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Date: Mon, 5 Oct 2015 15:55:26 -0400
From: Craig Gallek <kraigatgoog@...il.com>
To: Eric Dumazet <edumazet@...gle.com>,
Willem de Bruijn <willemb@...gle.com>,
Marcelo Ricardo Leitner <mleitner@...hat.com>
Cc: kraigatgoog@...il.com, David Miller <davem@...emloft.net>,
netdev@...r.kernel.org
Subject: [PATCH net-next 1/2] sock_diag: create udp_info for udp socket stats
From: Craig Gallek <kraig@...gle.com>
struct udp_info is intended to be the UDP equivalent of tcp_info for the
INET_DIAG_INFO netlink attribute of TCPDIAG_GETSOCK and
SOCK_DIAG_BY_FAMILY.
Unfortunately, since clients may assume that all instances of the
INET_DIAG_INFO response attribute are serialized versions of tcp_info,
we need to define a new response attribute (INET_DIAG_UDP_INFO) for
returning the new udp_info struct.
This patch prepares the netlink code to return INET_DIAG_UDP_INFO and
udp_info (currently size of zero).
Signed-off-by: Craig Gallek <kraig@...gle.com>
---
include/linux/inet_diag.h | 1 +
include/uapi/linux/inet_diag.h | 3 ++-
include/uapi/linux/udp.h | 3 +++
net/dccp/diag.c | 1 +
net/ipv4/inet_diag.c | 25 ++++++++++++-------------
net/ipv4/tcp_diag.c | 1 +
net/ipv4/udp_diag.c | 6 ++++--
7 files changed, 24 insertions(+), 16 deletions(-)
diff --git a/include/linux/inet_diag.h b/include/linux/inet_diag.h
index 0e707f0..bcf1189 100644
--- a/include/linux/inet_diag.h
+++ b/include/linux/inet_diag.h
@@ -25,6 +25,7 @@ struct inet_diag_handler {
void *info);
__u16 idiag_type;
__u16 idiag_info_size;
+ __u8 idiag_info_type;
};
struct inet_connection_sock;
diff --git a/include/uapi/linux/inet_diag.h b/include/uapi/linux/inet_diag.h
index 68a1f71..5ad029a 100644
--- a/include/uapi/linux/inet_diag.h
+++ b/include/uapi/linux/inet_diag.h
@@ -113,9 +113,10 @@ enum {
INET_DIAG_DCTCPINFO,
INET_DIAG_PROTOCOL, /* response attribute only */
INET_DIAG_SKV6ONLY,
+ INET_DIAG_UDP_INFO,
};
-#define INET_DIAG_MAX INET_DIAG_SKV6ONLY
+#define INET_DIAG_MAX INET_DIAG_UDP_INFO
/* INET_DIAG_MEM */
diff --git a/include/uapi/linux/udp.h b/include/uapi/linux/udp.h
index 16574ea..6ba37dc 100644
--- a/include/uapi/linux/udp.h
+++ b/include/uapi/linux/udp.h
@@ -37,5 +37,8 @@ struct udphdr {
#define UDP_ENCAP_ESPINUDP 2 /* draft-ietf-ipsec-udp-encaps-06 */
#define UDP_ENCAP_L2TPINUDP 3 /* rfc2661 */
+struct udp_info {
+};
+
#endif /* _UAPI_LINUX_UDP_H */
diff --git a/net/dccp/diag.c b/net/dccp/diag.c
index 2d84303..3c1bf5c 100644
--- a/net/dccp/diag.c
+++ b/net/dccp/diag.c
@@ -67,6 +67,7 @@ static const struct inet_diag_handler dccp_diag_handler = {
.idiag_get_info = dccp_diag_get_info,
.idiag_type = IPPROTO_DCCP,
.idiag_info_size = sizeof(struct tcp_info),
+ .idiag_info_type = INET_DIAG_INFO,
};
static int __init dccp_diag_init(void)
diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index ab9f8a6..581b335 100644
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -177,8 +177,17 @@ int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
if (sock_diag_put_meminfo(sk, skb, INET_DIAG_SKMEMINFO))
goto errout;
+ if ((ext & (1 << (INET_DIAG_INFO - 1))) && handler->idiag_info_size) {
+ attr = nla_reserve(skb, handler->idiag_info_type,
+ handler->idiag_info_size);
+ if (!attr)
+ goto errout;
+
+ info = nla_data(attr);
+ }
+ handler->idiag_get_info(sk, r, info);
+
if (!icsk) {
- handler->idiag_get_info(sk, r, NULL);
goto out;
}
@@ -204,15 +213,6 @@ int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
}
#undef EXPIRES_IN_MS
- if ((ext & (1 << (INET_DIAG_INFO - 1))) && handler->idiag_info_size) {
- attr = nla_reserve(skb, INET_DIAG_INFO,
- handler->idiag_info_size);
- if (!attr)
- goto errout;
-
- info = nla_data(attr);
- }
-
if (ext & (1 << (INET_DIAG_CONG - 1))) {
int err = 0;
@@ -225,8 +225,6 @@ int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
goto errout;
}
- handler->idiag_get_info(sk, r, info);
-
if (sk->sk_state < TCP_TIME_WAIT) {
union tcp_cc_info info;
size_t sz = 0;
@@ -1036,7 +1034,8 @@ int inet_diag_handler_get_info(struct sk_buff *skb, struct sock *sk)
}
attr = handler->idiag_info_size
- ? nla_reserve(skb, INET_DIAG_INFO, handler->idiag_info_size)
+ ? nla_reserve(skb, handler->idiag_info_type,
+ handler->idiag_info_size)
: NULL;
if (attr)
info = nla_data(attr);
diff --git a/net/ipv4/tcp_diag.c b/net/ipv4/tcp_diag.c
index 479f349..66e044b 100644
--- a/net/ipv4/tcp_diag.c
+++ b/net/ipv4/tcp_diag.c
@@ -52,6 +52,7 @@ static const struct inet_diag_handler tcp_diag_handler = {
.idiag_get_info = tcp_diag_get_info,
.idiag_type = IPPROTO_TCP,
.idiag_info_size = sizeof(struct tcp_info),
+ .idiag_info_type = INET_DIAG_INFO,
};
static int __init tcp_diag_init(void)
diff --git a/net/ipv4/udp_diag.c b/net/ipv4/udp_diag.c
index 6116604..db48698 100644
--- a/net/ipv4/udp_diag.c
+++ b/net/ipv4/udp_diag.c
@@ -170,7 +170,8 @@ 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,
+ .idiag_info_size = sizeof(struct udp_info),
+ .idiag_info_type = INET_DIAG_UDP_INFO,
};
static void udplite_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
@@ -191,7 +192,8 @@ 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,
+ .idiag_info_size = sizeof(struct udp_info),
+ .idiag_info_type = INET_DIAG_UDP_INFO,
};
static int __init udp_diag_init(void)
--
2.6.0.rc2.230.g3dd15c0
--
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