248 строки
7.2 KiB
C
248 строки
7.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
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/*
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* Copyright (c) 2005 Voltaire Inc. All rights reserved.
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* Copyright (c) 2005 Intel Corporation. All rights reserved.
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*/
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#ifndef IB_ADDR_H
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#define IB_ADDR_H
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#include <linux/ethtool.h>
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#include <linux/in.h>
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#include <linux/in6.h>
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#include <linux/if_arp.h>
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#include <linux/netdevice.h>
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#include <linux/inetdevice.h>
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#include <linux/socket.h>
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#include <linux/if_vlan.h>
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#include <net/ipv6.h>
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#include <net/if_inet6.h>
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#include <net/ip.h>
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#include <rdma/ib_verbs.h>
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#include <rdma/ib_pack.h>
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#include <net/net_namespace.h>
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/**
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* struct rdma_dev_addr - Contains resolved RDMA hardware addresses
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* @src_dev_addr: Source MAC address.
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* @dst_dev_addr: Destination MAC address.
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* @broadcast: Broadcast address of the device.
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* @dev_type: The interface hardware type of the device.
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* @bound_dev_if: An optional device interface index.
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* @transport: The transport type used.
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* @net: Network namespace containing the bound_dev_if net_dev.
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* @sgid_attr: GID attribute to use for identified SGID
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*/
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struct rdma_dev_addr {
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unsigned char src_dev_addr[MAX_ADDR_LEN];
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unsigned char dst_dev_addr[MAX_ADDR_LEN];
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unsigned char broadcast[MAX_ADDR_LEN];
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unsigned short dev_type;
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int bound_dev_if;
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enum rdma_transport_type transport;
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struct net *net;
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const struct ib_gid_attr *sgid_attr;
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enum rdma_network_type network;
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int hoplimit;
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};
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/**
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* rdma_translate_ip - Translate a local IP address to an RDMA hardware
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* address.
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*
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* The dev_addr->net field must be initialized.
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*/
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int rdma_translate_ip(const struct sockaddr *addr,
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struct rdma_dev_addr *dev_addr);
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/**
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* rdma_resolve_ip - Resolve source and destination IP addresses to
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* RDMA hardware addresses.
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* @src_addr: An optional source address to use in the resolution. If a
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* source address is not provided, a usable address will be returned via
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* the callback.
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* @dst_addr: The destination address to resolve.
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* @addr: A reference to a data location that will receive the resolved
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* addresses. The data location must remain valid until the callback has
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* been invoked. The net field of the addr struct must be valid.
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* @timeout_ms: Amount of time to wait for the address resolution to complete.
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* @callback: Call invoked once address resolution has completed, timed out,
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* or been canceled. A status of 0 indicates success.
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* @resolve_by_gid_attr: Resolve the ip based on the GID attribute from
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* rdma_dev_addr.
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* @context: User-specified context associated with the call.
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*/
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int rdma_resolve_ip(struct sockaddr *src_addr, const struct sockaddr *dst_addr,
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struct rdma_dev_addr *addr, unsigned long timeout_ms,
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void (*callback)(int status, struct sockaddr *src_addr,
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struct rdma_dev_addr *addr, void *context),
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bool resolve_by_gid_attr, void *context);
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void rdma_addr_cancel(struct rdma_dev_addr *addr);
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int rdma_addr_size(const struct sockaddr *addr);
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int rdma_addr_size_in6(struct sockaddr_in6 *addr);
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int rdma_addr_size_kss(struct __kernel_sockaddr_storage *addr);
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static inline u16 ib_addr_get_pkey(struct rdma_dev_addr *dev_addr)
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{
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return ((u16)dev_addr->broadcast[8] << 8) | (u16)dev_addr->broadcast[9];
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}
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static inline void ib_addr_set_pkey(struct rdma_dev_addr *dev_addr, u16 pkey)
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{
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dev_addr->broadcast[8] = pkey >> 8;
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dev_addr->broadcast[9] = (unsigned char) pkey;
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}
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static inline void ib_addr_get_mgid(struct rdma_dev_addr *dev_addr,
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union ib_gid *gid)
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{
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memcpy(gid, dev_addr->broadcast + 4, sizeof *gid);
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}
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static inline int rdma_addr_gid_offset(struct rdma_dev_addr *dev_addr)
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{
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return dev_addr->dev_type == ARPHRD_INFINIBAND ? 4 : 0;
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}
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static inline u16 rdma_vlan_dev_vlan_id(const struct net_device *dev)
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{
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return is_vlan_dev(dev) ? vlan_dev_vlan_id(dev) : 0xffff;
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}
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static inline int rdma_ip2gid(struct sockaddr *addr, union ib_gid *gid)
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{
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switch (addr->sa_family) {
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case AF_INET:
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ipv6_addr_set_v4mapped(((struct sockaddr_in *)
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addr)->sin_addr.s_addr,
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(struct in6_addr *)gid);
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break;
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case AF_INET6:
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*(struct in6_addr *)&gid->raw =
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((struct sockaddr_in6 *)addr)->sin6_addr;
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break;
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default:
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return -EINVAL;
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}
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return 0;
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}
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/* Important - sockaddr should be a union of sockaddr_in and sockaddr_in6 */
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static inline void rdma_gid2ip(struct sockaddr *out, const union ib_gid *gid)
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{
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if (ipv6_addr_v4mapped((struct in6_addr *)gid)) {
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struct sockaddr_in *out_in = (struct sockaddr_in *)out;
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memset(out_in, 0, sizeof(*out_in));
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out_in->sin_family = AF_INET;
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memcpy(&out_in->sin_addr.s_addr, gid->raw + 12, 4);
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} else {
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struct sockaddr_in6 *out_in = (struct sockaddr_in6 *)out;
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memset(out_in, 0, sizeof(*out_in));
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out_in->sin6_family = AF_INET6;
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memcpy(&out_in->sin6_addr.s6_addr, gid->raw, 16);
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}
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}
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/*
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* rdma_get/set_sgid/dgid() APIs are applicable to IB, and iWarp.
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* They are not applicable to RoCE.
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* RoCE GIDs are derived from the IP addresses.
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*/
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static inline void rdma_addr_get_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
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{
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memcpy(gid, dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr),
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sizeof(*gid));
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}
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static inline void rdma_addr_set_sgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
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{
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memcpy(dev_addr->src_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
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}
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static inline void rdma_addr_get_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
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{
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memcpy(gid, dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), sizeof *gid);
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}
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static inline void rdma_addr_set_dgid(struct rdma_dev_addr *dev_addr, union ib_gid *gid)
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{
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memcpy(dev_addr->dst_dev_addr + rdma_addr_gid_offset(dev_addr), gid, sizeof *gid);
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}
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static inline enum ib_mtu iboe_get_mtu(int mtu)
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{
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/*
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* Reduce IB headers from effective IBoE MTU.
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*/
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mtu = mtu - (IB_GRH_BYTES + IB_UDP_BYTES + IB_BTH_BYTES +
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IB_EXT_XRC_BYTES + IB_EXT_ATOMICETH_BYTES +
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IB_ICRC_BYTES);
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if (mtu >= ib_mtu_enum_to_int(IB_MTU_4096))
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return IB_MTU_4096;
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else if (mtu >= ib_mtu_enum_to_int(IB_MTU_2048))
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return IB_MTU_2048;
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else if (mtu >= ib_mtu_enum_to_int(IB_MTU_1024))
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return IB_MTU_1024;
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else if (mtu >= ib_mtu_enum_to_int(IB_MTU_512))
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return IB_MTU_512;
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else if (mtu >= ib_mtu_enum_to_int(IB_MTU_256))
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return IB_MTU_256;
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else
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return 0;
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}
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static inline int rdma_link_local_addr(struct in6_addr *addr)
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{
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if (addr->s6_addr32[0] == htonl(0xfe800000) &&
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addr->s6_addr32[1] == 0)
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return 1;
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return 0;
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}
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static inline void rdma_get_ll_mac(struct in6_addr *addr, u8 *mac)
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{
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memcpy(mac, &addr->s6_addr[8], 3);
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memcpy(mac + 3, &addr->s6_addr[13], 3);
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mac[0] ^= 2;
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}
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static inline int rdma_is_multicast_addr(struct in6_addr *addr)
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{
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__be32 ipv4_addr;
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if (addr->s6_addr[0] == 0xff)
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return 1;
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ipv4_addr = addr->s6_addr32[3];
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return (ipv6_addr_v4mapped(addr) && ipv4_is_multicast(ipv4_addr));
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}
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static inline void rdma_get_mcast_mac(struct in6_addr *addr, u8 *mac)
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{
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int i;
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mac[0] = 0x33;
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mac[1] = 0x33;
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for (i = 2; i < 6; ++i)
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mac[i] = addr->s6_addr[i + 10];
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}
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static inline u16 rdma_get_vlan_id(union ib_gid *dgid)
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{
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u16 vid;
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vid = dgid->raw[11] << 8 | dgid->raw[12];
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return vid < 0x1000 ? vid : 0xffff;
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}
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static inline struct net_device *rdma_vlan_dev_real_dev(const struct net_device *dev)
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{
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return is_vlan_dev(dev) ? vlan_dev_real_dev(dev) : NULL;
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}
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#endif /* IB_ADDR_H */
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