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packet: Report fanout status via diag engine

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Reported value is the same reported by the FANOUT getsockoption, but
unlike it, the absent fanout setup results in absent nlattr, rather
than in nlattr with zero value. This is done so, since zero fanout
report may mean both -- no fanout, and fanout with both id and type zero.

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov
2012-08-16 05:36:48 +00:00
committed by David S. Miller
parent 16f01365fa
commit fff3321d75
4 changed files with 44 additions and 21 deletions
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20
net/packet/internal.h
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@ -67,7 +67,25 @@ struct packet_ring_buffer {
atomic_t pending;
};
struct packet_fanout;
extern struct mutex fanout_mutex;
#define PACKET_FANOUT_MAX 256
struct packet_fanout {
#ifdef CONFIG_NET_NS
struct net *net;
#endif
unsigned int num_members;
u16 id;
u8 type;
u8 defrag;
atomic_t rr_cur;
struct list_head list;
struct sock *arr[PACKET_FANOUT_MAX];
spinlock_t lock;
atomic_t sk_ref;
struct packet_type prot_hook ____cacheline_aligned_in_smp;
};
struct packet_sock {
/* struct sock has to be the first member of packet_sock */
struct sock sk;