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authorJason Xing <kernelxing@tencent.com>2023-02-14 07:14:10 +0300
committerDavid S. Miller <davem@davemloft.net>2023-02-15 13:25:21 +0300
commitfe33311c3e371855c4f4c0ab8a5fce5b9a9fdafd (patch)
tree781a78ac2b3b88d7825a1237c5026dbef511309f /net/ipv6
parent1ed32ad4a3cb7c6a8764510565e15ab46b5fdd19 (diff)
downloadlinux-fe33311c3e371855c4f4c0ab8a5fce5b9a9fdafd.tar.xz
net: no longer support SOCK_REFCNT_DEBUG feature
Commit e48c414ee61f ("[INET]: Generalise the TCP sock ID lookup routines") commented out the definition of SOCK_REFCNT_DEBUG in 2005 and later another commit 463c84b97f24 ("[NET]: Introduce inet_connection_sock") removed it. Since we could track all of them through bpf and kprobe related tools and the feature could print loads of information which might not be that helpful even under a little bit pressure, the whole feature which has been inactive for many years is no longer supported. Link: https://lore.kernel.org/lkml/20230211065153.54116-1-kerneljasonxing@gmail.com/ Suggested-by: Kuniyuki Iwashima <kuniyu@amazon.com> Signed-off-by: Jason Xing <kernelxing@tencent.com> Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com> Acked-by: Wenjia Zhang <wenjia@linux.ibm.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Acked-by: Matthieu Baerts <matthieu.baerts@tessares.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/af_inet6.c10
-rw-r--r--net/ipv6/ipv6_sockglue.c12
2 files changed, 0 insertions, 22 deletions
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 847934763868..38689bedfce7 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -239,16 +239,6 @@ lookup_protocol:
inet->pmtudisc = IP_PMTUDISC_DONT;
else
inet->pmtudisc = IP_PMTUDISC_WANT;
- /*
- * Increment only the relevant sk_prot->socks debug field, this changes
- * the previous behaviour of incrementing both the equivalent to
- * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
- *
- * This allows better debug granularity as we'll know exactly how many
- * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
- * transport protocol socks. -acme
- */
- sk_refcnt_debug_inc(sk);
if (inet->inet_num) {
/* It assumes that any protocol which allows
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c
index 9ce51680290b..2917dd8d198c 100644
--- a/net/ipv6/ipv6_sockglue.c
+++ b/net/ipv6/ipv6_sockglue.c
@@ -464,13 +464,6 @@ int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
__ipv6_sock_mc_close(sk);
__ipv6_sock_ac_close(sk);
- /*
- * Sock is moving from IPv6 to IPv4 (sk_prot), so
- * remove it from the refcnt debug socks count in the
- * original family...
- */
- sk_refcnt_debug_dec(sk);
-
if (sk->sk_protocol == IPPROTO_TCP) {
struct inet_connection_sock *icsk = inet_csk(sk);
@@ -507,11 +500,6 @@ int do_ipv6_setsockopt(struct sock *sk, int level, int optname,
inet6_cleanup_sock(sk);
- /*
- * ... and add it to the refcnt debug socks count
- * in the new family. -acme
- */
- sk_refcnt_debug_inc(sk);
module_put(THIS_MODULE);
retv = 0;
break;