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| author | David S. Miller <davem@davemloft.net> | 2011-03-02 01:59:04 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-03-02 01:59:04 +0300 |
| commit | 2774c131b1d19920b4587db1cfbd6f0750ad1f15 (patch) | |
| tree | 3a0482c727cf4dcc046a211214f12459dcba8271 /net/xfrm | |
| parent | 69ead7afdf6028184f713a77376ee26f8aaafdcd (diff) | |
| download | linux-2774c131b1d19920b4587db1cfbd6f0750ad1f15.tar.xz | |
xfrm: Handle blackhole route creation via afinfo.
That way we don't have to potentially do this in every xfrm_lookup()
caller.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/xfrm')
| -rw-r--r-- | net/xfrm/xfrm_policy.c | 46 |
1 files changed, 26 insertions, 20 deletions
diff --git a/net/xfrm/xfrm_policy.c b/net/xfrm/xfrm_policy.c index f4c7467a614e..0248afa11cda 100644 --- a/net/xfrm/xfrm_policy.c +++ b/net/xfrm/xfrm_policy.c @@ -1735,14 +1735,31 @@ error: return ERR_PTR(err); } +static struct dst_entry *make_blackhole(struct net *net, u16 family, + struct dst_entry *dst_orig) +{ + struct xfrm_policy_afinfo *afinfo = xfrm_policy_get_afinfo(family); + struct dst_entry *ret; + + if (!afinfo) { + dst_release(dst_orig); + ret = ERR_PTR(-EINVAL); + } else { + ret = afinfo->blackhole_route(net, dst_orig); + } + xfrm_policy_put_afinfo(afinfo); + + return ret; +} + /* Main function: finds/creates a bundle for given flow. * * At the moment we eat a raw IP route. Mostly to speed up lookups * on interfaces with disabled IPsec. */ -int __xfrm_lookup(struct net *net, struct dst_entry **dst_p, - const struct flowi *fl, - struct sock *sk, int flags) +int xfrm_lookup(struct net *net, struct dst_entry **dst_p, + const struct flowi *fl, + struct sock *sk, int flags) { struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX]; struct flow_cache_object *flo; @@ -1829,7 +1846,12 @@ restart: dst_release(dst); xfrm_pols_put(pols, drop_pols); XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTNOSTATES); - return -EREMOTE; + + dst = make_blackhole(net, family, dst_orig); + if (IS_ERR(dst)) + return PTR_ERR(dst); + *dst_p = dst; + return 0; } if (fl->flags & FLOWI_FLAG_CAN_SLEEP) { DECLARE_WAITQUEUE(wait, current); @@ -1895,22 +1917,6 @@ dropdst: xfrm_pols_put(pols, drop_pols); return err; } -EXPORT_SYMBOL(__xfrm_lookup); - -int xfrm_lookup(struct net *net, struct dst_entry **dst_p, - const struct flowi *fl, - struct sock *sk, int flags) -{ - int err = __xfrm_lookup(net, dst_p, fl, sk, flags); - - if (err == -EREMOTE) { - dst_release(*dst_p); - *dst_p = NULL; - err = -EAGAIN; - } - - return err; -} EXPORT_SYMBOL(xfrm_lookup); static inline int |