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xfrm_policy: remove always true/false branches

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after previous change oldflo and xdst are always NULL.
These branches were already removed by gcc, this doesn't change code.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Westphal 2017-07-17 13:57:22 +02:00 committed by David S. Miller
parent 3ca28286ea
commit 855dad99c0
1 changed files with 14 additions and 60 deletions
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74
net/xfrm/xfrm_policy.c
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@ -2056,48 +2056,23 @@ xfrm_bundle_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir,
{
struct xfrm_policy *pols[XFRM_POLICY_TYPE_MAX];
struct xfrm_dst *xdst, *new_xdst;
int num_pols = 0, num_xfrms = 0, i, err, pol_dead;
struct flow_cache_object *oldflo = NULL;
int num_pols = 0, num_xfrms = 0, err;
/* Check if the policies from old bundle are usable */
xdst = NULL;
if (oldflo) {
xdst = container_of(oldflo, struct xfrm_dst, flo);
num_pols = xdst->num_pols;
num_xfrms = xdst->num_xfrms;
pol_dead = 0;
for (i = 0; i < num_pols; i++) {
pols[i] = xdst->pols[i];
pol_dead |= pols[i]->walk.dead;
}
if (pol_dead) {
/* Mark DST_OBSOLETE_DEAD to fail the next
* xfrm_dst_check()
*/
xdst->u.dst.obsolete = DST_OBSOLETE_DEAD;
dst_release_immediate(&xdst->u.dst);
xdst = NULL;
num_pols = 0;
num_xfrms = 0;
oldflo = NULL;
}
}
/* Resolve policies to use if we couldn't get them from
* previous cache entry */
if (xdst == NULL) {
num_pols = 1;
pols[0] = __xfrm_policy_lookup(net, fl, family,
flow_to_policy_dir(dir));
err = xfrm_expand_policies(fl, family, pols,
num_pols = 1;
pols[0] = __xfrm_policy_lookup(net, fl, family,
flow_to_policy_dir(dir));
err = xfrm_expand_policies(fl, family, pols,
&num_pols, &num_xfrms);
if (err < 0)
goto inc_error;
if (num_pols == 0)
return NULL;
if (num_xfrms <= 0)
goto make_dummy_bundle;
}
if (err < 0)
goto inc_error;
if (num_pols == 0)
return NULL;
if (num_xfrms <= 0)
goto make_dummy_bundle;
new_xdst = xfrm_resolve_and_create_bundle(pols, num_pols, fl, family,
xflo->dst_orig);
@ -2105,26 +2080,10 @@ xfrm_bundle_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir,
err = PTR_ERR(new_xdst);
if (err != -EAGAIN)
goto error;
if (oldflo == NULL)
goto make_dummy_bundle;
dst_hold(&xdst->u.dst);
return oldflo;
goto make_dummy_bundle;
} else if (new_xdst == NULL) {
num_xfrms = 0;
if (oldflo == NULL)
goto make_dummy_bundle;
xdst->num_xfrms = 0;
dst_hold(&xdst->u.dst);
return oldflo;
}
/* Kill the previous bundle */
if (xdst) {
/* The policies were stolen for newly generated bundle */
xdst->num_pols = 0;
/* Mark DST_OBSOLETE_DEAD to fail the next xfrm_dst_check() */
xdst->u.dst.obsolete = DST_OBSOLETE_DEAD;
dst_release_immediate(&xdst->u.dst);
goto make_dummy_bundle;
}
return &new_xdst->flo;
@ -2148,12 +2107,7 @@ xfrm_bundle_lookup(struct net *net, const struct flowi *fl, u16 family, u8 dir,
inc_error:
XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTPOLERROR);
error:
if (xdst != NULL) {
/* Mark DST_OBSOLETE_DEAD to fail the next xfrm_dst_check() */
xdst->u.dst.obsolete = DST_OBSOLETE_DEAD;
dst_release_immediate(&xdst->u.dst);
} else
xfrm_pols_put(pols, num_pols);
xfrm_pols_put(pols, num_pols);
return ERR_PTR(err);
}