From 3fd22af808f4d7455ba91596d334438c7ee0f889 Mon Sep 17 00:00:00 2001 From: Craig Gallek Date: Mon, 15 Jun 2015 11:26:19 -0400 Subject: [PATCH] sock_diag: specify info_size per inet protocol Previously, there was no clear distinction between the inet protocols that used struct tcp_info to report information and those that didn't. This change adds a specific size attribute to the inet_diag_handler struct which defines these interfaces. This will make dispatching sock_diag get_info requests identical for all inet protocols in a following patch. Tested: ss -au Tested: ss -at Signed-off-by: Craig Gallek Acked-by: Eric Dumazet Signed-off-by: David S. Miller --- include/linux/inet_diag.h | 1 + net/dccp/diag.c | 1 + net/ipv4/inet_diag.c | 4 ++-- net/ipv4/tcp_diag.c | 1 + net/ipv4/udp_diag.c | 2 ++ 5 files changed, 7 insertions(+), 2 deletions(-) diff --git a/include/linux/inet_diag.h b/include/linux/inet_diag.h index ac48b10c9395..0e707f0c1a3e 100644 --- a/include/linux/inet_diag.h +++ b/include/linux/inet_diag.h @@ -24,6 +24,7 @@ struct inet_diag_handler { struct inet_diag_msg *r, void *info); __u16 idiag_type; + __u16 idiag_info_size; }; struct inet_connection_sock; diff --git a/net/dccp/diag.c b/net/dccp/diag.c index 5a45f8de5d99..2d84303ea6bf 100644 --- a/net/dccp/diag.c +++ b/net/dccp/diag.c @@ -66,6 +66,7 @@ static const struct inet_diag_handler dccp_diag_handler = { .dump_one = dccp_diag_dump_one, .idiag_get_info = dccp_diag_get_info, .idiag_type = IPPROTO_DCCP, + .idiag_info_size = sizeof(struct tcp_info), }; static int __init dccp_diag_init(void) diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c index 4d32262c7502..b1f01174bf32 100644 --- a/net/ipv4/inet_diag.c +++ b/net/ipv4/inet_diag.c @@ -200,9 +200,9 @@ int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk, } #undef EXPIRES_IN_MS - if (ext & (1 << (INET_DIAG_INFO - 1))) { + if ((ext & (1 << (INET_DIAG_INFO - 1))) && handler->idiag_info_size) { attr = nla_reserve(skb, INET_DIAG_INFO, - sizeof(struct tcp_info)); + handler->idiag_info_size); if (!attr) goto errout; diff --git a/net/ipv4/tcp_diag.c b/net/ipv4/tcp_diag.c index 79b34a0f4a4a..423e3881a40b 100644 --- a/net/ipv4/tcp_diag.c +++ b/net/ipv4/tcp_diag.c @@ -50,6 +50,7 @@ static const struct inet_diag_handler tcp_diag_handler = { .dump_one = tcp_diag_dump_one, .idiag_get_info = tcp_diag_get_info, .idiag_type = IPPROTO_TCP, + .idiag_info_size = sizeof(struct tcp_info), }; static int __init tcp_diag_init(void) diff --git a/net/ipv4/udp_diag.c b/net/ipv4/udp_diag.c index b763c39ae1d7..6116604bf6e8 100644 --- a/net/ipv4/udp_diag.c +++ b/net/ipv4/udp_diag.c @@ -170,6 +170,7 @@ static const struct inet_diag_handler udp_diag_handler = { .dump_one = udp_diag_dump_one, .idiag_get_info = udp_diag_get_info, .idiag_type = IPPROTO_UDP, + .idiag_info_size = 0, }; static void udplite_diag_dump(struct sk_buff *skb, struct netlink_callback *cb, @@ -190,6 +191,7 @@ static const struct inet_diag_handler udplite_diag_handler = { .dump_one = udplite_diag_dump_one, .idiag_get_info = udp_diag_get_info, .idiag_type = IPPROTO_UDPLITE, + .idiag_info_size = 0, }; static int __init udp_diag_init(void) -- 2.34.1