From 5d2e5f274f9e9a06fb934dd45260e2616a9992e6 Mon Sep 17 00:00:00 2001
From: Pavel Emelyanov <xemul@parallels.com>
Date: Fri, 30 Dec 2011 00:53:13 +0000
Subject: [PATCH] sock_diag: Introduce the meminfo nla core (v2)
Add a routine that dumps memory-related values of a socket.
It's made as an array to make it possible to add more stuff
here later without breaking compatibility.
Since v1: The SK_MEMINFO_ constants are in userspace
visible part of sock_diag.h, the rest is under __KERNEL__.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
include/linux/sock_diag.h | 15 +++++++++++++++
net/core/sock_diag.c | 23 +++++++++++++++++++++++
2 files changed, 38 insertions(+)
diff --git a/include/linux/sock_diag.h b/include/linux/sock_diag.h
index 66bc18ef4fa4..251729a47880 100644
--- a/include/linux/sock_diag.h
+++ b/include/linux/sock_diag.h
@@ -10,9 +10,22 @@ struct sock_diag_req {
__u8 sdiag_protocol;
};
+enum {
+ SK_MEMINFO_RMEM_ALLOC,
+ SK_MEMINFO_RCVBUF,
+ SK_MEMINFO_WMEM_ALLOC,
+ SK_MEMINFO_SNDBUF,
+ SK_MEMINFO_FWD_ALLOC,
+ SK_MEMINFO_WMEM_QUEUED,
+ SK_MEMINFO_OPTMEM,
+
+ SK_MEMINFO_VARS,
+};
+
#ifdef __KERNEL__
struct sk_buff;
struct nlmsghdr;
+struct sock;
struct sock_diag_handler {
__u8 family;
@@ -28,6 +41,8 @@ void sock_diag_unregister_inet_compat(int (*fn)(struct sk_buff *skb, struct nlms
int sock_diag_check_cookie(void *sk, __u32 *cookie);
void sock_diag_save_cookie(void *sk, __u32 *cookie);
+int sock_diag_put_meminfo(struct sock *sk, struct sk_buff *skb, int attr);
+
extern struct sock *sock_diag_nlsk;
#endif /* KERNEL */
#endif
diff --git a/net/core/sock_diag.c b/net/core/sock_diag.c
index 711bdefe7753..b9868e1fd62c 100644
--- a/net/core/sock_diag.c
+++ b/net/core/sock_diag.c
@@ -4,6 +4,8 @@
#include <net/netlink.h>
#include <net/net_namespace.h>
#include <linux/module.h>
+#include <linux/rtnetlink.h>
+#include <net/sock.h>
#include <linux/inet_diag.h>
#include <linux/sock_diag.h>
@@ -31,6 +33,27 @@ void sock_diag_save_cookie(void *sk, __u32 *cookie)
}
EXPORT_SYMBOL_GPL(sock_diag_save_cookie);
+int sock_diag_put_meminfo(struct sock *sk, struct sk_buff *skb, int attrtype)
+{
+ __u32 *mem;
+
+ mem = RTA_DATA(__RTA_PUT(skb, attrtype, SK_MEMINFO_VARS * sizeof(__u32)));
+
+ mem[SK_MEMINFO_RMEM_ALLOC] = sk_rmem_alloc_get(sk);
+ mem[SK_MEMINFO_RCVBUF] = sk->sk_rcvbuf;
+ mem[SK_MEMINFO_WMEM_ALLOC] = sk_wmem_alloc_get(sk);
+ mem[SK_MEMINFO_SNDBUF] = sk->sk_sndbuf;
+ mem[SK_MEMINFO_FWD_ALLOC] = sk->sk_forward_alloc;
+ mem[SK_MEMINFO_WMEM_QUEUED] = sk->sk_wmem_queued;
+ mem[SK_MEMINFO_OPTMEM] = atomic_read(&sk->sk_omem_alloc);
+
+ return 0;
+
+rtattr_failure:
+ return -EMSGSIZE;
+}
+EXPORT_SYMBOL_GPL(sock_diag_put_meminfo);
+
void sock_diag_register_inet_compat(int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh))
{
mutex_lock(&sock_diag_table_mutex);
--
2.34.1