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authorPavel Emelyanov <xemul@parallels.com>2011-12-09 06:24:21 +0000
committerDavid S. Miller <davem@davemloft.net>2011-12-09 14:15:00 -0500
commitb6d640c2286d16b15a21a4475c896cdce6a0bbe0 (patch)
tree01f55007bfb8c680a4689d6e6f312f22f28adec3 /net/ipv4
parentudp_diag: Implement the get_exact dumping functionality (diff)
downloadlinux-dev-b6d640c2286d16b15a21a4475c896cdce6a0bbe0.tar.xz
linux-dev-b6d640c2286d16b15a21a4475c896cdce6a0bbe0.zip
udp_diag: Implement the dump-all functionality
Do the same as TCP does -- iterate the given udp_table, filter sockets with bytecode and dump sockets into reply message. The same filtering as for TCP applies, though only some of the state bits really matter. Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
-rw-r--r--net/ipv4/udp_diag.c54
1 files changed, 54 insertions, 0 deletions
diff --git a/net/ipv4/udp_diag.c b/net/ipv4/udp_diag.c
index caa164dcd30f..65063444a119 100644
--- a/net/ipv4/udp_diag.c
+++ b/net/ipv4/udp_diag.c
@@ -18,6 +18,17 @@
#include <linux/inet_diag.h>
#include <linux/sock_diag.h>
+static int sk_diag_dump(struct sock *sk, struct sk_buff *skb,
+ struct netlink_callback *cb, struct inet_diag_req *req,
+ struct nlattr *bc)
+{
+ if (!inet_diag_bc_sk(bc, sk))
+ return 0;
+
+ return inet_sk_diag_fill(sk, NULL, skb, req, NETLINK_CB(cb->skb).pid,
+ cb->nlh->nlmsg_seq, NLM_F_MULTI, cb->nlh);
+}
+
static int udp_dump_one(struct udp_table *tbl, struct sk_buff *in_skb,
const struct nlmsghdr *nlh, struct inet_diag_req *req)
{
@@ -77,6 +88,49 @@ out_nosk:
static void udp_dump(struct udp_table *table, struct sk_buff *skb, struct netlink_callback *cb,
struct inet_diag_req *r, struct nlattr *bc)
{
+ int num, s_num, slot, s_slot;
+
+ s_slot = cb->args[0];
+ num = s_num = cb->args[1];
+
+ for (slot = s_slot; slot <= table->mask; num = s_num = 0, slot++) {
+ struct sock *sk;
+ struct hlist_nulls_node *node;
+ struct udp_hslot *hslot = &table->hash[slot];
+
+ if (hlist_nulls_empty(&hslot->head))
+ continue;
+
+ spin_lock_bh(&hslot->lock);
+ sk_nulls_for_each(sk, node, &hslot->head) {
+ struct inet_sock *inet = inet_sk(sk);
+
+ if (num < s_num)
+ goto next;
+ if (!(r->idiag_states & (1 << sk->sk_state)))
+ goto next;
+ if (r->sdiag_family != AF_UNSPEC &&
+ sk->sk_family != r->sdiag_family)
+ goto next;
+ if (r->id.idiag_sport != inet->inet_sport &&
+ r->id.idiag_sport)
+ goto next;
+ if (r->id.idiag_dport != inet->inet_dport &&
+ r->id.idiag_dport)
+ goto next;
+
+ if (sk_diag_dump(sk, skb, cb, r, bc) < 0) {
+ spin_unlock_bh(&hslot->lock);
+ goto done;
+ }
+next:
+ num++;
+ }
+ spin_unlock_bh(&hslot->lock);
+ }
+done:
+ cb->args[0] = slot;
+ cb->args[1] = num;
}
static void udp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,