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authorPavel Emelyanov <xemul@parallels.com>2011-12-30 00:53:13 +0000
committerDavid S. Miller <davem@davemloft.net>2011-12-30 16:42:19 -0500
commit5d2e5f274f9e9a06fb934dd45260e2616a9992e6 (patch)
tree61ae9157e41b00a19f58518d58d0c739393cbccb /net/core
parent288461e1546fa4162fa237eeed8ea09a16521dcd (diff)
downloadlwn-5d2e5f274f9e9a06fb934dd45260e2616a9992e6.tar.gz
lwn-5d2e5f274f9e9a06fb934dd45260e2616a9992e6.zip
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>
Diffstat (limited to 'net/core')
-rw-r--r--net/core/sock_diag.c23
1 files changed, 23 insertions, 0 deletions
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);