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netfilter: nft_set_rbtree: Introduce and use nft_rbtree_interval_start() 

Replace negations of nft_rbtree_interval_end() with a new helper,
nft_rbtree_interval_start(), wherever this helps to visualise the
problem at hand, that is, for all the occurrences except for the
comparison against given flags in __nft_rbtree_get().

This gets especially useful in the next patch.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Stefano Brivio 2020-03-22 03:22:00 +01:00 committed by Pablo Neira Ayuso
parent 0eb4b5ee33
commit 6f7c9caf01
1 changed files with 11 additions and 6 deletions
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17
net/netfilter/nft_set_rbtree.c
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@ -33,6 +33,11 @@ static bool nft_rbtree_interval_end(const struct nft_rbtree_elem *rbe)
(*nft_set_ext_flags(&rbe->ext) & NFT_SET_ELEM_INTERVAL_END);
}
static bool nft_rbtree_interval_start(const struct nft_rbtree_elem *rbe)
{
return !nft_rbtree_interval_end(rbe);
}
static bool nft_rbtree_equal(const struct nft_set *set, const void *this,
const struct nft_rbtree_elem *interval)
{
@ -64,7 +69,7 @@ static bool __nft_rbtree_lookup(const struct net *net, const struct nft_set *set
if (interval &&
nft_rbtree_equal(set, this, interval) &&
nft_rbtree_interval_end(rbe) &&
!nft_rbtree_interval_end(interval))
nft_rbtree_interval_start(interval))
continue;
interval = rbe;
} else if (d > 0)
@ -89,7 +94,7 @@ static bool __nft_rbtree_lookup(const struct net *net, const struct nft_set *set
if (set->flags & NFT_SET_INTERVAL && interval != NULL &&
nft_set_elem_active(&interval->ext, genmask) &&
!nft_rbtree_interval_end(interval)) {
nft_rbtree_interval_start(interval)) {
*ext = &interval->ext;
return true;
}
@ -224,9 +229,9 @@ static int __nft_rbtree_insert(const struct net *net, const struct nft_set *set,
p = &parent->rb_right;
else {
if (nft_rbtree_interval_end(rbe) &&
!nft_rbtree_interval_end(new)) {
nft_rbtree_interval_start(new)) {
p = &parent->rb_left;
} else if (!nft_rbtree_interval_end(rbe) &&
} else if (nft_rbtree_interval_start(rbe) &&
nft_rbtree_interval_end(new)) {
p = &parent->rb_right;
} else if (nft_set_elem_active(&rbe->ext, genmask)) {
@ -317,10 +322,10 @@ static void *nft_rbtree_deactivate(const struct net *net,
parent = parent->rb_right;
else {
if (nft_rbtree_interval_end(rbe) &&
!nft_rbtree_interval_end(this)) {
nft_rbtree_interval_start(this)) {
parent = parent->rb_left;
continue;
} else if (!nft_rbtree_interval_end(rbe) &&
} else if (nft_rbtree_interval_start(rbe) &&
nft_rbtree_interval_end(this)) {
parent = parent->rb_right;
continue;