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authorPavel Emelyanov <xemul@parallels.com>2011-12-15 02:43:44 +0000
committerDavid S. Miller <davem@davemloft.net>2011-12-16 13:48:27 -0500
commitf65c1b534b99aef1809b893387b295963821549f (patch)
tree0718e1598b4d01c4c1817a3c663a312616f0dddd
parentaec8dc62f66199aef153d86e1f90d9c1d14696e3 (diff)
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sock_diag: Generalize requests cookies managements
The sk address is used as a cookie between dump/get_exact calls. It will be required for unix socket sdumping, so move it from inet_diag to sock_diag. Signed-off-by: Pavel Emelyanov <xemul@parallels.com> Signed-off-by: David S. Miller <davem@davemloft.net>
-rw-r--r--include/linux/inet_diag.h1
-rw-r--r--include/linux/sock_diag.h3
-rw-r--r--net/core/sock_diag.c19
-rw-r--r--net/ipv4/inet_diag.c23
-rw-r--r--net/ipv4/udp_diag.c2
5 files changed, 27 insertions, 21 deletions
diff --git a/include/linux/inet_diag.h b/include/linux/inet_diag.h
index a27e62178d43..afa5d5c74169 100644
--- a/include/linux/inet_diag.h
+++ b/include/linux/inet_diag.h
@@ -168,7 +168,6 @@ int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo,
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);
extern int inet_diag_register(const struct inet_diag_handler *handler);
extern void inet_diag_unregister(const struct inet_diag_handler *handler);
diff --git a/include/linux/sock_diag.h b/include/linux/sock_diag.h
index 7999778ad08d..379d5dccf8e1 100644
--- a/include/linux/sock_diag.h
+++ b/include/linux/sock_diag.h
@@ -22,5 +22,8 @@ void sock_diag_unregister(struct sock_diag_handler *h);
void sock_diag_register_inet_compat(int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh));
void sock_diag_unregister_inet_compat(int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh));
+int sock_diag_check_cookie(void *sk, __u32 *cookie);
+void sock_diag_save_cookie(void *sk, __u32 *cookie);
+
extern struct sock *sock_diag_nlsk;
#endif
diff --git a/net/core/sock_diag.c b/net/core/sock_diag.c
index cee96f368108..711bdefe7753 100644
--- a/net/core/sock_diag.c
+++ b/net/core/sock_diag.c
@@ -12,6 +12,25 @@ static struct sock_diag_handler *sock_diag_handlers[AF_MAX];
static int (*inet_rcv_compat)(struct sk_buff *skb, struct nlmsghdr *nlh);
static DEFINE_MUTEX(sock_diag_table_mutex);
+int sock_diag_check_cookie(void *sk, __u32 *cookie)
+{
+ if ((cookie[0] != INET_DIAG_NOCOOKIE ||
+ cookie[1] != INET_DIAG_NOCOOKIE) &&
+ ((u32)(unsigned long)sk != cookie[0] ||
+ (u32)((((unsigned long)sk) >> 31) >> 1) != cookie[1]))
+ return -ESTALE;
+ else
+ return 0;
+}
+EXPORT_SYMBOL_GPL(sock_diag_check_cookie);
+
+void sock_diag_save_cookie(void *sk, __u32 *cookie)
+{
+ cookie[0] = (u32)(unsigned long)sk;
+ cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1);
+}
+EXPORT_SYMBOL_GPL(sock_diag_save_cookie);
+
void sock_diag_register_inet_compat(int (*fn)(struct sk_buff *skb, struct nlmsghdr *nlh))
{
mutex_lock(&sock_diag_table_mutex);
diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index fa27313765f3..fb2e47ff59f7 100644
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -102,8 +102,7 @@ int inet_sk_diag_fill(struct sock *sk, struct inet_connection_sock *icsk,
r->idiag_retrans = 0;
r->id.idiag_if = sk->sk_bound_dev_if;
- r->id.idiag_cookie[0] = (u32)(unsigned long)sk;
- r->id.idiag_cookie[1] = (u32)(((unsigned long)sk >> 31) >> 1);
+ sock_diag_save_cookie(sk, r->id.idiag_cookie);
r->id.idiag_sport = inet->inet_sport;
r->id.idiag_dport = inet->inet_dport;
@@ -221,8 +220,7 @@ static int inet_twsk_diag_fill(struct inet_timewait_sock *tw,
r->idiag_family = tw->tw_family;
r->idiag_retrans = 0;
r->id.idiag_if = tw->tw_bound_dev_if;
- r->id.idiag_cookie[0] = (u32)(unsigned long)tw;
- r->id.idiag_cookie[1] = (u32)(((unsigned long)tw >> 31) >> 1);
+ sock_diag_save_cookie(tw, r->id.idiag_cookie);
r->id.idiag_sport = tw->tw_sport;
r->id.idiag_dport = tw->tw_dport;
r->id.idiag_src[0] = tw->tw_rcv_saddr;
@@ -261,18 +259,6 @@ static int sk_diag_fill(struct sock *sk, struct sk_buff *skb,
return inet_csk_diag_fill(sk, skb, r, pid, seq, nlmsg_flags, unlh);
}
-int inet_diag_check_cookie(struct sock *sk, struct inet_diag_req *req)
-{
- if ((req->id.idiag_cookie[0] != INET_DIAG_NOCOOKIE ||
- req->id.idiag_cookie[1] != INET_DIAG_NOCOOKIE) &&
- ((u32)(unsigned long)sk != req->id.idiag_cookie[0] ||
- (u32)((((unsigned long)sk) >> 31) >> 1) != req->id.idiag_cookie[1]))
- return -ESTALE;
- else
- return 0;
-}
-EXPORT_SYMBOL_GPL(inet_diag_check_cookie);
-
int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *in_skb,
const struct nlmsghdr *nlh, struct inet_diag_req *req)
{
@@ -304,7 +290,7 @@ int inet_diag_dump_one_icsk(struct inet_hashinfo *hashinfo, struct sk_buff *in_s
if (sk == NULL)
goto out_nosk;
- err = inet_diag_check_cookie(sk, req);
+ err = sock_diag_check_cookie(sk, req->id.idiag_cookie);
if (err)
goto out;
@@ -617,8 +603,7 @@ static int inet_diag_fill_req(struct sk_buff *skb, struct sock *sk,
r->idiag_retrans = req->retrans;
r->id.idiag_if = sk->sk_bound_dev_if;
- r->id.idiag_cookie[0] = (u32)(unsigned long)req;
- r->id.idiag_cookie[1] = (u32)(((unsigned long)req >> 31) >> 1);
+ sock_diag_save_cookie(req, r->id.idiag_cookie);
tmo = req->expires - jiffies;
if (tmo < 0)
diff --git a/net/ipv4/udp_diag.c b/net/ipv4/udp_diag.c
index fe9db8675acb..69f8a7ca63dd 100644
--- a/net/ipv4/udp_diag.c
+++ b/net/ipv4/udp_diag.c
@@ -57,7 +57,7 @@ static int udp_dump_one(struct udp_table *tbl, struct sk_buff *in_skb,
if (sk == NULL)
goto out_nosk;
- err = inet_diag_check_cookie(sk, req);
+ err = sock_diag_check_cookie(sk, req->id.idiag_cookie);
if (err)
goto out;