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net: diag: split inet_diag_dump_one_icsk into two 

Currently, inet_diag_dump_one_icsk finds a socket and then dumps
its information to userspace. Split it into a part that finds the
socket and a part that dumps the information.

Signed-off-by: Lorenzo Colitti <lorenzo@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lorenzo Colitti 2015-12-16 12:30:02 +09:00 committed by David S. Miller
parent fec65bd4e8
commit b613f56ec9
2 changed files with 32 additions and 15 deletions
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5
include/linux/inet_diag.h
View File

@ -3,6 +3,7 @@
#include <uapi/linux/inet_diag.h>
struct net;
struct sock;
struct inet_hashinfo;
struct nlattr;
@ -41,6 +42,10 @@ int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo,
struct sk_buff *in_skb, const struct nlmsghdr *nlh,
const struct inet_diag_req_v2 *req);
struct sock *inet_diag_find_one_icsk(struct net *net,
struct inet_hashinfo *hashinfo,
const struct inet_diag_req_v2 *req);
int inet_diag_bc_sk(const struct nlattr *_bc, struct sock *sk);
extern int inet_diag_register(const struct inet_diag_handler *handler);

42
net/ipv4/inet_diag.c
View File

@ -350,17 +350,12 @@ static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
nlmsg_flags, unlh);
}
int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo,
struct sk_buff *in_skb,
const struct nlmsghdr *nlh,
const struct inet_diag_req_v2 *req)
struct sock *inet_diag_find_one_icsk(struct net *net,
struct inet_hashinfo *hashinfo,
const struct inet_diag_req_v2 *req)
{
struct net *net = sock_net(in_skb->sk);
struct sk_buff *rep;
struct sock *sk;
int err;
err = -EINVAL;
if (req->sdiag_family == AF_INET)
sk = inet_lookup(net, hashinfo, req->id.idiag_dst[0],
req->id.idiag_dport, req->id.idiag_src[0],
@ -375,15 +370,33 @@ int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo,
req->id.idiag_if);
#endif
else
goto out_nosk;
return ERR_PTR(-EINVAL);
err = -ENOENT;
if (!sk)
goto out_nosk;
return ERR_PTR(-ENOENT);
err = sock_diag_check_cookie(sk, req->id.idiag_cookie);
if (err)
goto out;
if (sock_diag_check_cookie(sk, req->id.idiag_cookie)) {
sock_gen_put(sk);
return ERR_PTR(-ENOENT);
}
return sk;
}
EXPORT_SYMBOL_GPL(inet_diag_find_one_icsk);
int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo,
struct sk_buff *in_skb,
const struct nlmsghdr *nlh,
const struct inet_diag_req_v2 *req)
{
struct net *net = sock_net(in_skb->sk);
struct sk_buff *rep;
struct sock *sk;
int err;
sk = inet_diag_find_one_icsk(net, hashinfo, req);
if (IS_ERR(sk))
return PTR_ERR(sk);
rep = nlmsg_new(inet_sk_attr_size(), GFP_KERNEL);
if (!rep) {
@ -409,7 +422,6 @@ out:
if (sk)
sock_gen_put(sk);
out_nosk:
return err;
}
EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk);