inet_diag: Generalize inet_diag dump and get_exact calls
Introduce two callbacks in inet_diag_handler -- one for dumping all sockets (with filters) and the other one for dumping a single sk. Replace direct calls to icsk handlers with indirect calls to callbacks provided by handlers. Make existing TCP and DCCP handlers use provided helpers for icsk-s. The UDP diag module will provide its own. Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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3c4d05c805
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@ -138,9 +138,18 @@ struct inet_hashinfo;
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struct nlattr;
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struct nlmsghdr;
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struct sk_buff;
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struct netlink_callback;
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struct inet_diag_handler {
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struct inet_hashinfo *idiag_hashinfo;
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void (*dump)(struct sk_buff *skb,
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struct netlink_callback *cb,
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struct inet_diag_req *r,
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struct nlattr *bc);
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int (*dump_one)(struct sk_buff *in_skb,
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const struct nlmsghdr *nlh,
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struct inet_diag_req *req);
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void (*idiag_get_info)(struct sock *sk,
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struct inet_diag_msg *r,
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void *info);
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@ -152,6 +161,13 @@ int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
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struct sk_buff *skb, struct inet_diag_req *req,
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u32 pid, u32 seq, u16 nlmsg_flags,
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const struct nlmsghdr *unlh);
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void inet_diag_dump_icsk(struct inet_hashinfo *h, struct sk_buff *skb,
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struct netlink_callback *cb, struct inet_diag_req *r,
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struct nlattr *bc);
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int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo,
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struct sk_buff *in_skb, const struct nlmsghdr *nlh,
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struct inet_diag_req *req);
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int inet_diag_bc_sk(const struct nlattr *_bc, struct sock *sk);
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int inet_diag_check_cookie(struct sock *sk, struct inet_diag_req *req);
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@ -48,8 +48,21 @@ static void dccp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
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dccp_get_info(sk, _info);
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}
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static void dccp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
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struct inet_diag_req *r, struct nlattr *bc)
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{
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inet_diag_dump_icsk(&dccp_hashinfo, skb, cb, r, bc);
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}
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static int dccp_diag_dump_one(struct sk_buff *in_skb, const struct nlmsghdr *nlh,
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struct inet_diag_req *req)
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{
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return inet_diag_dump_one_icsk(&dccp_hashinfo, in_skb, nlh, req);
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}
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static const struct inet_diag_handler dccp_diag_handler = {
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.idiag_hashinfo = &dccp_hashinfo,
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.dump = dccp_diag_dump,
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.dump_one = dccp_diag_dump_one,
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.idiag_get_info = dccp_diag_get_info,
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.idiag_type = IPPROTO_DCCP,
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};
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@ -273,7 +273,7 @@ int inet_diag_check_cookie(struct sock *sk, struct inet_diag_req *req)
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}
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EXPORT_SYMBOL_GPL(inet_diag_check_cookie);
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static int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *in_skb,
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int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *in_skb,
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const struct nlmsghdr *nlh, struct inet_diag_req *req)
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{
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int err;
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@ -339,6 +339,7 @@ out:
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out_nosk:
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return err;
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}
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EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk);
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static int inet_diag_get_exact(struct sk_buff *in_skb,
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const struct nlmsghdr *nlh,
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@ -351,8 +352,7 @@ static int inet_diag_get_exact(struct sk_buff *in_skb,
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if (IS_ERR(handler))
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err = PTR_ERR(handler);
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else
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err = inet_diag_dump_one_icsk(handler->idiag_hashinfo,
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in_skb, nlh, req);
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err = handler->dump_one(in_skb, nlh, req);
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inet_diag_unlock_handler(handler);
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return err;
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@ -731,7 +731,7 @@ out:
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return err;
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}
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static void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb,
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void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb,
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struct netlink_callback *cb, struct inet_diag_req *r, struct nlattr *bc)
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{
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int i, num;
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@ -880,6 +880,7 @@ done:
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out:
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;
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}
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EXPORT_SYMBOL_GPL(inet_diag_dump_icsk);
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static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
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struct inet_diag_req *r, struct nlattr *bc)
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@ -888,7 +889,7 @@ static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
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handler = inet_diag_lock_handler(r->sdiag_protocol);
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if (!IS_ERR(handler))
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inet_diag_dump_icsk(handler->idiag_hashinfo, skb, cb, r, bc);
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handler->dump(skb, cb, r, bc);
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inet_diag_unlock_handler(handler);
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return skb->len;
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@ -34,8 +34,21 @@ static void tcp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
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tcp_get_info(sk, info);
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}
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static void tcp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
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struct inet_diag_req *r, struct nlattr *bc)
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{
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inet_diag_dump_icsk(&tcp_hashinfo, skb, cb, r, bc);
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}
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static int tcp_diag_dump_one(struct sk_buff *in_skb, const struct nlmsghdr *nlh,
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struct inet_diag_req *req)
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{
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return inet_diag_dump_one_icsk(&tcp_hashinfo, in_skb, nlh, req);
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}
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static const struct inet_diag_handler tcp_diag_handler = {
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.idiag_hashinfo = &tcp_hashinfo,
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.dump = tcp_diag_dump,
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.dump_one = tcp_diag_dump_one,
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.idiag_get_info = tcp_diag_get_info,
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.idiag_type = IPPROTO_TCP,
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};
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