mirror of
https://github.com/torvalds/linux.git
synced 2024-11-10 06:01:57 +00:00
114b4bb1cc
Following patch is going to use RCU instead of sock_diag_table_mutex acquisition. This patch is a preparation, no change of behavior yet. Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Guillaume Nault <gnault@redhat.com> Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
119 lines
3.6 KiB
C
119 lines
3.6 KiB
C
/*
|
|
* net/tipc/diag.c: TIPC socket diag
|
|
*
|
|
* Copyright (c) 2018, Ericsson AB
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. Neither the names of the copyright holders nor the names of its
|
|
* contributors may be used to endorse or promote products derived from
|
|
* this software without specific prior written permission.
|
|
*
|
|
* Alternatively, this software may be distributed under the terms of the
|
|
* GNU General Public License ("GPL") version 2 as published by the Free
|
|
* Software Foundation.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "ASIS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include "core.h"
|
|
#include "socket.h"
|
|
#include <linux/sock_diag.h>
|
|
#include <linux/tipc_sockets_diag.h>
|
|
|
|
static u64 __tipc_diag_gen_cookie(struct sock *sk)
|
|
{
|
|
u32 res[2];
|
|
|
|
sock_diag_save_cookie(sk, res);
|
|
return *((u64 *)res);
|
|
}
|
|
|
|
static int __tipc_add_sock_diag(struct sk_buff *skb,
|
|
struct netlink_callback *cb,
|
|
struct tipc_sock *tsk)
|
|
{
|
|
struct tipc_sock_diag_req *req = nlmsg_data(cb->nlh);
|
|
struct nlmsghdr *nlh;
|
|
int err;
|
|
|
|
nlh = nlmsg_put_answer(skb, cb, SOCK_DIAG_BY_FAMILY, 0,
|
|
NLM_F_MULTI);
|
|
if (!nlh)
|
|
return -EMSGSIZE;
|
|
|
|
err = tipc_sk_fill_sock_diag(skb, cb, tsk, req->tidiag_states,
|
|
__tipc_diag_gen_cookie);
|
|
if (err)
|
|
return err;
|
|
|
|
nlmsg_end(skb, nlh);
|
|
return 0;
|
|
}
|
|
|
|
static int tipc_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
return tipc_nl_sk_walk(skb, cb, __tipc_add_sock_diag);
|
|
}
|
|
|
|
static int tipc_sock_diag_handler_dump(struct sk_buff *skb,
|
|
struct nlmsghdr *h)
|
|
{
|
|
int hdrlen = sizeof(struct tipc_sock_diag_req);
|
|
struct net *net = sock_net(skb->sk);
|
|
|
|
if (nlmsg_len(h) < hdrlen)
|
|
return -EINVAL;
|
|
|
|
if (h->nlmsg_flags & NLM_F_DUMP) {
|
|
struct netlink_dump_control c = {
|
|
.start = tipc_dump_start,
|
|
.dump = tipc_diag_dump,
|
|
.done = tipc_dump_done,
|
|
};
|
|
netlink_dump_start(net->diag_nlsk, skb, h, &c);
|
|
return 0;
|
|
}
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static const struct sock_diag_handler tipc_sock_diag_handler = {
|
|
.owner = THIS_MODULE,
|
|
.family = AF_TIPC,
|
|
.dump = tipc_sock_diag_handler_dump,
|
|
};
|
|
|
|
static int __init tipc_diag_init(void)
|
|
{
|
|
return sock_diag_register(&tipc_sock_diag_handler);
|
|
}
|
|
|
|
static void __exit tipc_diag_exit(void)
|
|
{
|
|
sock_diag_unregister(&tipc_sock_diag_handler);
|
|
}
|
|
|
|
module_init(tipc_diag_init);
|
|
module_exit(tipc_diag_exit);
|
|
|
|
MODULE_LICENSE("Dual BSD/GPL");
|
|
MODULE_DESCRIPTION("TIPC socket monitoring via SOCK_DIAG");
|
|
MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, AF_TIPC);
|