---

yaml --- r: 369325 b: refs/heads/master c: 4ae9fbe h: refs/heads/master i: 369323: ba98688 v: v3
git-mirror · Apr 19, 2013 · 5e1e533 · 5e1e533
1 parent a3449fb
commit 5e1e533
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Showing 3 changed files with 43 additions and 1 deletion.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: cd1df525da59c64244d27b4548ff5d132489488a
+refs/heads/master: 4ae9fbee1690848a6aace1e0193ab27e981e35a5
diff --git a/trunk/include/uapi/linux/netlink_diag.h b/trunk/include/uapi/linux/netlink_diag.h
@@ -25,9 +25,18 @@ struct netlink_diag_msg {
 	__u32	ndiag_cookie[2];
 };
 
+struct netlink_diag_ring {
+	__u32	ndr_block_size;
+	__u32	ndr_block_nr;
+	__u32	ndr_frame_size;
+	__u32	ndr_frame_nr;
+};
+
 enum {
 	NETLINK_DIAG_MEMINFO,
 	NETLINK_DIAG_GROUPS,
+	NETLINK_DIAG_RX_RING,
+	NETLINK_DIAG_TX_RING,
 
 	__NETLINK_DIAG_MAX,
 };
@@ -38,5 +47,6 @@ enum {
 
 #define NDIAG_SHOW_MEMINFO	0x00000001 /* show memory info of a socket */
 #define NDIAG_SHOW_GROUPS	0x00000002 /* show groups of a netlink socket */
+#define NDIAG_SHOW_RING_CFG	0x00000004 /* show ring configuration */
 
 #endif
diff --git a/trunk/net/netlink/diag.c b/trunk/net/netlink/diag.c
@@ -7,6 +7,34 @@
 
 #include "af_netlink.h"
 
+static int sk_diag_put_ring(struct netlink_ring *ring, int nl_type,
+			    struct sk_buff *nlskb)
+{
+	struct netlink_diag_ring ndr;
+
+	ndr.ndr_block_size = ring->pg_vec_pages << PAGE_SHIFT;
+	ndr.ndr_block_nr   = ring->pg_vec_len;
+	ndr.ndr_frame_size = ring->frame_size;
+	ndr.ndr_frame_nr   = ring->frame_max + 1;
+
+	return nla_put(nlskb, nl_type, sizeof(ndr), &ndr);
+}
+
+static int sk_diag_put_rings_cfg(struct sock *sk, struct sk_buff *nlskb)
+{
+	struct netlink_sock *nlk = nlk_sk(sk);
+	int ret;
+
+	mutex_lock(&nlk->pg_vec_lock);
+	ret = sk_diag_put_ring(&nlk->rx_ring, NETLINK_DIAG_RX_RING, nlskb);
+	if (!ret)
+		ret = sk_diag_put_ring(&nlk->tx_ring, NETLINK_DIAG_TX_RING,
+				       nlskb);
+	mutex_unlock(&nlk->pg_vec_lock);
+
+	return ret;
+}
+
 static int sk_diag_dump_groups(struct sock *sk, struct sk_buff *nlskb)
 {
 	struct netlink_sock *nlk = nlk_sk(sk);
@@ -51,6 +79,10 @@ static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
 	    sock_diag_put_meminfo(sk, skb, NETLINK_DIAG_MEMINFO))
 		goto out_nlmsg_trim;
 
+	if ((req->ndiag_show & NDIAG_SHOW_RING_CFG) &&
+	    sk_diag_put_rings_cfg(sk, skb))
+		goto out_nlmsg_trim;
+
 	return nlmsg_end(skb, nlh);
 
 out_nlmsg_trim: