From: Pavel Emelyanov <xemul@parallels•com>
To: Linux Netdev List <netdev@vger•kernel.org>,
David Miller <davem@davemloft•net>
Subject: [PATCH 4/4] packet: Report socket mclist info via diag module
Date: Mon, 13 Aug 2012 19:57:44 +0400 [thread overview]
Message-ID: <502923F8.9080301@parallels.com> (raw)
In-Reply-To: <5029219C.20305@parallels.com>
The info is reported as an array of packet_diag_mclist structures. Each
includes not only the directly configured values (index, type, etc), but
also the "count".
Signed-off-by: Pavel Emelyanov <xemul@parallels•com>
---
include/linux/packet_diag.h | 10 ++++++++++
net/packet/diag.c | 39 +++++++++++++++++++++++++++++++++++++++
2 files changed, 49 insertions(+), 0 deletions(-)
diff --git a/include/linux/packet_diag.h b/include/linux/packet_diag.h
index 3781ea4..ea2e8923 100644
--- a/include/linux/packet_diag.h
+++ b/include/linux/packet_diag.h
@@ -13,6 +13,7 @@ struct packet_diag_req {
};
#define PACKET_SHOW_INFO 0x00000001 /* Basic packet_sk information */
+#define PACKET_SHOW_MCLIST 0x00000002 /* A set of packet_diag_mclist-s */
struct packet_diag_msg {
__u8 pdiag_family;
@@ -25,6 +26,7 @@ struct packet_diag_msg {
enum {
PACKET_DIAG_INFO,
+ PACKET_DIAG_MCLIST,
PACKET_DIAG_MAX,
};
@@ -44,4 +46,12 @@ struct packet_diag_info {
#define PDI_LOSS 0x10
};
+struct packet_diag_mclist {
+ __u32 pdmc_index;
+ __u32 pdmc_count;
+ __u16 pdmc_type;
+ __u16 pdmc_alen;
+ __u8 pdmc_addr[MAX_ADDR_LEN];
+};
+
#endif
diff --git a/net/packet/diag.c b/net/packet/diag.c
index d5bd037..3dda4ec 100644
--- a/net/packet/diag.c
+++ b/net/packet/diag.c
@@ -1,6 +1,7 @@
#include <linux/module.h>
#include <linux/sock_diag.h>
#include <linux/net.h>
+#include <linux/netdevice.h>
#include <linux/packet_diag.h>
#include <net/net_namespace.h>
#include <net/sock.h>
@@ -32,6 +33,40 @@ static int pdiag_put_info(const struct packet_sock *po, struct sk_buff *nlskb)
return nla_put(nlskb, PACKET_DIAG_INFO, sizeof(pinfo), &pinfo);
}
+static int pdiag_put_mclist(const struct packet_sock *po, struct sk_buff *nlskb)
+{
+ struct nlattr *mca;
+ struct packet_mclist *ml;
+
+ mca = nla_nest_start(nlskb, PACKET_DIAG_MCLIST);
+ if (!mca)
+ return -EMSGSIZE;
+
+ rtnl_lock();
+ for (ml = po->mclist; ml; ml = ml->next) {
+ struct packet_diag_mclist *dml;
+
+ dml = nla_reserve_nohdr(nlskb, sizeof(*dml));
+ if (!dml) {
+ rtnl_unlock();
+ nla_nest_cancel(nlskb, mca);
+ return -EMSGSIZE;
+ }
+
+ dml->pdmc_index = ml->ifindex;
+ dml->pdmc_type = ml->type;
+ dml->pdmc_alen = ml->alen;
+ dml->pdmc_count = ml->count;
+ BUILD_BUG_ON(sizeof(dml->pdmc_addr) != sizeof(ml->addr));
+ memcpy(dml->pdmc_addr, ml->addr, sizeof(ml->addr));
+ }
+
+ rtnl_unlock();
+ nla_nest_end(nlskb, mca);
+
+ return 0;
+}
+
static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, struct packet_diag_req *req,
u32 pid, u32 seq, u32 flags, int sk_ino)
{
@@ -54,6 +89,10 @@ static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, struct packet_diag
pdiag_put_info(po, skb))
goto out_nlmsg_trim;
+ if ((req->pdiag_show & PACKET_SHOW_MCLIST) &&
+ pdiag_put_mclist(po, skb))
+ goto out_nlmsg_trim;
+
return nlmsg_end(skb, nlh);
out_nlmsg_trim:
--
1.7.6.5
next prev parent reply other threads:[~2012-08-13 15:57 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-08-13 15:47 [PATCH net-next 0/4] packet: Sock-diag extension for packet sockets (beginning) Pavel Emelyanov
2012-08-13 15:49 ` [PATCH 1/4] packet: Introduce net/packet/internal.h header Pavel Emelyanov
2012-08-13 15:53 ` [PATCH 2/4] packet: Diag core and basic socket info dumping Pavel Emelyanov
2012-08-13 15:55 ` [PATCH 2/4] packet: Report more packet sk info via diag module Pavel Emelyanov
2012-08-13 15:57 ` Pavel Emelyanov [this message]
2012-08-14 23:56 ` [PATCH net-next 0/4] packet: Sock-diag extension for packet sockets (beginning) David Miller
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