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inet: constify ip_route_output_flow() socket argument 

Very soon, TCP stack might call inet_csk_route_req(), which
calls inet_csk_route_req() with an unlocked listener socket,
so we need to make sure ip_route_output_flow() is not trying to
change any field from its socket argument.

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 07:39:10 -07:00 committed by David S. Miller
parent b1964b5fce
commit 6f9c961546
4 changed files with 10 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
include/net/dst.h
View File

@ -489,7 +489,8 @@ struct flowi;
#ifndef CONFIG_XFRM
static inline struct dst_entry *xfrm_lookup(struct net *net,
struct dst_entry *dst_orig,
const struct flowi *fl, struct sock *sk,
const struct flowi *fl,
const struct sock *sk,
int flags)
{
return dst_orig;
@ -498,7 +499,7 @@ static inline struct dst_entry *xfrm_lookup(struct net *net,
static inline struct dst_entry *xfrm_lookup_route(struct net *net,
struct dst_entry *dst_orig,
const struct flowi *fl,
struct sock *sk,
const struct sock *sk,
int flags)
{
return dst_orig;
@ -511,11 +512,11 @@ static inline struct xfrm_state *dst_xfrm(const struct dst_entry *dst)
#else
struct dst_entry *xfrm_lookup(struct net *net, struct dst_entry *dst_orig,
const struct flowi *fl, struct sock *sk,
const struct flowi *fl, const struct sock *sk,
int flags);
struct dst_entry *xfrm_lookup_route(struct net *net, struct dst_entry *dst_orig,
const struct flowi *fl, struct sock *sk,
const struct flowi *fl, const struct sock *sk,
int flags);
/* skb attached with this dst needs transformation if dst->xfrm is valid */

2
include/net/route.h
View File

@ -114,7 +114,7 @@ void rt_cache_flush(struct net *net);
void rt_flush_dev(struct net_device *dev);
struct rtable *__ip_route_output_key(struct net *, struct flowi4 *flp);
struct rtable *ip_route_output_flow(struct net *, struct flowi4 *flp,
struct sock *sk);
const struct sock *sk);
struct dst_entry *ipv4_blackhole_route(struct net *net,
struct dst_entry *dst_orig);

2
net/ipv4/route.c
View File

@ -2291,7 +2291,7 @@ struct dst_entry *ipv4_blackhole_route(struct net *net, struct dst_entry *dst_or
}
struct rtable *ip_route_output_flow(struct net *net, struct flowi4 *flp4,
struct sock *sk)
const struct sock *sk)
{
struct rtable *rt = __ip_route_output_key(net, flp4);

6
net/xfrm/xfrm_policy.c
View File

@ -1208,7 +1208,7 @@ static inline int policy_to_flow_dir(int dir)
}
}
static struct xfrm_policy *xfrm_sk_policy_lookup(struct sock *sk, int dir,
static struct xfrm_policy *xfrm_sk_policy_lookup(const struct sock *sk, int dir,
const struct flowi *fl)
{
struct xfrm_policy *pol;
@ -2185,7 +2185,7 @@ static struct dst_entry *make_blackhole(struct net *net, u16 family,
*/
struct dst_entry *xfrm_lookup(struct net *net, struct dst_entry *dst_orig,
const struct flowi *fl,
struct sock *sk, int flags)
const struct sock *sk, int flags)
{
struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
struct flow_cache_object *flo;
@ -2333,7 +2333,7 @@ EXPORT_SYMBOL(xfrm_lookup);
*/
struct dst_entry *xfrm_lookup_route(struct net *net, struct dst_entry *dst_orig,
const struct flowi *fl,
struct sock *sk, int flags)
const struct sock *sk, int flags)
{
struct dst_entry *dst = xfrm_lookup(net, dst_orig, fl, sk,
flags | XFRM_LOOKUP_QUEUE |