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authorPatrick McHardy <kaber@trash.net>2013-04-17 06:47:06 +0000
committerDavid S. Miller <davem@davemloft.net>2013-04-19 14:57:58 -0400
commit4ae9fbee1690848a6aace1e0193ab27e981e35a5 (patch)
tree10390445b761524709f15fb21db79ad83d1b3d91 /net/netlink
parentcd1df525da59c64244d27b4548ff5d132489488a (diff)
downloadlinux-4ae9fbee1690848a6aace1e0193ab27e981e35a5.tar.gz
netlink: add RX/TX-ring support to netlink diag
Based on AF_PACKET. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netlink')
-rw-r--r--net/netlink/diag.c32
1 files changed, 32 insertions, 0 deletions
diff --git a/net/netlink/diag.c b/net/netlink/diag.c
index 5ffb1d1cf40..4e4aa471cd0 100644
--- a/net/netlink/diag.c
+++ b/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: