mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-27 13:05:10 +07:00
471e705832
Signed-off-by: Honggang Li <honli@redhat.com> Acked-by: Sean Hefty <sean.hefty@intel.com> Signed-off-by: Doug Ledford <dledford@redhat.com>
559 lines
13 KiB
C
559 lines
13 KiB
C
/*
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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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#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/addrconf.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.h>
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MODULE_AUTHOR("Sean Hefty");
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MODULE_DESCRIPTION("IB Address Translation");
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MODULE_LICENSE("Dual BSD/GPL");
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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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struct rdma_addr_client *client;
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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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int status;
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};
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static void process_req(struct work_struct *work);
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static DEFINE_MUTEX(lock);
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static LIST_HEAD(req_list);
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static DECLARE_DELAYED_WORK(work, process_req);
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static struct workqueue_struct *addr_wq;
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int rdma_addr_size(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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static struct rdma_addr_client self;
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void rdma_addr_register_client(struct rdma_addr_client *client)
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{
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atomic_set(&client->refcount, 1);
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init_completion(&client->comp);
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}
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EXPORT_SYMBOL(rdma_addr_register_client);
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static inline void put_client(struct rdma_addr_client *client)
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{
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if (atomic_dec_and_test(&client->refcount))
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complete(&client->comp);
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}
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void rdma_addr_unregister_client(struct rdma_addr_client *client)
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{
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put_client(client);
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wait_for_completion(&client->comp);
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}
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EXPORT_SYMBOL(rdma_addr_unregister_client);
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int rdma_copy_addr(struct rdma_dev_addr *dev_addr, struct net_device *dev,
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const unsigned char *dst_dev_addr)
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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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if (dst_dev_addr)
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memcpy(dev_addr->dst_dev_addr, dst_dev_addr, MAX_ADDR_LEN);
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dev_addr->bound_dev_if = dev->ifindex;
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return 0;
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}
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EXPORT_SYMBOL(rdma_copy_addr);
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int rdma_translate_ip(struct sockaddr *addr, struct rdma_dev_addr *dev_addr,
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u16 *vlan_id)
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{
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struct net_device *dev;
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int ret = -EADDRNOTAVAIL;
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if (dev_addr->bound_dev_if) {
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dev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
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if (!dev)
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return -ENODEV;
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ret = rdma_copy_addr(dev_addr, dev, NULL);
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dev_put(dev);
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return ret;
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}
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switch (addr->sa_family) {
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case AF_INET:
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dev = ip_dev_find(&init_net,
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((struct sockaddr_in *) addr)->sin_addr.s_addr);
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if (!dev)
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return ret;
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ret = rdma_copy_addr(dev_addr, dev, NULL);
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if (vlan_id)
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*vlan_id = rdma_vlan_dev_vlan_id(dev);
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dev_put(dev);
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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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rcu_read_lock();
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for_each_netdev_rcu(&init_net, dev) {
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if (ipv6_chk_addr(&init_net,
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&((struct sockaddr_in6 *) addr)->sin6_addr,
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dev, 1)) {
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ret = rdma_copy_addr(dev_addr, dev, NULL);
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if (vlan_id)
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*vlan_id = rdma_vlan_dev_vlan_id(dev);
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break;
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}
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}
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rcu_read_unlock();
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break;
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#endif
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}
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return ret;
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}
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EXPORT_SYMBOL(rdma_translate_ip);
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static void set_timeout(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, &work, delay);
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}
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static void queue_req(struct addr_req *req)
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{
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struct addr_req *temp_req;
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mutex_lock(&lock);
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list_for_each_entry_reverse(temp_req, &req_list, list) {
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if (time_after_eq(req->timeout, temp_req->timeout))
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break;
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}
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list_add(&req->list, &temp_req->list);
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if (req_list.next == &req->list)
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set_timeout(req->timeout);
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mutex_unlock(&lock);
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}
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static int dst_fetch_ha(struct dst_entry *dst, struct rdma_dev_addr *dev_addr, void *daddr)
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{
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struct neighbour *n;
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int ret;
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n = dst_neigh_lookup(dst, daddr);
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rcu_read_lock();
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if (!n || !(n->nud_state & NUD_VALID)) {
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if (n)
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neigh_event_send(n, NULL);
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ret = -ENODATA;
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} else {
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ret = rdma_copy_addr(dev_addr, dst->dev, n->ha);
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}
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rcu_read_unlock();
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if (n)
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neigh_release(n);
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return ret;
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}
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static int addr4_resolve(struct sockaddr_in *src_in,
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struct sockaddr_in *dst_in,
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struct rdma_dev_addr *addr)
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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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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(&init_net, &fl4);
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if (IS_ERR(rt)) {
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ret = PTR_ERR(rt);
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goto out;
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}
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src_in->sin_family = AF_INET;
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src_in->sin_addr.s_addr = fl4.saddr;
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if (rt->dst.dev->flags & IFF_LOOPBACK) {
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ret = rdma_translate_ip((struct sockaddr *)dst_in, addr, NULL);
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if (!ret)
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memcpy(addr->dst_dev_addr, addr->src_dev_addr, MAX_ADDR_LEN);
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goto put;
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}
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/* If the device does ARP internally, return 'done' */
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if (rt->dst.dev->flags & IFF_NOARP) {
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ret = rdma_copy_addr(addr, rt->dst.dev, NULL);
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goto put;
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}
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ret = dst_fetch_ha(&rt->dst, addr, &fl4.daddr);
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put:
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ip_rt_put(rt);
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out:
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return ret;
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}
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#if IS_ENABLED(CONFIG_IPV6)
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static int addr6_resolve(struct sockaddr_in6 *src_in,
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struct sockaddr_in6 *dst_in,
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struct rdma_dev_addr *addr)
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{
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struct flowi6 fl6;
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struct dst_entry *dst;
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int ret;
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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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dst = ip6_route_output(&init_net, NULL, &fl6);
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if ((ret = dst->error))
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goto put;
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if (ipv6_addr_any(&fl6.saddr)) {
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ret = ipv6_dev_get_saddr(&init_net, ip6_dst_idev(dst)->dev,
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&fl6.daddr, 0, &fl6.saddr);
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if (ret)
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goto put;
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src_in->sin6_family = AF_INET6;
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src_in->sin6_addr = fl6.saddr;
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}
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if (dst->dev->flags & IFF_LOOPBACK) {
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ret = rdma_translate_ip((struct sockaddr *)dst_in, addr, NULL);
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if (!ret)
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memcpy(addr->dst_dev_addr, addr->src_dev_addr, MAX_ADDR_LEN);
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goto put;
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}
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/* If the device does ARP internally, return 'done' */
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if (dst->dev->flags & IFF_NOARP) {
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ret = rdma_copy_addr(addr, dst->dev, NULL);
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goto put;
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}
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ret = dst_fetch_ha(dst, addr, &fl6.daddr);
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put:
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dst_release(dst);
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return ret;
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}
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#else
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static int addr6_resolve(struct sockaddr_in6 *src_in,
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struct sockaddr_in6 *dst_in,
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struct rdma_dev_addr *addr)
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{
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return -EADDRNOTAVAIL;
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}
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#endif
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static int addr_resolve(struct sockaddr *src_in,
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struct sockaddr *dst_in,
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struct rdma_dev_addr *addr)
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{
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if (src_in->sa_family == AF_INET) {
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return addr4_resolve((struct sockaddr_in *) src_in,
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(struct sockaddr_in *) dst_in, addr);
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} else
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return addr6_resolve((struct sockaddr_in6 *) src_in,
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(struct sockaddr_in6 *) dst_in, addr);
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}
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static void process_req(struct work_struct *work)
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{
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struct addr_req *req, *temp_req;
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struct sockaddr *src_in, *dst_in;
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struct list_head done_list;
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INIT_LIST_HEAD(&done_list);
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mutex_lock(&lock);
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list_for_each_entry_safe(req, temp_req, &req_list, list) {
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if (req->status == -ENODATA) {
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src_in = (struct sockaddr *) &req->src_addr;
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dst_in = (struct sockaddr *) &req->dst_addr;
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req->status = addr_resolve(src_in, dst_in, req->addr);
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if (req->status && time_after_eq(jiffies, req->timeout))
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req->status = -ETIMEDOUT;
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else if (req->status == -ENODATA)
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continue;
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}
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list_move_tail(&req->list, &done_list);
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}
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if (!list_empty(&req_list)) {
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req = list_entry(req_list.next, struct addr_req, list);
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set_timeout(req->timeout);
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}
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mutex_unlock(&lock);
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list_for_each_entry_safe(req, temp_req, &done_list, list) {
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list_del(&req->list);
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req->callback(req->status, (struct sockaddr *) &req->src_addr,
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req->addr, req->context);
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put_client(req->client);
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kfree(req);
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}
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}
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int rdma_resolve_ip(struct rdma_addr_client *client,
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struct sockaddr *src_addr, struct sockaddr *dst_addr,
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struct rdma_dev_addr *addr, int 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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void *context)
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{
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struct sockaddr *src_in, *dst_in;
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struct addr_req *req;
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int ret = 0;
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req = kzalloc(sizeof *req, GFP_KERNEL);
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if (!req)
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return -ENOMEM;
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src_in = (struct sockaddr *) &req->src_addr;
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dst_in = (struct sockaddr *) &req->dst_addr;
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if (src_addr) {
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if (src_addr->sa_family != dst_addr->sa_family) {
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ret = -EINVAL;
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goto err;
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}
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memcpy(src_in, src_addr, rdma_addr_size(src_addr));
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} else {
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src_in->sa_family = dst_addr->sa_family;
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}
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memcpy(dst_in, dst_addr, rdma_addr_size(dst_addr));
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req->addr = addr;
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req->callback = callback;
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req->context = context;
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req->client = client;
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atomic_inc(&client->refcount);
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req->status = addr_resolve(src_in, dst_in, addr);
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switch (req->status) {
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case 0:
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req->timeout = jiffies;
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queue_req(req);
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break;
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case -ENODATA:
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req->timeout = msecs_to_jiffies(timeout_ms) + jiffies;
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queue_req(req);
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break;
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default:
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ret = req->status;
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atomic_dec(&client->refcount);
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goto err;
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}
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return ret;
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err:
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kfree(req);
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return ret;
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}
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EXPORT_SYMBOL(rdma_resolve_ip);
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void rdma_addr_cancel(struct rdma_dev_addr *addr)
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{
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struct addr_req *req, *temp_req;
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mutex_lock(&lock);
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list_for_each_entry_safe(req, temp_req, &req_list, list) {
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if (req->addr == addr) {
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req->status = -ECANCELED;
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req->timeout = jiffies;
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list_move(&req->list, &req_list);
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set_timeout(req->timeout);
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break;
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}
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}
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mutex_unlock(&lock);
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}
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EXPORT_SYMBOL(rdma_addr_cancel);
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struct resolve_cb_context {
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struct rdma_dev_addr *addr;
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struct completion comp;
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};
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static void resolve_cb(int status, struct sockaddr *src_addr,
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struct rdma_dev_addr *addr, void *context)
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{
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memcpy(((struct resolve_cb_context *)context)->addr, addr, sizeof(struct
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rdma_dev_addr));
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complete(&((struct resolve_cb_context *)context)->comp);
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}
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int rdma_addr_find_dmac_by_grh(union ib_gid *sgid, union ib_gid *dgid, u8 *dmac,
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u16 *vlan_id)
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{
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int ret = 0;
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struct rdma_dev_addr dev_addr;
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struct resolve_cb_context ctx;
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struct net_device *dev;
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union {
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struct sockaddr _sockaddr;
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struct sockaddr_in _sockaddr_in;
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struct sockaddr_in6 _sockaddr_in6;
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} sgid_addr, dgid_addr;
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rdma_gid2ip(&sgid_addr._sockaddr, sgid);
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rdma_gid2ip(&dgid_addr._sockaddr, dgid);
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memset(&dev_addr, 0, sizeof(dev_addr));
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ctx.addr = &dev_addr;
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init_completion(&ctx.comp);
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ret = rdma_resolve_ip(&self, &sgid_addr._sockaddr, &dgid_addr._sockaddr,
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&dev_addr, 1000, resolve_cb, &ctx);
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if (ret)
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return ret;
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wait_for_completion(&ctx.comp);
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memcpy(dmac, dev_addr.dst_dev_addr, ETH_ALEN);
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dev = dev_get_by_index(&init_net, dev_addr.bound_dev_if);
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if (!dev)
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return -ENODEV;
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if (vlan_id)
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*vlan_id = rdma_vlan_dev_vlan_id(dev);
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dev_put(dev);
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return ret;
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}
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EXPORT_SYMBOL(rdma_addr_find_dmac_by_grh);
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int rdma_addr_find_smac_by_sgid(union ib_gid *sgid, u8 *smac, u16 *vlan_id)
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{
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int ret = 0;
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struct rdma_dev_addr dev_addr;
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union {
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struct sockaddr _sockaddr;
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struct sockaddr_in _sockaddr_in;
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struct sockaddr_in6 _sockaddr_in6;
|
|
} gid_addr;
|
|
|
|
rdma_gid2ip(&gid_addr._sockaddr, sgid);
|
|
|
|
memset(&dev_addr, 0, sizeof(dev_addr));
|
|
ret = rdma_translate_ip(&gid_addr._sockaddr, &dev_addr, vlan_id);
|
|
if (ret)
|
|
return ret;
|
|
|
|
memcpy(smac, dev_addr.src_dev_addr, ETH_ALEN);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_addr_find_smac_by_sgid);
|
|
|
|
static int netevent_callback(struct notifier_block *self, unsigned long event,
|
|
void *ctx)
|
|
{
|
|
if (event == NETEVENT_NEIGH_UPDATE) {
|
|
struct neighbour *neigh = ctx;
|
|
|
|
if (neigh->nud_state & NUD_VALID) {
|
|
set_timeout(jiffies);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct notifier_block nb = {
|
|
.notifier_call = netevent_callback
|
|
};
|
|
|
|
static int __init addr_init(void)
|
|
{
|
|
addr_wq = create_singlethread_workqueue("ib_addr");
|
|
if (!addr_wq)
|
|
return -ENOMEM;
|
|
|
|
register_netevent_notifier(&nb);
|
|
rdma_addr_register_client(&self);
|
|
return 0;
|
|
}
|
|
|
|
static void __exit addr_cleanup(void)
|
|
{
|
|
rdma_addr_unregister_client(&self);
|
|
unregister_netevent_notifier(&nb);
|
|
destroy_workqueue(addr_wq);
|
|
}
|
|
|
|
module_init(addr_init);
|
|
module_exit(addr_cleanup);
|