->sin_len = sizeof(*out_in); 200 out_in->sin_family = AF_INET; 201 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4); 202 } else { 203 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out; 204 memset(out_in, 0, sizeof(*out_in)); 205 out_in->sin6_len = sizeof(*out_in); 206 out_in->sin6_family = AF_INET6; 207 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16); 208 } 209} 210 211static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr, 212 union ib_gid *gid) 213{ 214 struct net_device *dev; 215 struct ifaddr *ifa; 216 217 dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if); 218 if (dev) { 219 TAILQ_FOREACH(ifa, &dev->if_addrhead, ifa_link) { 220 if (ifa->ifa_addr == NULL || 221 ifa->ifa_addr->sa_family != AF_INET) 222 continue; 223 ipv6_addr_set_v4mapped(((struct sockaddr_in *) 224 ifa->ifa_addr)->sin_addr.s_addr, 225 (struct in6_addr *)gid); 226 break; 227 } 228 dev_put(dev); 229 } 230} 231 232static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 233{ 234 if (dev_addr->transport == RDMA_TRANSPORT_IB && 235 dev_addr->dev_type != ARPHRD_INFINIBAND) 236 iboe_addr_get_sgid(dev_addr, gid); 237 else 238 memcpy(gid, dev_addr->src_dev_addr + 239 rdma_addr_gid_offset(dev_addr), sizeof *gid); 240} 241 242static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 243{ 244 memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 245} 246 247static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 248{ 249 memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid); 250} 251 252static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid) 253{ 254 memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid); 255} 256 257static inline enum ib_mtu iboe_get_mtu(int mtu) 258{ 259 /* 260 * reduce IB headers from effective IBoE MTU. 28 stands for 261 * atomic header which is the biggest possible header after BTH 262 */ 263 mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28; 264 265 if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096)) 266 return IB_MTU_4096; 267 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048)) 268 return IB_MTU_2048; 269 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024)) 270 return IB_MTU_1024; 271 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512)) 272 return IB_MTU_512; 273 else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256)) 274 return IB_MTU_256; 275 else 276 return 0; 277} 278 279static inline int iboe_get_rate(struct net_device *dev) 280{ 281 uint64_t baudrate = dev->if_baudrate; 282#ifdef if_baudrate_pf 283 int exp; 284 for (exp = dev->if_baudrate_pf; exp > 0; exp--) 285 baudrate *= 10; 286#endif 287 if (baudrate >= IF_Gbps(40)) 288 return IB_RATE_40_GBPS; 289 else if (baudrate >= IF_Gbps(30)) 290 return IB_RATE_30_GBPS; 291 else if (baudrate >= IF_Gbps(20)) 292 return IB_RATE_20_GBPS; 293 else if (baudrate >= IF_Gbps(10)) 294 return IB_RATE_10_GBPS; 295 else 296 return IB_RATE_PORT_CURRENT; 297} 298 299static inline int rdma_link_local_addr(struct in6_addr *addr) 300{ 301 if (addr->s6_addr32[0] == htonl(0xfe800000) && 302 addr->s6_addr32[1] == 0) 303 return 1; 304 305 return 0; 306} 307 308static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac) 309{ 310 memcpy(mac, &addr->s6_addr[8], 3); 311 memcpy(mac + 3, &addr->s6_addr[13], 3); 312 mac[0] ^= 2; 313} 314 315static inline int rdma_is_multicast_addr(struct in6_addr *addr) 316{ 317 return addr->s6_addr[0] == 0xff; 318} 319 320static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac) 321{ 322 int i; 323 324 mac[0] = 0x33; 325 mac[1] = 0x33; 326 for (i = 2; i < 6; ++i) 327 mac[i] = addr->s6_addr[i + 10]; 328} 329 330static inline u16 rdma_get_vlan_id(union ib_gid *dgid) 331{ 332 u16 vid; 333 334 vid = dgid->raw[11] << 8 | dgid->raw[12]; 335 return vid < 0x1000 ? vid : 0xffff; 336} 337 338static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev) 339{ 340 return VLAN_TRUNKDEV(__DECONST(struct ifnet *, dev)); 341} 342 343#endif /* IB_ADDR_H */ 344