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