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TOMOYO Linux Cross Reference
Linux/include/rdma/ib_addr.h

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  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 #include <net/net_namespace.h>
 51 
 52 struct rdma_addr_client {
 53         atomic_t refcount;
 54         struct completion comp;
 55 };
 56 
 57 /**
 58  * rdma_addr_register_client - Register an address client.
 59  */
 60 void rdma_addr_register_client(struct rdma_addr_client *client);
 61 
 62 /**
 63  * rdma_addr_unregister_client - Deregister an address client.
 64  * @client: Client object to deregister.
 65  */
 66 void rdma_addr_unregister_client(struct rdma_addr_client *client);
 67 
 68 /**
 69  * struct rdma_dev_addr - Contains resolved RDMA hardware addresses
 70  * @src_dev_addr:       Source MAC address.
 71  * @dst_dev_addr:       Destination MAC address.
 72  * @broadcast:          Broadcast address of the device.
 73  * @dev_type:           The interface hardware type of the device.
 74  * @bound_dev_if:       An optional device interface index.
 75  * @transport:          The transport type used.
 76  * @net:                Network namespace containing the bound_dev_if net_dev.
 77  */
 78 struct 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 net *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  */
 96 int 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  */
115 int 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 
122 int rdma_resolve_ip_route(struct sockaddr *src_addr,
123                           const struct sockaddr *dst_addr,
124                           struct rdma_dev_addr *addr);
125 
126 void rdma_addr_cancel(struct rdma_dev_addr *addr);
127 
128 int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev,
129               const unsigned char *dst_dev_addr);
130 
131 int rdma_addr_size(struct sockaddr *addr);
132 
133 int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id);
134 int 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 
139 static 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 
144 static 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 
150 static 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 
156 static 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 
161 static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
162 {
163         return dev->priv_flags & IFF_802_1Q_VLAN ?
164                 vlan_dev_vlan_id(dev) : 0xffff;
165 }
166 
167 static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid)
168 {
169         switch (addr->sa_family) {
170         case AF_INET:
171                 ipv6_addr_set_v4mapped(((struct sockaddr_in *)
172                                         addr)->sin_addr.s_addr,
173                                        (struct in6_addr *)gid);
174                 break;
175         case AF_INET6:
176                 memcpy(gid->raw, &((struct sockaddr_in6 *)addr)->sin6_addr, 16);
177                 break;
178         default:
179                 return -EINVAL;
180         }
181         return 0;
182 }
183 
184 /* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */
185 static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid)
186 {
187         if (ipv6_addr_v4mapped((struct in6_addr *)gid)) {
188                 struct sockaddr_in *out_in = (struct sockaddr_in *)out;
189                 memset(out_in, 0, sizeof(*out_in));
190                 out_in->sin_family = AF_INET;
191                 memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4);
192         } else {
193                 struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out;
194                 memset(out_in, 0, sizeof(*out_in));
195                 out_in->sin6_family = AF_INET6;
196                 memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16);
197         }
198 }
199 
200 static inline void iboe_addr_get_sgid(struct rdma_dev_addr *dev_addr,
201                                       union ib_gid *gid)
202 {
203         struct net_device *dev;
204         struct in_device *ip4;
205 
206         dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
207         if (dev) {
208                 ip4 = (struct in_device *)dev->ip_ptr;
209                 if (ip4 && ip4->ifa_list && ip4->ifa_list->ifa_address)
210                         ipv6_addr_set_v4mapped(ip4->ifa_list->ifa_address,
211                                                (struct in6_addr *)gid);
212                 dev_put(dev);
213         }
214 }
215 
216 static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
217 {
218         if (dev_addr->transport == RDMA_TRANSPORT_IB &&
219             dev_addr->dev_type != ARPHRD_INFINIBAND)
220                 iboe_addr_get_sgid(dev_addr, gid);
221         else
222                 memcpy(gid, dev_addr->src_dev_addr +
223                        rdma_addr_gid_offset(dev_addr), sizeof *gid);
224 }
225 
226 static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
227 {
228         memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
229 }
230 
231 static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
232 {
233         memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
234 }
235 
236 static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
237 {
238         memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
239 }
240 
241 static inline enum ib_mtu iboe_get_mtu(int mtu)
242 {
243         /*
244          * reduce IB headers from effective IBoE MTU. 28 stands for
245          * atomic header which is the biggest possible header after BTH
246          */
247         mtu = mtu - IB_GRH_BYTES - IB_BTH_BYTES - 28;
248 
249         if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096))
250                 return IB_MTU_4096;
251         else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048))
252                 return IB_MTU_2048;
253         else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024))
254                 return IB_MTU_1024;
255         else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512))
256                 return IB_MTU_512;
257         else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256))
258                 return IB_MTU_256;
259         else
260                 return 0;
261 }
262 
263 static inline int iboe_get_rate(struct net_device *dev)
264 {
265         struct ethtool_link_ksettings cmd;
266         int err;
267 
268         rtnl_lock();
269         err = __ethtool_get_link_ksettings(dev, &cmd);
270         rtnl_unlock();
271         if (err)
272                 return IB_RATE_PORT_CURRENT;
273 
274         if (cmd.base.speed >= 40000)
275                 return IB_RATE_40_GBPS;
276         else if (cmd.base.speed >= 30000)
277                 return IB_RATE_30_GBPS;
278         else if (cmd.base.speed >= 20000)
279                 return IB_RATE_20_GBPS;
280         else if (cmd.base.speed >= 10000)
281                 return IB_RATE_10_GBPS;
282         else
283                 return IB_RATE_PORT_CURRENT;
284 }
285 
286 static inline int rdma_link_local_addr(struct in6_addr *addr)
287 {
288         if (addr->s6_addr32[0] == htonl(0xfe800000) &&
289             addr->s6_addr32[1] == 0)
290                 return 1;
291 
292         return 0;
293 }
294 
295 static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac)
296 {
297         memcpy(mac, &addr->s6_addr[8], 3);
298         memcpy(mac + 3, &addr->s6_addr[13], 3);
299         mac[0] ^= 2;
300 }
301 
302 static inline int rdma_is_multicast_addr(struct in6_addr *addr)
303 {
304         return addr->s6_addr[0] == 0xff;
305 }
306 
307 static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac)
308 {
309         int i;
310 
311         mac[0] = 0x33;
312         mac[1] = 0x33;
313         for (i = 2; i < 6; ++i)
314                 mac[i] = addr->s6_addr[i + 10];
315 }
316 
317 static inline u16 rdma_get_vlan_id(union ib_gid *dgid)
318 {
319         u16 vid;
320 
321         vid = dgid->raw[11] << 8 | dgid->raw[12];
322         return vid < 0x1000 ? vid : 0xffff;
323 }
324 
325 static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev)
326 {
327         return dev->priv_flags & IFF_802_1Q_VLAN ?
328                 vlan_dev_real_dev(dev) : NULL;
329 }
330 
331 #endif /* IB_ADDR_H */
332 

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