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| author | Pavel Emelyanov <xemul@parallels.com> | 2012-08-13 05:57:44 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-08-14 16:56:33 -0700 |
| commit | eea68e2f1a0061e09265992b91fdc0014930ae92 (patch) | |
| tree | 2b8f78565a04701e49b271b670a67fcb362c8022 /net/packet | |
| parent | 8a360be0c5f8fe2c46f0a524886fa56596534193 (diff) | |
| download | linux-stable-eea68e2f1a0061e09265992b91fdc0014930ae92.tar.gz linux-stable-eea68e2f1a0061e09265992b91fdc0014930ae92.tar.bz2 linux-stable-eea68e2f1a0061e09265992b91fdc0014930ae92.zip | |
packet: Report socket mclist info via diag module
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>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/packet')
| -rw-r--r-- | net/packet/diag.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/net/packet/diag.c b/net/packet/diag.c index d5bd0372d004..3dda4ecb9a46 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: |