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tcp: md5: constify tcp_md5_do_lookup() socket argument

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When TCP new listener is done, these functions will be called
without socket lock being held. Make sure they don't change
anything.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2015-09-25 07:39:15 -07:00 committed by David S. Miller
parent 4e3f5d727d
commit b83e3deb97
3 changed files with 10 additions and 10 deletions
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10
include/net/tcp.h
View file

@ -1372,16 +1372,16 @@ int tcp_md5_do_add(struct sock *sk, const union tcp_md5_addr *addr,
int family, const u8 *newkey, u8 newkeylen, gfp_t gfp); int family, const u8 *newkey, u8 newkeylen, gfp_t gfp);
int tcp_md5_do_del(struct sock *sk, const union tcp_md5_addr *addr, int tcp_md5_do_del(struct sock *sk, const union tcp_md5_addr *addr,
int family); int family);
struct tcp_md5sig_key *tcp_v4_md5_lookup(struct sock *sk, struct tcp_md5sig_key *tcp_v4_md5_lookup(const struct sock *sk,
const struct sock *addr_sk); const struct sock *addr_sk);
#ifdef CONFIG_TCP_MD5SIG #ifdef CONFIG_TCP_MD5SIG
struct tcp_md5sig_key *tcp_md5_do_lookup(struct sock *sk, struct tcp_md5sig_key *tcp_md5_do_lookup(const struct sock *sk,
const union tcp_md5_addr *addr, const union tcp_md5_addr *addr,
int family); int family);
#define tcp_twsk_md5_key(twsk) ((twsk)->tw_md5_key) #define tcp_twsk_md5_key(twsk) ((twsk)->tw_md5_key)
#else #else
static inline struct tcp_md5sig_key *tcp_md5_do_lookup(struct sock *sk, static inline struct tcp_md5sig_key *tcp_md5_do_lookup(const struct sock *sk,
const union tcp_md5_addr *addr, const union tcp_md5_addr *addr,
int family) int family)
{ {
@ -1684,7 +1684,7 @@ int tcp_conn_request(struct request_sock_ops *rsk_ops,
/* TCP af-specific functions */ /* TCP af-specific functions */
struct tcp_sock_af_ops { struct tcp_sock_af_ops {
#ifdef CONFIG_TCP_MD5SIG #ifdef CONFIG_TCP_MD5SIG
struct tcp_md5sig_key *(*md5_lookup) (struct sock *sk, struct tcp_md5sig_key *(*md5_lookup) (const struct sock *sk,
const struct sock *addr_sk); const struct sock *addr_sk);
int (*calc_md5_hash)(char *location, int (*calc_md5_hash)(char *location,
const struct tcp_md5sig_key *md5, const struct tcp_md5sig_key *md5,
@ -1699,7 +1699,7 @@ struct tcp_sock_af_ops {
struct tcp_request_sock_ops { struct tcp_request_sock_ops {
u16 mss_clamp; u16 mss_clamp;
#ifdef CONFIG_TCP_MD5SIG #ifdef CONFIG_TCP_MD5SIG
struct tcp_md5sig_key *(*req_md5_lookup)(struct sock *sk, struct tcp_md5sig_key *(*req_md5_lookup)(const struct sock *sk,
const struct sock *addr_sk); const struct sock *addr_sk);
int (*calc_md5_hash) (char *location, int (*calc_md5_hash) (char *location,
const struct tcp_md5sig_key *md5, const struct tcp_md5sig_key *md5,

6
net/ipv4/tcp_ipv4.c
View file

@ -865,7 +865,7 @@ static void tcp_v4_reqsk_destructor(struct request_sock *req)
*/ */
/* Find the Key structure for an address. */ /* Find the Key structure for an address. */
struct tcp_md5sig_key *tcp_md5_do_lookup(struct sock *sk, struct tcp_md5sig_key *tcp_md5_do_lookup(const struct sock *sk,
const union tcp_md5_addr *addr, const union tcp_md5_addr *addr,
int family) int family)
{ {
@ -877,7 +877,7 @@ struct tcp_md5sig_key *tcp_md5_do_lookup(struct sock *sk,
/* caller either holds rcu_read_lock() or socket lock */ /* caller either holds rcu_read_lock() or socket lock */
md5sig = rcu_dereference_check(tp->md5sig_info, md5sig = rcu_dereference_check(tp->md5sig_info,
sock_owned_by_user(sk) || sock_owned_by_user(sk) ||
lockdep_is_held(&sk->sk_lock.slock)); lockdep_is_held((spinlock_t *)&sk->sk_lock.slock));
if (!md5sig) if (!md5sig)
return NULL; return NULL;
#if IS_ENABLED(CONFIG_IPV6) #if IS_ENABLED(CONFIG_IPV6)
@ -894,7 +894,7 @@ struct tcp_md5sig_key *tcp_md5_do_lookup(struct sock *sk,
} }
EXPORT_SYMBOL(tcp_md5_do_lookup); EXPORT_SYMBOL(tcp_md5_do_lookup);
struct tcp_md5sig_key *tcp_v4_md5_lookup(struct sock *sk, struct tcp_md5sig_key *tcp_v4_md5_lookup(const struct sock *sk,
const struct sock *addr_sk) const struct sock *addr_sk)
{ {
const union tcp_md5_addr *addr; const union tcp_md5_addr *addr;

4
net/ipv6/tcp_ipv6.c
View file

@ -476,13 +476,13 @@ static void tcp_v6_reqsk_destructor(struct request_sock *req)
} }
#ifdef CONFIG_TCP_MD5SIG #ifdef CONFIG_TCP_MD5SIG
static struct tcp_md5sig_key *tcp_v6_md5_do_lookup(struct sock *sk, static struct tcp_md5sig_key *tcp_v6_md5_do_lookup(const struct sock *sk,
const struct in6_addr *addr) const struct in6_addr *addr)
{ {
return tcp_md5_do_lookup(sk, (union tcp_md5_addr *)addr, AF_INET6); return tcp_md5_do_lookup(sk, (union tcp_md5_addr *)addr, AF_INET6);
} }
static struct tcp_md5sig_key *tcp_v6_md5_lookup(struct sock *sk, static struct tcp_md5sig_key *tcp_v6_md5_lookup(const struct sock *sk,
const struct sock *addr_sk) const struct sock *addr_sk)
{ {
return tcp_v6_md5_do_lookup(sk, &addr_sk->sk_v6_daddr); return tcp_v6_md5_do_lookup(sk, &addr_sk->sk_v6_daddr);