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890 lines
22 KiB
890 lines
22 KiB
/* |
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* Copyright (c) 2005 Voltaire Inc. All rights reserved. |
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* Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved. |
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* Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved. |
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* Copyright (c) 2005 Intel Corporation. All rights reserved. |
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* |
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* This software is available to you under a choice of one of two |
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* licenses. You may choose to be licensed under the terms of the GNU |
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* General Public License (GPL) Version 2, available from the file |
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* COPYING in the main directory of this source tree, or the |
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* OpenIB.org BSD license below: |
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* |
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* Redistribution and use in source and binary forms, with or |
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* without modification, are permitted provided that the following |
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* conditions are met: |
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* |
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* - Redistributions of source code must retain the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer. |
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* |
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* - Redistributions in binary form must reproduce the above |
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* copyright notice, this list of conditions and the following |
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* disclaimer in the documentation and/or other materials |
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* provided with the distribution. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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* SOFTWARE. |
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*/ |
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|
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#include <linux/mutex.h> |
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#include <linux/inetdevice.h> |
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#include <linux/slab.h> |
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#include <linux/workqueue.h> |
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#include <linux/module.h> |
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#include <net/arp.h> |
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#include <net/neighbour.h> |
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#include <net/route.h> |
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#include <net/netevent.h> |
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#include <net/ipv6_stubs.h> |
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#include <net/ip6_route.h> |
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#include <rdma/ib_addr.h> |
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#include <rdma/ib_cache.h> |
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#include <rdma/ib_sa.h> |
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#include <rdma/ib.h> |
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#include <rdma/rdma_netlink.h> |
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#include <net/netlink.h> |
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|
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#include "core_priv.h" |
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|
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struct addr_req { |
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struct list_head list; |
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struct sockaddr_storage src_addr; |
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struct sockaddr_storage dst_addr; |
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struct rdma_dev_addr *addr; |
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void *context; |
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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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unsigned long timeout; |
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struct delayed_work work; |
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bool resolve_by_gid_attr; /* Consider gid attr in resolve phase */ |
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int status; |
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u32 seq; |
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}; |
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|
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static atomic_t ib_nl_addr_request_seq = ATOMIC_INIT(0); |
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|
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static DEFINE_SPINLOCK(lock); |
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static LIST_HEAD(req_list); |
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static struct workqueue_struct *addr_wq; |
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|
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static const struct nla_policy ib_nl_addr_policy[LS_NLA_TYPE_MAX] = { |
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[LS_NLA_TYPE_DGID] = {.type = NLA_BINARY, |
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.len = sizeof(struct rdma_nla_ls_gid), |
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.validation_type = NLA_VALIDATE_MIN, |
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.min = sizeof(struct rdma_nla_ls_gid)}, |
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}; |
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|
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static inline bool ib_nl_is_good_ip_resp(const struct nlmsghdr *nlh) |
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{ |
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struct nlattr *tb[LS_NLA_TYPE_MAX] = {}; |
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int ret; |
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|
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if (nlh->nlmsg_flags & RDMA_NL_LS_F_ERR) |
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return false; |
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ret = nla_parse_deprecated(tb, LS_NLA_TYPE_MAX - 1, nlmsg_data(nlh), |
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nlmsg_len(nlh), ib_nl_addr_policy, NULL); |
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if (ret) |
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return false; |
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|
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return true; |
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} |
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static void ib_nl_process_good_ip_rsep(const struct nlmsghdr *nlh) |
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{ |
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const struct nlattr *head, *curr; |
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union ib_gid gid; |
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struct addr_req *req; |
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int len, rem; |
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int found = 0; |
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head = (const struct nlattr *)nlmsg_data(nlh); |
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len = nlmsg_len(nlh); |
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nla_for_each_attr(curr, head, len, rem) { |
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if (curr->nla_type == LS_NLA_TYPE_DGID) |
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memcpy(&gid, nla_data(curr), nla_len(curr)); |
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} |
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spin_lock_bh(&lock); |
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list_for_each_entry(req, &req_list, list) { |
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if (nlh->nlmsg_seq != req->seq) |
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continue; |
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/* We set the DGID part, the rest was set earlier */ |
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rdma_addr_set_dgid(req->addr, &gid); |
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req->status = 0; |
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found = 1; |
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break; |
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} |
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spin_unlock_bh(&lock); |
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|
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if (!found) |
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pr_info("Couldn't find request waiting for DGID: %pI6\n", |
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&gid); |
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} |
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int ib_nl_handle_ip_res_resp(struct sk_buff *skb, |
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struct nlmsghdr *nlh, |
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struct netlink_ext_ack *extack) |
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{ |
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if ((nlh->nlmsg_flags & NLM_F_REQUEST) || |
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!(NETLINK_CB(skb).sk)) |
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return -EPERM; |
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if (ib_nl_is_good_ip_resp(nlh)) |
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ib_nl_process_good_ip_rsep(nlh); |
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return 0; |
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} |
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static int ib_nl_ip_send_msg(struct rdma_dev_addr *dev_addr, |
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const void *daddr, |
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u32 seq, u16 family) |
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{ |
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struct sk_buff *skb = NULL; |
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struct nlmsghdr *nlh; |
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struct rdma_ls_ip_resolve_header *header; |
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void *data; |
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size_t size; |
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int attrtype; |
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int len; |
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if (family == AF_INET) { |
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size = sizeof(struct in_addr); |
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attrtype = RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_IPV4; |
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} else { |
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size = sizeof(struct in6_addr); |
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attrtype = RDMA_NLA_F_MANDATORY | LS_NLA_TYPE_IPV6; |
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} |
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len = nla_total_size(sizeof(size)); |
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len += NLMSG_ALIGN(sizeof(*header)); |
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skb = nlmsg_new(len, GFP_KERNEL); |
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if (!skb) |
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return -ENOMEM; |
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data = ibnl_put_msg(skb, &nlh, seq, 0, RDMA_NL_LS, |
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RDMA_NL_LS_OP_IP_RESOLVE, NLM_F_REQUEST); |
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if (!data) { |
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nlmsg_free(skb); |
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return -ENODATA; |
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} |
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/* Construct the family header first */ |
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header = skb_put(skb, NLMSG_ALIGN(sizeof(*header))); |
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header->ifindex = dev_addr->bound_dev_if; |
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nla_put(skb, attrtype, size, daddr); |
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|
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/* Repair the nlmsg header length */ |
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nlmsg_end(skb, nlh); |
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rdma_nl_multicast(&init_net, skb, RDMA_NL_GROUP_LS, GFP_KERNEL); |
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|
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/* Make the request retry, so when we get the response from userspace |
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* we will have something. |
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*/ |
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return -ENODATA; |
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} |
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int rdma_addr_size(const struct sockaddr *addr) |
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{ |
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switch (addr->sa_family) { |
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case AF_INET: |
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return sizeof(struct sockaddr_in); |
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case AF_INET6: |
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return sizeof(struct sockaddr_in6); |
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case AF_IB: |
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return sizeof(struct sockaddr_ib); |
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default: |
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return 0; |
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} |
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} |
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EXPORT_SYMBOL(rdma_addr_size); |
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int rdma_addr_size_in6(struct sockaddr_in6 *addr) |
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{ |
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int ret = rdma_addr_size((struct sockaddr *) addr); |
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return ret <= sizeof(*addr) ? ret : 0; |
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} |
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EXPORT_SYMBOL(rdma_addr_size_in6); |
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int rdma_addr_size_kss(struct __kernel_sockaddr_storage *addr) |
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{ |
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int ret = rdma_addr_size((struct sockaddr *) addr); |
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|
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return ret <= sizeof(*addr) ? ret : 0; |
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} |
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EXPORT_SYMBOL(rdma_addr_size_kss); |
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/** |
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* rdma_copy_src_l2_addr - Copy netdevice source addresses |
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* @dev_addr: Destination address pointer where to copy the addresses |
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* @dev: Netdevice whose source addresses to copy |
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* |
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* rdma_copy_src_l2_addr() copies source addresses from the specified netdevice. |
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* This includes unicast address, broadcast address, device type and |
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* interface index. |
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*/ |
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void rdma_copy_src_l2_addr(struct rdma_dev_addr *dev_addr, |
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const struct net_device *dev) |
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{ |
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dev_addr->dev_type = dev->type; |
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memcpy(dev_addr->src_dev_addr, dev->dev_addr, MAX_ADDR_LEN); |
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memcpy(dev_addr->broadcast, dev->broadcast, MAX_ADDR_LEN); |
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dev_addr->bound_dev_if = dev->ifindex; |
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} |
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EXPORT_SYMBOL(rdma_copy_src_l2_addr); |
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static struct net_device * |
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rdma_find_ndev_for_src_ip_rcu(struct net *net, const struct sockaddr *src_in) |
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{ |
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struct net_device *dev = NULL; |
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int ret = -EADDRNOTAVAIL; |
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switch (src_in->sa_family) { |
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case AF_INET: |
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dev = __ip_dev_find(net, |
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((const struct sockaddr_in *)src_in)->sin_addr.s_addr, |
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false); |
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if (dev) |
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ret = 0; |
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break; |
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#if IS_ENABLED(CONFIG_IPV6) |
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case AF_INET6: |
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for_each_netdev_rcu(net, dev) { |
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if (ipv6_chk_addr(net, |
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&((const struct sockaddr_in6 *)src_in)->sin6_addr, |
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dev, 1)) { |
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ret = 0; |
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break; |
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} |
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} |
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break; |
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#endif |
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} |
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return ret ? ERR_PTR(ret) : dev; |
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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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struct net_device *dev; |
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if (dev_addr->bound_dev_if) { |
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dev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if); |
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if (!dev) |
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return -ENODEV; |
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rdma_copy_src_l2_addr(dev_addr, dev); |
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dev_put(dev); |
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return 0; |
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} |
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rcu_read_lock(); |
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dev = rdma_find_ndev_for_src_ip_rcu(dev_addr->net, addr); |
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if (!IS_ERR(dev)) |
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rdma_copy_src_l2_addr(dev_addr, dev); |
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rcu_read_unlock(); |
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return PTR_ERR_OR_ZERO(dev); |
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} |
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EXPORT_SYMBOL(rdma_translate_ip); |
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|
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static void set_timeout(struct addr_req *req, unsigned long time) |
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{ |
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unsigned long delay; |
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delay = time - jiffies; |
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if ((long)delay < 0) |
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delay = 0; |
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mod_delayed_work(addr_wq, &req->work, delay); |
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} |
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|
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static void queue_req(struct addr_req *req) |
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{ |
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spin_lock_bh(&lock); |
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list_add_tail(&req->list, &req_list); |
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set_timeout(req, req->timeout); |
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spin_unlock_bh(&lock); |
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} |
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static int ib_nl_fetch_ha(struct rdma_dev_addr *dev_addr, |
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const void *daddr, u32 seq, u16 family) |
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{ |
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if (!rdma_nl_chk_listeners(RDMA_NL_GROUP_LS)) |
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return -EADDRNOTAVAIL; |
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return ib_nl_ip_send_msg(dev_addr, daddr, seq, family); |
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} |
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static int dst_fetch_ha(const struct dst_entry *dst, |
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struct rdma_dev_addr *dev_addr, |
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const void *daddr) |
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{ |
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struct neighbour *n; |
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int ret = 0; |
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n = dst_neigh_lookup(dst, daddr); |
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if (!n) |
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return -ENODATA; |
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|
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if (!(n->nud_state & NUD_VALID)) { |
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neigh_event_send(n, NULL); |
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ret = -ENODATA; |
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} else { |
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neigh_ha_snapshot(dev_addr->dst_dev_addr, n, dst->dev); |
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} |
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neigh_release(n); |
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return ret; |
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} |
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static bool has_gateway(const struct dst_entry *dst, sa_family_t family) |
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{ |
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struct rtable *rt; |
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struct rt6_info *rt6; |
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|
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if (family == AF_INET) { |
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rt = container_of(dst, struct rtable, dst); |
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return rt->rt_uses_gateway; |
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} |
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|
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rt6 = container_of(dst, struct rt6_info, dst); |
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return rt6->rt6i_flags & RTF_GATEWAY; |
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} |
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|
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static int fetch_ha(const struct dst_entry *dst, struct rdma_dev_addr *dev_addr, |
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const struct sockaddr *dst_in, u32 seq) |
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{ |
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const struct sockaddr_in *dst_in4 = |
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(const struct sockaddr_in *)dst_in; |
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const struct sockaddr_in6 *dst_in6 = |
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(const struct sockaddr_in6 *)dst_in; |
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const void *daddr = (dst_in->sa_family == AF_INET) ? |
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(const void *)&dst_in4->sin_addr.s_addr : |
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(const void *)&dst_in6->sin6_addr; |
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sa_family_t family = dst_in->sa_family; |
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|
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might_sleep(); |
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|
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/* If we have a gateway in IB mode then it must be an IB network */ |
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if (has_gateway(dst, family) && dev_addr->network == RDMA_NETWORK_IB) |
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return ib_nl_fetch_ha(dev_addr, daddr, seq, family); |
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else |
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return dst_fetch_ha(dst, dev_addr, daddr); |
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} |
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|
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static int addr4_resolve(struct sockaddr *src_sock, |
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const struct sockaddr *dst_sock, |
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struct rdma_dev_addr *addr, |
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struct rtable **prt) |
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{ |
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struct sockaddr_in *src_in = (struct sockaddr_in *)src_sock; |
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const struct sockaddr_in *dst_in = |
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(const struct sockaddr_in *)dst_sock; |
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|
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__be32 src_ip = src_in->sin_addr.s_addr; |
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__be32 dst_ip = dst_in->sin_addr.s_addr; |
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struct rtable *rt; |
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struct flowi4 fl4; |
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int ret; |
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|
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memset(&fl4, 0, sizeof(fl4)); |
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fl4.daddr = dst_ip; |
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fl4.saddr = src_ip; |
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fl4.flowi4_oif = addr->bound_dev_if; |
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rt = ip_route_output_key(addr->net, &fl4); |
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ret = PTR_ERR_OR_ZERO(rt); |
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if (ret) |
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return ret; |
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src_in->sin_addr.s_addr = fl4.saddr; |
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|
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addr->hoplimit = ip4_dst_hoplimit(&rt->dst); |
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|
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*prt = rt; |
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return 0; |
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} |
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|
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#if IS_ENABLED(CONFIG_IPV6) |
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static int addr6_resolve(struct sockaddr *src_sock, |
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const struct sockaddr *dst_sock, |
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struct rdma_dev_addr *addr, |
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struct dst_entry **pdst) |
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{ |
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struct sockaddr_in6 *src_in = (struct sockaddr_in6 *)src_sock; |
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const struct sockaddr_in6 *dst_in = |
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(const struct sockaddr_in6 *)dst_sock; |
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struct flowi6 fl6; |
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struct dst_entry *dst; |
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|
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memset(&fl6, 0, sizeof fl6); |
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fl6.daddr = dst_in->sin6_addr; |
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fl6.saddr = src_in->sin6_addr; |
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fl6.flowi6_oif = addr->bound_dev_if; |
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|
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dst = ipv6_stub->ipv6_dst_lookup_flow(addr->net, NULL, &fl6, NULL); |
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if (IS_ERR(dst)) |
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return PTR_ERR(dst); |
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|
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if (ipv6_addr_any(&src_in->sin6_addr)) |
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src_in->sin6_addr = fl6.saddr; |
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|
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addr->hoplimit = ip6_dst_hoplimit(dst); |
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|
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*pdst = dst; |
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return 0; |
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} |
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#else |
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static int addr6_resolve(struct sockaddr *src_sock, |
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const struct sockaddr *dst_sock, |
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struct rdma_dev_addr *addr, |
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struct dst_entry **pdst) |
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{ |
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return -EADDRNOTAVAIL; |
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} |
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#endif |
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|
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static int addr_resolve_neigh(const struct dst_entry *dst, |
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const struct sockaddr *dst_in, |
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struct rdma_dev_addr *addr, |
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unsigned int ndev_flags, |
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u32 seq) |
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{ |
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int ret = 0; |
|
|
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if (ndev_flags & IFF_LOOPBACK) { |
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memcpy(addr->dst_dev_addr, addr->src_dev_addr, MAX_ADDR_LEN); |
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} else { |
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if (!(ndev_flags & IFF_NOARP)) { |
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/* If the device doesn't do ARP internally */ |
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ret = fetch_ha(dst, addr, dst_in, seq); |
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} |
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} |
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return ret; |
|
} |
|
|
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static int copy_src_l2_addr(struct rdma_dev_addr *dev_addr, |
|
const struct sockaddr *dst_in, |
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const struct dst_entry *dst, |
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const struct net_device *ndev) |
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{ |
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int ret = 0; |
|
|
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if (dst->dev->flags & IFF_LOOPBACK) |
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ret = rdma_translate_ip(dst_in, dev_addr); |
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else |
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rdma_copy_src_l2_addr(dev_addr, dst->dev); |
|
|
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/* |
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* If there's a gateway and type of device not ARPHRD_INFINIBAND, |
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* we're definitely in RoCE v2 (as RoCE v1 isn't routable) set the |
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* network type accordingly. |
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*/ |
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if (has_gateway(dst, dst_in->sa_family) && |
|
ndev->type != ARPHRD_INFINIBAND) |
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dev_addr->network = dst_in->sa_family == AF_INET ? |
|
RDMA_NETWORK_IPV4 : |
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RDMA_NETWORK_IPV6; |
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else |
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dev_addr->network = RDMA_NETWORK_IB; |
|
|
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return ret; |
|
} |
|
|
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static int rdma_set_src_addr_rcu(struct rdma_dev_addr *dev_addr, |
|
unsigned int *ndev_flags, |
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const struct sockaddr *dst_in, |
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const struct dst_entry *dst) |
|
{ |
|
struct net_device *ndev = READ_ONCE(dst->dev); |
|
|
|
*ndev_flags = ndev->flags; |
|
/* A physical device must be the RDMA device to use */ |
|
if (ndev->flags & IFF_LOOPBACK) { |
|
/* |
|
* RDMA (IB/RoCE, iWarp) doesn't run on lo interface or |
|
* loopback IP address. So if route is resolved to loopback |
|
* interface, translate that to a real ndev based on non |
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* loopback IP address. |
|
*/ |
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ndev = rdma_find_ndev_for_src_ip_rcu(dev_net(ndev), dst_in); |
|
if (IS_ERR(ndev)) |
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return -ENODEV; |
|
} |
|
|
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return copy_src_l2_addr(dev_addr, dst_in, dst, ndev); |
|
} |
|
|
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static int set_addr_netns_by_gid_rcu(struct rdma_dev_addr *addr) |
|
{ |
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struct net_device *ndev; |
|
|
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ndev = rdma_read_gid_attr_ndev_rcu(addr->sgid_attr); |
|
if (IS_ERR(ndev)) |
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return PTR_ERR(ndev); |
|
|
|
/* |
|
* Since we are holding the rcu, reading net and ifindex |
|
* are safe without any additional reference; because |
|
* change_net_namespace() in net/core/dev.c does rcu sync |
|
* after it changes the state to IFF_DOWN and before |
|
* updating netdev fields {net, ifindex}. |
|
*/ |
|
addr->net = dev_net(ndev); |
|
addr->bound_dev_if = ndev->ifindex; |
|
return 0; |
|
} |
|
|
|
static void rdma_addr_set_net_defaults(struct rdma_dev_addr *addr) |
|
{ |
|
addr->net = &init_net; |
|
addr->bound_dev_if = 0; |
|
} |
|
|
|
static int addr_resolve(struct sockaddr *src_in, |
|
const struct sockaddr *dst_in, |
|
struct rdma_dev_addr *addr, |
|
bool resolve_neigh, |
|
bool resolve_by_gid_attr, |
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u32 seq) |
|
{ |
|
struct dst_entry *dst = NULL; |
|
unsigned int ndev_flags = 0; |
|
struct rtable *rt = NULL; |
|
int ret; |
|
|
|
if (!addr->net) { |
|
pr_warn_ratelimited("%s: missing namespace\n", __func__); |
|
return -EINVAL; |
|
} |
|
|
|
rcu_read_lock(); |
|
if (resolve_by_gid_attr) { |
|
if (!addr->sgid_attr) { |
|
rcu_read_unlock(); |
|
pr_warn_ratelimited("%s: missing gid_attr\n", __func__); |
|
return -EINVAL; |
|
} |
|
/* |
|
* If the request is for a specific gid attribute of the |
|
* rdma_dev_addr, derive net from the netdevice of the |
|
* GID attribute. |
|
*/ |
|
ret = set_addr_netns_by_gid_rcu(addr); |
|
if (ret) { |
|
rcu_read_unlock(); |
|
return ret; |
|
} |
|
} |
|
if (src_in->sa_family == AF_INET) { |
|
ret = addr4_resolve(src_in, dst_in, addr, &rt); |
|
dst = &rt->dst; |
|
} else { |
|
ret = addr6_resolve(src_in, dst_in, addr, &dst); |
|
} |
|
if (ret) { |
|
rcu_read_unlock(); |
|
goto done; |
|
} |
|
ret = rdma_set_src_addr_rcu(addr, &ndev_flags, dst_in, dst); |
|
rcu_read_unlock(); |
|
|
|
/* |
|
* Resolve neighbor destination address if requested and |
|
* only if src addr translation didn't fail. |
|
*/ |
|
if (!ret && resolve_neigh) |
|
ret = addr_resolve_neigh(dst, dst_in, addr, ndev_flags, seq); |
|
|
|
if (src_in->sa_family == AF_INET) |
|
ip_rt_put(rt); |
|
else |
|
dst_release(dst); |
|
done: |
|
/* |
|
* Clear the addr net to go back to its original state, only if it was |
|
* derived from GID attribute in this context. |
|
*/ |
|
if (resolve_by_gid_attr) |
|
rdma_addr_set_net_defaults(addr); |
|
return ret; |
|
} |
|
|
|
static void process_one_req(struct work_struct *_work) |
|
{ |
|
struct addr_req *req; |
|
struct sockaddr *src_in, *dst_in; |
|
|
|
req = container_of(_work, struct addr_req, work.work); |
|
|
|
if (req->status == -ENODATA) { |
|
src_in = (struct sockaddr *)&req->src_addr; |
|
dst_in = (struct sockaddr *)&req->dst_addr; |
|
req->status = addr_resolve(src_in, dst_in, req->addr, |
|
true, req->resolve_by_gid_attr, |
|
req->seq); |
|
if (req->status && time_after_eq(jiffies, req->timeout)) { |
|
req->status = -ETIMEDOUT; |
|
} else if (req->status == -ENODATA) { |
|
/* requeue the work for retrying again */ |
|
spin_lock_bh(&lock); |
|
if (!list_empty(&req->list)) |
|
set_timeout(req, req->timeout); |
|
spin_unlock_bh(&lock); |
|
return; |
|
} |
|
} |
|
|
|
req->callback(req->status, (struct sockaddr *)&req->src_addr, |
|
req->addr, req->context); |
|
req->callback = NULL; |
|
|
|
spin_lock_bh(&lock); |
|
/* |
|
* Although the work will normally have been canceled by the workqueue, |
|
* it can still be requeued as long as it is on the req_list. |
|
*/ |
|
cancel_delayed_work(&req->work); |
|
if (!list_empty(&req->list)) { |
|
list_del_init(&req->list); |
|
kfree(req); |
|
} |
|
spin_unlock_bh(&lock); |
|
} |
|
|
|
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) |
|
{ |
|
struct sockaddr *src_in, *dst_in; |
|
struct addr_req *req; |
|
int ret = 0; |
|
|
|
req = kzalloc(sizeof *req, GFP_KERNEL); |
|
if (!req) |
|
return -ENOMEM; |
|
|
|
src_in = (struct sockaddr *) &req->src_addr; |
|
dst_in = (struct sockaddr *) &req->dst_addr; |
|
|
|
if (src_addr) { |
|
if (src_addr->sa_family != dst_addr->sa_family) { |
|
ret = -EINVAL; |
|
goto err; |
|
} |
|
|
|
memcpy(src_in, src_addr, rdma_addr_size(src_addr)); |
|
} else { |
|
src_in->sa_family = dst_addr->sa_family; |
|
} |
|
|
|
memcpy(dst_in, dst_addr, rdma_addr_size(dst_addr)); |
|
req->addr = addr; |
|
req->callback = callback; |
|
req->context = context; |
|
req->resolve_by_gid_attr = resolve_by_gid_attr; |
|
INIT_DELAYED_WORK(&req->work, process_one_req); |
|
req->seq = (u32)atomic_inc_return(&ib_nl_addr_request_seq); |
|
|
|
req->status = addr_resolve(src_in, dst_in, addr, true, |
|
req->resolve_by_gid_attr, req->seq); |
|
switch (req->status) { |
|
case 0: |
|
req->timeout = jiffies; |
|
queue_req(req); |
|
break; |
|
case -ENODATA: |
|
req->timeout = msecs_to_jiffies(timeout_ms) + jiffies; |
|
queue_req(req); |
|
break; |
|
default: |
|
ret = req->status; |
|
goto err; |
|
} |
|
return ret; |
|
err: |
|
kfree(req); |
|
return ret; |
|
} |
|
EXPORT_SYMBOL(rdma_resolve_ip); |
|
|
|
int roce_resolve_route_from_path(struct sa_path_rec *rec, |
|
const struct ib_gid_attr *attr) |
|
{ |
|
union { |
|
struct sockaddr _sockaddr; |
|
struct sockaddr_in _sockaddr_in; |
|
struct sockaddr_in6 _sockaddr_in6; |
|
} sgid, dgid; |
|
struct rdma_dev_addr dev_addr = {}; |
|
int ret; |
|
|
|
might_sleep(); |
|
|
|
if (rec->roce.route_resolved) |
|
return 0; |
|
|
|
rdma_gid2ip((struct sockaddr *)&sgid, &rec->sgid); |
|
rdma_gid2ip((struct sockaddr *)&dgid, &rec->dgid); |
|
|
|
if (sgid._sockaddr.sa_family != dgid._sockaddr.sa_family) |
|
return -EINVAL; |
|
|
|
if (!attr || !attr->ndev) |
|
return -EINVAL; |
|
|
|
dev_addr.net = &init_net; |
|
dev_addr.sgid_attr = attr; |
|
|
|
ret = addr_resolve((struct sockaddr *)&sgid, (struct sockaddr *)&dgid, |
|
&dev_addr, false, true, 0); |
|
if (ret) |
|
return ret; |
|
|
|
if ((dev_addr.network == RDMA_NETWORK_IPV4 || |
|
dev_addr.network == RDMA_NETWORK_IPV6) && |
|
rec->rec_type != SA_PATH_REC_TYPE_ROCE_V2) |
|
return -EINVAL; |
|
|
|
rec->roce.route_resolved = true; |
|
return 0; |
|
} |
|
|
|
/** |
|
* rdma_addr_cancel - Cancel resolve ip request |
|
* @addr: Pointer to address structure given previously |
|
* during rdma_resolve_ip(). |
|
* rdma_addr_cancel() is synchronous function which cancels any pending |
|
* request if there is any. |
|
*/ |
|
void rdma_addr_cancel(struct rdma_dev_addr *addr) |
|
{ |
|
struct addr_req *req, *temp_req; |
|
struct addr_req *found = NULL; |
|
|
|
spin_lock_bh(&lock); |
|
list_for_each_entry_safe(req, temp_req, &req_list, list) { |
|
if (req->addr == addr) { |
|
/* |
|
* Removing from the list means we take ownership of |
|
* the req |
|
*/ |
|
list_del_init(&req->list); |
|
found = req; |
|
break; |
|
} |
|
} |
|
spin_unlock_bh(&lock); |
|
|
|
if (!found) |
|
return; |
|
|
|
/* |
|
* sync canceling the work after removing it from the req_list |
|
* guarentees no work is running and none will be started. |
|
*/ |
|
cancel_delayed_work_sync(&found->work); |
|
kfree(found); |
|
} |
|
EXPORT_SYMBOL(rdma_addr_cancel); |
|
|
|
struct resolve_cb_context { |
|
struct completion comp; |
|
int status; |
|
}; |
|
|
|
static void resolve_cb(int status, struct sockaddr *src_addr, |
|
struct rdma_dev_addr *addr, void *context) |
|
{ |
|
((struct resolve_cb_context *)context)->status = status; |
|
complete(&((struct resolve_cb_context *)context)->comp); |
|
} |
|
|
|
int rdma_addr_find_l2_eth_by_grh(const union ib_gid *sgid, |
|
const union ib_gid *dgid, |
|
u8 *dmac, const struct ib_gid_attr *sgid_attr, |
|
int *hoplimit) |
|
{ |
|
struct rdma_dev_addr dev_addr; |
|
struct resolve_cb_context ctx; |
|
union { |
|
struct sockaddr_in _sockaddr_in; |
|
struct sockaddr_in6 _sockaddr_in6; |
|
} sgid_addr, dgid_addr; |
|
int ret; |
|
|
|
rdma_gid2ip((struct sockaddr *)&sgid_addr, sgid); |
|
rdma_gid2ip((struct sockaddr *)&dgid_addr, dgid); |
|
|
|
memset(&dev_addr, 0, sizeof(dev_addr)); |
|
dev_addr.net = &init_net; |
|
dev_addr.sgid_attr = sgid_attr; |
|
|
|
init_completion(&ctx.comp); |
|
ret = rdma_resolve_ip((struct sockaddr *)&sgid_addr, |
|
(struct sockaddr *)&dgid_addr, &dev_addr, 1000, |
|
resolve_cb, true, &ctx); |
|
if (ret) |
|
return ret; |
|
|
|
wait_for_completion(&ctx.comp); |
|
|
|
ret = ctx.status; |
|
if (ret) |
|
return ret; |
|
|
|
memcpy(dmac, dev_addr.dst_dev_addr, ETH_ALEN); |
|
*hoplimit = dev_addr.hoplimit; |
|
return 0; |
|
} |
|
|
|
static int netevent_callback(struct notifier_block *self, unsigned long event, |
|
void *ctx) |
|
{ |
|
struct addr_req *req; |
|
|
|
if (event == NETEVENT_NEIGH_UPDATE) { |
|
struct neighbour *neigh = ctx; |
|
|
|
if (neigh->nud_state & NUD_VALID) { |
|
spin_lock_bh(&lock); |
|
list_for_each_entry(req, &req_list, list) |
|
set_timeout(req, jiffies); |
|
spin_unlock_bh(&lock); |
|
} |
|
} |
|
return 0; |
|
} |
|
|
|
static struct notifier_block nb = { |
|
.notifier_call = netevent_callback |
|
}; |
|
|
|
int addr_init(void) |
|
{ |
|
addr_wq = alloc_ordered_workqueue("ib_addr", 0); |
|
if (!addr_wq) |
|
return -ENOMEM; |
|
|
|
register_netevent_notifier(&nb); |
|
|
|
return 0; |
|
} |
|
|
|
void addr_cleanup(void) |
|
{ |
|
unregister_netevent_notifier(&nb); |
|
destroy_workqueue(addr_wq); |
|
WARN_ON(!list_empty(&req_list)); |
|
}
|
|
|