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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 <kraig@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Craig Gallek 2015-06-15 11:26:19 -04:00 committed by David S. Miller
parent eb4cb00852
commit 3fd22af808
5 changed files with 7 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/linux/inet_diag.h
View File

@ -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;

1
net/dccp/diag.c
View File

@ -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)

4
net/ipv4/inet_diag.c
View File

@ -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;

1
net/ipv4/tcp_diag.c
View File

@ -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)

2
net/ipv4/udp_diag.c
View File

@ -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)