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unix_diag: Dumping all sockets core

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Walk the unix sockets table and fill the core response structure,
which includes type, state and inode.

Signed-off-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Pavel Emelyanov 2011-12-15 02:44:52 +00:00 • committed by David S. Miller
parent 22931d3b90
commit 45a96b9be6
1 changed files with 75 additions and 1 deletions
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76
net/unix/diag.c
View file

@ -10,9 +10,83 @@
#define UNIX_DIAG_PUT(skb, attrtype, attrlen) \ #define UNIX_DIAG_PUT(skb, attrtype, attrlen) \
RTA_DATA(__RTA_PUT(skb, attrtype, attrlen)) RTA_DATA(__RTA_PUT(skb, attrtype, attrlen))
static int sk_diag_fill(struct sock *sk, struct sk_buff *skb, struct unix_diag_req *req,
u32 pid, u32 seq, u32 flags, int sk_ino)
{
unsigned char *b = skb_tail_pointer(skb);
struct nlmsghdr *nlh;
struct unix_diag_msg *rep;
nlh = NLMSG_PUT(skb, pid, seq, SOCK_DIAG_BY_FAMILY, sizeof(*rep));
nlh->nlmsg_flags = flags;
rep = NLMSG_DATA(nlh);
rep->udiag_family = AF_UNIX;
rep->udiag_type = sk->sk_type;
rep->udiag_state = sk->sk_state;
rep->udiag_ino = sk_ino;
sock_diag_save_cookie(sk, rep->udiag_cookie);
nlh->nlmsg_len = skb_tail_pointer(skb) - b;
return skb->len;
nlmsg_failure:
nlmsg_trim(skb, b);
return -EMSGSIZE;
}
static int sk_diag_dump(struct sock *sk, struct sk_buff *skb, struct unix_diag_req *req,
u32 pid, u32 seq, u32 flags)
{
int sk_ino;
unix_state_lock(sk);
sk_ino = sock_i_ino(sk);
unix_state_unlock(sk);
if (!sk_ino)
return 0;
return sk_diag_fill(sk, skb, req, pid, seq, flags, sk_ino);
}
static int unix_diag_dump(struct sk_buff *skb, struct netlink_callback *cb) static int unix_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
{ {
return 0; struct unix_diag_req *req;
int num, s_num, slot, s_slot;
req = NLMSG_DATA(cb->nlh);
s_slot = cb->args[0];
num = s_num = cb->args[1];
spin_lock(&unix_table_lock);
for (slot = s_slot; slot <= UNIX_HASH_SIZE; s_num = 0, slot++) {
struct sock *sk;
struct hlist_node *node;
num = 0;
sk_for_each(sk, node, &unix_socket_table[slot]) {
if (num < s_num)
goto next;
if (!(req->udiag_states & (1 << sk->sk_state)))
goto next;
if (sk_diag_dump(sk, skb, req,
NETLINK_CB(cb->skb).pid,
cb->nlh->nlmsg_seq,
NLM_F_MULTI) < 0)
goto done;
next:
num++;
}
}
done:
spin_unlock(&unix_table_lock);
cb->args[0] = slot;
cb->args[1] = num;
return skb->len;
} }
static int unix_diag_get_exact(struct sk_buff *in_skb, static int unix_diag_get_exact(struct sk_buff *in_skb,