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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>
This commit is contained in:
Pavel Emelyanov 2011-12-09 06:23:18 +00:00 committed by David S. Miller
parent 3c4d05c805
commit 1942c518ca
4 changed files with 51 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
include/linux/inet_diag.h
View File

@ -138,9 +138,18 @@ struct inet_hashinfo;
struct nlattr;
struct nlmsghdr;
struct sk_buff;
struct netlink_callback;
struct inet_diag_handler {
struct inet_hashinfo *idiag_hashinfo;
void (*dump)(struct sk_buff *skb,
struct netlink_callback *cb,
struct inet_diag_req *r,
struct nlattr *bc);
int (*dump_one)(struct sk_buff *in_skb,
const struct nlmsghdr *nlh,
struct inet_diag_req *req);
void (*idiag_get_info)(struct sock *sk,
struct inet_diag_msg *r,
void *info);
@ -152,6 +161,13 @@ int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
struct sk_buff *skb, struct inet_diag_req *req,
u32 pid, u32 seq, u16 nlmsg_flags,
const struct nlmsghdr *unlh);
void inet_diag_dump_icsk(struct inet_hashinfo *h, struct sk_buff *skb,
struct netlink_callback *cb, struct inet_diag_req *r,
struct nlattr *bc);
int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo,
struct sk_buff *in_skb, const struct nlmsghdr *nlh,
struct inet_diag_req *req);
int inet_diag_bc_sk(const struct nlattr *_bc, struct sock *sk);
int inet_diag_check_cookie(struct sock *sk, struct inet_diag_req *req);

15
net/dccp/diag.c
View File

@ -48,8 +48,21 @@ static void dccp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
dccp_get_info(sk, _info);
}
static void dccp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
struct inet_diag_req *r, struct nlattr *bc)
{
inet_diag_dump_icsk(&dccp_hashinfo, skb, cb, r, bc);
}
static int dccp_diag_dump_one(struct sk_buff *in_skb, const struct nlmsghdr *nlh,
struct inet_diag_req *req)
{
return inet_diag_dump_one_icsk(&dccp_hashinfo, in_skb, nlh, req);
}
static const struct inet_diag_handler dccp_diag_handler = {
.idiag_hashinfo = &dccp_hashinfo,
.dump = dccp_diag_dump,
.dump_one = dccp_diag_dump_one,
.idiag_get_info = dccp_diag_get_info,
.idiag_type = IPPROTO_DCCP,
};

11
net/ipv4/inet_diag.c
View File

@ -273,7 +273,7 @@ int inet_diag_check_cookie(struct sock *sk, struct inet_diag_req *req)
}
EXPORT_SYMBOL_GPL(inet_diag_check_cookie);
static int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *in_skb,
int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *in_skb,
const struct nlmsghdr *nlh, struct inet_diag_req *req)
{
int err;
@ -339,6 +339,7 @@ out:
out_nosk:
return err;
}
EXPORT_SYMBOL_GPL(inet_diag_dump_one_icsk);
static int inet_diag_get_exact(struct sk_buff *in_skb,
const struct nlmsghdr *nlh,
@ -351,8 +352,7 @@ static int inet_diag_get_exact(struct sk_buff *in_skb,
if (IS_ERR(handler))
err = PTR_ERR(handler);
else
err = inet_diag_dump_one_icsk(handler->idiag_hashinfo,
in_skb, nlh, req);
err = handler->dump_one(in_skb, nlh, req);
inet_diag_unlock_handler(handler);
return err;
@ -731,7 +731,7 @@ out:
return err;
}
static void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb,
void inet_diag_dump_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *skb,
struct netlink_callback *cb, struct inet_diag_req *r, struct nlattr *bc)
{
int i, num;
@ -880,6 +880,7 @@ done:
out:
;
}
EXPORT_SYMBOL_GPL(inet_diag_dump_icsk);
static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
struct inet_diag_req *r, struct nlattr *bc)
@ -888,7 +889,7 @@ static int __inet_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
handler = inet_diag_lock_handler(r->sdiag_protocol);
if (!IS_ERR(handler))
inet_diag_dump_icsk(handler->idiag_hashinfo, skb, cb, r, bc);
handler->dump(skb, cb, r, bc);
inet_diag_unlock_handler(handler);
return skb->len;

15
net/ipv4/tcp_diag.c
View File

@ -34,8 +34,21 @@ static void tcp_diag_get_info(struct sock *sk, struct inet_diag_msg *r,
tcp_get_info(sk, info);
}
static void tcp_diag_dump(struct sk_buff *skb, struct netlink_callback *cb,
struct inet_diag_req *r, struct nlattr *bc)
{
inet_diag_dump_icsk(&tcp_hashinfo, skb, cb, r, bc);
}
static int tcp_diag_dump_one(struct sk_buff *in_skb, const struct nlmsghdr *nlh,
struct inet_diag_req *req)
{
return inet_diag_dump_one_icsk(&tcp_hashinfo, in_skb, nlh, req);
}
static const struct inet_diag_handler tcp_diag_handler = {
.idiag_hashinfo = &tcp_hashinfo,
.dump = tcp_diag_dump,
.dump_one = tcp_diag_dump_one,
.idiag_get_info = tcp_diag_get_info,
.idiag_type = IPPROTO_TCP,
};