1 #include <linux/module.h>
4 #include <linux/netlink.h>
5 #include <linux/sock_diag.h>
6 #include <linux/netlink_diag.h>
7 #include <linux/rhashtable.h>
9 #include "af_netlink.h"
11 static int sk_diag_dump_groups(struct sock *sk, struct sk_buff *nlskb)
13 struct netlink_sock *nlk = nlk_sk(sk);
15 if (nlk->groups == NULL)
18 return nla_put(nlskb, NETLINK_DIAG_GROUPS, NLGRPSZ(nlk->ngroups),
22 static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
23 struct netlink_diag_req *req,
24 u32 portid, u32 seq, u32 flags, int sk_ino)
27 struct netlink_diag_msg *rep;
28 struct netlink_sock *nlk = nlk_sk(sk);
30 nlh = nlmsg_put(skb, portid, seq, SOCK_DIAG_BY_FAMILY, sizeof(*rep),
35 rep = nlmsg_data(nlh);
36 rep->ndiag_family = AF_NETLINK;
37 rep->ndiag_type = sk->sk_type;
38 rep->ndiag_protocol = sk->sk_protocol;
39 rep->ndiag_state = sk->sk_state;
41 rep->ndiag_ino = sk_ino;
42 rep->ndiag_portid = nlk->portid;
43 rep->ndiag_dst_portid = nlk->dst_portid;
44 rep->ndiag_dst_group = nlk->dst_group;
45 sock_diag_save_cookie(sk, rep->ndiag_cookie);
47 if ((req->ndiag_show & NDIAG_SHOW_GROUPS) &&
48 sk_diag_dump_groups(sk, skb))
51 if ((req->ndiag_show & NDIAG_SHOW_MEMINFO) &&
52 sock_diag_put_meminfo(sk, skb, NETLINK_DIAG_MEMINFO))
59 nlmsg_cancel(skb, nlh);
63 static int __netlink_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
64 int protocol, int s_num)
66 struct netlink_table *tbl = &nl_table[protocol];
67 struct rhashtable *ht = &tbl->hash;
68 const struct bucket_table *htbl = rht_dereference_rcu(ht->tbl, ht);
69 struct net *net = sock_net(skb->sk);
70 struct netlink_diag_req *req;
71 struct netlink_sock *nlsk;
73 int ret = 0, num = 0, i;
75 req = nlmsg_data(cb->nlh);
77 for (i = 0; i < htbl->size; i++) {
78 struct rhash_head *pos;
80 rht_for_each_entry_rcu(nlsk, pos, htbl, i, node) {
81 sk = (struct sock *)nlsk;
83 if (!net_eq(sock_net(sk), net))
90 if (sk_diag_fill(sk, skb, req,
91 NETLINK_CB(cb->skb).portid,
94 sock_i_ino(sk)) < 0) {
103 sk_for_each_bound(sk, &tbl->mc_list) {
106 if (!net_eq(sock_net(sk), net))
113 if (sk_diag_fill(sk, skb, req,
114 NETLINK_CB(cb->skb).portid,
117 sock_i_ino(sk)) < 0) {
125 cb->args[1] = protocol;
130 static int netlink_diag_dump(struct sk_buff *skb, struct netlink_callback *cb)
132 struct netlink_diag_req *req;
133 int s_num = cb->args[0];
135 req = nlmsg_data(cb->nlh);
138 read_lock(&nl_table_lock);
140 if (req->sdiag_protocol == NDIAG_PROTO_ALL) {
143 for (i = cb->args[1]; i < MAX_LINKS; i++) {
144 if (__netlink_diag_dump(skb, cb, i, s_num))
149 if (req->sdiag_protocol >= MAX_LINKS) {
150 read_unlock(&nl_table_lock);
155 __netlink_diag_dump(skb, cb, req->sdiag_protocol, s_num);
158 read_unlock(&nl_table_lock);
164 static int netlink_diag_handler_dump(struct sk_buff *skb, struct nlmsghdr *h)
166 int hdrlen = sizeof(struct netlink_diag_req);
167 struct net *net = sock_net(skb->sk);
169 if (nlmsg_len(h) < hdrlen)
172 if (h->nlmsg_flags & NLM_F_DUMP) {
173 struct netlink_dump_control c = {
174 .dump = netlink_diag_dump,
176 return netlink_dump_start(net->diag_nlsk, skb, h, &c);
181 static const struct sock_diag_handler netlink_diag_handler = {
182 .family = AF_NETLINK,
183 .dump = netlink_diag_handler_dump,
186 static int __init netlink_diag_init(void)
188 return sock_diag_register(&netlink_diag_handler);
191 static void __exit netlink_diag_exit(void)
193 sock_diag_unregister(&netlink_diag_handler);
196 module_init(netlink_diag_init);
197 module_exit(netlink_diag_exit);
198 MODULE_LICENSE("GPL");
199 MODULE_ALIAS_NET_PF_PROTO_TYPE(PF_NETLINK, NETLINK_SOCK_DIAG, 16 /* AF_NETLINK */);