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inet_diag: add support for tw_mark 

Timewait sockets have included mark since approx 4.18.

Cc: Eric Dumazet <edumazet@google.com>
Cc: Jon Maxwell <jmaxwell37@gmail.com>
Fixes: 0048369055 ("tcp: Add mark for TIMEWAIT sockets")
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Jon Maxwell <jmaxwell37@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Maciej Żenczykowski 2021-06-15 23:06:04 -07:00 committed by David S. Miller
parent 1d0bbbf22b
commit 1b3fc77176
1 changed files with 10 additions and 2 deletions
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12
net/ipv4/inet_diag.c
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@ -416,7 +416,7 @@ EXPORT_SYMBOL_GPL(inet_sk_diag_fill);
static int inet_twsk_diag_fill(struct sock *sk,
struct sk_buff *skb,
struct netlink_callback *cb,
u16 nlmsg_flags)
u16 nlmsg_flags, bool net_admin)
{
struct inet_timewait_sock *tw = inet_twsk(sk);
struct inet_diag_msg *r;
@ -444,6 +444,12 @@ static int inet_twsk_diag_fill(struct sock *sk,
r->idiag_uid = 0;
r->idiag_inode = 0;
if (net_admin && nla_put_u32(skb, INET_DIAG_MARK,
tw->tw_mark)) {
nlmsg_cancel(skb, nlh);
return -EMSGSIZE;
}
nlmsg_end(skb, nlh);
return 0;
}
@ -494,7 +500,7 @@ static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
u16 nlmsg_flags, bool net_admin)
{
if (sk->sk_state == TCP_TIME_WAIT)
return inet_twsk_diag_fill(sk, skb, cb, nlmsg_flags);
return inet_twsk_diag_fill(sk, skb, cb, nlmsg_flags, net_admin);
if (sk->sk_state == TCP_NEW_SYN_RECV)
return inet_req_diag_fill(sk, skb, cb, nlmsg_flags, net_admin);
@ -801,6 +807,8 @@ int inet_diag_bc_sk(const struct nlattr *bc, struct sock *sk)
entry.mark = sk->sk_mark;
else if (sk->sk_state == TCP_NEW_SYN_RECV)
entry.mark = inet_rsk(inet_reqsk(sk))->ir_mark;
else if (sk->sk_state == TCP_TIME_WAIT)
entry.mark = inet_twsk(sk)->tw_mark;
else
entry.mark = 0;
#ifdef CONFIG_SOCK_CGROUP_DATA