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>

1 files changed, 15 insertions, 0 deletions

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