cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

diag.c (3592B)

      1/*
      2 * net/tipc/diag.c: TIPC socket diag
      3 *
      4 * Copyright (c) 2018, Ericsson AB
      5 * All rights reserved.
      6 *
      7 * Redistribution and use in source and binary forms, with or without
      8 * modification, are permitted provided that the following conditions are met:
      9 *
     10 * 1. Redistributions of source code must retain the above copyright
     11 *    notice, this list of conditions and the following disclaimer.
     12 * 2. Redistributions in binary form must reproduce the above copyright
     13 *    notice, this list of conditions and the following disclaimer in the
     14 *    documentation and/or other materials provided with the distribution.
     15 * 3. Neither the names of the copyright holders nor the names of its
     16 *    contributors may be used to endorse or promote products derived from
     17 *    this software without specific prior written permission.
     18 *
     19 * Alternatively, this software may be distributed under the terms of the
     20 * GNU General Public License ("GPL") version 2 as published by the Free
     21 * Software Foundation.
     22 *
     23 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "ASIS"
     24 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE
     25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
     27 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     33 * POSSIBILITY OF SUCH DAMAGE.
     34 */
     35
     36#include "core.h"
     37#include "socket.h"
     38#include <linux/sock_diag.h>
     39#include <linux/tipc_sockets_diag.h>
     40
     41static u64 __tipc_diag_gen_cookie(struct sock *sk)
     42{
     43	u32 res[2];
     44
     45	sock_diag_save_cookie(sk, res);
     46	return *((u64 *)res);
     47}
     48
     49static int __tipc_add_sock_diag(struct sk_buff *skb,
     50				struct netlink_callback *cb,
     51				struct tipc_sock *tsk)
     52{
     53	struct tipc_sock_diag_req *req = nlmsg_data(cb->nlh);
     54	struct nlmsghdr *nlh;
     55	int err;
     56
     57	nlh = nlmsg_put_answer(skb, cb, SOCK_DIAG_BY_FAMILY, 0,
     58			       NLM_F_MULTI);
     59	if (!nlh)
     60		return -EMSGSIZE;
     61
     62	err = tipc_sk_fill_sock_diag(skb, cb, tsk, req->tidiag_states,
     63				     __tipc_diag_gen_cookie);
     64	if (err)
     65		return err;
     66
     67	nlmsg_end(skb, nlh);
     68	return 0;
     69}
     70
     71static int tipc_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
     72{
     73	return tipc_nl_sk_walk(skb, cb, __tipc_add_sock_diag);
     74}
     75
     76static int tipc_sock_diag_handler_dump(struct sk_buff *skb,
     77				       struct nlmsghdr *h)
     78{
     79	int hdrlen = sizeof(struct tipc_sock_diag_req);
     80	struct net *net = sock_net(skb->sk);
     81
     82	if (nlmsg_len(h) < hdrlen)
     83		return -EINVAL;
     84
     85	if (h->nlmsg_flags & NLM_F_DUMP) {
     86		struct netlink_dump_control c = {
     87			.start = tipc_dump_start,
     88			.dump = tipc_diag_dump,
     89			.done = tipc_dump_done,
     90		};
     91		netlink_dump_start(net->diag_nlsk, skb, h, &c);
     92		return 0;
     93	}
     94	return -EOPNOTSUPP;
     95}
     96
     97static const struct sock_diag_handler tipc_sock_diag_handler = {
     98	.family = AF_TIPC,
     99	.dump = tipc_sock_diag_handler_dump,
    100};
    101
    102static int __init tipc_diag_init(void)
    103{
    104	return sock_diag_register(&tipc_sock_diag_handler);
    105}
    106
    107static void __exit tipc_diag_exit(void)
    108{
    109	sock_diag_unregister(&tipc_sock_diag_handler);
    110}
    111
    112module_init(tipc_diag_init);
    113module_exit(tipc_diag_exit);
    114
    115MODULE_LICENSE("Dual BSD/GPL");
    116MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, AF_TIPC);